// Show the crop box manually
crop: function () {
if (!this.isBuilt || this.isDisabled) {
return;
}
if (!this.isCropped) {
this.isCropped = true;
this.limitCropBox(true, true);
if (this.options.modal) {
this.$dragBox.addClass(CLASS_MODAL);
}
this.$cropBox.removeClass(CLASS_HIDDEN);
}
this.setCropBoxData(this.initialCropBox);
},
// Reset the image and crop box to their initial states
reset: function () {
if (!this.isBuilt || this.isDisabled) {
return;
}
this.image = $.extend({}, this.initialImage);
this.canvas = $.extend({}, this.initialCanvas);
this.cropBox = $.extend({}, this.initialCropBox);
this.renderCanvas();
if (this.isCropped) {
this.renderCropBox();
}
},
// Clear the crop box
clear: function () {
if (!this.isCropped || this.isDisabled) {
return;
}
$.extend(this.cropBox, {
left: 0,
top: 0,
width: 0,
height: 0
});
this.isCropped = false;
this.renderCropBox();
this.limitCanvas(true, true);
// Render canvas after crop box rendered
this.renderCanvas();
this.$dragBox.removeClass(CLASS_MODAL);
this.$cropBox.addClass(CLASS_HIDDEN);
},
/**
* Replace the image's src and rebuild the cropper
*
* @param {String} url
* @param {Boolean} onlyColorChanged (optional)
*/
replace: function (url, onlyColorChanged) {
if (!this.isDisabled && url) {
if (this.isImg) {
this.$element.attr('src', url);
}
if (onlyColorChanged) {
this.url = url;
this.$clone.attr('src', url);
if (this.isBuilt) {
this.$preview.find('img').add(this.$clone2).attr('src', url);
}
} else {
if (this.isImg) {
this.isReplaced = true;
}
// Clear previous data
this.options.data = null;
this.load(url);
}
}
},
// Enable (unfreeze) the cropper
enable: function () {
if (this.isBuilt) {
this.isDisabled = false;
this.$cropper.removeClass(CLASS_DISABLED);
}
},
// Disable (freeze) the cropper
disable: function () {
if (this.isBuilt) {
this.isDisabled = true;
this.$cropper.addClass(CLASS_DISABLED);
}
},
// Destroy the cropper and remove the instance from the image
destroy: function () {
var $this = this.$element;
if (this.isLoaded) {
if (this.isImg && this.isReplaced) {
$this.attr('src', this.originalUrl);
}
this.unbuild();
$this.removeClass(CLASS_HIDDEN);
} else {
if (this.isImg) {
$this.off(EVENT_LOAD, this.start);
} else if (this.$clone) {
this.$clone.remove();
}
}
$this.removeData(NAMESPACE);
},
/**
* Move the canvas with relative offsets
*
* @param {Number} offsetX
* @param {Number} offsetY (optional)
*/
move: function (offsetX, offsetY) {
var canvas = this.canvas;
this.moveTo(
isUndefined(offsetX) ? offsetX : canvas.left + num(offsetX),
isUndefined(offsetY) ? offsetY : canvas.top + num(offsetY)
);
},
/**
* Move the canvas to an absolute point
*
* @param {Number} x
* @param {Number} y (optional)
*/
moveTo: function (x, y) {
var canvas = this.canvas;
var isChanged = false;
// If "y" is not present, its default value is "x"
if (isUndefined(y)) {
y = x;
}
x = num(x);
y = num(y);
if (this.isBuilt && !this.isDisabled && this.options.movable) {
if (isNumber(x)) {
canvas.left = x;
isChanged = true;
}
if (isNumber(y)) {
canvas.top = y;
isChanged = true;
}
if (isChanged) {
this.renderCanvas(true);
}
}
},
/**
* Zoom the canvas with a relative ratio
*
* @param {Number} ratio
* @param {jQuery Event} _event (private)
*/
zoom: function (ratio, _event) {
var canvas = this.canvas;
ratio = num(ratio);
if (ratio < 0) {
ratio = 1 / (1 - ratio);
} else {
ratio = 1 + ratio;
}
this.zoomTo(canvas.width * ratio / canvas.naturalWidth, _event);
},
/**
* Zoom the canvas to an absolute ratio
*
* @param {Number} ratio
* @param {jQuery Event} _event (private)
*/
zoomTo: function (ratio, _event) {
var options = this.options;
var canvas = this.canvas;
var width = canvas.width;
var height = canvas.height;
var naturalWidth = canvas.naturalWidth;
var naturalHeight = canvas.naturalHeight;
