1 | /*
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2 | * FCKeditor - The text editor for Internet - http://www.fckeditor.net
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3 | * Copyright (C) 2003-2009 Frederico Caldeira Knabben
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4 | *
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5 | * == BEGIN LICENSE ==
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6 | *
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7 | * Licensed under the terms of any of the following licenses at your
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8 | * choice:
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9 | *
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10 | * - GNU General Public License Version 2 or later (the "GPL")
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11 | * http://www.gnu.org/licenses/gpl.html
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12 | *
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13 | * - GNU Lesser General Public License Version 2.1 or later (the "LGPL")
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14 | * http://www.gnu.org/licenses/lgpl.html
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15 | *
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16 | * - Mozilla Public License Version 1.1 or later (the "MPL")
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17 | * http://www.mozilla.org/MPL/MPL-1.1.html
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18 | *
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19 | * == END LICENSE ==
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20 | *
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21 | * This class partially implements the W3C DOM Range for browser that don't
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22 | * support the standards (like IE):
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23 | * http://www.w3.org/TR/DOM-Level-2-Traversal-Range/ranges.html
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24 | */
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25 |
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26 | var FCKW3CRange = function( parentDocument )
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27 | {
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28 | this._Document = parentDocument ;
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29 |
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30 | this.startContainer = null ;
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31 | this.startOffset = null ;
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32 | this.endContainer = null ;
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33 | this.endOffset = null ;
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34 | this.collapsed = true ;
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35 | }
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36 |
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37 | FCKW3CRange.CreateRange = function( parentDocument )
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38 | {
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39 | // We could opt to use the Range implementation of the browsers. The problem
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40 | // is that every browser have different bugs on their implementations,
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41 | // mostly related to different interpretations of the W3C specifications.
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42 | // So, for now, let's use our implementation and pray for browsers fixings
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43 | // soon. Otherwise will go crazy on trying to find out workarounds.
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44 | /*
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45 | // Get the browser implementation of the range, if available.
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46 | if ( parentDocument.createRange )
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47 | {
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48 | var range = parentDocument.createRange() ;
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49 | if ( typeof( range.startContainer ) != 'undefined' )
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50 | return range ;
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51 | }
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52 | */
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53 | return new FCKW3CRange( parentDocument ) ;
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54 | }
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55 |
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56 | FCKW3CRange.CreateFromRange = function( parentDocument, sourceRange )
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57 | {
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58 | var range = FCKW3CRange.CreateRange( parentDocument ) ;
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59 | range.setStart( sourceRange.startContainer, sourceRange.startOffset ) ;
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60 | range.setEnd( sourceRange.endContainer, sourceRange.endOffset ) ;
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61 | return range ;
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62 | }
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63 |
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64 | FCKW3CRange.prototype =
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65 | {
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66 |
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67 | _UpdateCollapsed : function()
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68 | {
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69 | this.collapsed = ( this.startContainer == this.endContainer && this.startOffset == this.endOffset ) ;
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70 | },
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71 |
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72 | // W3C requires a check for the new position. If it is after the end
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73 | // boundary, the range should be collapsed to the new start. It seams we
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74 | // will not need this check for our use of this class so we can ignore it for now.
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75 | setStart : function( refNode, offset )
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76 | {
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77 | this.startContainer = refNode ;
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78 | this.startOffset = offset ;
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79 |
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80 | if ( !this.endContainer )
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81 | {
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82 | this.endContainer = refNode ;
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83 | this.endOffset = offset ;
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84 | }
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85 |
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86 | this._UpdateCollapsed() ;
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87 | },
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88 |
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89 | // W3C requires a check for the new position. If it is before the start
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90 | // boundary, the range should be collapsed to the new end. It seams we
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91 | // will not need this check for our use of this class so we can ignore it for now.
