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annotate media/js/tiny_mce/plugins/autosave/editor_plugin_src.js @ 201:bc958bc3c6eb

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Futzing with CSS side blocks
author Brian Neal <bgneal@gmail.com>
date Mon, 12 Apr 2010 02:56:31 +0000
parents 149c3567fec1
children 6ed2932901fa
rev   line source
bgneal@45 1 /**
bgneal@183 2 * editor_plugin_src.js
bgneal@45 3 *
bgneal@183 4 * Copyright 2009, Moxiecode Systems AB
bgneal@183 5 * Released under LGPL License.
bgneal@183 6 *
bgneal@183 7 * License: http://tinymce.moxiecode.com/license
bgneal@183 8 * Contributing: http://tinymce.moxiecode.com/contributing
bgneal@183 9 *
bgneal@183 10 * Adds auto-save capability to the TinyMCE text editor to rescue content
bgneal@183 11 * inadvertently lost. This plugin was originally developed by Speednet
bgneal@183 12 * and that project can be found here: http://code.google.com/p/tinyautosave/
bgneal@183 13 *
bgneal@183 14 * TECHNOLOGY DISCUSSION:
bgneal@183 15 *
bgneal@183 16 * The plugin attempts to use the most advanced features available in the current browser to save
bgneal@183 17 * as much content as possible. There are a total of four different methods used to autosave the
bgneal@183 18 * content. In order of preference, they are:
bgneal@183 19 *
bgneal@183 20 * 1. localStorage - A new feature of HTML 5, localStorage can store megabytes of data per domain
bgneal@183 21 * on the client computer. Data stored in the localStorage area has no expiration date, so we must
bgneal@183 22 * manage expiring the data ourselves. localStorage is fully supported by IE8, and it is supposed
bgneal@183 23 * to be working in Firefox 3 and Safari 3.2, but in reality is is flaky in those browsers. As
bgneal@183 24 * HTML 5 gets wider support, the AutoSave plugin will use it automatically. In Windows Vista/7,
bgneal@183 25 * localStorage is stored in the following folder:
bgneal@183 26 * C:\Users\[username]\AppData\Local\Microsoft\Internet Explorer\DOMStore\[tempFolder]
bgneal@183 27 *
bgneal@183 28 * 2. sessionStorage - A new feature of HTML 5, sessionStorage works similarly to localStorage,
bgneal@183 29 * except it is designed to expire after a certain amount of time. Because the specification
bgneal@183 30 * around expiration date/time is very loosely-described, it is preferrable to use locaStorage and
bgneal@183 31 * manage the expiration ourselves. sessionStorage has similar storage characteristics to
bgneal@183 32 * localStorage, although it seems to have better support by Firefox 3 at the moment. (That will
bgneal@183 33 * certainly change as Firefox continues getting better at HTML 5 adoption.)
bgneal@183 34 *
bgneal@183 35 * 3. UserData - A very under-exploited feature of Microsoft Internet Explorer, UserData is a
bgneal@183 36 * way to store up to 128K of data per "document", or up to 1MB of data per domain, on the client
bgneal@183 37 * computer. The feature is available for IE 5+, which makes it available for every version of IE
bgneal@183 38 * supported by TinyMCE. The content is persistent across browser restarts and expires on the
bgneal@183 39 * date/time specified, just like a cookie. However, the data is not cleared when the user clears
bgneal@183 40 * cookies on the browser, which makes it well-suited for rescuing autosaved content. UserData,
bgneal@183 41 * like other Microsoft IE browser technologies, is implemented as a behavior attached to a
bgneal@183 42 * specific DOM object, so in this case we attach the behavior to the same DOM element that the
bgneal@183 43 * TinyMCE editor instance is attached to.
bgneal@45 44 */
bgneal@45 45
bgneal@183 46 (function(tinymce) {
bgneal@183 47 // Setup constants to help the compressor to reduce script size
bgneal@183 48 var PLUGIN_NAME = 'autosave',
bgneal@183 49 RESTORE_DRAFT = 'restoredraft',
bgneal@183 50 TRUE = true,
bgneal@183 51 undefined,
bgneal@183 52 unloadHandlerAdded,
bgneal@183 53 Dispatcher = tinymce.util.Dispatcher;
bgneal@183 54
bgneal@183 55 /**
bgneal@183 56 * This plugin adds auto-save capability to the TinyMCE text editor to rescue content
bgneal@183 57 * inadvertently lost. By using localStorage.
