Xiaohan-Tian
50 lines
1.7 KiB
TypeScript
50 lines
1.7 KiB
TypeScript
import { KGCore } from '../core/KGCore';
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import { ChangeLoopSettingsCommand } from '../core/commands';
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/**
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* Toggle the loop mode on/off with proper validation.
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* When enabling loop mode:
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* - If loop range is [0, 0], sets it to the entire song [0, maxBars]
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* - Validates that loop range is within [0, maxBars]
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* Uses the command pattern for undo/redo support.
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*
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* @param currentIsLooping Current loop mode state
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* @param currentLoopingRange Current loop range [startBar, endBar]
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* @param maxBars Maximum number of bars in the project
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*/
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export const toggleLoop = (
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currentIsLooping: boolean,
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currentLoopingRange: [number, number],
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maxBars: number
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): void => {
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const newLoopingState = !currentIsLooping;
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let newLoopingRange = currentLoopingRange;
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// When enabling loop, validate and set the loop range
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if (newLoopingState) {
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const currentRange = currentLoopingRange;
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const projectMaxBars = maxBars;
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// If range is [0, 0], set it to the entire song
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if (currentRange[0] === 0 && currentRange[1] === 0) {
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newLoopingRange = [0, projectMaxBars] as [number, number];
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} else {
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// Validate range is within [0, maxBars]
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const validatedStart = Math.max(0, Math.min(currentRange[0], projectMaxBars));
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const validatedEnd = Math.max(0, Math.min(currentRange[1], projectMaxBars));
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// If range changed, update it
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if (validatedStart !== currentRange[0] || validatedEnd !== currentRange[1]) {
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newLoopingRange = [validatedStart, validatedEnd] as [number, number];
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}
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}
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}
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// Execute command for undo/redo support
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const command = new ChangeLoopSettingsCommand({
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isLooping: newLoopingState,
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loopingRange: newLoopingRange
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});
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KGCore.instance().executeCommand(command);
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};
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