362 lines
14 KiB
JavaScript
362 lines
14 KiB
JavaScript
/**
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* @author Mateusz
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*/
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ImageEditor.History = {
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initialize: function() {
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this.history = new Array();
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this.historyPointer = -1;
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this.isEnabled = true;
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this.image = ImageEditor.Positioning.addBehaviour($('image'));
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this.size = new Array();
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this.fakeImage = $('fakeImg');
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this.image = $('image');
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this.adjust = new Array();
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this.undo = ImageEditor.History.undo.bind(this);
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this.redo = ImageEditor.History.redo.bind(this);
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this.add = ImageEditor.History.add.bind(this);
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this.addListeners = ImageEditor.History.addListeners.bind(this);
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this.hasOperation = ImageEditor.History.hasOperation.bind(this);
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this.isInHistory = ImageEditor.History.isInHistory.bind(this);
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this.onImageLoad = ImageEditor.History.onImageLoad.bind(this);
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this.removeLastOperation = ImageEditor.History.removeLastOperation.bind(this);
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this.getOptimizedHistory = ImageEditor.History.getOptimizedHistory.bind(this);
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this.addCrop = ImageEditor.History.addCrop.bind(this);
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this.addResize = ImageEditor.History.addResize.bind(this);
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this.addEffect = ImageEditor.History.addEffect.bind(this);
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this.addAdjust = ImageEditor.History.addAdjust.bind(this);
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this.enable = ImageEditor.History.enable.bind(this);
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this.disable = ImageEditor.History.disable.bind(this);
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this.clear = ImageEditor.History.clear.bind(this);
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this.onlyResized = ImageEditor.History.onlyResized.bind(this);
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this.optimizeOtherEffects = ImageEditor.History.optimizeOtherEffects.bind(this);
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this.optimizeCrop = ImageEditor.History.optimizeCrop.bind(this);
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this.optimizeResize = ImageEditor.History.optimizeResize.bind(this);
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this.optimizeRotate = ImageEditor.History.optimizeRotate.bind(this);
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this.checkSpecialOperation = ImageEditor.History.checkSpecialOperation.bind(this);
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this.addListeners();
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},
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undo: function() {
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if(this.isEnabled) {
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if(this.historyPointer >= 1) {
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var operation = this.history[this.historyPointer].operation;
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this.checkSpecialOperation('undo',this.history[this.historyPointer]);
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Event.observe('image','load',this.onImageLoad);
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this.historyPointer = this.historyPointer - 1;
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this.image.src = this.history[this.historyPointer].fileUrl;
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} else {
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ImageEditor.statusMessageWrapper.statusMessage("No more undo","bad");
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}
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}
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},
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redo: function() {
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if(this.isEnabled) {
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if(this.historyPointer < this.history.length-1) {
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var operation = this.history[this.historyPointer+1].operation;
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this.checkSpecialOperation('redo',this.history[this.historyPointer+1]);
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Event.observe('image','load',this.onImageLoad);
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this.historyPointer = this.historyPointer + 1;
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this.image.src = this.history[this.historyPointer].fileUrl;
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} else {
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ImageEditor.statusMessageWrapper.statusMessage("No more redo","bad");
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}
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}
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},
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add: function(operation,url,additionalInfo) {
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var imageWidth = isNaN(parseInt($('image').style.width)) ? Element.getDimensions($('image')).width : parseInt($('image').style.width);//IE hack
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var imageHeight = isNaN(parseInt($('image').style.height)) ? Element.getDimensions($('image')).height : parseInt($('image').style.height);//IE hack
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//code above should be moved to Positioning.addBehaviour
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if(!this.isInHistory(operation,url)) {
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this.historyPointer++;
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this.size[this.historyPointer] = {'width': imageWidth,'height': imageHeight};
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this.history[this.historyPointer] = {'operation': operation,'fileUrl' : url,'additionalInfo': additionalInfo};
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this.size = this.size.slice(0,this.historyPointer+1);
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this.history = this.history.slice(0,this.historyPointer+1);
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}
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},
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addCrop: function(url,top,left,width,height) {
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this.add('crop',url,{
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'top':top,
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'left': left,
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'width': width,
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'height': height
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});
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},
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addResize: function(url,width,height) {
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this.add('resize',url,{
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'width': width,
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'height': height
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});
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},
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addEffect: function(url,name) {
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this.add(name,url);
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},
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addAdjust: function(name,value,url) {
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this.add(name,url,{'value': value});
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if(this.adjust[name] == undefined) {
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this.adjust[name] = {'pointer': 0,'values': Array()}
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this.adjust[name].values[0] = ImageEditor.effects.getEffect(name).getDefaultValue();
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}
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this.adjust[name].values[this.adjust[name].values.length] = value;
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this.adjust[name].pointer++;
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},
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addListeners: function() {
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this.undoListener = Event.observe('UndoButton','click',this.undo);
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this.redoListener = Event.observe('RedoButton','click',this.redo);
