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2c211ba504
This was cool, but it's really hard to optimize the keymap with this feature because we never know if a keystroke will match against a binding set with a function, which will force us to always consider this binding set against every key event.
49 lines
1.6 KiB
CoffeeScript
49 lines
1.6 KiB
CoffeeScript
$ = require 'jquery'
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_ = require 'underscore'
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fs = require 'fs'
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Specificity = require 'specificity'
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PEG = require 'pegjs'
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module.exports =
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class BindingSet
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selector: null
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commandsByKeystrokes: null
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commandForEvent: null
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parser: null
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constructor: (@selector, commandsByKeystrokes, @index) ->
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@parser = PEG.buildParser(fs.read(require.resolve 'keystroke-pattern.pegjs'))
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@specificity = Specificity(@selector)
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@commandsByKeystrokes = @normalizeCommandsByKeystrokes(commandsByKeystrokes)
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commandForEvent: (event) ->
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for keystrokes, command of @commandsByKeystrokes
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return command if event.keystrokes == keystrokes
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null
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matchesKeystrokePrefix: (event) ->
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eventKeystrokes = event.keystrokes.split(' ')
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for keystrokes, command of @commandsByKeystrokes
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bindingKeystrokes = keystrokes.split(' ')
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continue unless eventKeystrokes.length < bindingKeystrokes.length
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return true if _.isEqual(eventKeystrokes, bindingKeystrokes[0...eventKeystrokes.length])
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false
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normalizeCommandsByKeystrokes: (commandsByKeystrokes) ->
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normalizedCommandsByKeystrokes = {}
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for keystrokes, command of commandsByKeystrokes
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normalizedCommandsByKeystrokes[@normalizeKeystrokes(keystrokes)] = command
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normalizedCommandsByKeystrokes
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normalizeKeystrokes: (keystrokes) ->
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normalizedKeystrokes = keystrokes.split(/\s+/).map (keystroke) =>
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@normalizeKeystroke(keystroke)
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normalizedKeystrokes.join(' ')
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normalizeKeystroke: (keystroke) ->
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keys = @parser.parse(keystroke)
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modifiers = keys[0...-1]
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modifiers.sort()
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[modifiers..., _.last(keys)].join('-')
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