[795] | 1 | /* |
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| 2 | * FCKeditor - The text editor for Internet - http://www.fckeditor.net |
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| 3 | * Copyright (C) 2003-2007 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 implentation 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 clonning (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 | if ( startNode.childNodes.length > 0 && startOffset <= startNode.childNodes.length - 1 ) |
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| 265 | { |
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| 266 | // If the offset points to the first node, we don't have a |
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| 267 | // sibling, so let's use the first one, but mark it for removal. |
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| 268 | if ( startOffset == 0 ) |
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| 269 | { |
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| 270 | // Let's create a temporary node and mark it for removal. |
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| 271 | startNode = startNode.insertBefore( this._Document.createTextNode(''), startNode.firstChild ) ; |
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| 272 | removeStartNode = true ; |
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| 273 | } |
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| 274 | else |
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| 275 | startNode = startNode.childNodes[ startOffset ].previousSibling ; |
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| 276 | } |
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| 277 | } |
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| 278 | |
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| 279 | // Get the parent nodes tree for the start and end boundaries. |
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| 280 | var startParents = FCKDomTools.GetParents( startNode ) ; |
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| 281 | var endParents = FCKDomTools.GetParents( endNode ) ; |
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| 282 | |
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| 283 | // Compare them, to find the top most siblings. |
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| 284 | var i, topStart, topEnd ; |
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| 285 | |
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| 286 | for ( i = 0 ; i < startParents.length ; i++ ) |
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| 287 | { |
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| 288 | topStart = startParents[i] ; |
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| 289 | topEnd = endParents[i] ; |
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| 290 | |
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| 291 | // The compared nodes will match until we find the top most |
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| 292 | // siblings (different nodes that have the same parent). |
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| 293 | // "i" will hold the index in the parants array for the top |
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| 294 | // most element. |
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| 295 | if ( topStart != topEnd ) |
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| 296 | break ; |
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| 297 | } |
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| 298 | |
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| 299 | var clone, levelStartNode, levelClone, currentNode, currentSibling ; |
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| 300 | |
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| 301 | if ( docFrag ) |
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| 302 | clone = docFrag.RootNode ; |
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| 303 | |
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| 304 | // Remove all successive sibling nodes for every node in the |
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| 305 | // startParents tree. |
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| 306 | for ( var j = i ; j < startParents.length ; j++ ) |
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| 307 | { |
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| 308 | levelStartNode = startParents[j] ; |
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| 309 | |
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| 310 | // For Extract and Clone, we must clone this level. |
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| 311 | if ( clone && levelStartNode != startNode ) // action = 0 = Delete |
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| 312 | levelClone = clone.appendChild( levelStartNode.cloneNode( levelStartNode == startNode ) ) ; |
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| 313 | |
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| 314 | currentNode = levelStartNode.nextSibling ; |
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| 315 | |
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| 316 | while( currentNode ) |
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| 317 | { |
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| 318 | // Stop processing when the current node matches a node in the |
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| 319 | // endParents tree or if it is the endNode. |
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| 320 | if ( currentNode == endParents[j] || currentNode == endNode ) |
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| 321 | break ; |
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| 322 | |
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| 323 | // Cache the next sibling. |
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| 324 | currentSibling = currentNode.nextSibling ; |
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| 325 | |
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| 326 | // If clonning, just clone it. |
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| 327 | if ( action == 2 ) // 2 = Clone |
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| 328 | clone.appendChild( currentNode.cloneNode( true ) ) ; |
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| 329 | else |
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| 330 | { |
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| 331 | // Both Delete and Extract will remove the node. |
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| 332 | currentNode.parentNode.removeChild( currentNode ) ; |
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| 333 | |
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| 334 | // When Extracting, move the removed node to the docFrag. |
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| 335 | if ( action == 1 ) // 1 = Extract |
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| 336 | clone.appendChild( currentNode ) ; |
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| 337 | } |
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| 338 | |
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| 339 | currentNode = currentSibling ; |
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| 340 | } |
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| 341 | |
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| 342 | if ( clone ) |
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| 343 | clone = levelClone ; |
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| 344 | } |
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| 345 | |
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| 346 | if ( docFrag ) |
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| 347 | clone = docFrag.RootNode ; |
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| 348 | |
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| 349 | // Remove all previous sibling nodes for every node in the |
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| 350 | // endParents tree. |
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| 351 | for ( var k = i ; k < endParents.length ; k++ ) |
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| 352 | { |
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| 353 | levelStartNode = endParents[k] ; |
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| 354 | |
