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230 lines
8.3 KiB
230 lines
8.3 KiB
/*globals svgEditor, Editor, svgCanvas, $, widget*/ |
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/*jslint vars: true, eqeq: true, regexp: true, continue: true*/ |
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/* |
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* ext-storage.js |
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* |
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* Licensed under the MIT License |
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* |
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* Copyright(c) 2010 Brett Zamir |
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* |
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*/ |
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/** |
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* This extension allows automatic saving of the SVG canvas contents upon |
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* page unload and and automatic retrieval of the contents upon editor load. |
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* The functionality was originally part of the SVG Editor, but moved to a |
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* separate extension to make the behavior optional, and adapted to inform |
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* the user of its setting of local data. |
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*/ |
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/* |
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TODOS |
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1. Revisit on whether to use $.pref over directly setting curConfig in all |
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extensions for a more public API (not only for extPath and imagePath, |
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but other currently used config in the extensions) |
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*/ |
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svgEditor.addExtension('storage', function() { 'use strict'; |
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// We could empty any already-set data for them, but it |
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// would be a risk for users who wanted to store but accidentally |
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// said "no"; instead, we'll let those who already set it, delete it themselves; |
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// to change, change the following line to true. |
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var emptyStorageOnDecline = false; |
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function replaceStoragePrompt (val) { |
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val = val ? 'storagePrompt=' + val : ''; |
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if (window.location.href.indexOf('storagePrompt=') > -1) { |
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window.location.href = window.location.href.replace(/([&?])storagePrompt=[^&]*/, (val ? '$1' : '') + val); |
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} |
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else { |
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window.location.href += (window.location.href.indexOf('?') > -1 ? '&' : '?') + val; |
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} |
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} |
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function setSVGContentStorage (val) { |
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if (window.localStorage) { |
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var name = 'svgedit-' + svgEditor.curConfig.canvasName; |
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window.localStorage.setItem(name, val); |
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} |
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} |
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function emptyLocalStorage() { |
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document.cookie = 'store='; |
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setSVGContentStorage(''); |
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} |
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//emptyLocalStorage(); |
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/** |
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* Listen for unloading: If and only if opted in by the user, set the content |
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* document and preferences into storage: |
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* 1. Prevent save warnings (since we're automatically saving unsaved |
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* content into storage) |
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* 2. Use localStorage to set SVG contents (potentially too large to allow in cookies) |
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* 3. Use localStorage (where available) or cookies to set preferences. |
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*/ |
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function setupBeforeUnloadListener () { |
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window.addEventListener('beforeunload', function(e) { |
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// Don't save anything unless the user opted in to storage |
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if (!document.cookie.match(/store=(?:prefsAndContent|prefsOnly)/)) { |
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return; |
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} |
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var key; |
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setSVGContentStorage(svgCanvas.getSvgString()); |
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svgEditor.showSaveWarning = false; |
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var curConfig = svgEditor.curConfig; |
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for (key in curConfig) { |
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if (curConfig.hasOwnProperty(key)) { // It's our own config, so we don't need to iterate up the prototype chain |
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var d, |
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storage = svgEditor.storage, |
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val = curConfig[key], |
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store = (val != undefined); |
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key = 'svg-edit-' + key; |
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if (!store) { |
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continue; |
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} |
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if (storage) { |
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storage.setItem(key, val); |
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} |
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else if (window.widget) { |
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widget.setPreferenceForKey(val, key); |
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} |
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else { |
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d = new Date(); |
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d.setTime(d.getTime() + 31536000000); |
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val = encodeURIComponent(val); |
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document.cookie = key + '=' + val + '; expires=' + d.toUTCString(); |
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} |
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} |
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} |
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}, false); |
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} |
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var userStoragePref = 'noPrefsOrContent'; |
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/* |
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// We could add locales here instead (and also thereby avoid the need |
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// to keep our content within "langReady"), but this would be less |
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// convenient for translators. |
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$.extend(uiStrings, {confirmSetStorage: { |
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message: "By default and where supported, SVG-Edit can store your editor "+ |
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"preferences and SVG content locally on your machine so you do not "+ |
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"need to add these back each time you load SVG-Edit. If, for privacy "+ |
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"reasons, you do not wish to store this information on your machine, "+ |
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"you can change away from the default option below.", |
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storagePrefsAndContent: "Store preferences and SVG content locally", |
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storagePrefsOnly: "Only store preferences locally", |
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storagePrefs: "Store preferences locally", |
