bd028579
 易尊强
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function isSafeNum(num) {
return isFinite(num);
}
export function createLinearGradient(ctx, obj, rect) {
var x = obj.x == null ? 0 : obj.x;
var x2 = obj.x2 == null ? 1 : obj.x2;
var y = obj.y == null ? 0 : obj.y;
var y2 = obj.y2 == null ? 0 : obj.y2;
if (!obj.global) {
x = x * rect.width + rect.x;
x2 = x2 * rect.width + rect.x;
y = y * rect.height + rect.y;
y2 = y2 * rect.height + rect.y;
}
x = isSafeNum(x) ? x : 0;
x2 = isSafeNum(x2) ? x2 : 1;
y = isSafeNum(y) ? y : 0;
y2 = isSafeNum(y2) ? y2 : 0;
var canvasGradient = ctx.createLinearGradient(x, y, x2, y2);
return canvasGradient;
}
export function createRadialGradient(ctx, obj, rect) {
var width = rect.width;
var height = rect.height;
var min = Math.min(width, height);
var x = obj.x == null ? 0.5 : obj.x;
var y = obj.y == null ? 0.5 : obj.y;
var r = obj.r == null ? 0.5 : obj.r;
if (!obj.global) {
x = x * width + rect.x;
y = y * height + rect.y;
r = r * min;
}
x = isSafeNum(x) ? x : 0.5;
y = isSafeNum(y) ? y : 0.5;
r = r >= 0 && isSafeNum(r) ? r : 0.5;
var canvasGradient = ctx.createRadialGradient(x, y, 0, x, y, r);
return canvasGradient;
}
export function getCanvasGradient(ctx, obj, rect) {
var canvasGradient = obj.type === 'radial'
? createRadialGradient(ctx, obj, rect)
: createLinearGradient(ctx, obj, rect);
var colorStops = obj.colorStops;
for (var i = 0; i < colorStops.length; i++) {
canvasGradient.addColorStop(colorStops[i].offset, colorStops[i].color);
}
return canvasGradient;
}
export function isClipPathChanged(clipPaths, prevClipPaths) {
if (clipPaths === prevClipPaths || (!clipPaths && !prevClipPaths)) {
return false;
}
if (!clipPaths || !prevClipPaths || (clipPaths.length !== prevClipPaths.length)) {
return true;
}
for (var i = 0; i < clipPaths.length; i++) {
if (clipPaths[i] !== prevClipPaths[i]) {
return true;
}
}
return false;
}
function parseInt10(val) {
return parseInt(val, 10);
}
export function getSize(root, whIdx, opts) {
var wh = ['width', 'height'][whIdx];
var cwh = ['clientWidth', 'clientHeight'][whIdx];
var plt = ['paddingLeft', 'paddingTop'][whIdx];
var prb = ['paddingRight', 'paddingBottom'][whIdx];
if (opts[wh] != null && opts[wh] !== 'auto') {
return parseFloat(opts[wh]);
}
var stl = document.defaultView.getComputedStyle(root);
return ((root[cwh] || parseInt10(stl[wh]) || parseInt10(root.style[wh]))
- (parseInt10(stl[plt]) || 0)
- (parseInt10(stl[prb]) || 0)) | 0;
}
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