299 lines
12 KiB
JavaScript
299 lines
12 KiB
JavaScript
/**
|
|
* @file ext-storage.js
|
|
*
|
|
* This extension allows automatic saving of the SVG canvas contents upon
|
|
* page unload (which can later be automatically retrieved upon future
|
|
* editor loads).
|
|
*
|
|
* The functionality was originally part of the SVG Editor, but moved to a
|
|
* separate extension to make the setting behavior optional, and adapted
|
|
* to inform the user of its setting of local data.
|
|
*
|
|
* @license MIT
|
|
*
|
|
* @copyright 2010 Brett Zamir
|
|
* @todo Revisit on whether to use `svgEditor.pref` over directly setting
|
|
* `curConfig` in all extensions for a more public API (not only for `extPath`
|
|
* and `imagePath`, but other currently used config in the extensions)
|
|
* @todo We might provide control of storage settings through the UI besides the
|
|
* initial (or URL-forced) dialog. *
|
|
*/
|
|
|
|
export default {
|
|
name: 'storage',
|
|
init ({$}) {
|
|
const svgEditor = this;
|
|
const svgCanvas = svgEditor.canvas;
|
|
|
|
// We could empty any already-set data for users when they decline storage,
|
|
// but it would be a risk for users who wanted to store but accidentally
|
|
// said "no"; instead, we'll let those who already set it, delete it themselves;
|
|
// to change, set the "emptyStorageOnDecline" config setting to true
|
|
// in svgedit-config-iife.js/svgedit-config-es.js.
|
|
const {
|
|
emptyStorageOnDecline,
|
|
// When the code in svg-editor.js prevents local storage on load per
|
|
// user request, we also prevent storing on unload here so as to
|
|
// avoid third-party sites making XSRF requests or providing links
|
|
// which would cause the user's local storage not to load and then
|
|
// upon page unload (such as the user closing the window), the storage
|
|
// would thereby be set with an empty value, erasing any of the
|
|
// user's prior work. To change this behavior so that no use of storage
|
|
// or adding of new storage takes place regardless of settings, set
|
|
// the "noStorageOnLoad" config setting to true in svgedit-config-*.js.
|
|
noStorageOnLoad,
|
|
forceStorage
|
|
} = svgEditor.curConfig;
|
|
const {storage, updateCanvas} = svgEditor;
|
|
|
|
/**
|
|
* Replace `storagePrompt` parameter within URL.
|
|
* @param {string} val
|
|
* @returns {void}
|
|
* @todo Replace the string manipulation with `searchParams.set`
|
|
*/
|
|
function replaceStoragePrompt (val) {
|
|
val = val ? 'storagePrompt=' + val : '';
|
|
const loc = top.location; // Allow this to work with the embedded editor as well
|
|
if (loc.href.includes('storagePrompt=')) {
|
|
/*
|
|
loc.href = loc.href.replace(/(?<sep>[&?])storagePrompt=[^&]*(?<amp>&?)/, function (n0, sep, amp) {
|
|
return (val ? sep : '') + val + (!val && amp ? sep : (amp || ''));
|
|
});
|
|
*/
|
|
loc.href = loc.href.replace(/([&?])storagePrompt=[^&]*(&?)/, function (n0, n1, amp) {
|
|
return (val ? n1 : '') + val + (!val && amp ? n1 : (amp || ''));
|
|
});
|
|
} else {
|
|
loc.href += (loc.href.includes('?') ? '&' : '?') + val;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Sets SVG content as a string with "svgedit-" and the current
|
|
* canvas name as namespace.
|
|
* @param {string} val
|
|
* @returns {void}
|
|
*/
|
|
function setSVGContentStorage (val) {
|
|
if (storage) {
|
|
const name = 'svgedit-' + svgEditor.curConfig.canvasName;
|
|
if (!val) {
|
|
storage.removeItem(name);
|
|
} else {
|
|
storage.setItem(name, val);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Set the cookie to expire.
|
|
* @param {string} cookie
|
|
* @returns {void}
|
|
*/
|
|
function expireCookie (cookie) {
|
|
document.cookie = encodeURIComponent(cookie) + '=; expires=Thu, 01 Jan 1970 00:00:00 GMT';
|
|
}
|
|
|
|
/**
|
|
* Expire the storage cookie.
