Support a very simple root-menu

include/labwc.h

@@ -38,9 +38,10 @@
 #define XCURSOR_MOVE "grabbing"
 
 enum cursor_mode {
-	LAB_CURSOR_PASSTHROUGH,
+	LAB_CURSOR_PASSTHROUGH = 0,
 	LAB_CURSOR_MOVE,
 	LAB_CURSOR_RESIZE,
+	LAB_INPUT_STATE_MENU,
 };
 
 struct input {
@@ -106,6 +107,8 @@ struct server {
 
 	/* Set when in cycle (alt-tab) mode */
 	struct view *cycle_view;
+
+	struct menu *rootmenu;
 };
 
 struct output {

include/menu/menu.h

@@ -0,0 +1,35 @@
+#ifndef __LABWC_MENU_H
+#define __LABWC_MENU_H
+
+#include <wayland-server.h>
+#include <wlr/render/wlr_renderer.h>
+
+struct menuitem {
+	char *action;
+	char *command;
+	struct wlr_box geo_box;
+	struct wlr_texture *active_texture;
+	struct wlr_texture *inactive_texture;
+	bool selected;
+	struct wl_list link;
+};
+
+struct menu {
+	int x;
+	int y;
+	struct wl_list menuitems;
+};
+
+/* menu_create - create menu */
+void menu_init(struct server *server, struct menu *menu);
+
+/* menu_move - move to position (x, y) */
+void menu_move(struct menu *menu, int x, int y);
+
+/* menu_set_selected - select item at (x, y) */
+void menu_set_selected(struct menu *menu, int x, int y);
+
+/* menu_action_selected - select item at (x, y) */
+void menu_action_selected(struct server *server, struct menu *menu);
+
+#endif /* __LABWC_MENU_H */

src/action.c

@@ -25,7 +25,7 @@ action(struct server *server, const char *action, const char *command)
 			desktop_next_view(server, server->cycle_view);
 	} else if (!strcasecmp(action, "Reconfigure")) {
 		reconfigure();
-	} else if (!strcasecmp(action, "debug-views")) {
+	} else if (!strcasecmp(action, "Debug")) {
 		dbg_show_views(server);
 	} else {
 		warn("action (%s) not supported", action);

src/cursor.c

@@ -1,4 +1,5 @@
 #include "labwc.h"
+#include "menu/menu.h"
 
 static void
 request_cursor_notify(struct wl_listener *listener, void *data)
@@ -108,6 +109,10 @@ process_cursor_motion(struct server *server, uint32_t time)
 	} else if (server->cursor_mode == LAB_CURSOR_RESIZE) {
 		process_cursor_resize(server, time);
 		return;
+	} else if (server->cursor_mode == LAB_INPUT_STATE_MENU) {
+		menu_set_selected(server->rootmenu,
+			server->seat.cursor->x, server->seat.cursor->y);
+		return;
 	}
 
