4205 lines
117 KiB
JavaScript
Executable File
4205 lines
117 KiB
JavaScript
Executable File
// Copyright 2005 Google
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//
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// Author: Steffen Meschkat <mesch@google.com>
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//
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// Miscellaneous utility and placeholder functions.
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// Dummy implmentation for the logging functions. Replace by something
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// useful when you want to debug.
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function xpathLog(msg) {};
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function xsltLog(msg) {};
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function xsltLogXml(msg) {};
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// Throws an exception if false.
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function assert(b) {
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if (!b) {
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throw "Assertion failed";
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}
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}
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// Splits a string s at all occurrences of character c. This is like
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// the split() method of the string object, but IE omits empty
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// strings, which violates the invariant (s.split(x).join(x) == s).
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function stringSplit(s, c) {
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var a = s.indexOf(c);
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if (a == -1) {
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return [ s ];
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}
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var parts = [];
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parts.push(s.substr(0,a));
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while (a != -1) {
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var a1 = s.indexOf(c, a + 1);
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if (a1 != -1) {
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parts.push(s.substr(a + 1, a1 - a - 1));
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} else {
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parts.push(s.substr(a + 1));
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}
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a = a1;
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}
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return parts;
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}
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// The following function does what document.importNode(node, true)
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// would do for us here; however that method is broken in Safari/1.3,
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// so we have to emulate it.
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function xmlImportNode(doc, node) {
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if (node.nodeType == DOM_TEXT_NODE) {
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return domCreateTextNode(doc, node.nodeValue);
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} else if (node.nodeType == DOM_CDATA_SECTION_NODE) {
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return domCreateCDATASection(doc, node.nodeValue);
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} else if (node.nodeType == DOM_ELEMENT_NODE) {
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var newNode = domCreateElement(doc, node.nodeName);
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for (var i = 0; i < node.attributes.length; ++i) {
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var an = node.attributes[i];
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var name = an.nodeName;
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var value = an.nodeValue;
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domSetAttribute(newNode, name, value);
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}
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for (var c = node.firstChild; c; c = c.nextSibling) {
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var cn = arguments.callee(doc, c);
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domAppendChild(newNode, cn);
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}
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return newNode;
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} else {
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return domCreateComment(doc, node.nodeName);
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}
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}
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// A set data structure. It can also be used as a map (i.e. the keys
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// can have values other than 1), but we don't call it map because it
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// would be ambiguous in this context. Also, the map is iterable, so
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// we can use it to replace for-in loops over core javascript Objects.
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// For-in iteration breaks when Object.prototype is modified, which
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// some clients of the maps API do.
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//
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// NOTE(mesch): The set keys by the string value of its element, NOT
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// by the typed value. In particular, objects can't be used as keys.
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//
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// @constructor
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function Set() {
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this.keys = [];
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}
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Set.prototype.size = function() {
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return this.keys.length;
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}
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// Adds the entry to the set, ignoring if it is present.
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Set.prototype.add = function(key, opt_value) {
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var value = opt_value || 1;
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if (!this.contains(key)) {
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this[':' + key] = value;
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this.keys.push(key);
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}
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}
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// Sets the entry in the set, adding if it is not yet present.
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Set.prototype.set = function(key, opt_value) {
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var value = opt_value || 1;
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if (!this.contains(key)) {
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this[':' + key] = value;
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this.keys.push(key);
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} else {
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this[':' + key] = value;
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}
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}
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// Increments the key's value by 1. This works around the fact that
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// numbers are always passed by value, never by reference, so that we
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// can't increment the value returned by get(), or the iterator
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// argument. Sets the key's value to 1 if it doesn't exist yet.
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Set.prototype.inc = function(key) {
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if (!this.contains(key)) {
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this[':' + key] = 1;
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this.keys.push(key);
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} else {
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this[':' + key]++;
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}
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}
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Set.prototype.get = function(key) {
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if (this.contains(key)) {
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return this[':' + key];
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} else {
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var undefined;
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return undefined;
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}
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}
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// Removes the entry from the set.
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Set.prototype.remove = function(key) {
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if (this.contains(key)) {
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delete this[':' + key];
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removeFromArray(this.keys, key, true);
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}
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}
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// Tests if an entry is in the set.
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Set.prototype.contains = function(entry) {
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return typeof this[':' + entry] != 'undefined';
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}
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// Gets a list of values in the set.
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Set.prototype.items = function() {
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var list = [];
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for (var i = 0; i < this.keys.length; ++i) {
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var k = this.keys[i];
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var v = this[':' + k];
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list.push(v);
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}
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return list;
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}
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// Invokes function f for every key value pair in the set as a method
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// of the set.
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Set.prototype.map = function(f) {
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for (var i = 0; i < this.keys.length; ++i) {
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var k = this.keys[i];
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f.call(this, k, this[':' + k]);
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}
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}
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Set.prototype.clear = function() {
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for (var i = 0; i < this.keys.length; ++i) {
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delete this[':' + this.keys[i]];
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}
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this.keys.length = 0;
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}
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// Applies the given function to each element of the array, preserving
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// this, and passing the index.
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function mapExec(array, func) {
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for (var i = 0; i < array.length; ++i) {
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func.call(this, array[i], i);
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}
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}
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// Returns an array that contains the return value of the given
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// function applied to every element of the input array.
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function mapExpr(array, func) {
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var ret = [];
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for (var i = 0; i < array.length; ++i) {
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ret.push(func(array[i]));
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}
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return ret;
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};
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// Reverses the given array in place.
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function reverseInplace(array) {
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for (var i = 0; i < array.length / 2; ++i) {
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var h = array[i];
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var ii = array.length - i - 1;
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array[i] = array[ii];
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array[ii] = h;
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}
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}
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// Removes value from array. Returns the number of instances of value
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// that were removed from array.
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function removeFromArray(array, value, opt_notype) {
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var shift = 0;
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for (var i = 0; i < array.length; ++i) {
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if (array[i] === value || (opt_notype && array[i] == value)) {
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array.splice(i--, 1);
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shift++;
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}
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}
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return shift;
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}
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// Shallow-copies an array.
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function copyArray(dst, src) {
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for (var i = 0; i < src.length; ++i) {
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dst.push(src[i]);
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}
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}
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// Returns the text value of a node; for nodes without children this
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// is the nodeValue, for nodes with children this is the concatenation
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// of the value of all children.
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function xmlValue(node) {
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if (!node) {
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return '';
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}
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var ret = '';
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if (node.nodeType == DOM_TEXT_NODE ||
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node.nodeType == DOM_CDATA_SECTION_NODE ||
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node.nodeType == DOM_ATTRIBUTE_NODE) {
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ret += node.nodeValue;
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} else if (node.nodeType == DOM_ELEMENT_NODE ||
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node.nodeType == DOM_DOCUMENT_NODE ||
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node.nodeType == DOM_DOCUMENT_FRAGMENT_NODE) {
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for (var i = 0; i < node.childNodes.length; ++i) {
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ret += arguments.callee(node.childNodes[i]);
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}
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}
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return ret;
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}
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// Returns the representation of a node as XML text.
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function xmlText(node, opt_cdata) {
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var buf = [];
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xmlTextR(node, buf, opt_cdata);
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return buf.join('');
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}
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function xmlTextR(node, buf, cdata) {
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if (node.nodeType == DOM_TEXT_NODE) {
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buf.push(xmlEscapeText(node.nodeValue));
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} else if (node.nodeType == DOM_CDATA_SECTION_NODE) {
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if (cdata) {
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buf.push(node.nodeValue);
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} else {
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buf.push('<![CDATA[' + node.nodeValue + ']]>');
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}
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} else if (node.nodeType == DOM_COMMENT_NODE) {
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buf.push('<!--' + node.nodeValue + '-->');
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} else if (node.nodeType == DOM_ELEMENT_NODE) {
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buf.push('<' + xmlFullNodeName(node));
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for (var i = 0; i < node.attributes.length; ++i) {
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var a = node.attributes[i];
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if (a && a.nodeName && a.nodeValue) {
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buf.push(' ' + xmlFullNodeName(a) + '="' +
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xmlEscapeAttr(a.nodeValue) + '"');
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}
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}
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if (node.childNodes.length == 0) {
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buf.push('/>');
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} else {
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buf.push('>');
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for (var i = 0; i < node.childNodes.length; ++i) {
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arguments.callee(node.childNodes[i], buf, cdata);
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}
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buf.push('</' + xmlFullNodeName(node) + '>');
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}
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} else if (node.nodeType == DOM_DOCUMENT_NODE ||
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node.nodeType == DOM_DOCUMENT_FRAGMENT_NODE) {
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for (var i = 0; i < node.childNodes.length; ++i) {
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arguments.callee(node.childNodes[i], buf, cdata);
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}
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}
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}
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function xmlFullNodeName(n) {
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if (n.prefix && n.nodeName.indexOf(n.prefix + ':') != 0) {
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return n.prefix + ':' + n.nodeName;
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} else {
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return n.nodeName;
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}
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}
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// Escape XML special markup chracters: tag delimiter < > and entity
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// reference start delimiter &. The escaped string can be used in XML
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// text portions (i.e. between tags).
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function xmlEscapeText(s) {
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return ('' + s).replace(/&/g, '&').replace(/</g, '<').
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replace(/>/g, '>');
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}
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// Escape XML special markup characters: tag delimiter < > entity
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// reference start delimiter & and quotes ". The escaped string can be
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// used in double quoted XML attribute value portions (i.e. in
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// attributes within start tags).
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function xmlEscapeAttr(s) {
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return xmlEscapeText(s).replace(/\"/g, '"');
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}
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// Escape markup in XML text, but don't touch entity references. The
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// escaped string can be used as XML text (i.e. between tags).
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function xmlEscapeTags(s) {
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return s.replace(/</g, '<').replace(/>/g, '>');
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}
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/**
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* Wrapper function to access the owner document uniformly for document
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* and other nodes: for the document node, the owner document is the
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* node itself, for all others it's the ownerDocument property.
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*
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* @param {Node} node
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* @return {Document}
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*/
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function xmlOwnerDocument(node) {
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if (node.nodeType == DOM_DOCUMENT_NODE) {
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return node;
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} else {
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return node.ownerDocument;
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}
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}
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// Wrapper around DOM methods so we can condense their invocations.
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function domGetAttribute(node, name) {
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return node.getAttribute(name);
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}
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function domSetAttribute(node, name, value) {
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return node.setAttribute(name, value);
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}
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function domRemoveAttribute(node, name) {
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return node.removeAttribute(name);
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}
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function domAppendChild(node, child) {
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return node.appendChild(child);
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}
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function domRemoveChild(node, child) {
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return node.removeChild(child);
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}
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function domReplaceChild(node, newChild, oldChild) {
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return node.replaceChild(newChild, oldChild);
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}
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function domInsertBefore(node, newChild, oldChild) {
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return node.insertBefore(newChild, oldChild);
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}
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function domRemoveNode(node) {
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return domRemoveChild(node.parentNode, node);
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}
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function domCreateTextNode(doc, text) {
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return doc.createTextNode(text);
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}
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function domCreateElement(doc, name) {
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return doc.createElement(name);
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}
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function domCreateAttribute(doc, name) {
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return doc.createAttribute(name);
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}
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function domCreateCDATASection(doc, data) {
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return doc.createCDATASection(data);
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}
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function domCreateComment(doc, text) {
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return doc.createComment(text);
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}
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function domCreateDocumentFragment(doc) {
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return doc.createDocumentFragment();
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}
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function domGetElementById(doc, id) {
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return doc.getElementById(id);
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}
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// Same for window methods.
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function windowSetInterval(win, fun, time) {
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return win.setInterval(fun, time);
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}
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function windowClearInterval(win, id) {
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return win.clearInterval(id);
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}
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// Copyright 2006 Google Inc.
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// All Rights Reserved
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//
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// Defines regular expression patterns to extract XML tokens from string.
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// See <http://www.w3.org/TR/REC-xml/#sec-common-syn>,
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// <http://www.w3.org/TR/xml11/#sec-common-syn> and
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// <http://www.w3.org/TR/REC-xml-names/#NT-NCName> for the specifications.
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//
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// Author: Junji Takagi <jtakagi@google.com>
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// Detect whether RegExp supports Unicode characters or not.
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var REGEXP_UNICODE = function() {
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var tests = [' ', '\u0120', -1, // Konquerer 3.4.0 fails here.
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'!', '\u0120', -1,
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'\u0120', '\u0120', 0,
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'\u0121', '\u0120', -1,
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'\u0121', '\u0120|\u0121', 0,
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'\u0122', '\u0120|\u0121', -1,
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'\u0120', '[\u0120]', 0, // Safari 2.0.3 fails here.
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'\u0121', '[\u0120]', -1,
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'\u0121', '[\u0120\u0121]', 0, // Safari 2.0.3 fails here.
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'\u0122', '[\u0120\u0121]', -1,
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'\u0121', '[\u0120-\u0121]', 0, // Safari 2.0.3 fails here.
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'\u0122', '[\u0120-\u0121]', -1];
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for (var i = 0; i < tests.length; i += 3) {
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if (tests[i].search(new RegExp(tests[i + 1])) != tests[i + 2]) {
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return false;
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}
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}
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return true;
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}();
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// Common tokens in XML 1.0 and XML 1.1.
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var XML_S = '[ \t\r\n]+';
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var XML_EQ = '(' + XML_S + ')?=(' + XML_S + ')?';
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var XML_CHAR_REF = '&#[0-9]+;|&#x[0-9a-fA-F]+;';
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// XML 1.0 tokens.
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var XML10_VERSION_INFO = XML_S + 'version' + XML_EQ + '("1\\.0"|' + "'1\\.0')";
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var XML10_BASE_CHAR = (REGEXP_UNICODE) ?
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'\u0041-\u005a\u0061-\u007a\u00c0-\u00d6\u00d8-\u00f6\u00f8-\u00ff' +
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'\u0100-\u0131\u0134-\u013e\u0141-\u0148\u014a-\u017e\u0180-\u01c3' +
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'\u01cd-\u01f0\u01f4-\u01f5\u01fa-\u0217\u0250-\u02a8\u02bb-\u02c1\u0386' +
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'\u0388-\u038a\u038c\u038e-\u03a1\u03a3-\u03ce\u03d0-\u03d6\u03da\u03dc' +
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'\u03de\u03e0\u03e2-\u03f3\u0401-\u040c\u040e-\u044f\u0451-\u045c' +
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'\u045e-\u0481\u0490-\u04c4\u04c7-\u04c8\u04cb-\u04cc\u04d0-\u04eb' +
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'\u04ee-\u04f5\u04f8-\u04f9\u0531-\u0556\u0559\u0561-\u0586\u05d0-\u05ea' +
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'\u05f0-\u05f2\u0621-\u063a\u0641-\u064a\u0671-\u06b7\u06ba-\u06be' +
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'\u06c0-\u06ce\u06d0-\u06d3\u06d5\u06e5-\u06e6\u0905-\u0939\u093d' +
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'\u0958-\u0961\u0985-\u098c\u098f-\u0990\u0993-\u09a8\u09aa-\u09b0\u09b2' +
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'\u09b6-\u09b9\u09dc-\u09dd\u09df-\u09e1\u09f0-\u09f1\u0a05-\u0a0a' +
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'\u0a0f-\u0a10\u0a13-\u0a28\u0a2a-\u0a30\u0a32-\u0a33\u0a35-\u0a36' +
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'\u0a38-\u0a39\u0a59-\u0a5c\u0a5e\u0a72-\u0a74\u0a85-\u0a8b\u0a8d' +
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'\u0a8f-\u0a91\u0a93-\u0aa8\u0aaa-\u0ab0\u0ab2-\u0ab3\u0ab5-\u0ab9' +
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'\u0abd\u0ae0\u0b05-\u0b0c\u0b0f-\u0b10\u0b13-\u0b28\u0b2a-\u0b30' +
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'\u0b32-\u0b33\u0b36-\u0b39\u0b3d\u0b5c-\u0b5d\u0b5f-\u0b61\u0b85-\u0b8a' +
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'\u0b8e-\u0b90\u0b92-\u0b95\u0b99-\u0b9a\u0b9c\u0b9e-\u0b9f\u0ba3-\u0ba4' +
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'\u0ba8-\u0baa\u0bae-\u0bb5\u0bb7-\u0bb9\u0c05-\u0c0c\u0c0e-\u0c10' +
|
|
'\u0c12-\u0c28\u0c2a-\u0c33\u0c35-\u0c39\u0c60-\u0c61\u0c85-\u0c8c' +
|
|
'\u0c8e-\u0c90\u0c92-\u0ca8\u0caa-\u0cb3\u0cb5-\u0cb9\u0cde\u0ce0-\u0ce1' +
|
|
'\u0d05-\u0d0c\u0d0e-\u0d10\u0d12-\u0d28\u0d2a-\u0d39\u0d60-\u0d61' +
|
|
'\u0e01-\u0e2e\u0e30\u0e32-\u0e33\u0e40-\u0e45\u0e81-\u0e82\u0e84' +
|
|
'\u0e87-\u0e88\u0e8a\u0e8d\u0e94-\u0e97\u0e99-\u0e9f\u0ea1-\u0ea3\u0ea5' +
|
|
'\u0ea7\u0eaa-\u0eab\u0ead-\u0eae\u0eb0\u0eb2-\u0eb3\u0ebd\u0ec0-\u0ec4' +
|
|
'\u0f40-\u0f47\u0f49-\u0f69\u10a0-\u10c5\u10d0-\u10f6\u1100\u1102-\u1103' +
|
|
'\u1105-\u1107\u1109\u110b-\u110c\u110e-\u1112\u113c\u113e\u1140\u114c' +
|
|
'\u114e\u1150\u1154-\u1155\u1159\u115f-\u1161\u1163\u1165\u1167\u1169' +
|
|
'\u116d-\u116e\u1172-\u1173\u1175\u119e\u11a8\u11ab\u11ae-\u11af' +
|
|
'\u11b7-\u11b8\u11ba\u11bc-\u11c2\u11eb\u11f0\u11f9\u1e00-\u1e9b' +
|
|
'\u1ea0-\u1ef9\u1f00-\u1f15\u1f18-\u1f1d\u1f20-\u1f45\u1f48-\u1f4d' +
|
|
'\u1f50-\u1f57\u1f59\u1f5b\u1f5d\u1f5f-\u1f7d\u1f80-\u1fb4\u1fb6-\u1fbc' +
|
|
'\u1fbe\u1fc2-\u1fc4\u1fc6-\u1fcc\u1fd0-\u1fd3\u1fd6-\u1fdb\u1fe0-\u1fec' +
|
|
'\u1ff2-\u1ff4\u1ff6-\u1ffc\u2126\u212a-\u212b\u212e\u2180-\u2182' +
|
|
'\u3041-\u3094\u30a1-\u30fa\u3105-\u312c\uac00-\ud7a3' :
|
|
'A-Za-z';
|
|
var XML10_IDEOGRAPHIC = (REGEXP_UNICODE) ?
|
|
'\u4e00-\u9fa5\u3007\u3021-\u3029' :
|
|
'';
|
|
var XML10_COMBINING_CHAR = (REGEXP_UNICODE) ?
|
|
'\u0300-\u0345\u0360-\u0361\u0483-\u0486\u0591-\u05a1\u05a3-\u05b9' +
|
|
'\u05bb-\u05bd\u05bf\u05c1-\u05c2\u05c4\u064b-\u0652\u0670\u06d6-\u06dc' +
|
|
'\u06dd-\u06df\u06e0-\u06e4\u06e7-\u06e8\u06ea-\u06ed\u0901-\u0903\u093c' +
|
|
'\u093e-\u094c\u094d\u0951-\u0954\u0962-\u0963\u0981-\u0983\u09bc\u09be' +
|
|
'\u09bf\u09c0-\u09c4\u09c7-\u09c8\u09cb-\u09cd\u09d7\u09e2-\u09e3\u0a02' +
|
|
'\u0a3c\u0a3e\u0a3f\u0a40-\u0a42\u0a47-\u0a48\u0a4b-\u0a4d\u0a70-\u0a71' +
|
|
'\u0a81-\u0a83\u0abc\u0abe-\u0ac5\u0ac7-\u0ac9\u0acb-\u0acd\u0b01-\u0b03' +
|
|
'\u0b3c\u0b3e-\u0b43\u0b47-\u0b48\u0b4b-\u0b4d\u0b56-\u0b57\u0b82-\u0b83' +
|
|
'\u0bbe-\u0bc2\u0bc6-\u0bc8\u0bca-\u0bcd\u0bd7\u0c01-\u0c03\u0c3e-\u0c44' +
|
|
'\u0c46-\u0c48\u0c4a-\u0c4d\u0c55-\u0c56\u0c82-\u0c83\u0cbe-\u0cc4' +
|
|
'\u0cc6-\u0cc8\u0cca-\u0ccd\u0cd5-\u0cd6\u0d02-\u0d03\u0d3e-\u0d43' +
|
|
'\u0d46-\u0d48\u0d4a-\u0d4d\u0d57\u0e31\u0e34-\u0e3a\u0e47-\u0e4e\u0eb1' +
|
|
'\u0eb4-\u0eb9\u0ebb-\u0ebc\u0ec8-\u0ecd\u0f18-\u0f19\u0f35\u0f37\u0f39' +
|
|
'\u0f3e\u0f3f\u0f71-\u0f84\u0f86-\u0f8b\u0f90-\u0f95\u0f97\u0f99-\u0fad' +
|
|
'\u0fb1-\u0fb7\u0fb9\u20d0-\u20dc\u20e1\u302a-\u302f\u3099\u309a' :
|
|
'';
|
|
var XML10_DIGIT = (REGEXP_UNICODE) ?
