_gtk_tree_view_find_path() was not a name that not really described what
the function does. And I kept forgetting it. Also, it took the tree view
as an argument and that was completely unnecessary.
This way, the a11y code knows if a column was reordered, added or
removed and can do the right things instead of trying to guess and
getting it wrong.
Also, this patch finalizes the changes so that only visible columns
exist to the accessibility interface.
In fact, invent our own function get_n_columns() which actually only
counts the visible functions, because that's the only ones we care
about.
The places where it's not used yet will be changed in the coming
patches.
Track the RBNode/RBTree instead of keeping a TreeRowReference. This is a
whole lot faster and less error-prone.
Also, notify the accessible of removal of rows before actually removing
them, so we have a chance to clean up.
Instead of requiring a special functio to be called before just removing
from the hash table. This simplifies code a lot that used to remove from
the hash table.
- Name it properly
- Make it just a set of cell_infos
Currently it's using direct hash, but as long as we don't actually
lookup stuff from it, who cares...
We implement get_cell_index() now, so it's no longer necessary.
As a side effect, we need a different index for our hash table (which
now has a wrong name, but that will soon change).
Ahem.
This is in preparation for future changes and is not meant to stay this
way. But I want to change the hash table's keys and this is way easier
when nobody is using them.
The following assertion was triggered in model_row_inserted() because
iterate_thru_children() modifies the parameter tree_model before passing it to
traverse_cells().
Gtk-CRITICAL **: gtk_tree_path_compare: assertion `b->depth > 0' failed
The stack with the bug was:
#0 gtk_tree_path_compare at gtktreemodel.c
#1 traverse_cells at gtktreeviewaccessible.c
#2 model_row_inserted at gtktreeviewaccessible.c
This patch calls iterate_thru_children() with a copy of the path so that the
original is not modified.
