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// DOMRect |
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(function (global) { |
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function number(v) { |
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return v === undefined ? 0 : Number(v); |
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} |
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function different(u, v) { |
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return u !== v && !(isNaN(u) && isNaN(v)); |
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} |
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function DOMRect(xArg, yArg, wArg, hArg) { |
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var x, y, width, height, left, right, top, bottom; |
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x = number(xArg); |
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y = number(yArg); |
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width = number(wArg); |
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height = number(hArg); |
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Object.defineProperties(this, { |
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x: { |
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get: function () { return x; }, |
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set: function (newX) { |
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if (different(x, newX)) { |
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x = newX; |
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left = right = undefined; |
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} |
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}, |
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enumerable: true |
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}, |
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y: { |
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get: function () { return y; }, |
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set: function (newY) { |
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if (different(y, newY)) { |
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y = newY; |
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top = bottom = undefined; |
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} |
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}, |
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enumerable: true |
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}, |
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width: { |
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get: function () { return width; }, |
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set: function (newWidth) { |
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if (different(width, newWidth)) { |
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width = newWidth; |
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left = right = undefined; |
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} |
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}, |
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enumerable: true |
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}, |
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height: { |
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get: function () { return height; }, |
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set: function (newHeight) { |
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if (different(height, newHeight)) { |
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height = newHeight; |
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top = bottom = undefined; |
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} |
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}, |
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enumerable: true |
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}, |
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left: { |
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get: function () { |
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if (left === undefined) { |
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left = x + Math.min(0, width); |
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} |
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return left; |
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}, |
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enumerable: true |
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}, |
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right: { |
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get: function () { |
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if (right === undefined) { |
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right = x + Math.max(0, width); |
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} |
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return right; |
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}, |
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enumerable: true |
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}, |
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top: { |
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get: function () { |
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if (top === undefined) { |
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top = y + Math.min(0, height); |
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} |
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return top; |
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}, |
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enumerable: true |
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}, |
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bottom: { |
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get: function () { |
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if (bottom === undefined) { |
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bottom = y + Math.max(0, height); |
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} |
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return bottom; |
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}, |
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enumerable: true |
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} |
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}); |
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} |
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global.DOMRect = DOMRect; |
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}(self)); |