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Guard against invalid positions

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Tae Won Ha 2016-07-05 19:00:27 +02:00
parent 292e2be410
commit 01cbb584be
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1 changed files with 12 additions and 0 deletions
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12
SwiftNeoVim/Grid.swift
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@ -198,6 +198,10 @@ class Grid: CustomStringConvertible {
}
func isCellEmpty(position: Position) -> Bool {
guard self.isSane(position: position) else {
return false
}
if self.cells[position.row][position.column].string.characters.count == 0 {
return true
}
@ -241,4 +245,12 @@ class Grid: CustomStringConvertible {
self.cells[i].replaceRange(region.left...region.right, with: clearedRow)
}
}
private func isSane(position position: Position) -> Bool {
guard position.row < self.size.height && position.column < self.size.width else {
return false
}
return true
}
}