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 | (function()
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7 | {
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8 | var pxUnit = CKEDITOR.tools.cssLength,
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9 | needsIEHacks = CKEDITOR.env.ie && ( CKEDITOR.env.ie7Compat || CKEDITOR.env.quirks || CKEDITOR.env.version < 7 );
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10 |
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11 | function getWidth( el )
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12 | {
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13 | return CKEDITOR.env.ie ? el.$.clientWidth : parseInt( el.getComputedStyle( 'width' ), 10 );
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14 | }
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15 |
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16 | function getBorderWidth( element, side )
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17 | {
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18 | var computed = element.getComputedStyle( 'border-' + side + '-width' ),
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19 | borderMap =
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20 | {
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21 | thin: '0px',
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22 | medium: '1px',
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23 | thick: '2px'
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24 | };
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25 |
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26 | if ( computed.indexOf( 'px' ) < 0 )
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27 | {
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28 | // look up keywords
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29 | if ( computed in borderMap && element.getComputedStyle( 'border-style' ) != 'none' )
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30 | computed = borderMap[ computed ];
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31 | else
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32 | computed = 0;
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33 | }
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34 |
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35 | return parseInt( computed, 10 );
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36 | }
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37 |
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38 | // Gets the table row that contains the most columns.
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39 | function getMasterPillarRow( table )
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40 | {
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41 | var $rows = table.$.rows,
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42 | maxCells = 0, cellsCount,
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43 | $elected, $tr;
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44 |
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45 | for ( var i = 0, len = $rows.length ; i < len; i++ )
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46 | {
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47 | $tr = $rows[ i ];
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48 | cellsCount = $tr.cells.length;
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49 |
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50 | if ( cellsCount > maxCells )
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51 | {
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52 | maxCells = cellsCount;
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53 | $elected = $tr;
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54 | }
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55 | }
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56 |
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57 | return $elected;
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58 | }
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59 |
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60 | function buildTableColumnPillars( table )
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61 | {
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62 | var pillars = [],
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63 | pillarIndex = -1,
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64 | rtl = ( table.getComputedStyle( 'direction' ) == 'rtl' );
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65 |
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66 | // Get the raw row element that cointains the most columns.
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67 | var $tr = getMasterPillarRow( table );
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68 |
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69 | // Get the tbody element and position, which will be used to set the
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70 | // top and bottom boundaries.
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71 | var tbody = new CKEDITOR.dom.element( table.$.tBodies[ 0 ] ),
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72 | tbodyPosition = tbody.getDocumentPosition();
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73 |
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74 | // Loop thorugh all cells, building pillars after each one of them.
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75 | for ( var i = 0, len = $tr.cells.length ; i < len ; i++ )
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76 | {
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77 | // Both the current cell and the successive one will be used in the
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78 | // pillar size calculation.
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79 | var td = new CKEDITOR.dom.element( $tr.cells[ i ] ),
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80 | nextTd = $tr.cells[ i + 1 ] && new CKEDITOR.dom.element( $tr.cells[ i + 1 ] );
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81 |
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82 | pillarIndex += td.$.colSpan || 1;
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83 |
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84 | // Calculate the pillar boundary positions.
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85 | var pillarLeft, pillarRight, pillarWidth;
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86 |
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87 | var x = td.getDocumentPosition().x;
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88 |
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89 | // Calculate positions based on the current cell.
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90 | rtl ?
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91 | pillarRight = x + getBorderWidth( td, 'left' ) :
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92 | pillarLeft = x + td.$.offsetWidth - getBorderWidth( td, 'right' );
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93 |
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94 | // Calculate positions based on the next cell, if available.
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95 | if ( nextTd )
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96 | {
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97 | x = nextTd.getDocumentPosition().x;
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98 |
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99 | rtl ?
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100 | pillarLeft = x + nextTd.$.offsetWidth - getBorderWidth( nextTd, 'right' ) :
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101 | pillarRight = x + getBorderWidth( nextTd, 'left' );
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102 | }
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103 | // Otherwise calculate positions based on the table (for last cell).
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104 | else
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105 | {
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106 | x = table.getDocumentPosition().x;
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107 |
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108 | rtl ?
