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TiddlyWiki5/core/modules/widgets/view.js

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JavaScript
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/*\
title: $:/core/modules/widgets/view.js
type: application/javascript
module-type: widget
View widget
\*/
(function(){
/*jslint node: true, browser: true */
/*global $tw: false */
"use strict";
var Widget = require("$:/core/modules/widgets/widget.js").widget;
var ViewWidget = function(parseTreeNode,options) {
this.initialise(parseTreeNode,options);
};
/*
Inherit from the base widget class
*/
ViewWidget.prototype = new Widget();
/*
Render this widget into the DOM
*/
ViewWidget.prototype.render = function(parent,nextSibling) {
this.parentDomNode = parent;
this.computeAttributes();
this.execute();
if(this.text) {
var textNode = this.document.createTextNode(this.text);
parent.insertBefore(textNode,nextSibling);
this.domNodes.push(textNode);
} else {
this.makeChildWidgets();
this.renderChildren(parent,nextSibling);
}
};
/*
Compute the internal state of the widget
*/
ViewWidget.prototype.execute = function() {
// Get parameters from our attributes
this.viewTitle = this.getAttribute("tiddler",this.getVariable("currentTiddler"));
this.viewSubtiddler = this.getAttribute("subtiddler");
this.viewField = this.getAttribute("field","text");
this.viewIndex = this.getAttribute("index");
this.viewFormat = this.getAttribute("format","text");
this.viewTemplate = this.getAttribute("template","");
this.viewMode = this.getAttribute("mode","block");
switch(this.viewFormat) {
case "htmlwikified":
this.text = this.getValueAsHtmlWikified(this.viewMode);
break;
case "plainwikified":
this.text = this.getValueAsPlainWikified(this.viewMode);
break;
case "htmlencodedplainwikified":
this.text = this.getValueAsHtmlEncodedPlainWikified(this.viewMode);
break;
case "htmlencoded":
this.text = this.getValueAsHtmlEncoded();
break;
case "htmltextencoded":
this.text = this.getValueAsHtmlTextEncoded();
break;
case "urlencoded":
this.text = this.getValueAsUrlEncoded();
break;
case "doubleurlencoded":
this.text = this.getValueAsDoubleUrlEncoded();
break;
case "date":
this.text = this.getValueAsDate(this.viewTemplate);
break;
case "relativedate":
this.text = this.getValueAsRelativeDate();
break;
case "stripcomments":
this.text = this.getValueAsStrippedComments();
break;
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case "jsencoded":
this.text = this.getValueAsJsEncoded();
break;
default: // "text"
this.text = this.getValueAsText();
break;
}
};
/*
The various formatter functions are baked into this widget for the moment. Eventually they will be replaced by macro functions
*/
/*
Retrieve the value of the widget. Options are:
asString: Optionally return the value as a string
*/
ViewWidget.prototype.getValue = function(options) {
options = options || {};
var value = options.asString ? "" : undefined;
if(this.viewIndex) {
value = this.wiki.extractTiddlerDataItem(this.viewTitle,this.viewIndex);
} else {
var tiddler;
if(this.viewSubtiddler) {
tiddler = this.wiki.getSubTiddler(this.viewTitle,this.viewSubtiddler);
} else {
tiddler = this.wiki.getTiddler(this.viewTitle);
}
if(tiddler) {
if(this.viewField === "text" && !this.viewSubtiddler) {
// Calling getTiddlerText() triggers lazy loading of skinny tiddlers
value = this.wiki.getTiddlerText(this.viewTitle);
} else {
if($tw.utils.hop(tiddler.fields,this.viewField)) {
if(options.asString) {
value = tiddler.getFieldString(this.viewField);
} else {
value = tiddler.fields[this.viewField];
}
}
}
} else {
if(this.viewField === "title") {
value = this.viewTitle;
}
}
}
return value;
};
ViewWidget.prototype.getValueAsText = function() {
return this.getValue({asString: true});
};
ViewWidget.prototype.getValueAsHtmlWikified = function(mode) {
return this.wiki.renderText("text/html","text/vnd.tiddlywiki",this.getValueAsText(),{
parseAsInline: mode !== "block",
parentWidget: this
});
};
ViewWidget.prototype.getValueAsPlainWikified = function(mode) {
return this.wiki.renderText("text/plain","text/vnd.tiddlywiki",this.getValueAsText(),{
parseAsInline: mode !== "block",
parentWidget: this
});
};
ViewWidget.prototype.getValueAsHtmlEncodedPlainWikified = function(mode) {
return $tw.utils.htmlEncode(this.wiki.renderText("text/plain","text/vnd.tiddlywiki",this.getValueAsText(),{
parseAsInline: mode !== "block",
parentWidget: this
}));
};
ViewWidget.prototype.getValueAsHtmlEncoded = function() {
return $tw.utils.htmlEncode(this.getValueAsText());
};
ViewWidget.prototype.getValueAsHtmlTextEncoded = function() {
return $tw.utils.htmlTextEncode(this.getValueAsText());
};
ViewWidget.prototype.getValueAsUrlEncoded = function() {
return $tw.utils.encodeURIComponentExtended(this.getValueAsText());
};
ViewWidget.prototype.getValueAsDoubleUrlEncoded = function() {
return $tw.utils.encodeURIComponentExtended($tw.utils.encodeURIComponentExtended(this.getValueAsText()));
};
ViewWidget.prototype.getValueAsDate = function(format) {
format = format || "YYYY MM DD 0hh:0mm";
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var value = $tw.utils.parseDate(this.getValue());
if(value && $tw.utils.isDate(value) && value.toString() !== "Invalid Date") {
return $tw.utils.formatDateString(value,format);
} else {
return "";
}
};
ViewWidget.prototype.getValueAsRelativeDate = function(format) {
var value = $tw.utils.parseDate(this.getValue());
if(value && $tw.utils.isDate(value) && value.toString() !== "Invalid Date") {
return $tw.utils.getRelativeDate((new Date()) - (new Date(value))).description;
} else {
return "";
}
};
ViewWidget.prototype.getValueAsStrippedComments = function() {
var lines = this.getValueAsText().split("\n"),
out = [];
for(var line=0; line<lines.length; line++) {
var text = lines[line];
if(!/^\s*\/\/#/.test(text)) {
out.push(text);
}
}
return out.join("\n");
};
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ViewWidget.prototype.getValueAsJsEncoded = function() {
return $tw.utils.stringify(this.getValueAsText());
};
/*
Selectively refreshes the widget if needed. Returns true if the widget or any of its children needed re-rendering
*/
ViewWidget.prototype.refresh = function(changedTiddlers) {
var changedAttributes = this.computeAttributes();
if(changedAttributes.tiddler || changedAttributes.field || changedAttributes.index || changedAttributes.template || changedAttributes.format || changedTiddlers[this.viewTitle]) {
this.refreshSelf();
return true;
} else {
return false;
}
};
exports.view = ViewWidget;
})();