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Adjust handling of selected range changes in response to text changes.

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git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/gui/trunk@19866 72102866-910b-0410-8b05-ffd578937521
This commit is contained in:
alexm 2004-08-11 23:46:37 +00:00
parent 28fca687a2
commit 706921d435
4 changed files with 50 additions and 21 deletions
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27
Source/NSLayoutManager.m
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@ -2094,7 +2094,7 @@ no_soft_invalidation:
[self _didInvalidateLayout];
if ((mask & NSTextStorageEditedCharacters) && lengthChange)
if (mask & NSTextStorageEditedCharacters)
{
/*
Adjust the selected range so it's still valid. We don't try to
@ -2116,7 +2116,7 @@ no_soft_invalidation:
--------------------------
after after location += lengthChange;
in after length = NSMaxRange(sel)-NSMaxRange(range)-lengthChange; location=NSMaxRange(range);
in in length = 0; location=range.location;
in in length = 0; location=NSMaxRange(range);
before after length += lengthChange;
before in length = range.location-location;
before before do nothing
@ -2127,34 +2127,43 @@ no_soft_invalidation:
One important property of this behavior is that if length is 0 before,
it will be 0 after.
*/
NSRange newRange = _selected_range;
if (_selected_range.location >= NSMaxRange(range) - lengthChange)
{ /* after after */
_selected_range.location += lengthChange;
newRange.location += lengthChange;
}
else if (_selected_range.location >= range.location)
{
if (NSMaxRange(_selected_range) > NSMaxRange(range) - lengthChange)
{ /* in after */
_selected_range.length = NSMaxRange(_selected_range) - NSMaxRange(range) - lengthChange;
_selected_range.location = NSMaxRange(range);
newRange.length = NSMaxRange(_selected_range) - NSMaxRange(range) - lengthChange;
newRange.location = NSMaxRange(range);
}
else
{ /* in in */
_selected_range.length = 0;
_selected_range.location = range.location;
newRange.length = 0;
newRange.location = NSMaxRange(range);
}
}
else if (NSMaxRange(_selected_range) > NSMaxRange(range) - lengthChange)
{ /* before after */
_selected_range.length += lengthChange;
newRange.length += lengthChange;
}
else if (NSMaxRange(_selected_range) > range.location)
{ /* before in */
_selected_range.length = range.location - _selected_range.location;
newRange.length = range.location - _selected_range.location;
}
else
{ /* before before */
}
/* If there are text views attached to use, let them handle the
change. */
if ([self firstTextView])
[[self firstTextView] setSelectedRange: newRange];
else
_selected_range = newRange;
}
}