52 lines
1.1 KiB
JavaScript
52 lines
1.1 KiB
JavaScript
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function canonicalKey(event) {
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let name = [];
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if (event.altKey) name.push('M')
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if (event.ctrlKey) name.push('C')
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if (event.metaKey) name.push('H')
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if (event.shiftKey) name.push('S')
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name.push(event.key)
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return name.join('-')
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}
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function handleKeyDown(editor, event) {
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if (event.repeating) return true;
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const key = canonicalKey(event)
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console.log('Key down ' + key)
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if (this.keys.hasOwnProperty(key)) {
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const action = this.keys[key]
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if (editor.hasOwnProperty(action)) {
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console.log('Calling action ' + action)
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return editor[action](event)
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} else {
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console.warn('Unknown action on editor: ' + action)
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}
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}
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return true
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}
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function mapKey(key, action) {
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if (this.keys.hasOwnProperty(key)) {
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console.warn(`Re-defining ${key} to call ${action}`)
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} else {
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console.log(`Defining ${key} to call ${action}`)
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}
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this.keys[key] = action
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}
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function Keymap() {
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return {
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keys: {},
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mapKey,
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handleKey: handleKeyDown
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}
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}
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export default Keymap
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