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TiddlyWiki5/core/modules/startup/render.js
Jermolene 7c8c5cf745 Fix problem with parsing main UI boot tiddlers
We were parsing the boot tiddlers, making them into a widget and then
refreshing the widget tree. The problem is that subsequent chances to
the boot tiddlers themselves wouldn’t be picked up as part of the
refresh.

Now we indirectly parse those UI boot tiddlers through a transclusion,
which does get refreshed in the desired way.
2014-05-06 10:14:22 +01:00

97 lines
3.4 KiB
JavaScript

/*\
title: $:/core/modules/startup/render.js
type: application/javascript
module-type: startup
Title, stylesheet and page rendering
\*/
(function(){
/*jslint node: true, browser: true */
/*global $tw: false */
"use strict";
// Export name and synchronous status
exports.name = "render";
exports.platforms = ["browser"];
exports.after = ["story"];
exports.synchronous = true;
// Default story and history lists
var PAGE_TITLE_TITLE = "$:/core/wiki/title"
var PAGE_STYLESHEET_TITLE = "$:/core/ui/PageStylesheet";
var PAGE_TEMPLATE_TITLE = "$:/core/ui/PageMacros";
// Time (in ms) that we defer refreshing changes to draft tiddlers
var DRAFT_TIDDLER_TIMEOUT = 400;
exports.startup = function() {
// Set up the title
$tw.titleWidgetNode = $tw.wiki.makeTranscludeWidget(PAGE_TITLE_TITLE,{document: $tw.fakeDocument, parseAsInline: true});
$tw.titleContainer = $tw.fakeDocument.createElement("div");
$tw.titleWidgetNode.render($tw.titleContainer,null);
document.title = $tw.titleContainer.textContent;
$tw.wiki.addEventListener("change",function(changes) {
if($tw.titleWidgetNode.refresh(changes,$tw.titleContainer,null)) {
document.title = $tw.titleContainer.textContent;
}
});
// Set up the styles
$tw.styleWidgetNode = $tw.wiki.makeTranscludeWidget(PAGE_STYLESHEET_TITLE,{document: $tw.fakeDocument});
$tw.styleContainer = $tw.fakeDocument.createElement("style");
$tw.styleWidgetNode.render($tw.styleContainer,null);
$tw.styleElement = document.createElement("style");
$tw.styleElement.innerHTML = $tw.styleContainer.textContent;
document.head.insertBefore($tw.styleElement,document.head.firstChild);
$tw.wiki.addEventListener("change",$tw.perf.report("styleRefresh",function(changes) {
if($tw.styleWidgetNode.refresh(changes,$tw.styleContainer,null)) {
$tw.styleElement.innerHTML = $tw.styleContainer.textContent;
}
}));
// Display the $:/core/ui/PageMacros tiddler to kick off the display
$tw.perf.report("mainRender",function() {
$tw.pageWidgetNode = $tw.wiki.makeTranscludeWidget(PAGE_TEMPLATE_TITLE,{document: document, parentWidget: $tw.rootWidget});
$tw.pageContainer = document.createElement("div");
$tw.utils.addClass($tw.pageContainer,"tw-page-container-wrapper");
document.body.insertBefore($tw.pageContainer,document.body.firstChild);
$tw.pageWidgetNode.render($tw.pageContainer,null);
})();
// Prepare refresh mechanism
var deferredChanges = Object.create(null),
timerId;
function refresh() {
// Process the refresh
$tw.pageWidgetNode.refresh(deferredChanges,$tw.pageContainer,null);
deferredChanges = Object.create(null);
}
// Add the change event handler
$tw.wiki.addEventListener("change",$tw.perf.report("mainRefresh",function(changes) {
// Check if only drafts have changed
var onlyDraftsHaveChanged = true;
for(var title in changes) {
var tiddler = $tw.wiki.getTiddler(title);
if(!tiddler || !tiddler.hasField("draft.of")) {
onlyDraftsHaveChanged = false;
}
}
// Defer the change if only drafts have changed
if(timerId) {
clearTimeout(timerId);
}
timerId = null;
if(onlyDraftsHaveChanged) {
timerId = setTimeout(refresh,DRAFT_TIDDLER_TIMEOUT);
$tw.utils.extend(deferredChanges,changes);
} else {
$tw.utils.extend(deferredChanges,changes);
refresh();
}
}));
// Fix up the link between the root widget and the page container
$tw.rootWidget.domNodes = [$tw.pageContainer];
$tw.rootWidget.children = [$tw.pageWidgetNode];
};
})();