croppic.js

/*
 * CROP
 * dependancy: jQuery
 * author: Ognjen "Zmaj Džedaj" Božičković
 */

(function (window, document) {

	Croppic = function (id, options) {

		var that = this;
		that.id = id;
		that.obj = $('#' + id);
		that.outputDiv = that.obj;

		// DEFAULT OPTIONS
		that.options = {
			uploadUrl:'',
			uploadData:{},
			cropUrl:'',
			cropData:{},
			outputUrlId:'',
			//styles
			imgEyecandy:true,
			imgEyecandyOpacity:0.2,
			zoomFactor:10,
			doubleZoomControls:true,
			modal:false,
			customUploadButtonId:'',
			loaderHtml:'',
			//callbacks
			onBeforeImgUpload: null,
			onAfterImgUpload: null,
			onImgDrag: null,
			onImgZoom: null,
			onBeforeImgCrop: null,
			onAfterImgCrop: null
		};

		// OVERWRITE DEFAULT OPTIONS
		for (i in options) that.options[i] = options[i];

		// INIT THE WHOLE DAMN THING!!!
		that.init();
		
	};

	Croppic.prototype = {
		id:'',
		imgInitW:0,
		imgInitH:0,
		imgW:0,
		imgH:0,
		objW:0,
		objH:0,
		windowW:0,
		windowH:$(window).height(),
		obj:{},
		outputDiv:{},
		outputUrlObj:{},
		img:{},
		defaultImg:{},
		croppedImg:{},
		imgEyecandy:{},
		form:{},
		cropControlsUpload:{},
		cropControlsCrop:{},
		cropControlZoomMuchIn:{},
		cropControlZoomMuchOut:{},
		cropControlZoomIn:{},
		cropControlZoomOut:{},
		cropControlCrop:{},
		cropControlReset:{},	
		cropControlRemoveCroppedImage:{},	
		modal:{},
		loader:{},
		
		init: function () {
			var that = this;
			
			that.objW = that.obj.width();
			that.objH = that.obj.height();
			
			if( $.isEmptyObject(that.defaultImg)){ that.defaultImg = that.obj.find('img'); }
			
			that.createImgUploadControls();
			that.bindImgUploadControl();
			
		},
		createImgUploadControls: function(){
			var that = this;
			
			var cropControlUpload = '';
			if(that.options.customUploadButtonId ===''){ cropControlUpload = '<i class="cropControlUpload"></i>'; }
			var cropControlRemoveCroppedImage = '<i class="cropControlRemoveCroppedImage"></i>';
			
			if( $.isEmptyObject(that.croppedImg)){ cropControlRemoveCroppedImage=''; }

			var html =    '<div class="cropControls cropControlsUpload"> ' + cropControlUpload + cropControlRemoveCroppedImage + ' </div>';
			that.outputDiv.append(html);
			
			that.cropControlsUpload = that.outputDiv.find('.cropControlsUpload');
			
			if(that.options.customUploadButtonId ===''){ that.imgUploadControl = that.outputDiv.find('.cropControlUpload'); }
			else{	that.imgUploadControl = $('#'+that.options.customUploadButtonId); that.imgUploadControl.show();	}

			if( !$.isEmptyObject(that.croppedImg)){
				that.cropControlRemoveCroppedImage = that.outputDiv.find('.cropControlRemoveCroppedImage');
			}
			
		},
		bindImgUploadControl: function(){
			
			var that = this;
			
			// CREATE UPLOAD IMG FORM
			var formHtml = '<form class="'+that.id+'_imgUploadForm" style="display: none; visibility: hidden;">  <input type="file" name="img">  </form>';
			that.outputDiv.append(formHtml);
			that.form = that.outputDiv.find('.'+that.id+'_imgUploadForm');
			
			that.imgUploadControl.off('click');
			that.imgUploadControl.on('click',function(){ 
				that.form.find('input[type="file"]').trigger('click');										
			});						
			
			if( !$.isEmptyObject(that.croppedImg)){
			
				that.cropControlRemoveCroppedImage.on('click',function(){ 
					that.croppedImg.remove();
					$(this).hide();
					
					if( !$.isEmptyObject(that.defaultImg)){ 
						that.obj.append(that.defaultImg);
					}
					
					if(that.options.outputUrlId !== ''){	$('#'+that.options.outputUrlId).val('');	}
				
				});	
			
