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84 lines
2.0 KiB
CoffeeScript
84 lines
2.0 KiB
CoffeeScript
{SoftTab, HardTab, PairedCharacter, SoftWrapIndent} = require './special-token-symbols'
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module.exports =
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class TokenIterator
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constructor: (line) ->
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@reset(line) if line?
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reset: (@line) ->
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@index = null
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@bufferStart = @line.startBufferColumn
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@bufferEnd = @bufferStart
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@screenStart = 0
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@screenEnd = 0
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@scopes = @line.openScopes.map (id) -> atom.grammars.scopeForId(id)
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@scopeStarts = @scopes.slice()
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@scopeEnds = []
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this
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next: ->
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{tags} = @line
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if @index?
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@index++
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@scopeEnds.length = 0
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@scopeStarts.length = 0
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@bufferStart = @bufferEnd
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@screenStart = @screenEnd
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else
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@index = 0
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while @index < tags.length
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tag = tags[@index]
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if tag < 0
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if tag % 2 is 0
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@scopeEnds.push(atom.grammars.scopeForId(tag + 1))
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@scopes.pop()
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else
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scope = atom.grammars.scopeForId(tag)
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@scopeStarts.push(scope)
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@scopes.push(scope)
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@index++
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else
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if @isHardTab()
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@screenEnd = @screenStart + tag
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@bufferEnd = @bufferStart + 1
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else if @isSoftWrapIndentation()
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@screenEnd = @screenStart + tag
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@bufferEnd = @bufferStart + 0
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else
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@screenEnd = @screenStart + tag
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@bufferEnd = @bufferStart + tag
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return true
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false
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getBufferStart: -> @bufferStart
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getBufferEnd: -> @bufferEnd
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getScreenStart: -> @screenStart
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getScreenEnd: -> @screenEnd
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getScopeStarts: -> @scopeStarts
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getScopeEnds: -> @scopeEnds
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getScopes: -> @scopes
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getText: ->
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@line.text.substring(@screenStart, @screenEnd)
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isSoftTab: ->
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@line.specialTokens[@index] is SoftTab
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isHardTab: ->
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@line.specialTokens[@index] is HardTab
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isSoftWrapIndentation: ->
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@line.specialTokens[@index] is SoftWrapIndent
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isPairedCharacter: ->
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@line.specialTokens[@index] is PairedCharacter
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isAtomic: ->
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@isSoftTab() or @isHardTab() or @isSoftWrapIndentation() or @isPairedCharacter()
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