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},
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hasOperation: function(operation,historyPointer) {
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if(historyPointer == undefined) historyPointer = this.history.length-1;
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for(i=historyPointer;i>=0;i--) {
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if(this.history[i].operation == operation) {
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return true;
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}
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}
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return false;
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},
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getOptimizedHistory: function(without) {
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var history = this.history.slice(0,this.historyPointer+1);
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var result = {};
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var historyPointer = 1;
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result[0] = {fileUrl : history[0].fileUrl};
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var resize = this.optimizeResize(history,this.size);
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var rotate = this.optimizeRotate(history);
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var crop = this.optimizeCrop(history,this.size);
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var other = this.optimizeOtherEffects(history,without);
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if(rotate != undefined) {
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for(var i =0;i<rotate.length;i++) {
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result[historyPointer] = rotate[i];
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historyPointer++;
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}
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}
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if(resize != undefined){
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result[historyPointer] = resize;
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historyPointer++;
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}
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if(crop != undefined) {
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result[historyPointer] = crop;
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historyPointer++;
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}
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if(other != undefined) {
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for(var i =0;i<other.length;i++) {
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result[historyPointer] = other[i];
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historyPointer++;
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}
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}
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return result;
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},
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enable: function() {
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this.isEnabled = true;
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},
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disable: function() {
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this.isEnabled = false;
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},
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clear: function() {
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this.history = new Array();
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this.historyPointer = -1;
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this.size = new Array();
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},
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removeLastOperation: function() {
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this.history.pop();
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this.size.pop();
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this.historyPointer--;
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},
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isInHistory: function(operation,url) {
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if(operation == 'initialize' && this.historyPointer != -1) return true;
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for(var k=0;k<this.history.length;k++) {
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if(this.history[k].operation == operation && this.history[k].fileUrl == url) {
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return true;
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}
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}
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return false;
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},
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onImageLoad: function(event) {
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Event.stopObserving($('image'),'load',this.onImageLoad);
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this.image.style.width = this.size[this.historyPointer].width + 'px';
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this.image.style.height = this.size[this.historyPointer].height + 'px';
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$('imageContainer').style.width = this.size[this.historyPointer].width + 'px';
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$('imageContainer').style.height = this.size[this.historyPointer].height + 'px';
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ImageEditor.resize.imageContainerResize.originalWidth = this.size[this.historyPointer].width;
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ImageEditor.resize.imageContainerResize.originalHeight = this.size[this.historyPointer].height;
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ImageEditor.imageToResize.onImageLoad();
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},
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onlyResized: function() {
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for(i=this.historyPointer;i>=0;i--) {
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if(this.history[i].operation != 'resize') {
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return false;
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}
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}
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return true;
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},
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optimizeResize: function(history,size) {
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var scallingXFactor = 1;var scallingYFactor = 1;
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var initWidth = size[0].width;var initHeight = size[0].height;
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for(var i=0;i<history.length && i < (this.historyPointer+1);i++) {
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switch(history[i].operation) {
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case 'resize':
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if(i == 0) {
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var previousWidth = 0;
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var previousHeight = 0;
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} else {
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previousWidth = size[i-1].width;
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previousHeight = size[i-1].height;
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}
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if(i != 0) {
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scallingXFactor *= history[i].additionalInfo.width/previousWidth
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scallingYFactor *= history[i].additionalInfo.height/previousHeight;
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}
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break;
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case 'rotate':
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var tempX = scallingXFactor;
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scallingXFactor = scallingYFactor;
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scallingYFactor = tempX;
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var tempW = initWidth;
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initWidth = initHeight;
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initHeight = tempW;
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break;
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}
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}
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if(scallingXFactor != 1 || scallingYFactor != 1) return {'operation': 'resize','additionalInfo': {'width': initWidth*scallingXFactor,'height': initHeight*scallingYFactor}};
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},
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optimizeCrop: function(history,size) {
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var imageWidth = size[0].width;var imageHeight = size[0].height;
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var topCrop = 0;var leftCrop = 0;
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var scallingXFactor = 1;var scallingYFactor = 1;
