1 | /* |
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2 | XPath.js, an JavaScript implementation of XML Path Language (XPath) Version 1.0 |
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3 | Copyright (C) 2008 Henrik Lindqvist <henrik.lindqvist@llamalab.com> |
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4 | |
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5 | This library is free software: you can redistribute it and/or modify |
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6 | it under the terms of the GNU Lesser General Public License as published |
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7 | by the Free Software Foundation, either version 3 of the License, or |
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8 | (at your option) any later version. |
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9 | |
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10 | This library is distributed in the hope that it will be useful, |
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11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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13 | GNU Lesser General Public License for more details. |
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14 | |
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15 | You should have received a copy of the GNU Lesser General Public License |
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16 | along with this program. If not, see <http://www.gnu.org/licenses/>. |
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17 | */ |
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18 | (function (w, d, f) { |
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19 | |
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20 | |
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21 | function XPath (e) { |
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22 | this.e = e; |
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23 | this.i = 0; |
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24 | this.js = [ 'with(XPath){return ', '}' ]; |
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25 | this.expression(1, 1) || this.error(); |
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26 | //console.log(this.js.join('')); |
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27 | return new Function('n', 'nsr', this.js.join('')); |
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28 | } |
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29 | XPath.ie = /MSIE/.test(navigator.userAgent); |
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30 | XPath.prototype = { |
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31 | match : function (rx, x) { |
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32 | var m, r; |
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33 | if ( !(m = rx.exec(this.e.substr(this.i))) |
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34 | || (typeof x == 'number' && !(r = m[x])) |
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35 | || (typeof x == 'object' && !(r = x[m[1]]))) return false; |
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36 | this.m = m; |
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37 | this.i += m[0].length; |
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38 | return r || m; |
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39 | }, |
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40 | error : function (m) { |
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41 | m = (m || 'Syntax error')+' at index '+this.i+': '+this.e.substr(this.i); |
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42 | var e; |
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43 | try { e = new XPathException(51, m) } |
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44 | catch (x) { e = new Error(m) } |
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45 | throw e; |
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46 | }, |
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47 | step : function (l, r, s, n) { |
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48 | var i = 3; |
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49 | if (this.match(/^(\/\/?|\.\.?|@)\s*/, 1)) { |
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50 | switch (this.m[1]) { |
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51 | case '/': |
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52 | if (s) this.error(); |
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53 | if (!n) return this.step(l, r, 1); |
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54 | this.js.splice(l, 0, ' axis(axes["','document-root','"],'); |
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55 | i += this.nodeTypes.node.call(this, l + i); |
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56 | s = 1; |
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57 | break; |
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58 | case '//': |
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59 | if (s) this.error(); |
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60 | this.js.splice(l, 0, ' axis(axes["','descendant-or-self','"],'); |
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61 | i += this.nodeTypes.node.call(this, l + i); |
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62 | s = 1; |
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63 | break; |
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64 | case '.': |
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65 | if (!s && !n) this.error(); |
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66 | this.js.splice(l, 0, ' axis(axes["','self','"],'); |
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67 | i += this.nodeTypes.node.call(this, l + i); |
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68 | s = 0; |
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69 | break; |
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70 | case '..': |
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71 | if (!s && !n) this.error(); |
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72 | this.js.splice(l, 0, ' axis(axes["','parent','"],'); |
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73 | i += this.nodeTypes.node.call(this, l + i); |
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74 | s = 0; |
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75 | break; |
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76 | case '@': |
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77 | if (!s && !n) this.error(); |
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78 | this.js.splice(l, 0, ' axis(axes["','attribute','"],'); |
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79 | i += this.nodeTest(l + i, 'node') || this.error('Missing nodeTest after @'); |
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80 | s = 0; |
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81 | } |
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82 | } |
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83 | else if (!s && !n) return s ? this.error() : 0; |
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84 | else if (this.match(/^([a-z]+(?:-[a-z]+)*)\s*::\s*/, XPath.axes)) { |
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85 | this.js.splice(l, 0, ' axis(axes["',this.m[1],'"],'); |
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86 | i += this.nodeTest(l + i, (this.m[1]=='attribute')?'node':'element') || this.error('Missing nodeTest after ::'); |
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87 | s = 0; |
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88 | } |
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89 | else if (i = this.nodeTest(l, 'element')) { |
