Mercurial > hg > OKFNAnnotator

annotate annotator_files/lib/range.js @ 3:6356e78ccf5c

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new version contains Annotator JS files to be used with FilesystemSite.
author casties
date Thu, 05 Apr 2012 19:37:27 +0200
parents
children 6979313586cf
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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3
6356e78ccf5c new version contains Annotator JS files to be used with FilesystemSite.
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1 var Range;
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2
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3 Range = {};
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4
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5 Range.sniff = function(r) {
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6 if (r.commonAncestorContainer != null) {
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7 return new Range.BrowserRange(r);
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8 } else if (typeof r.start === "string") {
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9 return new Range.SerializedRange(r);
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10 } else if (r.start && typeof r.start === "object") {
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11 return new Range.NormalizedRange(r);
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12 } else {
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13 console.error(_t("Could not sniff range type"));
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14 return false;
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15 }
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16 };
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17
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18 Range.BrowserRange = (function() {
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19
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20 function BrowserRange(obj) {
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21 this.commonAncestorContainer = obj.commonAncestorContainer;
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22 this.startContainer = obj.startContainer;
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23 this.startOffset = obj.startOffset;
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24 this.endContainer = obj.endContainer;
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25 this.endOffset = obj.endOffset;
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26 }
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27
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28 BrowserRange.prototype.normalize = function(root) {
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29 var it, node, nr, offset, p, r, _i, _len, _ref;
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30 if (this.tainted) {
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31 console.error(_t("You may only call normalize() once on a BrowserRange!"));
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32 return false;
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33 } else {
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34 this.tainted = true;
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35 }
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36 r = {};
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37 nr = {};
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38 _ref = ['start', 'end'];
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39 for (_i = 0, _len = _ref.length; _i < _len; _i++) {
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40 p = _ref[_i];
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41 node = this[p + 'Container'];
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42 offset = this[p + 'Offset'];
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43 if (!((node != null) && (offset != null))) return false;
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44 if (node.nodeType === 1) {
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45 it = node.childNodes[offset];
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46 node = it || node.childNodes[offset - 1];
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47 if (node.nodeType === 1 && !node.firstChild) {
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48 it = null;
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49 node = node.previousSibling;
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50 }
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51 while (node.nodeType !== 3) {
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52 node = node.firstChild;
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53 }
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54 offset = it ? 0 : node.nodeValue.length;
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55 }
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56 r[p] = node;
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57 r[p + 'Offset'] = offset;
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58 }
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59 nr.start = r.startOffset > 0 ? r.start.splitText(r.startOffset) : r.start;
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60 if (r.start === r.end) {
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61 if ((r.endOffset - r.startOffset) < nr.start.nodeValue.length) {
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62 nr.start.splitText(r.endOffset - r.startOffset);
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63 }
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64 nr.end = nr.start;
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65 } else {
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66 if (r.endOffset < r.end.nodeValue.length) r.end.splitText(r.endOffset);
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67 nr.end = r.end;
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68 }
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69 nr.commonAncestor = this.commonAncestorContainer;
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70 while (nr.commonAncestor.nodeType !== 1) {
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71 nr.commonAncestor = nr.commonAncestor.parentNode;
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72 }
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73 return new Range.NormalizedRange(nr);
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74 };
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75
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76 BrowserRange.prototype.serialize = function(root, ignoreSelector) {
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77 return this.normalize(root).serialize(root, ignoreSelector);
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78 };
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79
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80 return BrowserRange;
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81
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82 })();
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83
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84 Range.NormalizedRange = (function() {
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85
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86 function NormalizedRange(obj) {
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87 this.commonAncestor = obj.commonAncestor;
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88 this.start = obj.start;
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89 this.end = obj.end;
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90 }
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91
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92 NormalizedRange.prototype.normalize = function(root) {
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93 return this;
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94 };
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95
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96 NormalizedRange.prototype.limit = function(bounds) {
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97 var nodes, parent, startParents, _i, _len, _ref;
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98 nodes = $.grep(this.textNodes(), function(node) {
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99 return node.parentNode === bounds || $.contains(bounds, node.parentNode);
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100 });
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101 if (!nodes.length) return null;
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102 this.start = nodes[0];
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103 this.end = nodes[nodes.length - 1];
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104 startParents = $(this.start).parents();
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105 _ref = $(this.end).parents();
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106 for (_i = 0, _len = _ref.length; _i < _len; _i++) {
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107 parent = _ref[_i];
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108 if (startParents.index(parent) !== -1) {
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109 this.commonAncestor = parent;
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110 break;
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111 }
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112 }
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113 return this;
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114 };
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115
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116 NormalizedRange.prototype.serialize = function(root, ignoreSelector) {
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117 var end, serialization, start;
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118 serialization = function(node, isEnd) {
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119 var n, nodes, offset, origParent, textNodes, xpath, _i, _len;
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120 if (ignoreSelector) {
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121 origParent = $(node).parents(":not(" + ignoreSelector + ")").eq(0);
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122 } else {
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123 origParent = $(node).parent();
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124 }
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125 xpath = origParent.xpath(root)[0];
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126 textNodes = origParent.textNodes();
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127 nodes = textNodes.slice(0, textNodes.index(node));
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128 offset = 0;
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129 for (_i = 0, _len = nodes.length; _i < _len; _i++) {
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130 n = nodes[_i];
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131 offset += n.nodeValue.length;
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132 }
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133 if (isEnd) {
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134 return [xpath, offset + node.nodeValue.length];
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135 } else {
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136 return [xpath, offset];
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137 }
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138 };
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139 start = serialization(this.start);
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140 end = serialization(this.end, true);
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141 return new Range.SerializedRange({
