feat: add XDG autostart support for automatic application launching

feat: implement demo mode for automated feature showcase
feat: add XEmbed system tray protocol for external application icons
feat: add window snapping to left and right halves
feat: add minimize/restore toggle with Alt+F9 keybinding
docs: update README with new features and configuration details
build: update build system for new autostart and demo modules

include/atoms.h

@@ -76,6 +76,8 @@ typedef struct {
 
     Atom NET_SYSTEM_TRAY_OPCODE;
     Atom NET_SYSTEM_TRAY_S0;
+    Atom NET_SYSTEM_TRAY_ORIENTATION;
+    Atom NET_SYSTEM_TRAY_VISUAL;
     Atom MANAGER;
     Atom XEMBED;
     Atom XEMBED_INFO;
@@ -130,4 +132,6 @@ void atoms_send_protocol(Window window, Atom protocol, Time timestamp);
 void atoms_send_client_message(Window window, Atom message_type,
                                long data0, long data1, long data2, long data3, long data4);
 
+bool atoms_update_wm_state(Window window, Atom state, bool add);
+
 #endif

include/autostart.h

@@ -0,0 +1,14 @@
+/*
+ * DWN - Desktop Window Manager
+ * retoor <retoor@molodetz.nl>
+ * XDG Autostart support
+ */
+
+#ifndef DWN_AUTOSTART_H
+#define DWN_AUTOSTART_H
+
+void autostart_init(void);
+void autostart_run(void);
+void autostart_cleanup(void);
+
+#endif

include/config.h

@@ -54,6 +54,10 @@ struct Config {
 
     char config_path[512];
     char log_path[512];
+
+    bool autostart_enabled;
+    bool autostart_xdg;
+    char autostart_path[512];
 };
 
 Config *config_create(void);

include/demo.h

@@ -0,0 +1,36 @@
+/*
+ * DWN - Desktop Window Manager
+ * retoor <retoor@molodetz.nl>
+ * Demo mode - automated feature showcase
+ */
+
+#ifndef DWN_DEMO_H
+#define DWN_DEMO_H
+
+#include <stdbool.h>
+
+typedef enum {
+    DEMO_IDLE,
+    DEMO_INTRO,
+    DEMO_WINDOW_MGMT,
+    DEMO_WORKSPACES,
+    DEMO_LAYOUTS,
+    DEMO_SNAPPING,
+    DEMO_PANELS,
+    DEMO_AI,
+    DEMO_NEWS,
+    DEMO_SHORTCUTS,
+    DEMO_COMPLETE
+} DemoPhase;
+
+void demo_init(void);
+void demo_cleanup(void);
+void demo_start(void);
+void demo_stop(void);
+void demo_update(void);
+bool demo_is_active(void);
+DemoPhase demo_get_phase(void);
+int demo_get_step(void);
+const char *demo_get_phase_name(DemoPhase phase);
+
+#endif

include/keys.h

@@ -50,6 +50,7 @@ void key_cycle_layout(void);
 void key_toggle_floating(void);
 void key_toggle_fullscreen(void);
 void key_toggle_maximize(void);
+void key_toggle_minimize(void);
 void key_focus_next(void);
 void key_focus_prev(void);
 void key_workspace_next(void);
@@ -80,6 +81,9 @@ void key_toggle_ai(void);
 void key_ai_command(void);
 void key_show_shortcuts(void);
 void key_start_tutorial(void);
+void key_snap_left(void);
+void key_snap_right(void);
+void key_start_demo(void);
 
 void tutorial_start(void);
 void tutorial_stop(void);

include/panel.h

@@ -45,6 +45,7 @@ Client *panel_hit_test_taskbar(Panel *panel, int x, int y);
 void panel_show(Panel *panel);
 void panel_hide(Panel *panel);
 void panel_toggle(Panel *panel);
+void panel_raise_all(void);
 
 void panel_update_clock(void);
 

include/systray.h

@@ -1,7 +1,7 @@
 /*
  * DWN - Desktop Window Manager
  * retoor <retoor@molodetz.nl>
- * System tray widgets (WiFi, Audio, etc.)
+ * System tray widgets (WiFi, Audio, etc.) and XEmbed protocol
  */
 
 #ifndef DWN_SYSTRAY_H
@@ -11,6 +11,35 @@
 #include <stdbool.h>
 
 #define MAX_WIFI_NETWORKS 20
+#define MAX_TRAY_ICONS 32
+#define TRAY_ICON_SIZE 22
+#define TRAY_ICON_SPACING 4
+
+#define SYSTEM_TRAY_REQUEST_DOCK    0
+#define SYSTEM_TRAY_BEGIN_MESSAGE   1
+#define SYSTEM_TRAY_CANCEL_MESSAGE  2
+
+#define XEMBED_EMBEDDED_NOTIFY      0
+#define XEMBED_WINDOW_ACTIVATE      1
+#define XEMBED_WINDOW_DEACTIVATE    2
+#define XEMBED_REQUEST_FOCUS        3
+#define XEMBED_FOCUS_IN             4
+#define XEMBED_FOCUS_OUT            5
+
+#define XEMBED_MAPPED               (1 << 0)
+#define XEMBED_PROTOCOL_VERSION     0
+
+typedef struct {
+    Window window;
+    int x;
+    int width;
+    int height;
+    bool mapped;
+} TrayIcon;
+
+extern TrayIcon tray_icons[MAX_TRAY_ICONS];
+extern int tray_icon_count;
+extern Window tray_selection_owner;
 
 typedef struct {
     char ssid[64];
@@ -114,4 +143,16 @@ void systray_unlock(void);
 BatteryState systray_get_battery_snapshot(void);
 AudioState systray_get_audio_snapshot(void);
 
+void xembed_init(void);
+void xembed_cleanup(void);
+bool xembed_dock_icon(Window icon_win);
+void xembed_remove_icon(Window icon_win);
+TrayIcon *xembed_find_icon(Window icon_win);
+void xembed_send_message(Window icon, long message, long detail, long data1, long data2);
+int xembed_get_icons_width(void);
+void xembed_render_icons(Panel *panel, int x);
+void xembed_handle_click(int x, int y, int button);
+int xembed_hit_test(int x);
+void xembed_update_icon_state(Window icon_win);
+
 #endif