			}
											
			that.form.find('input[type="file"]').change(function(){
				
				if (that.options.onBeforeImgUpload) that.options.onBeforeImgUpload.call(that);
				
				that.showLoader();
				that.imgUploadControl.hide();
			
				var formData = new FormData(that.form[0]);
			
				for (var key in that.options.uploadData) {
					if( that.options.uploadData.hasOwnProperty(key) ) {
						formData.append( key , that.options.uploadData[key] );	
					}
				}
				
				$.ajax({
                    url: that.options.uploadUrl,
                    data: formData,
                    context: document.body,
                    cache: false,
                    contentType: false,
                    processData: false,
                    type: 'POST'
				}).always(function(data){
                    response = typeof data =='object' ? data : jQuery.parseJSON(data);
					if(response.status=='success'){
						
						that.imgInitW = that.imgW = response.width;
						that.imgInitH = that.imgH = response.height;
						
						if(that.options.modal){	that.createModal(); }
						if( !$.isEmptyObject(that.croppedImg)){ that.croppedImg.remove(); }
						
						that.imgUrl=response.url;
						
						that.obj.append('<img src="'+response.url+'">');
						that.initCropper();
						
						that.hideLoader();

						if (that.options.onAfterImgUpload) that.options.onAfterImgUpload.call(that, response);
						
					}
					
					if(response.status=='error'){
						that.obj.append('<p style="width:100%; height:100%; text-align:center; line-height:'+that.objH+'px;">'+response.message+'</p>');
						that.hideLoader();
						setTimeout( function(){ that.reset(); },2000)
					}
					

				});
				
			});
		
		},
		createModal: function(){
			var that = this;
		
			var marginTop = that.windowH/2-that.objH/2;
			var modalHTML =  '<div id="croppicModal">'+'<div id="croppicModalObj" style="width:'+ that.objW +'px; height:'+ that.objH +'px; margin:0 auto; margin-top:'+ marginTop +'px; position: relative;"> </div>'+'</div>';

			$('body').append(modalHTML);
			
			that.modal = $('#croppicModal');
			
			that.obj = $('#croppicModalObj');
			
		},
		destroyModal: function(){
			var that = this;
			
			that.obj = that.outputDiv;
			that.modal.remove();
		},
		initCropper: function(){
			var that = this;
			
			/*SET UP SOME VARS*/
			that.img = that.obj.find('img');
			that.img.wrap('<div class="cropImgWrapper" style="overflow:hidden; z-index:1; position:absolute; width:'+that.objW+'px; height:'+that.objH+'px;"></div>');
	
			/*INIT DRAGGING*/
			that.createCropControls();
			
			if(that.options.imgEyecandy){ that.createEyecandy(); }
			that.initDrag();
			that.initialScaleImg();
		},
		createEyecandy: function(){
			var that = this;

			that.imgEyecandy = that.img.clone();
			that.imgEyecandy.css({'z-index':'0','opacity':that.options.imgEyecandyOpacity}).appendTo(that.obj);
		},
		destroyEyecandy: function(){
			var that = this;
			that.imgEyecandy.remove();
		},
		initialScaleImg:function(){
			var that = this;
			that.zoom(-that.imgInitW);
			that.zoom(40);
			
			// initial center image
			
			that.img.css({'left': -(that.imgW -that.objW)/2, 'top': -(that.imgH -that.objH)/2, 'position':'relative'});
			if(that.options.imgEyecandy){ that.imgEyecandy.css({'left': -(that.imgW -that.objW)/2, 'top': -(that.imgH -that.objH)/2, 'position':'relative'}); }
			
		},
		
		createCropControls: function(){
			var that = this;
			
			// CREATE CONTROLS
			var cropControlZoomMuchIn =      '<i class="cropControlZoomMuchIn"></i>';
			var cropControlZoomIn =          '<i class="cropControlZoomIn"></i>';
			var cropControlZoomOut =         '<i class="cropControlZoomOut"></i>';
			var cropControlZoomMuchOut =     '<i class="cropControlZoomMuchOut"></i>';
			var cropControlCrop =            '<i class="cropControlCrop"></i>';
			var cropControlReset =           '<i class="cropControlReset"></i>';
			
            var html;
            
			if(that.options.doubleZoomControls){ html =  '<div class="cropControls cropControlsCrop">'+ cropControlZoomMuchIn + cropControlZoomIn + cropControlZoomOut + cropControlZoomMuchOut + cropControlCrop + cropControlReset + '</div>'; }
			else{ html =  '<div class="cropControls cropControlsCrop">' + cropControlZoomIn + cropControlZoomOut + cropControlCrop + cropControlReset + '</div>'; }	
			
			that.obj.append(html);
			
			that.cropControlsCrop = that.obj.find('.cropControlsCrop');