bgneal@183 58 *
bgneal@183 59 * @class tinymce.plugins.AutoSave
bgneal@183 60 */
bgneal@183 61 tinymce.create('tinymce.plugins.AutoSave', {
bgneal@183 62 /**
bgneal@183 63 * Initializes the plugin, this will be executed after the plugin has been created.
bgneal@183 64 * This call is done before the editor instance has finished it's initialization so use the onInit event
bgneal@183 65 * of the editor instance to intercept that event.
bgneal@183 66 *
bgneal@183 67 * @method init
bgneal@183 68 * @param {tinymce.Editor} ed Editor instance that the plugin is initialized in.
bgneal@183 69 * @param {string} url Absolute URL to where the plugin is located.
bgneal@183 70 */
bgneal@45 71 init : function(ed, url) {
bgneal@183 72 var self = this, settings = ed.settings;
bgneal@45 73
bgneal@183 74 self.editor = ed;
bgneal@45 75
bgneal@183 76 // Parses the specified time string into a milisecond number 10m, 10s etc.
bgneal@183 77 function parseTime(time) {
bgneal@183 78 var multipels = {
bgneal@183 79 s : 1000,
bgneal@183 80 m : 60000
bgneal@183 81 };
bgneal@183 82
bgneal@183 83 time = /^(\d+)([ms]?)$/.exec('' + time);
bgneal@183 84
bgneal@183 85 return (time[2] ? multipels[time[2]] : 1) * parseInt(time);
bgneal@183 86 };
bgneal@183 87
bgneal@183 88 // Default config
bgneal@183 89 tinymce.each({
bgneal@183 90 ask_before_unload : TRUE,
bgneal@183 91 interval : '30s',
bgneal@183 92 retention : '20m',
bgneal@183 93 minlength : 50
bgneal@183 94 }, function(value, key) {
bgneal@183 95 key = PLUGIN_NAME + '_' + key;
bgneal@183 96
bgneal@183 97 if (settings[key] === undefined)
bgneal@183 98 settings[key] = value;
bgneal@183 99 });
bgneal@183 100
bgneal@183 101 // Parse times
bgneal@183 102 settings.autosave_interval = parseTime(settings.autosave_interval);
bgneal@183 103 settings.autosave_retention = parseTime(settings.autosave_retention);
bgneal@183 104
bgneal@183 105 // Register restore button
bgneal@183 106 ed.addButton(RESTORE_DRAFT, {
bgneal@183 107 title : PLUGIN_NAME + ".restore_content",
bgneal@183 108 onclick : function() {
bgneal@183 109 if (ed.getContent().replace(/\s|&nbsp;|<\/?p[^>]*>|<br[^>]*>/gi, "").length > 0) {
bgneal@183 110 // Show confirm dialog if the editor isn't empty
bgneal@183 111 ed.windowManager.confirm(
bgneal@183 112 PLUGIN_NAME + ".warning_message",
bgneal@183 113 function(ok) {
bgneal@183 114 if (ok)
bgneal@183 115 self.restoreDraft();
bgneal@183 116 }
bgneal@183 117 );
bgneal@183 118 } else
bgneal@183 119 self.restoreDraft();
bgneal@183 120 }
bgneal@183 121 });
bgneal@183 122
bgneal@183 123 // Enable/disable restoredraft button depending on if there is a draft stored or not
bgneal@183 124 ed.onNodeChange.add(function() {
bgneal@183 125 var controlManager = ed.controlManager;
bgneal@183 126
bgneal@183 127 if (controlManager.get(RESTORE_DRAFT))
bgneal@183 128 controlManager.setDisabled(RESTORE_DRAFT, !self.hasDraft());
bgneal@183 129 });
bgneal@183 130
bgneal@183 131 ed.onInit.add(function() {
bgneal@183 132 // Check if the user added the restore button, then setup auto storage logic
bgneal@183 133 if (ed.controlManager.get(RESTORE_DRAFT)) {
bgneal@183 134 // Setup storage engine
bgneal@183 135 self.setupStorage(ed);
bgneal@183 136
bgneal@183 137 // Auto save contents each interval time
bgneal@183 138 setInterval(function() {
bgneal@183 139 self.storeDraft();
bgneal@183 140 ed.nodeChanged();
bgneal@183 141 }, settings.autosave_interval);
bgneal@183 142 }
bgneal@183 143 });
bgneal@183 144
bgneal@183 145 /**
bgneal@183 146 * This event gets fired when a draft is stored to local storage.