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| 355 | // For Extract and Clone, we must clone this level. |
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| 356 | if ( action > 0 && levelStartNode != endNode ) // action = 0 = Delete |
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| 357 | levelClone = clone.appendChild( levelStartNode.cloneNode( levelStartNode == endNode ) ) ; |
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| 358 | |
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| 359 | // The processing of siblings may have already been done by the parent. |
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| 360 | if ( !startParents[k] || levelStartNode.parentNode != startParents[k].parentNode ) |
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| 361 | { |
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| 362 | currentNode = levelStartNode.previousSibling ; |
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| 363 | |
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| 364 | while( currentNode ) |
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| 365 | { |
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| 366 | // Stop processing when the current node matches a node in the |
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| 367 | // startParents tree or if it is the startNode. |
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| 368 | if ( currentNode == startParents[k] || currentNode == startNode ) |
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| 369 | break ; |
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| 370 | |
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| 371 | // Cache the next sibling. |
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| 372 | currentSibling = currentNode.previousSibling ; |
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| 373 | |
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| 374 | // If clonning, just clone it. |
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| 375 | if ( action == 2 ) // 2 = Clone |
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| 376 | clone.insertBefore( currentNode.cloneNode( true ), clone.firstChild ) ; |
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| 377 | else |
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| 378 | { |
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| 379 | // Both Delete and Extract will remove the node. |
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| 380 | currentNode.parentNode.removeChild( currentNode ) ; |
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| 381 | |
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| 382 | // When Extracting, mode the removed node to the docFrag. |
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| 383 | if ( action == 1 ) // 1 = Extract |
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| 384 | clone.insertBefore( currentNode, clone.firstChild ) ; |
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| 385 | } |
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| 386 | |
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| 387 | currentNode = currentSibling ; |
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| 388 | } |
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| 389 | } |
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| 390 | |
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| 391 | if ( clone ) |
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| 392 | clone = levelClone ; |
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| 393 | } |
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| 394 | |
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| 395 | if ( action == 2 ) // 2 = Clone. |
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| 396 | { |
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| 397 | // No changes in the DOM should be done, so fix the split text (if any). |
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| 398 | |
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| 399 | var startTextNode = this.startContainer ; |
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| 400 | if ( startTextNode.nodeType == 3 ) |
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| 401 | { |
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| 402 | startTextNode.data += startTextNode.nextSibling.data ; |
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| 403 | startTextNode.parentNode.removeChild( startTextNode.nextSibling ) ; |
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| 404 | } |
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| 405 | |
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| 406 | var endTextNode = this.endContainer ; |
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| 407 | if ( endTextNode.nodeType == 3 && endTextNode.nextSibling ) |
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| 408 | { |
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| 409 | endTextNode.data += endTextNode.nextSibling.data ; |
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| 410 | endTextNode.parentNode.removeChild( endTextNode.nextSibling ) ; |
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| 411 | } |
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| 412 | } |
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| 413 | else |
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| 414 | { |
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| 415 | // Collapse the range. |
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| 416 | |
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| 417 | // If a node has been partially selected, collapse the range between |
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| 418 | // topStart and topEnd. Otherwise, simply collapse it to the start. (W3C specs). |
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| 419 | if ( topStart && topEnd && ( startNode.parentNode != topStart.parentNode || endNode.parentNode != topEnd.parentNode ) ) |
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| 420 | this.setStart( topEnd.parentNode, FCKDomTools.GetIndexOf( topEnd ) ) ; |
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| 421 | |
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| 422 | // Collapse it to the start. |
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| 423 | this.collapse( true ) ; |
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| 424 | } |
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| 425 | |
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| 426 | // Cleanup any marked node. |
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| 427 | if( removeStartNode ) |
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| 428 | startNode.parentNode.removeChild( startNode ) ; |
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| 429 | |
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| 430 | if( removeEndNode && endNode.parentNode ) |
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| 431 | endNode.parentNode.removeChild( endNode ) ; |
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| 432 | }, |
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| 433 | |
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| 434 | cloneRange : function() |
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| 435 | { |
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| 436 | return FCKW3CRange.CreateFromRange( this._Document, this ) ; |
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| 437 | }, |
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| 438 | |
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| 439 | toString : function() |
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| 440 | { |
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| 441 | var docFrag = this.cloneContents() ; |
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| 442 | |
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| 443 | var tmpDiv = this._Document.createElement( 'div' ) ; |
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| 444 | docFrag.AppendTo( tmpDiv ) ; |
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| 445 | |
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| 446 | return tmpDiv.textContent || tmpDiv.innerText ; |
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| 447 | } |
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| 448 | } ; |
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