72 lines
1.8 KiB
TypeScript
72 lines
1.8 KiB
TypeScript
export default interface Key {
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key: string;
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shiftKey?: boolean;
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ctrlKey?: boolean;
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altKey?: boolean;
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metaKey?: boolean;
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}
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const modifiedKeyName = (name: string): string => {
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if (name === ' ') {
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return 'Space';
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}
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if (name.length === 1) {
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return name;
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} else if (name === 'Escape') {
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return 'Esc';
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}
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return name;
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};
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export const fromKeyboardEvent = (e: KeyboardEvent): Key => {
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let key = modifiedKeyName(e.key);
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let shift = e.shiftKey;
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if (key.length === 1 && key.toUpperCase() === key.toLowerCase()) {
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// make shift false for symbols to enable key bindings by symbold keys.
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// But this limits key bindings by symbol keys with Shift (such as Shift+$>.
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shift = false;
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}
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return {
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key: modifiedKeyName(e.key),
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shiftKey: shift,
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ctrlKey: e.ctrlKey,
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altKey: e.altKey,
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metaKey: e.metaKey,
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};
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};
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export const fromMapKey = (key: string): Key => {
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if (key.startsWith('<') && key.endsWith('>')) {
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let inner = key.slice(1, -1);
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let shift = inner.includes('S-');
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let base = inner.slice(inner.lastIndexOf('-') + 1);
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if (shift && base.length === 1) {
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base = base.toUpperCase();
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} else if (!shift && base.length === 1) {
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base = base.toLowerCase();
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}
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return {
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key: base,
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shiftKey: inner.includes('S-'),
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ctrlKey: inner.includes('C-'),
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altKey: inner.includes('A-'),
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metaKey: inner.includes('M-'),
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};
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}
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return {
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key: key,
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shiftKey: key.toLowerCase() !== key,
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ctrlKey: false,
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altKey: false,
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metaKey: false,
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};
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};
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export const equals = (e1: Key, e2: Key): boolean => {
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return e1.key === e2.key &&
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e1.ctrlKey === e2.ctrlKey &&
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e1.metaKey === e2.metaKey &&
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e1.altKey === e2.altKey &&
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e1.shiftKey === e2.shiftKey;
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};
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