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142 start: start[0],
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143 end: end[0],
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144 startOffset: start[1],
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145 endOffset: end[1]
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146 });
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147 };
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148
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149 NormalizedRange.prototype.text = function() {
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150 var node;
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151 return ((function() {
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152 var _i, _len, _ref, _results;
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153 _ref = this.textNodes();
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154 _results = [];
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155 for (_i = 0, _len = _ref.length; _i < _len; _i++) {
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156 node = _ref[_i];
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157 _results.push(node.nodeValue);
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158 }
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159 return _results;
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160 }).call(this)).join('');
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161 };
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162
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163 NormalizedRange.prototype.textNodes = function() {
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164 var end, start, textNodes, _ref;
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165 textNodes = $(this.commonAncestor).textNodes();
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166 _ref = [textNodes.index(this.start), textNodes.index(this.end)], start = _ref[0], end = _ref[1];
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167 return $.makeArray(textNodes.slice(start, end + 1 || 9e9));
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168 };
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169
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170 NormalizedRange.prototype.toRange = function() {
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171 var range;
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172 range = document.createRange();
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173 range.setStartBefore(this.start);
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174 range.setEndAfter(this.end);
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175 return range;
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176 };
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177
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178 return NormalizedRange;
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179
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180 })();
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181
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182 Range.SerializedRange = (function() {
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183
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184 function SerializedRange(obj) {
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185 this.start = obj.start;
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186 this.startOffset = obj.startOffset;
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187 this.end = obj.end;
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188 this.endOffset = obj.endOffset;
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189 }
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190
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191 SerializedRange.prototype._nodeFromXPath = function(xpath) {
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192 var customResolver, evaluateXPath, namespace, node, segment;
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193 evaluateXPath = function(xp, nsResolver) {
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194 if (nsResolver == null) nsResolver = null;
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195 return document.evaluate(xp, document, nsResolver, XPathResult.FIRST_ORDERED_NODE_TYPE, null).singleNodeValue;
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196 };
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197 if (!$.isXMLDoc(document.documentElement)) {
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198 return evaluateXPath(xpath);
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199 } else {
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200 customResolver = document.createNSResolver(document.ownerDocument === null ? document.documentElement : document.ownerDocument.documentElement);
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201 node = evaluateXPath(xpath, customResolver);
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202 if (!node) {
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203 xpath = ((function() {
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204 var _i, _len, _ref, _results;
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205 _ref = xpath.split('/');
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206 _results = [];
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207 for (_i = 0, _len = _ref.length; _i < _len; _i++) {
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208 segment = _ref[_i];
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209 if (segment && segment.indexOf(':') === -1) {
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210 _results.push(segment.replace(/^([a-z]+)/, 'xhtml:$1'));
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211 } else {
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212 _results.push(segment);
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213 }
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214 }
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215 return _results;
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216 })()).join('/');
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217 namespace = document.lookupNamespaceURI(null);
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218 customResolver = function(ns) {
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219 if (ns === 'xhtml') {
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220 return namespace;
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221 } else {
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222 return document.documentElement.getAttribute('xmlns:' + ns);
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223 }
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224 };
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225 node = evaluateXPath(xpath, customResolver);
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226 }
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227 return node;
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228 }
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229 };
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230
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231 SerializedRange.prototype.normalize = function(root) {
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232 var cacXPath, common, endAncestry, i, length, p, parentXPath, range, startAncestry, tn, _i, _j, _len, _len2, _ref, _ref2, _ref3;
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233 parentXPath = $(root).xpath()[0];
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234 startAncestry = this.start.split("/");
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235 endAncestry = this.end.split("/");
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236 common = [];
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237 range = {};
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238 for (i = 0, _ref = startAncestry.length; 0 <= _ref ? i < _ref : i > _ref; 0 <= _ref ? i++ : i--) {
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239 if (startAncestry[i] === endAncestry[i]) {
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240 common.push(startAncestry[i]);
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241 } else {
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242 break;
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243 }
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244 }
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245 cacXPath = parentXPath + common.join("/");
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246 range.commonAncestorContainer = this._nodeFromXPath(cacXPath);
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247 if (!range.commonAncestorContainer) {
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248 console.error(_t("Error deserializing range: can't find XPath '") + cacXPath + _t("'. Is this the right document?"));
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249 return null;
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250 }
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251 _ref2 = ['start', 'end'];
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252 for (_i = 0, _len = _ref2.length; _i < _len; _i++) {
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253 p = _ref2[_i];
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254 length = 0;
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255 _ref3 = $(this._nodeFromXPath(parentXPath + this[p])).textNodes();
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256 for (_j = 0, _len2 = _ref3.length; _j < _len2; _j++) {
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257 tn = _ref3[_j];
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258 if (length + tn.nodeValue.length >= this[p + 'Offset']) {
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259 range[p + 'Container'] = tn;
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260 range[p + 'Offset'] = this[p + 'Offset'] - length;
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261 break;
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262 } else {
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263 length += tn.nodeValue.length;
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264 }
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265 }
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266 }
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267 return new Range.BrowserRange(range).normalize(root);
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268 };
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269
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270 SerializedRange.prototype.serialize = function(root, ignoreSelector) {
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271 return this.normalize(root).serialize(root, ignoreSelector);
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272 };
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273
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274 SerializedRange.prototype.toObject = function() {
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275 return {
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276 start: this.start,
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277 startOffset: this.startOffset,
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278 end: this.end,
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279 endOffset: this.endOffset
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280 };
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281 };
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282
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283 return SerializedRange;
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284
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285 })();