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92 | setEnd : function( refNode, offset )
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93 | {
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94 | this.endContainer = refNode ;
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95 | this.endOffset = offset ;
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96 |
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97 | if ( !this.startContainer )
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98 | {
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99 | this.startContainer = refNode ;
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100 | this.startOffset = offset ;
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101 | }
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102 |
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103 | this._UpdateCollapsed() ;
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104 | },
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105 |
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106 | setStartAfter : function( refNode )
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107 | {
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108 | this.setStart( refNode.parentNode, FCKDomTools.GetIndexOf( refNode ) + 1 ) ;
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109 | },
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110 |
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111 | setStartBefore : function( refNode )
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112 | {
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113 | this.setStart( refNode.parentNode, FCKDomTools.GetIndexOf( refNode ) ) ;
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114 | },
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115 |
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116 | setEndAfter : function( refNode )
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117 | {
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118 | this.setEnd( refNode.parentNode, FCKDomTools.GetIndexOf( refNode ) + 1 ) ;
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119 | },
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120 |
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121 | setEndBefore : function( refNode )
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122 | {
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123 | this.setEnd( refNode.parentNode, FCKDomTools.GetIndexOf( refNode ) ) ;
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124 | },
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125 |
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126 | collapse : function( toStart )
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127 | {
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128 | if ( toStart )
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129 | {
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130 | this.endContainer = this.startContainer ;
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131 | this.endOffset = this.startOffset ;
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132 | }
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133 | else
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134 | {
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135 | this.startContainer = this.endContainer ;
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136 | this.startOffset = this.endOffset ;
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137 | }
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138 |
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139 | this.collapsed = true ;
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140 | },
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141 |
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142 | selectNodeContents : function( refNode )
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143 | {
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144 | this.setStart( refNode, 0 ) ;
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145 | this.setEnd( refNode, refNode.nodeType == 3 ? refNode.data.length : refNode.childNodes.length ) ;
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146 | },
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147 |
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148 | insertNode : function( newNode )
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149 | {
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150 | var startContainer = this.startContainer ;
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151 | var startOffset = this.startOffset ;
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152 |
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153 | // If we are in a text node.
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154 | if ( startContainer.nodeType == 3 )
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155 | {
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156 | startContainer.splitText( startOffset ) ;
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157 |
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158 | // Check if it is necessary to update the end boundary.
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159 | if ( startContainer == this.endContainer )
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160 | this.setEnd( startContainer.nextSibling, this.endOffset - this.startOffset ) ;
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161 |
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162 | // Insert the new node it after the text node.
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163 | FCKDomTools.InsertAfterNode( startContainer, newNode ) ;
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164 |
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165 | return ;
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166 | }
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167 | else
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168 | {
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169 | // Simply insert the new node before the current start node.
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170 | startContainer.insertBefore( newNode, startContainer.childNodes[ startOffset ] || null ) ;
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171 |
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172 | // Check if it is necessary to update the end boundary.
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173 | if ( startContainer == this.endContainer )
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174 | {
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175 | this.endOffset++ ;
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176 | this.collapsed = false ;
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177 | }
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178 | }
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179 | },
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180 |
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181 | deleteContents : function()
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182 | {
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183 | if ( this.collapsed )
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184 | return ;
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185 |
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186 | this._ExecContentsAction( 0 ) ;
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187 | },
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188 |
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189 | extractContents : function()
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190 | {
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191 | var docFrag = new FCKDocumentFragment( this._Document ) ;
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192 |
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193 | if ( !this.collapsed )
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194 | this._ExecContentsAction( 1, docFrag ) ;
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195 |
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196 | return docFrag ;
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197 | },
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198 |
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199 | // The selection may be lost when cloning (due to the splitText() call).
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200 | cloneContents : function()
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201 | {
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202 | var docFrag = new FCKDocumentFragment( this._Document ) ;
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203 |
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204 | if ( !this.collapsed )
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205 | this._ExecContentsAction( 2, docFrag ) ;
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206 |
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207 | return docFrag ;
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208 | },
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209 |
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210 | _ExecContentsAction : function( action, docFrag )
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211 | {
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212 | var startNode = this.startContainer ;
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213 | var endNode = this.endContainer ;
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214 |
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215 | var startOffset = this.startOffset ;
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216 | var endOffset = this.endOffset ;
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217 |
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218 | var removeStartNode = false ;
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219 | var removeEndNode = false ;
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220 |
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221 | // Check the start and end nodes and make the necessary removals or changes.
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222 |
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223 | // Start from the end, otherwise DOM mutations (splitText) made in the
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224 | // start boundary may interfere on the results here.
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225 |
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226 | // For text containers, we must simply split the node and point to the
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227 | // second part. The removal will be handled by the rest of the code .
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228 | if ( endNode.nodeType == 3 )
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229 | endNode = endNode.splitText( endOffset ) ;
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230 | else
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231 | {
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232 | // If the end container has children and the offset is pointing
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233 | // to a child, then we should start from it.
