wikimedia/mediawiki-extensions-VisualEditor
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Very simple support for undo/redo (with keyboard only: ctrl+z/ctrl+y)

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This commit is contained in:
Inez Korczynski 2011-11-05 02:06:51 +00:00
parent e1b0126b03
commit 7b303e178b
1 changed files with 33 additions and 1 deletions
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34
modules/es/views/es.SurfaceView.js
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@ -151,6 +151,9 @@ es.SurfaceView.prototype.onMouseUp = function( e ) {
}
};
var transactionStack = [];
var undoCounter = 0;
es.SurfaceView.prototype.onKeyDown = function( e ) {
switch ( e.keyCode ) {
case 16: // Shift
@ -196,22 +199,50 @@ es.SurfaceView.prototype.onKeyDown = function( e ) {
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 @@ es.SurfaceView.prototype.insertFromInput = function() {
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();