imgcropper.js 20 KB

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(function(){ImgCropper = function() {this.options = {opacity: 50,color: "",width: 0,height: 0,resize: false,right: "",left: "",up: "",down: "",rightDown: "",leftDown: "",rightUp: "",leftUp: "",min: false,minWidth: 50,minHeight: 50,scale: false,ratio: 0,Preview: "",viewWidth: 0,viewHeight: 0};this.setParameter.apply(this, arguments);};ImgCropper.prototype = {setParameter: function(container, handle, url, options) {this._container = $(container);this._layHandle = $(handle);this.url = url;this._layBase = this._container.appendChild(document.createElement("img"));this._layCropper = this._container.appendChild(document.createElement("img"));this._layCropper.onload = Util.bindApply(this, this.setPos);this._tempImg = document.createElement("img");this._tempImg.onload = Util.bindApply(this, this.setSize);this.options = Util.setOptions(this.options, options || {});this.opacity = Math.round(this.options.opacity);this.color = this.options.color;this.scale = !!this.options.scale;this.ratio = Math.max(this.options.ratio, 0);this.width = Math.round(this.options.width);this.height = Math.round(this.options.height);this.setLayHandle = true;var oPreview = $(this.options.Preview);if(oPreview){oPreview.style.position = "relative";oPreview.style.overflow = "hidden";this.viewWidth = Math.round(this.options.viewWidth);this.viewHeight = Math.round(this.options.viewHeight);this._view = oPreview.appendChild(document.createElement("img"));this._view.style.position = "absolute";this._view.onload = Util.bindApply(this, this.SetPreview);}this._drag = new dzDrag(handle, {limit:true, container:container, onDragMove: Util.bindApply(this, this.setPos)});this.resize = !!this.options.resize;if(this.resize){var op = this.options;var _resize = new ImgCropperResize(container, {max: false, scale:true, min:true, minWidth:options.minWidth, minHeight:options.minHeight, onResize: Util.bindApply(this, this.scaleImg)});op.rightDown && (_resize.set(op.rightDown, "right-down"));op.leftDown && (_resize.set(op.leftDown, "left-down"));op.rightUp && (_resize.set(op.rightUp, "right-up"));op.leftUp && (_resize.set(op.leftUp, "left-up"));op.right && (_resize.set(op.right, "right"));op.left && (_resize.set(op.left, "left"));op.down && (_resize.set(op.down, "down"));op.up && (_resize.set(op.up, "up"));this.min = !!this.options.min;this.minWidth = Math.round(this.options.minWidth);this.minHeight = Math.round(this.options.minHeight);this._resize = _resize;}this._container.style.position = "relative";this._container.style.overflow = "hidden";this._layHandle.style.zIndex = 200;this._layCropper.style.zIndex = 100;this._layBase.style.position = this._layCropper.style.position = "absolute";this._layBase.style.top = this._layBase.style.left = this._layCropper.style.top = this._layCropper.style.left = 0;this.initialize();},initialize: function() {this.color && (this._container.style.backgroundColor = this.color);this._tempImg.src = this._layBase.src = this._layCropper.src = this.url;if(BROWSER.ie){this._layBase.style.filter = "alpha(opacity:" + this.opacity + ")";this._layHandle.style.filter = "alpha(opacity:0)";this._layHandle.style.backgroundColor = "#FFF";} else {this._layBase.style.opacity = this.opacity / 100;}this._view && (this._view.src = this.url);if(this.resize){with(this._resize){Scale = this.scale; Ratio = this.ratio; Min = this.min; minWidth = this.minWidth; minHeight = this.minHeight;}}},setPos: function() {if(BROWSER.ie == 6.0){ with(this._layHandle.style){ zoom = .9; zoom = 1; }; };var p = this.getPos();this._layCropper.style.clip = "rect(" + p.Top + "px " + (p.Left + p.Width) + "px " + (p.Top + p.Height) + "px " + p.Left + "px)";this.SetPreview();parent.resetHeight(this._container, this.getPos(), this._layBase);},scaleImg:function() {this.height = this._resize._styleHeight;this.width = this._resize._styleWidth;this.initialize();this.setSize();this.setPos();var maxRight = (parseInt(this._layHandle.style.left) || 0) + (parseInt(this._layHandle.offsetWidth) || 0);var maxBottom = (parseInt(this._layHandle.style.top) || 0) + (parseInt(this._layHandle.offsetHeight) || 0);if(this._container != null) {if(maxRight > this._container.clientWidth) {var nowLeft = this._container.clientWidth - this._layHandle.offsetWidth;this._layHandle.style.left = (nowLeft < 0 ? 