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Correct cursor jumping from line 2 to line 1 due to line 1 being empty. #1108

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merged 4 commits into from
Oct 29, 2019
Merged

Correct cursor jumping from line 2 to line 1 due to line 1 being empty. #1108

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43c5582
Reuse GetBeginningOfLinePos in InsertLineAbove
msftrncs Oct 29, 2019
d6197e6
Correct skipping of checking first character in buffer for new lines.
msftrncs Oct 29, 2019
e02f4c9
Add test to check for HOME from line 2 when line 1 is blank.
msftrncs Oct 22, 2019
a47fddf
Add test case for inserting leading blank lines.
msftrncs Oct 22, 2019
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20 changes: 1 addition & 19 deletions PSReadLine/BasicEditing.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -473,25 +473,7 @@ public static void AddLine(ConsoleKeyInfo? key = null, object arg = null)
public static void InsertLineAbove(ConsoleKeyInfo? key = null, object arg = null)
{
// Move the current position to the beginning of the current line and only the current line.
if (_singleton.LineIsMultiLine())
{
int i = Math.Max(0, _singleton._current - 1);
for (; i > 0; i--)
{
if (_singleton._buffer[i] == '\n')
{
i += 1;
break;
}
}

_singleton._current = i;
}
else
{
_singleton._current = 0;
}

_singleton._current = GetBeginningOfLinePos(_singleton._current);
Insert('\n');
PreviousLine();
}
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6 changes: 3 additions & 3 deletions PSReadLine/Position.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -15,10 +15,10 @@ private static int GetBeginningOfLinePos(int current)

if (_singleton.LineIsMultiLine())
{
int i = Math.Max(0, current - 1);
for (; i > 0; i--)
int i = Math.Max(0, current);
while (i > 0)
{
if (_singleton._buffer[i] == '\n')
if (_singleton._buffer[--i] == '\n')
{
i += 1;
break;
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6 changes: 6 additions & 0 deletions test/BasicEditingTest.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -292,6 +292,12 @@ public void InsertLineAbove()
_.Ctrl_Enter, CheckThat(() => AssertCursorLeftTopIs(continutationPromptLength, 1)),
_.Ctrl_Enter, CheckThat(() => AssertCursorLeftTopIs(continutationPromptLength, 1)),
"9ABC"));

// Test case - create leading blank line, cursor to stay on same line
Test("\n\n1234", Keys("1234",
_.Ctrl_Enter, CheckThat(() => AssertCursorLeftTopIs(0,0)),
_.DownArrow, CheckThat(() => AssertCursorLeftTopIs(continutationPromptLength, 1)),
_.Ctrl_Enter, CheckThat(() => AssertCursorLeftTopIs(continutationPromptLength, 1))));
}

[SkippableFact]
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6 changes: 6 additions & 0 deletions test/MovementTest.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -173,6 +173,12 @@ public void MultilineCursorMovement()
_.DownArrow, CheckThat(() => AssertCursorLeftTopIs(5 + continutationPromptLength, 4)),
_.DownArrow, CheckThat(() => AssertCursorLeftTopIs(6 + continutationPromptLength, 5)),

// Using the input previously entered, check for correct cursor movements when first line is blank
_.Home, _.Home, CheckThat(() => AssertCursorLeftTopIs(0, 0)),
_.DownArrow, CheckThat(() => AssertCursorLeftTopIs(8 + continutationPromptLength, 1)),
_.Home, CheckThat(() => AssertCursorLeftTopIs(continutationPromptLength, 1)),
_.Home, CheckThat(() => AssertCursorLeftTopIs(0,0)),

// Clear the input, we were just testing movement
_.Escape
));
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