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90 | this.js.splice(l, 0, ' axis(axes["','child','"],'); |
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91 | i += 3; |
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92 | s = 0; |
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93 | } |
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94 | else return 0; |
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95 | for (var j; j = this.predicate(l + i); i += j); |
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96 | if (n) this.js.splice(r + i++, 0, n); |
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97 | i += this.step(l, r + i, s); |
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98 | this.js.splice(r + i++, 0, ')'); |
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99 | return i; |
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100 | }, |
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101 | expression : function (l, r, p) { |
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102 | var o, i = this.operand(l); |
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103 | while (o = this.match(/^(or|and|!?=|[<>]=?|[|*+-]|div|mod)\s*/, this.operators)) { |
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104 | if (p && p[0] >= o[0]) { |
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105 | this.i -= this.m[0].length; |
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106 | break; |
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107 | } |
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108 | this.js.splice(l, 0, o[1]); |
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109 | i++; |
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110 | this.js.splice(l + i++, 0, o[2]); |
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111 | i += this.expression(l + i, r, o) || this.error('Missing operand'); |
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112 | this.js.splice(l + i++, 0, o[3]); |
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113 | } |
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114 | return i; |
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115 | }, |
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116 | operand : function (l) { |
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117 | if (this.match(/^(-?(?:[0-9]+(?:\.[0-9]+)?|\.[0-9]+)|"[^"]*"|'[^']*')\s*/, 1)) { |
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118 | this.js.splice(l, 0, this.m[1]); |
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119 | return 1; |
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120 | } |
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121 | var fn; |
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122 | if (fn = this.match(/^([a-z]+(?:-[a-z]+)*)\s*\(\s*/, this.functions)) { |
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123 | var i = 1, j; |
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124 | this.js.splice(l, 0, fn[1]); |
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125 | do { |
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126 | if (j) this.js.splice(l + i++, 0, ','); |
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127 | i += (j = this.expression(l + i, l + i)); |
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128 | } while (j && this.match(/^,\s*/)); |
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129 | this.match(/^\)\s*/) || this.error('Missing ('); |
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130 | if (fn[0]) { |
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131 | if (j) this.js.splice(l + i++, 0, ','); |
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132 | this.js.splice(l + i++, 0, fn[0]); |
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133 | } |
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134 | if (fn[2]) this.js.splice(l + i++, 0, fn[2]); |
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135 | else if (j > 1) this.error('Function has arguments'); |
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136 | i += this.step(l, l + i); |
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137 | return i; |
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138 | } |
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139 | if (this.match(/^\(\s*/)) { |
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140 | var i = 1; |
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141 | this.js.splice(l, 0, '('); |
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142 | i += this.expression(l + i, l + i); |
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143 | this.match(/^\)\s*/) || this.error('Missing )'); |
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144 | this.js.splice(l + i++, ')'); |
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145 | return i; |
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146 | } |
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147 | return this.step(l, l, 0, '[n]'); |
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148 | }, |
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149 | operators : { |
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150 | '|' : [1,'union(',',',')'], |
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151 | 'or' : [1,'bool(',')||bool(',')'], |
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152 | 'and' : [2,'bool(',')&&bool(',')'], |
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153 | '=' : [3,'compare(eq,',',',')'], |
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154 | '!=' : [3,'compare(ne,',',',')'], |
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155 | '<' : [4,'compare(lt,',',',')'], |
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156 | '>' : [4,'compare(gt,',',',')'], |
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157 | '<=' : [4,'compare(le,',',',')'], |
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158 | '>=' : [4,'compare(ge,',',',')'], |
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159 | '+' : [5,'number(',')+number(',')'], |
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160 | '-' : [5,'number(',')-number(',')'], |
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161 | '*' : [6,'number(',')*number(',')'], |
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162 | 'div' : [6,'number(',')/number(',')'], |
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163 | 'mod' : [6,'number(',')%number(',')'] |
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164 | }, |
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165 | functions : { |
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166 | // Node Set |
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167 | 'last' : [0,'nl.length'], |
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168 | 'position' : [0,'(i+1)'], |
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169 | 'count' : ['nl','(','.length||0)'], |
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170 | 'id' : ['n','id(',')'], |
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171 | 'local-name' : ['nl','localName(',')'], |
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172 | 'namespace-uri' : ['nl','namespaceURI(',')'], |
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173 | 'name' : ['nl','qName(',')'], |
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174 | // String |
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175 | 'string' : ['n','string(',')'], |
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176 | 'concat' : [0,'concat(',')'], |
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177 | 'starts-with' : [0,'startsWith(',')'], |
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178 | 'contains' : [0,'contains(',')'], |