var originalEvent;
var newWidth;
var newHeight;
var offset;
var center;
ratio = num(ratio);
if (ratio >= 0 && this.isBuilt && !this.isDisabled && options.zoomable) {
newWidth = naturalWidth * ratio;
newHeight = naturalHeight * ratio;
if (_event) {
originalEvent = _event.originalEvent;
}
if (this.trigger(EVENT_ZOOM, {
originalEvent: originalEvent,
oldRatio: width / naturalWidth,
ratio: newWidth / naturalWidth
}).isDefaultPrevented()) {
return;
}
if (originalEvent) {
offset = this.$cropper.offset();
center = originalEvent.touches ? getTouchesCenter(originalEvent.touches) : {
pageX: _event.pageX || originalEvent.pageX || 0,
pageY: _event.pageY || originalEvent.pageY || 0
};
// Zoom from the triggering point of the event
canvas.left -= (newWidth - width) * (
((center.pageX - offset.left) - canvas.left) / width
);
canvas.top -= (newHeight - height) * (
((center.pageY - offset.top) - canvas.top) / height
);
} else {
// Zoom from the center of the canvas
canvas.left -= (newWidth - width) / 2;
canvas.top -= (newHeight - height) / 2;
}
canvas.width = newWidth;
canvas.height = newHeight;
this.renderCanvas(true);
}
},
/**
* Rotate the canvas with a relative degree
*
* @param {Number} degree
*/
rotate: function (degree) {
this.rotateTo((this.image.rotate || 0) + num(degree));
},
/**
* Rotate the canvas to an absolute degree
* https://developer.mozilla.org/en-US/docs/Web/CSS/transform-function#rotate()
*
* @param {Number} degree
*/
rotateTo: function (degree) {
degree = num(degree);
if (isNumber(degree) && this.isBuilt && !this.isDisabled && this.options.rotatable) {
this.image.rotate = degree % 360;
this.isRotated = true;
this.renderCanvas(true);
}
},
/**
* Scale the image
* https://developer.mozilla.org/en-US/docs/Web/CSS/transform-function#scale()
*
* @param {Number} scaleX
* @param {Number} scaleY (optional)
*/
scale: function (scaleX, scaleY) {
var image = this.image;
var isChanged = false;
// If "scaleY" is not present, its default value is "scaleX"
if (isUndefined(scaleY)) {
scaleY = scaleX;
}
scaleX = num(scaleX);
scaleY = num(scaleY);
if (this.isBuilt && !this.isDisabled && this.options.scalable) {
if (isNumber(scaleX)) {
image.scaleX = scaleX;
isChanged = true;
}
if (isNumber(scaleY)) {
image.scaleY = scaleY;
isChanged = true;
}
if (isChanged) {
this.renderImage(true);
}
}
},
/**
* Scale the abscissa of the image
*
* @param {Number} scaleX
*/
scaleX: function (scaleX) {
var scaleY = this.image.scaleY;
this.scale(scaleX, isNumber(scaleY) ? scaleY : 1);
},
/**
* Scale the ordinate of the image
*
* @param {Number} scaleY
*/
scaleY: function (scaleY) {
var scaleX = this.image.scaleX;
this.scale(isNumber(scaleX) ? scaleX : 1, scaleY);
},
/**
* Get the cropped area position and size data (base on the original image)
*
* @param {Boolean} isRounded (optional)
* @return {Object} data
*/
getData: function (isRounded) {
var options = this.options;
var image = this.image;
var canvas = this.canvas;
var cropBox = this.cropBox;
var ratio;
var data;
if (this.isBuilt && this.isCropped) {
data = {
x: cropBox.left - canvas.left,
y: cropBox.top - canvas.top,
width: cropBox.width,
height: cropBox.height
};
ratio = image.width / image.naturalWidth;
$.each(data, function (i, n) {
n = n / ratio;
data[i] = isRounded ? round(n) : n;
});
} else {
data = {
x: 0,
y: 0,
width: 0,
height: 0
};
}
if (options.rotatable) {
data.rotate = image.rotate || 0;
}
if (options.scalable) {
data.scaleX = image.scaleX || 1;
data.scaleY = image.scaleY || 1;
}
return data;
},
/**
* Set the cropped area position and size with new data
*
* @param {Object} data
*/
setData: function (data) {
var options = this.options;
var image = this.image;
var canvas = this.canvas;
var cropBoxData = {};
var isRotated;
var isScaled;
