From 0a2a5184c48345dd1d51bd8d81181da1f90c57bb Mon Sep 17 00:00:00 2001
From: Jermolene <jeremy@osmosoft.com>
Date: Thu, 6 Nov 2014 18:23:48 +0000
Subject: [PATCH] Add action-deletetiddler widget

---
 core/modules/widgets/action-deletetiddler.js  | 65 +++++++++++++++++++
 .../tiddlers/ActionDeleteTiddlerWidget.tid    | 33 ++++++++++
 .../prerelease/tiddlers/Release 5.1.5.tid     |  2 +-
 3 files changed, 99 insertions(+), 1 deletion(-)
 create mode 100644 core/modules/widgets/action-deletetiddler.js
 create mode 100644 editions/prerelease/tiddlers/ActionDeleteTiddlerWidget.tid

diff --git a/core/modules/widgets/action-deletetiddler.js b/core/modules/widgets/action-deletetiddler.js
new file mode 100644
index 000000000..61186d638
--- /dev/null
+++ b/core/modules/widgets/action-deletetiddler.js
@@ -0,0 +1,65 @@
+/*\
+title: $:/core/modules/widgets/action-deletetiddler.js
+type: application/javascript
+module-type: widget
+
+Action widget to delete a tiddler.
+
+\*/
+(function(){
+
+/*jslint node: true, browser: true */
+/*global $tw: false */
+"use strict";
+
+var Widget = require("$:/core/modules/widgets/widget.js").widget;
+
+var DeleteTiddlerWidget = function(parseTreeNode,options) {
+	this.initialise(parseTreeNode,options);
+};
+
+/*
+Inherit from the base widget class
+*/
+DeleteTiddlerWidget.prototype = new Widget();
+
+/*
+Render this widget into the DOM
+*/
+DeleteTiddlerWidget.prototype.render = function(parent,nextSibling) {
+	this.computeAttributes();
+	this.execute();
+};
+
+/*
+Compute the internal state of the widget
+*/
+DeleteTiddlerWidget.prototype.execute = function() {
+	this.actionTiddler = this.getAttribute("$tiddler",this.getVariable("currentTiddler"));
+	this.actionConfirm = this.getAttribute("$confirm");
+};
+
+/*
+Refresh the widget by ensuring our attributes are up to date
+*/
+DeleteTiddlerWidget.prototype.refresh = function(changedTiddlers) {
+	var changedAttributes = this.computeAttributes();
+	if(changedAttributes["$tiddler"] || changedAttributes["$confirm"]) {
+		this.refreshSelf();
+		return true;
+	}
+	return this.refreshChildren(changedTiddlers);
+};
+
+/*
+Invoke the action associated with this widget
+*/
+DeleteTiddlerWidget.prototype.invokeAction = function(triggeringWidget,event) {
+	
+	this.wiki.setText(this.actionTiddler,this.actionField,this.actionIndex,this.actionValue);
+	return true; // Action was invoked
+};
+
+exports["action-deletetiddler"] = DeleteTiddlerWidget;
+
+})();
diff --git a/editions/prerelease/tiddlers/ActionDeleteTiddlerWidget.tid b/editions/prerelease/tiddlers/ActionDeleteTiddlerWidget.tid
new file mode 100644
index 000000000..291050d98
--- /dev/null
+++ b/editions/prerelease/tiddlers/ActionDeleteTiddlerWidget.tid
@@ -0,0 +1,33 @@
+caption: action-deletetiddler
+created: 20141025120850184
+modified: 20141106173455527
+tags: Widgets ActionWidgets
+title: ActionDeleteTiddlerWidget
+type: text/vnd.tiddlywiki
+
+! Introduction
+
+The ''action-deletetiddler'' widget is an [[action widget|ActionWidgets]] that deletes a tiddler. ActionWidgets are used within triggering widgets such as the ButtonWidget.
+
+There are several differences compared to the [[WidgetMessage: tm-delete-tiddler]]:
+
+* The user is not prompted to confirm the deletion
+* No automatic updating of the story list
+* No special handling of draft tiddlers
+
+! Content and Attributes
+
+The ''action-deletetiddler'' widget is invisible. Any content within it is ignored.
+
+|!Attribute |!Description |
+|$tiddler |The title of the tiddler to be deleted (if not provided defaults to the [[WidgetVariable: currentTiddler]] |
+
+! Examples
+
+Here is an example of a button that deletes the tiddler HelloThere. Note:
+
+<$macrocall $name='wikitext-example-without-html'
+src='<$button>
+<$action-deletetiddler $tiddler="HelloThere"/>
+Go to Control Panel "Appearance" tab
+</$button>'/>
diff --git a/editions/prerelease/tiddlers/Release 5.1.5.tid b/editions/prerelease/tiddlers/Release 5.1.5.tid
index d22b95a3b..527b03b97 100644
--- a/editions/prerelease/tiddlers/Release 5.1.5.tid	
+++ b/editions/prerelease/tiddlers/Release 5.1.5.tid	
@@ -21,7 +21,7 @@ type: text/vnd.tiddlywiki
 
 !! Hackability Improvements
 
-* Introduced new ActionSetFieldWidget, ActionSetFieldsWidget and ActionDeleteFieldWidget for manipulating tiddler fields
+* Introduced new ActionSetFieldWidget, ActionSetFieldsWidget, ActionDeleteFieldWidget and ActionDeleteTiddlerWidget for manipulating tiddler fields and values
 * [[Enhanced|https://github.com/Jermolene/TiddlyWiki5/commit/4a172125768e3b33c30e725e8550454a9d26c5c4]] the EditTextWidget to allow more control over the sizing of textarea editors
 * [[Added|https://github.com/Jermolene/TiddlyWiki5/commit/13726ef73157d9e9d65ae4027d9c32aaa7cdcc90]] new canned filter for recently modified system tiddlers in [[$:/AdvancedSearch]]
 * [[Added|https://github.com/Jermolene/TiddlyWiki5/commit/c20c935faabbb63f679bc4720b52162c56b6af64]] new system image for videos: [[$:/core/images/video]]