This ensures that client-side decorations (and maybe other client
behaviors) behave intuitively during interative moves, but means that
drag to snapped position -> drag to maximize -> un-maximize
will put the window back to its natural geometry (saved before the first
snap) rather than back to the snapped position. This is a change in
behavior, but a) simplifies the logic a bit, because the tiled state is
always in sync with the window geometry and b) in some sense is "more
correct", because the window has been "visually" un-tiled the minute the
window starts dragging.
Note that maximizing using an action (including the button) a window
that has been snapped and then un-maximizing the window will put the
window back to the snapped position, as it always has.
This also fixes a bug wherein dragging a window and pressing a hot-key
to maximize or fullscreen a window could leave a snap-region highlight
visible after the interactive move was canceled.
This builds on the work of @Consolatis in #1018.
Co-authored-by: Consolatis <35009135+Consolatis@users.noreply.github.com>
Co-authored-by: Andrew J. Hesford <ajh@sideband.org>
Whenever the output layout changes, each view's original geometry will
be captured as last_layout_geometry (if it has not already been captured
by a previous layout change), which will remain valid unless the user
modifies the view's geometry (i.e., by tiling, maximizing, moving,
resizing or full-screening). On subsequent output layout changes, views
with valid last_layout_geometry will be back to their original position
if possible, or else to the closest possible output.
...to address regression introduced by 57075ce and enables panel/desktop
clients which rely on window rules to remain in the same position when
the usable-area changes (normally because an exclusive layer-shell
clients is started/finished).
Also disallows interactive move/resize, for example by alt +
mouse-press.
Fixes: #1235
1. Prevent window snapping triggered by mouse from moving the window
into the adjacent output.
2. Make the coordinates used to check whether window snapping is
triggered relative to the output the cursor is at, not the output the
view is belonging to. This allows users to grab a tiled window and move
it into another output or tile it again in another output in a single
drag.
This is a useful (if lesser-known) feature of at least a few popular X11
window managers, for example Openbox and XFWM4. Typically right-click on
the maximize button toggles horizontal maximize, while middle-click
toggles vertical maximize.
Support in labwc uses the same configuration syntax as Openbox, where the
Maximize/ToggleMaximize actions have an optional "direction" argument:
horizontal, vertical, or both (default). The default mouse bindings match
the XFWM4 defaults (not sure what Openbox has by default).
Most of the external protocols still assume "maximized" is a Boolean,
which is no longer true internally. For the sake of the outside world,
a view is only "maximized" if maximized in both directions.
Internally, I've taken the following approach:
- SSD code decorates the view as "maximized" (i.e. hiding borders) only
if maximized in both directions.
- Layout code (interactive move/resize, tiling, etc.) generally treats
the view as "maximized" (with the restrictions that entails) if
maximized in either direction. For example, moving a vertically-
maximized view first restores the natural geometry (this differs from
Openbox, which instead allows the view to move only horizontally.)
v2: use enum view_axis for view->maximized
v3:
- update docs
- allow resizing if partly maximized
- add TODOs & corrections noted by Consolatis
This also improves the config robustness as invalid edge names will now
prevent the action to be created in the first place and the user gets
notified about the issue.
When wanting to snap to a region when starting the move
operation with A-Left (or a similar mousebind which includes a
modifier), the modifier - or another one - must be pressed again.
Fixes#761
IMHO it encourages better design (by making dependencies more obvious)
to have source file/header file pairs like view.c/view.h, rather than a
monolithic header like labwc.h with everything in it.
I don't think we need to break up all of labwc.h at once, but maybe we
can start pulling it apart bit by bit as it's convenient.
Also:
- Move "struct border" to ssd.h so that view.h can use it without pulling
in all of labwc.h.
- Add a missing required #include within scaled_font_buffer.h (forward
declaration of "struct font" is not enough).
Currently, snapping to a screen edge and then snapping to maximize
results in both the natural_geometry and tiled state of the view
getting messed up. After unmaximize, the view ends up in a weird
state (tiled location but natural/untiled size).
There are also a couple of sketchy things going on in the code:
- interactive_begin() pokes its own values into view->natural_geometry
to force view_maximize() to set a particular geometry.
- interactive_end() "fixes" view->natural_geometry after calling
view_maximize() to save the original geometry from the start of the
interactive move/resize.
To fix all this:
- Adjust/expand the API of view.c so that the interactive.c can
avoid this "back door" of overwriting view->natural_geometry
directly.
- Save the natural geometry and the tiled state of the view in
interactive_begin() when starting to move the view. When done,
interactive_end() will update the tiled state if appropriate but
*not* overwrite the natural geometry.
Fix a couple of glitches seen when exiting interactive move/resize:
- Cursor briefly set to left_ptr rather than the correct cursor image
- Cursor not updated if the view being moved/resized is destroyed
Also make sure to exit interactive mode if the view is going fullscreen
(labwc gets very confused otherwise).
Code changes in detail:
- Factor out set_server_cursor() which will set the correct cursor
image for non-client areas (either XCURSOR_DEFAULT or one of the
resize cursors).
- Unify the logic from cursor_rebase() and process_cursor_motion by
factoring out cursor_update_common(). This corrects some logic
discrepancies between the two, which should be a good thing(TM).
- Remove the extra cursor_set(XCURSOR_DEFAULT) from interactive_end()
and instead rely on cursor_update_focus() to do the right thing.
- Simplify cursor_button() by just calling interactive_end() when we
want to exit interactive mode.
- Call cursor_update_focus() from view_destroy() if the view had mouse
focus or was being interactively moved/resized.
v2: Eliminate force_reenter parameters and figure out automatically
when we need to re-enter the surface.
v3: Rename wlseat -> wlr_seat.
v4: Simplify client/server cursor logic.