|
|
* @returns {void}
|
|
*/
|
|
function removeStoragePrefCookie () {
|
|
expireCookie('svgeditstore');
|
|
}
|
|
|
|
/**
|
|
* Empties storage for each of the current preferences.
|
|
* @returns {void}
|
|
*/
|
|
function emptyStorage () {
|
|
setSVGContentStorage('');
|
|
Object.keys(svgEditor.curPrefs).forEach((name) => {
|
|
name = 'svg-edit-' + name;
|
|
if (storage) {
|
|
storage.removeItem(name);
|
|
}
|
|
expireCookie(name);
|
|
});
|
|
}
|
|
|
|
// emptyStorage();
|
|
|
|
/**
|
|
* Listen for unloading: If and only if opted in by the user, set the content
|
|
* document and preferences into storage:
|
|
* 1. Prevent save warnings (since we're automatically saving unsaved
|
|
* content into storage)
|
|
* 2. Use localStorage to set SVG contents (potentially too large to allow in cookies)
|
|
* 3. Use localStorage (where available) or cookies to set preferences.
|
|
* @returns {void}
|
|
*/
|
|
function setupBeforeUnloadListener () {
|
|
window.addEventListener('beforeunload', function (e) {
|
|
// Don't save anything unless the user opted in to storage
|
|
if (!document.cookie.match(/(?:^|;\s*)svgeditstore=(?:prefsAndContent|prefsOnly)/)) {
|
|
return;
|
|
}
|
|
if (document.cookie.match(/(?:^|;\s*)svgeditstore=prefsAndContent/)) {
|
|
setSVGContentStorage(svgCanvas.getSvgString());
|
|
}
|
|
|
|
svgEditor.setConfig({no_save_warning: true}); // No need for explicit saving at all once storage is on
|
|
// svgEditor.showSaveWarning = false;
|
|
|
|
const {curPrefs} = svgEditor;
|
|
|
|
Object.entries(curPrefs).forEach(([key, val]) => {
|
|
const store = (val !== undefined);
|
|
key = 'svg-edit-' + key;
|
|
if (!store) {
|
|
return;
|
|
}
|
|
if (storage) {
|
|
storage.setItem(key, val);
|
|
} else if (window.widget) {
|
|
window.widget.setPreferenceForKey(val, key);
|
|
} else {
|
|
val = encodeURIComponent(val);
|
|
document.cookie = encodeURIComponent(key) + '=' + val + '; expires=Fri, 31 Dec 9999 23:59:59 GMT';
|
|
}
|
|
});
|
|
});
|
|
}
|
|
|
|
let loaded = false;
|
|
return {
|
|
name: 'storage',
|
|
async langReady ({importLocale}) {
|
|
const storagePrompt = new URL(top.location).searchParams.get('storagePrompt');
|
|
|
|
const confirmSetStorage = await importLocale();
|
|
const {
|
|
message, storagePrefsAndContent, storagePrefsOnly,
|
|
storagePrefs, storageNoPrefsOrContent, storageNoPrefs,
|
|
rememberLabel, rememberTooltip
|
|
} = confirmSetStorage;
|
|
|
|
// No need to run this one-time dialog again just because the user
|
|
// changes the language
|
|
if (loaded) {
|
|
return;
|
|
}
|
|
loaded = true;
|
|
|
|
// Note that the following can load even if "noStorageOnLoad" is
|
|
// set to false; to avoid any chance of storage, avoid this
|
|
// extension! (and to avoid using any prior storage, set the
|
|
// config option "noStorageOnLoad" to true).
|
|
if (!forceStorage && (
|
|
// If the URL has been explicitly set to always prompt the
|
|
// user (e.g., so one can be pointed to a URL where one
|
|
// can alter one's settings, say to prevent future storage)...
|
|
storagePrompt === 'true' ||
|
|
(
|
|
// ...or...if the URL at least doesn't explicitly prevent a
|
|
// storage prompt (as we use for users who
|
|
// don't want to set cookies at all but who don't want
|
|
// continual prompts about it)...
|
|
storagePrompt !== 'false' &&
|
|
// ...and this user hasn't previously indicated a desire for storage
|
|
!document.cookie.match(/(?:^|;\s*)svgeditstore=(?:prefsAndContent|prefsOnly)/)
|
|
)
|
|
// ...then show the storage prompt.
