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annotate src/plugins/undo.js @ 13:8d32537e0ca7

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author Franklin Schmidt <fschmidt@gmail.com>
date Sun, 07 Aug 2022 14:28:14 -0600
parents b7725dab7482
children ea32a44b5a6e
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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0
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1 (function (sceditor) {
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2 'use strict';
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3
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4 sceditor.plugins.undo = function () {
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5 var base = this;
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6 var sourceEditor;
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7 var editor;
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8 var body;
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9 var lastInputType = '';
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10 var charChangedCount = 0;
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11 var isInPatchedFn = false;
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12 /**
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13 * If currently restoring a state
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14 * Should ignore events while it's happening
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15 */
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16 var isApplying = false;
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17 /**
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18 * If current selection change event has already been stored
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19 */
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20 var isSelectionChangeHandled = false;
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21
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22 var undoLimit = 50;
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23 var undoStates = [];
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24 var redoPosition = 0;
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25 var lastState;
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26
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27 /**
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28 * Sets the editor to the specified state.
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29 * @param {Object} state
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30 * @private
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31 */
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32 function applyState(state) {
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33 isApplying = true;
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34 editor.sourceMode(state.sourceMode);
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35
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36 if (state.sourceMode) {
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37 editor.val(state.value, false);
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38 editor.sourceEditorCaret(state.caret);
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39 } else {
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40 editor.getBody().innerHTML = state.value;
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41
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42 var range = editor.getRangeHelper().selectedRange();
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43 setRangePositions(range, state.caret);
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44 editor.getRangeHelper().selectRange(range);
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45 }
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46
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47 editor.focus();
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48 isApplying = false;
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49 };
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50
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51 /**
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52 * Patches a function on the object to call store() after invocation
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53 * @param {Object} obj
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54 * @param {string} fn
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55 */
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56 function patch(obj, fn) {
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57 var origFn = obj[fn];
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58 obj[fn] = function () {
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59 // sourceMode calls other patched methods so need to ignore them
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60 var ignore = isInPatchedFn;
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61
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62 // Store caret position before any change is made
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63 if (!ignore && !isApplying && lastState &&
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64 editor.getRangeHelper().hasSelection()) {
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65 updateLastState();
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66 }
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67
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68 isInPatchedFn = true;
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69 origFn.apply(this, arguments);
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70
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71 if (!ignore) {
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72 isInPatchedFn = false;
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73
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74 if (!isApplying) {
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75 storeState();
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76 lastInputType = '';
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77 }
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78 }
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79 };
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80 }
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81
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82 /**
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83 * Stores the editors current state
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84 */
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85 function storeState() {
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86 if (redoPosition) {
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87 undoStates.length -= redoPosition;
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88 redoPosition = 0;
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89 }
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90
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91 if (undoLimit > 0 && undoStates.length > undoLimit) {
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92 undoStates.shift();
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93 }
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94
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95 lastState = {};
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96 updateLastState();
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97 undoStates.push(lastState);
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98 }
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99
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100 /**
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101 * Updates the last saved state with the editors current state
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102 */
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103 function updateLastState() {
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104 var sourceMode = editor.sourceMode();
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105 lastState.caret = sourceMode ? editor.sourceEditorCaret() :
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106 getRangePositions(editor.getRangeHelper().selectedRange());
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107 lastState.sourceMode = sourceMode;
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108 lastState.value = sourceMode ?
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109 editor.getSourceEditorValue(false) :
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110 editor.getBody().innerHTML;
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111 }
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112
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113 base.init = function () {
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114 // The this variable will be set to the instance of the editor
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115 // calling it, hence why the plugins "this" is saved to the base
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116 // variable.
