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60 lines
1.6 KiB
CoffeeScript
60 lines
1.6 KiB
CoffeeScript
_ = require 'underscore-plus'
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fs = require 'fs-plus'
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{specificity} = require 'clear-cut'
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### Internal ###
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module.exports =
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class KeyBinding
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@parser: null
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@currentIndex: 1
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@specificities: null
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@calculateSpecificity: (selector) ->
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@specificities ?= {}
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value = @specificities[selector]
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unless value?
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value = specificity(selector)
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@specificities[selector] = value
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value
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@normalizeKeystroke: (keystroke) ->
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normalizedKeystroke = keystroke.split(/\s+/).map (keystroke) =>
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keys = @parseKeystroke(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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normalizedKeystroke.join(' ')
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@parseKeystroke: (keystroke) ->
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unless @parser?
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try
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@parser = require './keystroke-pattern'
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catch
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keystrokePattern = fs.readFileSync(require.resolve('./keystroke-pattern.pegjs'), 'utf8')
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PEG = require 'pegjs'
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@parser = PEG.buildParser(keystrokePattern)
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@parser.parse(keystroke)
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constructor: (source, command, keystroke, selector) ->
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@source = source
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@command = command
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@keystroke = KeyBinding.normalizeKeystroke(keystroke)
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@selector = selector.replace(/!important/g, '')
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@specificity = KeyBinding.calculateSpecificity(selector)
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@index = KeyBinding.currentIndex++
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matches: (keystroke) ->
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multiKeystroke = /\s/.test keystroke
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if multiKeystroke
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keystroke == @keystroke
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else
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keystroke.split(' ')[0] == @keystroke.split(' ')[0]
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compare: (keyBinding) ->
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if keyBinding.specificity == @specificity
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keyBinding.index - @index
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else
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keyBinding.specificity - @specificity
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