			// CACHE AND BIND CONTROLS
			if(that.options.doubleZoomControls){
				that.cropControlZoomMuchIn = that.cropControlsCrop.find('.cropControlZoomMuchIn');
				that.cropControlZoomMuchIn.on('click',function(){ that.zoom( that.options.zoomFactor*10 ); });
			
				that.cropControlZoomMuchOut = that.cropControlsCrop.find('.cropControlZoomMuchOut');
				that.cropControlZoomMuchOut.on('click',function(){ that.zoom(-that.options.zoomFactor*10); });
			}
			
			that.cropControlZoomIn = that.cropControlsCrop.find('.cropControlZoomIn');
			that.cropControlZoomIn.on('click',function(){ that.zoom(that.options.zoomFactor); });

			that.cropControlZoomOut = that.cropControlsCrop.find('.cropControlZoomOut');
			that.cropControlZoomOut.on('click',function(){ that.zoom(-that.options.zoomFactor); });		

			that.cropControlCrop = that.cropControlsCrop.find('.cropControlCrop');
			that.cropControlCrop.on('click',function(){ that.crop(); });

			that.cropControlReset = that.cropControlsCrop.find('.cropControlReset');
			that.cropControlReset.on('click',function(){ that.reset(); });				
			
		},
		initDrag:function(){
			var that = this;
			
			that.img.on("mousedown", function(e) {
				
				e.preventDefault(); // disable selection

				var z_idx = that.img.css('z-index'),
                drg_h = that.img.outerHeight(),
                drg_w = that.img.outerWidth(),
                pos_y = that.img.offset().top + drg_h - e.pageY,
                pos_x = that.img.offset().left + drg_w - e.pageX;
				
				that.img.css('z-index', 1000).on("mousemove", function(e) {
					
					var imgTop = e.pageY + pos_y - drg_h;
					var imgLeft = e.pageX + pos_x - drg_w;
					
					that.img.offset({
						top:imgTop,
						left:imgLeft
					}).on("mouseup", function() {
						$(this).removeClass('draggable').css('z-index', z_idx);
					});
					
					if(that.options.imgEyecandy){ that.imgEyecandy.offset({ top:imgTop, left:imgLeft }); }
					
					if( parseInt( that.img.css('top')) > 0 ){ that.img.css('top',0);  if(that.options.imgEyecandy){ that.imgEyecandy.css('top', 0); } }
					var maxTop = -( that.imgH-that.objH); if( parseInt( that.img.css('top')) < maxTop){ that.img.css('top', maxTop); if(that.options.imgEyecandy){ that.imgEyecandy.css('top', maxTop); } }
					
					if( parseInt( that.img.css('left')) > 0 ){ that.img.css('left',0); if(that.options.imgEyecandy){ that.imgEyecandy.css('left', 0); }}
					var maxLeft = -( that.imgW-that.objW); if( parseInt( that.img.css('left')) < maxLeft){ that.img.css('left', maxLeft); if(that.options.imgEyecandy){ that.imgEyecandy.css('left', maxLeft); } }
					
					if (that.options.onImgDrag) that.options.onImgDrag.call(that);
					
				});
	
			}).on("mouseup", function() {
				that.img.off("mousemove");
			}).on("mouseout", function() {
				that.img.off("mousemove");
			});
			
		},
		zoom :function(x){
			var that = this;
			var ratio = that.imgW / that.imgH;
			var newWidth = that.imgW+x;
			var newHeight = newWidth/ratio;
			var doPositioning = true;
			
			if( newWidth < that.objW || newHeight < that.objH){
				
				if( newWidth - that.objW < newHeight - that.objH ){ 
					newWidth = that.objW;
					newHeight = newWidth/ratio;
				}else{
					newHeight = that.objH;
					newWidth = ratio * newHeight;
				}
				
				doPositioning = false;
				
			} 
			
			if( newWidth > that.imgInitW || newHeight > that.imgInitH){
				
				if( newWidth - that.imgInitW < newHeight - that.imgInitH ){ 
					newWidth = that.imgInitW;
					newHeight = newWidth/ratio;
				}else{
					newHeight = that.imgInitH;
					newWidth = ratio * newHeight;
				}
				
				doPositioning = false;
				