bgneal@183 147 *
bgneal@183 148 * @event onStoreDraft
bgneal@183 149 * @param {tinymce.plugins.AutoSave} sender Plugin instance sending the event.
bgneal@183 150 * @param {Object} draft Draft object containing the HTML contents of the editor.
bgneal@183 151 */
bgneal@183 152 self.onStoreDraft = new Dispatcher(self);
bgneal@183 153
bgneal@183 154 /**
bgneal@183 155 * This event gets fired when a draft is restored from local storage.
bgneal@183 156 *
bgneal@183 157 * @event onStoreDraft
bgneal@183 158 * @param {tinymce.plugins.AutoSave} sender Plugin instance sending the event.
bgneal@183 159 * @param {Object} draft Draft object containing the HTML contents of the editor.
bgneal@183 160 */
bgneal@183 161 self.onRestoreDraft = new Dispatcher(self);
bgneal@183 162
bgneal@183 163 /**
bgneal@183 164 * This event gets fired when a draft removed/expired.
bgneal@183 165 *
bgneal@183 166 * @event onRemoveDraft
bgneal@183 167 * @param {tinymce.plugins.AutoSave} sender Plugin instance sending the event.
bgneal@183 168 * @param {Object} draft Draft object containing the HTML contents of the editor.
bgneal@183 169 */
bgneal@183 170 self.onRemoveDraft = new Dispatcher(self);
bgneal@183 171
bgneal@183 172 // Add ask before unload dialog only add one unload handler
bgneal@183 173 if (!unloadHandlerAdded) {
bgneal@183 174 window.onbeforeunload = tinymce.plugins.AutoSave._beforeUnloadHandler;
bgneal@183 175 unloadHandlerAdded = TRUE;
bgneal@183 176 }
bgneal@45 177 },
bgneal@45 178
bgneal@183 179 /**
bgneal@183 180 * Returns information about the plugin as a name/value array.
bgneal@183 181 * The current keys are longname, author, authorurl, infourl and version.
bgneal@183 182 *
bgneal@183 183 * @method getInfo
bgneal@183 184 * @return {Object} Name/value array containing information about the plugin.
bgneal@183 185 */
bgneal@45 186 getInfo : function() {
bgneal@45 187 return {
bgneal@45 188 longname : 'Auto save',
bgneal@45 189 author : 'Moxiecode Systems AB',
bgneal@45 190 authorurl : 'http://tinymce.moxiecode.com',
bgneal@45 191 infourl : 'http://wiki.moxiecode.com/index.php/TinyMCE:Plugins/autosave',
bgneal@45 192 version : tinymce.majorVersion + "." + tinymce.minorVersion
bgneal@45 193 };
bgneal@45 194 },
bgneal@45 195
bgneal@183 196 /**
bgneal@183 197 * Returns an expiration date UTC string.
bgneal@183 198 *
bgneal@183 199 * @method getExpDate
bgneal@183 200 * @return {String} Expiration date UTC string.
bgneal@183 201 */
bgneal@183 202 getExpDate : function() {
bgneal@183 203 return new Date(
bgneal@183 204 new Date().getTime() + this.editor.settings.autosave_retention
bgneal@183 205 ).toUTCString();
bgneal@183 206 },
bgneal@45 207
bgneal@183 208 /**
bgneal@183 209 * This method will setup the storage engine. If the browser has support for it.
