comunic/3rdparty/pdf.js/examples/node/domparsermock.js
2016-11-19 12:08:12 +01:00

108 lines
3.0 KiB
JavaScript
Executable File

/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
/* Any copyright is dedicated to the Public Domain.
* http://creativecommons.org/publicdomain/zero/1.0/ */
// Dummy XML Parser
function DOMNodeMock(nodeName, nodeValue) {
this.nodeName = nodeName;
this.nodeValue = nodeValue;
Object.defineProperty(this, 'parentNode', {value: null, writable: true});
}
DOMNodeMock.prototype = {
get firstChild() {
return this.childNodes[0];
},
get nextSibling() {
var index = this.parentNode.childNodes.indexOf(this);
return this.parentNode.childNodes[index + 1];
},
get textContent() {
if (!this.childNodes) {
return this.nodeValue || '';
}
return this.childNodes.map(function (child) {
return child.textContent;
}).join('');
},
hasChildNodes: function () {
return this.childNodes && this.childNodes.length > 0;
}
};
function decodeXML(text) {
if (text.indexOf('&') < 0) {
return text;
}
return text.replace(/&(#(x[0-9a-f]+|\d+)|\w+);/gi, function (all, entityName, number) {
if (number) {
return String.fromCharCode(number[0] === 'x' ? parseInt(number.substring(1), 16) : +number);
}
switch (entityName) {
case 'amp':
return '&';
case 'lt':
return '<';
case 'gt':
return '>';
case 'quot':
return '\"';
case 'apos':
return '\'';
}
return '&' + entityName + ';';
});
}
function DOMParserMock() {};
DOMParserMock.prototype = {
parseFromString: function (content) {
content = content.replace(/<\?[\s\S]*?\?>|<!--[\s\S]*?-->/g, '').trim();
var nodes = [];
content = content.replace(/>([\s\S]+?)</g, function (all, text) {
var i = nodes.length;
var node = new DOMNodeMock('#text', decodeXML(text));
nodes.push(node);
if (node.textContent.trim().length === 0) {
return '><'; // ignoring whitespaces
}
return '>' + i + ',<';
});
content = content.replace(/<!\[CDATA\[([\s\S]*?)\]\]>/g, function (all, text) {
var i = nodes.length;
var node = new DOMNodeMock('#text', text);
nodes.push(node);
return i + ',';
});
var lastLength;
do {
lastLength = nodes.length;
content = content.replace(/<([\w\:]+)((?:[\s\w:=]|'[^']*'|"[^"]*")*)(?:\/>|>([\d,]*)<\/[^>]+>)/g,
function (all, name, attrs, content) {
var i = nodes.length;
var node = new DOMNodeMock(name);
var children = [];
if (content) {
content = content.split(',');
content.pop();
content.forEach(function (child) {
var childNode = nodes[+child];
childNode.parentNode = node;
children.push(childNode);
})
}
node.childNodes = children;
nodes.push(node);
return i + ',';
});
} while(lastLength < nodes.length);
return {
documentElement: nodes.pop()
};
}
};
exports.DOMParserMock = DOMParserMock;