mirror of
https://github.com/Jermolene/TiddlyWiki5
synced 2024-09-11 23:09:42 +00:00
6d24cedbcc
This arrangement takes better advantage of the similarities between the now deleted widget renderer and the element renderer. It also obviates the need for wrapper elements around every widget.
117 lines
3.4 KiB
JavaScript
117 lines
3.4 KiB
JavaScript
/*\
|
|
title: $:/core/modules/widgets/view.js
|
|
type: application/javascript
|
|
module-type: widget
|
|
|
|
The view widget displays a tiddler field.
|
|
|
|
\*/
|
|
(function(){
|
|
|
|
/*jslint node: true, browser: true */
|
|
/*global $tw: false */
|
|
"use strict";
|
|
|
|
/*
|
|
Define the "text" viewer here so that it is always available
|
|
*/
|
|
var TextViewer = function(viewWidget,tiddler,field,value) {
|
|
this.viewWidget = viewWidget;
|
|
this.tiddler = tiddler;
|
|
this.field = field;
|
|
this.value = value;
|
|
};
|
|
|
|
TextViewer.prototype.render = function() {
|
|
// Get the value as a string
|
|
if(this.field !== "text" && this.tiddler) {
|
|
this.value = this.tiddler.getFieldString(this.field);
|
|
}
|
|
var value = "";
|
|
if(this.value !== undefined && this.value !== null) {
|
|
value = this.value;
|
|
}
|
|
// Set the element details
|
|
this.viewWidget.tag = "span";
|
|
this.viewWidget.attributes = {};
|
|
this.viewWidget.children = this.viewWidget.renderer.renderTree.createRenderers(this.viewWidget.renderer.renderContext,[{
|
|
type: "text",
|
|
text: value
|
|
}]);
|
|
};
|
|
|
|
var ViewWidget = function(renderer) {
|
|
// Save state
|
|
this.renderer = renderer;
|
|
// Initialise the field viewers if they've not been done already
|
|
if(!this.fieldViewers) {
|
|
ViewWidget.prototype.fieldViewers = {text: TextViewer}; // Start with the built-in text viewer
|
|
$tw.modules.applyMethods("fieldviewer",this.fieldViewers);
|
|
}
|
|
// Generate child nodes
|
|
this.generate();
|
|
};
|
|
|
|
ViewWidget.prototype.generate = function() {
|
|
// Get parameters from our attributes
|
|
this.tiddlerTitle = this.renderer.getAttribute("tiddler",this.renderer.getContextTiddlerTitle());
|
|
this.fieldName = this.renderer.getAttribute("field","text");
|
|
this.format = this.renderer.getAttribute("format","text");
|
|
// Get the value to display
|
|
var tiddler = this.renderer.renderTree.wiki.getTiddler(this.tiddlerTitle),
|
|
value;
|
|
if(tiddler) {
|
|
if(this.fieldName === "text") {
|
|
// Calling getTiddlerText() triggers lazy loading of skinny tiddlers
|
|
value = this.renderer.renderTree.wiki.getTiddlerText(this.tiddlerTitle);
|
|
} else {
|
|
value = tiddler.fields[this.fieldName];
|
|
}
|
|
} else { // Use a special value if the tiddler is missing
|
|
switch(this.fieldName) {
|
|
case "title":
|
|
value = this.tiddlerTitle;
|
|
break;
|
|
case "modified":
|
|
case "created":
|
|
value = new Date();
|
|
break;
|
|
default:
|
|
value = "";
|
|
break;
|
|
}
|
|
}
|
|
// Choose the viewer to use
|
|
var Viewer = this.fieldViewers.text;
|
|
if($tw.utils.hop(this.fieldViewers,this.format)) {
|
|
Viewer = this.fieldViewers[this.format];
|
|
}
|
|
this.viewer = new Viewer(this,tiddler,this.fieldName,value);
|
|
// Ask the viewer to create the widget element
|
|
this.viewer.render();
|
|
};
|
|
|
|
ViewWidget.prototype.refreshInDom = function(changedAttributes,changedTiddlers) {
|
|
// Check if any of our attributes have changed, or if a tiddler we're interested in has changed
|
|
if(changedAttributes.tiddler || changedAttributes.field || changedAttributes.format || (this.tiddlerTitle && changedTiddlers[this.tiddlerTitle])) {
|
|
// Remove old child nodes
|
|
$tw.utils.removeChildren(this.parentElement);
|
|
// Regenerate and rerender the widget and replace the existing DOM node
|
|
this.generate();
|
|
var oldDomNode = this.renderer.domNode,
|
|
newDomNode = this.renderer.renderInDom();
|
|
oldDomNode.parentNode.replaceChild(newDomNode,oldDomNode);
|
|
} else {
|
|
// We don't need to refresh ourselves, so just refresh any child nodes
|
|
$tw.utils.each(this.children,function(node) {
|
|
if(node.refreshInDom) {
|
|
node.refreshInDom(changedTiddlers);
|
|
}
|
|
});
|
|
}
|
|
};
|
|
|
|
exports.view = ViewWidget;
|
|
|
|
})();
|