1 | /*
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2 | Copyright (c) 2003-2011, CKSource - Frederico Knabben. All rights reserved.
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3 | For licensing, see LICENSE.html or http://ckeditor.com/license
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4 | */
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5 |
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6 | /**
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7 | * @file DOM iterator, which iterates over list items, lines and paragraphs.
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8 | */
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9 |
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10 | CKEDITOR.plugins.add( 'domiterator' );
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11 |
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12 | (function()
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13 | {
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14 | /**
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15 | * @name CKEDITOR.dom.iterator
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16 | */
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17 | function iterator( range )
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18 | {
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19 | if ( arguments.length < 1 )
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20 | return;
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21 |
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22 | this.range = range;
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23 | this.forceBrBreak = 0;
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24 |
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25 | // Whether include <br>s into the enlarged range.(#3730).
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26 | this.enlargeBr = 1;
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27 | this.enforceRealBlocks = 0;
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28 |
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29 | this._ || ( this._ = {} );
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30 | }
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31 |
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32 | var beginWhitespaceRegex = /^[\r\n\t ]+$/,
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33 | // Ignore bookmark nodes.(#3783)
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34 | bookmarkGuard = CKEDITOR.dom.walker.bookmark( false, true ),
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35 | whitespacesGuard = CKEDITOR.dom.walker.whitespaces( true ),
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36 | skipGuard = function( node ) { return bookmarkGuard( node ) && whitespacesGuard( node ); };
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37 |
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38 | // Get a reference for the next element, bookmark nodes are skipped.
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39 | function getNextSourceNode( node, startFromSibling, lastNode )
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40 | {
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41 | var next = node.getNextSourceNode( startFromSibling, null, lastNode );
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42 | while ( !bookmarkGuard( next ) )
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43 | next = next.getNextSourceNode( startFromSibling, null, lastNode );
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44 | return next;
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45 | }
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46 |
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47 | iterator.prototype = {
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48 | getNextParagraph : function( blockTag )
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49 | {
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50 | // The block element to be returned.
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51 | var block;
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52 |
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53 | // The range object used to identify the paragraph contents.
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54 | var range;
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55 |
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56 | // Indicats that the current element in the loop is the last one.
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57 | var isLast;
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58 |
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59 | // Indicate at least one of the range boundaries is inside a preformat block.
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60 | var touchPre;
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61 |
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62 | // Instructs to cleanup remaining BRs.
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63 | var removePreviousBr, removeLastBr;
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64 |
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65 | // This is the first iteration. Let's initialize it.
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66 | if ( !this._.lastNode )
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67 | {
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68 | range = this.range.clone();
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69 |
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70 | // Shrink the range to exclude harmful "noises" (#4087, #4450, #5435).
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71 | range.shrink( CKEDITOR.NODE_ELEMENT, true );
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72 |
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73 | touchPre = range.endContainer.hasAscendant( 'pre', true )
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74 | || range.startContainer.hasAscendant( 'pre', true );
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75 |
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76 | range.enlarge( this.forceBrBreak && !touchPre || !this.enlargeBr ?
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77 | CKEDITOR.ENLARGE_LIST_ITEM_CONTENTS : CKEDITOR.ENLARGE_BLOCK_CONTENTS );
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78 |
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79 | var walker = new CKEDITOR.dom.walker( range ),
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80 | ignoreBookmarkTextEvaluator = CKEDITOR.dom.walker.bookmark( true, true );
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81 | // Avoid anchor inside bookmark inner text.
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82 | walker.evaluator = ignoreBookmarkTextEvaluator;
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83 | this._.nextNode = walker.next();
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84 | // TODO: It's better to have walker.reset() used here.
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85 | walker = new CKEDITOR.dom.walker( range );
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86 | walker.evaluator = ignoreBookmarkTextEvaluator;
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87 | var lastNode = walker.previous();
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88 | this._.lastNode = lastNode.getNextSourceNode( true );
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89 |
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90 | // We may have an empty text node at the end of block due to [3770].
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91 | // If that node is the lastNode, it would cause our logic to leak to the
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92 | // next block.(#3887)
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93 | if ( this._.lastNode &&
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94 | this._.lastNode.type == CKEDITOR.NODE_TEXT &&
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95 | !CKEDITOR.tools.trim( this._.lastNode.getText() ) &&
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96 | this._.lastNode.getParent().isBlockBoundary() )
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97 | {
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98 | var testRange = new CKEDITOR.dom.range( range.document );
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99 | testRange.moveToPosition( this._.lastNode, CKEDITOR.POSITION_AFTER_END );
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100 | if ( testRange.checkEndOfBlock() )
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101 | {
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102 | var path = new CKEDITOR.dom.elementPath( testRange.endContainer );
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103 | var lastBlock = path.block || path.blockLimit;
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104 | this._.lastNode = lastBlock.getNextSourceNode( true );
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105 | }
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106 | }
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107 |
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108 | // Probably the document end is reached, we need a marker node.
