1 | var ElementType = require("./ElementType.js");
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2 |
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3 | function getTest (checkVal) {
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4 | return function (value) { return value === checkVal; };
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5 | }
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6 |
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7 | var arrayPush = Array.prototype.push;
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8 | function filterArray(test, arr, recurse, limit){
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9 | var result = [], childs;
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10 |
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11 | for(var i = 0, j = arr.length; i < j; i++){
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12 | if(test(arr[i])){
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13 | result.push(arr[i]);
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14 | if(--limit <= 0) break;
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15 | }
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16 |
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17 | if(recurse && (childs = arr[i].children)){
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18 | childs = filterArray(test, childs, recurse, limit);
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19 | arrayPush.apply(result, childs);
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20 | limit -= childs.length;
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21 | if(limit <= 0) break;
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22 | }
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23 | }
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24 | return result;
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25 | }
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26 |
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27 | function filter(test, element, recurse, limit){
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28 | if(recurse !== false) recurse = true;
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29 | if(isNaN(limit)) limit = 1/0;
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30 | if(!Array.isArray(element)){
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31 | element = [element];
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32 | }
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33 | return filterArray(test, element, recurse, limit);
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34 | }
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35 |
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36 | module.exports = {
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37 | testElement: function testElement(options, element) {
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38 | var type = element.type;
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39 |
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40 | for(var key in options){
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41 | if(key === "tag_name"){
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42 | if(type !== ElementType.Tag && type !== ElementType.Script && type !== ElementType.Style) return false;
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43 | if(!options.tag_name(element.name)) return false;
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44 | } else if(key === "tag_type") {
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45 | if(!options.tag_type(type)) return false;
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46 | } else if(key === "tag_contains") {
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47 | if(type !== ElementType.Text && type !== ElementType.Comment && type !== ElementType.Directive) return false;
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48 | if(!options.tag_contains(element.data)) return false;
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49 | } else if(!element.attribs || !options[key](element.attribs[key]))
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50 | return false;
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51 | }
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52 |
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53 | return true;
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54 | },
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55 |
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56 | getElements: function(options, element, recurse, limit){
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57 | for(var key in options){
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58 | if(typeof options[key] !== "function"){
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59 | options[key] = getTest(options[key]);
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60 | }
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61 | }
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62 |
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63 | return filter(this.testElement.bind(null, options), element, recurse, limit);
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64 | },
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65 |
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66 | getElementById: function(id, element, recurse) {
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67 | var result;
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68 | if(typeof id === "function"){
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69 | result = filter(function(elem){
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70 | return elem.attribs && id(elem.attribs);
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71 | }, element, recurse, 1);
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72 | }
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73 | else{
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74 | result = filter(function(elem){
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75 | return elem.attribs && elem.attribs.id === id;
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76 | }, element, recurse, 1);
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77 | }
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78 | return result.length ? result[0] : null;
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79 | },
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80 |
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81 | getElementsByTagName: function(name, element, recurse, limit){
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82 | if(typeof name === "function") return filter(function(elem){
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83 | var type = elem.type;
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84 | if(type !== ElementType.Tag && type !== ElementType.Script && type !== ElementType.Style) return false;
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85 | return name(elem.name);
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86 | }, element, recurse, limit);
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87 |
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88 | return filter(function(elem){
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89 | var type = elem.type;
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90 | if(type !== ElementType.Tag && type !== ElementType.Script && type !== ElementType.Style) return false;
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91 | return elem.name === name;
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92 | }, element, recurse, limit);
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93 | },
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94 |
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95 | getElementsByTagType: function(type, element, recurse, limit){
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96 | if(typeof type === "function"){
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97 | return filter(function(elem){return type(elem.type);}, element, recurse, limit);
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98 | }
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99 | else return filter(function(elem){return elem.type === type;}, element, recurse, limit);
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100 | },
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101 |
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102 | getInnerHTML: function(elem){
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103 | if(!elem.children) return "";
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104 |
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105 | var childs = elem.children,
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106 | childNum = childs.length,
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107 | ret = "";
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108 |
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109 | for(var i = 0; i < childNum; i++){
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110 | ret += this.getOuterHTML(childs[i]);
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111 | }
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112 |
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113 | return ret;
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114 | },
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115 |
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116 | getOuterHTML: function(elem){
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117 | var type = elem.type;
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118 |
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119 | if(type === ElementType.Text) return elem.data;
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120 | if(type === ElementType.Comment) return "<!--" + elem.data + "-->";
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121 |
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122 | var ret = "<" + elem.name;
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123 |
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124 | var value;
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125 | for(var name in elem.attribs){
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126 | value = elem.attribs[name];
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127 | ret += " " + name + "=";
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128 |
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129 | if(/^[^\s"\'\`\=\<\>]+$/.test(value)) ret += value;
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130 | else if(value.indeOf("\"") !== -1) ret += "'" + value + "'";
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131 | else ret += "\"" + value + "\"";
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132 | }
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133 |
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134 | if(type === ElementType.Directive) return ret + ">";
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135 | if(type === ElementType.Tag && !elem.children) return ret + " />";
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136 |
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137 | return ">" + ret + this.getInnerHTML(elem) + "</" + elem.name + ">";
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138 | }
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139 | }; |
\ | No newline at end of file |