|
|
'\u0030-\u0039\u0660-\u0669\u06f0-\u06f9\u0966-\u096f\u09e6-\u09ef' +
|
|
'\u0a66-\u0a6f\u0ae6-\u0aef\u0b66-\u0b6f\u0be7-\u0bef\u0c66-\u0c6f' +
|
|
'\u0ce6-\u0cef\u0d66-\u0d6f\u0e50-\u0e59\u0ed0-\u0ed9\u0f20-\u0f29' :
|
|
'0-9';
|
|
var XML10_EXTENDER = (REGEXP_UNICODE) ?
|
|
'\u00b7\u02d0\u02d1\u0387\u0640\u0e46\u0ec6\u3005\u3031-\u3035' +
|
|
'\u309d-\u309e\u30fc-\u30fe' :
|
|
'';
|
|
var XML10_LETTER = XML10_BASE_CHAR + XML10_IDEOGRAPHIC;
|
|
var XML10_NAME_CHAR = XML10_LETTER + XML10_DIGIT + '\\._:' +
|
|
XML10_COMBINING_CHAR + XML10_EXTENDER + '-';
|
|
var XML10_NAME = '[' + XML10_LETTER + '_:][' + XML10_NAME_CHAR + ']*';
|
|
|
|
var XML10_ENTITY_REF = '&' + XML10_NAME + ';';
|
|
var XML10_REFERENCE = XML10_ENTITY_REF + '|' + XML_CHAR_REF;
|
|
var XML10_ATT_VALUE = '"(([^<&"]|' + XML10_REFERENCE + ')*)"|' +
|
|
"'(([^<&']|" + XML10_REFERENCE + ")*)'";
|
|
var XML10_ATTRIBUTE =
|
|
'(' + XML10_NAME + ')' + XML_EQ + '(' + XML10_ATT_VALUE + ')';
|
|
|
|
// XML 1.1 tokens.
|
|
// TODO(jtakagi): NameStartChar also includes \u10000-\ueffff.
|
|
// ECMAScript Language Specifiction defines UnicodeEscapeSequence as
|
|
// "\u HexDigit HexDigit HexDigit HexDigit" and we may need to use
|
|
// surrogate pairs, but any browser doesn't support surrogate paris in
|
|
// character classes of regular expression, so avoid including them for now.
|
|
|
|
var XML11_VERSION_INFO = XML_S + 'version' + XML_EQ + '("1\\.1"|' + "'1\\.1')";
|
|
var XML11_NAME_START_CHAR = (REGEXP_UNICODE) ?
|
|
':A-Z_a-z\u00c0-\u00d6\u00d8-\u00f6\u00f8-\u02ff\u0370-\u037d' +
|
|
'\u037f-\u1fff\u200c-\u200d\u2070-\u218f\u2c00-\u2fef\u3001-\ud7ff' +
|
|
'\uf900-\ufdcf\ufdf0-\ufffd' :
|
|
':A-Z_a-z';
|
|
var XML11_NAME_CHAR = XML11_NAME_START_CHAR +
|
|
((REGEXP_UNICODE) ? '\\.0-9\u00b7\u0300-\u036f\u203f-\u2040-' : '\\.0-9-');
|
|
var XML11_NAME = '[' + XML11_NAME_START_CHAR + '][' + XML11_NAME_CHAR + ']*';
|
|
|
|
var XML11_ENTITY_REF = '&' + XML11_NAME + ';';
|
|
var XML11_REFERENCE = XML11_ENTITY_REF + '|' + XML_CHAR_REF;
|
|
var XML11_ATT_VALUE = '"(([^<&"]|' + XML11_REFERENCE + ')*)"|' +
|
|
"'(([^<&']|" + XML11_REFERENCE + ")*)'";
|
|
var XML11_ATTRIBUTE =
|
|
'(' + XML11_NAME + ')' + XML_EQ + '(' + XML11_ATT_VALUE + ')';
|
|
|
|
// XML Namespace tokens.
|
|
// Used in XML parser and XPath parser.
|
|
|
|
var XML_NC_NAME_CHAR = XML10_LETTER + XML10_DIGIT + '\\._' +
|
|
XML10_COMBINING_CHAR + XML10_EXTENDER + '-';
|
|
var XML_NC_NAME = '[' + XML10_LETTER + '_][' + XML_NC_NAME_CHAR + ']*';
|
|
|
|
|
|
// Copyright 2005 Google Inc.
|
|
// All Rights Reserved
|
|
//
|
|
// Author: Steffen Meschkat <mesch@google.com>
|
|
//
|
|
// An XML parse and a minimal DOM implementation that just supportes
|
|
// the subset of the W3C DOM that is used in the XSLT implementation.
|
|
|
|
// NOTE: The split() method in IE omits empty result strings. This is
|
|
// utterly annoying. So we don't use it here.
|
|
|
|
// Resolve entities in XML text fragments. According to the DOM
|
|
// specification, the DOM is supposed to resolve entity references at
|
|
// the API level. I.e. no entity references are passed through the
|
|
// API. See "Entities and the DOM core", p.12, DOM 2 Core
|
|
// Spec. However, different browsers actually pass very different
|
|
// values at the API. See <http://mesch.nyc/test-xml-quote>.
|
|
function xmlResolveEntities(s) {
|
|
|
|
var parts = stringSplit(s, '&');
|
|
|
|
var ret = parts[0];
|
|
for (var i = 1; i < parts.length; ++i) {
|
|
var rp = parts[i].indexOf(';');
|
|
if (rp == -1) {
|
|
// no entity reference: just a & but no ;
|
|
ret += parts[i];
|
|
continue;
|
|
}
|
|
|
|
var entityName = parts[i].substring(0, rp);
|
|
var remainderText = parts[i].substring(rp + 1);
|
|
|
|
var ch;
|
|
switch (entityName) {
|
|
case 'lt':
|
|
ch = '<';
|
|
break;
|
|
case 'gt':
|
|
ch = '>';
|
|
break;
|
|
case 'amp':
|
|
ch = '&';
|
|
break;
|
|
case 'quot':
|
|
ch = '"';
|
|
break;
|
|
case 'apos':
|
|
ch = '\'';
|
|
break;
|
|
case 'nbsp':
|
|
ch = String.fromCharCode(160);
|
|
break;
|
|
default:
|
|
// Cool trick: let the DOM do the entity decoding. We assign
|
|
// the entity text through non-W3C DOM properties and read it
|
|
// through the W3C DOM. W3C DOM access is specified to resolve
|
|
// entities.
|
|
var span = domCreateElement(window.document, 'span');
|
|
span.innerHTML = '&' + entityName + '; ';
|
|
ch = span.childNodes[0].nodeValue.charAt(0);
|
|
}
|
|
ret += ch + remainderText;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
var XML10_TAGNAME_REGEXP = new RegExp('^(' + XML10_NAME + ')');
|
|
var XML10_ATTRIBUTE_REGEXP = new RegExp(XML10_ATTRIBUTE, 'g');
|
|
|
|
var XML11_TAGNAME_REGEXP = new RegExp('^(' + XML11_NAME + ')');
|
|
var XML11_ATTRIBUTE_REGEXP = new RegExp(XML11_ATTRIBUTE, 'g');
|
|
|
|
// Parses the given XML string with our custom, JavaScript XML parser. Written
|
|
// by Steffen Meschkat (mesch@google.com).
|
|
function xmlParse(xml) {
|
|
var regex_empty = /\/$/;
|
|
|
|
var regex_tagname;
|
|
var regex_attribute;
|
|
if (xml.match(/^<\?xml/)) {
|
|
// When an XML document begins with an XML declaration
|
|
// VersionInfo must appear.
|
|
if (xml.search(new RegExp(XML10_VERSION_INFO)) == 5) {
|
|
regex_tagname = XML10_TAGNAME_REGEXP;
|
|
regex_attribute = XML10_ATTRIBUTE_REGEXP;
|
|
} else if (xml.search(new RegExp(XML11_VERSION_INFO)) == 5) {
|
|
regex_tagname = XML11_TAGNAME_REGEXP;
|
|
regex_attribute = XML11_ATTRIBUTE_REGEXP;
|
|
} else {
|
|
// VersionInfo is missing, or unknown version number.
|
|
// TODO : Fallback to XML 1.0 or XML 1.1, or just return null?
|
|
alert('VersionInfo is missing, or unknown version number.');
|
|
}
|
|
} else {
|
|
// When an XML declaration is missing it's an XML 1.0 document.
|
|
regex_tagname = XML10_TAGNAME_REGEXP;
|
|
regex_attribute = XML10_ATTRIBUTE_REGEXP;
|
|
}
|
|
|
|
var xmldoc = new XDocument();
|
|
var root = xmldoc;
|
|
|
|
// For the record: in Safari, we would create native DOM nodes, but
|
|
// in Opera that is not possible, because the DOM only allows HTML
|
|
// element nodes to be created, so we have to do our own DOM nodes.
|
|
|
|
// xmldoc = document.implementation.createDocument('','',null);
|
|
// root = xmldoc; // .createDocumentFragment();
|
|
// NOTE(mesch): using the DocumentFragment instead of the Document
|
|
// crashes my Safari 1.2.4 (v125.12).
|
|
var stack = [];
|
|
|
|
var parent = root;
|
|
stack.push(parent);
|
|
|
|
// The token that delimits a section that contains markup as
|
|
// content: CDATA or comments.
|
|
var slurp = '';
|
|
|
|
var x = stringSplit(xml, '<');
|
|
for (var i = 1; i < x.length; ++i) {
|
|
var xx = stringSplit(x[i], '>');
|
|
var tag = xx[0];
|
|
var text = xmlResolveEntities(xx[1] || '');
|
|
|
|
if (slurp) {
|
|
// In a "slurp" section (CDATA or comment): only check for the
|
|
// end of the section, otherwise append the whole text.
|
|
var end = x[i].indexOf(slurp);
|
|
if (end != -1) {
|
|
var data = x[i].substring(0, end);
|
|
parent.nodeValue += '<' + data;
|
|
stack.pop();
|
|
parent = stack[stack.length-1];
|
|
text = x[i].substring(end + slurp.length);
|
|
slurp = '';
|
|
} else {
|
|
parent.nodeValue += '<' + x[i];
|
|
text = null;
|
|
}
|
|
|
|
} else if (tag.indexOf('![CDATA[') == 0) {
|
|
var start = '![CDATA['.length;
|
|
var end = x[i].indexOf(']]>');
|
|
if (end != -1) {
|
|
var data = x[i].substring(start, end);
|
|
var node = domCreateCDATASection(xmldoc, data);
|
|
domAppendChild(parent, node);
|
|
} else {
|
|
var data = x[i].substring(start);
|
|
text = null;
|
|
var node = domCreateCDATASection(xmldoc, data);
|
|
domAppendChild(parent, node);
|
|
parent = node;
|
|
stack.push(node);
|
|
slurp = ']]>';
|
|
}
|
|
|
|
} else if (tag.indexOf('!--') == 0) {
|
|
var start = '!--'.length;
|
|
var end = x[i].indexOf('-->');
|
|
if (end != -1) {
|
|
var data = x[i].substring(start, end);
|
|
var node = domCreateComment(xmldoc, data);
|
|
domAppendChild(parent, node);
|
|
} else {
|
|
var data = x[i].substring(start);
|
|
text = null;
|
|
var node = domCreateComment(xmldoc, data);
|
|
domAppendChild(parent, node);
|
|
parent = node;
|
|
stack.push(node);
|
|
slurp = '-->';
|
|
}
|
|
|
|
} else if (tag.charAt(0) == '/') {
|
|
stack.pop();
|
|
parent = stack[stack.length-1];
|
|
|
|
} else if (tag.charAt(0) == '?') {
|
|
// Ignore XML declaration and processing instructions
|
|
} else if (tag.charAt(0) == '!') {
|
|
// Ignore notation and comments
|
|
} else {
|
|
var empty = tag.match(regex_empty);
|
|
var tagname = regex_tagname.exec(tag)[1];
|
|
var node = domCreateElement(xmldoc, tagname);
|
|
|
|
var att;
|
|
while (att = regex_attribute.exec(tag)) {
|
|
var val = xmlResolveEntities(att[5] || att[7] || '');
|
|
domSetAttribute(node, att[1], val);
|
|
}
|
|
|
|
domAppendChild(parent, node);
|
|
if (!empty) {
|
|
parent = node;
|
|
stack.push(node);
|
|
}
|
|
}
|
|
|
|
if (text && parent != root) {
|
|
domAppendChild(parent, domCreateTextNode(xmldoc, text));
|
|
}
|
|
}
|
|
|
|
return root;
|
|
}
|
|
|
|
// Based on <http://www.w3.org/TR/2000/REC-DOM-Level-2-Core-20001113/
|
|
// core.html#ID-1950641247>
|
|
var DOM_ELEMENT_NODE = 1;
|
|
var DOM_ATTRIBUTE_NODE = 2;
|
|
var DOM_TEXT_NODE = 3;
|
|
var DOM_CDATA_SECTION_NODE = 4;
|
|
var DOM_ENTITY_REFERENCE_NODE = 5;
|
|
var DOM_ENTITY_NODE = 6;
|
|
var DOM_PROCESSING_INSTRUCTION_NODE = 7;
|
|
var DOM_COMMENT_NODE = 8;
|
|
var DOM_DOCUMENT_NODE = 9;
|
|
var DOM_DOCUMENT_TYPE_NODE = 10;
|
|
var DOM_DOCUMENT_FRAGMENT_NODE = 11;
|
|
var DOM_NOTATION_NODE = 12;
|
|
|
|
// Traverses the element nodes in the DOM section underneath the given
|
|
// node and invokes the given callbacks as methods on every element
|
|
// node encountered. Function opt_pre is invoked before a node's
|
|
// children are traversed; opt_post is invoked after they are
|
|
// traversed. Traversal will not be continued if a callback function
|
|
// returns boolean false. NOTE(mesch): copied from
|
|
// <//google3/maps/webmaps/javascript/dom.js>.
|
|
function domTraverseElements(node, opt_pre, opt_post) {
|
|
var ret;
|
|
if (opt_pre) {
|
|
ret = opt_pre.call(null, node);
|
|
if (typeof ret == 'boolean' && !ret) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
for (var c = node.firstChild; c; c = c.nextSibling) {
|
|
if (c.nodeType == DOM_ELEMENT_NODE) {
|
|
ret = arguments.callee.call(this, c, opt_pre, opt_post);
|
|
if (typeof ret == 'boolean' && !ret) {
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (opt_post) {
|
|
ret = opt_post.call(null, node);
|
|
if (typeof ret == 'boolean' && !ret) {
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Our W3C DOM Node implementation. Note we call it XNode because we
|
|
// can't define the identifier Node. We do this mostly for Opera,
|
|
// where we can't reuse the HTML DOM for parsing our own XML, and for
|
|
// Safari, where it is too expensive to have the template processor
|
|
// operate on native DOM nodes.
|
|
function XNode(type, name, opt_value, opt_owner) {
|
|
this.attributes = [];
|
|
this.childNodes = [];
|
|
|
|
XNode.init.call(this, type, name, opt_value, opt_owner);
|
|
}
|
|
|
|
// Don't call as method, use apply() or call().
|
|
XNode.init = function(type, name, value, owner) {
|
|
this.nodeType = type - 0;
|
|
this.nodeName = '' + name;
|
|
this.nodeValue = '' + value;
|
|
this.ownerDocument = owner;
|
|
|
|
this.firstChild = null;
|
|
this.lastChild = null;
|
|
this.nextSibling = null;
|
|
this.previousSibling = null;
|
|
this.parentNode = null;
|
|
}
|
|
|
|
XNode.unused_ = [];
|
|
|
|
XNode.recycle = function(node) {
|
|
if (!node) {
|
|
return;
|
|
}
|
|
|
|
if (node.constructor == XDocument) {
|
|
XNode.recycle(node.documentElement);
|
|
return;
|
|
}
|
|
|
|
if (node.constructor != this) {
|
|
return;
|
|
}
|
|
|
|
XNode.unused_.push(node);
|
|
for (var a = 0; a < node.attributes.length; ++a) {
|
|
XNode.recycle(node.attributes[a]);
|
|
}
|
|
for (var c = 0; c < node.childNodes.length; ++c) {
|
|
XNode.recycle(node.childNodes[c]);
|
|
}
|
|
node.attributes.length = 0;
|
|
node.childNodes.length = 0;
|
|
XNode.init.call(node, 0, '', '', null);
|
|
}
|
|
|
|
XNode.create = function(type, name, value, owner) {
|
|
if (XNode.unused_.length > 0) {
|
|
var node = XNode.unused_.pop();
|
|
XNode.init.call(node, type, name, value, owner);
|
|
return node;
|
|
} else {
|
|
return new XNode(type, name, value, owner);
|
|
}
|
|
}
|
|
|
|
XNode.prototype.appendChild = function(node) {
|
|
// firstChild
|
|
if (this.childNodes.length == 0) {
|
|
this.firstChild = node;
|
|
}
|
|
|
|
// previousSibling
|
|
node.previousSibling = this.lastChild;
|
|
|
|
// nextSibling
|
|
node.nextSibling = null;
|
|
if (this.lastChild) {
|
|
this.lastChild.nextSibling = node;
|
|
}
|
|
|
|
// parentNode
|
|
node.parentNode = this;
|
|
|
|
// lastChild
|
|
this.lastChild = node;
|
|
|
|
// childNodes
|
|
this.childNodes.push(node);
|
|
}
|
|
|
|
|
|
XNode.prototype.replaceChild = function(newNode, oldNode) {
|
|
if (oldNode == newNode) {
|
|
return;
|
|
}
|
|
|
|
for (var i = 0; i < this.childNodes.length; ++i) {
|
|
if (this.childNodes[i] == oldNode) {
|
|
this.childNodes[i] = newNode;
|
|
|
|
var p = oldNode.parentNode;
|
|
oldNode.parentNode = null;
|
|
newNode.parentNode = p;
|
|
|
|
p = oldNode.previousSibling;
|
|
oldNode.previousSibling = null;
|
|
newNode.previousSibling = p;
|
|
if (newNode.previousSibling) {
|
|
newNode.previousSibling.nextSibling = newNode;
|
|
}
|
|
|
|
p = oldNode.nextSibling;
|
|
oldNode.nextSibling = null;
|
|
newNode.nextSibling = p;
|
|
if (newNode.nextSibling) {
|
|
newNode.nextSibling.previousSibling = newNode;
|
|
}
|
|
|
|
if (this.firstChild == oldNode) {
|
|
this.firstChild = newNode;
|
|
}
|
|
|
|
if (this.lastChild == oldNode) {
|
|
this.lastChild = newNode;
|
|
}
|
|
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
XNode.prototype.insertBefore = function(newNode, oldNode) {
|
|
if (oldNode == newNode) {
|
|
return;
|
|
}
|
|
|
|
if (oldNode.parentNode != this) {
|
|
return;
|
|
}
|
|
|
|
if (newNode.parentNode) {
|
|
newNode.parentNode.removeChild(newNode);
|
|
}
|
|
|
|
var newChildren = [];
|
|
for (var i = 0; i < this.childNodes.length; ++i) {
|
|
var c = this.childNodes[i];
|
|
if (c == oldNode) {
|
|
newChildren.push(newNode);
|
|
|
|
newNode.parentNode = this;
|
|
|
|
newNode.previousSibling = oldNode.previousSibling;
|
|
oldNode.previousSibling = newNode;
|
|
if (newNode.previousSibling) {
|
|
newNode.previousSibling.nextSibling = newNode;
|
|
}
|
|
|
|
newNode.nextSibling = oldNode;
|
|
|
|
if (this.firstChild == oldNode) {
|
|
this.firstChild = newNode;
|
|
}
|
|
}
|
|
newChildren.push(c);
|
|
}
|
|
this.childNodes = newChildren;
|
|
}
|
|
|
|
|
|
XNode.prototype.removeChild = function(node) {
|
|
var newChildren = [];
|
|
for (var i = 0; i < this.childNodes.length; ++i) {
|
|
var c = this.childNodes[i];
|
|
if (c != node) {
|
|
newChildren.push(c);
|
|
} else {
|
|
if (c.previousSibling) {
|
|
c.previousSibling.nextSibling = c.nextSibling;
|
|
}
|
|
if (c.nextSibling) {
|
|
c.nextSibling.previousSibling = c.previousSibling;
|
|
}
|
|
if (this.firstChild == c) {
|
|
this.firstChild = c.nextSibling;
|
|
}
|
|
if (this.lastChild == c) {
|
|
this.lastChild = c.previousSibling;
|
|
}
|
|
}
|
|
}
|
|
this.childNodes = newChildren;
|
|
}
|
|
|
|
|
|
XNode.prototype.hasAttributes = function() {
|
|
return this.attributes.length > 0;
|
|
}
|
|
|
|
|
|
XNode.prototype.setAttribute = function(name, value) {
|
|
for (var i = 0; i < this.attributes.length; ++i) {
|
|
if (this.attributes[i].nodeName == name) {
|
|
this.attributes[i].nodeValue = '' + value;
|
|
return;
|
|
}
|
|
}
|
|
this.attributes.push(XNode.create(DOM_ATTRIBUTE_NODE, name, value, this));
|
|
}
|
|
|
|
|
|
XNode.prototype.getAttribute = function(name) {
|
|
for (var i = 0; i < this.attributes.length; ++i) {
|
|
if (this.attributes[i].nodeName == name) {
|
|
return this.attributes[i].nodeValue;
|
|
}
|
|
}
|
|
return null;
|
|
}
|
|
|
|
|
|
XNode.prototype.removeAttribute = function(name) {
|
|
var a = [];
|
|
for (var i = 0; i < this.attributes.length; ++i) {
|
|
if (this.attributes[i].nodeName != name) {
|
|
a.push(this.attributes[i]);
|
|
}
|
|
}
|
|
this.attributes = a;
|
|
}
|
|
|
|
|
|
XNode.prototype.getElementsByTagName = function(name) {
|
|
var ret = [];
|
|
domTraverseElements(this, function(node) {
|
|
if (node.nodeName == name) {
|
|
ret.push(node);
|
|
}
|
|
}, null);
|
|
return ret;
|
|
}
|
|
|
|
|
|
XNode.prototype.getElementById = function(id) {
|
|
var ret = null;
|
|
domTraverseElements(this, function(node) {
|
|
if (node.getAttribute('id') == id) {
|
|
ret = node;
|
|
return false;
|
|
}
|
|
}, null);
|
|
return ret;
|
|
}
|
|
|
|
|
|
function XDocument() {
|
|
// NOTE(mesch): Acocording to the DOM Spec, ownerDocument of a
|
|
// document node is null.
