1 | /*
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2 | * file: IndentAction.js
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3 | *
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4 | * @BEGINLICENSE
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5 | * Copyright 2010 Brook Novak (email : [email protected])
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6 | * This program is free software; you can redistribute it and/or modify
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7 | * it under the terms of the GNU General Public License as published by
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8 | * the Free Software Foundation; either version 2 of the License, or
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9 | * (at your option) any later version.
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10 | * This program is distributed in the hope that it will be useful,
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11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 | * GNU General Public License for more details.
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14 | * You should have received a copy of the GNU General Public License
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15 | * along with this program; if not, write to the Free Software
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16 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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17 | * @ENDLICENSE
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18 | */
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19 |
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20 | // @DEPENDS: UndoMan
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21 | bootstrap.provides("actions.IndentAction");
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22 |
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23 | (function() {
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24 |
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25 | /**
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26 | * The amount of pixels to adjust margins when increasing and decreasing indents.
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27 | * @type Number
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28 | */
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29 | var INDENT_WIDTH = 20,
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30 | undentableBlocks = $createLookupMap("dt,dd,caption,colgroup,col,thead,tfoot,tbody,tr,td,th,legend,optgroup,option,area,frame");
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31 |
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32 | _registerAction("Indent", {
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33 | /**
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34 | * An undoable indentation action. Increases or decreases left indents on container elements in a given range.
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35 | * If nodes in the given range should be indented but do not have a container, a new container is created for them.
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36 | *
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37 | * @author Brook Novak
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38 | *
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39 | * @param {Boolean} increase True to increase indents in range, false to decrease indents.
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40 | *
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41 | * @param {Node} startNode (Optional) The starting dom node of the range to align.
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42 | * If not provided then the current selection will be used.
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43 | * If provieded must also provide endNode
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44 | *
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45 | * @param {Node} endNode (Optional) The ending dom node of the range to align. Can be the same as start node
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46 | * If not provided then the current selection will be used.
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47 | *
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48 | *
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49 | */
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50 | exec : function(increase, startNode, endNode) {
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51 |
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52 | // Auto-set range if not provided.
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53 | if (!startNode) {
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54 |
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55 | if (!this.selBefore)
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56 | return; // Nothing to select
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57 |
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58 | if (this.selBefore.endNode) {
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59 | startNode = this.selBeforeOrdered.startNode;
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60 | endNode = this.selBeforeOrdered.endNode;
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61 | } else
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62 | startNode = endNode = this.selBefore.startNode;
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63 |
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64 | }
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65 |
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66 | debug.assert(endNode, "Supplied start node but not the end node");
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67 |
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68 | var containers;
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69 |
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70 | // First check for special case: If the ranges first block level common ancestor
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71 | // is a list item, then indent the list item rather than normalizing within a list item.
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72 | var ca = _getCommonAncestor(startNode, endNode);
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73 | for (var level = 0; level < 2; level++) {
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74 | while (ca != docBody && !_isBlockLevel(ca)) {
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75 | ca = ca.parentNode;
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76 | }
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77 |
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78 | if (ca == docBody)
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79 | break;
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80 |
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81 | if (_nodeName(ca) == "li") {
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82 | containers = [ca];
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83 | break;
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84 | }
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85 | ca = ca.parentNode;
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86 | }
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87 |
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88 | if (!containers)
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89 | // Normalize containers in range and get list of all the containers
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90 | containers = _getNormalizedContainerRange(startNode, endNode);
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91 |
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92 | // Record all indentable containers in the given range
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93 | for (var i in containers) {
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94 | if (!undentableBlocks[_nodeName(containers[i])]) {
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95 |
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96 | var con = containers[i];
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97 |
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98 | // Determine the containers left margin in pixels
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99 | var marginToParse = (con.style.marginLeft && con.style.marginLeft.toLowerCase() != "auto") ?
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100 | con.style.marginLeft : null;
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101 |
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102 | // If margin is default/auto, get the computed style to make sure
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103 | if (!marginToParse)
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104 | marginToParse = _getComputedStyle(con, "margin-left");
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105 |
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106 | marginToParse = (marginToParse && marginToParse.toLowerCase() != "auto") ?
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107 | marginToParse : "0";
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108 |
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109 | // Parse intentation numberic value
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110 | var marginPixels;
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111 | if (marginToParse.indexOf("%") != -1) {
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112 | // Convert percentage into pixels by using the containers relative offset
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113 | marginPixels = con.offsetLeft;
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114 |
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115 | } else marginPixels = parseInt(marginToParse);
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116 |
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117 | var newMarginLen = marginPixels + ((increase ? 1 : -1) * INDENT_WIDTH);
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118 |
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119 | // Clip margin to zero
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120 | if (newMarginLen < 0)
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121 | newMarginLen = 0;
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122 |
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123 | // Assign new margin
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124 | if (marginPixels != newMarginLen)
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125 | _execOp(_Operation.SET_CSS_STYLE, con, "marginLeft", newMarginLen + "px");
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126 |
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127 | }
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128 | }
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129 |
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130 | this.selAfter = this.selBefore;
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131 |
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132 | }
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133 | });
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134 |
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135 | })();
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