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TiddlyWiki5/plugins/tiddlywiki/browser-storage/rawmarkup.js

78 lines
2.2 KiB
JavaScript

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