import { isArray, isNumber, map } from '../core/util';
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import Path from '../graphic/Path';
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import TSpan from '../graphic/TSpan';
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export function normalizeLineDash(lineType: any, lineWidth?: number): number[] | false {
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if (!lineType || lineType === 'solid' || !(lineWidth > 0)) {
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return null;
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}
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return lineType === 'dashed'
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? [4 * lineWidth, 2 * lineWidth]
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: lineType === 'dotted'
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? [lineWidth]
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: isNumber(lineType)
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? [lineType] : isArray(lineType) ? lineType : null;
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}
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export function getLineDash(el: Path | TSpan): [number[] | false, number] {
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const style = el.style;
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let lineDash = style.lineDash && style.lineWidth > 0 && normalizeLineDash(style.lineDash, style.lineWidth);
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let lineDashOffset = style.lineDashOffset;
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if (lineDash) {
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const lineScale = (style.strokeNoScale && el.getLineScale) ? el.getLineScale() : 1;
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if (lineScale && lineScale !== 1) {
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lineDash = map(lineDash, function (rawVal) {
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return rawVal / lineScale;
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});
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lineDashOffset /= lineScale;
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}
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}
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return [lineDash, lineDashOffset];
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}
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