www.gusucode.com > 迪恩育儿亲子4商城商家+手机版【整站带测试数据】源码程序 > web/static/js/imgcropper.js
/*
[Discuz!] (C)2001-2099 Comsenz Inc.
This is NOT a freeware, use is subject to license terms
$Id: imgcropper.js 30998 2012-07-06 07:22:08Z zhangguosheng $
*/
(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);
}
};
})();