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Add clipScreenPosition to LineFolder & LineMap

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This commit is contained in:
Nathan Sobo
2012-02-24 15:35:28 -07:00
parent b8ef7685de
commit 33ff32f9a4
3 changed files with 38 additions and 1 deletions
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3
src/atom/line-folder.coffee
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@@ -136,6 +136,9 @@ class LineFolder
bufferPositionForScreenPosition: (screenPosition) ->
@lineMap.bufferPositionForScreenPosition(screenPosition)
clipScreenPosition: (screenPosition) ->
@lineMap.clipScreenPosition(screenPosition)
screenRangeForBufferRange: (bufferRange) ->
@lineMap.screenRangeForBufferRange(bufferRange)

15
src/atom/line-map.coffee
View File

@@ -135,3 +135,18 @@ class LineMap
end = @screenPositionForBufferPosition(bufferRange.end)
new Range(start, end)
clipScreenPosition: (screenPosition) ->
screenPosition = Point.fromObject(screenPosition)
screenPosition = new Point(Math.max(0, screenPosition.row), Math.max(0, screenPosition.column))
screenDelta = new Point
for screenLine in @screenLines
nextDelta = screenDelta.add(screenLine.screenDelta)
break if nextDelta.isGreaterThan(screenPosition)
screenDelta = nextDelta
maxColumn = screenDelta.column + screenLine.lengthForClipping()
screenDelta.column = Math.min(maxColumn, screenPosition.column)
screenDelta