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clutter/text: Make update_cursor_location() operate in stage coordinates

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Until now we would `clutter_input_focus_set_cursor_location` with
cursor-rectangle-in-physical-pixels + actor-location-in-stage-coordinates.
But those use different scaling factors so it only got the right answer
when the framebuffer scale was 1.0.

This directly determines the geometry of the invisible dummy cursor in
gnome-shell ibusCandidatePopup.js:

```
  panelService.connect('set-cursor-location', (ps, x, y, w, h) => {
      this._setDummyCursorGeometry(x, y, w, h);
  });
```

And because it's invisible it wasn't obvious that it was wrong until you
enable `CLUTTER_PAINT=damage-region` and you can see its ghost at the wrong
offset and scale.

So now we `clutter_input_focus_set_cursor_location` using purely unscaled
stage coordinates. And `CLUTTER_PAINT=damage-region` shows that
gnome-shell's `_dummyCursor` is placed precisely over the visible cursor.

Fixes: https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/3399
and probably other IBus issues that arise when using framebuffer scaling.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1576>
This commit is contained in:
Daniel van Vugt 2020-11-19 18:15:34 +08:00 committed by Marge Bot
parent db30a4d7b4
commit ebf9f18080
1 changed files with 1 additions and 1 deletions
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2
clutter/clutter/clutter-text.c
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@ -1307,7 +1307,7 @@ update_cursor_location (ClutterText *self)
if (!priv->editable)
return;
rect = priv->cursor_rect;
clutter_text_get_cursor_rect (self, &rect);
clutter_actor_get_transformed_position (CLUTTER_ACTOR (self), &x, &y);
graphene_rect_offset (&rect, x, y);
clutter_input_focus_set_cursor_location (priv->input_focus, &rect);