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234 | if ( endNode.childNodes.length > 0 )
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235 | {
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236 | // If the offset points after the last node.
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237 | if ( endOffset > endNode.childNodes.length - 1 )
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238 | {
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239 | // Let's create a temporary node and mark it for removal.
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240 | endNode = FCKDomTools.InsertAfterNode( endNode.lastChild, this._Document.createTextNode('') ) ;
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241 | removeEndNode = true ;
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242 | }
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243 | else
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244 | endNode = endNode.childNodes[ endOffset ] ;
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245 | }
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246 | }
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247 |
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248 | // For text containers, we must simply split the node. The removal will
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249 | // be handled by the rest of the code .
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250 | if ( startNode.nodeType == 3 )
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251 | {
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252 | startNode.splitText( startOffset ) ;
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253 |
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254 | // In cases the end node is the same as the start node, the above
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255 | // splitting will also split the end, so me must move the end to
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256 | // the second part of the split.
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257 | if ( startNode == endNode )
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258 | endNode = startNode.nextSibling ;
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259 | }
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260 | else
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261 | {
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262 | // If the start container has children and the offset is pointing
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263 | // to a child, then we should start from its previous sibling.
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264 |
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265 | // If the offset points to the first node, we don't have a
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266 | // sibling, so let's use the first one, but mark it for removal.
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267 | if ( startOffset == 0 )
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268 | {
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269 | // Let's create a temporary node and mark it for removal.
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270 | startNode = startNode.insertBefore( this._Document.createTextNode(''), startNode.firstChild ) ;
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271 | removeStartNode = true ;
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272 | }
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273 | else if ( startOffset > startNode.childNodes.length - 1 )
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274 | {
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275 | // Let's create a temporary node and mark it for removal.
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276 | startNode = startNode.appendChild( this._Document.createTextNode('') ) ;
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277 | removeStartNode = true ;
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278 | }
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279 | else
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280 | startNode = startNode.childNodes[ startOffset ].previousSibling ;
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281 | }
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282 |
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283 | // Get the parent nodes tree for the start and end boundaries.
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284 | var startParents = FCKDomTools.GetParents( startNode ) ;
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285 | var endParents = FCKDomTools.GetParents( endNode ) ;
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286 |
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287 | // Compare them, to find the top most siblings.
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288 | var i, topStart, topEnd ;
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289 |
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290 | for ( i = 0 ; i < startParents.length ; i++ )
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291 | {
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292 | topStart = startParents[i] ;
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293 | topEnd = endParents[i] ;
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294 |
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295 | // The compared nodes will match until we find the top most
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296 | // siblings (different nodes that have the same parent).
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297 | // "i" will hold the index in the parents array for the top
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298 | // most element.
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299 | if ( topStart != topEnd )
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300 | break ;
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301 | }
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302 |
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303 | var clone, levelStartNode, levelClone, currentNode, currentSibling ;
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304 |
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305 | if ( docFrag )
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306 | clone = docFrag.RootNode ;
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307 |
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308 | // Remove all successive sibling nodes for every node in the
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309 | // startParents tree.
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310 | for ( var j = i ; j < startParents.length ; j++ )
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311 | {
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312 | levelStartNode = startParents[j] ;
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313 |
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314 | // For Extract and Clone, we must clone this level.
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315 | if ( clone && levelStartNode != startNode ) // action = 0 = Delete
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316 | levelClone = clone.appendChild( levelStartNode.cloneNode( levelStartNode == startNode ) ) ;
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317 |
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318 | currentNode = levelStartNode.nextSibling ;
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319 |
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320 | while( currentNode )
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321 | {
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322 | // Stop processing when the current node matches a node in the
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323 | // endParents tree or if it is the endNode.
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324 | if ( currentNode == endParents[j] || currentNode == endNode )
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325 | break ;
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326 |
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327 | // Cache the next sibling.
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328 | currentSibling = currentNode.nextSibling ;
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329 |
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330 | // If cloning, just clone it.
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331 | if ( action == 2 ) // 2 = Clone
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332 | clone.appendChild( currentNode.cloneNode( true ) ) ;
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333 | else
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334 | {
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335 | // Both Delete and Extract will remove the node.
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336 | currentNode.parentNode.removeChild( currentNode ) ;
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337 |
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338 | // When Extracting, move the removed node to the docFrag.
