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61 lines
1.3 KiB
CoffeeScript
61 lines
1.3 KiB
CoffeeScript
Range = require 'range'
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Point = require 'point'
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module.exports =
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class Fold
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@idCounter: 1
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displayBuffer: null
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startRow: null
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endRow: null
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constructor: (@displayBuffer, @startRow, @endRow) ->
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@id = @constructor.idCounter++
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destroy: ->
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@displayBuffer.destroyFold(this)
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inspect: ->
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"Fold(#{@startRow}, #{@endRow})"
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getBufferRange: ({includeNewline}={}) ->
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if includeNewline
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end = [@endRow + 1, 0]
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else
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end = [@endRow, Infinity]
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new Range([@startRow, 0], end)
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getBufferRowCount: ->
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@endRow - @startRow + 1
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handleBufferChange: (event) ->
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oldStartRow = @startRow
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if @isContainedByRange(event.oldRange)
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@displayBuffer.unregisterFold(@startRow, this)
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return
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@startRow += @getRowDelta(event, @startRow)
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@endRow += @getRowDelta(event, @endRow)
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if @startRow != oldStartRow
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@displayBuffer.unregisterFold(oldStartRow, this)
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@displayBuffer.registerFold(this)
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isContainedByRange: (range) ->
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range.start.row <= @startRow and @endRow <= range.end.row
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isContainedByFold: (fold) ->
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@isContainedByRange(fold.getBufferRange())
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getRowDelta: (event, row) ->
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{ newRange, oldRange } = event
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if oldRange.end.row <= row
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newRange.end.row - oldRange.end.row
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else if newRange.end.row < row
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newRange.end.row - row
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else
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0
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