mirror of
https://github.com/Jermolene/TiddlyWiki5
synced 2024-06-21 04:49:54 +00:00
3ee5f10362
If a tiddler is only a shadow tiddler, then do not save it to local storage. Otherwise when installing a plugin, each individual tiddler will be expanded and saved individually. In order to uninstall such a plugin, the plugin tiddler and each tiddler needs to be deleted. This can be prevented by including a run like `-[is[shadow]!is[tiddler]]` in the save filter, but that has the side effect of preventing overwritten shadow tiddlers from being deleted from local storage.
114 lines
4.0 KiB
JavaScript
114 lines
4.0 KiB
JavaScript
/*\
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title: $:/plugins/tiddlywiki/browser-storage/util.js
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type: application/javascript
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module-type: library
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Utility methods for browser-storage plugin
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\*/
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(function(){
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/*jslint node: true, browser: true */
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/*global $tw: false */
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"use strict";
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function BrowserStorageUtil(wiki,options) {
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this.options = options || {};
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this.wiki = wiki;
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this.cachedTiddlers = [];
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this.QUOTA_EXCEEDED_ALERT_TITLE = "$:/config/BrowserStorage/QuotaExceededAlert";
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this.DEFAULT_QUOTA_EXCEEDED_ALERT_PREFIX = "Quota exceeded attempting to store `";
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this.DEFAULT_QUOTA_EXCEEDED_ALERT_SUFFIX = "` in browser local storage";
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}
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BrowserStorageUtil.prototype.isEnabled = function() {
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return $tw.wiki.getTiddlerText(this.options.enabledTitle) === "yes";
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};
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BrowserStorageUtil.prototype.cachePreloadTiddlers = function() {
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var self = this;
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$tw.utils.each($tw.boot.preloadDirty, function(item){
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var tiddler = $tw.wiki.getTiddler(item);
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self.cachedTiddlers.push(tiddler);
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});
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};
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BrowserStorageUtil.prototype.addCachedTiddlers = function() {
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var self = this;
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if(this.cachedTiddlers.length > 0) {
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$tw.utils.each(this.cachedTiddlers, function(item){
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$tw.wiki.addTiddler(item);
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});
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this.cachedTiddlers.length = 0;
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}
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};
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BrowserStorageUtil.prototype.removeTiddlerFromLocalStorage = function(title) {
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console.log("browser-storage: Removing", title);
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window.localStorage.removeItem(this.options.prefix + title);
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};
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BrowserStorageUtil.prototype.saveTiddlerToLocalStorage = function(title) {
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// Get the tiddler
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var tiddler = $tw.wiki.getTiddler(title);
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if(tiddler) {
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if (this.wiki.tiddlerExists(title)) {
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// This is not a shadow tiddler
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console.log("browser-storage: Saving",title);
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// Get the JSON of the tiddler
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var json = JSON.stringify(tiddler.getFieldStrings());
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// Try to save it to local storage
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try {
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window.localStorage.setItem(this.options.prefix + title,json);
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} catch(e) {
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if(e.name === "QuotaExceededError") {
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// Complain if we failed
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var msg = $tw.wiki.getTiddlerText(this.QUOTA_EXCEEDED_ALERT_TITLE,this.DEFAULT_QUOTA_EXCEEDED_ALERT_PREFIX + title + this.DEFAULT_QUOTA_EXCEEDED_ALERT_SUFFIX);
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if(this.options.logger) {
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this.options.logger.alert(msg);
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}
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// No point in keeping old values around for this tiddler
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window.localStorage.removeItem(this.options.prefix + title);
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} else {
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console.log("Browser-storage error:",e);
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}
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}
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} else {
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// Shadow tiddler which is no longer overwritten (or never was)
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// Ensure it is not in local storage
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this.removeTiddlerFromLocalStorage(title);
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}
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} else {
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// In local storage, use the special value of empty string to mark the tiddler as deleted
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// On future page loads, if the tiddler is already gone from startup then the blank entry
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// will be removed from localstorage. Otherwise, the tiddler will be deleted.
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console.log("browser-storage: Blanking",title);
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try {
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window.localStorage.setItem(this.options.prefix + title, "");
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} catch(e) {
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console.log("Browser-storage error:",e);
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}
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}
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};
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BrowserStorageUtil.prototype.clearLocalStorage = function() {
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var url = window.location.pathname,
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log = [];
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// Step through each browser storage item
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if(window.localStorage) {
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for(var index=window.localStorage.length - 1; index>=0; index--) {
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var key = window.localStorage.key(index),
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parts = key.split("#");
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// Delete it if it is ours
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if(parts[0] === "tw5" && parts[1] === url) {
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window.localStorage.removeItem(key);
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}
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}
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}
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};
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exports.BrowserStorageUtil = BrowserStorageUtil;
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})();
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