desktops-shell: Add tiled orientation support using key-bindings

Patch adds KEY_UP/KEY_DOWN for tiled top and bottom positioning,
KEY_LEFT/KEY_RIGHT correspondingly, for left and right positioning.

It also modifies the man page to include these new bindings, But also with
commit 'compositor: Remove desktop zoom' we no longer have zoom effects
so removed them.

Signed-off-by: Marius Vlad <marius.vlad@collabora.com>

desktop-shell/shell.c

@@ -2896,6 +2896,83 @@ fullscreen_binding(struct weston_keyboard *keyboard,
 	set_fullscreen(shsurf, !fullscreen, NULL);
 }
 
+static void
+set_tiled_orientation(struct weston_surface *focus,
+		      enum weston_top_level_tiled_orientation orientation)
+{
+	struct weston_surface *surface;
+	struct shell_surface *shsurf;
+	int width, height;
+	pixman_rectangle32_t area;
+	struct weston_geometry geom;
+	int x, y;
+
+	surface = weston_surface_get_main_surface(focus);
+	if (surface == NULL)
+		return;
+
+	shsurf = get_shell_surface(surface);
+	if (shsurf == NULL)
+		return;
+
+	get_maximized_size(shsurf, &width, &height);
+	get_output_work_area(shsurf->shell, shsurf->output, &area);
+	geom = weston_desktop_surface_get_geometry(shsurf->desktop_surface);
+
+	if (orientation & WESTON_TOP_LEVEL_TILED_ORIENTATION_LEFT ||
+	    orientation & WESTON_TOP_LEVEL_TILED_ORIENTATION_RIGHT)
+		width /= 2;
+	else if (orientation & WESTON_TOP_LEVEL_TILED_ORIENTATION_TOP ||
+		orientation & WESTON_TOP_LEVEL_TILED_ORIENTATION_BOTTOM)
+		height /= 2;
+
+	x = area.x - geom.x;
+	y = area.y - geom.y;
+
+	if (orientation & WESTON_TOP_LEVEL_TILED_ORIENTATION_RIGHT)
+		x += width;
+	else if (orientation & WESTON_TOP_LEVEL_TILED_ORIENTATION_BOTTOM)
+		y += height;
+
+	weston_view_set_position(shsurf->view, x, y);
+	weston_desktop_surface_set_size(shsurf->desktop_surface, width, height);
+	weston_desktop_surface_set_orientation(shsurf->desktop_surface, orientation);
+	weston_compositor_schedule_repaint(surface->compositor);
+}
+
+static void
+set_tiled_orientation_left(struct weston_keyboard *keyboard,
+			   const struct timespec *time,
+			   uint32_t button, void *data)
+{
+	set_tiled_orientation(keyboard->focus, WESTON_TOP_LEVEL_TILED_ORIENTATION_LEFT);
+
+}
+
+static void
+set_tiled_orientation_right(struct weston_keyboard *keyboard,
+			   const struct timespec *time,
+			   uint32_t button, void *data)
+{
+	set_tiled_orientation(keyboard->focus, WESTON_TOP_LEVEL_TILED_ORIENTATION_RIGHT);
+}
+
+static void
+set_tiled_orientation_up(struct weston_keyboard *keyboard,
+			   const struct timespec *time,
+			   uint32_t button, void *data)
+{
+	set_tiled_orientation(keyboard->focus, WESTON_TOP_LEVEL_TILED_ORIENTATION_TOP);
+}
+
+static void
+set_tiled_orientation_down(struct weston_keyboard *keyboard,
+			   const struct timespec *time,
+			   uint32_t button, void *data)
+{
+	set_tiled_orientation(keyboard->focus, WESTON_TOP_LEVEL_TILED_ORIENTATION_BOTTOM);
+}
+
 static void
 touch_move_binding(struct weston_touch *touch, const struct timespec *time, void *data)
 {
@@ -4492,6 +4569,15 @@ shell_add_bindings(struct weston_compositor *ec, struct desktop_shell *shell)
 					     mod | MODIFIER_SHIFT,
 					     resize_binding, shell);
 
+	weston_compositor_add_key_binding(ec, KEY_LEFT, mod | MODIFIER_SHIFT,
+					  set_tiled_orientation_left, NULL);
+	weston_compositor_add_key_binding(ec, KEY_RIGHT, mod | MODIFIER_SHIFT,
+					  set_tiled_orientation_right, NULL);
+	weston_compositor_add_key_binding(ec, KEY_UP, mod | MODIFIER_SHIFT,
+					  set_tiled_orientation_up, NULL);
+	weston_compositor_add_key_binding(ec, KEY_DOWN, mod | MODIFIER_SHIFT,
+					  set_tiled_orientation_down, NULL);
+
 	if (ec->capabilities & WESTON_CAP_ROTATION_ANY)
 		weston_compositor_add_button_binding(ec, BTN_MIDDLE, mod,
 						     rotate_binding, NULL);

man/weston-bindings.man

@@ -33,9 +33,24 @@ Kill active window
 Maximize active window
 .P
 .RE
-.B mod + PageUp, mod + PageDown
+.B mod + Shift + KEY_LEFT
 .RS 4
-Zoom desktop in (or out)
+Make the active window tiled left.
+.P
+.RE
+.B mod + Shift + KEY_RIGHT
+.RS 4
+Make the active window tiled right.
+.P
+.RE
+.B mod + Shift + KEY_UP
+.RS 4
+Make the active window tiled top.
+.P
+.RE
+.B mod + Shift + KEY_DOWN
+.RS 4
+Make the active window tiled bottom.
 .P
 .RE
 .B mod + Tab