 	/* Otherwise, find the view under the pointer and send the event along.
@@ -240,42 +245,63 @@ cursor_button(struct wl_listener *listener, void *data)
 	double sx, sy;
 	struct wlr_surface *surface;
 	int view_area;
-	struct view *view =
-		desktop_view_at(server, server->seat.cursor->x, server->seat.cursor->y,
-				&surface, &sx, &sy, &view_area);
+	struct view *view = desktop_view_at(server, server->seat.cursor->x,
+		server->seat.cursor->y, &surface, &sx, &sy, &view_area);
+
+	/* handle _release_ */
 	if (event->state == WLR_BUTTON_RELEASED) {
-		/* Exit interactive move/resize mode. */
-		server->cursor_mode = LAB_CURSOR_PASSTHROUGH;
-	} else {
-		/* Focus that client if the button was _pressed_ */
-		desktop_focus_view(&server->seat, view);
-		switch (view_area) {
-		case LAB_DECO_BUTTON_CLOSE:
-			view->impl->close(view);
-			break;
-		case LAB_DECO_BUTTON_ICONIFY:
-			view_minimize(view);
-			break;
-		case LAB_DECO_PART_TITLE:
-			interactive_begin(view, LAB_CURSOR_MOVE, 0);
-			break;
-		case LAB_DECO_PART_TOP:
-			interactive_begin(view, LAB_CURSOR_RESIZE,
-					  WLR_EDGE_TOP);
-			break;
-		case LAB_DECO_PART_RIGHT:
-			interactive_begin(view, LAB_CURSOR_RESIZE,
-					  WLR_EDGE_RIGHT);
-			break;
-		case LAB_DECO_PART_BOTTOM:
-			interactive_begin(view, LAB_CURSOR_RESIZE,
-					  WLR_EDGE_BOTTOM);
-			break;
-		case LAB_DECO_PART_LEFT:
-			interactive_begin(view, LAB_CURSOR_RESIZE,
-					  WLR_EDGE_LEFT);
-			break;
+		if (server->cursor_mode == LAB_INPUT_STATE_MENU) {
+			return;
 		}
+		/* Exit interactive move/resize/menu mode. */
+		server->cursor_mode = LAB_CURSOR_PASSTHROUGH;
+		return;
+	}
+
+	if (server->cursor_mode == LAB_INPUT_STATE_MENU) {
+		menu_action_selected(server, server->rootmenu);
+		server->cursor_mode = LAB_CURSOR_PASSTHROUGH;
+		return;
+	}
+
+	/* handle _press_ on desktop */
+	if (!view) {
+		/* launch root-menu */
+		server->cursor_mode = LAB_INPUT_STATE_MENU;
+		menu_move(server->rootmenu, server->seat.cursor->x,
+			server->seat.cursor->y);
+		return;
+	}
+
+
+	/* Handle _press_ on view */
+	desktop_focus_view(&server->seat, view);
+	switch (view_area) {
+	case LAB_DECO_BUTTON_CLOSE:
+		view->impl->close(view);
+		break;
+	case LAB_DECO_BUTTON_ICONIFY:
+		view_minimize(view);
+		break;
+	case LAB_DECO_PART_TITLE:
+		interactive_begin(view, LAB_CURSOR_MOVE, 0);
+		break;
+	case LAB_DECO_PART_TOP:
+		interactive_begin(view, LAB_CURSOR_RESIZE,
+				  WLR_EDGE_TOP);
+		break;
+	case LAB_DECO_PART_RIGHT:
+		interactive_begin(view, LAB_CURSOR_RESIZE,
+				  WLR_EDGE_RIGHT);
+		break;
+	case LAB_DECO_PART_BOTTOM:
+		interactive_begin(view, LAB_CURSOR_RESIZE,
+				  WLR_EDGE_BOTTOM);
+		break;
+	case LAB_DECO_PART_LEFT:
+		interactive_begin(view, LAB_CURSOR_RESIZE,
+				  WLR_EDGE_LEFT);
+		break;
 	}
 }
 

src/main.c

@@ -3,6 +3,7 @@
 #include "labwc.h"
 #include "theme/theme.h"
 #include "xbm/xbm.h"
+#include "menu/menu.h"
 
 #include <cairo.h>
 #include <pango/pangocairo.h>
@@ -61,6 +62,10 @@ main(int argc, char *argv[])
 	theme_read(rc.theme_name);
 	xbm_load(server.renderer);
 
+	struct menu menu = { 0 };
+	menu_init(&server, &menu);
+	server.rootmenu = &menu;
+
 	session_autostart_init();
 	if (startup_cmd) {
 		spawn_async_no_shell(startup_cmd);