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179 | 'substring-before' : [0,'substringBefore(',')'], |
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180 | 'substring-after' : [0,'substringAfter(',')'], |
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181 | 'substring' : [0,'substring(',')'], |
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182 | 'string-length' : ['n','string(',').length'], |
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183 | 'normalize-space' : ['n','normalizeSpace(',')'], |
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184 | 'translate' : [0,'translate(',')'], |
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185 | // Boolean |
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186 | 'boolean' : [0,'bool(',')'], |
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187 | 'not' : [0,'!bool(',')'], |
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188 | 'true' : [0,'true '], |
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189 | 'false' : [0,'false '], |
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190 | // 'lang' : [], |
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191 | // Number |
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192 | 'number' : ['n','number(',')'], |
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193 | 'floor' : [0,'Math.floor(number(','))'], |
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194 | 'ceiling' : [0,'Math.ceil(number(','))'], |
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195 | 'round' : [0,'Math.round(number(','))'], |
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196 | 'sum' : [0,'sum(',')'] |
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197 | }, |
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198 | predicate : function (l) { |
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199 | var i = 0; |
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200 | if (this.match(/^\[\s*/)) { |
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201 | if (i = this.expression(l, l)) { |
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202 | this.js.splice(l, 0, 'function(n,i,nl){with(XPath){var r='); |
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203 | i++; |
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204 | this.js.splice(l + i++, 0, ';return typeof r=="number"?Math.round(r)==i+1:bool(r)}},'); |
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205 | } |
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206 | this.match(/^\]\s*/) || this.error('Missing ]'); |
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207 | } |
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208 | return i; |
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209 | }, |
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210 | nodeTest : function (l, t) { |
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211 | var fn; |
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212 | if (fn = this.match(/^([a-z]+(?:-[a-z]+)*)\(([^)]*)\)\s*/, this.nodeTypes)) |
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213 | return fn.call(this, l, this.m[2]); |
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214 | if (this.match(/^\*\s*/)) |
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215 | return this.nodeTypes[t].call(this, l); |
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216 | return this.nodeName(l) |
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217 | }, |
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218 | nodeType : function (l, t) { |
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219 | this.js.splice(l, 0, 'function(n){return n.nodeType==',t,'},'); |
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220 | return 3; |
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221 | }, |
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222 | nodeTypes : { |
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223 | 'node' : function (l) { |
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224 | this.js.splice(l, 0, 'null,'); |
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225 | return 1; |
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226 | }, |
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227 | 'element' : function (l) { |
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228 | return this.nodeType(l, 1); |
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229 | }, |
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230 | 'attribute' : function (l) { |
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231 | return this.nodeType(l, 2); |
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232 | }, |
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233 | 'text' : function (l) { |
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234 | return this.nodeType(l, 3); |
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235 | }, |
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236 | 'processing-instruction' : function (l, t) { |
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237 | if (!t) return this.nodeType(l, 7); |
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238 | this.js.splice(l, 0, 'function(n){return n.nodeType==7&&n.target==',t,'},'); |
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239 | return 3; |
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240 | }, |
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241 | 'comment' : function (l) { |
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242 | return this.nodeType(l, 8); |
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243 | } |
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244 | }, |
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245 | nodeName : function (l) { |
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246 | if (!this.match(/^([a-zA-Z_]+(?:-?[a-zA-Z0-9]+)*)(?::([a-zA-Z_]+(?:-?[a-zA-Z0-9]+)*))?\s*/, 1)) |
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247 | return 0; |
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248 | if (this.m[2]) { |
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249 | this.js.splice(l,0,'function(n){if(!nsr)throw new XPathException(14);return "', |
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250 | this.m[2],'"==',XPath.ie?'n.baseName':'n.localName','&&nsr.lookupNamespaceURI("', |
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251 | this.m[1],'")==n.namespaceURI},'); |
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252 | return 7; |
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253 | } |
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254 | else { |
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255 | this.js.splice(l,0,'function(n){return/^',this.m[1],'$/i.test(n.nodeName)},'); |
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256 | return 3; |
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257 | } |
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258 | } |
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259 | }; |
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260 | XPath.order = function (l, r) { |
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261 | var x = l.compareDocumentPosition |
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262 | ? l.compareDocumentPosition(r) |
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263 | : XPath.compareDocumentPosition.call(l, r); |
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264 | if (x & 32) { |
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265 | l = Array.prototype.indexOf.call(l.attributes, l); |
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266 | r = Array.prototype.indexOf.call(r.attributes, r); |