0 : nowLeft) + "px";}if(maxBottom > this._container.clientHeight) {var nowTop = this._container.clientHeight - this._layHandle.offsetHeight;this._layHandle.style.top = (nowTop < 0 ? 0 : nowTop) + "px";}}parent.resetHeight(this._container, this.getPos(), this._layBase);},SetPreview: function() {if(this._view){var p = this.getPos(), s = this.getSize(p.Width, p.Height, this.viewWidth, this.viewHeight), scale = s.Height / p.Height;var pHeight = this._layBase.height * scale, pWidth = this._layBase.width * scale, pTop = p.Top * scale, pLeft = p.Left * scale;with(this._view.style){width = pWidth + "px"; height = pHeight + "px"; top = - pTop + "px "; left = - pLeft + "px";clip = "rect(" + pTop + "px " + (pLeft + s.Width) + "px " + (pTop + s.Height) + "px " + pLeft + "px)";}}},setSize: function() {if(this.width > this._tempImg.width) {this.width = this._tempImg.width;}if(this.height > this._tempImg.height) {this.height = this._tempImg.height;}var s = this.getSize(this._tempImg.width, this._tempImg.height, this.width, this.height);if(this.options.min && (s.Width <= this.options.minWidth || s.Height <= this.options.minHeight)) {return false;}this._layBase.style.width = this._layCropper.style.width = s.Width + "px";this._layBase.style.height = this._layCropper.style.height = s.Height + "px";this._drag.maxRight = s.Width; this._drag.maxBottom = s.Height;if(this.resize) {this._container.style.width = this._layBase.style.width; this._container.style.height = this._layBase.style.height;if(this.setLayHandle) {this._layHandle.style.left = ((s.Width - this._layHandle.offsetWidth)/2)+"px";this._layHandle.style.top = ((s.Height - this._layHandle.offsetHeight)/2)+"px";this.setPos();this.setLayHandle = false;}}},getPos: function() {with(this._layHandle){return { Top: offsetTop, Left: offsetLeft, Width: offsetWidth, Height: offsetHeight };}},getSize: function(nowWidth, nowHeight, fixWidth, fixHeight) {var iWidth = nowWidth, iHeight = nowHeight, scale = iWidth / iHeight;if(fixHeight){ iWidth = (iHeight = fixHeight) * scale; }if(fixWidth && (!fixHeight || iWidth > fixWidth)){ iHeight = (iWidth = fixWidth) / scale; }return { Width: iWidth, Height: iHeight }}};ImgCropperResize = function() {this.options = {max: false,container: "",maxLeft: 0,maxRight: 9999,maxTop: 0,maxBottom: 9999,min: false,minWidth: 50,minHeight: 50,scale: false,ratio: 0,onResize: function(){}};this.initialize.apply(this, arguments);};ImgCropperResize.prototype = {initialize: function(resizeObjId, options) {this.options = Util.setOptions(this.options, options || {});this._resizeObj = $(resizeObjId);this._styleWidth = this._styleHeight = this._styleLeft = this._styleTop = 0;this._sideRight = this._sideDown = this._sideLeft = this._sideUp = 0;this._fixLeft = this._fixTop = 0;this._scaleLeft = this._scaleTop = 0;this._maxSet = function(){};this._maxRightWidth = this._maxDownHeight = this._maxUpHeight = this._maxLeftWidth = 0;this._maxScaleWidth = this._maxScaleHeight = 0;this._fun = function(){};var _style = Util.currentStyle(this._resizeObj);this._borderX = (parseInt(_style.borderLeftWidth) || 0) + (parseInt(_style.borderRightWidth) || 0);this._borderY = (parseInt(_style.borderTopWidth) || 0) + (parseInt(_style.borderBottomWidth) || 0);this._resizeTranscript = Util.bindApply(this, this.resize);this._stopTranscript = Util.bindApply(this, this.stop);this.max = !!this.options.max;this._container = $(this.options.container) || null;this.maxLeft = Math.round(this.options.maxLeft);this.maxRight = Math.round(this.options.maxRight);this.maxTop = Math.round(this.options.maxTop);this.maxBottom = Math.round(this.options.maxBottom);this.min = !!this.options.min;this.minWidth = Math.round(this.options.minWidth);this.minHeight = Math.round(this.options.minHeight);this.scale = !!this.options.scale;this.ratio = Math.max(this.options.ratio, 0);this.onResize = this.options.onResize;this._resizeObj.style.position = "absolute";!this._container || Util.currentStyle(this._container).position == "relative" || (this._container.style.position = "relative");},set: function(resize, side) {var resize = $(resize), fun;if(!resize) return;switch(side.toLowerCase()) {case "up":fun = this.up;break;case "down":fun = this.down;break;case "left":fun = this.left;break;case "right":fun = this.right;break;case "left-up":fun = this.leftUp;break;case "right-up":fun = this.rightUp;break;case "left-down":fun = this.leftDown;break;case "right-down" :default:fun = this.rightDown;break;};Util.addEventHandler(resize, "mousedown", Util.bindApply(this, this.start, fun));},start: function(oEvent, fun, touch) {oEvent.stopPropagation ? oEvent.stopPropagation() : (oEvent.cancelBubble = true);this._fun = fun;this._styleWidth = this._resizeObj.clientWidth;this._styleHeight = this._resizeObj.clientHeight;this._styleLeft = this._resizeObj.offsetLeft;this._styleTop = this._resizeObj.offsetTop;this._sideLeft = oEvent.clientX - this._styleWidth;this._sideRight = oEvent.clientX + this._styleWidth;this._sideUp = oEvent.clientY - this._styleHeight;this._sideDown = oEvent.clientY + this._styleHeight;this._fixLeft = this._styleLeft + this._styleWidth;this._fixTop = this._styleTop + this._styleHeight;if(this.scale) {this.ratio = Math.max(this.ratio, 0) || this._styleWidth / this._styleHeight;this._scaleLeft = this._styleLeft + this._styleWidth / 2;this._scaleTop = this._styleTop + this._styleHeight / 2;};if(this.max) {var maxLeft = this.maxLeft, maxRight = this.maxRight, maxTop = this.maxTop, maxBottom = this.maxBottom;if(!!this._container){maxLeft = Math.max(maxLeft, 0);maxTop = Math.max(maxTop, 0);maxRight = Math.min(maxRight, this._container.clientWidth);maxBottom = Math.min(maxBottom, this._container.clientHeight);};maxRight = Math.max(maxRight, maxLeft + (this.min ? this.minWidth : 0) + this._borderX);maxBottom = Math.max(maxBottom, maxTop + (this.min ? this.minHeight : 0) + this._borderY);this._mxSet = function() {this._maxRightWidth = maxRight - this._styleLeft - this._borderX;this._maxDownHeight = maxBottom - this._styleTop - this._borderY;this._maxUpHeight = Math.max(this._fixTop - maxTop, this.min ? this.minHeight : 0);this._maxLeftWidth = Math.max(this._fixLeft - maxLeft, this.min ? this.minWidth : 0);};this._mxSet();if(this.scale) {this._maxScaleWidth = Math.min(this._scaleLeft - maxLeft, maxRight - this._scaleLeft - this._borderX) * 2;this._maxScaleHeight = Math.min(this._scaleTop - maxTop, maxBottom - this._scaleTop - this._borderY) * 2;}}Util.addEventHandler(document, "mousemove", this._resizeTranscript);Util.addEventHandler(document, "mouseup", this._stopTranscript);if(BROWSER.ie){Util.addEventHandler(this._resizeObj, "losecapture", this._stopTranscript);this._resizeObj.setCapture();}else{Util.addEventHandler(window, "blur", this._stopTranscript);oEvent.preventDefault();};},resize: function(e) {window.getSelection ? window.getSelection().removeAllRanges() : document.selection.empty();this._fun(e);if(this.options.min && (this._styleWidth <= this.options.minWidth || this._styleHeight <= this.options.minHeight)) {return false;}with(this._resizeObj.style) {width = this._styleWidth + "px"; height = this._styleHeight + "px";top = this._styleTop + "px"; left = this._styleLeft + "px";}this.onResize();},up: function(e) {this.repairY(this._sideDown - e.clientY, this._maxUpHeight);this.repairTop();this.turnDown(this.down);},down: function(e) {this.repairY(e.clientY - this._sideUp, this._maxDownHeight);this.turnUp(this.up);},right: function(e) {this.repairX(e.clientX - this._sideLeft, this._maxRightWidth);this.turnLeft(this.left);},left: function(e) {this.repairX(this._sideRight - e.clientX, this._maxLeftWidth);this.repairLeft();this.turnRight(this.right);},rightDown: function(e) {this.repairAngle(e.clientX - this._sideLeft, this._maxRightWidth,e.clientY - this._sideUp, this._maxDownHeight);this.turnLeft(this.leftDown) || this.scale || this.turnUp(this.rightUp);},rightUp: function(e) {this.repairAngle(e.clientX - this._sideLeft, this._maxRightWidth,this._sideDown - e.clientY, this._maxUpHeight);this.repairTop();this.turnLeft(this.leftUp) || this.scale || this.turnDown(this.rightDown);},leftDown: function(e) {this.repairAngle(this._sideRight - e.clientX, this._maxLeftWidth,e.clientY - this._sideUp, this._maxDownHeight);this.repairLeft();this.turnRight(this.rightDown) || this.scale || this.turnUp(this.leftUp);},leftUp: function(e) {this.repairAngle(this._sideRight - e.clientX, this._maxLeftWidth,this._sideDown - e.clientY, this._maxUpHeight);this.repairTop();this.repairLeft();this.turnRight(this.rightUp) || this.scale || this.turnDown(this.leftDown);},repairX: function(iWidth, maxWidth) {iWidth = this.repairWidth(iWidth, maxWidth);if(this.scale){var iHeight = this.repairScaleHeight(iWidth);if(this.max && iHeight > this._maxScaleHeight){iHeight = this._maxScaleHeight;iWidth = this.repairScaleWidth(iHeight);}else if(this.min && iHeight < this.minHeight){var tWidth = this.repairScaleWidth(this.minHeight);if(tWidth < maxWidth){ iHeight = this.minHeight; iWidth = tWidth; }}this._styleHeight = iHeight;this._styleTop = this._scaleTop - iHeight / 2;}this._styleWidth = iWidth;},repairY: function(iHeight, maxHeight) {iHeight = this.repairHeight(iHeight, maxHeight);if(this.scale){var iWidth = this.repairScaleWidth(iHeight);if(this.max && iWidth > this._maxScaleWidth){iWidth = this._maxScaleWidth;iHeight = this.repairScaleHeight(iWidth);}else if(this.min && iWidth < this.minWidth){var tHeight = this.repairScaleHeight(this.minWidth);if(tHeight < maxHeight){ iWidth = this.minWidth; iHeight = tHeight; }}this._styleWidth = iWidth;this._styleLeft = this._scaleLeft - iWidth / 2;}this._styleHeight = iHeight;},repairAngle: function(iWidth, maxWidth, iHeight, maxHeight) {iWidth = this.repairWidth(iWidth, maxWidth);if(this.scale) {iHeight = this.repairScaleHeight(iWidth);if(this.max && iHeight > maxHeight){iHeight = maxHeight;iWidth = this.repairScaleWidth(iHeight);}else if(this.min && iHeight < this.minHeight){var tWidth = this.repairScaleWidth(this.minHeight);if(tWidth < maxWidth){ iHeight = this.minHeight; iWidth = tWidth; }}} else {iHeight = this.repairHeight(iHeight, maxHeight);}this._styleWidth = iWidth;this._styleHeight = iHeight;},repairTop: function() {this._styleTop = this._fixTop - this._styleHeight;},repairLeft: function() {this._styleLeft = this._fixLeft - this._styleWidth;},repairHeight: function(iHeight, maxHeight) {iHeight = Math.min(this.max ? maxHeight : iHeight, iHeight);iHeight = Math.max(this.min ? this.minHeight : iHeight, iHeight, 0);return iHeight;},repairWidth: function(iWidth, maxWidth) {iWidth = Math.min(this.max ? maxWidth : iWidth, iWidth);iWidth = Math.max(this.min ? this.minWidth : iWidth, iWidth, 0);return iWidth;},repairScaleHeight: function(iWidth) {return Math.max(Math.round((iWidth + this._borderX) / this.ratio - this._borderY), 0);},repairScaleWidth: function(iHeight) {return Math.max(Math.round((iHeight + this._borderY) * this.ratio - this._borderX), 0);},turnRight: function(fun) {if(!(this.min || this._styleWidth)){this._fun = fun;this._sideLeft = this._sideRight;this.max && this._mxSet();return true;}},turnLeft: function(fun) {if(!(this.min || this._styleWidth)){this._fun = fun;this._sideRight = this._sideLeft;this._fixLeft = this._styleLeft;this.max && this._mxSet();return true;}},turnUp: function(fun) {if(!(this.min || this._styleHeight)){this._fun = fun;this._sideDown = this._sideUp;this._fixTop = this._styleTop;this.max && this._mxSet();return true;}},turnDown: function(fun) {if(!(this.min || this._styleHeight)){this._fun = fun;this._sideUp = this._sideDown;this.max && this._mxSet();return true;}},stop: function() {Util.removeEventHandler(document, "mousemove", this._resizeTranscript);Util.removeEventHandler(document, "mouseup", this._stopTranscript);if(BROWSER.ie){Util.removeEventHandler(this._resizeObj, "losecapture", this._stopTranscript);this._resizeObj.releaseCapture();}else{Util.removeEventHandler(window, "blur", this._stopTranscript);}}};dzDrag = function() {this.options = {handle: '',limit: false,maxLeft: 0,maxRight: 9999,maxTop: 0,maxBottom: 9999,container: '',lockX: false,lockY: false,onDragStart: function(){},onDragMove: function(){},onDragEnd: function(){}};this.initialize.apply(this, arguments);};dzDrag.prototype = {initialize: function(dragId, options) {this.options = Util.setOptions(this.options, options || {});this._dragObj = $(dragId);this._x = this._y = 0;this._marginLeft = this._marginTop = 0;this._handle = $(this.options.handle) || this._dragObj;this._container = $(this.options.container) || null;this._dragObj.style.position = "absolute";this._dragEndTranscript = Util.bindApply(this, this.dragEnd);this._dragMoveTranscript = Util.bindApply(this, this.dragMove);Util.addEventHandler(this._handle, "mousedown", Util.bindApply(this, this.dragStart));},dragStart: function(event) {this.setLimit();this._x = event.clientX - this._dragObj.offsetLeft;this._y = event.clientY - this._dragObj.offsetTop;var curStyle = Util.currentStyle(this._dragObj);this._marginLeft = parseInt(curStyle.marginLeft) || 0;this._marginTop = parseInt(curStyle.marginTop) || 0;Util.addEventHandler(document, "mousemove", this._dragMoveTranscript);Util.addEventHandler(document, "mouseup", this._dragEndTranscript);if(BROWSER.ie){Util.addEventHandler(this._handle, "losecapture", this._dragEndTranscript);this._handle.setCapture();}else{Util.addEventHandler(window, "blur", this._dragEndTranscript);event.preventDefault();};this.options.onDragStart();},dragMove: function(event) {window.getSelection ? window.getSelection().removeAllRanges() : document.selection.empty();var iLeft = event.clientX - this._x;var iTop = event.clientY - this._y;if(this.options.limit) {var maxLeft = this.options.maxLeft, maxRight = this.options.maxRight, maxTop = this.options.maxTop, maxBottom = this.options.maxBottom;if(this._container != null){maxLeft = Math.max(maxLeft, 0);maxTop = Math.max(maxTop, 0);maxRight = Math.min(maxRight, this._container.clientWidth);maxBottom = Math.min(maxBottom, this._container.clientHeight);};iLeft = Math.max(Math.min(iLeft, maxRight - this._dragObj.offsetWidth), maxLeft);iTop = Math.max(Math.min(iTop, maxBottom - this._dragObj.offsetHeight), maxTop);}if(!this.options.lockX) { this._dragObj.style.left = iLeft - this._marginLeft + "px"; }if(!this.options.lockY) { this._dragObj.style.top = iTop - this._marginTop + "px"; }this.options.onDragMove();},dragEnd: function(event) {Util.removeEventHandler(document, "mousemove", this._dragMoveTranscript);Util.removeEventHandler(document, "mouseup", this._dragEndTranscript);if(BROWSER.ie) {Util.removeEventHandler(this._handle, "losecapture", this._dragEndTranscript);this._handle.releaseCapture();} else {Util.removeEventHandler(window, "blur", this._dragEndTranscript);}this.options.onDragEnd();},setLimit: function() {if(this.options.limit) {this.options.maxRight = Math.max(this.options.maxRight, this.options.maxLeft + this._dragObj.offsetWidth);this.options.maxBottom = Math.max(this.options.maxBottom, this.options.maxTop + this._dragObj.offsetHeight);!this._container || Util.currentStyle(this._container).position == "relative" || Util.currentStyle(this._container).position == "absolute" || (this._container.style.position = "relative");}}};var Util = {setOptions: function(object, source) {for(var property in source) {object[property] = source[property];}return object;},addEventHandler: function(targetObj, eventType, funHandler) {if(targetObj.addEventListener) {targetObj.addEventListener(eventType, funHandler, false);} else if (targetObj.attachEvent) {targetObj.attachEvent("on" + eventType, funHandler);} else {targetObj["on" + eventType] = funHandler;}},removeEventHandler: function(targetObj, eventType, funHandler) {if(targetObj.removeEventListener) {targetObj.removeEventListener(eventType, funHandler, false);} else if (targetObj.detachEvent) {targetObj.detachEvent("on" + eventType, funHandler);} else {targetObj["on" + eventType] = null;}},bindApply: function(object, fun) {var args = Array.prototype.slice.call(arguments).slice(2);return function(event) {return fun.apply(object, [event || window.event].concat(args));};},currentStyle: function(element){return element.currentStyle || document.defaultView.getComputedStyle(element, null);}};})();