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109 | pillarLeft = x :
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110 | pillarRight = x + table.$.offsetWidth;
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111 | }
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112 |
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113 | pillarWidth = Math.max( pillarRight - pillarLeft, 3 );
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114 |
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115 | // The pillar should reflects exactly the shape of the hovered
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116 | // column border line.
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117 | pillars.push( {
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118 | table : table,
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119 | index : pillarIndex,
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120 | x : pillarLeft,
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121 | y : tbodyPosition.y,
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122 | width : pillarWidth,
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123 | height : tbody.$.offsetHeight,
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124 | rtl : rtl } );
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125 | }
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126 |
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127 | return pillars;
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128 | }
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129 |
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130 | function getPillarAtPosition( pillars, positionX )
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131 | {
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132 | for ( var i = 0, len = pillars.length ; i < len ; i++ )
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133 | {
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134 | var pillar = pillars[ i ];
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135 |
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136 | if ( positionX >= pillar.x && positionX <= ( pillar.x + pillar.width ) )
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137 | return pillar;
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138 | }
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139 |
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140 | return null;
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141 | }
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142 |
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143 | function cancel( evt )
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144 | {
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145 | ( evt.data || evt ).preventDefault();
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146 | }
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147 |
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148 | function columnResizer( editor )
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149 | {
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150 | var pillar,
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151 | document,
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152 | resizer,
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153 | isResizing,
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154 | startOffset,
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155 | currentShift;
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156 |
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157 | var leftSideCells, rightSideCells, leftShiftBoundary, rightShiftBoundary;
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158 |
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159 | function detach()
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160 | {
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161 | pillar = null;
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162 | currentShift = 0;
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163 | isResizing = 0;
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164 |
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165 | document.removeListener( 'mouseup', onMouseUp );
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166 | resizer.removeListener( 'mousedown', onMouseDown );
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167 | resizer.removeListener( 'mousemove', onMouseMove );
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168 |
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169 | document.getBody().setStyle( 'cursor', 'auto' );
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170 |
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171 | // Hide the resizer (remove it on IE7 - #5890).
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172 | needsIEHacks ? resizer.remove() : resizer.hide();
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173 | }
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174 |
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175 | function resizeStart()
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176 | {
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177 | // Before starting to resize, figure out which cells to change
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178 | // and the boundaries of this resizing shift.
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179 |
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180 | var columnIndex = pillar.index,
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181 | map = CKEDITOR.tools.buildTableMap( pillar.table ),
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182 | leftColumnCells = [],
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183 | rightColumnCells = [],
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184 | leftMinSize = Number.MAX_VALUE,
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185 | rightMinSize = leftMinSize,
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186 | rtl = pillar.rtl;
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187 |
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188 | for ( var i = 0, len = map.length ; i < len ; i++ )
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189 | {
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190 | var row = map[ i ],
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191 | leftCell = row[ columnIndex + ( rtl ? 1 : 0 ) ],
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192 | rightCell = row[ columnIndex + ( rtl ? 0 : 1 ) ];
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193 |
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194 | leftCell = leftCell && new CKEDITOR.dom.element( leftCell );
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195 | rightCell = rightCell && new CKEDITOR.dom.element( rightCell );
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196 |
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197 | if ( !leftCell || !rightCell || !leftCell.equals( rightCell ) )
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198 | {
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199 | leftCell && ( leftMinSize = Math.min( leftMinSize, getWidth( leftCell ) ) );
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200 | rightCell && ( rightMinSize = Math.min( rightMinSize, getWidth( rightCell ) ) );
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201 |
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202 | leftColumnCells.push( leftCell );
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203 | rightColumnCells.push( rightCell );
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204 | }
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205 | }
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206 |
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207 | // Cache the list of cells to be resized.
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208 | leftSideCells = leftColumnCells;
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209 | rightSideCells = rightColumnCells;
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210 |
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211 | // Cache the resize limit boundaries.
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212 | leftShiftBoundary = pillar.x - leftMinSize;
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213 | rightShiftBoundary = pillar.x + rightMinSize;
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214 |
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215 | resizer.setOpacity( 0.5 );
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216 | startOffset = parseInt( resizer.getStyle( 'left' ), 10 );
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217 | currentShift = 0;
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218 | isResizing = 1;
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219 |
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220 | resizer.on( 'mousemove', onMouseMove );
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221 |
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222 | // Prevent the native drag behavior otherwise 'mousemove' won't fire.