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267 | return (l < r) ? -1 : (l > r) ? 1 : 0; |
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268 | } |
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269 | if (!x) { |
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270 | if (l == r) |
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271 | return 0; |
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272 | if ((l = l.ownerElement) && (r = r.ownerElement)) |
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273 | return XPath.order(l, r); |
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274 | return XPath.ie ? 1 : 0; |
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275 | } |
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276 | return 3 - ((x & 6) || 3); |
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277 | }; |
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278 | // Runtime - Operand |
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279 | XPath.compare = function (fn, l, r) { |
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280 | if (l instanceof Array && r instanceof Array) { |
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281 | var ls = l.map(this.string), rs = r.map(this.string); |
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282 | for (l = ls.length; --l >= 0;) |
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283 | for (r = rs.length; --r >= 0;) |
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284 | if (!fn(ls[l], rs[r])) return false; |
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285 | return true; |
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286 | } |
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287 | if (l instanceof Array) { |
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288 | for (var i = l.length; --i >= 0;) |
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289 | if (!fn(this[typeof r](l[i]), r)) return false; |
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290 | return l.length > 0; |
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291 | } |
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292 | if (r instanceof Array) { |
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293 | for (var i = r.length; --i >= 0;) |
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294 | if (!fn(l, this[typeof l](r[i]))) return false; |
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295 | return r.length > 0; |
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296 | } |
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297 | if (typeof l == 'boolean' || typeof r == 'boolean') |
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298 | return fn(this.bool(l), this.bool(r)); |
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299 | if (typeof l == 'number' || typeof r == 'number') |
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300 | return fn(this.number(l), this.number(r)); |
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301 | return fn(this.string(l), this.string(r)); |
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302 | }; |
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303 | XPath.eq = function (l, r) { return l == r }; |
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304 | XPath.ne = function (l, r) { return l != r }; |
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305 | XPath.lt = function (l, r) { return l < r }; |
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306 | XPath.gt = function (l, r) { return l > r }; |
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307 | XPath.le = function (l, r) { return l <= r }; |
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308 | XPath.ge = function (l, r) { return l >= r }; |
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309 | // Runtime - Node Set |
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310 | XPath.id = function (s, n) { |
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311 | if (arguments.length == 1) n = s; |
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312 | var nl = []; |
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313 | for (var id = this.string(s).split(/\s+/), i = id.length; --i >= 0;) |
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314 | if (s = (n.ownerDocument || n).getElementById(id[i])) |
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315 | nl.push(s); |
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316 | return nl.sort(this.order); |
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317 | }; |
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318 | XPath.localName = new Function ('nl', |
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319 | 'return (nl.length&&nl[0].'+(XPath.ie?'baseName':'localName')+')||""' |
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320 | ); |
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321 | XPath.namespaceURI = function (nl) { |
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322 | return (nl.length && nl[0].namespaceURI) || ''; |
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323 | }; |
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324 | XPath.qName = function (nl) { |
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325 | return (nl.length && nl[0].nodeName) || ''; |
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326 | }; |
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327 | XPath.union = function (a, b) { |
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328 | if (!a.length) return b; |
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329 | if (!b.length) return a; |
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330 | var nl = [], i = a.length - 1, j = b.length - 1; |
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331 | for (;;) { |
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332 | switch (this.order(a[i], b[j])) { |
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333 | case -1: nl.unshift(b[j--]); break; |
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334 | case 0: j--; // fallthru |
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335 | case 1: nl.unshift(a[i--]); break; |
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336 | default: throw new Error('Invalid order'); |
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337 | } |
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338 | if (i < 0) { |
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339 | if (++j > 0) nl.unshift.apply(nl, nl.slice.call(b, 0, j)); |
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340 | break; |
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341 | } |
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342 | if (j < 0) { |
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343 | if (++i > 0) nl.unshift.apply(nl, nl.slice.call(a, 0, i)); |
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344 | break; |
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345 | } |
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346 | } |
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347 | return nl; |
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348 | }; |
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349 | // Runtime - String |
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350 | XPath.string = XPath.object = function (v) { |
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351 | if (v instanceof Array && typeof (v = v[0]) == 'undefined') return ''; |
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352 | if (typeof v == 'string') return v; |
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353 | switch (v.nodeType) { |
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354 | case 1: case 9: case 11: |
