From c5fdd0b0b867e06f143023153d77f3574566957b Mon Sep 17 00:00:00 2001
From: Vegard Matthey <VegardMatthey@protonmail.com>
Date: Sun, 12 Jan 2025 01:09:24 +0100
Subject: [PATCH] Add support for launching applications

---
 menu.c       | 10 +++++---
 menu.h       |  5 ++--
 meson.build  | 32 ++++++++++++++++++++++++
 wmenu-drun.c | 70 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 wmenu-run.c  |  4 +--
 wmenu.c      |  4 +--
 6 files changed, 116 insertions(+), 9 deletions(-)
 create mode 100644 wmenu-drun.c

diff --git a/menu.c b/menu.c
index 9bda76c..49254b3 100644
--- a/menu.c
+++ b/menu.c
@@ -166,7 +166,7 @@ void menu_getopts(struct menu *menu, int argc, char *argv[]) {
 }
 
 // Add an item to the menu.
-void menu_add_item(struct menu *menu, char *text) {
+void menu_add_item(struct menu *menu, char *text, void *app_info) {
 	if ((menu->item_count & (menu->item_count - 1)) == 0) {
 		size_t alloc_size = menu->item_count ? 2 * menu->item_count : 1;
 		void *new_array = realloc(menu->items, sizeof(struct item) * alloc_size);
@@ -179,6 +179,7 @@ void menu_add_item(struct menu *menu, char *text) {
 
 	struct item *new = &menu->items[menu->item_count];
 	new->text = text;
+	new->app_info = app_info;
 
 	menu->item_count++;
 }
@@ -380,6 +381,9 @@ static void match_items(struct menu *menu) {
 void menu_render_items(struct menu *menu) {
 	calc_widths(menu);
 	match_items(menu);
+	if (!(menu->width) || !(menu->height)) {
+		return;
+	}
 	render_menu(menu);
 }
 
@@ -581,10 +585,10 @@ void menu_keypress(struct menu *menu, enum wl_keyboard_key_state key_state,
 	case XKB_KEY_Return:
 	case XKB_KEY_KP_Enter:
 		if (shift) {
-			menu->callback(menu, menu->input, true);
+			menu->callback(menu, menu->input, menu->sel->app_info, true);
 		} else {
 			char *text = menu->sel ? menu->sel->text : menu->input;
-			menu->callback(menu, text, !ctrl);
+			menu->callback(menu, text, menu->sel->app_info, !ctrl);
 		}
 		break;
 	case XKB_KEY_Left:
diff --git a/menu.h b/menu.h
index 8dcd99c..966990e 100644
--- a/menu.h
+++ b/menu.h
@@ -8,11 +8,12 @@
 #include <wayland-client.h>
 
 struct menu;
-typedef void (*menu_callback)(struct menu *menu, char *text, bool exit);
+typedef void (*menu_callback)(struct menu *menu, char *text, void *cmd, bool exit);
 
 // A menu item.
 struct item {
 	char *text;
+	void *app_info;
 	int width;
 	struct item *prev_match; // previous matching item
 	struct item *next_match; // next matching item
@@ -83,7 +84,7 @@ struct menu {
 struct menu *menu_create(menu_callback callback);
 void menu_destroy(struct menu *menu);
 void menu_getopts(struct menu *menu, int argc, char *argv[]);
-void menu_add_item(struct menu *menu, char *text);
+void menu_add_item(struct menu *menu, char *text, void *app_info);
 void menu_sort_and_deduplicate(struct menu *menu);
 void menu_render_items(struct menu *menu);
 void menu_paste(struct menu *menu, const char *text, ssize_t len);
diff --git a/meson.build b/meson.build
index a3b507d..fc39f37 100644
--- a/meson.build
+++ b/meson.build
@@ -19,6 +19,7 @@ add_project_arguments(cc.get_supported_arguments([
 	'-Wno-unused-parameter',
 	'-Wundef',
 	'-Wvla',
+    '-Wno-discarded-qualifiers'
 ]), language : 'c')
 
 cairo           = dependency('cairo')
@@ -27,6 +28,8 @@ pangocairo      = dependency('pangocairo')
 wayland_client  = dependency('wayland-client')
 wayland_protos  = dependency('wayland-protocols')
 xkbcommon       = dependency('xkbcommon')
+glib            = dependency('glib-2.0')
+gio_unix        = dependency('gio-unix-2.0')
 
 rt = cc.find_library('rt')
 
