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Merge adjacent isomorphic regions after adding new regions

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Nathan Sobo
2013-05-09 15:13:09 -06:00
parent d9c258f27e
commit b4c95d4fc9
2 changed files with 21 additions and 0 deletions
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14
src/app/row-map.coffee
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@@ -94,6 +94,20 @@ class RowMap
newRegions.push(bufferRows: overlapEndBufferRow - endBufferRow, screenRows: overlapEndScreenRow - endScreenRow)
@regions[overlapStartIndex..overlapEndIndex] = newRegions
@mergeIsomorphicRegions(Math.max(0, overlapStartIndex - 1), Math.min(@regions.length - 1, overlapEndIndex + 1))
mergeIsomorphicRegions: (startIndex, endIndex) ->
return if startIndex == endIndex
region = @regions[startIndex]
nextRegion = @regions[startIndex + 1]
if region.bufferRows == region.screenRows and nextRegion.bufferRows == nextRegion.screenRows
@regions[startIndex..startIndex + 1] =
bufferRows: region.bufferRows + nextRegion.bufferRows
screenRows: region.screenRows + nextRegion.screenRows
@mergeIsomorphicRegions(startIndex, endIndex - 1)
else
@mergeIsomorphicRegions(startIndex + 1, endIndex)
# This method records insertion or removal of rows in the buffer, adjusting the
# buffer dimension of regions following the start row accordingly.