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339 | if ( action == 1 ) // 1 = Extract
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340 | clone.appendChild( currentNode ) ;
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341 | }
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342 |
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343 | currentNode = currentSibling ;
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344 | }
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345 |
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346 | if ( clone )
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347 | clone = levelClone ;
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348 | }
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349 |
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350 | if ( docFrag )
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351 | clone = docFrag.RootNode ;
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352 |
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353 | // Remove all previous sibling nodes for every node in the
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354 | // endParents tree.
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355 | for ( var k = i ; k < endParents.length ; k++ )
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356 | {
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357 | levelStartNode = endParents[k] ;
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358 |
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359 | // For Extract and Clone, we must clone this level.
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360 | if ( action > 0 && levelStartNode != endNode ) // action = 0 = Delete
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361 | levelClone = clone.appendChild( levelStartNode.cloneNode( levelStartNode == endNode ) ) ;
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362 |
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363 | // The processing of siblings may have already been done by the parent.
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364 | if ( !startParents[k] || levelStartNode.parentNode != startParents[k].parentNode )
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365 | {
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366 | currentNode = levelStartNode.previousSibling ;
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367 |
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368 | while( currentNode )
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369 | {
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370 | // Stop processing when the current node matches a node in the
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371 | // startParents tree or if it is the startNode.
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372 | if ( currentNode == startParents[k] || currentNode == startNode )
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373 | break ;
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374 |
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375 | // Cache the next sibling.
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376 | currentSibling = currentNode.previousSibling ;
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377 |
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378 | // If cloning, just clone it.
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379 | if ( action == 2 ) // 2 = Clone
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380 | clone.insertBefore( currentNode.cloneNode( true ), clone.firstChild ) ;
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381 | else
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382 | {
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383 | // Both Delete and Extract will remove the node.
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384 | currentNode.parentNode.removeChild( currentNode ) ;
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385 |
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386 | // When Extracting, mode the removed node to the docFrag.
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387 | if ( action == 1 ) // 1 = Extract
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388 | clone.insertBefore( currentNode, clone.firstChild ) ;
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389 | }
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390 |
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391 | currentNode = currentSibling ;
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392 | }
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393 | }
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394 |
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395 | if ( clone )
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396 | clone = levelClone ;
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397 | }
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398 |
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399 | if ( action == 2 ) // 2 = Clone.
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400 | {
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401 | // No changes in the DOM should be done, so fix the split text (if any).
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402 |
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403 | var startTextNode = this.startContainer ;
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404 | if ( startTextNode.nodeType == 3 )
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405 | {
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406 | startTextNode.data += startTextNode.nextSibling.data ;
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407 | startTextNode.parentNode.removeChild( startTextNode.nextSibling ) ;
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408 | }
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409 |
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410 | var endTextNode = this.endContainer ;
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411 | if ( endTextNode.nodeType == 3 && endTextNode.nextSibling )
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412 | {
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413 | endTextNode.data += endTextNode.nextSibling.data ;
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414 | endTextNode.parentNode.removeChild( endTextNode.nextSibling ) ;
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415 | }
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416 | }
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417 | else
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418 | {
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419 | // Collapse the range.
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420 |
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421 | // If a node has been partially selected, collapse the range between
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422 | // topStart and topEnd. Otherwise, simply collapse it to the start. (W3C specs).
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423 | if ( topStart && topEnd && ( startNode.parentNode != topStart.parentNode || endNode.parentNode != topEnd.parentNode ) )
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424 | {
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425 | var endIndex = FCKDomTools.GetIndexOf( topEnd ) ;
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426 |
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427 | // If the start node is to be removed, we must correct the
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428 | // index to reflect the removal.
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429 | if ( removeStartNode && topEnd.parentNode == startNode.parentNode )
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430 | endIndex-- ;
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431 |
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432 | this.setStart( topEnd.parentNode, endIndex ) ;
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433 | }
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434 |
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435 | // Collapse it to the start.
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436 | this.collapse( true ) ;
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437 | }
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438 |
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439 | // Cleanup any marked node.
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440 | if( removeStartNode )
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441 | startNode.parentNode.removeChild( startNode ) ;
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442 |
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443 | if( removeEndNode && endNode.parentNode )
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444 | endNode.parentNode.removeChild( endNode ) ;
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445 | },
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446 |
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447 | cloneRange : function()
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448 | {
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449 | return FCKW3CRange.CreateFromRange( this._Document, this ) ;
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450 | }
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451 | } ;
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