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storageNoPrefsOrContent: "Do not store my preferences or SVG content locally", |
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storageNoPrefs: "Do not store my preferences locally", |
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rememberLabel: "Remember this choice?", |
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rememberTooltip: "If you choose to opt out of storage while remembering this choice, the URL will change so as to avoid asking again." |
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}}); |
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*/ |
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return { |
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name: 'storage', |
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langReady: function (lang, uiStrings) { |
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var storagePrompt = $.deparam.querystring(true).storagePrompt; |
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if ( |
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// If explicitly set to always prompt (e.g., so a user can alter |
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// their settings)... |
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storagePrompt === true || |
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// ...or...the user hasn't visited page preventing storage prompt (for |
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// users who don't want to set cookies at all but don't want |
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// continual prompts)... |
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(storagePrompt !== false && |
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// ...and user hasn't already indicated a desire for storage |
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!document.cookie.match(/store=(?:prefsAndContent|prefsOnly)/) |
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) |
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// ...then show the storage prompt. |
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) { |
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var options = []; |
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if (window.localStorage) { |
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options.unshift( |
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{value: 'prefsAndContent', text: uiStrings.confirmSetStorage.storagePrefsAndContent}, |
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{value: 'prefsOnly', text: uiStrings.confirmSetStorage.storagePrefsOnly}, |
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{value: 'noPrefsOrContent', text: uiStrings.confirmSetStorage.storageNoPrefsOrContent} |
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); |
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} |
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else { |
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options.unshift( |
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{value: 'prefsOnly', text: uiStrings.confirmSetStorage.storagePrefs}, |
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{value: 'noPrefsOrContent', text: uiStrings.confirmSetStorage.storageNoPrefs} |
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); |
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} |
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// Hack to temporarily provide a wide and high enough dialog |
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var oldContainerWidth = $('#dialog_container')[0].style.width, |
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oldContainerMarginLeft = $('#dialog_container')[0].style.marginLeft, |
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oldContentHeight = $('#dialog_content')[0].style.height, |
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oldContainerHeight = $('#dialog_container')[0].style.height; |
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$('#dialog_content')[0].style.height = '120px'; |
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$('#dialog_container')[0].style.height = '170px'; |
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$('#dialog_container')[0].style.width = '800px'; |
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$('#dialog_container')[0].style.marginLeft = '-400px'; |
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// Open select-with-checkbox dialog |
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$.select( |
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uiStrings.confirmSetStorage.message, |
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options, |
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function (pref, checked) { |
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// If the URL was configured to always insist on a prompt, if |
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// the user does indicate a wish to store their info, we |
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// don't want ask them again upon page refresh so move |
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// them instead to a URL which does not always prompt |
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if (storagePrompt === true && pref && pref !== 'noPrefsOrContent') { |
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replaceStoragePrompt(); |
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return; |
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} |
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if (pref && pref !== 'noPrefsOrContent') { |
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// Regardless of whether the user opted |
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// to remember the choice (and move to a URL which won't |
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// ask them again), we have to assume the user |
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// doesn't even want to remember their not wanting |
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// storage, so we don't set the cookie or continue on with |
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// setting storage on beforeunload |
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document.cookie = 'store=' + pref; // 'prefsAndContent' | 'prefsOnly' |
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} |
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else { |
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if (emptyStorageOnDecline) { |
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emptyLocalStorage(); |
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} |
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if (checked) { |
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// Open a URL which won't set storage and won't prompt user about storage |
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replaceStoragePrompt('false'); |
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} |
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} |
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// Store the preference in memory (not currently in use) |
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userStoragePref = pref; |
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// Reset width/height of dialog (e.g., for use by Export) |
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$('#dialog_container')[0].style.width = oldContainerWidth; |
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$('#dialog_container')[0].style.marginLeft = oldContainerMarginLeft; |
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$('#dialog_content')[0].style.height = oldContentHeight; |
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$('#dialog_container')[0].style.height = oldContainerHeight; |
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// It should be enough to (conditionally) add to storage on |
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// beforeunload, but if we wished to update immediately, |
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// we might wish to try setting: |
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// Editor.preventStorageAccessOnLoad = true; |
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// and then call: |
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// Editor.loadContentAndPrefs(); |
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setupBeforeUnloadListener(); |
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Editor.storagePromptClosed = true; |
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}, |
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null, |
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null, |
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{ |
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label: uiStrings.confirmSetStorage.rememberLabel, |
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checked: false, |
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tooltip: uiStrings.confirmSetStorage.rememberTooltip |
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} |
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); |
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} |
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else { |
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setupBeforeUnloadListener(); |
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} |
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} |
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}; |
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});
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