|
|
)) {
|
|
const options = [];
|
|
if (storage) {
|
|
options.unshift(
|
|
{value: 'prefsAndContent', text: storagePrefsAndContent},
|
|
{value: 'prefsOnly', text: storagePrefsOnly},
|
|
{value: 'noPrefsOrContent', text: storageNoPrefsOrContent}
|
|
);
|
|
} else {
|
|
options.unshift(
|
|
{value: 'prefsOnly', text: storagePrefs},
|
|
{value: 'noPrefsOrContent', text: storageNoPrefs}
|
|
);
|
|
}
|
|
|
|
// Hack to temporarily provide a wide and high enough dialog
|
|
const oldContainerWidth = $('#dialog_container')[0].style.width,
|
|
oldContainerMarginLeft = $('#dialog_container')[0].style.marginLeft,
|
|
oldContentHeight = $('#dialog_content')[0].style.height,
|
|
oldContainerHeight = $('#dialog_container')[0].style.height;
|
|
$('#dialog_content')[0].style.height = '120px';
|
|
$('#dialog_container')[0].style.height = '170px';
|
|
$('#dialog_container')[0].style.width = '800px';
|
|
$('#dialog_container')[0].style.marginLeft = '-400px';
|
|
|
|
// Open select-with-checkbox dialog
|
|
// From svg-editor.js
|
|
svgEditor.storagePromptState = 'waiting';
|
|
const {response: pref, checked} = await $.select(
|
|
message,
|
|
options,
|
|
null,
|
|
null,
|
|
{
|
|
label: rememberLabel,
|
|
checked: true,
|
|
tooltip: rememberTooltip
|
|
}
|
|
);
|
|
if (pref && pref !== 'noPrefsOrContent') {
|
|
// Regardless of whether the user opted
|
|
// to remember the choice (and move to a URL which won't
|
|
// ask them again), we have to assume the user
|
|
// doesn't even want to remember their not wanting
|
|
// storage, so we don't set the cookie or continue on with
|
|
// setting storage on beforeunload
|
|
document.cookie = 'svgeditstore=' + encodeURIComponent(pref) + '; expires=Fri, 31 Dec 9999 23:59:59 GMT'; // 'prefsAndContent' | 'prefsOnly'
|
|
// If the URL was configured to always insist on a prompt, if
|
|
// the user does indicate a wish to store their info, we
|
|
// don't want ask them again upon page refresh so move
|
|
// them instead to a URL which does not always prompt
|
|
if (storagePrompt === 'true' && checked) {
|
|
replaceStoragePrompt();
|
|
return;
|
|
}
|
|
} else { // The user does not wish storage (or cancelled, which we treat equivalently)
|
|
removeStoragePrefCookie();
|
|
if (pref && // If the user explicitly expresses wish for no storage
|
|
emptyStorageOnDecline
|
|
) {
|
|
emptyStorage();
|
|
}
|
|
if (pref && checked) {
|
|
// Open a URL which won't set storage and won't prompt user about storage
|
|
replaceStoragePrompt('false');
|
|
return;
|
|
}
|
|
}
|
|
|
|
// Reset width/height of dialog (e.g., for use by Export)
|
|
$('#dialog_container')[0].style.width = oldContainerWidth;
|
|
$('#dialog_container')[0].style.marginLeft = oldContainerMarginLeft;
|
|
$('#dialog_content')[0].style.height = oldContentHeight;
|
|
$('#dialog_container')[0].style.height = oldContainerHeight;
|
|
|
|
// It should be enough to (conditionally) add to storage on
|
|
// beforeunload, but if we wished to update immediately,
|
|
// we might wish to try setting:
|
|
// svgEditor.setConfig({noStorageOnLoad: true});
|
|
// and then call:
|
|
// svgEditor.loadContentAndPrefs();
|
|
|
|
// We don't check for noStorageOnLoad here because
|
|
// the prompt gives the user the option to store data
|
|
setupBeforeUnloadListener();
|
|
|
|
svgEditor.storagePromptState = 'closed';
|
|
updateCanvas(true);
|
|
} else if (!noStorageOnLoad || forceStorage) {
|
|
setupBeforeUnloadListener();
|
|
}
|
|
}
|
|
};
|
|
}
|
|
};
|