8398c9048d
code was modified slightly, so the code differs from the original downloadable 1.9.5 version
100 lines
2.5 KiB
JavaScript
100 lines
2.5 KiB
JavaScript
dojo.provide("dojox.sketch.UndoStack");
|
|
dojo.require("dojox.xml.DomParser");
|
|
|
|
(function(){
|
|
var ta=dojox.sketch;
|
|
ta.CommandTypes={ Create:"Create", Move:"Move", Modify:"Modify", Delete:"Delete", Convert:"Convert"};
|
|
|
|
dojo.declare("dojox.sketch.UndoStack",null,{
|
|
constructor: function(figure){
|
|
this.figure=figure;
|
|
this._steps=[];
|
|
this._undoedSteps=[];
|
|
},
|
|
apply: function(state, from, to){
|
|
// the key here is to neutrally move from one state to another.
|
|
// we let the individual functions (i.e. undo and redo) actually
|
|
// determine the from and to; all we do here is implement it.
|
|
|
|
// check whether this is a fullText step
|
|
if(!from && !to && state.fullText){
|
|
this.figure.setValue(state.fullText);
|
|
return;
|
|
}
|
|
|
|
var fromText=from.shapeText;
|
|
var toText=to.shapeText;
|
|
|
|
if(fromText.length==0&&toText.length==0){
|
|
// nothing to reapply?
|
|
return;
|
|
}
|
|
if(fromText.length==0){
|
|
// We are creating.
|
|
var o=dojox.xml.DomParser.parse(toText).documentElement;
|
|
var a=this.figure._loadAnnotation(o);
|
|
if(a) this.figure._add(a);
|
|
return;
|
|
}
|
|
if(toText.length==0){
|
|
// we are deleting.
|
|
var ann=this.figure.get(from.shapeId);
|
|
this.figure._delete([ann],true);
|
|
return;
|
|
}
|
|
|
|
// we can simply reinit and draw from the shape itself,
|
|
// regardless of the actual command.
|
|
var nann=this.figure.get(to.shapeId);
|
|
var no=dojox.xml.DomParser.parse(toText).documentElement;
|
|
nann.draw(no);
|
|
this.figure.select(nann);
|
|
return;
|
|
},
|
|
// stack methods.
|
|
add: function(/*String*/cmd, /*ta.Annotation?*/ann, /*String?*/before){
|
|
var id=ann?ann.id:'';
|
|
//var bbox=ann?ann.getBBox():{};
|
|
var after=ann?ann.serialize():"";
|
|
if(cmd==ta.CommandTypes.Delete){ after=""; }
|
|
|
|
/*if(ann){
|
|
// fix the bbox x/y coords
|
|
var t=ann.transform;
|
|
bbox.x+=t.dx;
|
|
bbox.y+=t.dy;
|
|
}*/
|
|
var state={
|
|
cmdname:cmd,
|
|
//bbox:bbox,
|
|
// fullText:fullText,
|
|
before:{
|
|
shapeId: id,
|
|
shapeText:before||''
|
|
},
|
|
after:{
|
|
shapeId: id,
|
|
shapeText:after
|
|
}
|
|
};
|
|
//console.log('dojox.sketch history add',state);
|
|
this._steps.push(state);
|
|
this._undoedSteps = [];
|
|
},
|
|
destroy: function(){},
|
|
undo: function(){
|
|
var state=this._steps.pop();
|
|
if(state){
|
|
this._undoedSteps.push(state);
|
|
this.apply(state,state.after,state.before);
|
|
}
|
|
},
|
|
redo: function(){
|
|
var state=this._undoedSteps.pop();
|
|
if(state){
|
|
this._steps.push(state);
|
|
this.apply(state,state.before,state.after);
|
|
}
|
|
}
|
|
});
|
|
})();
|