|
|
XNode.call(this, DOM_DOCUMENT_NODE, '#document', null, null);
|
|
this.documentElement = null;
|
|
}
|
|
|
|
XDocument.prototype = new XNode(DOM_DOCUMENT_NODE, '#document');
|
|
|
|
XDocument.prototype.clear = function() {
|
|
XNode.recycle(this.documentElement);
|
|
this.documentElement = null;
|
|
}
|
|
|
|
XDocument.prototype.appendChild = function(node) {
|
|
XNode.prototype.appendChild.call(this, node);
|
|
this.documentElement = this.childNodes[0];
|
|
}
|
|
|
|
XDocument.prototype.createElement = function(name) {
|
|
return XNode.create(DOM_ELEMENT_NODE, name, null, this);
|
|
}
|
|
|
|
XDocument.prototype.createDocumentFragment = function() {
|
|
return XNode.create(DOM_DOCUMENT_FRAGMENT_NODE, '#document-fragment',
|
|
null, this);
|
|
}
|
|
|
|
XDocument.prototype.createTextNode = function(value) {
|
|
return XNode.create(DOM_TEXT_NODE, '#text', value, this);
|
|
}
|
|
|
|
XDocument.prototype.createAttribute = function(name) {
|
|
return XNode.create(DOM_ATTRIBUTE_NODE, name, null, this);
|
|
}
|
|
|
|
XDocument.prototype.createComment = function(data) {
|
|
return XNode.create(DOM_COMMENT_NODE, '#comment', data, this);
|
|
}
|
|
|
|
XDocument.prototype.createCDATASection = function(data) {
|
|
return XNode.create(DOM_CDATA_SECTION_NODE, '#cdata-section', data, this);
|
|
}
|
|
|
|
|
|
// Copyright 2005 Google Inc.
|
|
// All Rights Reserved
|
|
//
|
|
// An XPath parser and evaluator written in JavaScript. The
|
|
// implementation is complete except for functions handling
|
|
// namespaces.
|
|
//
|
|
// Reference: [XPATH] XPath Specification
|
|
// <http://www.w3.org/TR/1999/REC-xpath-19991116>.
|
|
//
|
|
//
|
|
// The API of the parser has several parts:
|
|
//
|
|
// 1. The parser function xpathParse() that takes a string and returns
|
|
// an expession object.
|
|
//
|
|
// 2. The expression object that has an evaluate() method to evaluate the
|
|
// XPath expression it represents. (It is actually a hierarchy of
|
|
// objects that resembles the parse tree, but an application will call
|
|
// evaluate() only on the top node of this hierarchy.)
|
|
//
|
|
// 3. The context object that is passed as an argument to the evaluate()
|
|
// method, which represents the DOM context in which the expression is
|
|
// evaluated.
|
|
//
|
|
// 4. The value object that is returned from evaluate() and represents
|
|
// values of the different types that are defined by XPath (number,
|
|
// string, boolean, and node-set), and allows to convert between them.
|
|
//
|
|
// These parts are near the top of the file, the functions and data
|
|
// that are used internally follow after them.
|
|
//
|
|
//
|
|
// Author: Steffen Meschkat <mesch@google.com>
|
|
|
|
|
|
// The entry point for the parser.
|
|
//
|
|
// @param expr a string that contains an XPath expression.
|
|
// @return an expression object that can be evaluated with an
|
|
// expression context.
|
|
|
|
function xpathParse(expr) {
|
|
xpathLog('parse ' + expr);
|
|
xpathParseInit();
|
|
|
|
var cached = xpathCacheLookup(expr);
|
|
if (cached) {
|
|
xpathLog(' ... cached');
|
|
return cached;
|
|
}
|
|
|
|
// Optimize for a few common cases: simple attribute node tests
|
|
// (@id), simple element node tests (page), variable references
|
|
// ($address), numbers (4), multi-step path expressions where each
|
|
// step is a plain element node test
|
|
// (page/overlay/locations/location).
|
|
|
|
if (expr.match(/^(\$|@)?\w+$/i)) {
|
|
var ret = makeSimpleExpr(expr);
|
|
xpathParseCache[expr] = ret;
|
|
xpathLog(' ... simple');
|
|
return ret;
|
|
}
|
|
|
|
if (expr.match(/^\w+(\/\w+)*$/i)) {
|
|
var ret = makeSimpleExpr2(expr);
|
|
xpathParseCache[expr] = ret;
|
|
xpathLog(' ... simple 2');
|
|
return ret;
|
|
}
|
|
|
|
var cachekey = expr; // expr is modified during parse
|
|
|
|
var stack = [];
|
|
var ahead = null;
|
|
var previous = null;
|
|
var done = false;
|
|
|
|
var parse_count = 0;
|
|
var lexer_count = 0;
|
|
var reduce_count = 0;
|
|
|
|
while (!done) {
|
|
parse_count++;
|
|
expr = expr.replace(/^\s*/, '');
|
|
previous = ahead;
|
|
ahead = null;
|
|
|
|
var rule = null;
|
|
var match = '';
|
|
for (var i = 0; i < xpathTokenRules.length; ++i) {
|
|
var result = xpathTokenRules[i].re.exec(expr);
|
|
lexer_count++;
|
|
if (result && result.length > 0 && result[0].length > match.length) {
|
|
rule = xpathTokenRules[i];
|
|
match = result[0];
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Special case: allow operator keywords to be element and
|
|
// variable names.
|
|
|
|
// NOTE(mesch): The parser resolves conflicts by looking ahead,
|
|
// and this is the only case where we look back to
|
|
// disambiguate. So this is indeed something different, and
|
|
// looking back is usually done in the lexer (via states in the
|
|
// general case, called "start conditions" in flex(1)). Also,the
|
|
// conflict resolution in the parser is not as robust as it could
|
|
// be, so I'd like to keep as much off the parser as possible (all
|
|
// these precedence values should be computed from the grammar
|
|
// rules and possibly associativity declarations, as in bison(1),
|
|
// and not explicitly set.
|
|
|
|
if (rule &&
|
|
(rule == TOK_DIV ||
|
|
rule == TOK_MOD ||
|
|
rule == TOK_AND ||
|
|
rule == TOK_OR) &&
|
|
(!previous ||
|
|
previous.tag == TOK_AT ||
|
|
previous.tag == TOK_DSLASH ||
|
|
previous.tag == TOK_SLASH ||
|
|
previous.tag == TOK_AXIS ||
|
|
previous.tag == TOK_DOLLAR)) {
|
|
rule = TOK_QNAME;
|
|
}
|
|
|
|
if (rule) {
|
|
expr = expr.substr(match.length);
|
|
xpathLog('token: ' + match + ' -- ' + rule.label);
|
|
ahead = {
|
|
tag: rule,
|
|
match: match,
|
|
prec: rule.prec ? rule.prec : 0, // || 0 is removed by the compiler
|
|
expr: makeTokenExpr(match)
|
|
};
|
|
|
|
} else {
|
|
xpathLog('DONE');
|
|
done = true;
|
|
}
|
|
|
|
while (xpathReduce(stack, ahead)) {
|
|
reduce_count++;
|
|
xpathLog('stack: ' + stackToString(stack));
|
|
}
|
|
}
|
|
|
|
xpathLog('stack: ' + stackToString(stack));
|
|
|
|
if (stack.length != 1) {
|
|
throw 'XPath parse error ' + cachekey + ':\n' + stackToString(stack);
|
|
}
|
|
|
|
var result = stack[0].expr;
|
|
xpathParseCache[cachekey] = result;
|
|
|
|
xpathLog('XPath parse: ' + parse_count + ' / ' +
|
|
lexer_count + ' / ' + reduce_count);
|
|
|
|
return result;
|
|
}
|
|
|
|
var xpathParseCache = {};
|
|
|
|
function xpathCacheLookup(expr) {
|
|
return xpathParseCache[expr];
|
|
}
|
|
|
|
function xpathReduce(stack, ahead) {
|
|
var cand = null;
|
|
|
|
if (stack.length > 0) {
|
|
var top = stack[stack.length-1];
|
|
var ruleset = xpathRules[top.tag.key];
|
|
|
|
if (ruleset) {
|
|
for (var i = 0; i < ruleset.length; ++i) {
|
|
var rule = ruleset[i];
|
|
var match = xpathMatchStack(stack, rule[1]);
|
|
if (match.length) {
|
|
cand = {
|
|
tag: rule[0],
|
|
rule: rule,
|
|
match: match
|
|
};
|
|
cand.prec = xpathGrammarPrecedence(cand);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
var ret;
|
|
if (cand && (!ahead || cand.prec > ahead.prec ||
|
|
(ahead.tag.left && cand.prec >= ahead.prec))) {
|
|
for (var i = 0; i < cand.match.matchlength; ++i) {
|
|
stack.pop();
|
|
}
|
|
|
|
xpathLog('reduce ' + cand.tag.label + ' ' + cand.prec +
|
|
' ahead ' + (ahead ? ahead.tag.label + ' ' + ahead.prec +
|
|
(ahead.tag.left ? ' left' : '')
|
|
: ' none '));
|
|
|
|
var matchexpr = mapExpr(cand.match, function(m) { return m.expr; });
|
|
cand.expr = cand.rule[3].apply(null, matchexpr);
|
|
|
|
stack.push(cand);
|
|
ret = true;
|
|
|
|
} else {
|
|
if (ahead) {
|
|
xpathLog('shift ' + ahead.tag.label + ' ' + ahead.prec +
|
|
(ahead.tag.left ? ' left' : '') +
|
|
' over ' + (cand ? cand.tag.label + ' ' +
|
|
cand.prec : ' none'));
|
|
stack.push(ahead);
|
|
}
|
|
ret = false;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
function xpathMatchStack(stack, pattern) {
|
|
|
|
// NOTE(mesch): The stack matches for variable cardinality are
|
|
// greedy but don't do backtracking. This would be an issue only
|
|
// with rules of the form A* A, i.e. with an element with variable
|
|
// cardinality followed by the same element. Since that doesn't
|
|
// occur in the grammar at hand, all matches on the stack are
|
|
// unambiguous.
|
|
|
|
var S = stack.length;
|
|
var P = pattern.length;
|
|
var p, s;
|
|
var match = [];
|
|
match.matchlength = 0;
|
|
var ds = 0;
|
|
for (p = P - 1, s = S - 1; p >= 0 && s >= 0; --p, s -= ds) {
|
|
ds = 0;
|
|
var qmatch = [];
|
|
if (pattern[p] == Q_MM) {
|
|
p -= 1;
|
|
match.push(qmatch);
|
|
while (s - ds >= 0 && stack[s - ds].tag == pattern[p]) {
|
|
qmatch.push(stack[s - ds]);
|
|
ds += 1;
|
|
match.matchlength += 1;
|
|
}
|
|
|
|
} else if (pattern[p] == Q_01) {
|
|
p -= 1;
|
|
match.push(qmatch);
|
|
while (s - ds >= 0 && ds < 2 && stack[s - ds].tag == pattern[p]) {
|
|
qmatch.push(stack[s - ds]);
|
|
ds += 1;
|
|
match.matchlength += 1;
|
|
}
|
|
|
|
} else if (pattern[p] == Q_1M) {
|
|
p -= 1;
|
|
match.push(qmatch);
|
|
if (stack[s].tag == pattern[p]) {
|
|
while (s - ds >= 0 && stack[s - ds].tag == pattern[p]) {
|
|
qmatch.push(stack[s - ds]);
|
|
ds += 1;
|
|
match.matchlength += 1;
|
|
}
|
|
} else {
|
|
return [];
|
|
}
|
|
|
|
} else if (stack[s].tag == pattern[p]) {
|
|
match.push(stack[s]);
|
|
ds += 1;
|
|
match.matchlength += 1;
|
|
|
|
} else {
|
|
return [];
|
|
}
|
|
|
|
reverseInplace(qmatch);
|
|
qmatch.expr = mapExpr(qmatch, function(m) { return m.expr; });
|
|
}
|
|
|
|
reverseInplace(match);
|
|
|
|
if (p == -1) {
|
|
return match;
|
|
|
|
} else {
|
|
return [];
|
|
}
|
|
}
|
|
|
|
function xpathTokenPrecedence(tag) {
|
|
return tag.prec || 2;
|
|
}
|
|
|
|
function xpathGrammarPrecedence(frame) {
|
|
var ret = 0;
|
|
|
|
if (frame.rule) { /* normal reduce */
|
|
if (frame.rule.length >= 3 && frame.rule[2] >= 0) {
|
|
ret = frame.rule[2];
|
|
|
|
} else {
|
|
for (var i = 0; i < frame.rule[1].length; ++i) {
|
|
var p = xpathTokenPrecedence(frame.rule[1][i]);
|
|
ret = Math.max(ret, p);
|
|
}
|
|
}
|
|
} else if (frame.tag) { /* TOKEN match */
|
|
ret = xpathTokenPrecedence(frame.tag);
|
|
|
|
} else if (frame.length) { /* Q_ match */
|
|
for (var j = 0; j < frame.length; ++j) {
|
|
var p = xpathGrammarPrecedence(frame[j]);
|
|
ret = Math.max(ret, p);
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
function stackToString(stack) {
|
|
var ret = '';
|
|
for (var i = 0; i < stack.length; ++i) {
|
|
if (ret) {
|
|
ret += '\n';
|
|
}
|
|
ret += stack[i].tag.label;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
// XPath expression evaluation context. An XPath context consists of a
|
|
// DOM node, a list of DOM nodes that contains this node, a number
|
|
// that represents the position of the single node in the list, and a
|
|
// current set of variable bindings. (See XPath spec.)
|
|
//
|
|
// The interface of the expression context:
|
|
//
|
|
// Constructor -- gets the node, its position, the node set it
|
|
// belongs to, and a parent context as arguments. The parent context
|
|
// is used to implement scoping rules for variables: if a variable
|
|
// is not found in the current context, it is looked for in the
|
|
// parent context, recursively. Except for node, all arguments have
|
|
// default values: default position is 0, default node set is the
|
|
// set that contains only the node, and the default parent is null.
|
|
//
|
|
// Notice that position starts at 0 at the outside interface;
|
|
// inside XPath expressions this shows up as position()=1.
|
|
//
|
|
// clone() -- creates a new context with the current context as
|
|
// parent. If passed as argument to clone(), the new context has a
|
|
// different node, position, or node set. What is not passed is
|
|
// inherited from the cloned context.
|
|
//
|
|
// setVariable(name, expr) -- binds given XPath expression to the
|
|
// name.
|
|
//
|
|
// getVariable(name) -- what the name says.
|
|
//
|
|
// setNode(position) -- sets the context to the node at the given
|
|
// position. Needed to implement scoping rules for variables in
|
|
// XPath. (A variable is visible to all subsequent siblings, not
|
|
// only to its children.)
|
|
|
|
function ExprContext(node, opt_position, opt_nodelist, opt_parent) {
|
|
this.node = node;
|
|
this.position = opt_position || 0;
|
|
this.nodelist = opt_nodelist || [ node ];
|
|
this.variables = {};
|
|
this.parent = opt_parent || null;
|
|
if (opt_parent) {
|
|
this.root = opt_parent.root;
|
|
} else if (this.node.nodeType == DOM_DOCUMENT_NODE) {
|
|
// NOTE(mesch): DOM Spec stipulates that the ownerDocument of a
|
|
// document is null. Our root, however is the document that we are
|
|
// processing, so the initial context is created from its document
|
|
// node, which case we must handle here explcitly.
|
|
this.root = node;
|
|
} else {
|
|
this.root = node.ownerDocument;
|
|
}
|
|
}
|
|
|
|
ExprContext.prototype.clone = function(opt_node, opt_position, opt_nodelist) {
|
|
return new ExprContext(
|
|
opt_node || this.node,
|
|
typeof opt_position != 'undefined' ? opt_position : this.position,
|
|
opt_nodelist || this.nodelist, this);
|
|
};
|
|
|
|
ExprContext.prototype.setVariable = function(name, value) {
|
|
this.variables[name] = value;
|
|
};
|
|
|
|
ExprContext.prototype.getVariable = function(name) {
|
|
if (typeof this.variables[name] != 'undefined') {
|
|
return this.variables[name];
|
|
|
|
} else if (this.parent) {
|
|
return this.parent.getVariable(name);
|
|
|
|
} else {
|
|
return null;
|
|
}
|
|
};
|
|
|
|
ExprContext.prototype.setNode = function(position) {
|
|
this.node = this.nodelist[position];
|
|
this.position = position;
|
|
};
|
|
|
|
ExprContext.prototype.contextSize = function() {
|
|
return this.nodelist.length;
|
|
};
|
|
|
|
|
|
// XPath expression values. They are what XPath expressions evaluate
|
|
// to. Strangely, the different value types are not specified in the
|
|
// XPath syntax, but only in the semantics, so they don't show up as
|
|
// nonterminals in the grammar. Yet, some expressions are required to
|
|
// evaluate to particular types, and not every type can be coerced
|
|
// into every other type. Although the types of XPath values are
|
|
// similar to the types present in JavaScript, the type coercion rules
|
|
// are a bit peculiar, so we explicitly model XPath types instead of
|
|
// mapping them onto JavaScript types. (See XPath spec.)
|
|
//
|
|
// The four types are:
|
|
//
|
|
// StringValue
|
|
//
|
|
// NumberValue
|
|
//
|
|
// BooleanValue
|
|
//
|
|
// NodeSetValue
|
|
//
|
|
// The common interface of the value classes consists of methods that
|
|
// implement the XPath type coercion rules:
|
|
//
|
|
// stringValue() -- returns the value as a JavaScript String,
|
|
//
|
|
// numberValue() -- returns the value as a JavaScript Number,
|
|
//
|
|
// booleanValue() -- returns the value as a JavaScript Boolean,
|
|
//
|
|
// nodeSetValue() -- returns the value as a JavaScript Array of DOM
|
|
// Node objects.
