render: function () {
this.initContainer();
this.initCanvas();
this.initCropBox();
this.renderCanvas();
if (this.isCropped) {
this.renderCropBox();
}
},
initContainer: function () {
var options = this.options;
var $this = this.$element;
var $container = this.$container;
var $cropper = this.$cropper;
$cropper.addClass(CLASS_HIDDEN);
$this.removeClass(CLASS_HIDDEN);
$cropper.css((this.container = {
width: max($container.width(), num(options.minContainerWidth) || 200),
height: max($container.height(), num(options.minContainerHeight) || 100)
}));
$this.addClass(CLASS_HIDDEN);
$cropper.removeClass(CLASS_HIDDEN);
},
// Canvas (image wrapper)
initCanvas: function () {
var viewMode = this.options.viewMode;
var container = this.container;
var containerWidth = container.width;
var containerHeight = container.height;
var image = this.image;
var imageNaturalWidth = image.naturalWidth;
var imageNaturalHeight = image.naturalHeight;
var is90Degree = abs(image.rotate) === 90;
var naturalWidth = is90Degree ? imageNaturalHeight : imageNaturalWidth;
var naturalHeight = is90Degree ? imageNaturalWidth : imageNaturalHeight;
var aspectRatio = naturalWidth / naturalHeight;
var canvasWidth = containerWidth;
var canvasHeight = containerHeight;
var canvas;
if (containerHeight * aspectRatio > containerWidth) {
if (viewMode === 3) {
canvasWidth = containerHeight * aspectRatio;
} else {
canvasHeight = containerWidth / aspectRatio;
}
} else {
if (viewMode === 3) {
canvasHeight = containerWidth / aspectRatio;
} else {
canvasWidth = containerHeight * aspectRatio;
}
}
canvas = {
naturalWidth: naturalWidth,
naturalHeight: naturalHeight,
aspectRatio: aspectRatio,
width: canvasWidth,
height: canvasHeight
};
canvas.oldLeft = canvas.left = (containerWidth - canvasWidth) / 2;
canvas.oldTop = canvas.top = (containerHeight - canvasHeight) / 2;
this.canvas = canvas;
this.isLimited = (viewMode === 1 || viewMode === 2);
this.limitCanvas(true, true);
this.initialImage = $.extend({}, image);
this.initialCanvas = $.extend({}, canvas);
},
limitCanvas: function (isSizeLimited, isPositionLimited) {
var options = this.options;
var viewMode = options.viewMode;
var container = this.container;
var containerWidth = container.width;
var containerHeight = container.height;
var canvas = this.canvas;
var aspectRatio = canvas.aspectRatio;
var cropBox = this.cropBox;
var isCropped = this.isCropped && cropBox;
var minCanvasWidth;
var minCanvasHeight;
var newCanvasLeft;
var newCanvasTop;
if (isSizeLimited) {
minCanvasWidth = num(options.minCanvasWidth) || 0;
minCanvasHeight = num(options.minCanvasHeight) || 0;
if (viewMode) {
if (viewMode > 1) {
minCanvasWidth = max(minCanvasWidth, containerWidth);
minCanvasHeight = max(minCanvasHeight, containerHeight);
if (viewMode === 3) {
if (minCanvasHeight * aspectRatio > minCanvasWidth) {
minCanvasWidth = minCanvasHeight * aspectRatio;
} else {
minCanvasHeight = minCanvasWidth / aspectRatio;
}
}
} else {
if (minCanvasWidth) {
minCanvasWidth = max(minCanvasWidth, isCropped ? cropBox.width : 0);
} else if (minCanvasHeight) {
minCanvasHeight = max(minCanvasHeight, isCropped ? cropBox.height : 0);
} else if (isCropped) {
minCanvasWidth = cropBox.width;
minCanvasHeight = cropBox.height;
if (minCanvasHeight * aspectRatio > minCanvasWidth) {
minCanvasWidth = minCanvasHeight * aspectRatio;
} else {
minCanvasHeight = minCanvasWidth / aspectRatio;
}
}
}
}
if (minCanvasWidth && minCanvasHeight) {
if (minCanvasHeight * aspectRatio > minCanvasWidth) {
minCanvasHeight = minCanvasWidth / aspectRatio;
} else {
minCanvasWidth = minCanvasHeight * aspectRatio;
}
} else if (minCanvasWidth) {
minCanvasHeight = minCanvasWidth / aspectRatio;
} else if (minCanvasHeight) {
minCanvasWidth = minCanvasHeight * aspectRatio;
}
canvas.minWidth = minCanvasWidth;
canvas.minHeight = minCanvasHeight;
canvas.maxWidth = Infinity;
canvas.maxHeight = Infinity;
}
if (isPositionLimited) {
if (viewMode) {
newCanvasLeft = containerWidth - canvas.width;
newCanvasTop = containerHeight - canvas.height;
canvas.minLeft = min(0, newCanvasLeft);
