3 files changed, 75 insertions, 2 deletions

diff --git a/rootston/cursor.c b/rootston/cursor.c
index b153e8c8..d97d518e 100644
--- a/rootston/cursor.c
+++ b/rootston/cursor.c
@@ -39,6 +39,8 @@ static void cursor_set_xcursor_image(struct roots_input *input,
 
 void view_begin_move(struct roots_input *input, struct wlr_cursor *cursor,
 		struct roots_view *view) {
+	view_maximize(view, false);
+
 	input->mode = ROOTS_CURSOR_MOVE;
 	input->offs_x = cursor->x;
 	input->offs_y = cursor->y;
@@ -54,6 +56,8 @@ void view_begin_move(struct roots_input *input, struct wlr_cursor *cursor,
 
 void view_begin_resize(struct roots_input *input, struct wlr_cursor *cursor,
 		struct roots_view *view, uint32_t edges) {
+	view_maximize(view, false);
+
 	input->mode = ROOTS_CURSOR_RESIZE;
 	input->offs_x = cursor->x;
 	input->offs_y = cursor->y;
@@ -74,6 +78,8 @@ void view_begin_resize(struct roots_input *input, struct wlr_cursor *cursor,
 
 void view_begin_rotate(struct roots_input *input, struct wlr_cursor *cursor,
 		struct roots_view *view) {
+	view_maximize(view, false);
+
 	input->mode = ROOTS_CURSOR_ROTATE;
 	input->offs_x = cursor->x;
 	input->offs_y = cursor->y;
@@ -102,7 +108,8 @@ void cursor_update_position(struct roots_input *input, uint32_t time) {
 			set_compositor_cursor = view_client != input->cursor_client;
 		}
 		if (set_compositor_cursor) {
-			struct wlr_xcursor *xcursor = get_default_xcursor(input->xcursor_theme);
+			struct wlr_xcursor *xcursor =
+				get_default_xcursor(input->xcursor_theme);
 			cursor_set_xcursor_image(input, xcursor->images[0]);
 			input->cursor_client = NULL;
 		}
diff --git a/rootston/desktop.c b/rootston/desktop.c
index 29f78ac7..f5d5925b 100644
--- a/rootston/desktop.c
+++ b/rootston/desktop.c
@@ -78,6 +78,50 @@ void view_move_resize(struct roots_view *view, double x, double y,
 	view_resize(view, width, height);
 }
 
+void view_maximize(struct roots_view *view, bool maximized) {
+	if (view->maximized == maximized) {
+		return;
+	}
+
+	if (view->maximize) {
+		view->maximize(view, maximized);
+	}
+
+	if (!view->maximized && maximized) {
+		struct wlr_box view_box;
+		view_get_size(view, &view_box);
+
+		view->maximized = true;
+		view->saved.x = view->x;
+		view->saved.y = view->y;
+		view->saved.rotation = view->rotation;
+		view->saved.width = view_box.width;
+		view->saved.height = view_box.height;
+
+		double output_x, output_y;
+		wlr_output_layout_closest_point(view->desktop->layout, NULL,
+			view->x + (double)view_box.width/2,
+			view->y + (double)view_box.height/2,
+			&output_x, &output_y);
+		struct wlr_output *output = wlr_output_layout_output_at(
+			view->desktop->layout, output_x, output_y);
+		struct wlr_box *output_box =
+			wlr_output_layout_get_box(view->desktop->layout, output);
+
+		view_move_resize(view, output_box->x, output_box->y, output_box->width,
+			output_box->height);
+		view->rotation = 0;
+	}
+
+	if (view->maximized && !maximized) {
+		view->maximized = false;
+
+		view_move_resize(view, view->saved.x, view->saved.y, view->saved.width,
+			view->saved.height);
+		view->rotation = view->saved.rotation;
+	}
+}
+
 void view_close(struct roots_view *view) {
 	if (view->close) {
 		view->close(view);
diff --git a/rootston/xdg_shell_v6.c b/rootston/xdg_shell_v6.c
index ca33c582..45691d16 100644
--- a/rootston/xdg_shell_v6.c
+++ b/rootston/xdg_shell_v6.c
@@ -84,6 +84,16 @@ static void move_resize(struct roots_view *view, double x, double y,
 	wlr_xdg_toplevel_v6_set_size(surf, contrained_width, contrained_height);
 }
 
+static void maximize(struct roots_view *view, bool maximized) {
+	assert(view->type == ROOTS_XDG_SHELL_V6_VIEW);
+	struct wlr_xdg_surface_v6 *surface = view->xdg_surface_v6;
+	if (surface->role != WLR_XDG_SURFACE_V6_ROLE_TOPLEVEL) {
+		return;
+	}
+
+	wlr_xdg_toplevel_v6_set_maximized(surface, maximized);
+}
+
 static void close(struct roots_view *view) {
 	assert(view->type == ROOTS_XDG_SHELL_V6_VIEW);
 	struct wlr_xdg_surface_v6 *surf = view->xdg_surface_v6;
@@ -119,7 +129,18 @@ static void handle_request_resize(struct wl_listener *listener, void *data) {
 }
 
 static void handle_commit(struct wl_listener *listener, void *data) {
-	// TODO is there anything we need to do here?
+	struct roots_xdg_surface_v6 *roots_xdg_surface =
+		wl_container_of(listener, roots_xdg_surface, commit);
+	struct roots_view *view = roots_xdg_surface->view;
+	struct wlr_xdg_surface_v6 *surface = view->xdg_surface_v6;
+
+	if (surface->role != WLR_XDG_SURFACE_V6_ROLE_TOPLEVEL) {
+		return;
+	}
+
+	if (view->maximized != surface->toplevel_state->current.maximized) {
+		view_maximize(view, surface->toplevel_state->current.maximized);
+	}
 }
 
 static void handle_destroy(struct wl_listener *listener, void *data) {
@@ -178,6 +199,7 @@ void handle_xdg_shell_v6_surface(struct wl_listener *listener, void *data) {
 	view->activate = activate;
 	view->resize = resize;
 	view->move_resize = move_resize;
+	view->maximize = maximize;
 	view->close = close;
 	view->desktop = desktop;
 	roots_surface->view = view;