|
|
//
|
|
|
|
function StringValue(value) {
|
|
this.value = value;
|
|
this.type = 'string';
|
|
}
|
|
|
|
StringValue.prototype.stringValue = function() {
|
|
return this.value;
|
|
}
|
|
|
|
StringValue.prototype.booleanValue = function() {
|
|
return this.value.length > 0;
|
|
}
|
|
|
|
StringValue.prototype.numberValue = function() {
|
|
return this.value - 0;
|
|
}
|
|
|
|
StringValue.prototype.nodeSetValue = function() {
|
|
throw this;
|
|
}
|
|
|
|
function BooleanValue(value) {
|
|
this.value = value;
|
|
this.type = 'boolean';
|
|
}
|
|
|
|
BooleanValue.prototype.stringValue = function() {
|
|
return '' + this.value;
|
|
}
|
|
|
|
BooleanValue.prototype.booleanValue = function() {
|
|
return this.value;
|
|
}
|
|
|
|
BooleanValue.prototype.numberValue = function() {
|
|
return this.value ? 1 : 0;
|
|
}
|
|
|
|
BooleanValue.prototype.nodeSetValue = function() {
|
|
throw this;
|
|
}
|
|
|
|
function NumberValue(value) {
|
|
this.value = value;
|
|
this.type = 'number';
|
|
}
|
|
|
|
NumberValue.prototype.stringValue = function() {
|
|
return '' + this.value;
|
|
}
|
|
|
|
NumberValue.prototype.booleanValue = function() {
|
|
return !!this.value;
|
|
}
|
|
|
|
NumberValue.prototype.numberValue = function() {
|
|
return this.value - 0;
|
|
}
|
|
|
|
NumberValue.prototype.nodeSetValue = function() {
|
|
throw this;
|
|
}
|
|
|
|
function NodeSetValue(value) {
|
|
this.value = value;
|
|
this.type = 'node-set';
|
|
}
|
|
|
|
NodeSetValue.prototype.stringValue = function() {
|
|
if (this.value.length == 0) {
|
|
return '';
|
|
} else {
|
|
return xmlValue(this.value[0]);
|
|
}
|
|
}
|
|
|
|
NodeSetValue.prototype.booleanValue = function() {
|
|
return this.value.length > 0;
|
|
}
|
|
|
|
NodeSetValue.prototype.numberValue = function() {
|
|
return this.stringValue() - 0;
|
|
}
|
|
|
|
NodeSetValue.prototype.nodeSetValue = function() {
|
|
return this.value;
|
|
};
|
|
|
|
// XPath expressions. They are used as nodes in the parse tree and
|
|
// possess an evaluate() method to compute an XPath value given an XPath
|
|
// context. Expressions are returned from the parser. Teh set of
|
|
// expression classes closely mirrors the set of non terminal symbols
|
|
// in the grammar. Every non trivial nonterminal symbol has a
|
|
// corresponding expression class.
|
|
//
|
|
// The common expression interface consists of the following methods:
|
|
//
|
|
// evaluate(context) -- evaluates the expression, returns a value.
|
|
//
|
|
// toString() -- returns the XPath text representation of the
|
|
// expression (defined in xsltdebug.js).
|
|
//
|
|
// parseTree(indent) -- returns a parse tree representation of the
|
|
// expression (defined in xsltdebug.js).
|
|
|
|
function TokenExpr(m) {
|
|
this.value = m;
|
|
}
|
|
|
|
TokenExpr.prototype.evaluate = function() {
|
|
return new StringValue(this.value);
|
|
};
|
|
|
|
function LocationExpr() {
|
|
this.absolute = false;
|
|
this.steps = [];
|
|
}
|
|
|
|
LocationExpr.prototype.appendStep = function(s) {
|
|
this.steps.push(s);
|
|
}
|
|
|
|
LocationExpr.prototype.prependStep = function(s) {
|
|
var steps0 = this.steps;
|
|
this.steps = [ s ];
|
|
for (var i = 0; i < steps0.length; ++i) {
|
|
this.steps.push(steps0[i]);
|
|
}
|
|
};
|
|
|
|
LocationExpr.prototype.evaluate = function(ctx) {
|
|
var start;
|
|
if (this.absolute) {
|
|
start = ctx.root;
|
|
|
|
} else {
|
|
start = ctx.node;
|
|
}
|
|
|
|
var nodes = [];
|
|
xPathStep(nodes, this.steps, 0, start, ctx);
|
|
return new NodeSetValue(nodes);
|
|
};
|
|
|
|
function xPathStep(nodes, steps, step, input, ctx) {
|
|
var s = steps[step];
|
|
var ctx2 = ctx.clone(input);
|
|
var nodelist = s.evaluate(ctx2).nodeSetValue();
|
|
|
|
for (var i = 0; i < nodelist.length; ++i) {
|
|
if (step == steps.length - 1) {
|
|
nodes.push(nodelist[i]);
|
|
} else {
|
|
xPathStep(nodes, steps, step + 1, nodelist[i], ctx);
|
|
}
|
|
}
|
|
}
|
|
|
|
function StepExpr(axis, nodetest, opt_predicate) {
|
|
this.axis = axis;
|
|
this.nodetest = nodetest;
|
|
this.predicate = opt_predicate || [];
|
|
}
|
|
|
|
StepExpr.prototype.appendPredicate = function(p) {
|
|
this.predicate.push(p);
|
|
}
|
|
|
|
StepExpr.prototype.evaluate = function(ctx) {
|
|
var input = ctx.node;
|
|
var nodelist = [];
|
|
|
|
// NOTE(mesch): When this was a switch() statement, it didn't work
|
|
// in Safari/2.0. Not sure why though; it resulted in the JavaScript
|
|
// console output "undefined" (without any line number or so).
|
|
|
|
if (this.axis == xpathAxis.ANCESTOR_OR_SELF) {
|
|
nodelist.push(input);
|
|
for (var n = input.parentNode; n; n = n.parentNode) {
|
|
nodelist.push(n);
|
|
}
|
|
|
|
} else if (this.axis == xpathAxis.ANCESTOR) {
|
|
for (var n = input.parentNode; n; n = n.parentNode) {
|
|
nodelist.push(n);
|
|
}
|
|
|
|
} else if (this.axis == xpathAxis.ATTRIBUTE) {
|
|
copyArray(nodelist, input.attributes);
|
|
|
|
} else if (this.axis == xpathAxis.CHILD) {
|
|
copyArray(nodelist, input.childNodes);
|
|
|
|
} else if (this.axis == xpathAxis.DESCENDANT_OR_SELF) {
|
|
nodelist.push(input);
|
|
xpathCollectDescendants(nodelist, input);
|
|
|
|
} else if (this.axis == xpathAxis.DESCENDANT) {
|
|
xpathCollectDescendants(nodelist, input);
|
|
|
|
} else if (this.axis == xpathAxis.FOLLOWING) {
|
|
for (var n = input; n; n = n.parentNode) {
|
|
for (var nn = n.nextSibling; nn; nn = nn.nextSibling) {
|
|
nodelist.push(nn);
|
|
xpathCollectDescendants(nodelist, nn);
|
|
}
|
|
}
|
|
|
|
} else if (this.axis == xpathAxis.FOLLOWING_SIBLING) {
|
|
for (var n = input.nextSibling; n; n = n.nextSibling) {
|
|
nodelist.push(n);
|
|
}
|
|
|
|
} else if (this.axis == xpathAxis.NAMESPACE) {
|
|
alert('not implemented: axis namespace');
|
|
|
|
} else if (this.axis == xpathAxis.PARENT) {
|
|
if (input.parentNode) {
|
|
nodelist.push(input.parentNode);
|
|
}
|
|
|
|
} else if (this.axis == xpathAxis.PRECEDING) {
|
|
for (var n = input; n; n = n.parentNode) {
|
|
for (var nn = n.previousSibling; nn; nn = nn.previousSibling) {
|
|
nodelist.push(nn);
|
|
xpathCollectDescendantsReverse(nodelist, nn);
|
|
}
|
|
}
|
|
|
|
} else if (this.axis == xpathAxis.PRECEDING_SIBLING) {
|
|
for (var n = input.previousSibling; n; n = n.previousSibling) {
|
|
nodelist.push(n);
|
|
}
|
|
|
|
} else if (this.axis == xpathAxis.SELF) {
|
|
nodelist.push(input);
|
|
|
|
} else {
|
|
throw 'ERROR -- NO SUCH AXIS: ' + this.axis;
|
|
}
|
|
|
|
// process node test
|
|
var nodelist0 = nodelist;
|
|
nodelist = [];
|
|
for (var i = 0; i < nodelist0.length; ++i) {
|
|
var n = nodelist0[i];
|
|
if (this.nodetest.evaluate(ctx.clone(n, i, nodelist0)).booleanValue()) {
|
|
nodelist.push(n);
|
|
}
|
|
}
|
|
|
|
// process predicates
|
|
for (var i = 0; i < this.predicate.length; ++i) {
|
|
var nodelist0 = nodelist;
|
|
nodelist = [];
|
|
for (var ii = 0; ii < nodelist0.length; ++ii) {
|
|
var n = nodelist0[ii];
|
|
if (this.predicate[i].evaluate(ctx.clone(n, ii, nodelist0)).booleanValue()) {
|
|
nodelist.push(n);
|
|
}
|
|
}
|
|
}
|
|
|
|
return new NodeSetValue(nodelist);
|
|
};
|
|
|
|
function NodeTestAny() {
|
|
this.value = new BooleanValue(true);
|
|
}
|
|
|
|
NodeTestAny.prototype.evaluate = function(ctx) {
|
|
return this.value;
|
|
};
|
|
|
|
function NodeTestElementOrAttribute() {}
|
|
|
|
NodeTestElementOrAttribute.prototype.evaluate = function(ctx) {
|
|
return new BooleanValue(
|
|
ctx.node.nodeType == DOM_ELEMENT_NODE ||
|
|
ctx.node.nodeType == DOM_ATTRIBUTE_NODE);
|
|
}
|
|
|
|
function NodeTestText() {}
|
|
|
|
NodeTestText.prototype.evaluate = function(ctx) {
|
|
return new BooleanValue(ctx.node.nodeType == DOM_TEXT_NODE);
|
|
}
|
|
|
|
function NodeTestComment() {}
|
|
|
|
NodeTestComment.prototype.evaluate = function(ctx) {
|
|
return new BooleanValue(ctx.node.nodeType == DOM_COMMENT_NODE);
|
|
}
|
|
|
|
function NodeTestPI(target) {
|
|
this.target = target;
|
|
}
|
|
|
|
NodeTestPI.prototype.evaluate = function(ctx) {
|
|
return new
|
|
BooleanValue(ctx.node.nodeType == DOM_PROCESSING_INSTRUCTION_NODE &&
|
|
(!this.target || ctx.node.nodeName == this.target));
|
|
}
|
|
|
|
function NodeTestNC(nsprefix) {
|
|
this.regex = new RegExp("^" + nsprefix + ":");
|
|
this.nsprefix = nsprefix;
|
|
}
|
|
|
|
NodeTestNC.prototype.evaluate = function(ctx) {
|
|
var n = ctx.node;
|
|
return new BooleanValue(this.regex.match(n.nodeName));
|
|
}
|
|
|
|
function NodeTestName(name) {
|
|
this.name = name;
|
|
}
|
|
|
|
NodeTestName.prototype.evaluate = function(ctx) {
|
|
var n = ctx.node;
|
|
return new BooleanValue(n.nodeName == this.name);
|
|
}
|
|
|
|
function PredicateExpr(expr) {
|
|
this.expr = expr;
|
|
}
|
|
|
|
PredicateExpr.prototype.evaluate = function(ctx) {
|
|
var v = this.expr.evaluate(ctx);
|
|
if (v.type == 'number') {
|
|
// NOTE(mesch): Internally, position is represented starting with
|
|
// 0, however in XPath position starts with 1. See functions
|
|
// position() and last().
|
|
return new BooleanValue(ctx.position == v.numberValue() - 1);
|
|
} else {
|
|
return new BooleanValue(v.booleanValue());
|
|
}
|
|
};
|
|
|
|
function FunctionCallExpr(name) {
|
|
this.name = name;
|
|
this.args = [];
|
|
}
|
|
|
|
FunctionCallExpr.prototype.appendArg = function(arg) {
|
|
this.args.push(arg);
|
|
};
|
|
|
|
FunctionCallExpr.prototype.evaluate = function(ctx) {
|
|
var fn = '' + this.name.value;
|
|
var f = this.xpathfunctions[fn];
|
|
if (f) {
|
|
return f.call(this, ctx);
|
|
} else {
|
|
xpathLog('XPath NO SUCH FUNCTION ' + fn);
|
|
return new BooleanValue(false);
|
|
}
|
|
};
|
|
|
|
FunctionCallExpr.prototype.xpathfunctions = {
|
|
'last': function(ctx) {
|
|
assert(this.args.length == 0);
|
|
// NOTE(mesch): XPath position starts at 1.
|
|
return new NumberValue(ctx.contextSize());
|
|
},
|
|
|
|
'position': function(ctx) {
|
|
assert(this.args.length == 0);
|
|
// NOTE(mesch): XPath position starts at 1.
|
|
return new NumberValue(ctx.position + 1);
|
|
},
|
|
|
|
'count': function(ctx) {
|
|
assert(this.args.length == 1);
|
|
var v = this.args[0].evaluate(ctx);
|
|
return new NumberValue(v.nodeSetValue().length);
|
|
},
|
|
|
|
'id': function(ctx) {
|
|
assert(this.args.length == 1);
|
|
var e = this.args[0].evaluate(ctx);
|
|
var ret = [];
|
|
var ids;
|
|
if (e.type == 'node-set') {
|
|
ids = [];
|
|
var en = e.nodeSetValue();
|
|
for (var i = 0; i < en.length; ++i) {
|
|
var v = xmlValue(en[i]).split(/\s+/);
|
|
for (var ii = 0; ii < v.length; ++ii) {
|
|
ids.push(v[ii]);
|
|
}
|
|
}
|
|
} else {
|
|
ids = e.stringValue().split(/\s+/);
|
|
}
|
|
var d = ctx.node.ownerDocument;
|
|
for (var i = 0; i < ids.length; ++i) {
|
|
var n = d.getElementById(ids[i]);
|
|
if (n) {
|
|
ret.push(n);
|
|
}
|
|
}
|
|
return new NodeSetValue(ret);
|
|
},
|
|
|
|
'local-name': function(ctx) {
|
|
alert('not implmented yet: XPath function local-name()');
|
|
},
|
|
|
|
'namespace-uri': function(ctx) {
|
|
alert('not implmented yet: XPath function namespace-uri()');
|
|
},
|
|
|
|
'name': function(ctx) {
|
|
assert(this.args.length == 1 || this.args.length == 0);
|
|
var n;
|
|
if (this.args.length == 0) {
|
|
n = [ ctx.node ];
|
|
} else {
|
|
n = this.args[0].evaluate(ctx).nodeSetValue();
|
|
}
|
|
|
|
if (n.length == 0) {
|
|
return new StringValue('');
|
|
} else {
|
|
return new StringValue(n[0].nodeName);
|
|
}
|
|
},
|
|
|
|
'string': function(ctx) {
|
|
assert(this.args.length == 1 || this.args.length == 0);
|
|
if (this.args.length == 0) {
|
|
return new StringValue(new NodeSetValue([ ctx.node ]).stringValue());
|
|
} else {
|
|
return new StringValue(this.args[0].evaluate(ctx).stringValue());
|
|
}
|
|
},
|
|
|
|
'concat': function(ctx) {
|
|
var ret = '';
|
|
for (var i = 0; i < this.args.length; ++i) {
|
|
ret += this.args[i].evaluate(ctx).stringValue();
|
|
}
|
|
return new StringValue(ret);
|
|
},
|
|
|
|
'starts-with': function(ctx) {
|
|
assert(this.args.length == 2);
|
|
var s0 = this.args[0].evaluate(ctx).stringValue();
|
|
var s1 = this.args[1].evaluate(ctx).stringValue();
|
|
return new BooleanValue(s0.indexOf(s1) == 0);
|
|
},
|
|
|
|
'contains': function(ctx) {
|
|
assert(this.args.length == 2);
|
|
var s0 = this.args[0].evaluate(ctx).stringValue();
|
|
var s1 = this.args[1].evaluate(ctx).stringValue();
|
|
return new BooleanValue(s0.indexOf(s1) != -1);
|
|
},
|
|
|
|
'substring-before': function(ctx) {
|
|
assert(this.args.length == 2);
|
|
var s0 = this.args[0].evaluate(ctx).stringValue();
|
|
var s1 = this.args[1].evaluate(ctx).stringValue();
|
|
var i = s0.indexOf(s1);
|
|
var ret;
|
|
if (i == -1) {
|
|
ret = '';
|
|
} else {
|
|
ret = s0.substr(0,i);
|
|
}
|
|
return new StringValue(ret);
|
|
},
|
|
|
|
'substring-after': function(ctx) {
|
|
assert(this.args.length == 2);
|
|
var s0 = this.args[0].evaluate(ctx).stringValue();
|
|
var s1 = this.args[1].evaluate(ctx).stringValue();
|
|
var i = s0.indexOf(s1);
|
|
var ret;
|
|
if (i == -1) {
|
|
ret = '';
|
|
} else {
|
|
ret = s0.substr(i + s1.length);
|
|
}
|
|
return new StringValue(ret);
|
|
},
|
|
|
|
'substring': function(ctx) {
|
|
// NOTE: XPath defines the position of the first character in a
|
|
// string to be 1, in JavaScript this is 0 ([XPATH] Section 4.2).
|
|
assert(this.args.length == 2 || this.args.length == 3);
|
|
var s0 = this.args[0].evaluate(ctx).stringValue();
|
|
var s1 = this.args[1].evaluate(ctx).numberValue();
|
|
var ret;
|
|
if (this.args.length == 2) {
|
|
var i1 = Math.max(0, Math.round(s1) - 1);
|
|
ret = s0.substr(i1);
|
|
|
|
} else {
|
|
var s2 = this.args[2].evaluate(ctx).numberValue();
|
|
var i0 = Math.round(s1) - 1;
|
|
var i1 = Math.max(0, i0);
|
|
var i2 = Math.round(s2) - Math.max(0, -i0);
|
|
ret = s0.substr(i1, i2);
|
|
}
|
|
return new StringValue(ret);
|
|
},
|
|
|
|
'string-length': function(ctx) {
|
|
var s;
|
|
if (this.args.length > 0) {
|
|
s = this.args[0].evaluate(ctx).stringValue();
|
|
} else {
|
|
s = new NodeSetValue([ ctx.node ]).stringValue();
|
|
}
|
|
return new NumberValue(s.length);
|
|
},
|
|
|
|
'normalize-space': function(ctx) {
|
|
var s;
|
|
if (this.args.length > 0) {
|
|
s = this.args[0].evaluate(ctx).stringValue();
|
|
} else {
|
|
s = new NodeSetValue([ ctx.node ]).stringValue();
|
|
}
|
|
s = s.replace(/^\s*/,'').replace(/\s*$/,'').replace(/\s+/g, ' ');
|
|
return new StringValue(s);
|
|
},
|
|
|
|
'translate': function(ctx) {
|
|
assert(this.args.length == 3);
|
|
var s0 = this.args[0].evaluate(ctx).stringValue();
|
|
var s1 = this.args[1].evaluate(ctx).stringValue();
|
|
var s2 = this.args[2].evaluate(ctx).stringValue();
|
|
|
|
for (var i = 0; i < s1.length; ++i) {
|
|
s0 = s0.replace(new RegExp(s1.charAt(i), 'g'), s2.charAt(i));
|
|
}
|
|
return new StringValue(s0);
|
|
},
|
|
|
|
'boolean': function(ctx) {
|
|
assert(this.args.length == 1);
|
|
return new BooleanValue(this.args[0].evaluate(ctx).booleanValue());
|
|
},
|
|
|
|
'not': function(ctx) {
|
|
assert(this.args.length == 1);
|
|
var ret = !this.args[0].evaluate(ctx).booleanValue();
|
|
return new BooleanValue(ret);
|
|
},
|
|
|
|
'true': function(ctx) {
|
|
assert(this.args.length == 0);
|
|
return new BooleanValue(true);
|
|
},
|
|
|
|
'false': function(ctx) {
|
|
assert(this.args.length == 0);
|
|
return new BooleanValue(false);
|
|
},
|
|
|
|
'lang': function(ctx) {
|
|
assert(this.args.length == 1);
|
|
var lang = this.args[0].evaluate(ctx).stringValue();
|
|
var xmllang;
|
|
var n = ctx.node;
|
|
while (n && n != n.parentNode /* just in case ... */) {
|
|
xmllang = n.getAttribute('xml:lang');
|
|
if (xmllang) {
|
|
break;
|
|
}
|
|
n = n.parentNode;
|
|
}
|
|
if (!xmllang) {
|
|
return new BooleanValue(false);
|
|
} else {
|
|
var re = new RegExp('^' + lang + '$', 'i');
|
|
return new BooleanValue(xmllang.match(re) ||
|
|
xmllang.replace(/_.*$/,'').match(re));
|
|
}
|
|
},
|
|
|
|
'number': function(ctx) {
|
|
assert(this.args.length == 1 || this.args.length == 0);
|
|
|
|
if (this.args.length == 1) {
|
|
return new NumberValue(this.args[0].evaluate(ctx).numberValue());
|
|
} else {
|
|
return new NumberValue(new NodeSetValue([ ctx.node ]).numberValue());
|
|
}
|
|
},
|
|
|
|
'sum': function(ctx) {
|
|
assert(this.args.length == 1);
|
|
var n = this.args[0].evaluate(ctx).nodeSetValue();
|
|
var sum = 0;
|
|
for (var i = 0; i < n.length; ++i) {
|
|
sum += xmlValue(n[i]) - 0;
|
|
}
|
|
return new NumberValue(sum);
|
|
},
|
|
|
|
'floor': function(ctx) {
|
|
assert(this.args.length == 1);
|
|
var num = this.args[0].evaluate(ctx).numberValue();
|
|
return new NumberValue(Math.floor(num));
|
|
},
|
|
|
|
'ceiling': function(ctx) {
|
|
assert(this.args.length == 1);
|
|
var num = this.args[0].evaluate(ctx).numberValue();
|
|
return new NumberValue(Math.ceil(num));
|
|
},
|
|
|
|
'round': function(ctx) {
|
|
assert(this.args.length == 1);
|
|
var num = this.args[0].evaluate(ctx).numberValue();
|
|
return new NumberValue(Math.round(num));
|
|
},
|
|
|
|
// TODO(mesch): The following functions are custom. There is a
|
|
// standard that defines how to add functions, which should be
|
|
// applied here.
