Re: textview buffers and primary clipboard issue

2019-02-25 Thread Doug McCasland 
Well I played with some tag table calls and now things work correctly.

Previously I was using:
|  gtk_text_view_new()

which creates a TextView and a buffer, then 
|  buf[i] = gtk_text_view_get_buffer()

to get the buffer object.  Then for each new tag in each buffer: 

|  gtk_text_buffer_create_tag(buf[i],)

That was very inefficient, since I wanted each buffer to have 
all the same tags.  So I re-worked the code so it only created 
the tags once in the first buffer and then I created subsequent 
buffers using that tag set.  Here are the basics of what I did:
|  GtkTextTagTable *main_tag_table;
| tv[0] = gtk_text_view_new();
| buf[0] = gtk_text_view_get_buffer(GTK_TEXT_VIEW(tv[0]);
| main_tag_table = gtk_text_buffer_get_tag_table(buf[0]);

For subsequent buffers:
|  buf[i] = gtk_text_buffer_new(main_tag_table);
| tv[i] = gtk_text_view_new_with_buffer(buf[i]);

Then create new tags only in the first buffer:
|  gtk_text_buffer_create_tag(buf[0], ..., );

I still called:
|  gtk_text_buffer_register_serialize_tagset()

and
|  gtk_text_buffer_register_deserialize_tagset()

in each buffer.

So there's something about not sharing that tag table that makes 
middle-button paste act strangely.  Might have been a GTK bug, 
or some part of my code (always more likely ☺).  However, the 
Primary clipboard after selecting text that is followed by an 
image (in a TextView buffer, that is) still has all that unselected 
image data.  But somehow it doesn't get pasted by middle-button 
click, so that's odd.
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Re: textview buffers and primary clipboard issue

2019-02-21 Thread Doug McCasland 


Some add'l info:

This is using GTK 3.24 in Lubuntu 18.10.

When I select with the mouse and use middle-click to paste in 
the *same* buffer -- with an image below the text, as described 
above -- it does work normally.  So in that case, even though 
the Primary clipboard incorrectly contains non-selected image 
data, TextView is not pasting all of what's on the Primary clipboard, 
apparently.  

--
Doug McCasland, San Francisco  
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textview buffers and primary clipboard issue

2019-02-19 Thread Doug McCasland 
Hi,

I have a GTK3 app that uses Notebook with a TextView buffer for 
each page.  At startup, I call:
|  tagset_atom_serialize = 
| gtk_text_buffer_register_serialize_tagset(buf[i], "myapp");
| tagset_atom_deserialize = 
| gtk_text_buffer_register_deserialize_tagset(buf[i], "myapp");

for each buffer.

Then I read and write files with:
|  gtk_text_buffer_deserialize_set_can_create_tags(buf[i],
| tagset_atom_deserialize, FALSE);
| gtk_text_buffer_deserialize(buf[i], buf[i], 
| tagset_atom_deserialize,   
| &iter, fdata, (gsize )len, &error);

and
|  serialized = gtk_text_buffer_serialize(buf[i],
| buf[i], tagset_atom_serialize,
| &start, &end, &len);

All of that works.  Now here's the problem.  I can select text 
with the mouse in Buffer 1 and use middle button to paste it in 
Buffer 2 (ie, via the Primary clipboard).  BUT if there is a PixBuf 
in Buffer1, below the selected text, then somehow the pixbuf and 
many lines below it are put on the Primary clipboard, even though 
I did not select any of that with the mouse.  So when I paste 
it into Buffer 2 using the middle button, I see the selected text 
plus image(s) and extra junk.  Okay, that's bad enough ☺, but 
when I save that buffer (ie, serialize code above), the whole 
process hangs and I have to kill it with SIGKILL!  No error messages 
on stdout from the process.

I can work around this by using Ctrl-C to copy a mouse selection 
and Ctrl-V to paste, and that works as expected.

Here is the output of the xclip command, after selecting "baz" 
with the mouse (note the extra stuff put on the clipboard):
|  PRIMARY contents
| GTKTEXTBUFFERCONTENTS-0001. . . .
|  
|  
| baz
| 
| 
| 
| 
| 
| 
| GTKTEXTBUFFERPIXBDATA-00. .. .

and here is the secondary clipboard when using Ctrl-C on the same 
mouse selection:
|  clipboard contents
| GTKTEXTBUFFERCONTENTS-0001J 
|  
|  
| baz
| 


Any ideas on what I'm doing wrong and how to make middle-click 
paste work between buffers, when there is a pixbuf in the source 
buffer?

--
Doug McCasland, San Francisco  
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