95 lines
2.9 KiB
JavaScript
95 lines
2.9 KiB
JavaScript
/*\
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title: $:/plugins/tiddlywiki/browser-storage/rawmarkup.js
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type: application/javascript
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module-type: library
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Startup code injected as raw markup
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\*/
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(function() {
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// Need to initialise these because we run before bootprefix.js and boot.js
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$tw = window.$tw || Object.create(null);
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$tw.hooks = $tw.hooks || { names: {}};
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$tw.boot = $tw.boot || {};
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$tw.boot.preloadDirty = $tw.boot.preloadDirty || [];
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// Hook the point in the startup process when the tiddlers have been loaded but plugins not unpacked
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var hookName = "th-boot-tiddlers-loaded";
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if(Object.prototype.hasOwnProperty.call($tw.hooks.names,hookName)) {
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$tw.hooks.names[hookName].push(hookBootTiddlersLoaded);
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} else {
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$tw.hooks.names[hookName] = [hookBootTiddlersLoaded];
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}
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// Load tiddlers from browser storage
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function hookBootTiddlersLoaded() {
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var url = window.location.pathname,
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keysToDelete = [],
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log = [];
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// Check that browser storage is available
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try {
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window.localStorage;
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} catch(e) {
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return;
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}
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// Step through each browsder storage item
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for(var index=0; index<window.localStorage.length; index++) {
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var key = window.localStorage.key(index),
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parts = key.split("#");
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// If it's ours
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if(parts[0] === "tw5" && parts[1] === url) {
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// Read it as JSON
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var jsonString = window.localStorage.getItem(key),
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jsonData;
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if(jsonString) {
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try {
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jsonData = JSON.parse(jsonString);
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} catch(e) {}
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if(jsonData) {
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// Convert it to a tiddler
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var incomingTiddler = new $tw.Tiddler(jsonData);
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if(incomingTiddler) {
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// Get any existing tiddler
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var title = incomingTiddler.fields.title,
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existingTiddler = $tw.wiki.getTiddler(title);
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if(existingTiddler && existingTiddler.isEqual(incomingTiddler)) {
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// If the incoming tiddler is the same as the existing then we can delete the local storage version
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// Defer deletion until after this loop, since deleting will shift the index and cause the
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// index+1 item to be skipped.
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keysToDelete.push(key);
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} else {
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$tw.wiki.addTiddler(incomingTiddler);
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log.push(title);
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}
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}
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}
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} else {
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// Empty value means the tiddler is marked as deleted
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var title = parts.slice(2).join("#"),
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existingTiddler = $tw.wiki.getTiddler(title);
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if(existingTiddler) {
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// The tiddler still exists in the wiki. Delete it so it won't be visible.
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$tw.wiki.deleteTiddler(title);
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} else {
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// The tiddler is already missing from the wiki, so delete the blank local storage entry
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keysToDelete.push(key);
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}
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}
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}
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}
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$tw.utils.each(keysToDelete,function(key) {
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window.localStorage.removeItem(key);
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});
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// Make sure that all the tiddlers we've loaded are marked as dirty at startup
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Array.prototype.push.apply($tw.boot.preloadDirty,log);
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// Save the log
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$tw.wiki.addTiddler({
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title: "$:/temp/BrowserStorage/Log",
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text: $tw.utils.stringifyList(log)
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});
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}
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})();
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