Re: [B2-devel] Tex-Edit Plus copy/paste problem in SS and B2 MacOSX

[Joshua J. <jj...@gm...>]

On Oct 18, 2009, at 1:07 PM, Ronald P. Regensburg wrote:

> Tested the TESyncScrap extension in 9.0.4 in the older SheepShaver
> build and in todays build with the fix by Alexei.
>
> The extension does not change copy and paste behaviour in either build
> (with the most serious problems fixed in the last build as I described
> earlier today) but it adds a problem with SimpleText. With the
> extension installed, copying in SimpleText causes a system crash and
> subsequent SheepShaver crash, thus preventing the only way one can
> copy from within SheepShaver and paste in MacOSX.

Thanks for your report.  I was able to reproduce the crash and  
determine the cause.[1]  I've uploaded a new version that fixes the  
problem.

TESyncScrap
http://jjuran.dyndns.org/~jjuran/experimental/TESyncScrap.mbin

Apparently some applications (including SimpleText) have taken their  
own measures to deal with the issue.  I tested the scrap  
synchronization behavior of several TextEdit-based applications with  
and without TESyncScrap installed:

Without TESyncScrap:

BBEdit width  both synced
SimpleText    both synced
Finder 9.0    both synced
Finder 7.5.6  synced paste (copy empties the OS X pasteboard)
Get Info      synced paste (copy empties the OS X pasteboard)
Notepad       synced copy
Stickies      nil

* 'Finder' refers to the Finder's filename editor
* 'Get Info refers to the filename and comment fields in the Finder's  
Get Info windows
* SimpleText and Stickies' respective behavior is unchanged between  
System 7.6.1 (in Basilisk II) and Mac OS 9.0.4
* BBEdit 5.1, Edit->Preferences->Editor->Wrap To->Width

With TESyncScrap installed, Notepad and Stickies synchronize in both  
directions, but the Finder is unaffected.

TESyncScrap only affects TextEdit-based fields (and not e.g. WASTE  
editors), and only solves the problem of a layer switch being  
required to synchronize the scrap.  The Finder is not an exception  
here, since after switching to another application inside the  
emulator pasting to OS X still fails.  Perhaps the Finder is putting  
another scrap flavor after 'TEXT' and it's running afoul of the  
ZeroScrap() issue.

[1] The templates I use for trap patches need to generate glue for  
each patch installed.  After refactoring the code earlier this year,  
the glue was generated only for each *function* used as a patch.   
Since TESyncScrap uses the same function to patch TECut() and TECopy 
(), and TECut() was installed later, TECopy()'s patch glue got  
munged.  The glue is now unique per trap/function pair.

>> On Sun, Oct 18, 2009 at 11:40 AM, Joshua Juran <jj...@gm...>
>> wrote:
>> On Oct 18, 2009, at 6:50 AM, Ronald P. Regensburg wrote:
>>
>>> I built SS MacOSX from current CVS (Intel only and I forgot to
>> reverse
>>> the SDL-audio patch).
>>>
>>> Clearly improved (tested with AppleWorks, Tex-Edit Plus and
>> SimpleText
>>> in MacOS9):
>>> - Copying and pasting of styled text between different applications
>>> within MacOS9 in SheepShaver works (when copied from SimpleText,
>>> styles are lost)
>>> - Copying and pasting of styled text from MacOSX to MacOS9 in
>>> SheepShaver works (with anomalies when pasted in SimpleText)
>>> - Copying and pasting from MacOS9 in SheepShaver to MacOSX works
>> only
>>> when copied from a SimpleText document and with styles lost.
>>
>> One of the issues you and others may have run into is the latency
>> occurring between use of the TextEdit scrap and synchronization with
>> the desk scrap, i.e. the clipboard.  Prior to Carbon, developers were
>> instructed to synchronize the two scraps on layer switch -- when an
>> application became or ceased to be frontmost.  The problem with this
>> approach is that it doesn't play well with screen-in-a-window
>> arrangements where switching to another app in OS X doesn't cause an
>> OS 9 layer switch and consequently gets stale clipboard data.
>>
>> I've written a system extension called TESyncScrap that patches TECut
>> () and TECopy() to flush the TE scrap and TEPaste() to update it.  I
>> invite you to try it out and see if it's useful.  The source code is
>> also available.[1]
>>
>> TESyncScrap
>> http://jjuran.dyndns.org/~jjuran/experimental/TESyncScrap.mbin
>>
>> TESyncScrap.cc
>> <http://github.com/jjuran/metamage_1/blob/
>> bd25287ac1551371da0fcf4fd9815b5d14e707db/pedestal/Hacks/TESyncScrap/
>> TESyncScrap.cc>
>>
>> You'll need a MacBinary decoder.  There are several in the
>> 'experimental' directory.
>>
>> Josh
>>
>> [1] The location may move as things get reorganized, but it will
>> remain on github.