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355 | return Array.prototype.map.call(v.childNodes, this.string, this).join(''); |
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356 | // case 3: case 4: case 8: |
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357 | // return v.data || ''; |
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358 | default: |
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359 | return v.nodeValue || ''; |
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360 | } |
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361 | return String(v); |
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362 | }; |
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363 | XPath.concat = function () { |
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364 | return Array.prototype.map.call(arguments, this.string, this).join(''); |
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365 | }; |
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366 | XPath.startsWith = function (a, b) { |
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367 | return this.string(a).substr(0, (b = this.string(b)).length) == b; |
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368 | }; |
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369 | XPath.contains = function (a, b) { |
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370 | return this.string(a).indexOf(this.string(b)) != -1; |
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371 | }; |
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372 | XPath.substringBefore = function (a, b) { |
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373 | a = this.string(a); |
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374 | b = a.indexOf(this.string(b)); |
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375 | return b != -1 ? a.substr(0, b) : ''; |
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376 | }; |
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377 | XPath.substringAfter = function (a, b) { |
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378 | a = this.string(a); b = this.string(b); |
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379 | var i = a.indexOf(b); |
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380 | return i != -1 ? a.substr(i + b.length) : ''; |
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381 | }; |
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382 | XPath.substring = function (s, i, l) { |
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383 | s = this.string(s); |
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384 | i = Math.round(this.number(i)) - 1; |
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385 | return (arguments.length == 2) |
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386 | ? s.substr(i < 0 ? 0 : i) |
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387 | : s.substr(i < 0 ? 0 : i, Math.round(this.number(l)) - Math.max(0, -i)); |
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388 | }; |
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389 | XPath.normalizeSpace = function(s) { |
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390 | return this.string(s).replace(/^\s+/,'').replace(/\s+$/,'').replace(/\s+/g, ' '); |
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391 | }; |
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392 | XPath.translate = function(a, b, c) { |
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393 | a = this.string(a); b = this.string(b); c = this.string(c); |
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394 | var o = [], l = a.length, i = 0, j, x; |
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395 | while (--l >= 0) |
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396 | if ( (j = b.indexOf(x = a.charAt(i++))) == -1 |
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397 | || (x = c.charAt(j))) o.push(x); |
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398 | return o.join(''); |
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399 | }; |
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400 | // Runtime - Boolean |
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401 | XPath.bool = XPath['boolean'] = function (v) { |
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402 | if (typeof v == 'boolean') return v; |
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403 | if (v instanceof Array || typeof v == 'string') return v.length > 0; |
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404 | return Boolean(v); |
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405 | }; |
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406 | // Runtime - Number |
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407 | XPath.number = function (v) { |
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408 | if (v instanceof Array && typeof (v = v[0]) == 'undefined') return 0; |
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409 | if (typeof v == 'number') return v; |
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410 | if (typeof v == 'boolean') return v ? 1 : 0; |
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411 | return Number(this.string(v)); |
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412 | }; |
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413 | XPath.sum = function (nl) { |
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414 | var r = 0, i = nl.length; |
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415 | while (--i >= 0) r += this.number(nl[i]); |
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416 | return r; |
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417 | }; |
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418 | // Runtime - Axis |
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419 | XPath.walk = function (n, nl) { |
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420 | var x, c = n.firstChild; |
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421 | while (c) { |
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422 | nl.push(c); |
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423 | if (x = c.firstChild) c = x; |
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424 | else for (x = c; !(c = x.nextSibling) && (x = x.parentNode) && (x != n);); |
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425 | } |
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426 | return nl; |
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427 | }; |
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428 | XPath.axes = { |
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429 | 'ancestor' : function (n) { |
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430 | var nl = []; |
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431 | while (n = n.parentNode) nl.unshift(n); |
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432 | return nl; |
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433 | }, |
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434 | 'ancestor-or-self' : function (n) { |
---|
435 | var nl = []; |
---|
436 | do { nl.unshift(n) } while (n = n.parentNode); |
---|
437 | return nl; |
---|
438 | }, |
---|
439 | 'attribute' : new Function ('n', |
---|
440 | 'var nl = [], a = n.attributes;if(a){attr:for(var x,i=a.length;--i>=0;){if(!(x=a[i]).specified){' + |
---|
441 | (XPath.ie?'switch(x.nodeName){case"selected":case"value":if(x.nodeValue)break;default:continue attr;}' : 'continue;') + |
---|
442 | '}nl.unshift(x);}}return nl;' |
---|
443 | ), |
---|
444 | 'child' : function (n) { |
---|
445 | return n.childNodes || []; |
---|
446 | }, |
---|
447 | 'descendant' : function (n) { |
---|
448 | return this.walk(n, []); |
---|
449 | }, |
---|
