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Merge pull request #166 from Coding/fs-module-refactor
don't open duplicate tab of same file
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,120 @@ | ||
| // 不可用的快捷键: | ||
| // http://stackoverflow.com/questions/7295508/javascript-capture-browser-shortcuts-ctrlt-n-w | ||
| import { normalizeKeys, keyEventToKeyCombination } from './helpers' | ||
|
|
||
| /* | ||
| 定义两个术语: | ||
| Key Combination: 键位组合，指的是一个快捷键组合，e.g. `ctrl+c` | ||
| Key Composition: 复合快捷键，指的是连续按几个快捷键组合，e.g. `ctrl+K,ctrl+F` | ||
| */ | ||
|
|
||
| class Keymapper { | ||
| static defaults = { | ||
| dispatchCommand: console.log || (f => f), | ||
| combinator: '+', | ||
| delimiter: ',', | ||
| wait: 500, | ||
| }; | ||
|
|
||
| constructor (opts) { | ||
| const options = { ...Keymapper.defaults, ...opts } | ||
| const { dispatchCommand, combinator, delimiter, wait } = options | ||
| this.dispatchCommand = dispatchCommand | ||
| this.combinator = combinator | ||
| this.delimiter = delimiter | ||
| this.wait = wait | ||
|
|
||
| this.keymaps = {} | ||
| this.keysRegistered = {} | ||
| this.lastTimeoutId = false | ||
| this.buffer = { | ||
| keys: [], | ||
| getDelimiter: () => this.delimiter, | ||
| reset () { | ||
| this.keys.length = 0 | ||
| }, | ||
| push (keyCombination) { | ||
| this.keys.push(keyCombination) | ||
| }, | ||
| read () { | ||
| return this.keys.join(this.getDelimiter()) | ||
| } | ||
| } | ||
|
|
||
| window.addEventListener('keydown', this.handleKeyEvent) | ||
| Object.defineProperty(Keymapper, '$$singleton', { value: this }) | ||
| } | ||
|
|
||
|
|
||
| handleKeyEvent = (e) => { | ||
| const isComboPending = Boolean(this.lastTimeoutId) | ||
| // ignore if only modifier is pressed | ||
| if (['Meta', 'OS', 'Control', 'Shift', 'Alt'].indexOf(e.key) > -1) return | ||
| const keyCombination = keyEventToKeyCombination(e, this.combinator) | ||
| const keyCombinationState = this.keysRegistered[keyCombination] | ||
| if (keyCombinationState === undefined && !isComboPending) return | ||
|
|
||
| this.buffer.push(keyCombination) | ||
|
|
||
| if (this.lastTimeoutId) { | ||
| clearTimeout(this.lastTimeoutId) | ||
| this.lastTimeoutId = false | ||
| } | ||
|
|
||
| if (keyCombinationState == 1) { | ||
| // hotkey should stop propagate | ||
| e.preventDefault(); e.stopPropagation() | ||
| this.consumeBuffer() | ||
| } | ||
|
|
||
| if (keyCombinationState > 1 || isComboPending) { | ||
| e.preventDefault(); e.stopPropagation() | ||
| this.lastTimeoutId = setTimeout(() => this.consumeBuffer(), this.wait) | ||
| } | ||
| } | ||
|
|
||
| consumeBuffer () { | ||
| this.lastTimeoutId = false | ||
| const keys = this.buffer.read() | ||
| if (keys) this.dispatchCommand(this.keymaps[keys]) | ||
| this.buffer.reset() | ||
| } | ||
|
|
||
| map (keys, command) { | ||
| if (typeof keys !== 'string' || typeof command !== 'string') return | ||
| const normalizedKeys = normalizeKeys(keys, this.combinator, this.delimiter) | ||
| this.registerKeys(normalizedKeys) | ||
| this.registerKeymaps(normalizedKeys, command) | ||
| } | ||
|
|
||
| registerKeys (keys) { | ||
| const keyComps = keys.split(this.delimiter) | ||
| this.keysRegistered[keyComps[0]] = keyComps.length | ||
| } | ||
|
|
||
| unregisterKeys (keys) { | ||
| const keyComps = keys.split(this.delimiter) | ||
| delete this.keysRegistered[keyComps[0]] | ||
| } | ||
|
|
||
| registerKeymaps (keys, command) { | ||
| this.keymaps[keys] = command | ||
| } | ||
|
|
||
| loadKeymaps (keymaps) { | ||
| if (typeof keymaps === 'string') { | ||
| try { keymaps = JSON.parse(keymaps) } catch (e) { throw Error('Keymapper: Invalid keymaps description. Fail to parse JSON to object.') } | ||
| } | ||
| if (!keymaps || typeof keymaps !== 'object') return | ||
|
|
||
| Object.keys(keymaps).forEach((keys) => { | ||
| if (typeof keymaps[keys] === 'string') { | ||
| this.map(keys, keymaps[keys]) | ||
| } else { | ||
| throw Error('Keymapper: Invalid keymaps description.') | ||
| } | ||
| }) | ||
| } | ||
| } | ||
|
|
||
| export default Keymapper |
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