@@ -52,6 +55,8 @@ executable(
 		wayland_client,
 		wayland_protos,
 		xkbcommon,
+        glib,
+        gio_unix,
 	],
 	install: true,
 )
@@ -75,6 +80,33 @@ executable(
 		wayland_client,
 		wayland_protos,
 		xkbcommon,
+        glib,
+        gio_unix,
+	],
+	install: true,
+)
+
+executable(
+	'wmenu-drun',
+	files(
+		'menu.c',
+		'pango.c',
+		'pool-buffer.c',
+		'render.c',
+		'wayland.c',
+		'wmenu-drun.c',
+	),
+	dependencies: [
+		cairo,
+		client_protos,
+		pango,
+		pangocairo,
+		rt,
+		wayland_client,
+		wayland_protos,
+		xkbcommon,
+        glib,
+        gio_unix,
 	],
 	install: true,
 )
diff --git a/wmenu-drun.c b/wmenu-drun.c
new file mode 100644
index 0000000..065ee4e
--- /dev/null
+++ b/wmenu-drun.c
@@ -0,0 +1,70 @@
+#define _POSIX_C_SOURCE 200809L
+#include <dirent.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <gio/gio.h>
+#include <gio/gdesktopappinfo.h>
+
+#include "menu.h"
+#include "wayland.h"
+#include "xdg-activation-v1-client-protocol.h"
+
+static void read_desktop_items(struct menu *menu) {
+	GList* list = g_app_info_get_all();
+	GList* item;
+	for(item = list; item; item = item->next) {
+		if (g_app_info_should_show(item->data) == FALSE) {
+			continue;
+		}
+		const char *name = g_app_info_get_name(item->data);
+		menu_add_item(menu, name, item->data);
+	}
+	menu_sort_and_deduplicate(menu);
+}
+
+struct command {
+	struct menu *menu;
+	GAppInfo *app_info;
+	bool exit;
+};
+
+static void activation_token_done(void *data, struct xdg_activation_token_v1 *activation_token,
+	const char *token) {
+	struct command *cmd = data;
+	GAppLaunchContext *context = g_app_launch_context_new(); // Not strictly necessary.
+	g_app_info_launch(cmd->app_info, NULL, context, NULL);
+	setenv("XDG_ACTIVATION_TOKEN", token, true);
+	xdg_activation_token_v1_destroy(activation_token);
+	cmd->menu->exit = true;
+}
+
+static const struct xdg_activation_token_v1_listener activation_token_listener = {
+	.done = activation_token_done,
+};
+
+static void exec_item(struct menu *menu, char *text, void *app_info, bool exit) {
+	struct command *cmd = calloc(1, sizeof(struct command));
+	cmd->menu = menu;
+	cmd->app_info = (GAppInfo*)app_info;
+	if (cmd->app_info == NULL) {
+		printf("app info is nil\n");
+	}
+	cmd->exit = exit;
+
+	struct xdg_activation_v1 *activation = context_get_xdg_activation(menu->context);
+	struct xdg_activation_token_v1 *activation_token = xdg_activation_v1_get_activation_token(activation);
+	xdg_activation_token_v1_set_surface(activation_token, context_get_surface(menu->context));
+	xdg_activation_token_v1_add_listener(activation_token, &activation_token_listener, cmd);
+	xdg_activation_token_v1_commit(activation_token);
+}
+
+int main(int argc, char *argv[]) {
+	struct menu *menu = menu_create(exec_item);
+	menu_getopts(menu, argc, argv);
+	read_desktop_items(menu);
+	int status = menu_run(menu);
+	menu_destroy(menu);
+	return status;
+}
diff --git a/wmenu-run.c b/wmenu-run.c
index 1b7b8c1..e088ab5 100644
--- a/wmenu-run.c
+++ b/wmenu-run.c
@@ -20,7 +20,7 @@ static void read_items(struct menu *menu) {
 			if (ent->d_name[0] == '.') {
 				continue;
 			}
-			menu_add_item(menu, strdup(ent->d_name));
+			menu_add_item(menu, strdup(ent->d_name), NULL);
 		}
 		closedir(dir);
 	}
@@ -55,7 +55,7 @@ static const struct xdg_activation_token_v1_listener activation_token_listener =
 	.done = activation_token_done,
 };
 
-static void exec_item(struct menu *menu, char *text, bool exit) {
+static void exec_item(struct menu *menu, char *text, void *app_info, bool exit) {
 	struct command *cmd = calloc(1, sizeof(struct command));
 	cmd->menu = menu;
 	cmd->text = strdup(text);
diff --git a/wmenu.c b/wmenu.c
index 38e78b9..04d07a9 100644
--- a/wmenu.c
+++ b/wmenu.c
@@ -13,11 +13,11 @@ static void read_items(struct menu *menu) {
 		if (p) {
 			*p = '\0';
 		}
-		menu_add_item(menu, strdup(buf));
+		menu_add_item(menu, strdup(buf), NULL);
 	}
 }
 
-static void print_item(struct menu *menu, char *text, bool exit) {
+static void print_item(struct menu *menu, char *text, void *app_info, bool exit) {
 	puts(text);
 	fflush(stdout);
 	if (exit) {