			}
			
			that.imgW = newWidth;
			that.img.width(newWidth); 
			
			that.imgH = newHeight;
			that.img.height(newHeight); 
	
			var newTop = parseInt( that.img.css('top') ) - x/2;
			var newLeft = parseInt( that.img.css('left') ) - x/2;
			
			if( newTop>0 ){ newTop=0;}
			if( newLeft>0 ){ newLeft=0;}
			
			var maxTop = -( newHeight-that.objH); if( newTop < maxTop){	newTop = maxTop;	}
			var maxLeft = -( newWidth-that.objW); if( newLeft < maxLeft){	newLeft = maxLeft;	}
			
			if( doPositioning ){
				that.img.css({'top':newTop, 'left':newLeft}); 
			}
			
			if(that.options.imgEyecandy){
				that.imgEyecandy.width(newWidth);
				that.imgEyecandy.height(newHeight);
				if( doPositioning ){
					that.imgEyecandy.css({'top':newTop, 'left':newLeft}); 
				}
			}	
			
			if (that.options.onImgZoom) that.options.onImgZoom.call(that);

		},
		crop:function(){
			var that = this;
			
			if (that.options.onBeforeImgCrop) that.options.onBeforeImgCrop.call(that);
			
			that.cropControlsCrop.hide();
			that.showLoader();
	
			var cropData = {
					imgUrl:that.imgUrl,
					imgInitW:that.imgInitW,
					imgInitH:that.imgInitH,
					imgW:that.imgW,
					imgH:that.imgH,
					imgY1:Math.abs( parseInt( that.img.css('top') ) ),
					imgX1:Math.abs( parseInt( that.img.css('left') ) ),
					cropH:that.objH,
					cropW:that.objW
				};
			
			var formData = new FormData();

			for (var key in cropData) {
				if( cropData.hasOwnProperty(key) ) {
						formData.append( key , cropData[key] );
				}
			}
			
			for (var key in that.options.cropData) {
				if( that.options.cropData.hasOwnProperty(key) ) {
						formData.append( key , that.options.cropData[key] );
				}
			}

			$.ajax({
                url: that.options.cropUrl,
                data: formData,
                context: document.body,
                cache: false,
                contentType: false,
                processData: false,
                type: 'POST'
				}).always(function(data){
                    response = typeof data =='object' ? data : jQuery.parseJSON(data);
					if(response.status=='success'){
						
						that.imgEyecandy.hide();
						
						that.destroy();
						
						that.obj.append('<img class="croppedImg" src="'+response.url+'">');
						if(that.options.outputUrlId !== ''){	$('#'+that.options.outputUrlId).val(response.url);	}
						
						that.croppedImg = that.obj.find('.croppedImg');

						that.init();
						
						that.hideLoader();

					}
					if(response.status=='error'){
						that.obj.append('<p style="width:100%; height:100%;>'+response.message+'</p>">');
					}
					
					if (that.options.onAfterImgCrop) that.options.onAfterImgCrop.call(that, response);
				 
				});
		},
		showLoader:function(){
			var that = this;
			
			that.obj.append(that.options.loaderHtml);
			that.loader = that.obj.find('.loader');
			
		},
		hideLoader:function(){
			var that = this;
			that.loader.remove();	
		},
		reset:function(){
			var that = this;
			that.destroy();
			
			that.init();
			
			if( !$.isEmptyObject(that.croppedImg)){ 
				that.obj.append(that.croppedImg); 
				if(that.options.outputUrlId !== ''){	$('#'+that.options.outputUrlId).val(that.croppedImg.attr('url'));	}
			}
			
		},
		destroy:function(){
			var that = this;
			if(that.options.modal && !$.isEmptyObject(that.modal) ){ that.destroyModal(); }
			if(that.options.imgEyecandy && !$.isEmptyObject(that.imgEyecandy) ){  that.destroyEyecandy(); }
			if( !$.isEmptyObject( that.cropControlsUpload ) ){  that.cropControlsUpload.remove(); }
			if( !$.isEmptyObject( that.cropControlsCrop ) ){   that.cropControlsCrop.remove(); }
			if( !$.isEmptyObject( that.loader ) ){   that.loader.remove(); }
			if( !$.isEmptyObject( that.form ) ){   that.form.remove(); }
			that.obj.html('');
		}
	};
})(window, document);