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109 | if ( !this._.lastNode )
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110 | {
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111 | this._.lastNode = this._.docEndMarker = range.document.createText( '' );
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112 | this._.lastNode.insertAfter( lastNode );
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113 | }
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114 |
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115 | // Let's reuse this variable.
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116 | range = null;
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117 | }
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118 |
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119 | var currentNode = this._.nextNode;
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120 | lastNode = this._.lastNode;
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121 |
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122 | this._.nextNode = null;
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123 | while ( currentNode )
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124 | {
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125 | // closeRange indicates that a paragraph boundary has been found,
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126 | // so the range can be closed.
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127 | var closeRange = 0,
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128 | parentPre = currentNode.hasAscendant( 'pre' );
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129 |
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130 | // includeNode indicates that the current node is good to be part
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131 | // of the range. By default, any non-element node is ok for it.
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132 | var includeNode = ( currentNode.type != CKEDITOR.NODE_ELEMENT ),
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133 | continueFromSibling = 0;
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134 |
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135 | // If it is an element node, let's check if it can be part of the
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136 | // range.
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137 | if ( !includeNode )
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138 | {
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139 | var nodeName = currentNode.getName();
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140 |
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141 | if ( currentNode.isBlockBoundary( this.forceBrBreak &&
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142 | !parentPre && { br : 1 } ) )
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143 | {
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144 | // <br> boundaries must be part of the range. It will
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145 | // happen only if ForceBrBreak.
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146 | if ( nodeName == 'br' )
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147 | includeNode = 1;
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148 | else if ( !range && !currentNode.getChildCount() && nodeName != 'hr' )
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149 | {
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150 | // If we have found an empty block, and haven't started
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151 | // the range yet, it means we must return this block.
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152 | block = currentNode;
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153 | isLast = currentNode.equals( lastNode );
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154 | break;
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155 | }
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156 |
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157 | // The range must finish right before the boundary,
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158 | // including possibly skipped empty spaces. (#1603)
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159 | if ( range )
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160 | {
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161 | range.setEndAt( currentNode, CKEDITOR.POSITION_BEFORE_START );
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162 |
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163 | // The found boundary must be set as the next one at this
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164 | // point. (#1717)
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165 | if ( nodeName != 'br' )
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166 | this._.nextNode = currentNode;
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167 | }
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168 |
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169 | closeRange = 1;
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170 | }
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171 | else
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172 | {
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173 | // If we have child nodes, let's check them.
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174 | if ( currentNode.getFirst() )
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175 | {
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176 | // If we don't have a range yet, let's start it.
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177 | if ( !range )
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178 | {
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179 | range = new CKEDITOR.dom.range( this.range.document );
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180 | range.setStartAt( currentNode, CKEDITOR.POSITION_BEFORE_START );
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181 | }
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182 |
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183 | currentNode = currentNode.getFirst();
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184 | continue;
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185 | }
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186 | includeNode = 1;
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187 | }
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188 | }
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189 | else if ( currentNode.type == CKEDITOR.NODE_TEXT )
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190 | {
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191 | // Ignore normal whitespaces (i.e. not including or
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192 | // other unicode whitespaces) before/after a block node.
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193 | if ( beginWhitespaceRegex.test( currentNode.getText() ) )
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194 | includeNode = 0;
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195 | }
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196 |
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197 | // The current node is good to be part of the range and we are
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198 | // starting a new range, initialize it first.
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199 | if ( includeNode && !range )
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200 | {
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201 | range = new CKEDITOR.dom.range( this.range.document );
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202 | range.setStartAt( currentNode, CKEDITOR.POSITION_BEFORE_START );
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203 | }
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204 |
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205 | // The last node has been found.
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206 | isLast = ( ( !closeRange || includeNode ) && currentNode.equals( lastNode ) );
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207 |
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208 | // If we are in an element boundary, let's check if it is time
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209 | // to close the range, otherwise we include the parent within it.
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210 | if ( range && !closeRange )
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211 | {
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212 | while ( !currentNode.getNext( skipGuard ) && !isLast )
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213 | {
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214 | var parentNode = currentNode.getParent();
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215 |
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216 | if ( parentNode.isBlockBoundary( this.forceBrBreak
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217 | && !parentPre && { br : 1 } ) )
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218 | {
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219 | closeRange = 1;
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220 | includeNode = 0;
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221 | isLast = isLast || ( parentNode.equals( lastNode) );
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222 | // Make sure range includes bookmarks at the end of the block. (#7359)
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223 | range.setEndAt( parentNode, CKEDITOR.POSITION_BEFORE_END );
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224 | break;
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225 | }
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226 |
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227 | currentNode = parentNode;
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228 | includeNode = 1;
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229 | isLast = ( currentNode.equals( lastNode ) );
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230 | continueFromSibling = 1;
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231 | }
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232 | }
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233 |
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234 | // Now finally include the node.
