Copy just enough of libwayland-cursor to make our own
loading. This lets us drop the dependency on libwayland-cursor,
and changes the startup cost for cursor theme loading
from 25ms to 0.1ms.
At the same time, simplify the handling of scaled cursors -
instead of creating an array of theme objects, just make a
single theme object provide all scaled cursor sizes.
Count how often each tree node is visited, and print the number
at the end. This gives a good indication what selectors are costly
and should be avoided. #ifdefed out.
This was broken in various ways; Tabbing between pages
was causing segfaults, and using the hover state like
this does not work anymore, with hover now being completely
managed by GTK. Use focus instead, and also fix up the
style.
printer_name_compressed_strv is NULL-terminated array
of gchar*, which means N+1 memory should be allocated.
Otherwise, if the printer name has no empty components
(which is usually the case), printer_name_compressed_strv[N],
which should contain the NULL sentinel, will actually lie
just outside of allocated memory, which is UB.
In my case, it led to crashes inside g_strjoinv
when Print... dialog is opened in evince.
#0 0x00007fad2ce1bad7 in __strlen_avx2 () at ../sysdeps/x86_64/multiarch/strlen-avx2.S:96
#1 0x00007fad2d04d88d in g_strjoinv (separator=separator@entry=0x7fad0c9bc508 "-", str_array=str_array@entry=0x556b017f0200) at ../glib-2.60.7/glib/gstrfuncs.c:2585
#2 0x00007fad0c9b8a89 in avahi_service_resolver_cb (source_object=<optimized out>, res=<optimized out>, user_data=0x7fad08020ee0) at /var/tmp/portage/x11-libs/gtk+-3.24.13/work/gtk+-3.24.13/modules/printbackends/cups/gtkprintbackendcups.c:3223
#3 0x00007fad2d1f8ed3 in g_task_return_now (task=0x556b017a8b00 [GTask]) at ../glib-2.60.7/gio/gtask.c:1209
#4 0x00007fad2d1f987d in g_task_return (task=0x556b017a8b00 [GTask], type=<optimized out>) at ../glib-2.60.7/gio/gtask.c:1278
#5 0x00007fad2d1f9dec in g_task_return (type=G_TASK_RETURN_SUCCESS, task=<optimized out>) at ../glib-2.60.7/gio/gtask.c:1678
#6 0x00007fad2d1f9dec in g_task_return_pointer (task=<optimized out>, result=<optimized out>, result_destroy=<optimized out>) at ../glib-2.60.7/gio/gtask.c:1683
#7 0x00007fad2d24b6af in g_dbus_connection_call_done (source=<optimized out>, result=0x556b017a8bc0, user_data=0x556b017a8b00) at ../glib-2.60.7/gio/gdbusconnection.c:5747
#8 0x00007fad2d1f8ed3 in g_task_return_now (task=0x556b017a8bc0 [GTask]) at ../glib-2.60.7/gio/gtask.c:1209
#9 0x00007fad2d1f8f09 in complete_in_idle_cb (task=0x556b017a8bc0) at ../glib-2.60.7/gio/gtask.c:1223
#10 0x00007fad2d02d2c0 in g_main_dispatch (context=0x556b00eee090) at ../glib-2.60.7/glib/gmain.c:3189
#11 0x00007fad2d02d2c0 in g_main_context_dispatch (context=context@entry=0x556b00eee090) at ../glib-2.60.7/glib/gmain.c:3854
#12 0x00007fad2d02d658 in g_main_context_iterate (context=context@entry=0x556b00eee090, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../glib-2.60.7/glib/gmain.c:3927
#13 0x00007fad2d02d6df in g_main_context_iteration (context=context@entry=0x556b00eee090, may_block=may_block@entry=1) at ../glib-2.60.7/glib/gmain.c:3988
#14 0x00007fad2d22248d in g_application_run (application=0x556b0116f130 [EvApplication], argc=<optimized out>, argv=<optimized out>) at ../glib-2.60.7/gio/gapplication.c:2519
#15 0x0000556b002e55a1 in ()
#16 0x00007fad2ccd6f1b in __libc_start_main (main=0x556b002e50d0, argc=2, argv=0x7ffe1057fa88, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffe1057fa78) at ../csu/libc-start.c:308
#17 0x0000556b002e567a in ()
(gdb) p printer_name_compressed_strv[0]
$4 = (gchar *) 0x556d4a4be430 "Brother"
(gdb) p printer_name_compressed_strv[1]
$5 = (gchar *) 0x7f9dbc011090 "MFC"
(gdb) p printer_name_compressed_strv[2]
$6 = (gchar *) 0x556d4a51ba50 "7860DW"
(gdb) p printer_name_compressed_strv[3]
$7 = (gchar *) 0x401 <error: Cannot access memory at address 0x401>
