Minimize writing ANSI escape sequences in PSReadline #4110
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Instead of changing Console.*groundColor on every character, only set the color when the color changes - this avoids writing out ANSI escape sequences after every character. Fixes PowerShell#4075
SteveL-MSFT
reviewed
Jun 26, 2017
| Console.BackgroundColor = buffer[i].BackgroundColor; | ||
| var nextForegroundColor = buffer[i].ForegroundColor; | ||
| var nextBackgroundColor = buffer[i].BackgroundColor; | ||
| if (lastForegroundColor != nextForegroundColor) |
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Small nitpick, but it seems that if (nextForegroundColor != lastForegroundColor) is slightly more correct improving readability
| { | ||
| Console.ForegroundColor = lastForegroundColor = nextForegroundColor; | ||
| } | ||
| if (lastBackgroundColor != nextBackgroundColor) |
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| Console.Write(buffer[i].UnicodeChar); | ||
| } | ||
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| Console.BackgroundColor = backgroundColor; | ||
| Console.ForegroundColor = foregroundColor; | ||
| if (backgroundColor != lastBackgroundColor) |
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Pretty much everywhere else you have foreground first, then background. Another nitpick, but I would reorder these two if statements
SteveL-MSFT
approved these changes
Jun 27, 2017
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Instead of changing Console.*groundColor on every character, only set
the color when the color changes - this avoids writing out ANSI escape
sequences after every character.
Fixes #4075