|
|
|
|
'ext-join': function(ctx) {
|
|
assert(this.args.length == 2);
|
|
var nodes = this.args[0].evaluate(ctx).nodeSetValue();
|
|
var delim = this.args[1].evaluate(ctx).stringValue();
|
|
var ret = '';
|
|
for (var i = 0; i < nodes.length; ++i) {
|
|
if (ret) {
|
|
ret += delim;
|
|
}
|
|
ret += xmlValue(nodes[i]);
|
|
}
|
|
return new StringValue(ret);
|
|
},
|
|
|
|
// ext-if() evaluates and returns its second argument, if the
|
|
// boolean value of its first argument is true, otherwise it
|
|
// evaluates and returns its third argument.
|
|
|
|
'ext-if': function(ctx) {
|
|
assert(this.args.length == 3);
|
|
if (this.args[0].evaluate(ctx).booleanValue()) {
|
|
return this.args[1].evaluate(ctx);
|
|
} else {
|
|
return this.args[2].evaluate(ctx);
|
|
}
|
|
},
|
|
|
|
// ext-cardinal() evaluates its single argument as a number, and
|
|
// returns the current node that many times. It can be used in the
|
|
// select attribute to iterate over an integer range.
|
|
|
|
'ext-cardinal': function(ctx) {
|
|
assert(this.args.length >= 1);
|
|
var c = this.args[0].evaluate(ctx).numberValue();
|
|
var ret = [];
|
|
for (var i = 0; i < c; ++i) {
|
|
ret.push(ctx.node);
|
|
}
|
|
return new NodeSetValue(ret);
|
|
}
|
|
};
|
|
|
|
function UnionExpr(expr1, expr2) {
|
|
this.expr1 = expr1;
|
|
this.expr2 = expr2;
|
|
}
|
|
|
|
UnionExpr.prototype.evaluate = function(ctx) {
|
|
var nodes1 = this.expr1.evaluate(ctx).nodeSetValue();
|
|
var nodes2 = this.expr2.evaluate(ctx).nodeSetValue();
|
|
var I1 = nodes1.length;
|
|
for (var i2 = 0; i2 < nodes2.length; ++i2) {
|
|
var n = nodes2[i2];
|
|
var inBoth = false;
|
|
for (var i1 = 0; i1 < I1; ++i1) {
|
|
if (nodes1[i1] == n) {
|
|
inBoth = true;
|
|
i1 = I1; // break inner loop
|
|
}
|
|
}
|
|
if (!inBoth) {
|
|
nodes1.push(n);
|
|
}
|
|
}
|
|
return new NodeSetValue(nodes1);
|
|
};
|
|
|
|
function PathExpr(filter, rel) {
|
|
this.filter = filter;
|
|
this.rel = rel;
|
|
}
|
|
|
|
PathExpr.prototype.evaluate = function(ctx) {
|
|
var nodes = this.filter.evaluate(ctx).nodeSetValue();
|
|
var nodes1 = [];
|
|
for (var i = 0; i < nodes.length; ++i) {
|
|
var nodes0 = this.rel.evaluate(ctx.clone(nodes[i], i, nodes)).nodeSetValue();
|
|
for (var ii = 0; ii < nodes0.length; ++ii) {
|
|
nodes1.push(nodes0[ii]);
|
|
}
|
|
}
|
|
return new NodeSetValue(nodes1);
|
|
};
|
|
|
|
function FilterExpr(expr, predicate) {
|
|
this.expr = expr;
|
|
this.predicate = predicate;
|
|
}
|
|
|
|
FilterExpr.prototype.evaluate = function(ctx) {
|
|
var nodes = this.expr.evaluate(ctx).nodeSetValue();
|
|
for (var i = 0; i < this.predicate.length; ++i) {
|
|
var nodes0 = nodes;
|
|
nodes = [];
|
|
for (var j = 0; j < nodes0.length; ++j) {
|
|
var n = nodes0[j];
|
|
if (this.predicate[i].evaluate(ctx.clone(n, j, nodes0)).booleanValue()) {
|
|
nodes.push(n);
|
|
}
|
|
}
|
|
}
|
|
|
|
return new NodeSetValue(nodes);
|
|
}
|
|
|
|
function UnaryMinusExpr(expr) {
|
|
this.expr = expr;
|
|
}
|
|
|
|
UnaryMinusExpr.prototype.evaluate = function(ctx) {
|
|
return new NumberValue(-this.expr.evaluate(ctx).numberValue());
|
|
};
|
|
|
|
function BinaryExpr(expr1, op, expr2) {
|
|
this.expr1 = expr1;
|
|
this.expr2 = expr2;
|
|
this.op = op;
|
|
}
|
|
|
|
BinaryExpr.prototype.evaluate = function(ctx) {
|
|
var ret;
|
|
switch (this.op.value) {
|
|
case 'or':
|
|
ret = new BooleanValue(this.expr1.evaluate(ctx).booleanValue() ||
|
|
this.expr2.evaluate(ctx).booleanValue());
|
|
break;
|
|
|
|
case 'and':
|
|
ret = new BooleanValue(this.expr1.evaluate(ctx).booleanValue() &&
|
|
this.expr2.evaluate(ctx).booleanValue());
|
|
break;
|
|
|
|
case '+':
|
|
ret = new NumberValue(this.expr1.evaluate(ctx).numberValue() +
|
|
this.expr2.evaluate(ctx).numberValue());
|
|
break;
|
|
|
|
case '-':
|
|
ret = new NumberValue(this.expr1.evaluate(ctx).numberValue() -
|
|
this.expr2.evaluate(ctx).numberValue());
|
|
break;
|
|
|
|
case '*':
|
|
ret = new NumberValue(this.expr1.evaluate(ctx).numberValue() *
|
|
this.expr2.evaluate(ctx).numberValue());
|
|
break;
|
|
|
|
case 'mod':
|
|
ret = new NumberValue(this.expr1.evaluate(ctx).numberValue() %
|
|
this.expr2.evaluate(ctx).numberValue());
|
|
break;
|
|
|
|
case 'div':
|
|
ret = new NumberValue(this.expr1.evaluate(ctx).numberValue() /
|
|
this.expr2.evaluate(ctx).numberValue());
|
|
break;
|
|
|
|
case '=':
|
|
ret = this.compare(ctx, function(x1, x2) { return x1 == x2; });
|
|
break;
|
|
|
|
case '!=':
|
|
ret = this.compare(ctx, function(x1, x2) { return x1 != x2; });
|
|
break;
|
|
|
|
case '<':
|
|
ret = this.compare(ctx, function(x1, x2) { return x1 < x2; });
|
|
break;
|
|
|
|
case '<=':
|
|
ret = this.compare(ctx, function(x1, x2) { return x1 <= x2; });
|
|
break;
|
|
|
|
case '>':
|
|
ret = this.compare(ctx, function(x1, x2) { return x1 > x2; });
|
|
break;
|
|
|
|
case '>=':
|
|
ret = this.compare(ctx, function(x1, x2) { return x1 >= x2; });
|
|
break;
|
|
|
|
default:
|
|
alert('BinaryExpr.evaluate: ' + this.op.value);
|
|
}
|
|
return ret;
|
|
};
|
|
|
|
BinaryExpr.prototype.compare = function(ctx, cmp) {
|
|
var v1 = this.expr1.evaluate(ctx);
|
|
var v2 = this.expr2.evaluate(ctx);
|
|
|
|
var ret;
|
|
if (v1.type == 'node-set' && v2.type == 'node-set') {
|
|
var n1 = v1.nodeSetValue();
|
|
var n2 = v2.nodeSetValue();
|
|
ret = false;
|
|
for (var i1 = 0; i1 < n1.length; ++i1) {
|
|
for (var i2 = 0; i2 < n2.length; ++i2) {
|
|
if (cmp(xmlValue(n1[i1]), xmlValue(n2[i2]))) {
|
|
ret = true;
|
|
// Break outer loop. Labels confuse the jscompiler and we
|
|
// don't use them.
|
|
i2 = n2.length;
|
|
i1 = n1.length;
|
|
}
|
|
}
|
|
}
|
|
|
|
} else if (v1.type == 'node-set' || v2.type == 'node-set') {
|
|
|
|
if (v1.type == 'number') {
|
|
var s = v1.numberValue();
|
|
var n = v2.nodeSetValue();
|
|
|
|
ret = false;
|
|
for (var i = 0; i < n.length; ++i) {
|
|
var nn = xmlValue(n[i]) - 0;
|
|
if (cmp(s, nn)) {
|
|
ret = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
} else if (v2.type == 'number') {
|
|
var n = v1.nodeSetValue();
|
|
var s = v2.numberValue();
|
|
|
|
ret = false;
|
|
for (var i = 0; i < n.length; ++i) {
|
|
var nn = xmlValue(n[i]) - 0;
|
|
if (cmp(nn, s)) {
|
|
ret = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
} else if (v1.type == 'string') {
|
|
var s = v1.stringValue();
|
|
var n = v2.nodeSetValue();
|
|
|
|
ret = false;
|
|
for (var i = 0; i < n.length; ++i) {
|
|
var nn = xmlValue(n[i]);
|
|
if (cmp(s, nn)) {
|
|
ret = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
} else if (v2.type == 'string') {
|
|
var n = v1.nodeSetValue();
|
|
var s = v2.stringValue();
|
|
|
|
ret = false;
|
|
for (var i = 0; i < n.length; ++i) {
|
|
var nn = xmlValue(n[i]);
|
|
if (cmp(nn, s)) {
|
|
ret = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
} else {
|
|
ret = cmp(v1.booleanValue(), v2.booleanValue());
|
|
}
|
|
|
|
} else if (v1.type == 'boolean' || v2.type == 'boolean') {
|
|
ret = cmp(v1.booleanValue(), v2.booleanValue());
|
|
|
|
} else if (v1.type == 'number' || v2.type == 'number') {
|
|
ret = cmp(v1.numberValue(), v2.numberValue());
|
|
|
|
} else {
|
|
ret = cmp(v1.stringValue(), v2.stringValue());
|
|
}
|
|
|
|
return new BooleanValue(ret);
|
|
}
|
|
|
|
function LiteralExpr(value) {
|
|
this.value = value;
|
|
}
|
|
|
|
LiteralExpr.prototype.evaluate = function(ctx) {
|
|
return new StringValue(this.value);
|
|
};
|
|
|
|
function NumberExpr(value) {
|
|
this.value = value;
|
|
}
|
|
|
|
NumberExpr.prototype.evaluate = function(ctx) {
|
|
return new NumberValue(this.value);
|
|
};
|
|
|
|
function VariableExpr(name) {
|
|
this.name = name;
|
|
}
|
|
|
|
VariableExpr.prototype.evaluate = function(ctx) {
|
|
return ctx.getVariable(this.name);
|
|
}
|
|
|
|
// Factory functions for semantic values (i.e. Expressions) of the
|
|
// productions in the grammar. When a production is matched to reduce
|
|
// the current parse state stack, the function is called with the
|
|
// semantic values of the matched elements as arguments, and returns
|
|
// another semantic value. The semantic value is a node of the parse
|
|
// tree, an expression object with an evaluate() method that evaluates the
|
|
// expression in an actual context. These factory functions are used
|
|
// in the specification of the grammar rules, below.
|
|
|
|
function makeTokenExpr(m) {
|
|
return new TokenExpr(m);
|
|
}
|
|
|
|
function passExpr(e) {
|
|
return e;
|
|
}
|
|
|
|
function makeLocationExpr1(slash, rel) {
|
|
rel.absolute = true;
|
|
return rel;
|
|
}
|
|
|
|
function makeLocationExpr2(dslash, rel) {
|
|
rel.absolute = true;
|
|
rel.prependStep(makeAbbrevStep(dslash.value));
|
|
return rel;
|
|
}
|
|
|
|
function makeLocationExpr3(slash) {
|
|
var ret = new LocationExpr();
|
|
ret.appendStep(makeAbbrevStep('.'));
|
|
ret.absolute = true;
|
|
return ret;
|
|
}
|
|
|
|
function makeLocationExpr4(dslash) {
|
|
var ret = new LocationExpr();
|
|
ret.absolute = true;
|
|
ret.appendStep(makeAbbrevStep(dslash.value));
|
|
return ret;
|
|
}
|
|
|
|
function makeLocationExpr5(step) {
|
|
var ret = new LocationExpr();
|
|
ret.appendStep(step);
|
|
return ret;
|
|
}
|
|
|
|
function makeLocationExpr6(rel, slash, step) {
|
|
rel.appendStep(step);
|
|
return rel;
|
|
}
|
|
|
|
function makeLocationExpr7(rel, dslash, step) {
|
|
rel.appendStep(makeAbbrevStep(dslash.value));
|
|
return rel;
|
|
}
|
|
|
|
function makeStepExpr1(dot) {
|
|
return makeAbbrevStep(dot.value);
|
|
}
|
|
|
|
function makeStepExpr2(ddot) {
|
|
return makeAbbrevStep(ddot.value);
|
|
}
|
|
|
|
function makeStepExpr3(axisname, axis, nodetest) {
|
|
return new StepExpr(axisname.value, nodetest);
|
|
}
|
|
|
|
function makeStepExpr4(at, nodetest) {
|
|
return new StepExpr('attribute', nodetest);
|
|
}
|
|
|
|
function makeStepExpr5(nodetest) {
|
|
return new StepExpr('child', nodetest);
|
|
}
|
|
|
|
function makeStepExpr6(step, predicate) {
|
|
step.appendPredicate(predicate);
|
|
return step;
|
|
}
|
|
|
|
function makeAbbrevStep(abbrev) {
|
|
switch (abbrev) {
|
|
case '//':
|
|
return new StepExpr('descendant-or-self', new NodeTestAny);
|
|
|
|
case '.':
|
|
return new StepExpr('self', new NodeTestAny);
|
|
|
|
case '..':
|
|
return new StepExpr('parent', new NodeTestAny);
|
|
}
|
|
}
|
|
|
|
function makeNodeTestExpr1(asterisk) {
|
|
return new NodeTestElementOrAttribute;
|
|
}
|
|
|
|
function makeNodeTestExpr2(ncname, colon, asterisk) {
|
|
return new NodeTestNC(ncname.value);
|
|
}
|
|
|
|
function makeNodeTestExpr3(qname) {
|
|
return new NodeTestName(qname.value);
|
|
}
|
|
|
|
function makeNodeTestExpr4(typeo, parenc) {
|
|
var type = typeo.value.replace(/\s*\($/, '');
|
|
switch(type) {
|
|
case 'node':
|
|
return new NodeTestAny;
|
|
|
|
case 'text':
|
|
return new NodeTestText;
|
|
|
|
case 'comment':
|
|
return new NodeTestComment;
|
|
|
|
case 'processing-instruction':
|
|
return new NodeTestPI('');
|
|
}
|
|
}
|
|
|
|
function makeNodeTestExpr5(typeo, target, parenc) {
|
|
var type = typeo.replace(/\s*\($/, '');
|
|
if (type != 'processing-instruction') {
|
|
throw type;
|
|
}
|
|
return new NodeTestPI(target.value);
|
|
}
|
|
|
|
function makePredicateExpr(pareno, expr, parenc) {
|
|
return new PredicateExpr(expr);
|
|
}
|
|
|
|
function makePrimaryExpr(pareno, expr, parenc) {
|
|
return expr;
|
|
}
|
|
|
|
function makeFunctionCallExpr1(name, pareno, parenc) {
|
|
return new FunctionCallExpr(name);
|
|
}
|
|
|
|
function makeFunctionCallExpr2(name, pareno, arg1, args, parenc) {
|
|
var ret = new FunctionCallExpr(name);
|
|
ret.appendArg(arg1);
|
|
for (var i = 0; i < args.length; ++i) {
|
|
ret.appendArg(args[i]);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
function makeArgumentExpr(comma, expr) {
|
|
return expr;
|
|
}
|
|
|
|
function makeUnionExpr(expr1, pipe, expr2) {
|
|
return new UnionExpr(expr1, expr2);
|
|
}
|
|
|
|
function makePathExpr1(filter, slash, rel) {
|
|
return new PathExpr(filter, rel);
|
|
}
|
|
|
|
function makePathExpr2(filter, dslash, rel) {
|
|
rel.prependStep(makeAbbrevStep(dslash.value));
|
|
return new PathExpr(filter, rel);
|
|
}
|
|
|
|
function makeFilterExpr(expr, predicates) {
|
|
if (predicates.length > 0) {
|
|
return new FilterExpr(expr, predicates);
|
|
} else {
|
|
return expr;
|
|
}
|
|
}
|
|
|
|
function makeUnaryMinusExpr(minus, expr) {
|
|
return new UnaryMinusExpr(expr);
|
|
}
|
|
|
|
function makeBinaryExpr(expr1, op, expr2) {
|
|
return new BinaryExpr(expr1, op, expr2);
|
|
}
|
|
|
|
function makeLiteralExpr(token) {
|
|
// remove quotes from the parsed value:
|
|
var value = token.value.substring(1, token.value.length - 1);
|
|
return new LiteralExpr(value);
|
|
}
|
|
|
|
function makeNumberExpr(token) {
|
|
return new NumberExpr(token.value);
|
|
}
|
|
|
|
function makeVariableReference(dollar, name) {
|
|
return new VariableExpr(name.value);
|
|
}
|
|
|
|
// Used before parsing for optimization of common simple cases. See
|
|
// the begin of xpathParse() for which they are.
|
|
function makeSimpleExpr(expr) {
|
|
if (expr.charAt(0) == '$') {
|
|
return new VariableExpr(expr.substr(1));
|
|
} else if (expr.charAt(0) == '@') {
|
|
var a = new NodeTestName(expr.substr(1));
|
|
var b = new StepExpr('attribute', a);
|
|
var c = new LocationExpr();
|
|
c.appendStep(b);
|
|
return c;
|
|
} else if (expr.match(/^[0-9]+$/)) {
|
|
return new NumberExpr(expr);
|
|
} else {
|
|
var a = new NodeTestName(expr);
|
|
var b = new StepExpr('child', a);
|
|
var c = new LocationExpr();
|
|
c.appendStep(b);
|
|
return c;
|
|
}
|
|
}
|
|
|
|
function makeSimpleExpr2(expr) {
|
|
var steps = stringSplit(expr, '/');
|
|
var c = new LocationExpr();
|
|
for (var i = 0; i < steps.length; ++i) {
|
|
var a = new NodeTestName(steps[i]);
|
|
var b = new StepExpr('child', a);
|
|
c.appendStep(b);
|
|
}
|
|
return c;
|
|
}
|
|
|
|
// The axes of XPath expressions.
