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Avoid allocating an extra array

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This commit is contained in:
Antonio Scandurra
2015-05-18 14:55:23 +02:00
parent dc6938ae37
commit ba0df9fecb
1 changed files with 6 additions and 6 deletions
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12
src/text-editor-presenter.coffee
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@@ -306,19 +306,19 @@ class TextEditorPresenter
tileForRow: (row) ->
row - (row % @tileSize)
getVisibleTilesRange: ->
startTileRow = Math.max(0, @tileForRow(@startRow))
endTileRow = Math.min(
getStartTileRow: ->
Math.max(0, @tileForRow(@startRow))
getEndTileRow: ->
Math.min(
@tileForRow(@model.getScreenLineCount()), @tileForRow(@endRow)
)
[startTileRow..endTileRow]
updateTilesState: ->
return unless @startRow? and @endRow? and @lineHeight?
visibleTiles = {}
for startRow in @getVisibleTilesRange() by @tileSize
for startRow in [@getStartTileRow()..@getEndTileRow()] by @tileSize
endRow = Math.min(@model.getScreenLineCount(), startRow + @tileSize)
tile = @state.content.tiles[startRow] ?= {}