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Handle the case where there is no layout information at all more efficiently.

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git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/gui/trunk@18474 72102866-910b-0410-8b05-ffd578937521
This commit is contained in:
Alexander Malmberg 2004-01-25 03:20:52 +00:00
parent af88bed81e
commit 5ce50e1384
2 changed files with 19 additions and 4 deletions
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7
ChangeLog
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@ -1,3 +1,10 @@
2004-01-25 04:15 Alexander Malmberg <alexander@malmberg.org>
* Source/NSLayoutManager.m (-invalidateDisplayForCharacterRange:,
-textStorage:edited:range:changeInLength:invalidatedRange:): Adjust
a few edge cases so that no work is done if there is no existing
layout information.
2004-01-24 15:17 Gregory John Casamento <greg_casamento@yahoo.com>
* Headers/AppKit/NSDataLink.h: Added ivars.

16
Source/NSLayoutManager.m
View file

@ -1689,7 +1689,7 @@ TODO: not really clear what these should do
-(void) invalidateDisplayForCharacterRange: (NSRange)aRange
{
if (layout_char < aRange.location)
if (layout_char <= aRange.location)
return;
if (layout_char < aRange.location + aRange.length)
aRange.length = layout_char - aRange.location;
@ -1777,6 +1777,7 @@ this file describes this.
NSRange r;
unsigned int original_last_glyph, new_last_glyph;
int glyph_delta;
BOOL had_layout;
/* printf("\n*** invalidating\n");
[self _dumpLayout];*/
@ -1789,6 +1790,7 @@ this file describes this.
TODO: make sure last_glyph is set as expected
*/
original_last_glyph = layout_glyph;
had_layout = layout_char > 0;
if (!(mask & NSTextStorageEditedCharacters))
lengthChange = 0;
@ -1804,7 +1806,9 @@ this file describes this.
layout_char = r.location;
}
if (layout_char == [_textStorage length])
if (!layout_char)
new_last_glyph = 0;
else if (layout_char == [_textStorage length])
new_last_glyph = [self numberOfGlyphs];
else
new_last_glyph = [self glyphRangeForCharacterRange: NSMakeRange(layout_char, 1)
@ -1814,7 +1818,7 @@ this file describes this.
/* printf("original=%i, new=%i, delta %i\n",
original_last_glyph,new_last_glyph,glyph_delta);*/
if (r.location <= layout_char)
if (had_layout && r.location <= layout_char)
{
unsigned int glyph_index, last_glyph;
textcontainer_t *tc;
@ -1827,7 +1831,11 @@ this file describes this.
Note that r.location might equal layout_char, in which case
r.location won't actually have any text container or line frag.
*/
if (r.location == [_textStorage length])
if (!r.location)
{
glyph_index = 0;
}
else if (r.location == [_textStorage length])
{
/*
Since layout was built beyond r.location, glyphs must have been