|
|
|
|
var xpathAxis = {
|
|
ANCESTOR_OR_SELF: 'ancestor-or-self',
|
|
ANCESTOR: 'ancestor',
|
|
ATTRIBUTE: 'attribute',
|
|
CHILD: 'child',
|
|
DESCENDANT_OR_SELF: 'descendant-or-self',
|
|
DESCENDANT: 'descendant',
|
|
FOLLOWING_SIBLING: 'following-sibling',
|
|
FOLLOWING: 'following',
|
|
NAMESPACE: 'namespace',
|
|
PARENT: 'parent',
|
|
PRECEDING_SIBLING: 'preceding-sibling',
|
|
PRECEDING: 'preceding',
|
|
SELF: 'self'
|
|
};
|
|
|
|
var xpathAxesRe = [
|
|
xpathAxis.ANCESTOR_OR_SELF,
|
|
xpathAxis.ANCESTOR,
|
|
xpathAxis.ATTRIBUTE,
|
|
xpathAxis.CHILD,
|
|
xpathAxis.DESCENDANT_OR_SELF,
|
|
xpathAxis.DESCENDANT,
|
|
xpathAxis.FOLLOWING_SIBLING,
|
|
xpathAxis.FOLLOWING,
|
|
xpathAxis.NAMESPACE,
|
|
xpathAxis.PARENT,
|
|
xpathAxis.PRECEDING_SIBLING,
|
|
xpathAxis.PRECEDING,
|
|
xpathAxis.SELF
|
|
].join('|');
|
|
|
|
|
|
// The tokens of the language. The label property is just used for
|
|
// generating debug output. The prec property is the precedence used
|
|
// for shift/reduce resolution. Default precedence is 0 as a lookahead
|
|
// token and 2 on the stack. TODO(mesch): this is certainly not
|
|
// necessary and too complicated. Simplify this!
|
|
|
|
// NOTE: tabular formatting is the big exception, but here it should
|
|
// be OK.
|
|
|
|
var TOK_PIPE = { label: "|", prec: 17, re: new RegExp("^\\|") };
|
|
var TOK_DSLASH = { label: "//", prec: 19, re: new RegExp("^//") };
|
|
var TOK_SLASH = { label: "/", prec: 30, re: new RegExp("^/") };
|
|
var TOK_AXIS = { label: "::", prec: 20, re: new RegExp("^::") };
|
|
var TOK_COLON = { label: ":", prec: 1000, re: new RegExp("^:") };
|
|
var TOK_AXISNAME = { label: "[axis]", re: new RegExp('^(' + xpathAxesRe + ')') };
|
|
var TOK_PARENO = { label: "(", prec: 34, re: new RegExp("^\\(") };
|
|
var TOK_PARENC = { label: ")", re: new RegExp("^\\)") };
|
|
var TOK_DDOT = { label: "..", prec: 34, re: new RegExp("^\\.\\.") };
|
|
var TOK_DOT = { label: ".", prec: 34, re: new RegExp("^\\.") };
|
|
var TOK_AT = { label: "@", prec: 34, re: new RegExp("^@") };
|
|
|
|
var TOK_COMMA = { label: ",", re: new RegExp("^,") };
|
|
|
|
var TOK_OR = { label: "or", prec: 10, re: new RegExp("^or\\b") };
|
|
var TOK_AND = { label: "and", prec: 11, re: new RegExp("^and\\b") };
|
|
var TOK_EQ = { label: "=", prec: 12, re: new RegExp("^=") };
|
|
var TOK_NEQ = { label: "!=", prec: 12, re: new RegExp("^!=") };
|
|
var TOK_GE = { label: ">=", prec: 13, re: new RegExp("^>=") };
|
|
var TOK_GT = { label: ">", prec: 13, re: new RegExp("^>") };
|
|
var TOK_LE = { label: "<=", prec: 13, re: new RegExp("^<=") };
|
|
var TOK_LT = { label: "<", prec: 13, re: new RegExp("^<") };
|
|
var TOK_PLUS = { label: "+", prec: 14, re: new RegExp("^\\+"), left: true };
|
|
var TOK_MINUS = { label: "-", prec: 14, re: new RegExp("^\\-"), left: true };
|
|
var TOK_DIV = { label: "div", prec: 15, re: new RegExp("^div\\b"), left: true };
|
|
var TOK_MOD = { label: "mod", prec: 15, re: new RegExp("^mod\\b"), left: true };
|
|
|
|
var TOK_BRACKO = { label: "[", prec: 32, re: new RegExp("^\\[") };
|
|
var TOK_BRACKC = { label: "]", re: new RegExp("^\\]") };
|
|
var TOK_DOLLAR = { label: "$", re: new RegExp("^\\$") };
|
|
|
|
var TOK_NCNAME = { label: "[ncname]", re: new RegExp('^' + XML_NC_NAME) };
|
|
|
|
var TOK_ASTERISK = { label: "*", prec: 15, re: new RegExp("^\\*"), left: true };
|
|
var TOK_LITERALQ = { label: "[litq]", prec: 20, re: new RegExp("^'[^\\']*'") };
|
|
var TOK_LITERALQQ = {
|
|
label: "[litqq]",
|
|
prec: 20,
|
|
re: new RegExp('^"[^\\"]*"')
|
|
};
|
|
|
|
var TOK_NUMBER = {
|
|
label: "[number]",
|
|
prec: 35,
|
|
re: new RegExp('^\\d+(\\.\\d*)?') };
|
|
|
|
var TOK_QNAME = {
|
|
label: "[qname]",
|
|
re: new RegExp('^(' + XML_NC_NAME + ':)?' + XML_NC_NAME)
|
|
};
|
|
|
|
var TOK_NODEO = {
|
|
label: "[nodetest-start]",
|
|
re: new RegExp('^(processing-instruction|comment|text|node)\\(')
|
|
};
|
|
|
|
// The table of the tokens of our grammar, used by the lexer: first
|
|
// column the tag, second column a regexp to recognize it in the
|
|
// input, third column the precedence of the token, fourth column a
|
|
// factory function for the semantic value of the token.
|
|
//
|
|
// NOTE: order of this list is important, because the first match
|
|
// counts. Cf. DDOT and DOT, and AXIS and COLON.
|
|
|
|
var xpathTokenRules = [
|
|
TOK_DSLASH,
|
|
TOK_SLASH,
|
|
TOK_DDOT,
|
|
TOK_DOT,
|
|
TOK_AXIS,
|
|
TOK_COLON,
|
|
TOK_AXISNAME,
|
|
TOK_NODEO,
|
|
TOK_PARENO,
|
|
TOK_PARENC,
|
|
TOK_BRACKO,
|
|
TOK_BRACKC,
|
|
TOK_AT,
|
|
TOK_COMMA,
|
|
TOK_OR,
|
|
TOK_AND,
|
|
TOK_NEQ,
|
|
TOK_EQ,
|
|
TOK_GE,
|
|
TOK_GT,
|
|
TOK_LE,
|
|
TOK_LT,
|
|
TOK_PLUS,
|
|
TOK_MINUS,
|
|
TOK_ASTERISK,
|
|
TOK_PIPE,
|
|
TOK_MOD,
|
|
TOK_DIV,
|
|
TOK_LITERALQ,
|
|
TOK_LITERALQQ,
|
|
TOK_NUMBER,
|
|
TOK_QNAME,
|
|
TOK_NCNAME,
|
|
TOK_DOLLAR
|
|
];
|
|
|
|
// All the nonterminals of the grammar. The nonterminal objects are
|
|
// identified by object identity; the labels are used in the debug
|
|
// output only.
|
|
var XPathLocationPath = { label: "LocationPath" };
|
|
var XPathRelativeLocationPath = { label: "RelativeLocationPath" };
|
|
var XPathAbsoluteLocationPath = { label: "AbsoluteLocationPath" };
|
|
var XPathStep = { label: "Step" };
|
|
var XPathNodeTest = { label: "NodeTest" };
|
|
var XPathPredicate = { label: "Predicate" };
|
|
var XPathLiteral = { label: "Literal" };
|
|
var XPathExpr = { label: "Expr" };
|
|
var XPathPrimaryExpr = { label: "PrimaryExpr" };
|
|
var XPathVariableReference = { label: "Variablereference" };
|
|
var XPathNumber = { label: "Number" };
|
|
var XPathFunctionCall = { label: "FunctionCall" };
|
|
var XPathArgumentRemainder = { label: "ArgumentRemainder" };
|
|
var XPathPathExpr = { label: "PathExpr" };
|
|
var XPathUnionExpr = { label: "UnionExpr" };
|
|
var XPathFilterExpr = { label: "FilterExpr" };
|
|
var XPathDigits = { label: "Digits" };
|
|
|
|
var xpathNonTerminals = [
|
|
XPathLocationPath,
|
|
XPathRelativeLocationPath,
|
|
XPathAbsoluteLocationPath,
|
|
XPathStep,
|
|
XPathNodeTest,
|
|
XPathPredicate,
|
|
XPathLiteral,
|
|
XPathExpr,
|
|
XPathPrimaryExpr,
|
|
XPathVariableReference,
|
|
XPathNumber,
|
|
XPathFunctionCall,
|
|
XPathArgumentRemainder,
|
|
XPathPathExpr,
|
|
XPathUnionExpr,
|
|
XPathFilterExpr,
|
|
XPathDigits
|
|
];
|
|
|
|
// Quantifiers that are used in the productions of the grammar.
|
|
var Q_01 = { label: "?" };
|
|
var Q_MM = { label: "*" };
|
|
var Q_1M = { label: "+" };
|
|
|
|
// Tag for left associativity (right assoc is implied by undefined).
|
|
var ASSOC_LEFT = true;
|
|
|
|
// The productions of the grammar. Columns of the table:
|
|
//
|
|
// - target nonterminal,
|
|
// - pattern,
|
|
// - precedence,
|
|
// - semantic value factory
|
|
//
|
|
// The semantic value factory is a function that receives parse tree
|
|
// nodes from the stack frames of the matched symbols as arguments and
|
|
// returns an a node of the parse tree. The node is stored in the top
|
|
// stack frame along with the target object of the rule. The node in
|
|
// the parse tree is an expression object that has an evaluate() method
|
|
// and thus evaluates XPath expressions.
|
|
//
|
|
// The precedence is used to decide between reducing and shifting by
|
|
// comparing the precendence of the rule that is candidate for
|
|
// reducing with the precedence of the look ahead token. Precedence of
|
|
// -1 means that the precedence of the tokens in the pattern is used
|
|
// instead. TODO: It shouldn't be necessary to explicitly assign
|
|
// precedences to rules.
|
|
|
|
var xpathGrammarRules =
|
|
[
|
|
[ XPathLocationPath, [ XPathRelativeLocationPath ], 18,
|
|
passExpr ],
|
|
[ XPathLocationPath, [ XPathAbsoluteLocationPath ], 18,
|
|
passExpr ],
|
|
|
|
[ XPathAbsoluteLocationPath, [ TOK_SLASH, XPathRelativeLocationPath ], 18,
|
|
makeLocationExpr1 ],
|
|
[ XPathAbsoluteLocationPath, [ TOK_DSLASH, XPathRelativeLocationPath ], 18,
|
|
makeLocationExpr2 ],
|
|
|
|
[ XPathAbsoluteLocationPath, [ TOK_SLASH ], 0,
|
|
makeLocationExpr3 ],
|
|
[ XPathAbsoluteLocationPath, [ TOK_DSLASH ], 0,
|
|
makeLocationExpr4 ],
|
|
|
|
[ XPathRelativeLocationPath, [ XPathStep ], 31,
|
|
makeLocationExpr5 ],
|
|
[ XPathRelativeLocationPath,
|
|
[ XPathRelativeLocationPath, TOK_SLASH, XPathStep ], 31,
|
|
makeLocationExpr6 ],
|
|
[ XPathRelativeLocationPath,
|
|
[ XPathRelativeLocationPath, TOK_DSLASH, XPathStep ], 31,
|
|
makeLocationExpr7 ],
|
|
|
|
[ XPathStep, [ TOK_DOT ], 33,
|
|
makeStepExpr1 ],
|
|
[ XPathStep, [ TOK_DDOT ], 33,
|
|
makeStepExpr2 ],
|
|
[ XPathStep,
|
|
[ TOK_AXISNAME, TOK_AXIS, XPathNodeTest ], 33,
|
|
makeStepExpr3 ],
|
|
[ XPathStep, [ TOK_AT, XPathNodeTest ], 33,
|
|
makeStepExpr4 ],
|
|
[ XPathStep, [ XPathNodeTest ], 33,
|
|
makeStepExpr5 ],
|
|
[ XPathStep, [ XPathStep, XPathPredicate ], 33,
|
|
makeStepExpr6 ],
|
|
|
|
[ XPathNodeTest, [ TOK_ASTERISK ], 33,
|
|
makeNodeTestExpr1 ],
|
|
[ XPathNodeTest, [ TOK_NCNAME, TOK_COLON, TOK_ASTERISK ], 33,
|
|
makeNodeTestExpr2 ],
|
|
[ XPathNodeTest, [ TOK_QNAME ], 33,
|
|
makeNodeTestExpr3 ],
|
|
[ XPathNodeTest, [ TOK_NODEO, TOK_PARENC ], 33,
|
|
makeNodeTestExpr4 ],
|
|
[ XPathNodeTest, [ TOK_NODEO, XPathLiteral, TOK_PARENC ], 33,
|
|
makeNodeTestExpr5 ],
|
|
|
|
[ XPathPredicate, [ TOK_BRACKO, XPathExpr, TOK_BRACKC ], 33,
|
|
makePredicateExpr ],
|
|
|
|
[ XPathPrimaryExpr, [ XPathVariableReference ], 33,
|
|
passExpr ],
|
|
[ XPathPrimaryExpr, [ TOK_PARENO, XPathExpr, TOK_PARENC ], 33,
|
|
makePrimaryExpr ],
|
|
[ XPathPrimaryExpr, [ XPathLiteral ], 30,
|
|
passExpr ],
|
|
[ XPathPrimaryExpr, [ XPathNumber ], 30,
|
|
passExpr ],
|
|
[ XPathPrimaryExpr, [ XPathFunctionCall ], 30,
|
|
passExpr ],
|
|
|
|
[ XPathFunctionCall, [ TOK_QNAME, TOK_PARENO, TOK_PARENC ], -1,
|
|
makeFunctionCallExpr1 ],
|
|
[ XPathFunctionCall,
|
|
[ TOK_QNAME, TOK_PARENO, XPathExpr, XPathArgumentRemainder, Q_MM,
|
|
TOK_PARENC ], -1,
|
|
makeFunctionCallExpr2 ],
|
|
[ XPathArgumentRemainder, [ TOK_COMMA, XPathExpr ], -1,
|
|
makeArgumentExpr ],
|
|
|
|
[ XPathUnionExpr, [ XPathPathExpr ], 20,
|
|
passExpr ],
|
|
[ XPathUnionExpr, [ XPathUnionExpr, TOK_PIPE, XPathPathExpr ], 20,
|
|
makeUnionExpr ],
|
|
|
|
[ XPathPathExpr, [ XPathLocationPath ], 20,
|
|
passExpr ],
|
|
[ XPathPathExpr, [ XPathFilterExpr ], 19,
|
|
passExpr ],
|
|
[ XPathPathExpr,
|
|
[ XPathFilterExpr, TOK_SLASH, XPathRelativeLocationPath ], 20,
|
|
makePathExpr1 ],
|
|
[ XPathPathExpr,
|
|
[ XPathFilterExpr, TOK_DSLASH, XPathRelativeLocationPath ], 20,
|
|
makePathExpr2 ],
|
|
|
|
[ XPathFilterExpr, [ XPathPrimaryExpr, XPathPredicate, Q_MM ], 20,
|
|
makeFilterExpr ],
|
|
|
|
[ XPathExpr, [ XPathPrimaryExpr ], 16,
|
|
passExpr ],
|
|
[ XPathExpr, [ XPathUnionExpr ], 16,
|
|
passExpr ],
|
|
|
|
[ XPathExpr, [ TOK_MINUS, XPathExpr ], -1,
|
|
makeUnaryMinusExpr ],
|
|
|
|
[ XPathExpr, [ XPathExpr, TOK_OR, XPathExpr ], -1,
|
|
makeBinaryExpr ],
|
|
[ XPathExpr, [ XPathExpr, TOK_AND, XPathExpr ], -1,
|
|
makeBinaryExpr ],
|
|
|
|
[ XPathExpr, [ XPathExpr, TOK_EQ, XPathExpr ], -1,
|
|
makeBinaryExpr ],
|
|
[ XPathExpr, [ XPathExpr, TOK_NEQ, XPathExpr ], -1,
|
|
makeBinaryExpr ],
|
|
|
|
[ XPathExpr, [ XPathExpr, TOK_LT, XPathExpr ], -1,
|
|
makeBinaryExpr ],
|
|
[ XPathExpr, [ XPathExpr, TOK_LE, XPathExpr ], -1,
|
|
makeBinaryExpr ],
|
|
[ XPathExpr, [ XPathExpr, TOK_GT, XPathExpr ], -1,
|
|
makeBinaryExpr ],
|
|
[ XPathExpr, [ XPathExpr, TOK_GE, XPathExpr ], -1,
|
|
makeBinaryExpr ],
|
|
|
|
[ XPathExpr, [ XPathExpr, TOK_PLUS, XPathExpr ], -1,
|
|
makeBinaryExpr, ASSOC_LEFT ],
|
|
[ XPathExpr, [ XPathExpr, TOK_MINUS, XPathExpr ], -1,
|
|
makeBinaryExpr, ASSOC_LEFT ],
|
|
|
|
[ XPathExpr, [ XPathExpr, TOK_ASTERISK, XPathExpr ], -1,
|
|
makeBinaryExpr, ASSOC_LEFT ],
|
|
[ XPathExpr, [ XPathExpr, TOK_DIV, XPathExpr ], -1,
|
|
makeBinaryExpr, ASSOC_LEFT ],
|
|
[ XPathExpr, [ XPathExpr, TOK_MOD, XPathExpr ], -1,
|
|
makeBinaryExpr, ASSOC_LEFT ],
|
|
|
|
[ XPathLiteral, [ TOK_LITERALQ ], -1,
|
|
makeLiteralExpr ],
|
|
[ XPathLiteral, [ TOK_LITERALQQ ], -1,
|
|
makeLiteralExpr ],
|
|
|
|
[ XPathNumber, [ TOK_NUMBER ], -1,
|
|
makeNumberExpr ],
|
|
|
|
[ XPathVariableReference, [ TOK_DOLLAR, TOK_QNAME ], 200,
|
|
makeVariableReference ]
|
|
];
|
|
|
|
// That function computes some optimizations of the above data
|
|
// structures and will be called right here. It merely takes the
|
|
// counter variables out of the global scope.
|
|
|
|
var xpathRules = [];
|
|
|
|
function xpathParseInit() {
|
|
if (xpathRules.length) {
|
|
return;
|
|
}
|
|
|
|
// Some simple optimizations for the xpath expression parser: sort
|
|
// grammar rules descending by length, so that the longest match is
|
|
// first found.
|
|
|
|
xpathGrammarRules.sort(function(a,b) {
|
|
var la = a[1].length;
|
|
var lb = b[1].length;
|
|
if (la < lb) {
|
|
return 1;
|
|
} else if (la > lb) {
|
|
return -1;
|
|
} else {
|
|
return 0;
|
|
}
|
|
});
|
|
|
|
var k = 1;
|
|
for (var i = 0; i < xpathNonTerminals.length; ++i) {
|
|
xpathNonTerminals[i].key = k++;
|
|
}
|
|
|
|
for (i = 0; i < xpathTokenRules.length; ++i) {
|
|
xpathTokenRules[i].key = k++;
|
|
}
|
|
|
|
xpathLog('XPath parse INIT: ' + k + ' rules');
|
|
|
|
// Another slight optimization: sort the rules into bins according
|
|
// to the last element (observing quantifiers), so we can restrict
|
|
// the match against the stack to the subest of rules that match the
|
|
// top of the stack.
|
|
//
|
|
// TODO(mesch): What we actually want is to compute states as in
|
|
// bison, so that we don't have to do any explicit and iterated
|
|
// match against the stack.
|
|
|
|
function push_(array, position, element) {
|
|
if (!array[position]) {
|
|
array[position] = [];
|
|
}
|
|
array[position].push(element);
|
|
}
|
|
|
|
for (i = 0; i < xpathGrammarRules.length; ++i) {
|
|
var rule = xpathGrammarRules[i];
|
|
var pattern = rule[1];
|
|
|
|
for (var j = pattern.length - 1; j >= 0; --j) {
|
|
if (pattern[j] == Q_1M) {
|
|
push_(xpathRules, pattern[j-1].key, rule);
|
|
break;
|
|
|
|
} else if (pattern[j] == Q_MM || pattern[j] == Q_01) {
|
|
push_(xpathRules, pattern[j-1].key, rule);
|
|
--j;
|
|
|
|
} else {
|
|
push_(xpathRules, pattern[j].key, rule);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
xpathLog('XPath parse INIT: ' + xpathRules.length + ' rule bins');
|
|
|
|
var sum = 0;
|
|
mapExec(xpathRules, function(i) {
|
|
if (i) {
|
|
sum += i.length;
|
|
}
|
|
});
|
|
|
|
xpathLog('XPath parse INIT: ' + (sum / xpathRules.length) +
|
|
' average bin size');
|
|
}
|
|
|
|
// Local utility functions that are used by the lexer or parser.
