mirror of
https://github.com/Jermolene/TiddlyWiki5
synced 2024-11-24 10:37:20 +00:00
76 lines
2.4 KiB
JavaScript
76 lines
2.4 KiB
JavaScript
/*\
|
|
title: $:/core/modules/utils/styles.js
|
|
type: application/javascript
|
|
module-type: utils
|
|
|
|
The stylesheet manager automatically renders any tiddlers tagged "$:/tags/stylesheet" as HTML style elements.
|
|
|
|
\*/
|
|
(function(){
|
|
|
|
/*jslint node: true, browser: true */
|
|
/*global $tw: false */
|
|
"use strict";
|
|
|
|
var STYLESHEET_ID_PREFIX = "tw-tiddler-stylesheet-",
|
|
STYLESHEET_TAG = "$:/tags/stylesheet";
|
|
|
|
function StylesheetManager(wiki) {
|
|
this.wiki = wiki;
|
|
this.stylesheets = {}; // Hashmap of currently rendered stylesheets
|
|
// Apply initial stylesheets
|
|
var self = this,
|
|
stylesheetTiddlers = this.wiki.filterTiddlers("[is[shadow]!has[draft.of]tag[" + STYLESHEET_TAG + "]] [!is[shadow]!has[draft.of]tag[" + STYLESHEET_TAG + "]]");
|
|
$tw.utils.each(stylesheetTiddlers,function(title,index) {
|
|
self.addStylesheet(title);
|
|
});
|
|
// Listen out for changes
|
|
this.wiki.addEventListener("change",function(changes) {
|
|
self.handleTiddlerChanges(changes);
|
|
});
|
|
}
|
|
|
|
StylesheetManager.prototype.addStylesheet = function(title) {
|
|
// Record the stylesheet in the hashmap
|
|
this.stylesheets[title] = true;
|
|
// Parse the tiddler and render as plain text
|
|
var text = this.wiki.new_renderTiddler("text/plain",title);
|
|
// Create a style element and put it in the document
|
|
var styleNode = document.createElement("style");
|
|
styleNode.setAttribute("type","text/css");
|
|
styleNode.setAttribute("id",STYLESHEET_ID_PREFIX + title);
|
|
styleNode.appendChild(document.createTextNode(text));
|
|
document.getElementsByTagName("head")[0].appendChild(styleNode);
|
|
};
|
|
|
|
StylesheetManager.prototype.removeStylesheet = function(title) {
|
|
// Remove the stylesheet from the hashmap
|
|
if($tw.utils.hop(this.stylesheets,title)) {
|
|
delete this.stylesheets[title];
|
|
}
|
|
// Remove the stylesheet from the document
|
|
var styleNode = document.getElementById(STYLESHEET_ID_PREFIX + title);
|
|
if(styleNode) {
|
|
styleNode.parentNode.removeChild(styleNode);
|
|
}
|
|
};
|
|
|
|
StylesheetManager.prototype.handleTiddlerChanges = function(changes) {
|
|
var self = this;
|
|
$tw.utils.each(changes,function(change,title) {
|
|
// Remove any existing stylesheet for the changed tiddler
|
|
if($tw.utils.hop(self.stylesheets,title)) {
|
|
self.removeStylesheet(title);
|
|
}
|
|
// Add the stylesheet if it is tagged and not a draft
|
|
var tiddler = self.wiki.getTiddler(title);
|
|
if(tiddler && tiddler.hasTag(STYLESHEET_TAG) && !tiddler.hasField("draft.of")) {
|
|
self.addStylesheet(title);
|
|
}
|
|
});
|
|
};
|
|
|
|
exports.StylesheetManager = StylesheetManager;
|
|
|
|
})();
|