1 | /*
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2 | Copyright (c) 2003-2009, 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 | * @fileOverview Defines the {@link CKEDITOR.dom.text} class, which represents
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8 | * a DOM text node.
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9 | */
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10 |
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11 | /**
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12 | * Represents a DOM text node.
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13 | * @constructor
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14 | * @augments CKEDITOR.dom.node
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15 | * @param {Object|String} text A native DOM text node or a string containing
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16 | * the text to use to create a new text node.
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17 | * @param {CKEDITOR.dom.document} [ownerDocument] The document that will contain
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18 | * the node in case of new node creation. Defaults to the current document.
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19 | * @example
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20 | * var nativeNode = document.createTextNode( 'Example' );
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21 | * var text = CKEDITOR.dom.text( nativeNode );
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22 | * @example
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23 | * var text = CKEDITOR.dom.text( 'Example' );
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24 | */
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25 | CKEDITOR.dom.text = function( text, ownerDocument )
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26 | {
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27 | if ( typeof text == 'string' )
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28 | text = ( ownerDocument ? ownerDocument.$ : document ).createTextNode( text );
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29 |
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30 | // Theoretically, we should call the base constructor here
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31 | // (not CKEDITOR.dom.node though). But, IE doesn't support expando
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32 | // properties on text node, so the features provided by domObject will not
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33 | // work for text nodes (which is not a big issue for us).
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34 | //
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35 | // CKEDITOR.dom.domObject.call( this, element );
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36 |
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37 | /**
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38 | * The native DOM text node represented by this class instance.
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39 | * @type Object
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40 | * @example
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41 | * var element = new CKEDITOR.dom.text( 'Example' );
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42 | * alert( element.$.nodeType ); // "3"
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43 | */
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44 | this.$ = text;
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45 | };
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46 |
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47 | CKEDITOR.dom.text.prototype = new CKEDITOR.dom.node();
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48 |
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49 | CKEDITOR.tools.extend( CKEDITOR.dom.text.prototype,
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50 | /** @lends CKEDITOR.dom.text.prototype */
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51 | {
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52 | /**
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53 | * The node type. This is a constant value set to
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54 | * {@link CKEDITOR.NODE_TEXT}.
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55 | * @type Number
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56 | * @example
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57 | */
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58 | type : CKEDITOR.NODE_TEXT,
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59 |
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60 | getLength : function()
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61 | {
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62 | return this.$.nodeValue.length;
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63 | },
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64 |
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65 | getText : function()
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66 | {
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67 | return this.$.nodeValue;
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68 | },
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69 |
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70 | /**
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71 | * Breaks this text node into two nodes at the specified offset,
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72 | * keeping both in the tree as siblings. This node then only contains
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73 | * all the content up to the offset point. A new text node, which is
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74 | * inserted as the next sibling of this node, contains all the content
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75 | * at and after the offset point. When the offset is equal to the
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76 | * length of this node, the new node has no data.
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77 | * @param {Number} The position at which to split, starting from zero.
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78 | * @returns {CKEDITOR.dom.text} The new text node.
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79 | */
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80 | split : function( offset )
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81 | {
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82 | // If the offset is after the last char, IE creates the text node
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83 | // on split, but don't include it into the DOM. So, we have to do
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84 | // that manually here.
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85 | if ( CKEDITOR.env.ie && offset == this.getLength() )
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86 | {
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87 | var next = this.getDocument().createText( '' );
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88 | next.insertAfter( this );
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89 | return next;
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90 | }
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91 |
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92 | var doc = this.getDocument();
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93 | var retval = new CKEDITOR.dom.text( this.$.splitText( offset ), doc );
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94 |
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95 | // IE BUG: IE8 does not update the childNodes array in DOM after splitText(),
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96 | // we need to make some DOM changes to make it update. (#3436)
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97 | if ( CKEDITOR.env.ie8 )
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98 | {
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99 | var workaround = new CKEDITOR.dom.text( '', doc );
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100 | workaround.insertAfter( retval );
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101 | workaround.remove();
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102 | }
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103 |
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104 | return retval;
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105 | },
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106 |
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107 | /**
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108 | * Extracts characters from indexA up to but not including indexB.
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109 | * @param {Number} indexA An integer between 0 and one less than the
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110 | * length of the text.
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111 | * @param {Number} [indexB] An integer between 0 and the length of the
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112 | * string. If omitted, extracts characters to the end of the text.
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113 | */
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114 | substring : function( indexA, indexB )
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115 | {
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116 | // We need the following check due to a Firefox bug
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117 | // https://bugzilla.mozilla.org/show_bug.cgi?id=458886
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118 | if ( typeof indexB != 'number' )
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119 | return this.$.nodeValue.substr( indexA );
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120 | else
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121 | return this.$.nodeValue.substring( indexA, indexB );
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122 | }
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123 | });
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