450 | 'descendant-or-self' : function (n) { |
---|
451 | return this.walk(n, [n]); |
---|
452 | }, |
---|
453 | 'following' : function (n) { |
---|
454 | var nl = [], x; |
---|
455 | while (n) { |
---|
456 | if (x = n.nextSibling) { |
---|
457 | nl.push(n = x); |
---|
458 | if (x = n.firstChild) nl.push(n = x); |
---|
459 | } |
---|
460 | else n = n.parentNode; |
---|
461 | } |
---|
462 | return nl; |
---|
463 | }, |
---|
464 | 'following-sibling' : function (n) { |
---|
465 | var nl = []; |
---|
466 | while (n = n.nextSibling) nl.push(n); |
---|
467 | return nl; |
---|
468 | }, |
---|
469 | 'parent' : function (n) { |
---|
470 | return n.parentNode ? [n.parentNode] : []; |
---|
471 | }, |
---|
472 | 'preceding' : function (n) { |
---|
473 | var nl = [], x, p = n.parentNode; |
---|
474 | while (n) { |
---|
475 | if (x = n.previousSibling) { |
---|
476 | for (n = x; x = n.lastChild; n = x); |
---|
477 | nl.unshift(n); |
---|
478 | } |
---|
479 | else if (n = n.parentNode) { |
---|
480 | if (n == p) p = p.parentNode; |
---|
481 | else nl.unshift(n); |
---|
482 | } |
---|
483 | } |
---|
484 | return nl; |
---|
485 | }, |
---|
486 | 'preceding-sibling' : function (n) { |
---|
487 | var nl = []; |
---|
488 | while (n = n.previousSibling) nl.unshift(n); |
---|
489 | return nl; |
---|
490 | }, |
---|
491 | 'self' : function (n) { |
---|
492 | return [n]; |
---|
493 | }, |
---|
494 | 'document-root' : function (n) { |
---|
495 | return [n.ownerDocument || n]; |
---|
496 | } |
---|
497 | }; |
---|
498 | XPath.axis = function (fn, nt/*, pr..., nl*/) { |
---|
499 | var r, x, al = arguments.length - 1, nl = arguments[al], ap = Array.prototype; |
---|
500 | for (var i = 0, j, l = nl.length; --l >= 0;) { |
---|
501 | x = fn.call(this, nl[i++]); |
---|
502 | if (nt && x.length) x = ap.filter.call(x, nt, this); |
---|
503 | for (j = 2; j < al && x.length; x = ap.filter.call(x, arguments[j++], this)); |
---|
504 | r = r ? this.union(r, x) : x; |
---|
505 | } |
---|
506 | return r || []; |
---|
507 | }; |
---|
508 | XPath.cache = {}; |
---|
509 | |
---|
510 | /** |
---|
511 | * Extends the native <code>Node</code> class with additional functionality. |
---|
512 | * <p>Not available in Internet Exporer which don’t have a <code>Node</code> class.</p> |
---|
513 | * <p>See <a href="http://www.w3.org/TR/2003/WD-DOM-Level-3-Core-20030226/core.html#ID-1950641247" target="_blank">http://www.w3.org/TR/2003/WD-DOM-Level-3-Core-20030226/core.html#ID-1950641247</a></code>.</p> |
---|
514 | * @class Node |
---|
515 | * @author Henrik Lindqvist <<a href="mailto:henrik.lindqvist@llamalab.com">henrik.lindqvist@llamalab.com</a>> |
---|
516 | */ |
---|
517 | /** |
---|
518 | * Compares a node with this node with regard to their position in the document and according to the document order. |
---|
519 | * <p>When comparing two attribute nodes; <code>32</code> is returned if they have the |
---|
520 | * same <code>ownerElement</code>, otherwise <code>0</code>. This is probably not standard, |
---|
521 | * but it’s what Firefox return, so we do the same.</p> |
---|
522 | * <pre> |
---|
523 | * DOCUMENT_POSITION_DISCONNECTED = 1; |
---|
524 | * DOCUMENT_POSITION_PRECEDING = 2; |
---|
525 | * DOCUMENT_POSITION_FOLLOWING = 4; |
---|
526 | * DOCUMENT_POSITION_CONTAINS = 8; |
---|
527 | * DOCUMENT_POSITION_IS_CONTAINED = 16; |
---|
528 | * DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC = 32; |
---|
529 | * </pre> |
---|
530 | * <p>See <a href="http://www.w3.org/TR/2003/WD-DOM-Level-3-Core-20030226/core.html#Node3-compareDocumentPosition" target="_blank">http://www.w3.org/TR/2003/WD-DOM-Level-3-Core-20030226/core.html#Node3-compareDocumentPosition</a></code>.</p> |
---|
531 | * @function {number} compareDocumentPosition |
---|
532 | * @param {Node} n - node to compare against. |
---|
533 | * @returns <code>0</code> for nodes are equals or a number with some of the above bits set. |
---|
534 | */ |
---|
535 | /** |
---|
536 | * Check if this node contains another node. |
---|
537 | * @function {boolean} contains |
---|
538 | * @param {Node} n - node to compare against. |
---|
539 | * @returns <code>true</code> if <code>this</code> node cotains node <code>n</code>. |
---|
540 | */ |
---|
541 | function compareDocumentPosition (n) { |
---|
542 | if (this == n) return 0; // Same |
---|
543 | if (this.nodeType == 2 && n.nodeType == 2) |
---|
544 | return (this.ownerElement && this.ownerElement == n.ownerElement) ? 32 : 0; // IMPLEMENT_SPECIFIC |
---|
545 | var l = this.ownerElement || this, r = n.ownerElement || n; |
---|
546 | if (l.sourceIndex >= 0 && r.sourceIndex >= 0 && l.contains && r.contains) { |
---|
547 | return ( |
---|
548 | ((l.contains(r) && 16) || (r.contains(l) && 8)) |
---|
549 | | ((l.sourceIndex < r.sourceIndex && 4) || (r.sourceIndex < l.sourceIndex && 2)) |
---|
550 | ) || 1; |
---|
551 | } |
---|
552 | var la = l, ra = r, ld = 0, rd = 0; |
---|
553 | while (la = la.parentNode) ld++; |
---|
554 | while (ra = ra.parentNode) rd++; |
---|
555 | if (ld > rd) { |
---|
556 | while (ld-- != rd) l = l.parentNode; |
---|
557 | if (l == r) return 2|8; // Preceding|Contains |
---|
558 | } |
---|
559 | else if (rd > ld) { |
---|
560 | while (rd-- != ld) r = r.parentNode; |
---|
561 | if (r == l) return 4|16; // Following|Contained By |
---|
562 | } |
---|
563 | while ((la = l.parentNode) != (ra = r.parentNode)) |
---|
564 | if (!(l = la) || !(r = ra)) return 1; // Disconnected |
---|
565 | while (l = l.nextSibling) |
---|
566 | if (l == r) return 4; // Following |
---|
567 | return 2; // Preceding |
---|
568 | }; |
---|
569 | if (w.Node) { |
---|
570 | var np = w.Node.prototype; |
---|
571 | if (f || !np.compareDocumentPosition) |
---|
572 | np.compareDocumentPosition = compareDocumentPosition; |
---|
573 | if (f || !np.contains) { |
---|
574 | np.contains = function (n) { |
---|
575 | return Boolean(this.compareDocumentPosition(n) & 16); |
---|
576 | }; |
---|
577 | } |
---|
578 | } |
---|
579 | else |
---|
580 | XPath.compareDocumentPosition = compareDocumentPosition; |
---|
581 | /** |
---|
582 | * Exception throw when parser or expression fails. |
---|
583 | * <p>See <code><a href="http://www.w3.org/TR/DOM-Level-3-XPath/xpath.html#XPathException" target="_blank">http://www.w3.org/TR/DOM-Level-3-XPath/xpath.html#XPathException</a></code>.</p> |
---|
584 | * @class XPathException |
---|
585 | * @author Henrik Lindqvist <<a href="mailto:henrik.lindqvist@llamalab.com">henrik.lindqvist@llamalab.com</a>> |
---|
586 | */ |
---|
587 | /** |
---|
588 | * Namespace error. |
---|
589 | * @property {static read number} NAMESPACE_ERR |
---|
590 | */ |
---|
591 | /** |
---|
592 | * Expression syntax error. |
---|
593 | * @property {static read number} INVALID_EXPRESSION_ERR |
---|
594 | */ |
---|
595 | /** |
---|
596 | * Result type error. |
---|
597 | * @property {static read number} TYPE_ERR |
---|
598 | */ |
---|
599 | /** |
---|
600 | * XPathException constructor. |
---|
601 | * @constructor XPathException |
---|
602 | * @param {number} c - error code. |
---|
603 | * @param {string} m - error message. |
---|
604 | * @see NAMESPACE_ERR |
---|
605 | * @see INVALID_EXPRESSION_ERR |
---|
606 | * @see TYPE_ERR |
---|
607 | */ |
---|
608 | /** |
---|
609 | * Exception name. |
---|
610 | * @property {read string} name |
---|
611 | */ |
---|
612 | /** |
---|
613 | * Exception code. |
---|
614 | * @property {read number} code |
---|
615 | * @see NAMESPACE_ERR |
---|
616 | * @see INVALID_EXPRESSION_ERR |
---|
617 | * @see TYPE_ERR |
---|
618 | */ |
---|
619 | /** |
---|
620 | * Exception message. |
---|
621 | * @property {read string} message |
---|
622 | */ |
---|
623 | if (f || !w.XPathException) { |
---|
624 | function XPathException (c, m) { |
---|
625 | this.name = 'XPathException'; |
---|
626 | this.code = c; |
---|
627 | this.message = m; |
---|
628 | } |
---|