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223 | document.on( 'dragstart', cancel );
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224 | }
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225 |
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226 | function resizeEnd()
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227 | {
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228 | isResizing = 0;
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229 |
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230 | resizer.setOpacity( 0 );
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231 |
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232 | currentShift && resizeColumn();
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233 |
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234 | var table = pillar.table;
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235 | setTimeout( function () { table.removeCustomData( '_cke_table_pillars' ); }, 0 );
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236 |
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237 | document.removeListener( 'dragstart', cancel );
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238 | }
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239 |
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240 | function resizeColumn()
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241 | {
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242 | var rtl = pillar.rtl,
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243 | cellsCount = rtl ? rightSideCells.length : leftSideCells.length;
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244 |
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245 | // Perform the actual resize to table cells, only for those by side of the pillar.
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246 | for ( var i = 0 ; i < cellsCount ; i++ )
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247 | {
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248 | var leftCell = leftSideCells[ i ],
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249 | rightCell = rightSideCells[ i ],
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250 | table = pillar.table;
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251 |
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252 | // Defer the resizing to avoid any interference among cells.
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253 | CKEDITOR.tools.setTimeout(
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254 | function( leftCell, leftOldWidth, rightCell, rightOldWidth, tableWidth, sizeShift )
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255 | {
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256 | leftCell && leftCell.setStyle( 'width', pxUnit( Math.max( leftOldWidth + sizeShift, 0 ) ) );
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257 | rightCell && rightCell.setStyle( 'width', pxUnit( Math.max( rightOldWidth - sizeShift, 0 ) ) );
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258 |
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259 | // If we're in the last cell, we need to resize the table as well
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260 | if ( tableWidth )
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261 | table.setStyle( 'width', pxUnit( tableWidth + sizeShift * ( rtl ? -1 : 1 ) ) );
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262 | }
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263 | , 0,
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264 | this, [
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265 | leftCell, leftCell && getWidth( leftCell ),
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266 | rightCell, rightCell && getWidth( rightCell ),
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267 | ( !leftCell || !rightCell ) && ( getWidth( table ) + getBorderWidth( table, 'left' ) + getBorderWidth( table, 'right' ) ),
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268 | currentShift ] );
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269 | }
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270 | }
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271 |
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272 | function onMouseDown( evt )
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273 | {
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274 | cancel( evt );
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275 |
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276 | resizeStart();
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277 |
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278 | document.on( 'mouseup', onMouseUp, this );
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279 | }
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280 |
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281 | function onMouseUp( evt )
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282 | {
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283 | evt.removeListener();
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284 |
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285 | resizeEnd();
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286 | }
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287 |
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288 | function onMouseMove( evt )
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289 | {
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290 | move( evt.data.$.clientX );
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291 | }
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292 |
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293 | document = editor.document;
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294 |
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295 | resizer = CKEDITOR.dom.element.createFromHtml(
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296 | '<div data-cke-temp=1 contenteditable=false unselectable=on '+
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297 | 'style="position:absolute;cursor:col-resize;filter:alpha(opacity=0);opacity:0;' +
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298 | 'padding:0;background-color:#004;background-image:none;border:0px none;z-index:10"></div>', document );
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299 |
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300 | // Except on IE6/7 (#5890), place the resizer after body to prevent it
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301 | // from being editable.
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302 | if ( !needsIEHacks )
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303 | document.getDocumentElement().append( resizer );
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304 |
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305 | this.attachTo = function( targetPillar )
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306 | {
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307 | // Accept only one pillar at a time.
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308 | if ( isResizing )
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309 | return;
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310 |
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311 | // On IE6/7, we append the resizer everytime we need it. (#5890)
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312 | if ( needsIEHacks )
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313 | {
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314 | document.getBody().append( resizer );
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315 | currentShift = 0;
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316 | }
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317 |
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318 | pillar = targetPillar;
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319 |
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320 | resizer.setStyles(
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321 | {
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322 | width: pxUnit( targetPillar.width ),
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323 | height : pxUnit( targetPillar.height ),
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324 | left : pxUnit( targetPillar.x ),
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325 | top : pxUnit( targetPillar.y )
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326 | });
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327 |
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328 | // In IE6/7, it's not possible to have custom cursors for floating
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329 | // elements in an editable document. Show the resizer in that case,
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330 | // to give the user a visual clue.