|
|
|
|
function xpathCollectDescendants(nodelist, node) {
|
|
for (var n = node.firstChild; n; n = n.nextSibling) {
|
|
nodelist.push(n);
|
|
arguments.callee(nodelist, n);
|
|
}
|
|
}
|
|
|
|
function xpathCollectDescendantsReverse(nodelist, node) {
|
|
for (var n = node.lastChild; n; n = n.previousSibling) {
|
|
nodelist.push(n);
|
|
arguments.callee(nodelist, n);
|
|
}
|
|
}
|
|
|
|
|
|
// The entry point for the library: match an expression against a DOM
|
|
// node. Returns an XPath value.
|
|
function xpathDomEval(expr, node) {
|
|
var expr1 = xpathParse(expr);
|
|
var ret = expr1.evaluate(new ExprContext(node));
|
|
return ret;
|
|
}
|
|
|
|
// Utility function to sort a list of nodes. Used by xsltSort() and
|
|
// nxslSelect().
|
|
function xpathSort(input, sort) {
|
|
if (sort.length == 0) {
|
|
return;
|
|
}
|
|
|
|
var sortlist = [];
|
|
|
|
for (var i = 0; i < input.contextSize(); ++i) {
|
|
var node = input.nodelist[i];
|
|
var sortitem = { node: node, key: [] };
|
|
var context = input.clone(node, 0, [ node ]);
|
|
|
|
for (var j = 0; j < sort.length; ++j) {
|
|
var s = sort[j];
|
|
var value = s.expr.evaluate(context);
|
|
|
|
var evalue;
|
|
if (s.type == 'text') {
|
|
evalue = value.stringValue();
|
|
} else if (s.type == 'number') {
|
|
evalue = value.numberValue();
|
|
}
|
|
sortitem.key.push({ value: evalue, order: s.order });
|
|
}
|
|
|
|
// Make the sort stable by adding a lowest priority sort by
|
|
// id. This is very convenient and furthermore required by the
|
|
// spec ([XSLT] - Section 10 Sorting).
|
|
sortitem.key.push({ value: i, order: 'ascending' });
|
|
|
|
sortlist.push(sortitem);
|
|
}
|
|
|
|
sortlist.sort(xpathSortByKey);
|
|
|
|
var nodes = [];
|
|
for (var i = 0; i < sortlist.length; ++i) {
|
|
nodes.push(sortlist[i].node);
|
|
}
|
|
input.nodelist = nodes;
|
|
input.setNode(0);
|
|
}
|
|
|
|
|
|
// Sorts by all order criteria defined. According to the JavaScript
|
|
// spec ([ECMA] Section 11.8.5), the compare operators compare strings
|
|
// as strings and numbers as numbers.
|
|
//
|
|
// NOTE: In browsers which do not follow the spec, this breaks only in
|
|
// the case that numbers should be sorted as strings, which is very
|
|
// uncommon.
|
|
function xpathSortByKey(v1, v2) {
|
|
// NOTE: Sort key vectors of different length never occur in
|
|
// xsltSort.
|
|
|
|
for (var i = 0; i < v1.key.length; ++i) {
|
|
var o = v1.key[i].order == 'descending' ? -1 : 1;
|
|
if (v1.key[i].value > v2.key[i].value) {
|
|
return +1 * o;
|
|
} else if (v1.key[i].value < v2.key[i].value) {
|
|
return -1 * o;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
// Parses and then evaluates the given XPath expression in the given
|
|
// input context. Notice that parsed xpath expressions are cached.
|
|
function xpathEval(select, context) {
|
|
var expr = xpathParse(select);
|
|
var ret = expr.evaluate(context);
|
|
return ret;
|
|
}
|
|
|
|
|
|
// Copyright 2005, Google Inc.
|
|
// All Rights Reserved.
|
|
//
|
|
// Unit test for the XPath parser and engine.
|
|
//
|
|
// Author: Steffen Meschkat <mesch@google.com>
|
|
// Junji Takagi <jtakagi@google.com>
|
|
|
|
var expr = [
|
|
"@*",
|
|
"@*|node()",
|
|
"/descendant-or-self::div",
|
|
"//div",
|
|
"substring('12345', 0, 3)",
|
|
"//title | //link",
|
|
"$x//title",
|
|
// "$x/title", // TODO(mesch): parsing of this expression is broken
|
|
"id('a')//title",
|
|
"//*[@about]",
|
|
"count(descendant::*)",
|
|
"count(descendant::*) + count(ancestor::*)",
|
|
"concat(substring-before(@image,'marker'),'icon',substring-after(@image,'marker'))",
|
|
"@*|text()",
|
|
"*|/",
|
|
"source|destination",
|
|
"$page != 'to' and $page != 'from'",
|
|
"substring-after(icon/@image, '/mapfiles/marker')",
|
|
"substring-before($str, $c)",
|
|
"$page = 'from'",
|
|
"segments/@time",
|
|
"child::para",
|
|
"child::*",
|
|
"child::text()",
|
|
"child::node()",
|
|
"attribute::name",
|
|
"attribute::*",
|
|
"descendant::para",
|
|
"ancestor::div",
|
|
"ancestor-or-self::div",
|
|
"descendant-or-self::para",
|
|
"self::para",
|
|
"child::chapter/descendant::para",
|
|
"child::*/child::para",
|
|
"/",
|
|
"/descendant::para",
|
|
"/descendant::olist/child::item",
|
|
"child::para[position()=1]",
|
|
"child::para[position()=last()]",
|
|
"child::para[position()=last()-1]",
|
|
"child::para[position()>1]",
|
|
"following-sibling::chapter[position()=1]",
|
|
"preceding-sibling::chapter[position()=1]",
|
|
"/descendant::figure[position()=42]",
|
|
"/child::doc/child::chapter[position()=5]/child::section[position()=2]",
|
|
"child::para[attribute::type='warning']",
|
|
"child::para[attribute::type='warning'][position()=5]",
|
|
"child::para[position()=5][attribute::type='warning']",
|
|
"child::chapter[child::title='Introduction']",
|
|
"child::chapter[child::title]",
|
|
"child::*[self::chapter or self::appendix]",
|
|
"child::*[self::chapter or self::appendix][position()=last()]",
|
|
"count(//*[id='u1']|//*[id='u2'])",
|
|
"count(//*[id='u1']|//*[class='u'])",
|
|
"count(//*[class='u']|//*[class='u'])",
|
|
"count(//*[class='u']|//*[id='u1'])",
|
|
|
|
// Axis expressions
|
|
"count(//*[@id='self']/ancestor-or-self::*)",
|
|
"count(//*[@id='self']/ancestor::*)",
|
|
"count(//*[@id='self']/attribute::*)",
|
|
"count(//*[@id='self']/child::*)",
|
|
"count(//*[@id='self']/descendant-or-self::*)",
|
|
"count(//*[@id='self']/descendant::*)",
|
|
"count(//*[@id='self']/following-sibling::*)",
|
|
"count(//*[@id='self']/following::*)",
|
|
"//*[@id='self']/parent::*/@id",
|
|
"count(//*[@id='self']/preceding-sibling::*)",
|
|
"count(//*[@id='self']/preceding::*)",
|
|
"//*[@id='self']/self::*/@id",
|
|
|
|
// (Japanese)
|
|
"/descendant-or-self::\u90e8\u5206",
|
|
"//\u90e8\u5206",
|
|
"substring('\uff11\uff12\uff13\uff14\uff15', 0, 3)",
|
|
"//\u30bf\u30a4\u30c8\u30eb | //\u30ea\u30f3\u30af",
|
|
"$\u8b0e//\u30bf\u30a4\u30c8\u30eb",
|
|
"//*[@\u30c7\u30b9\u30c6\u30a3\u30cd\u30a4\u30b7\u30e7\u30f3]",
|
|
"concat(substring-before(@\u30a4\u30e1\u30fc\u30b8,'\u76ee\u5370'),'\u30a2\u30a4\u30b3\u30f3',substring-after(@\u30a4\u30e1\u30fc\u30b8,'\u76ee\u5370'))",
|
|
"\u30bd\u30fc\u30b9|\u30c7\u30b9\u30c6\u30a3\u30cd\u30a4\u30b7\u30e7\u30f3",
|
|
"$\u30da\u30fc\u30b8 != '\u307e\u3067' and $\u30da\u30fc\u30b8 != '\u304b\u3089'",
|
|
"substring-after(\u30a2\u30a4\u30b3\u30f3/@\u30a4\u30e1\u30fc\u30b8, '/\u5730\u56f3\u30d5\u30a1\u30a4\u30eb/\u76ee\u5370')",
|
|
"substring-before($\u6587\u5b57\u5217, $\u6587\u5b57)",
|
|
"$\u30da\u30fc\u30b8 = '\u304b\u3089'",
|
|
"\u30bb\u30b0\u30e1\u30f3\u30c8/@\u6642\u523b",
|
|
"child::\u6bb5\u843d",
|
|
"attribute::\u540d\u524d",
|
|
"descendant::\u6bb5\u843d",
|
|
"ancestor::\u90e8\u5206",
|
|
"ancestor-or-self::\u90e8\u5206",
|
|
"descendant-or-self::\u6bb5\u843d",
|
|
"self::\u6bb5\u843d",
|
|
"child::\u7ae0/descendant::\u6bb5\u843d",
|
|
"child::*/child::\u6bb5\u843d",
|
|
"/descendant::\u6bb5\u843d",
|
|
"/descendant::\u9806\u5e8f\u30ea\u30b9\u30c8/child::\u9805\u76ee",
|
|
"child::\u6bb5\u843d[position()=1]",
|
|
"child::\u6bb5\u843d[position()=last()]",
|
|
"child::\u6bb5\u843d[position()=last()-1]",
|
|
"child::\u6bb5\u843d[position()>1]",
|
|
"following-sibling::\u7ae0[position()=1]",
|
|
"preceding-sibling::\u7ae0[position()=1]",
|
|
"/descendant::\u56f3\u8868[position()=42]",
|
|
"/child::\u6587\u66f8/child::\u7ae0[position()=5]/child::\u7bc0[position()=2]",
|
|
"child::\u6bb5\u843d[attribute::\u30bf\u30a4\u30d7='\u8b66\u544a']",
|
|
"child::\u6bb5\u843d[attribute::\u30bf\u30a4\u30d7='\u8b66\u544a'][position()=5]",
|
|
"child::\u6bb5\u843d[position()=5][attribute::\u30bf\u30a4\u30d7='\u8b66\u544a']",
|
|
"child::\u7ae0[child::\u30bf\u30a4\u30c8\u30eb='\u306f\u3058\u3081\u306b']",
|
|
"child::\u7ae0[child::\u30bf\u30a4\u30c8\u30eb]",
|
|
"child::*[self::\u7ae0 or self::\u4ed8\u9332]",
|
|
"child::*[self::\u7ae0 or self::\u4ed8\u9332][position()=last()]",
|
|
|
|
// The following are all expressions that used to occur in google
|
|
// maps XSLT templates.
|
|
"$address",
|
|
"$address=string(/page/user/defaultlocation)",
|
|
"$count-of-snippet-of-url = 0",
|
|
"$daddr",
|
|
"$form",
|
|
"$form = 'from'",
|
|
"$form = 'to'",
|
|
"$form='near'",
|
|
"$home",
|
|
"$i",
|
|
"$i > $page and $i < $page + $range",
|
|
"$i < $page and $i >= $page - $range",
|
|
"$i < @max",
|
|
"$i <= $page",
|
|
"$i + 1",
|
|
"$i = $page",
|
|
"$i = 1",
|
|
"$info = position() or (not($info) and position() = 1)",
|
|
"$is-first-order",
|
|
"$is-first-order and $snippets-exist",
|
|
"$more",
|
|
"$more > 0",
|
|
"$near-point",
|
|
"$page",
|
|
"$page != 'from'",
|
|
"$page != 'to'",
|
|
"$page != 'to' and $page != 'from'",
|
|
"$page > 1",
|
|
"$page = 'basics'",
|
|
"$page = 'details'",
|
|
"$page = 'from'",
|
|
"$page = 'to'",
|
|
"$page='from'",
|
|
"$page='to'",
|
|
"$r >= 0.5",
|
|
"$r >= 1",
|
|
"$r - 0",
|
|
"$r - 1",
|
|
"$r - 2",
|
|
"$r - 3",
|
|
"$r - 4",
|
|
"$saddr",
|
|
"$sources",
|
|
"$sources[position() < $details]",
|
|
"$src",
|
|
"$str",
|
|
"\"'\"",
|
|
"(//location[string(info/references/reference[1]/url)=string($current-url)]/info/references/reference[1])[1]",
|
|
"(not($count-of-snippet-of-url = 0) and (position() = 1) or not($current-url = //locations/location[position() = $last-pos]//reference[1]/url))",
|
|
"(not($info) and position() = 1) or $info = position()",
|
|
".",
|
|
"../@arg0",
|
|
"../@filterpng",
|
|
"/page/@filterpng",
|
|
"4",
|
|
"@attribution",
|
|
"@id",
|
|
"@max > @num",
|
|
"@meters > 16093",
|
|
"@name",
|
|
"@start div @num + 1",
|
|
"@url",
|
|
"ad",
|
|
"address/line",
|
|
"adsmessage",
|
|
"attr",
|
|
"boolean(location[@id='near'][icon/@image])",
|
|
"bubble/node()",
|
|
"calltoaction/node()",
|
|
"category",
|
|
"contains($str, $c)",
|
|
"count(//location[string(info/references/reference[1]/url)=string($current-url)]//snippet)",
|
|
"count(//snippet)",
|
|
"count(attr)",
|
|
"count(location)",
|
|
"count(structured/source) > 1",
|
|
"description/node()",
|
|
"destination",
|
|
"destinationAddress",
|
|
"domain",
|
|
"false()",
|
|
"icon/@class != 'noicon'",
|
|
"icon/@image",
|
|
"info",
|
|
"info/address/line",
|
|
"info/distance",
|
|
"info/distance and $near-point",
|
|
"info/distance and info/phone and $near-point",
|
|
"info/distance or info/phone",
|
|
"info/panel/node()",
|
|
"info/phone",
|
|
"info/references/reference[1]",
|
|
"info/references/reference[1]/snippet",
|
|
"info/references/reference[1]/url",
|
|
"info/title",
|
|
"info/title/node()",
|
|
"line",
|
|
"location",
|
|
"location[@id!='near']",
|
|
"location[@id='near'][icon/@image]",
|
|
"location[position() > $numlocations div 2]",
|
|
"location[position() <= $numlocations div 2]",
|
|
"locations",
|
|
"locations/location",
|
|
"near",
|
|
"node()",
|
|
"not($count-of-snippets = 0)",
|
|
"not($form = 'from')",
|
|
"not($form = 'near')",
|
|
"not($form = 'to')",
|
|
"not(../@page)",
|
|
"not(structured/source)",
|
|
"notice",
|
|
"number(../@info)",
|
|
"number(../@items)",
|
|
"number(/page/@linewidth)",
|
|
"page/ads",
|
|
"page/directions",
|
|
"page/error",
|
|
"page/overlay",
|
|
"page/overlay/locations/location",
|
|
"page/refinements",
|
|
"page/request/canonicalnear",
|
|
"page/request/near",
|
|
"page/request/query",
|
|
"page/spelling/suggestion",
|
|
"page/user/defaultlocation",
|
|
"phone",
|
|
"position()",
|
|
"position() != 1",
|
|
"position() != last()",
|
|
"position() > 1",
|
|
"position() < $details",
|
|
"position()-1",
|
|
"query",
|
|
"references/@total",
|
|
"references/reference",
|
|
"references/reference/domain",
|
|
"references/reference/url",
|
|
"reviews/@positive div (reviews/@positive + reviews/@negative) * 5",
|
|
"reviews/@positive div (reviews/@positive + reviews/@negative) * (5)",
|
|
"reviews/@total",
|
|
"reviews/@total > 1",
|
|
"reviews/@total > 5",
|
|
"reviews/@total = 1",
|
|
"segments/@distance",
|
|
"segments/@time",
|
|
"segments/segment",
|
|
"shorttitle/node()",
|
|
"snippet",
|
|
"snippet/node()",
|
|
"source",
|
|
"sourceAddress",
|
|
"sourceAddress and destinationAddress",
|
|
"string(../@daddr)",
|
|
"string(../@form)",
|
|
"string(../@page)",
|
|
"string(../@saddr)",
|
|
"string(info/title)",
|
|
"string(page/request/canonicalnear) != ''",
|
|
"string(page/request/near) != ''",
|
|
"string-length($address) > $linewidth",
|
|
"structured/@total - $details",
|
|
"structured/source",
|
|
"structured/source[@name]",
|
|
"substring($address, 1, $linewidth - 3)",
|
|
"substring-after($str, $c)",
|
|
"substring-after(icon/@image, '/mapfiles/marker')",
|
|
"substring-before($str, $c)",
|
|
"tagline/node()",
|
|
"targetedlocation",
|
|
"title",
|
|
"title/node()",
|
|
"true()",
|
|
"url",
|
|
"visibleurl"
|
|
];
|
|
|
|
function testParse() {
|
|
for (var i = 0; i < expr.length; ++i) {
|
|
assert(expr[i], xpathParse(expr[i]));
|
|
}
|
|
}
|
|
|
|
var numExpr = [
|
|
/* number expressions */
|
|
[ "1+1", 2 ],
|
|
[ "floor( -3.1415 )", -4 ],
|
|
[ "-5 mod -2", -1 ],
|
|
[ "-5 mod 2", -1 ],
|
|
[ "5 mod -2", 1 ],
|
|
[ "5 mod 2", 1 ],
|
|
[ "ceiling( 3.1415 )", 4.0 ],
|
|
[ "floor( 3.1415 )", 3.0 ],
|
|
[ "ceiling( -3.1415 )", -3.0 ],
|
|
/* string expressions */
|
|
[ "substring('12345', -42, 1 div 0)", "12345" ],
|
|
[ "normalize-space( ' qwerty ' )", "qwerty" ],
|
|
[ "contains('1234567890','9')", true ],
|
|
[ "contains('1234567890','1')", true ],
|
|
[ "'Hello World!'", 'Hello World!' ],
|
|
[ "substring('12345', 1.5, 2.6)", "234" ],
|
|
[ "substring('12345', 0, 3)", "12" ],
|
|
/* string expressions (Japanese) */
|
|
[ "substring('\u3042\u3044\u3046\u3048\u304a', -42, 1 div 0)",
|
|
"\u3042\u3044\u3046\u3048\u304a" ],
|
|
[ "normalize-space( ' \u3044\u308d\u306f\u306b\u307b\u3078\u3068 ' )",
|
|
"\u3044\u308d\u306f\u306b\u307b\u3078\u3068" ],
|
|
[ "contains('\u5357\u7121\u5999\u6cd5\u9023\u83ef\u7d4c','\u7d4c')",
|
|
true ],
|
|
[ "contains('\u5357\u7121\u5999\u6cd5\u9023\u83ef\u7d4c','\u5357')",
|
|
true ],
|
|
[ "'\u3053\u3093\u306b\u3061\u306f\u3001\u4e16\u754c\uff01'",
|
|
'\u3053\u3093\u306b\u3061\u306f\u3001\u4e16\u754c\uff01' ],
|
|
[ "substring('\uff11\uff12\uff13\uff14\uff15', 1.5, 2.6)",
|
|
"\uff12\uff13\uff14" ],
|
|
[ "substring('\uff11\uff12\uff13\uff14\uff15', 0, 3)",
|
|
"\uff11\uff12" ],
|
|
/* variables */
|
|
[ "$foo", 'bar', { foo: 'bar' } ],
|
|
[ "$foo", 100, { foo: 100 } ],
|
|
[ "$foo", true, { foo: true } ],
|
|
[ "$foo + 1", 101, { foo: 100 } ],
|
|
/* variables (Japanese) */
|
|
[ "$\u307b\u3052", '\u307b\u3048', { \u307b\u3052: '\u307b\u3048' } ],
|
|
[ "$\u307b\u3052", 100, { \u307b\u3052: 100 } ],
|
|
[ "$\u307b\u3052", true, { \u307b\u3052: true } ],
|
|
[ "$\u307b\u3052 + 1", 101, { \u307b\u3052: 100 } ],
|
|
/* functions */
|
|
// function id() with string argument
|
|
[ "count(id('test1'))", 1 ],
|
|
// function id() with node-set argument
|
|
[ "count(id(//*[@id='testid']))", 1 ],
|
|
/* union expressions */
|
|
[ "count(//*[@id='u1'])", 1 ],
|
|
[ "count(//*[@class='u'])", 3 ],
|
|
[ "count(//*[@id='u1']|//*[@id='u2'])", 2 ],
|
|
[ "count(//*[@id='u1']|//*[@class='u'])", 3 ],
|
|
[ "count(//*[@class='u']|//*[@class='u'])", 3 ],
|
|
[ "count(//*[@class='u']|//*[@id='u1'])", 3 ]
|
|
];
|
|
|
|
function testEval() {
|
|
for (var i = 0; i < numExpr.length; ++i) {
|
|
var ctx = new ExprContext(document.body);
|
|
var e = numExpr[i];
|
|
if (e[2]) {
|
|
for (var k in e[2]) {
|
|
var v = e[2][k];
|
|
if (typeof v == 'number') {
|
|
ctx.setVariable(k, new NumberValue(v));
|
|
} else if (typeof v == 'string') {
|
|
ctx.setVariable(k, new StringValue(v));
|
|
} else if (typeof v == 'boolean') {
|
|
ctx.setVariable(k, new BooleanValue(v));
|
|
}
|
|
}
|
|
}
|
|
|
|
var result = xpathParse(e[0]).evaluate(ctx);
|
|
if (typeof e[1] == 'number') {
|
|
assertEquals(e[0], e[1], result.numberValue());
|
|
} else if (typeof e[1] == 'string') {
|
|
assertEquals(e[0], e[1], result.stringValue());
|
|
} else if (typeof e[1] == 'boolean') {
|
|
assertEquals(e[0], e[1], result.booleanValue());
|
|
}
|
|
}
|
|
}
|
|
|
|
// For the following axis expressions, we need full control over the
|
|
// entire document, so we cannot evaluate them against document.body,
|
|
// but use our own XML document here. We verify that they give the
|
|
// right results by counting the nodes in their result node sets. For
|
|
// the axes that contain only one node, we check that we found the
|
|
// right node using the id. For axes that contain elements, we only
|
|
// count the elements, so we don't have to worry about whitespace
|
|
// normalization for the text nodes.
