Text layout responsibility
Text layout responsibility
- Subject: Text layout responsibility
- From: Rimas <email@hidden>
- Date: Thu, 11 Dec 2008 22:16:18 +0200
Hello list,
I have performed quick search through the list and couldn't find
answer to my question.
I am trying to implement editable text view which changes text
position (paragraphs positions, to be exact) according to the some
text attributes. I know, that NSTextContainer is responsible for line
rects calculation when text should be placed in known shape. Is it
responsible for this when position depends on text attributes also?
Reason I am asking is that in method
lineFragmentRectForProposedRect:sweepDirection:movementDirection:remainingRect:
I do not have any information about glyphs or characters range to be
placed in proposed rect, only rect coordinates. Should I do this
manually by accessing container -> text view -> text storage? Maybe
NSLayoutManager or NSTypeSetter subclass would be better choice?
Another thing I'd like to ask, is where should I adjust text view/text
container size if this is necessary while typing? I have tried to do
this after getting NSTextStorageDidProcessEditingNotification
notification. But that raises an exception:
>> Exception raised during posting of notification. Ignored. exception: '*** NSRunStorage, _NSBlockNumberForIndex(): index (0) beyond array bounds (0)' invoked observer method: '*** -[MyTestController _TextStorageContentChanged:]' observer: 0x14d60b10 notification name: 'NSTextStorageDidProcessEditingNotification' <<
Any help is very appreciate.
Regards,
Rimas M.
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