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117 editor = this;
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118
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119 undoLimit = editor.undoLimit || undoLimit;
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120
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121 editor.addShortcut('ctrl+z', base.undo);
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122 editor.addShortcut('ctrl+shift+z', base.redo);
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123 editor.addShortcut('ctrl+y', base.redo);
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124 };
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125
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126 function documentSelectionChangeHandler() {
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127 if (sourceEditor === document.activeElement) {
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128 base.signalSelectionchangedEvent();
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129 }
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130 }
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131
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132 base.signalReady = function () {
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133 sourceEditor = editor.getContentAreaContainer().nextSibling;
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134 body = editor.getBody();
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135
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136 // Store initial state
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137 storeState();
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138
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139 // Patch methods that allow inserting content into the editor
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140 // programmatically
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141 // TODO: remove this when there is a built in event to handle it
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142 patch(editor, 'setWysiwygEditorValue');
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143 patch(editor, 'setSourceEditorValue');
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144 patch(editor, 'sourceEditorInsertText');
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145 patch(editor.getRangeHelper(), 'insertNode');
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146 patch(editor, 'toggleSourceMode');
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147
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148 /**
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149 * Handles the before input event so can override built in
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150 * undo / redo
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151 * @param {InputEvent} e
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152 */
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153 function beforeInputHandler(e) {
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154 if (e.inputType === 'historyUndo') {
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155 base.undo();
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156 e.preventDefault();
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157 } else if (e.inputType === 'historyRedo') {
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158 base.redo();
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Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
159 e.preventDefault();
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
160 }
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
161 }
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
162
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
163 body.addEventListener('beforeinput', beforeInputHandler);
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
164 sourceEditor.addEventListener('beforeinput', beforeInputHandler);
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
165
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
166 /**
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
167 * Should always store state at the end of composing
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
168 */
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
169 function compositionHandler() {
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
170 lastInputType = '';
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
171 storeState();
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
172 }
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
173 body.addEventListener('compositionend', compositionHandler);
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
174 sourceEditor.addEventListener('compositionend', compositionHandler);
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
175
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
176 // Chrome doesn't trigger selectionchange on textarea so need to
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
177 // listen to global event
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
178 document.addEventListener('selectionchange',
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
179 documentSelectionChangeHandler);
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
180 };
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
181
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
182 base.destroy = function () {
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
183 document.removeEventListener('selectionchange',
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
184 documentSelectionChangeHandler);
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
185 };
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
186
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
187 base.undo = function () {
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
188 lastState = null;
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
189
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
190 if (redoPosition < undoStates.length - 1) {
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
191 redoPosition++;
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
192 applyState(undoStates[undoStates.length - 1 - redoPosition]);
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
193 }
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
194
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
195 return false;
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
196 };
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
197
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
198 base.redo = function () {
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
199 if (redoPosition > 0) {
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
200 redoPosition--;
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
201 applyState(undoStates[undoStates.length - 1 - redoPosition]);
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
202 }
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
203
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
204 return false;
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
205 };
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
206
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
207 /**
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
208 * Handle the selectionchanged event so can store the last caret
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
209 * position before the input so undoing places it in the right place
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
210 */
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
211 base.signalSelectionchangedEvent = function () {
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
212 if (isApplying || isSelectionChangeHandled) {
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
213 isSelectionChangeHandled = false;
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
214 return;
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
215 }
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
216 if (lastState) {
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
217 updateLastState();
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
218 }
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
219 lastInputType = '';
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
220 };
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
221
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
222 /**
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
223 * Handles the input event
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
224 * @param {InputEvent} e
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
225 */
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
226 base.signalInputEvent = function (e) {
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
227 // InputType is one of
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
228 // https://rawgit.com/w3c/input-events/v1/index.html#interface-InputEvent-Attributes
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
229 // Most should cause a full undo item to be added so only need to
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
230 // handle a few of them
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
231 var inputType = e.inputType;
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
232
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
233 // Should ignore selection changes that occur because of input
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
234 // events as already handling them
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
235 isSelectionChangeHandled = true;
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
236
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
237 // inputType should be supported by all supported browsers
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
238 // except IE 11 in runWithoutWysiwygSupport. Shouldn't be an issue
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
239 // as native handling will mostly work there.
