https://www.mediawiki.org/wiki/Special:Code/MediaWiki/102082
Revision: 102082
Author: inez
Date: 2011-11-05 02:06:51 +0000 (Sat, 05 Nov 2011)
Log Message:
-----------
Very simple support for undo/redo (with keyboard only: ctrl+z/ctrl+y)
Modified Paths:
--------------
trunk/extensions/VisualEditor/modules/es/views/es.SurfaceView.js
Modified: trunk/extensions/VisualEditor/modules/es/views/es.SurfaceView.js
===================================================================
--- trunk/extensions/VisualEditor/modules/es/views/es.SurfaceView.js
2011-11-05 01:47:35 UTC (rev 102081)
+++ trunk/extensions/VisualEditor/modules/es/views/es.SurfaceView.js
2011-11-05 02:06:51 UTC (rev 102082)
@@ -151,6 +151,9 @@
}
};
+var transactionStack = [];
+var undoCounter = 0;
+
es.SurfaceView.prototype.onKeyDown = function( e ) {
switch ( e.keyCode ) {
case 16: // Shift
@@ -196,22 +199,50 @@
break;
case 8: // Backspace
var transaction =
this.documentView.model.prepareRemoval( new es.Range( this.selection.to,
this.selection.to - 1 ) );
+ transactionStack.push ( transaction );
+
this.documentView.model.commit ( transaction );
this.selection.from = this.selection.to -= 1;
this.showCursor();
break;
case 46: // Delete
var transaction =
this.documentView.model.prepareRemoval( new es.Range( this.selection.to,
this.selection.to + 1 ) );
+ transactionStack.push ( transaction );
this.documentView.model.commit ( transaction );
break;
+ case 89: // Y
+ if ( this.keyboard.keys.control ) {
+ if ( transactionStack.length > 0 && undoCounter
> 0) {
+ this.documentView.model.commit (
transactionStack[ transactionStack.length - undoCounter ] );
+ undoCounter--;
+ this.selection.from = this.selection.to
+= 1;
+ this.showCursor();
+ }
+ }
+ break;
+ case 90: // Z
+ if ( this.keyboard.keys.control ) {
+ if ( transactionStack.length > 0 ) {
+ this.documentView.model.rollback (
transactionStack[ transactionStack.length - 1 - undoCounter ] );
+ undoCounter++;
+ this.selection.from = this.selection.to
-= 1;
+ this.showCursor();
+ }
+ }
+ break;
default: // Insert content (maybe)
+ if (undoCounter) {
+ transactionStack = transactionStack.slice(0,
transactionStack.length - undoCounter);
+ undoCounter = 0;
+ }
+
if ( this.keyboard.keydownTimeout ) {
clearTimeout( this.keyboard.keydownTimeout );
}
var surface = this;
this.keyboard.keydownTimeout = setTimeout( function () {
surface.insertFromInput();
- }, 10 );
+ }, 0 );
break;
}
return true;
@@ -222,6 +253,7 @@
this.$input.val( '' );
if ( val.length > 0 ) {
var transaction = this.documentView.model.prepareInsertion(
this.selection.to, val.split('') );
+ transactionStack.push ( transaction );
this.documentView.model.commit ( transaction );
this.selection.from = this.selection.to += val.length;
this.showCursor();
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