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keyboard: Refactor finding of conflicting items

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When comparing keys for uniqueness, we currently apply various tests to
check whether shortcuts are different, until we decide that we found a
conflict if none of the tests passed. That approach is a bit weird for
shortcuts that have a reverse item - when comparing a binding to two
different shortcuts, it should always be different from at least one of
them, so there should never be a conflict for any reversible shortcuts.
The reason it does work anyway is that reverse items usually only differ
in modifiers, which is_shortcut_different() currently doesn't consider at
all. We are about to change that however, so refactor the code to set the
conflicting item as soon as we find a match rather than as fall-through.

https://bugzilla.gnome.org/show_bug.cgi?id=673078
This commit is contained in:
Florian Müllner 2013-08-27 01:57:41 +02:00
parent 5e4fa7bd39
commit ab353591f8
1 changed files with 15 additions and 19 deletions
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32
panels/keyboard/cc-keyboard-manager.c
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@ -102,25 +102,24 @@ get_binding_from_variant (GVariant *variant)
}
static gboolean
is_shortcut_different (CcUniquenessData *data,
find_conflict (CcUniquenessData *data,
CcKeyboardItem *item)
{
CcKeyCombo *combo = item->primary_combo;
gboolean is_conflict = FALSE;
if (data->orig_item && cc_keyboard_item_equal (data->orig_item, item))
return FALSE;
if (data->new_keyval != 0)
{
if (data->new_keyval != combo->keyval)
return TRUE;
}
else if (combo->keyval != 0 || data->new_keycode != combo->keycode)
{
return TRUE;
}
is_conflict = data->new_keyval == combo->keyval;
else
is_conflict = combo->keyval == 0 && data->new_keycode == combo->keycode;
return FALSE;
if (is_conflict)
data->conflict_item = item;
return is_conflict;
}
static gboolean
@ -143,17 +142,14 @@ compare_keys_for_uniqueness (CcKeyboardItem *current_item,
if (reverse_item && cc_keyboard_item_is_hidden (current_item))
return FALSE;
if (is_shortcut_different (data, current_item))
return FALSE;
if (find_conflict (data, current_item))
return TRUE;
/* Also check for the reverse item if any */
if (reverse_item && is_shortcut_different (data, reverse_item))
return FALSE;
/* No tests failed and we found a conflict */
data->conflict_item = current_item;
if (reverse_item && find_conflict (data, reverse_item))
return TRUE;
return FALSE;
}
static gboolean