80 lines
2.7 KiB
JavaScript
80 lines
2.7 KiB
JavaScript
function isSafeNum(num) {
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return isFinite(num);
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}
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export function createLinearGradient(ctx, obj, rect) {
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var x = obj.x == null ? 0 : obj.x;
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var x2 = obj.x2 == null ? 1 : obj.x2;
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var y = obj.y == null ? 0 : obj.y;
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var y2 = obj.y2 == null ? 0 : obj.y2;
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if (!obj.global) {
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x = x * rect.width + rect.x;
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x2 = x2 * rect.width + rect.x;
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y = y * rect.height + rect.y;
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y2 = y2 * rect.height + rect.y;
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}
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x = isSafeNum(x) ? x : 0;
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x2 = isSafeNum(x2) ? x2 : 1;
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y = isSafeNum(y) ? y : 0;
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y2 = isSafeNum(y2) ? y2 : 0;
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var canvasGradient = ctx.createLinearGradient(x, y, x2, y2);
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return canvasGradient;
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}
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export function createRadialGradient(ctx, obj, rect) {
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var width = rect.width;
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var height = rect.height;
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var min = Math.min(width, height);
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var x = obj.x == null ? 0.5 : obj.x;
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var y = obj.y == null ? 0.5 : obj.y;
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var r = obj.r == null ? 0.5 : obj.r;
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if (!obj.global) {
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x = x * width + rect.x;
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y = y * height + rect.y;
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r = r * min;
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}
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x = isSafeNum(x) ? x : 0.5;
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y = isSafeNum(y) ? y : 0.5;
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r = r >= 0 && isSafeNum(r) ? r : 0.5;
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var canvasGradient = ctx.createRadialGradient(x, y, 0, x, y, r);
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return canvasGradient;
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}
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export function getCanvasGradient(ctx, obj, rect) {
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var canvasGradient = obj.type === 'radial'
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? createRadialGradient(ctx, obj, rect)
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: createLinearGradient(ctx, obj, rect);
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var colorStops = obj.colorStops;
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for (var i = 0; i < colorStops.length; i++) {
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canvasGradient.addColorStop(colorStops[i].offset, colorStops[i].color);
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}
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return canvasGradient;
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}
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export function isClipPathChanged(clipPaths, prevClipPaths) {
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if (clipPaths === prevClipPaths || (!clipPaths && !prevClipPaths)) {
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return false;
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}
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if (!clipPaths || !prevClipPaths || (clipPaths.length !== prevClipPaths.length)) {
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return true;
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}
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for (var i = 0; i < clipPaths.length; i++) {
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if (clipPaths[i] !== prevClipPaths[i]) {
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return true;
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}
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}
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return false;
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}
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function parseInt10(val) {
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return parseInt(val, 10);
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}
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export function getSize(root, whIdx, opts) {
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var wh = ['width', 'height'][whIdx];
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var cwh = ['clientWidth', 'clientHeight'][whIdx];
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var plt = ['paddingLeft', 'paddingTop'][whIdx];
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var prb = ['paddingRight', 'paddingBottom'][whIdx];
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if (opts[wh] != null && opts[wh] !== 'auto') {
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return parseFloat(opts[wh]);
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}
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var stl = document.defaultView.getComputedStyle(root);
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return ((root[cwh] || parseInt10(stl[wh]) || parseInt10(root.style[wh]))
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- (parseInt10(stl[plt]) || 0)
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- (parseInt10(stl[prb]) || 0)) | 0;
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}
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