102 lines
1.9 KiB
JavaScript
102 lines
1.9 KiB
JavaScript
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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));
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