37 lines
723 B
JavaScript
37 lines
723 B
JavaScript
// vim: set ts=2 sw=2 et tw=80:
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const history = {
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paths: []
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}
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history.pop = () => {
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if (history.paths.length == 0) return;
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return history.paths.pop();
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};
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history.initializeNewPath = () => {
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history.paths.push([]);
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};
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history.push = (stroke) => {
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if (!stroke || !stroke instanceof Stroke) {
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throw new Error(JSON.stringify(stroke) + ' is not a Stroke instance');
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}
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history.paths[history.paths.length - 1].push(stroke);
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return history.paths[history.paths.length - 1];
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}
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history.clear = () => {
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history.paths = [];
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};
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class Stroke {
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constructor(brushName, strokeStyle, x, y) {
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this.brushName = brushName;
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this.strokeStyle = strokeStyle;
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this.offsetX = x;
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this.offsetY = y;
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}
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}
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