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Don't allow NaNs

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Ben Ogle
2013-09-30 17:21:28 -07:00
parent 45d3fea3d0
commit aa404a316d
1 changed files with 6 additions and 2 deletions
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8
src/editor.coffee
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@@ -1400,14 +1400,18 @@ class Editor extends View
#
# Returns a {Number}.
getFirstVisibleScreenRow: ->
Math.floor(@scrollTop() / @lineHeight)
screenRow = Math.floor(@scrollTop() / @lineHeight)
screenRow = 0 if isNaN(screenRow)
screenRow
# Retrieves the number of the row that is visible and currently at the bottom of the editor.
#
# Returns a {Number}.
getLastVisibleScreenRow: ->
calculatedRow = Math.ceil((@scrollTop() + @scrollView.height()) / @lineHeight) - 1
Math.max(0, Math.min(@getScreenLineCount() - 1, calculatedRow))
screenRow = Math.max(0, Math.min(@getScreenLineCount() - 1, calculatedRow))
screenRow = 0 if isNaN(screenRow)
screenRow
# Given a row number, identifies if it is currently visible.
#