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
240 // Ignore if composing as will handle composition end instead
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
241 if (!inputType || e.isComposing) {
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
242 return;
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
243 }
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
244
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
245 switch (e.inputType) {
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
246 case 'deleteContentBackward':
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
247 if (lastState && lastInputType === inputType &&
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
248 charChangedCount < 20) {
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
249 updateLastState();
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
250 } else {
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
251 storeState();
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
252 charChangedCount = 0;
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
253 }
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
254
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
255 lastInputType = inputType;
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
256 break;
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
257
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
258 case 'insertText':
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
259 charChangedCount += e.data ? e.data.length : 1;
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
260
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
261 if (lastState && lastInputType === inputType &&
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
262 charChangedCount < 20 && !/\s$/.test(e.data)) {
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
263 updateLastState();
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
264 } else {
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
265 storeState();
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
266 charChangedCount = 0;
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
267 }
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
268
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
269 lastInputType = inputType;
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
270 break;
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
271 default:
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
272 lastInputType = 'sce-misc';
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
273 charChangedCount = 0;
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
274 storeState();
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
275 break;
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
276 }
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
277 };
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
278
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
279 /**
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
280 * Creates a positions object form passed range
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
281 * @param {Range} range
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
282 * @return {Object<string, Array<number>}
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
283 */
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
284 function getRangePositions(range) {
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
285 // Merge any adjacent text nodes as it will be done by innerHTML
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
286 // which would cause positions to be off if not done
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
287 body.normalize();
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
288
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
289 return {
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
290 startPositions:
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
291 nodeToPositions(range.startContainer, range.startOffset),
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
292 endPositions:
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
293 nodeToPositions(range.endContainer, range.endOffset)
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
294 };
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
295 }
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
296
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
297 /**
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
298 * Sets the range start/end based on the positions object
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
299 * @param {Range} range
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
300 * @param {Object<string, Array<number>>} positions
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
301 */
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
302 function setRangePositions(range, positions) {
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
303 try {
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
304 var startPositions = positions.startPositions;
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
305 var endPositions = positions.endPositions;
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
306
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
307 range.setStart(positionsToNode(body, startPositions),
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
308 startPositions[0]);
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
309 range.setEnd(positionsToNode(body, endPositions),
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
310 endPositions[0]);
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
311 } catch (e) {
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
312 if (console && console.warn) {
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
313 console.warn('[SCEditor] Undo plugin lost caret', e);
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
314 }
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
315 }
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
316 }
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
317
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
318 /**
4c4fc447baea start with sceditor-3.1.1
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
319 * Converts the passed container and offset into positions array
4c4fc447baea start with sceditor-3.1.1
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320 * @param {Node} container
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321 * @param {number} offset
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322 * @returns {Array<number>}
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323 */
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324 function nodeToPositions(container, offset) {
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325 var positions = [offset];
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326 var node = container;
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327
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328 while (node && node.tagName !== 'BODY') {
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329 positions.push(nodeIndex(node));
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330 node = node.parentNode;
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331 }
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332
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333 return positions;
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334 }
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335
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336 /**
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337 * Returns index of passed node
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338 * @param {Node} node
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339 * @returns {number}
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340 */
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341 function nodeIndex(node) {
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342 var i = 0;
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343 while ((node = node.previousSibling)) {
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344 i++;
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345 }
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346 return i;
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347 }
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348
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349 /**
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350 * Gets the container node from the positions array
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351 * @param {Node} node
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352 * @param {Array<number>} positions
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353 * @returns {Node}
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354 */
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355 function positionsToNode(node, positions) {
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356 for (var i = positions.length - 1; node && i > 0; i--) {
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357 node = node.childNodes[positions[i]];
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358 }
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359 return node;
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360 }
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361 };
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362 }(sceditor));