629 | var e = XPathException, p = new Error; |
---|
630 | p.toString = function () { |
---|
631 | return this.name+':'+this.message; |
---|
632 | }; |
---|
633 | e.prototype = p; |
---|
634 | e.NAMESPACE_ERR = 14; |
---|
635 | e.INVALID_EXPRESSION_ERR = 51; |
---|
636 | e.TYPE_ERR = 52; |
---|
637 | w.XPathException = e; |
---|
638 | } |
---|
639 | /** |
---|
640 | * Namespace resolver. |
---|
641 | * <p>See <code><a href="http://www.w3.org/TR/DOM-Level-3-XPath/xpath.html#XPathNSResolver" target="_blank">http://www.w3.org/TR/DOM-Level-3-XPath/xpath.html#XPathNSResolver</a></code>.</p> |
---|
642 | * @class XPathNSResolver |
---|
643 | * @see XPathEvaluator.createNSResolver |
---|
644 | * @author Henrik Lindqvist <<a href="mailto:henrik.lindqvist@llamalab.com">henrik.lindqvist@llamalab.com</a>> |
---|
645 | */ |
---|
646 | /** |
---|
647 | * Look up a namespace URI by it’s prefix use in document. |
---|
648 | * @function {string} lookupNamespaceURI |
---|
649 | * @param {string} p - <code>xmlns:</code> prefix, empty string for <code>targetNamespace</code>. |
---|
650 | * @returns associated namespace URI, or <code>undefined</code> if none is found. |
---|
651 | */ |
---|
652 | if (f || !w.XPathNSResolver) { |
---|
653 | function XPathNSResolver (n) { |
---|
654 | this.ns = {}; |
---|
655 | for (var m, a, i = n.attributes.length; --i >= 0;) |
---|
656 | if (m = /xmlns:(.+)/.exec((a = n.attributes[i]).nodeName)) |
---|
657 | this.ns[m[1]] = a.nodeValue; |
---|
658 | this.ns[''] = n.getAttribute('targetNamespace'); |
---|
659 | } |
---|
660 | XPathNSResolver.prototype = { |
---|
661 | lookupNamespaceURI : function (p) { |
---|
662 | return this.ns[p || '']; |
---|
663 | } |
---|
664 | }; |
---|
665 | w.XPathNSResolver = XPathNSResolver; |
---|
666 | } |
---|
667 | /** |
---|
668 | * A pre-parsed XPath expression. |
---|
669 | * <p>See <code><a href="http://www.w3.org/TR/DOM-Level-3-XPath/xpath.html#XPathExpression" target="_blank">http://www.w3.org/TR/DOM-Level-3-XPath/xpath.html#XPathExpression</a></code>.</p> |
---|
670 | * @class XPathExpression |
---|
671 | * @see XPathEvaluator.createExpression |
---|
672 | * @author Henrik Lindqvist <<a href="mailto:henrik.lindqvist@llamalab.com">henrik.lindqvist@llamalab.com</a>> |
---|
673 | */ |
---|
674 | /** |
---|
675 | * Evaluate this pre-parsed expression. |
---|
676 | * @function {XPathResult} evaluate |
---|
677 | * @param {Node} n - context node. |
---|
678 | * @param {number} rt - return type, see <code>{@link XPathResult}</code>. |
---|
679 | * @param {XPathResult} r - <code>{@link XPathResult}</code> that maybe reuse, or <code>null</code>. |
---|
680 | * @returns a <code>{@link XPathResult}</code>. |
---|
681 | */ |
---|
682 | if (f || !w.XPathExpression) { |
---|
683 | function XPathExpression (e, nsr) { |
---|
684 | this.fn = XPath.cache[e] || (XPath.cache[e] = new XPath(e)); |
---|
685 | this.nsr = nsr; |
---|
686 | } |
---|
687 | XPathExpression.prototype = { |
---|
688 | evaluate : function (n, rt) { |
---|
689 | return new XPathResult(this.fn(n, this.nsr), rt); |
---|
690 | } |
---|
691 | }; |
---|
692 | w.XPathExpression = XPathExpression; |
---|
693 | } |
---|
694 | /** |
---|
695 | * Container for XPath results. |
---|
696 | * <p>See <code><a href="http://www.w3.org/TR/DOM-Level-3-XPath/xpath.html#XPathResult" target="_blank">http://www.w3.org/TR/DOM-Level-3-XPath/xpath.html#XPathResult</a></code>.</p> |
---|
697 | * @class XPathResult |
---|
698 | * @see XPathEvaluator.evaluate |
---|
699 | * @see XPathExpression.evaluate |
---|
700 | * @author Henrik Lindqvist <<a href="mailto:henrik.lindqvist@llamalab.com">henrik.lindqvist@llamalab.com</a>> |
---|
701 | */ |
---|
702 | /** |
---|
703 | * Result will be accessed unconverted as the expression returned it. |
---|
704 | * @property {static read number} ANY_TYPE |
---|
705 | */ |
---|
706 | /** |
---|
707 | * Result will be accessed as a number. |
---|
708 | * @property {static read number} NUMBER_TYPE |
---|
709 | * @see numberValue |
---|
710 | */ |
---|
711 | /** |
---|
712 | * Result will be accessed as a string. |
---|
713 | * @property {static read number} STRING_TYPE |
---|
714 | * @see stringValue |
---|
715 | */ |
---|
716 | /** |
---|
717 | * Result will be accessed as boolean. |
---|
718 | * @property {static read number} BOOLEAN_TYPE |
---|
719 | * @see booleanValue |
---|
720 | */ |
---|
721 | /** |
---|
722 | * Result will be accessed iteratively, node order insignificant. |
---|
723 | * <p>This is equal to <code>{@link ORDERED_NODE_ITERATOR_TYPE}</code> |
---|
724 | * since the result is always document-ordered.</p> |
---|
725 | * @property {static read number} UNORDERED_NODE_ITERATOR_TYPE |
---|
726 | * @see iterateNext |
---|
727 | */ |
---|
728 | /** |
---|
729 | * Result will be accessed iteratively which must be document-ordered. |
---|
730 | * @property {static read number} ORDERED_NODE_ITERATOR_TYPE |
---|
731 | * @see iterateNext |
---|
732 | */ |
---|
733 | /** |
---|
734 | * Result will be accessed as a snapshot list of nodes, node order insignificant. |
---|
735 | * <p>This is equal to <code>{@link ORDERED_NODE_SNAPSHOT_TYPE}</code> |
---|
736 | * since the result is always document-ordered.</p> |
---|
737 | * @property {static read number} UNORDERED_NODE_SNAPSHOT_TYPE |
---|
738 | * @see snapshotLength |
---|
739 | * @see snapshotItem |
---|
740 | */ |
---|
741 | /** |
---|
742 | * Result will be accessed as a snapshot list of nodes which must be document-ordered. |
---|
743 | * @property {static read number} ORDERED_NODE_SNAPSHOT_TYPE |
---|
744 | * @see snapshotLength |
---|
745 | * @see snapshotItem |
---|
746 | */ |
---|
747 | /** |
---|
748 | * Result will be accessed as a single node value, any of the resulting nodes. |
---|
749 | * <p>This is equal to <code>{@link FIRST_ORDERED_NODE_TYPE}</code> |
---|
750 | * since the result is always document-ordered.</p> |
---|
751 | * @property {static read number} ANY_UNORDERED_NODE_TYPE |
---|
752 | * @see singleNodeValue |
---|
753 | */ |
---|
754 | /** |
---|
755 | * Result will be accessed as a single node value, the first resulting node in document-ordered. |
---|
756 | * @property {static read number} FIRST_ORDERED_NODE_TYPE |
---|
757 | * @see singleNodeValue |
---|
758 | */ |
---|
759 | /** |
---|
760 | * Convert result to number. |
---|
761 | * @property {static read number} NUMBER_TYPE |
---|
762 | */ |
---|
763 | /** |
---|
764 | * Convert result to number. |
---|
765 | * @property {static read number} NUMBER_TYPE |
---|
766 | */ |
---|
767 | /** |
---|
768 | * Convert result to number. |
---|
769 | * @property {static read number} NUMBER_TYPE |
---|
770 | */ |
---|
771 | /** |
---|
772 | * Convert result to number. |
---|
773 | * @property {static read number} NUMBER_TYPE |
---|
774 | */ |
---|
775 | /** |
---|
776 | * Convert result to number. |
---|
777 | * @property {static read number} NUMBER_TYPE |
---|
778 | */ |
---|
779 | /** |
---|
780 | * Resulting number. |
---|
781 | * @property {read number} numberValue |
---|
782 | * @see NUMBER_TYPE |
---|
783 | */ |
---|
784 | /** |
---|
785 | * Resulting string. |
---|
786 | * @property {read string} stringValue |
---|
787 | * @see STRING_TYPE |
---|
788 | */ |
---|
789 | /** |
---|
790 | * Resulting boolean. |
---|
791 | * @property {read boolean} booleanValue |
---|
792 | * @see BOOLEAN_TYPE |
---|
793 | */ |
---|
794 | /** |
---|
795 | * Signifies that the iterator has become invalid. |
---|
796 | * @property {read boolean} invalidIteratorState |
---|
797 | * @see UNORDERED_NODE_ITERATOR_TYPE |
---|
798 | * @see ORDERED_NODE_ITERATOR_TYPE |
---|
799 | */ |
---|
800 | /** |
---|
801 | * The number of nodes in the result snapshot. |
---|
802 | * @property {read number} snapshotLength |
---|
803 | * @see UNORDERED_NODE_SNAPSHOT_TYPE |
---|
804 | * @see ORDERED_NODE_SNAPSHOT_TYPE |
