mirror of
https://github.com/Jermolene/TiddlyWiki5
synced 2024-06-30 01:03:16 +00:00
81 lines
2.2 KiB
JavaScript
81 lines
2.2 KiB
JavaScript
/*\
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title: $:/plugins/tiddlywiki/browser-storage/startup.js
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type: application/javascript
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module-type: startup
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Startup initialisation
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\*/
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(function(){
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/*jslint node: true, browser: true */
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/*global $tw: false */
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"use strict";
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// Export name and synchronous status
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exports.name = "browser-storage";
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exports.platforms = ["browser"];
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exports.after = ["load-modules"];
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exports.synchronous = true;
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var SAVE_FILTER_TITLE = "$:/config/BrowserStorage/SaveFilter"
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exports.startup = function() {
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var self = this;
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// Compute our prefix for local storage keys
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var url = window.location.protocol === "file:" ? window.location.pathname : "",
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prefix = "tw5#" + url + "#";
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// Make a logger
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var logger = new $tw.utils.Logger("browser-storage",{
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colour: "cyan"
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});
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// Function to compile the filter
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var filterFn,
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compileFilter = function() {
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filterFn = $tw.wiki.compileFilter($tw.wiki.getTiddlerText(SAVE_FILTER_TITLE));
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}
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compileFilter();
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// Track tiddler changes
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$tw.wiki.addEventListener("change",function(changes) {
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// Recompile the filter if it has changed
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if(changes[SAVE_FILTER_TITLE]) {
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compileFilter();
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}
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// Filter the changes
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var filteredChanges = filterFn.call($tw.wiki,function(iterator) {
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$tw.utils.each(changes,function(change,title) {
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var tiddler = $tw.wiki.getTiddler(title);
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iterator(tiddler,title);
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});
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});
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console.log("Filtered changes",filteredChanges)
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$tw.utils.each(filteredChanges,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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// 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(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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logger.alert("Quota exceeded trying to store '" + title + "' in browser local storage");
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// No point in keeping old values around for this tiddler
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window.localStorage.removeItem(prefix + title);
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} else {
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throw e;
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}
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}
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console.log("browser-storage: Saving",title);
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} else {
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window.localStorage.removeItem(prefix + title);
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console.log("browser-storage: Deleting",title);
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}
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});
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});
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};
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})();
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