bgneal@183 210 *
bgneal@183 211 * @method setupStorage
bgneal@183 212 */
bgneal@183 213 setupStorage : function(ed) {
bgneal@183 214 var self = this, testKey = PLUGIN_NAME + '_test', testVal = "OK";
bgneal@183 215
bgneal@183 216 self.key = PLUGIN_NAME + ed.id;
bgneal@183 217
bgneal@183 218 // Loop though each storage engine type until we find one that works
bgneal@183 219 tinymce.each([
bgneal@183 220 function() {
bgneal@183 221 // Try HTML5 Local Storage
bgneal@183 222 if (localStorage) {
bgneal@183 223 localStorage.setItem(testKey, testVal);
bgneal@183 224
bgneal@183 225 if (localStorage.getItem(testKey) === testVal) {
bgneal@183 226 localStorage.removeItem(testKey);
bgneal@183 227
bgneal@183 228 return localStorage;
bgneal@183 229 }
bgneal@183 230 }
bgneal@183 231 },
bgneal@183 232
bgneal@183 233 function() {
bgneal@183 234 // Try HTML5 Session Storage
bgneal@183 235 if (sessionStorage) {
bgneal@183 236 sessionStorage.setItem(testKey, testVal);
bgneal@183 237
bgneal@183 238 if (sessionStorage.getItem(testKey) === testVal) {
bgneal@183 239 sessionStorage.removeItem(testKey);
bgneal@183 240
bgneal@183 241 return sessionStorage;
bgneal@183 242 }
bgneal@183 243 }
bgneal@183 244 },
bgneal@183 245
bgneal@183 246 function() {
bgneal@183 247 // Try IE userData
bgneal@183 248 if (tinymce.isIE) {
bgneal@183 249 ed.getElement().style.behavior = "url('#default#userData')";
bgneal@183 250
bgneal@183 251 // Fake localStorage on old IE
bgneal@183 252 return {
bgneal@183 253 autoExpires : TRUE,
bgneal@183 254
bgneal@183 255 setItem : function(key, value) {
bgneal@183 256 var userDataElement = ed.getElement();
bgneal@183 257
bgneal@183 258 userDataElement.setAttribute(key, value);
bgneal@183 259 userDataElement.expires = self.getExpDate();
bgneal@183 260 userDataElement.save("TinyMCE");
bgneal@183 261 },
bgneal@183 262
bgneal@183 263 getItem : function(key) {
bgneal@183 264 var userDataElement = ed.getElement();
bgneal@183 265
bgneal@183 266 userDataElement.load("TinyMCE");
bgneal@183 267
bgneal@183 268 return userDataElement.getAttribute(key);
bgneal@183 269 },
bgneal@183 270
bgneal@183 271 removeItem : function(key) {
bgneal@183 272 ed.getElement().removeAttribute(key);
bgneal@183 273 }
bgneal@183 274 };
bgneal@183 275 }
bgneal@183 276 },
bgneal@183 277 ], function(setup) {
bgneal@183 278 // Try executing each function to find a suitable storage engine
bgneal@183 279 try {
bgneal@183 280 self.storage = setup();
bgneal@183 281
bgneal@183 282 if (self.storage)
bgneal@183 283 return false;
bgneal@183 284 } catch (e) {
bgneal@183 285 // Ignore
bgneal@183 286 }
bgneal@183 287 });
bgneal@183 288 },
bgneal@183 289
bgneal@183 290 /**
bgneal@183 291 * This method will store the current contents in the the storage engine.
bgneal@183 292 *
bgneal@183 293 * @method storeDraft
bgneal@183 294 */
bgneal@183 295 storeDraft : function() {
bgneal@183 296 var self = this, storage = self.storage, editor = self.editor, expires, content;
bgneal@183 297
bgneal@183 298 // Is the contents dirty
bgneal@183 299 if (storage) {
bgneal@183 300 // If there is no existing key and the contents hasn't been changed since
bgneal@183 301 // it's original value then there is no point in saving a draft
bgneal@183 302 if (!storage.getItem(self.key) && !editor.isDirty())
bgneal@183 303 return;
bgneal@183 304
bgneal@183 305 // Store contents if the contents if longer than the minlength of characters
bgneal@183 306 content = editor.getContent();
bgneal@183 307 if (content.length > editor.settings.autosave_minlength) {
bgneal@183 308 expires = self.getExpDate();
bgneal@183 309
bgneal@183 310 // Store expiration date if needed IE userData has auto expire built in
bgneal@183 311 if (!self.storage.autoExpires)
bgneal@183 312 self.storage.setItem(self.key + "_expires", expires);
bgneal@183 313
bgneal@183 314 self.storage.setItem(self.key, content);
bgneal@183 315 self.onStoreDraft.dispatch(self, {
bgneal@183 316 expires : expires,
bgneal@183 317 content : content
bgneal@183 318 });
bgneal@183 319 }
bgneal@183 320 }
bgneal@183 321 },
bgneal@183 322
bgneal@183 323 /**
bgneal@183 324 * This method will restore the contents from the storage engine back to the editor.