---|
805 | */ |
---|
806 | /** |
---|
807 | * The value of this single node result, maybe <code>undefined</code>. |
---|
808 | * @property {read object} singleNodeValue |
---|
809 | * @see ANY_UNORDERED_NODE_TYPE |
---|
810 | * @see FIRST_ORDERED_NODE_TYPE |
---|
811 | */ |
---|
812 | /** |
---|
813 | * Unconverted result as returned by our internal evaluator. |
---|
814 | * <p>This is a non-standard property which is set to the raw unconverted result from our |
---|
815 | * expression evaluator. It’s of the type <code>number</code>, <code>string</code>, |
---|
816 | * <code>boolean</code> or an <code>{@link Array}</code> with nodes depending on expression. |
---|
817 | * If you prefer to work with arrays instead of <code>{@link XPathResult.snapshotItem}</code> |
---|
818 | * You can check for this property and use it directly.</p> |
---|
819 | * <h3>Example</h3> |
---|
820 | * <pre> |
---|
821 | * function selectNodes (expr) { |
---|
822 | * // Cross-browser safe way of selecting nodes and return an Array |
---|
823 | * var r = document.evaluate('//LI', document, null, 7, null); |
---|
824 | * if (typeof r.value != 'undefined') return r.value; |
---|
825 | * var a = []; |
---|
826 | * for (var i = r.snapshotLength; --i >= 0; a[i] = r.snapshotItem(i)); |
---|
827 | * return a; |
---|
828 | * } |
---|
829 | * </pre> |
---|
830 | * @property {read object} value |
---|
831 | * @see ANY_TYPE |
---|
832 | */ |
---|
833 | /** |
---|
834 | * Iterates and returns the next node from the resuling nodes. |
---|
835 | * @function {object} iterateNext |
---|
836 | * @returns a <code>Node</code>, or <code>undefined</code> if there are no more nodes. |
---|
837 | */ |
---|
838 | /** |
---|
839 | * Returns the <code>index</code>th item in the snapshot collection. |
---|
840 | * @function {object} snapshotItem |
---|
841 | * @param {number} i - index of resuling node to return. |
---|
842 | * @returns the <code>Node</code>, at provided index or <code>undefined</code> if invalid. |
---|
843 | */ |
---|
844 | if (f || !w.XPathResult) { |
---|
845 | function XPathResult (r, rt) { |
---|
846 | if (rt == 0) { |
---|
847 | switch (typeof r) { |
---|
848 | default: rt++; |
---|
849 | case 'boolean': rt++; |
---|
850 | case 'string': rt++; |
---|
851 | case 'number': rt++; |
---|
852 | } |
---|
853 | } |
---|
854 | this.resultType = rt; |
---|
855 | switch (rt) { |
---|
856 | case 1: |
---|
857 | this.numberValue = XPath.number(r); |
---|
858 | return; |
---|
859 | case 2: |
---|
860 | this.stringValue = XPath.string(r); |
---|
861 | return; |
---|
862 | case 3: |
---|
863 | this.booleanValue = XPath.bool(r); |
---|
864 | return; |
---|
865 | case 4: |
---|
866 | case 5: |
---|
867 | if (r instanceof Array) { |
---|
868 | this.value = r; |
---|
869 | this.index = 0; |
---|
870 | this.invalidIteratorState = false; |
---|
871 | return; |
---|
872 | } |
---|
873 | break; |
---|
874 | case 6: |
---|
875 | case 7: |
---|
876 | if (r instanceof Array) { |
---|
877 | this.value = r; |
---|
878 | this.snapshotLength = r.length; |
---|
879 | return; |
---|
880 | } |
---|
881 | break; |
---|
882 | case 8: |
---|
883 | case 9: |
---|
884 | if (r instanceof Array) { |
---|
885 | this.singleNodeValue = r[0]; |
---|
886 | return; |
---|
887 | } |
---|
888 | } |
---|
889 | throw new XPathException(52); |
---|
890 | } |
---|
891 | var r = XPathResult; |
---|
892 | r.ANY_TYPE = 0; |
---|
893 | r.NUMBER_TYPE = 1; |
---|
894 | r.STRING_TYPE = 2; |
---|
895 | r.BOOLEAN_TYPE = 3; |
---|
896 | r.UNORDERED_NODE_ITERATOR_TYPE = 4; |
---|
897 | r.ORDERED_NODE_ITERATOR_TYPE = 5; |
---|
898 | r.UNORDERED_NODE_SNAPSHOT_TYPE = 6; |
---|
899 | r.ORDERED_NODE_SNAPSHOT_TYPE = 7; |
---|
900 | r.ANY_UNORDERED_NODE_TYPE = 8; |
---|
901 | r.FIRST_ORDERED_NODE_TYPE = 9; |
---|
902 | r.prototype = { |
---|
903 | iterateNext : function () { |
---|
904 | switch (this.resultType) { |
---|
905 | case 4: |
---|
906 | case 5: |
---|
907 | return this.value[this.index++]; |
---|
908 | } |
---|
909 | throw new XPathException(52); |
---|
910 | }, |
---|
911 | snapshotItem : function (i) { |
---|
912 | switch (this.resultType) { |
---|
913 | case 6: |
---|
914 | case 7: |
---|
915 | return this.value[i]; |
---|
916 | } |
---|
917 | throw new XPathException(52); |
---|
918 | } |
---|
919 | }; |
---|
920 | w.XPathResult = r; |
---|
921 | } |
---|
922 | /** |
---|
923 | * An interface with the XPath functionality. |
---|
924 | * <p><code>Document.prototype</code> and/or <code>document</code> will be |
---|
925 | * extended using <code>{@link install}</code> to implements it’s functions.</p> |
---|
926 | * <p>See <code><a href="http://www.w3.org/TR/DOM-Level-3-XPath/xpath.html#XPathEvaluator" target="_blank">http://www.w3.org/TR/DOM-Level-3-XPath/xpath.html#XPathEvaluator</a></code>.</p> |
---|
927 | * @interface XPathEvaluator |
---|
928 | * @author Henrik Lindqvist <<a href="mailto:henrik.lindqvist@llamalab.com">henrik.lindqvist@llamalab.com</a>> |
---|
929 | */ |
---|
930 | /** |
---|
931 | * Non-standard function that extends the provided object with <code>{@link XPathEvaluator}</code> functions. |
---|
932 | * @function {static} install |
---|
933 | * @param {object} o - object (i.e document node) to extend. |
---|
934 | * @param {optional boolean} f - force replace the build-in function even if they exists. |
---|
935 | */ |
---|
936 | /** |
---|
937 | * Creates a pre-parsed expression. |
---|
938 | * @function {XPathExpression} createExpression |
---|
939 | * @param {string} e - expression. |
---|
940 | * @param {XPathNSResolver} nsr - namespace resolver to use when evaluating, or <code>null</code>. |
---|
941 | * @returns a new <code>{@link XPathExpression}</code>. |
---|
942 | */ |
---|
943 | /** |
---|
944 | * Create a namespace resolver by scanning a node for <code>xmlns:</code> attributes. |
---|
945 | * @function {XPathNSResolver} createNSResolver |
---|
946 | * @param {Node} n - an <code>Node</code> with defined namespace attributes (i.e the documentElement). |
---|
947 | * @returns a new <code>{@link XPathNSResolver}</code>. |
---|
948 | */ |
---|
949 | /** |
---|
950 | * Evaluate an expression. |
---|
951 | * <p>Same as <code>new XPathExpression(e, nsr).evaluate(n, rt)</code>.</p> |
---|
952 | * @function {XPathResult} evaluate |
---|
953 | * @param {string} e - XPath expression string. |
---|
954 | * @param {Node} n - context node. |
---|
955 | * @param {XPathNSResolver} nsr - namespace resolver to use when evaluating, or <code>null</code>. |
---|
956 | * @param {number} rt - return type, see <code>{@link XPathResult}</code>. |
---|
957 | * @param {XPathResult} r - <code>{@link XPathResult}</code> that maybe reuse, or <code>null</code>. Ignored. |
---|
958 | * @returns a <code>{@link XPathResult}</code>. |
---|
959 | */ |
---|
960 | if (f || !w.XPathEvaluator) { |
---|
961 | function XPathEvaluator () {} |
---|
962 | var e = XPathEvaluator; |
---|
963 | e.prototype = { |
---|
964 | createExpression : function (e, nsr) { |
---|
965 | return new XPathExpression(e, nsr); |
---|
966 | }, |
---|
967 | createNSResolver : function (n) { |
---|
968 | return new XPathNSResolver(n); |
---|
969 | }, |
---|
970 | evaluate : function (e, n, nsr, rt) { |
---|
971 | return new XPathExpression(e, nsr).evaluate(n, rt); |
---|
972 | } |
---|
973 | }; |
---|
974 | e.install = function (o, f) { |
---|
975 | for (var k in XPathEvaluator.prototype) |
---|
976 | if (f || !o[k]) o[k] = XPathEvaluator.prototype[k]; |
---|
977 | }; |
---|
978 | w.XPathEvaluator = e; |
---|
979 | if (w.Document) |
---|
980 | e.install(w.Document.prototype, f); |
---|
981 | else |
---|
982 | e.install(document, f); |
---|
983 | w.XPath = XPath; |
---|
984 | } |
---|
985 | |
---|
986 | })(window, document, (/WebKit/.test(navigator.userAgent) || /Node\.js/.test(navigator.userAgent))); // force replace? |
---|