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235 | if ( includeNode )
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236 | range.setEndAt( currentNode, CKEDITOR.POSITION_AFTER_END );
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237 |
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238 | currentNode = getNextSourceNode ( currentNode, continueFromSibling, lastNode );
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239 | isLast = !currentNode;
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240 |
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241 | // We have found a block boundary. Let's close the range and move out of the
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242 | // loop.
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243 | if ( isLast || ( closeRange && range ) )
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244 | break;
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245 | }
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246 |
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247 | // Now, based on the processed range, look for (or create) the block to be returned.
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248 | if ( !block )
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249 | {
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250 | // If no range has been found, this is the end.
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251 | if ( !range )
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252 | {
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253 | this._.docEndMarker && this._.docEndMarker.remove();
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254 | this._.nextNode = null;
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255 | return null;
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256 | }
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257 |
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258 | var startPath = new CKEDITOR.dom.elementPath( range.startContainer );
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259 | var startBlockLimit = startPath.blockLimit,
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260 | checkLimits = { div : 1, th : 1, td : 1 };
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261 | block = startPath.block;
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262 |
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263 | if ( !block
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264 | && !this.enforceRealBlocks
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265 | && checkLimits[ startBlockLimit.getName() ]
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266 | && range.checkStartOfBlock()
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267 | && range.checkEndOfBlock() )
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268 | block = startBlockLimit;
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269 | else if ( !block || ( this.enforceRealBlocks && block.getName() == 'li' ) )
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270 | {
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271 | // Create the fixed block.
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272 | block = this.range.document.createElement( blockTag || 'p' );
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273 |
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274 | // Move the contents of the temporary range to the fixed block.
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275 | range.extractContents().appendTo( block );
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276 | block.trim();
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277 |
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278 | // Insert the fixed block into the DOM.
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279 | range.insertNode( block );
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280 |
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281 | removePreviousBr = removeLastBr = true;
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282 | }
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283 | else if ( block.getName() != 'li' )
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284 | {
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285 | // If the range doesn't includes the entire contents of the
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286 | // block, we must split it, isolating the range in a dedicated
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287 | // block.
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288 | if ( !range.checkStartOfBlock() || !range.checkEndOfBlock() )
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289 | {
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290 | // The resulting block will be a clone of the current one.
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291 | block = block.clone( false );
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292 |
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293 | // Extract the range contents, moving it to the new block.
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294 | range.extractContents().appendTo( block );
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295 | block.trim();
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296 |
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297 | // Split the block. At this point, the range will be in the
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298 | // right position for our intents.
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299 | var splitInfo = range.splitBlock();
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300 |
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301 | removePreviousBr = !splitInfo.wasStartOfBlock;
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302 | removeLastBr = !splitInfo.wasEndOfBlock;
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303 |
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304 | // Insert the new block into the DOM.
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305 | range.insertNode( block );
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306 | }
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307 | }
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308 | else if ( !isLast )
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309 | {
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310 | // LIs are returned as is, with all their children (due to the
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311 | // nested lists). But, the next node is the node right after
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312 | // the current range, which could be an <li> child (nested
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313 | // lists) or the next sibling <li>.
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314 |
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315 | this._.nextNode = ( block.equals( lastNode ) ? null : getNextSourceNode( range.getBoundaryNodes().endNode, 1, lastNode ) );
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316 | }
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317 | }
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318 |
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319 | if ( removePreviousBr )
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320 | {
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321 | var previousSibling = block.getPrevious();
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322 | if ( previousSibling && previousSibling.type == CKEDITOR.NODE_ELEMENT )
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323 | {
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324 | if ( previousSibling.getName() == 'br' )
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325 | previousSibling.remove();
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326 | else if ( previousSibling.getLast() && previousSibling.getLast().$.nodeName.toLowerCase() == 'br' )
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327 | previousSibling.getLast().remove();
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328 | }
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329 | }
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330 |
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331 | if ( removeLastBr )
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332 | {
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333 | var lastChild = block.getLast();
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334 | if ( lastChild && lastChild.type == CKEDITOR.NODE_ELEMENT && lastChild.getName() == 'br' )
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335 | {
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336 | // Take care not to remove the block expanding <br> in non-IE browsers.
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337 | if ( CKEDITOR.env.ie
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338 | || lastChild.getPrevious( bookmarkGuard )
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339 | || lastChild.getNext( bookmarkGuard ) )
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340 | lastChild.remove();
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341 | }
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342 | }
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343 |
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344 | // Get a reference for the next element. This is important because the
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345 | // above block can be removed or changed, so we can rely on it for the
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346 | // next interation.
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347 | if ( !this._.nextNode )
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348 | {
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349 | this._.nextNode = ( isLast || block.equals( lastNode ) ) ? null :
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350 | getNextSourceNode( block, 1, lastNode );
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351 | }
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352 |
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353 | return block;
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354 | }
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355 | };
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356 |
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357 | CKEDITOR.dom.range.prototype.createIterator = function()
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358 | {
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359 | return new iterator( this );
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360 | };
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361 | })();
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