bgneal@183 325 *
bgneal@183 326 * @method restoreDraft
bgneal@183 327 */
bgneal@183 328 restoreDraft : function() {
bgneal@183 329 var self = this, storage = self.storage;
bgneal@183 330
bgneal@183 331 if (storage) {
bgneal@183 332 content = storage.getItem(self.key);
bgneal@183 333
bgneal@183 334 if (content) {
bgneal@183 335 self.editor.setContent(content);
bgneal@183 336 self.onRestoreDraft.dispatch(self, {
bgneal@183 337 content : content
bgneal@183 338 });
bgneal@183 339 }
bgneal@183 340 }
bgneal@183 341 },
bgneal@183 342
bgneal@183 343 /**
bgneal@183 344 * This method will return true/false if there is a local storage draft available.
bgneal@183 345 *
bgneal@183 346 * @method hasDraft
bgneal@183 347 * @return {boolean} true/false state if there is a local draft.
bgneal@183 348 */
bgneal@183 349 hasDraft : function() {
bgneal@183 350 var self = this, storage = self.storage, expDate, exists;
bgneal@183 351
bgneal@183 352 if (storage) {
bgneal@183 353 // Does the item exist at all
bgneal@183 354 exists = !!storage.getItem(self.key);
bgneal@183 355 if (exists) {
bgneal@183 356 // Storage needs autoexpire
bgneal@183 357 if (!self.storage.autoExpires) {
bgneal@183 358 expDate = new Date(storage.getItem(self.key + "_expires"));
bgneal@183 359
bgneal@183 360 // Contents hasn't expired
bgneal@183 361 if (new Date().getTime() < expDate.getTime())
bgneal@183 362 return TRUE;
bgneal@183 363
bgneal@183 364 // Remove it if it has
bgneal@183 365 self.removeDraft();
bgneal@183 366 } else
bgneal@183 367 return TRUE;
bgneal@183 368 }
bgneal@183 369 }
bgneal@183 370
bgneal@183 371 return false;
bgneal@183 372 },
bgneal@183 373
bgneal@183 374 /**
bgneal@183 375 * Removes the currently stored draft.
bgneal@183 376 *
bgneal@183 377 * @method removeDraft
bgneal@183 378 */
bgneal@183 379 removeDraft : function() {
bgneal@183 380 var self = this, storage = self.storage, key = self.key, content;
bgneal@183 381
bgneal@183 382 if (storage) {
bgneal@183 383 // Get current contents and remove the existing draft
bgneal@183 384 content = storage.getItem(key);
bgneal@183 385 storage.removeItem(key);
bgneal@183 386 storage.removeItem(key + "_expires");
bgneal@183 387
bgneal@183 388 // Dispatch remove event if we had any contents
bgneal@183 389 if (content) {
bgneal@183 390 self.onRemoveDraft.dispatch(self, {
bgneal@183 391 content : content
bgneal@183 392 });
bgneal@183 393 }
bgneal@183 394 }
bgneal@183 395 },
bgneal@183 396
bgneal@183 397 "static" : {
bgneal@183 398 // Internal unload handler will be called before the page is unloaded
bgneal@183 399 _beforeUnloadHandler : function(e) {
bgneal@45 400 var msg;
bgneal@45 401
bgneal@45 402 tinymce.each(tinyMCE.editors, function(ed) {
bgneal@183 403 // Store a draft for each editor instance
bgneal@183 404 if (ed.plugins.autosave)
bgneal@183 405 ed.plugins.autosave.storeDraft();
bgneal@183 406
bgneal@183 407 // Never ask in fullscreen mode
bgneal@45 408 if (ed.getParam("fullscreen_is_enabled"))
bgneal@45 409 return;
bgneal@45 410
bgneal@183 411 // Setup a return message if the editor is dirty
bgneal@183 412 if (!msg && ed.isDirty() && ed.getParam("autosave_ask_before_unload"))
bgneal@45 413 msg = ed.getLang("autosave.unload_msg");
bgneal@45 414 });
bgneal@45 415
bgneal@45 416 return msg;
bgneal@45 417 }
bgneal@45 418 }
bgneal@45 419 });
bgneal@45 420
bgneal@183 421 tinymce.PluginManager.add('autosave', tinymce.plugins.AutoSave);
bgneal@183 422 })(tinymce);