|
|
var axisTests = [
|
|
[ "count(//*[@id='self']/ancestor-or-self::*)", 3 ],
|
|
[ "count(//*[@id='self']/ancestor::*)", 2 ],
|
|
[ "count(//*[@id='self']/attribute::node())", 1 ],
|
|
[ "count(//*[@id='self']/child::*)", 1 ],
|
|
[ "count(//*[@id='self']/descendant-or-self::*)", 3 ],
|
|
[ "count(//*[@id='self']/descendant::*)", 2 ],
|
|
[ "count(//*[@id='self']/following-sibling::*)", 3 ],
|
|
[ "count(//*[@id='self']/@*/following-sibling::*)", 0 ],
|
|
[ "count(//*[@id='self']/following::*)", 4 ],
|
|
[ "//*[@id='self']/parent::*/@id", "parent" ],
|
|
[ "count(/parent::*)", 0 ],
|
|
[ "count(//*[@id='self']/preceding-sibling::*)", 1 ],
|
|
[ "count(//*[@id='self']/@*/preceding-sibling::*)", 0 ],
|
|
[ "count(//*[@id='self']/preceding::*)", 2 ],
|
|
[ "//*[@id='self']/self::*/@id", "self" ]
|
|
];
|
|
|
|
function testAxes() {
|
|
var xml = [
|
|
'<page>',
|
|
' <p></p>',
|
|
' <list id="parent">',
|
|
' <item></item>',
|
|
' <item id="self"><d><d></d></d></item>',
|
|
' <item></item>',
|
|
' <item></item>',
|
|
' <item></item>',
|
|
' </list>',
|
|
' <f></f>',
|
|
'</page>'
|
|
].join("");
|
|
var ctx = new ExprContext(xmlParse(xml));
|
|
for (var i = 0; i < axisTests.length; ++i) {
|
|
var e = axisTests[i];
|
|
var result = xpathParse(e[0]).evaluate(ctx);
|
|
if (typeof e[1] == 'number') {
|
|
assertEquals(e[0], e[1], result.numberValue());
|
|
} else if (typeof e[1] == 'string') {
|
|
assertEquals(e[0], e[1], result.stringValue());
|
|
} else if (typeof e[1] == 'boolean') {
|
|
assertEquals(e[0], e[1], result.booleanValue());
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
function testAttributeAsterisk() {
|
|
var ctx = new ExprContext(xmlParse('<x a="1" b="1"><y><z></z></y></x>'));
|
|
var expr = xpathParse("count(/x/@*)");
|
|
assertEquals(2, expr.evaluate(ctx).numberValue());
|
|
}
|
|
|
|
|
|
// eval an xpath expression to a single node
|
|
function evalNodeSet(expr, ctx) {
|
|
var expr1 = xpathParse(expr);
|
|
var e = expr1.evaluate(ctx);
|
|
return e.nodeSetValue();
|
|
}
|
|
|
|
function testEvalDom() {
|
|
var xml = [
|
|
'<page>',
|
|
'<request>',
|
|
'<q>new york</q>',
|
|
'</request>',
|
|
'<location lat="100" lon="200"/>',
|
|
'</page>'
|
|
].join('');
|
|
|
|
doTestEvalDom(xml, 'page', 'location', 'lat', '100', 'lon', '200');
|
|
}
|
|
|
|
function testEvalDomJapanese() {
|
|
var xml = [
|
|
'<\u30da\u30fc\u30b8>',
|
|
'<\u30ea\u30af\u30a8\u30b9\u30c8>',
|
|
'<\u30af\u30a8\u30ea>\u6771\u4eac</\u30af\u30a8\u30ea>',
|
|
'</\u30ea\u30af\u30a8\u30b9\u30c8>',
|
|
'<\u4f4d\u7f6e \u7def\u5ea6="\u4e09\u5341\u4e94" ',
|
|
"\u7d4c\u5ea6='\u767e\u56db\u5341'/>",
|
|
'</\u30da\u30fc\u30b8>'
|
|
].join('');
|
|
|
|
doTestEvalDom(xml, '\u30da\u30fc\u30b8', '\u4f4d\u7f6e',
|
|
'\u7def\u5ea6', '\u4e09\u5341\u4e94',
|
|
'\u7d4c\u5ea6', '\u767e\u56db\u5341');
|
|
}
|
|
|
|
function doTestEvalDom(xml, page, location, lat, latValue, lon, lonValue) {
|
|
var slashPage = '/' + page;
|
|
var slashPageLocationAtLat = '/' + page + '/' + location + '/@' + lat;
|
|
var slashPageLocationAtLon = '/' + page + '/' + location + '/@' + lon;
|
|
|
|
var ctx = new ExprContext(xmlParse(xml));
|
|
var ctx1 = new ExprContext((new DOMParser).parseFromString(xml, 'text/xml'));
|
|
|
|
var ns = evalNodeSet(page, ctx);
|
|
assertEquals(page, ns.length, 1);
|
|
|
|
ns = evalNodeSet(page, ctx1);
|
|
assertEquals(page, ns.length, 1);
|
|
|
|
ns = evalNodeSet(slashPage, ctx);
|
|
assertEquals(slashPage, ns.length, 1);
|
|
|
|
ns = evalNodeSet(slashPage, ctx1);
|
|
assertEquals(slashPage, ns.length, 1);
|
|
|
|
assertEquals('/', evalNodeSet('/', ctx).length, 1);
|
|
assertEquals('/', evalNodeSet('/', ctx1).length, 1);
|
|
|
|
assertEquals('/', evalNodeSet('/', ctx)[0].nodeName, '#document');
|
|
assertEquals('/', evalNodeSet('/', ctx1)[0].nodeName, '#document');
|
|
|
|
assertEquals(slashPage, evalNodeSet(slashPage, ctx)[0].nodeName, page);
|
|
assertEquals(slashPage, evalNodeSet(slashPage, ctx1)[0].nodeName, page);
|
|
|
|
var n = evalNodeSet(slashPageLocationAtLat, ctx)[0];
|
|
assertEquals(slashPageLocationAtLat, n.nodeName, lat);
|
|
assertEquals(slashPageLocationAtLat, n.nodeValue, latValue);
|
|
|
|
n = evalNodeSet(slashPageLocationAtLat, ctx1)[0];
|
|
assertEquals(slashPageLocationAtLat, n.nodeName, lat);
|
|
assertEquals(slashPageLocationAtLat, n.nodeValue, latValue);
|
|
|
|
var n = evalNodeSet(slashPageLocationAtLon, ctx)[0];
|
|
assertEquals(slashPageLocationAtLon, n.nodeName, lon);
|
|
assertEquals(slashPageLocationAtLon, n.nodeValue, lonValue);
|
|
|
|
n = evalNodeSet(slashPageLocationAtLon, ctx1)[0];
|
|
assertEquals(slashPageLocationAtLon, n.nodeName, lon);
|
|
assertEquals(slashPageLocationAtLon, n.nodeValue, lonValue);
|
|
}
|
|
|
|
|
|
// Copyright 2005 Google Inc.
|
|
// All Rights Reserved
|
|
//
|
|
// Debug stuff for the XPath parser. Also used by XSLT.
|
|
|
|
TokenExpr.prototype.toString = function() {
|
|
return this.value;
|
|
}
|
|
|
|
TokenExpr.prototype.parseTree = function(indent) {
|
|
var ret = indent + '[token] ' + this.value + '\n';
|
|
return ret;
|
|
}
|
|
|
|
LocationExpr.prototype.toString = function() {
|
|
var ret = '';
|
|
if (this.absolute) {
|
|
ret += '/';
|
|
}
|
|
for (var i = 0; i < this.steps.length; ++i) {
|
|
if (i > 0) {
|
|
ret += '/';
|
|
}
|
|
ret += this.steps[i].toString();
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
LocationExpr.prototype.parseTree = function(indent) {
|
|
var ret = indent + '[location] ' +
|
|
(this.absolute ? 'absolute' : 'relative') + '\n';
|
|
for (var i = 0; i < this.steps.length; ++i) {
|
|
ret += this.steps[i].parseTree(indent + ' ');
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
StepExpr.prototype.toString = function() {
|
|
var ret = this.axis + '::' + this.nodetest.toString();
|
|
for (var i = 0; i < this.predicate.length; ++i) {
|
|
ret += this.predicate[i].toString();
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
StepExpr.prototype.parseTree = function(indent) {
|
|
var ret = indent + '[step]\n' +
|
|
indent + ' [axis] ' + this.axis + '\n' +
|
|
this.nodetest.parseTree(indent + ' ');
|
|
for (var i = 0; i < this.predicate.length; ++i) {
|
|
ret += this.predicate[i].parseTree(indent + ' ');
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
NodeTestAny.prototype.toString = function() {
|
|
return 'node()';
|
|
}
|
|
|
|
NodeTestAny.prototype.parseTree = function(indent) {
|
|
return indent + '[nodetest] ' + this.toString() + '\n';
|
|
}
|
|
|
|
NodeTestElement.prototype.toString = function() {
|
|
return '*';
|
|
}
|
|
|
|
NodeTestElement.prototype.parseTree = NodeTestAny.prototype.parseTree;
|
|
|
|
NodeTestText.prototype.toString = function() {
|
|
return 'text()';
|
|
}
|
|
|
|
NodeTestText.prototype.parseTree = NodeTestAny.prototype.parseTree;
|
|
|
|
NodeTestComment.prototype.toString = function() {
|
|
return 'comment()';
|
|
}
|
|
|
|
NodeTestComment.prototype.parseTree = NodeTestAny.prototype.parseTree;
|
|
|
|
NodeTestPI.prototype.toString = function() {
|
|
return 'processing-instruction()';
|
|
}
|
|
|
|
NodeTestPI.prototype.parseTree = NodeTestAny.prototype.parseTree;
|
|
|
|
NodeTestNC.prototype.toString = function() {
|
|
return this.nsprefix + ':*';
|
|
}
|
|
|
|
NodeTestNC.prototype.parseTree = NodeTestAny.prototype.parseTree;
|
|
|
|
NodeTestName.prototype.toString = function() {
|
|
return this.name;
|
|
}
|
|
|
|
NodeTestName.prototype.parseTree = NodeTestAny.prototype.parseTree;
|
|
|
|
PredicateExpr.prototype.toString = function() {
|
|
var ret = '[' + this.expr.toString() + ']';
|
|
return ret;
|
|
}
|
|
|
|
PredicateExpr.prototype.parseTree = function(indent) {
|
|
var ret = indent + '[predicate]\n' + this.expr.parseTree(indent + ' ');
|
|
return ret;
|
|
}
|
|
|
|
FunctionCallExpr.prototype.toString = function() {
|
|
var ret = this.name.value + '(';
|
|
for (var i = 0; i < this.args.length; ++i) {
|
|
if (i > 0) {
|
|
ret += ', ';
|
|
}
|
|
ret += this.args[i].toString();
|
|
}
|
|
ret += ')';
|
|
return ret;
|
|
}
|
|
|
|
FunctionCallExpr.prototype.parseTree = function(indent) {
|
|
var ret = indent + '[function call] ' + this.name.value + '\n';
|
|
for (var i = 0; i < this.args.length; ++i) {
|
|
ret += this.args[i].parseTree(indent + ' ');
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
UnionExpr.prototype.toString = function() {
|
|
return this.expr1.toString() + ' | ' + this.expr2.toString();
|
|
}
|
|
|
|
UnionExpr.prototype.parseTree = function(indent) {
|
|
var ret = indent + '[union]\n' +
|
|
this.expr1.parseTree(indent + ' ') +
|
|
this.expr2.parseTree(indent + ' ');
|
|
return ret;
|
|
}
|
|
|
|
PathExpr.prototype.toString = function() {
|
|
var ret = '{path: {' + this.filter.toString() + '} {' + this.rel.toString() +
|
|
'}}';
|
|
return ret;
|
|
}
|
|
|
|
PathExpr.prototype.parseTree = function(indent) {
|
|
var ret = indent + '[path]\n' +
|
|
indent + '- filter:\n' +
|
|
this.filter.parseTree(indent + ' ') +
|
|
indent + '- location path:\n' +
|
|
this.rel.parseTree(indent + ' ');
|
|
return ret;
|
|
}
|
|
|
|
FilterExpr.prototype.toString = function() {
|
|
var ret = this.expr.toString();
|
|
for (var i = 0; i < this.predicate.length; ++i) {
|
|
ret += this.predicate[i].toString();
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
FilterExpr.prototype.parseTree = function(indent) {
|
|
var ret = indent + '[filter]\n' +
|
|
indent + '- expr:\n' +
|
|
this.expr.parseTree(indent + ' ');
|
|
indent + '- predicates:\n';
|
|
for (var i = 0; i < this.predicate.length; ++i) {
|
|
ret += this.predicate[i].parseTree(indent + ' ');
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
UnaryMinusExpr.prototype.toString = function() {
|
|
return '-' + this.expr.toString();
|
|
}
|
|
|
|
UnaryMinusExpr.prototype.parseTree = function(indent) {
|
|
return indent + '[unary] -\n' + this.expr.parseTree(indent + ' ');
|
|
}
|
|
|
|
BinaryExpr.prototype.toString = function() {
|
|
return this.expr1.toString() + ' ' + this.op.value + ' ' +
|
|
this.expr2.toString();
|
|
}
|
|
|
|
BinaryExpr.prototype.parseTree = function(indent) {
|
|
return indent + '[binary] ' + this.op.value + '\n' +
|
|
this.expr1.parseTree(indent + ' ') +
|
|
this.expr2.parseTree(indent + ' ');
|
|
}
|
|
|
|
LiteralExpr.prototype.toString = function() {
|
|
return '"' + this.value + '"';
|
|
}
|
|
|
|
LiteralExpr.prototype.parseTree = function(indent) {
|
|
return indent + '[literal] ' + this.toString() + '\n';
|
|
}
|
|
|
|
NumberExpr.prototype.toString = function() {
|
|
return '' + this.value;
|
|
}
|
|
|
|
NumberExpr.prototype.parseTree = function(indent) {
|
|
return indent + '[number] ' + this.toString() + '\n';
|
|
}
|
|
|
|
VariableExpr.prototype.toString = function() {
|
|
return '$' + this.name;
|
|
}
|
|
|
|
VariableExpr.prototype.parseTree = function(indent) {
|
|
return indent + '[variable] ' + this.toString() + '\n';
|
|
}
|
|
|
|
XNode.prototype.toString = function() {
|
|
return this.nodeName;
|
|
}
|
|
|
|
ExprContext.prototype.toString = function() {
|
|
return '[' + this.position + '/' + this.nodelist.length + '] ' +
|
|
this.node.nodeName;
|
|
}
|
|
|
|
function Value_toString() {
|
|
return this.type + ': ' + this.value;
|
|
}
|
|
|
|
StringValue.prototype.toString = Value_toString;
|
|
NumberValue.prototype.toString = Value_toString;
|
|
BooleanValue.prototype.toString = Value_toString;
|
|
NodeSetValue.prototype.toString = Value_toString;
|
|
|
|
|
|
// Copyright 2005-2006 Google
|
|
//
|
|
// Author: Steffen Meschkat <mesch@google.com>
|
|
//
|
|
// A very simple logging facility, used in test/xpath.html.
|
|
|
|
var logging__ = true;
|
|
|
|
function Log() {};
|
|
|
|
Log.lines = [];
|
|
|
|
Log.write = function(s) {
|
|
if (logging__) {
|
|
this.lines.push(xmlEscapeText(s));
|
|
this.show();
|
|
}
|
|
};
|
|
|
|
// Writes the given XML with every tag on a new line.
|
|
Log.writeXML = function(xml) {
|
|
if (logging__) {
|
|
var s0 = xml.replace(/</g, '\n<');
|
|
var s1 = xmlEscapeText(s0);
|
|
var s2 = s1.replace(/\s*\n(\s|\n)*/g, '<br/>');
|
|
this.lines.push(s2);
|
|
this.show();
|
|
}
|
|
}
|
|
|
|
// Writes without any escaping
|
|
Log.writeRaw = function(s) {
|
|
if (logging__) {
|
|
this.lines.push(s);
|
|
this.show();
|
|
}
|
|
}
|
|
|
|
Log.clear = function() {
|
|
if (logging__) {
|
|
var l = this.div();
|
|
l.innerHTML = '';
|
|
this.lines = [];
|
|
}
|
|
}
|
|
|
|
Log.show = function() {
|
|
var l = this.div();
|
|
l.innerHTML += this.lines.join('<br/>') + '<br/>';
|
|
this.lines = [];
|
|
l.scrollTop = l.scrollHeight;
|
|
}
|
|
|
|
Log.div = function() {
|
|
var l = document.getElementById('log');
|
|
if (!l) {
|
|
l = document.createElement('div');
|
|
l.id = 'log';
|
|
l.style.position = 'absolute';
|
|
l.style.right = '5px';
|
|
l.style.top = '5px';
|
|
l.style.width = '250px';
|
|
l.style.height = '150px';
|
|
l.style.overflow = 'auto';
|
|
l.style.backgroundColor = '#f0f0f0';
|
|
l.style.border = '1px solid gray';
|
|
l.style.fontSize = '10px';
|
|
l.style.padding = '5px';
|
|
document.body.appendChild(l);
|
|
}
|
|
return l;
|
|
}
|
|
|
|
// Reimplement the log functions from util.js to use the simple log.
|
|
function xpathLog(msg) {
|
|
Log.write(msg);
|
|
};
|
|
function xsltLog(msg) {};
|
|
function xsltLogXml(msg) {};
|
|
|
|
|
|
// Copyright 2005 Google Inc.
|
|
// All Rights Reserved
|
|
//
|
|
// Tests for the XPath parser. To run the test, open the file from the
|
|
// file system. No server support is required.
|
|
//
|
|
//
|
|
// Author: Steffen Meschkat <mesch@google.com>
|
|
|
|
logging = true;
|
|
xpathdebug = true;
|
|
|
|
function load_expr() {
|
|
var s = document.getElementById('s');
|
|
for (var i = 0; i < expr.length; ++i) {
|
|
var o = new Option(expr[i].replace(/>/,'>').replace(/</,'<'));
|
|
s.options[s.options.length] = o;
|
|
}
|
|
s.selectedIndex = 0;
|
|
}
|
|
|
|
function xpath_test(form) {
|
|
Log.clear();
|
|
try {
|
|
var i = form.cases.selectedIndex;
|
|
var options = form.cases.options;
|
|
|
|
var text = options[i].value;
|
|
Log.writeRaw('<tt><b>' + text + '</b></tt>');
|
|
|
|
var expr = xpathParse(text);
|
|
Log.writeRaw('<tt><b>' + text + '</b></tt>');
|
|
Log.writeRaw('<pre>' + expr.parseTree('') + '</pre>');
|
|
|
|
options[i].selected = false;
|
|
if (i < options.length - 1) {
|
|
options[i+1].selected = true;
|
|
} else {
|
|
options[0].selected = true;
|
|
}
|
|
|
|
} catch (e) {
|
|
Log.write('EXCEPTION ' + e);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
node10.onload(null);
|
|
|
|
|
|
|
|
node11.onsubmit(null);
|
|
|