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var crops = new Array();var cropNumber = 0;var resizeNumber = 0;
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var lastResizeNumber = 0;
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for(var i=0;i<history.length && i < (this.historyPointer+1);i++) {
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switch(history[i].operation) {
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case 'crop':
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crops[cropNumber] = {
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'width': history[i].additionalInfo.width, 'height': history[i].additionalInfo.height,
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'top': history[i].additionalInfo.top, 'left': history[i].additionalInfo.left,
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'parent': {'width': size[i-1].width,'height': size[i-1].height}
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};
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imageWidth = crops[cropNumber].width;
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imageHeight = crops[cropNumber].height;
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cropNumber++;
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scallingXFactor = 1;scallingYFactor = 1;
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break;
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case 'resize':
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if(crops.length != 0) {
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resizeNumber++;
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if(i == 0) {
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var previousWidth = 0;
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var previousHeight = 0;
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} else {
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previousWidth = size[i-1].width;
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previousHeight = size[i-1].height;
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}
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if(i != 0) {
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scallingXFactor = history[i].additionalInfo.width/previousWidth
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scallingYFactor = history[i].additionalInfo.height/previousHeight;
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}
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for(var k=0;k<crops.length;k++) {
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crops[k].top *= scallingYFactor;
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crops[k].left *= scallingXFactor;
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crops[k].parent.width *= scallingXFactor;
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crops[k].parent.height *= scallingYFactor;
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crops[k].width *= scallingXFactor;
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crops[k].height *= scallingYFactor;
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}
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crops[cropNumber-1].width = history[i].additionalInfo.width;
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crops[cropNumber-1].height = history[i].additionalInfo.height;
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}
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break;
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case 'rotate':
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if(crops.length != 0) {
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for(var k = 0;k<crops.length;k++) {
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var tempTop = crops[k].top;
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crops[k].top = crops[k].parent.width - crops[k].width - crops[k].left;
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crops[k].left = tempTop;
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tempWidth = crops[k].parent.width;
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crops[k].parent.width = crops[k].parent.height;
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crops[k].parent.height = tempWidth;
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var tempWidth = crops[k].width;
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crops[k].width = crops[k].height;
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crops[k].height = tempWidth;
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}
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}
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break;
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}
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}
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for(var l=0;l<crops.length;l++) {
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topCrop += crops[l].top;
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leftCrop += crops[l].left;
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}
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if(cropNumber == 0) return;
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if((topCrop + leftCrop + crops[cropNumber-1].width + crops[cropNumber-1].height) == 0) return;
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return {'operation': 'crop','additionalInfo': {'top': topCrop,'left': leftCrop,'width': crops[cropNumber-1].width,'height': crops[cropNumber-1].height}};
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},
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optimizeOtherEffects: function(history,without) {
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var result = Array();var effectsNumber = 0;var isInResult = false;
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for(var i=0;i<history.length;i++) {
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if(history[i].operation == 'resize' || history[i].operation == 'crop' || history[i].operation == 'rotate' || history[i].operation == without) continue;
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if(history[i].operation.indexOf('adjust') != -1) {
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isInResult = false;
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for(var k=0;k<result.length;k++) {
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if(result[k].operation == history[i].operation) {
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result[k] = history[i];
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isInResult = true;
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}
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}
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if(!isInResult) {
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result[effectsNumber] = history[i];
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effectsNumber++;
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}
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} else {
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result[effectsNumber] = history[i];
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effectsNumber++;
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}
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}
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return result;
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},
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optimizeRotate: function(history) {
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var result = Array();var rotateNumber = 0;var rotate;
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for(var i=0;i<history.length;i++) {
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if(history[i].operation.indexOf('rotate') != -1) {
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rotateNumber++;
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rotate = history[i];
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}
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}
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rotateNumber = rotateNumber % 4;
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for(var i=0;i<rotateNumber;i++) {
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result[result.length] = rotate;
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}
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return result.length == 0 ? undefined : result;
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},
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checkSpecialOperation: function(operationType,historyEntry) {
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if(this.adjust[historyEntry.operation] != undefined) {
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if(operationType == 'undo') {
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if(this.adjust[historyEntry.operation].pointer > 0) this.adjust[historyEntry.operation].pointer--;
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} else {
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this.adjust[historyEntry.operation].pointer++;
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}
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ImageEditor.effects.getEffect(historyEntry.operation).setValue(this.adjust[historyEntry.operation].values[this.adjust[historyEntry.operation].pointer]);
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}
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}
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}; |