var ratio;
if ($.isFunction(data)) {
data = data.call(this.element);
}
if (this.isBuilt && !this.isDisabled && $.isPlainObject(data)) {
if (options.rotatable) {
if (isNumber(data.rotate) && data.rotate !== image.rotate) {
image.rotate = data.rotate;
this.isRotated = isRotated = true;
}
}
if (options.scalable) {
if (isNumber(data.scaleX) && data.scaleX !== image.scaleX) {
image.scaleX = data.scaleX;
isScaled = true;
}
if (isNumber(data.scaleY) && data.scaleY !== image.scaleY) {
image.scaleY = data.scaleY;
isScaled = true;
}
}
if (isRotated) {
this.renderCanvas();
} else if (isScaled) {
this.renderImage();
}
ratio = image.width / image.naturalWidth;
if (isNumber(data.x)) {
cropBoxData.left = data.x * ratio + canvas.left;
}
if (isNumber(data.y)) {
cropBoxData.top = data.y * ratio + canvas.top;
}
if (isNumber(data.width)) {
cropBoxData.width = data.width * ratio;
}
if (isNumber(data.height)) {
cropBoxData.height = data.height * ratio;
}
this.setCropBoxData(cropBoxData);
}
},
/**
* Get the container size data
*
* @return {Object} data
*/
getContainerData: function () {
return this.isBuilt ? this.container : {};
},
/**
* Get the image position and size data
*
* @return {Object} data
*/
getImageData: function () {
return this.isLoaded ? this.image : {};
},
/**
* Get the canvas position and size data
*
* @return {Object} data
*/
getCanvasData: function () {
var canvas = this.canvas;
var data = {};
if (this.isBuilt) {
$.each([
'left',
'top',
'width',
'height',
'naturalWidth',
'naturalHeight'
], function (i, n) {
data[n] = canvas[n];
});
}
return data;
},
/**
* Set the canvas position and size with new data
*
* @param {Object} data
*/
setCanvasData: function (data) {
var canvas = this.canvas;
var aspectRatio = canvas.aspectRatio;
if ($.isFunction(data)) {
data = data.call(this.$element);
}
if (this.isBuilt && !this.isDisabled && $.isPlainObject(data)) {
if (isNumber(data.left)) {
canvas.left = data.left;
}
if (isNumber(data.top)) {
canvas.top = data.top;
}
if (isNumber(data.width)) {
canvas.width = data.width;
canvas.height = data.width / aspectRatio;
} else if (isNumber(data.height)) {
canvas.height = data.height;
canvas.width = data.height * aspectRatio;
}
this.renderCanvas(true);
}
},
/**
* Get the crop box position and size data
*
* @return {Object} data
*/
getCropBoxData: function () {
var cropBox = this.cropBox;
var data;
if (this.isBuilt && this.isCropped) {
data = {
left: cropBox.left,
top: cropBox.top,
width: cropBox.width,
height: cropBox.height
};
}
return data || {};
},
/**
* Set the crop box position and size with new data
*
* @param {Object} data
*/
setCropBoxData: function (data) {
var cropBox = this.cropBox;
var aspectRatio = this.options.aspectRatio;
var isWidthChanged;
var isHeightChanged;
if ($.isFunction(data)) {
data = data.call(this.$element);
}
if (this.isBuilt && this.isCropped && !this.isDisabled && $.isPlainObject(data)) {
if (isNumber(data.left)) {
cropBox.left = data.left;
}
if (isNumber(data.top)) {
cropBox.top = data.top;
}
if (isNumber(data.width)) {
isWidthChanged = true;
cropBox.width = data.width;
}
if (isNumber(data.height)) {
isHeightChanged = true;
cropBox.height = data.height;
}
if (aspectRatio) {
if (isWidthChanged) {
cropBox.height = cropBox.width / aspectRatio;
} else if (isHeightChanged) {
cropBox.width = cropBox.height * aspectRatio;
}
}
this.renderCropBox();
}
},
/**
* Get a canvas drawn the cropped image
*
* @param {Object} options (optional)
* @return {HTMLCanvasElement} canvas
*/
getCroppedCanvas: function (options) {
var originalWidth;
var originalHeight;
var canvasWidth;
var canvasHeight;
var scaledWidth;
var scaledHeight;
var scaledRatio;
var aspectRatio;
var canvas;
var context;
var data;
if (!this.isBuilt || !SUPPORT_CANVAS) {
return;
}