src/menu/menu.c

@@ -0,0 +1,117 @@
+#define _POSIX_C_SOURCE 200809L
+#include <cairo/cairo.h>
+#include <pango/pangocairo.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "labwc.h"
+#include "menu/menu.h"
+
+static float background[4] = { 0.3f, 0.1f, 0.1f, 1.0f };
+static float foreground[4] = { 1.0f, 1.0f, 1.0f, 1.0f };
+static const char font[] = "Sans 11";
+
+struct wlr_texture *
+texture_create(struct server *server, struct wlr_box *geo, const char *text,
+		float *bg, float *fg)
+{
+	cairo_surface_t *surf = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
+		geo->width, geo->height);
+	cairo_t *cairo = cairo_create(surf);
+
+	cairo_set_source_rgb(cairo, bg[0], bg[1], bg[2]);
+	cairo_paint(cairo);
+	cairo_set_source_rgba(cairo, fg[0], fg[1], fg[2], fg[3]);
+	cairo_move_to(cairo, 0, 0);
+
+	PangoLayout *layout = pango_cairo_create_layout(cairo);
+	pango_layout_set_width(layout, geo->width * PANGO_SCALE);
+	pango_layout_set_text(layout, text, -1);
+
+	PangoFontDescription *desc = pango_font_description_from_string(font);
+	pango_layout_set_font_description(layout, desc);
+	pango_font_description_free(desc);
+	pango_cairo_update_layout(cairo, layout);
+	pango_cairo_show_layout(cairo, layout);
+	g_object_unref(layout);
+
+	cairo_surface_flush(surf);
+	unsigned char *data = cairo_image_surface_get_data(surf);
+	struct wlr_texture *texture = wlr_texture_from_pixels(server->renderer,
+		WL_SHM_FORMAT_ARGB8888, cairo_image_surface_get_stride(surf),
+		geo->width, geo->height, data);
+
+	cairo_destroy(cairo);
+	cairo_surface_destroy(surf);
+	return texture;
+}
+
+#define MENUWIDTH (100)
+#define MENUHEIGHT (25)
+
+struct menuitem *
+menuitem_create(struct server *server, struct menu *menu, const char *text,
+	const char *action, const char *command)
+{
+	struct menuitem *menuitem = calloc(1, sizeof(struct menuitem));
+	if (!menuitem) {
+		return NULL;
+	}
+	menuitem->action = action ? strdup(action) : NULL;
+	menuitem->command = command ? strdup(command) : NULL;
+	menuitem->geo_box.width = MENUWIDTH;
+	menuitem->geo_box.height = MENUHEIGHT;
+	menuitem->active_texture = texture_create(server, &menuitem->geo_box,
+		text, background, foreground);
+	menuitem->inactive_texture = texture_create(server, &menuitem->geo_box,
+		text, foreground, background);
+	wl_list_insert(&menu->menuitems, &menuitem->link);
+	return menuitem;
+}
+
+void
+menu_init(struct server *server, struct menu *menu)
+{
+	wl_list_init(&menu->menuitems);
+	menuitem_create(server, menu, "Terminal", "Execute", "sakura");
+	menuitem_create(server, menu, "Reconfigure", "Reconfigure", NULL);
+	menuitem_create(server, menu, "Exit", "Exit", NULL);
+	menu_move(menu, 100, 100);
+}
+
+void
+menu_move(struct menu *menu, int x, int y)
+{
+	menu->x = x;
+	menu->y = y;
+
+	int offset = 0;
+	struct menuitem *menuitem;
+	wl_list_for_each (menuitem, &menu->menuitems, link) {
+		menuitem->geo_box.x = menu->x;
+		menuitem->geo_box.y = menu->y + offset;
+		offset += menuitem->geo_box.height;
+	}
+}
+
+void
+menu_set_selected(struct menu *menu, int x, int y)
+{
+	struct menuitem *menuitem;
+	wl_list_for_each (menuitem, &menu->menuitems, link) {
+		menuitem->selected =
+			wlr_box_contains_point(&menuitem->geo_box, x, y);
+	}
+}
+
+void
+menu_action_selected(struct server *server, struct menu *menu)
+{
+	struct menuitem *menuitem;
+	wl_list_for_each (menuitem, &menu->menuitems, link) {
+		if (menuitem->selected) {
+			action(server, menuitem->action, menuitem->command);
+			break;
+		}
+	}
+}

src/menu/meson.build

@@ -0,0 +1,3 @@
+labwc_sources += files(
+  'menu.c',
+)

src/meson.build

@@ -21,3 +21,4 @@ subdir('common')
 subdir('config')
 subdir('theme')
 subdir('xbm')
+subdir('menu')

src/output.c

@@ -1,6 +1,7 @@
 #define _POSIX_C_SOURCE 200809L
 #include <wlr/types/wlr_xdg_output_v1.h>
 #include "labwc.h"
+#include "menu/menu.h"
 #include "theme/theme.h"
 #include "layers.h"
 
@@ -80,6 +81,29 @@ render_it:
 	draw_rect_unfilled(&dd, box);
 }
 
+static void
+render_rootmenu(struct output *output)
+{
+	struct server *server = output->server;
+	struct draw_data ddata = {
+		.renderer = server->renderer,
+		.transform_matrix = output->wlr_output->transform_matrix,
+	};
+	float matrix[9];
+
+	ddata.rgba = (float[4]){ 0.9, 0.3, 0.3, 0.5 };
+	struct menuitem *menuitem;
+	wl_list_for_each (menuitem, &server->rootmenu->menuitems, link) {
+		struct wlr_texture *t;
+		t = menuitem->selected ? menuitem->active_texture :
+			menuitem->inactive_texture;
+		wlr_matrix_project_box(matrix, &menuitem->geo_box,
+			WL_OUTPUT_TRANSFORM_NORMAL, 0, ddata.transform_matrix);
+		wlr_render_texture_with_matrix(ddata.renderer, t, matrix, 1);
+	}
+
+}
+
 static void
 render_icon(struct draw_data *d, struct wlr_box box,
 	    struct wlr_texture *texture)
@@ -337,6 +361,11 @@ output_frame_notify(struct wl_listener *listener, void *data)
 
 	render_layer(&now, &output->layers[ZWLR_LAYER_SHELL_V1_LAYER_TOP]);
 	render_layer(&now, &output->layers[ZWLR_LAYER_SHELL_V1_LAYER_OVERLAY]);
+
+	if (output->server->cursor_mode == LAB_INPUT_STATE_MENU) {
+		render_rootmenu(output);
+	}
+
 	/* Just in case hardware cursors not supported by GPU */
 	wlr_output_render_software_cursors(output->wlr_output, NULL);