canvas.minTop = min(0, newCanvasTop);
canvas.maxLeft = max(0, newCanvasLeft);
canvas.maxTop = max(0, newCanvasTop);
if (isCropped && this.isLimited) {
canvas.minLeft = min(
cropBox.left,
cropBox.left + cropBox.width - canvas.width
);
canvas.minTop = min(
cropBox.top,
cropBox.top + cropBox.height - canvas.height
);
canvas.maxLeft = cropBox.left;
canvas.maxTop = cropBox.top;
if (viewMode === 2) {
if (canvas.width >= containerWidth) {
canvas.minLeft = min(0, newCanvasLeft);
canvas.maxLeft = max(0, newCanvasLeft);
}
if (canvas.height >= containerHeight) {
canvas.minTop = min(0, newCanvasTop);
canvas.maxTop = max(0, newCanvasTop);
}
}
}
} else {
canvas.minLeft = -canvas.width;
canvas.minTop = -canvas.height;
canvas.maxLeft = containerWidth;
canvas.maxTop = containerHeight;
}
}
},
renderCanvas: function (isChanged) {
var canvas = this.canvas;
var image = this.image;
var rotate = image.rotate;
var naturalWidth = image.naturalWidth;
var naturalHeight = image.naturalHeight;
var aspectRatio;
var rotated;
if (this.isRotated) {
this.isRotated = false;
// Computes rotated sizes with image sizes
rotated = getRotatedSizes({
width: image.width,
height: image.height,
degree: rotate
});
aspectRatio = rotated.width / rotated.height;
if (aspectRatio !== canvas.aspectRatio) {
canvas.left -= (rotated.width - canvas.width) / 2;
canvas.top -= (rotated.height - canvas.height) / 2;
canvas.width = rotated.width;
canvas.height = rotated.height;
canvas.aspectRatio = aspectRatio;
canvas.naturalWidth = naturalWidth;
canvas.naturalHeight = naturalHeight;
// Computes rotated sizes with natural image sizes
if (rotate % 180) {
rotated = getRotatedSizes({
width: naturalWidth,
height: naturalHeight,
degree: rotate
});
canvas.naturalWidth = rotated.width;
canvas.naturalHeight = rotated.height;
}
this.limitCanvas(true, false);
}
}
if (canvas.width > canvas.maxWidth || canvas.width < canvas.minWidth) {
canvas.left = canvas.oldLeft;
}
if (canvas.height > canvas.maxHeight || canvas.height < canvas.minHeight) {
canvas.top = canvas.oldTop;
}
canvas.width = min(max(canvas.width, canvas.minWidth), canvas.maxWidth);
canvas.height = min(max(canvas.height, canvas.minHeight), canvas.maxHeight);
this.limitCanvas(false, true);
canvas.oldLeft = canvas.left = min(max(canvas.left, canvas.minLeft), canvas.maxLeft);
canvas.oldTop = canvas.top = min(max(canvas.top, canvas.minTop), canvas.maxTop);
this.$canvas.css({
width: canvas.width,
height: canvas.height,
left: canvas.left,
top: canvas.top
});
this.renderImage();
if (this.isCropped && this.isLimited) {
this.limitCropBox(true, true);
}
if (isChanged) {
this.output();
}
},
renderImage: function (isChanged) {
var canvas = this.canvas;
var image = this.image;
var reversed;
if (image.rotate) {
reversed = getRotatedSizes({
width: canvas.width,
height: canvas.height,
degree: image.rotate,
aspectRatio: image.aspectRatio
}, true);
}
$.extend(image, reversed ? {
width: reversed.width,
height: reversed.height,
left: (canvas.width - reversed.width) / 2,
top: (canvas.height - reversed.height) / 2
} : {
width: canvas.width,
height: canvas.height,
left: 0,
top: 0
});
this.$clone.css({
width: image.width,
height: image.height,
marginLeft: image.left,
marginTop: image.top,
transform: getTransform(image)
});
if (isChanged) {
this.output();
}
},
initCropBox: function () {
var options = this.options;
var canvas = this.canvas;
var aspectRatio = options.aspectRatio;
var autoCropArea = num(options.autoCropArea) || 0.8;
var cropBox = {
width: canvas.width,
height: canvas.height
};
if (aspectRatio) {
if (canvas.height * aspectRatio > canvas.width) {
cropBox.height = cropBox.width / aspectRatio;
} else {
cropBox.width = cropBox.height * aspectRatio;
}
}
this.cropBox = cropBox;
this.limitCropBox(true, true);
// Initialize auto crop area
cropBox.width = min(max(cropBox.width, cropBox.minWidth), cropBox.maxWidth);
cropBox.height = min(max(cropBox.height, cropBox.minHeight), cropBox.maxHeight);
// The width of auto crop area must large than "minWidth", and the height too. (#164)
cropBox.width = max(cropBox.minWidth, cropBox.width * autoCropArea);