if (!this.isCropped) {
return getSourceCanvas(this.$clone[0], this.image);
}
if (!$.isPlainObject(options)) {
options = {};
}
data = this.getData();
originalWidth = data.width;
originalHeight = data.height;
aspectRatio = originalWidth / originalHeight;
if ($.isPlainObject(options)) {
scaledWidth = options.width;
scaledHeight = options.height;
if (scaledWidth) {
scaledHeight = scaledWidth / aspectRatio;
scaledRatio = scaledWidth / originalWidth;
} else if (scaledHeight) {
scaledWidth = scaledHeight * aspectRatio;
scaledRatio = scaledHeight / originalHeight;
}
}
// The canvas element will use `Math.floor` on a float number, so floor first
canvasWidth = floor(scaledWidth || originalWidth);
canvasHeight = floor(scaledHeight || originalHeight);
canvas = $('<canvas>')[0];
canvas.width = canvasWidth;
canvas.height = canvasHeight;
context = canvas.getContext('2d');
if (options.fillColor) {
context.fillStyle = options.fillColor;
context.fillRect(0, 0, canvasWidth, canvasHeight);
}
// https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D.drawImage
context.drawImage.apply(context, (function () {
var source = getSourceCanvas(this.$clone[0], this.image);
var sourceWidth = source.width;
var sourceHeight = source.height;
var canvas = this.canvas;
var params = [source];
// Source canvas
var srcX = data.x + canvas.naturalWidth * (abs(data.scaleX || 1) - 1) / 2;
var srcY = data.y + canvas.naturalHeight * (abs(data.scaleY || 1) - 1) / 2;
var srcWidth;
var srcHeight;
// Destination canvas
var dstX;
var dstY;
var dstWidth;
var dstHeight;
if (srcX <= -originalWidth || srcX > sourceWidth) {
srcX = srcWidth = dstX = dstWidth = 0;
} else if (srcX <= 0) {
dstX = -srcX;
srcX = 0;
srcWidth = dstWidth = min(sourceWidth, originalWidth + srcX);
} else if (srcX <= sourceWidth) {
dstX = 0;
srcWidth = dstWidth = min(originalWidth, sourceWidth - srcX);
}
if (srcWidth <= 0 || srcY <= -originalHeight || srcY > sourceHeight) {
srcY = srcHeight = dstY = dstHeight = 0;
} else if (srcY <= 0) {
dstY = -srcY;
srcY = 0;
srcHeight = dstHeight = min(sourceHeight, originalHeight + srcY);
} else if (srcY <= sourceHeight) {
dstY = 0;
srcHeight = dstHeight = min(originalHeight, sourceHeight - srcY);
}
// All the numerical parameters should be integer for `drawImage` (#476)
params.push(floor(srcX), floor(srcY), floor(srcWidth), floor(srcHeight));
// Scale destination sizes
if (scaledRatio) {
dstX *= scaledRatio;
dstY *= scaledRatio;
dstWidth *= scaledRatio;
dstHeight *= scaledRatio;
}
// Avoid "IndexSizeError" in IE and Firefox
if (dstWidth > 0 && dstHeight > 0) {
params.push(floor(dstX), floor(dstY), floor(dstWidth), floor(dstHeight));
}
return params;
}).call(this));
return canvas;
},
/**
* Change the aspect ratio of the crop box
*
* @param {Number} aspectRatio
*/
setAspectRatio: function (aspectRatio) {
var options = this.options;
if (!this.isDisabled && !isUndefined(aspectRatio)) {
// 0 -> NaN
options.aspectRatio = max(0, aspectRatio) || NaN;
if (this.isBuilt) {
this.initCropBox();
if (this.isCropped) {
this.renderCropBox();
}
}
}
},
/**
* Change the drag mode
*
* @param {String} mode (optional)
*/
setDragMode: function (mode) {
var options = this.options;
var croppable;
var movable;
if (this.isLoaded && !this.isDisabled) {
croppable = mode === ACTION_CROP;
movable = options.movable && mode === ACTION_MOVE;
mode = (croppable || movable) ? mode : ACTION_NONE;
this.$dragBox.
data(DATA_ACTION, mode).
toggleClass(CLASS_CROP, croppable).
toggleClass(CLASS_MOVE, movable);
if (!options.cropBoxMovable) {
// Sync drag mode to crop box when it is not movable(#300)
this.$face.
data(DATA_ACTION, mode).
toggleClass(CLASS_CROP, croppable).
toggleClass(CLASS_MOVE, movable);
}
}
}
};
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