Actually i'm doing nothing special in setLineFragmentRect... i simply
note the fragment and call super's setLineFragmentRect...
What i observed is that the a new typesetter gets initialized only
when i try to edit the text, and then it goes in to an infinite loop
On 25-Nov-08, at 12:35 AM, Aki Inoue wrote:
NSATSTypesetter trying to create a new instance is a normal behavior.
When the typesetter detects it's being invoked to layout
recursively, it instantiates a copy.
The real culprit here is probably at #15 -[TTypesetter
setLineFragmentRect:forGlyphRange:usedRect:baselineOffset:] that's
triggering the recursive layout.
Aki
On 2008/11/23, at 22:45, chaitanya pandit wrote:
In my application i have an NSTextView with custom NSTextContainer
and also a custom NSTypesetter, i have a problem with displaying
HTML stuff in the textView.
I copied and pasted the entire contents of an html page ( it was
news.google.com to be precise), it displays it fine, but whenever i
try to edit the text contents, my app goes into an infinite loop.
While debugging i observed a very weird thing, a new typesetter is
getting initialized within the
"layoutCharactersInRange:forLayoutManager:maximumNumberOfLineFragments
" method.
Any idea about what might be going wrong?
I'd appreciate any help.
Here is the trace(note the #0):
#0 0x00077a35 in -[TTypesetter init] at TTypesetter.m:25
#1 0x907691a9 in -[NSATSTypesetter
layoutCharactersInRange:forLayoutManager:maximumNumberOfLineFragments
:]
#2 0x00077c08 in -[TTypesetter
layoutCharactersInRange:forLayoutManager:maximumNumberOfLineFragments
:] at TTypesetter.m:95
#3 0x90455f77 in -[NSLayoutManager(NSPrivate)
_fillLayoutHoleForCharacterRange:desiredNumberOfLines:isSoft:]
#4 0x905953b6 in _NSFastFillAllLayoutHolesForGlyphRange
#5 0x9051e0ba in -[NSLayoutManager(NSPrivate)
_firstPassGlyphRangeForBoundingRect:inTextContainer:okToFillHoles:]
#6 0x9051cff1 in -[NSLayoutManager(NSPrivate)
_glyphRangeForBoundingRect:inTextContainer:fast:okToFillHoles:]
#7 0x9051ce27 in -[NSLayoutManager
glyphRangeForBoundingRect:inTextContainer:]
#8 0x9051c35e in -[NSTextView
setNeedsDisplayInRect:avoidAdditionalLayout:]
#9 0x9051be8b in -[NSTextView setNeedsDisplayInRect:]
#10 0x903be662 in -[NSView setNeedsDisplay:]
#11 0x9051cb82 in -[NSTextView textContainerOrigin]
#12 0x90521b8f in -[NSLayoutManager(NSPrivate)
_resizeTextViewForTextContainer:]
#13 0x90406ed0 in -[NSLayoutManager(NSPrivate)
_updateUsageForTextContainer:addingUsedRect:]
#14 0x9045be46 in -[NSLayoutManager
setLineFragmentRect:forGlyphRange:usedRect:]
#15 0x00078688 in -[TTypesetter
setLineFragmentRect:forGlyphRange:usedRect:baselineOffset:] at
TTypesetter.m:325
#16 0x90420776 in -[NSATSTypesetter
_layoutLineFragmentStartingWithGlyphAtIndex:characterIndex:atPoint:renderingContext
:]
#17 0x904583db in -[NSATSTypesetter layoutParagraphAtPoint:]
#18 0x00077ba8 in -[TTypesetter layoutParagraphAtPoint:] at
TTypesetter.m:86
#19 0x90400bcd in -[NSTypesetter
_layoutGlyphsInLayoutManager:startingAtGlyphIndex:maxNumberOfLineFragments:maxCharacterIndex:nextGlyphIndex:nextCharacterIndex
:]
#20 0x909ed6f6 in -[NSTypesetter
layoutCharactersInRange:forLayoutManager:maximumNumberOfLineFragments
:]
#21 0x90769238 in -[NSATSTypesetter
layoutCharactersInRange:forLayoutManager:maximumNumberOfLineFragments
:]
#22 0x00077c08 in -[TTypesetter
layoutCharactersInRange:forLayoutManager:maximumNumberOfLineFragments
:] at TTypesetter.m:95
#23 0x90455f77 in -[NSLayoutManager(NSPrivate)
_fillLayoutHoleForCharacterRange:desiredNumberOfLines:isSoft:]
#24 0x905953b6 in _NSFastFillAllLayoutHolesForGlyphRange
#25 0x90548225 in -[NSTextView(NSPrivate)
_ensureLayoutCompleteToEndOfCharacterRange:]
#26 0x90547c81 in -[NSTextView(NSSharing) didChangeText]
#27 0x90543ea2 in -[NSTextView insertText:replacementRange:]
#28 0x905433d3 in -[NSTextView insertText:]
#29 0x90542efa in -
[NSKeyBindingManager(NSKeyBindingManager_MultiClients)
flushTextForClient:]
#30 0x9054144f in -[NSTSMInputContext interpretKeyEvents:]
#31 0x90540f1a in -[NSView interpretKeyEvents:]
#32 0x90540e2a in -[NSTextView keyDown:]
#33 0x904b13a5 in -[NSWindow sendEvent:]
#34 0x9047d311 in -[NSApplication sendEvent:]
#35 0x903dad0f in -[NSApplication run]
#36 0x903a7f14 in NSApplicationMain
#37 0x000029b0 in main at main.m:12
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