silverstripe-cms/javascript/ImageEditor/ImageHistory.js

88 lines
2.8 KiB
JavaScript
Raw Normal View History

/**
* @author Mateusz
*/
ImageHistory = {
initialize: function() {
this.history = new Array();
this.historyPointer = -1;
this.modifiedOriginalImage = false;
this.undo = ImageHistory.undo.bind(this);
this.redo = ImageHistory.redo.bind(this);
this.add = ImageHistory.add.bind(this);
this.addLinsteners = ImageHistory.addLinsteners.bind(this);
this.addLinsteners();
this.operationMade = ImageHistory.operationMade.bind(this);
this.onFakeImageLoad = ImageHistory.onFakeImageLoad.bind(this);
this.enable = ImageHistory.enable.bind(this);
this.disable = ImageHistory.disable.bind(this);
},
undo: function() {
if(this.historyPointer >= 1) {
image = $('image');
fakeImage = $('fakeImg');
operation = this.history[this.historyPointer].operation;
if(operation == 'rotate' || operation == 'crop') {
if(this.operationMade(this.historyPointer-1,'rotate') || this.operationMade(this.historyPointer-1,'crop'))
this.modifiedOriginalImage = true; else this.modifiedOriginalImage = false;
}
image.src = this.history[this.historyPointer-1].fileUrl;
fakeImage.src = this.history[this.historyPointer-1].fileUrl;
Event.observe('fakeImg','load',this.onFakeImageLoad);
this.historyPointer--;
} else {
alert("No more undo");
}
},
redo: function() {
if(this.historyPointer < this.history.length-1) {
operation = this.history[this.historyPointer+1].operation;
if(operation == 'rotate' || operation == 'crop') this.modifiedOriginalImage = true;
$('image').src = this.history[this.historyPointer+1].fileUrl;
$('fakeImg').src = $('image').src;
Event.observe('fakeImg','load',this.onFakeImageLoad);
this.historyPointer++;
} else {
alert("No more redo");
}
},
add: function(operation,url) {
this.historyPointer++;
this.history[this.historyPointer] = {'operation': operation,'fileUrl' : url};
if(operation == 'rotate' || operation == 'crop') this.modifiedOriginalImage = true;
},
addLinsteners: function() {
this.undoListener = Event.observe('undoButton','click',this.undo);
this.redoListener = Event.observe('redoButton','click',this.redo);
},
operationMade: function(historyPointer,operation) {
for(i=historyPointer;i>=0;i--) {
if(this.history[i].operation == operation) {
return true;
}
}
return false;
},
onFakeImageLoad: function() {
$('imageContainer').style.width = fakeImage.width + 'px';
$('imageContainer').style.height = fakeImage.height + 'px';
resize.imageContainerResize.originalWidth = fakeImage.width;
resize.imageContainerResize.originalHeight = fakeImage.height;
resize.imageContainerResize.placeClickBox();
},
enable: function() {
this.addLinsteners();
},
disable: function() {
Event.stopObserving($('undoButton'),'click', this.undo);
Event.stopObserving($('redoButton'),'click', this.redo);
},
};