cropBox.height = max(cropBox.minHeight, cropBox.height * autoCropArea);
cropBox.oldLeft = cropBox.left = canvas.left + (canvas.width - cropBox.width) / 2;
cropBox.oldTop = cropBox.top = canvas.top + (canvas.height - cropBox.height) / 2;
this.initialCropBox = $.extend({}, cropBox);
},
limitCropBox: function (isSizeLimited, isPositionLimited) {
var options = this.options;
var aspectRatio = options.aspectRatio;
var container = this.container;
var containerWidth = container.width;
var containerHeight = container.height;
var canvas = this.canvas;
var cropBox = this.cropBox;
var isLimited = this.isLimited;
var minCropBoxWidth;
var minCropBoxHeight;
var maxCropBoxWidth;
var maxCropBoxHeight;
if (isSizeLimited) {
minCropBoxWidth = num(options.minCropBoxWidth) || 0;
minCropBoxHeight = num(options.minCropBoxHeight) || 0;
// The min/maxCropBoxWidth/Height must be less than containerWidth/Height
minCropBoxWidth = min(minCropBoxWidth, containerWidth);
minCropBoxHeight = min(minCropBoxHeight, containerHeight);
maxCropBoxWidth = min(containerWidth, isLimited ? canvas.width : containerWidth);
maxCropBoxHeight = min(containerHeight, isLimited ? canvas.height : containerHeight);
if (aspectRatio) {
if (minCropBoxWidth && minCropBoxHeight) {
if (minCropBoxHeight * aspectRatio > minCropBoxWidth) {
minCropBoxHeight = minCropBoxWidth / aspectRatio;
} else {
minCropBoxWidth = minCropBoxHeight * aspectRatio;
}
} else if (minCropBoxWidth) {
minCropBoxHeight = minCropBoxWidth / aspectRatio;
} else if (minCropBoxHeight) {
minCropBoxWidth = minCropBoxHeight * aspectRatio;
}
if (maxCropBoxHeight * aspectRatio > maxCropBoxWidth) {
maxCropBoxHeight = maxCropBoxWidth / aspectRatio;
} else {
maxCropBoxWidth = maxCropBoxHeight * aspectRatio;
}
}
// The minWidth/Height must be less than maxWidth/Height
cropBox.minWidth = min(minCropBoxWidth, maxCropBoxWidth);
cropBox.minHeight = min(minCropBoxHeight, maxCropBoxHeight);
cropBox.maxWidth = maxCropBoxWidth;
cropBox.maxHeight = maxCropBoxHeight;
}
if (isPositionLimited) {
if (isLimited) {
cropBox.minLeft = max(0, canvas.left);
cropBox.minTop = max(0, canvas.top);
cropBox.maxLeft = min(containerWidth, canvas.left + canvas.width) - cropBox.width;
cropBox.maxTop = min(containerHeight, canvas.top + canvas.height) - cropBox.height;
} else {
cropBox.minLeft = 0;
cropBox.minTop = 0;
cropBox.maxLeft = containerWidth - cropBox.width;
cropBox.maxTop = containerHeight - cropBox.height;
}
}
},
renderCropBox: function () {
var options = this.options;
var container = this.container;
var containerWidth = container.width;
var containerHeight = container.height;
var cropBox = this.cropBox;
if (cropBox.width > cropBox.maxWidth || cropBox.width < cropBox.minWidth) {
cropBox.left = cropBox.oldLeft;
}
if (cropBox.height > cropBox.maxHeight || cropBox.height < cropBox.minHeight) {
cropBox.top = cropBox.oldTop;
}
cropBox.width = min(max(cropBox.width, cropBox.minWidth), cropBox.maxWidth);
cropBox.height = min(max(cropBox.height, cropBox.minHeight), cropBox.maxHeight);
this.limitCropBox(false, true);
cropBox.oldLeft = cropBox.left = min(max(cropBox.left, cropBox.minLeft), cropBox.maxLeft);
cropBox.oldTop = cropBox.top = min(max(cropBox.top, cropBox.minTop), cropBox.maxTop);
if (options.movable && options.cropBoxMovable) {
// Turn to move the canvas when the crop box is equal to the container
this.$face.data(DATA_ACTION, (cropBox.width === containerWidth && cropBox.height === containerHeight) ? ACTION_MOVE : ACTION_ALL);
}
this.$cropBox.css({
width: cropBox.width,
height: cropBox.height,
left: cropBox.left,
top: cropBox.top
});
if (this.isCropped && this.isLimited) {
this.limitCanvas(true, true);
}
if (!this.isDisabled) {
this.output();
}
},
output: function () {
this.preview();
if (this.isCompleted) {
this.trigger(EVENT_CROP, this.getData());
} else if (!this.isBuilt) {
// Only trigger one crop event before complete
this.$element.one(EVENT_BUILT, $.proxy(function () {
this.trigger(EVENT_CROP, this.getData());
}, this));
}
},
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