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331 | needsIEHacks && resizer.setOpacity( 0.25 );
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332 |
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333 | resizer.on( 'mousedown', onMouseDown, this );
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334 |
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335 | document.getBody().setStyle( 'cursor', 'col-resize' );
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336 |
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337 | // Display the resizer to receive events but don't show it,
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338 | // only change the cursor to resizable shape.
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339 | resizer.show();
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340 | };
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341 |
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342 | var move = this.move = function( posX )
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343 | {
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344 | if ( !pillar )
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345 | return 0;
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346 |
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347 | if ( !isResizing && ( posX < pillar.x || posX > ( pillar.x + pillar.width ) ) )
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348 | {
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349 | detach();
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350 | return 0;
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351 | }
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352 |
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353 | var resizerNewPosition = posX - Math.round( resizer.$.offsetWidth / 2 );
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354 |
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355 | if ( isResizing )
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356 | {
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357 | if ( resizerNewPosition == leftShiftBoundary || resizerNewPosition == rightShiftBoundary )
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358 | return 1;
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359 |
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360 | resizerNewPosition = Math.max( resizerNewPosition, leftShiftBoundary );
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361 | resizerNewPosition = Math.min( resizerNewPosition, rightShiftBoundary );
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362 |
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363 | currentShift = resizerNewPosition - startOffset;
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364 | }
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365 |
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366 | resizer.setStyle( 'left', pxUnit( resizerNewPosition ) );
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367 |
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368 | return 1;
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369 | };
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370 | }
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371 |
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372 | function clearPillarsCache( evt )
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373 | {
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374 | var target = evt.data.getTarget();
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375 |
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376 | if ( evt.name == 'mouseout' )
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377 | {
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378 | // Bypass interal mouse move.
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379 | if ( !target.is ( 'table' ) )
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380 | return;
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381 |
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382 | var dest = new CKEDITOR.dom.element( evt.data.$.relatedTarget || evt.data.$.toElement );
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383 | while( dest && dest.$ && !dest.equals( target ) && !dest.is( 'body' ) )
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384 | dest = dest.getParent();
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385 | if ( !dest || dest.equals( target ) )
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386 | return;
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387 | }
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388 |
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389 | target.getAscendant( 'table', 1 ).removeCustomData( '_cke_table_pillars' );
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390 | evt.removeListener();
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391 | }
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392 |
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393 | CKEDITOR.plugins.add( 'tableresize',
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394 | {
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395 | requires : [ 'tabletools' ],
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396 | init : function( editor )
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397 | {
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398 | editor.on( 'contentDom', function()
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399 | {
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400 | var resizer;
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401 |
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402 | editor.document.getBody().on( 'mousemove', function( evt )
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403 | {
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404 | evt = evt.data;
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405 |
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406 | // If we're already attached to a pillar, simply move the
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407 | // resizer.
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408 | if ( resizer && resizer.move( evt.$.clientX ) )
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409 | {
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410 | cancel( evt );
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411 | return;
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412 | }
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413 |
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414 | // Considering table, tr, td, tbody but nothing else.
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415 | var target = evt.getTarget(),
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416 | table,
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417 | pillars;
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418 |
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419 | if ( !target.is( 'table' ) && !target.getAscendant( 'tbody', 1 ) )
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420 | return;
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421 |
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422 | table = target.getAscendant( 'table', 1 );
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423 |
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424 | if ( !( pillars = table.getCustomData( '_cke_table_pillars' ) ) )
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425 | {
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426 | // Cache table pillars calculation result.
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427 | table.setCustomData( '_cke_table_pillars', ( pillars = buildTableColumnPillars( table ) ) );
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428 | table.on( 'mouseout', clearPillarsCache );
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429 | table.on( 'mousedown', clearPillarsCache );
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430 | }
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431 |
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432 | var pillar = getPillarAtPosition( pillars, evt.$.clientX );
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433 | if ( pillar )
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434 | {
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435 | !resizer && ( resizer = new columnResizer( editor ) );
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436 | resizer.attachTo( pillar );
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437 | }
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438 | });
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439 | });
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440 | }
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441 | });
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442 |
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443 | })();
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