From 49c3b6d4fe28064bb7a0f2a0dadd56ea1f833e18 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Miroslav=20=C5=A0ediv=C3=BD?= <sedivy.miro@gmail.com>
Date: Tue, 12 Jan 2021 00:09:43 +0100
Subject: [PATCH] xevent: OnWindowCreated.

---
 internal/desktop/xevent.go        |  4 ++++
 internal/desktop/xevent/xevent.c  | 17 +++++++++++++++++
 internal/desktop/xevent/xevent.go | 11 +++++++++++
 internal/desktop/xevent/xevent.h  |  2 ++
 internal/types/desktop.go         |  1 +
 internal/websocket/manager.go     |  9 +++++++++
 6 files changed, 44 insertions(+)

diff --git a/internal/desktop/xevent.go b/internal/desktop/xevent.go
index 972c4e43..f59f2025 100644
--- a/internal/desktop/xevent.go
+++ b/internal/desktop/xevent.go
@@ -12,6 +12,10 @@ func (manager *DesktopManagerCtx) OnClipboardUpdated(listener func()) {
 	xevent.OnClipboardUpdated(listener)
 }
 
+func (manager *DesktopManagerCtx) OnWindowCreated(listener func(window uint32, name string, role string)) {
+	xevent.OnWindowCreated(listener)
+}
+
 func (manager *DesktopManagerCtx) OnEventError(listener func(error_code uint8, message string, request_code uint8, minor_code uint8)) {
 	xevent.OnEventError(listener)
 }
diff --git a/internal/desktop/xevent/xevent.c b/internal/desktop/xevent/xevent.c
index 31216026..f7d9e870 100644
--- a/internal/desktop/xevent/xevent.c
+++ b/internal/desktop/xevent/xevent.c
@@ -27,6 +27,7 @@ void XEventLoop(char *name) {
   XA_CLIPBOARD = XInternAtom(display, "CLIPBOARD", 0);
   XFixesSelectSelectionInput(display, root, XA_CLIPBOARD, XFixesSetSelectionOwnerNotifyMask);
   XFixesSelectCursorInput(display, root, XFixesDisplayCursorNotifyMask);
+  XSelectInput(display, root, SubstructureNotifyMask);
 
   XSync(display, 0);
   XSetErrorHandler(XEventError);
@@ -52,6 +53,22 @@ void XEventLoop(char *name) {
         continue;
       }
     }
+
+    // XFixesSelectionNotifyEvent
+    if (event.type == CreateNotify) {
+      char *name;
+      XFetchName(display, event.xcreatewindow.window, &name);
+ 
+      char *role;
+      XTextProperty text_data;
+      Atom atom = XInternAtom(display, "WM_WINDOW_ROLE", True);
+      int status = XGetTextProperty(display, event.xcreatewindow.window, &text_data, atom);
+      role = (char *)text_data.value;
+    
+      goXEventWindowCreated(event.xcreatewindow, name, role);
+      XFree(name);
+      continue;
+    }
   }
 
   XCloseDisplay(display);
diff --git a/internal/desktop/xevent/xevent.go b/internal/desktop/xevent/xevent.go
index 3c24701b..467baa14 100644
--- a/internal/desktop/xevent/xevent.go
+++ b/internal/desktop/xevent/xevent.go
@@ -38,6 +38,12 @@ func OnClipboardUpdated(listener func()) {
 	})
 }
 
+func OnWindowCreated(listener func(window uint32, name string, role string)) {
+	emmiter.On("window-created", func(payload ...interface{}) {
+		listener(payload[0].(uint32), payload[1].(string), payload[2].(string))
+	})
+}
+
 func OnEventError(listener func(error_code uint8, message string, request_code uint8, minor_code uint8)) {
 	emmiter.On("event-error", func(payload ...interface{}) {
 		listener(payload[0].(uint8), payload[1].(string), payload[2].(uint8), payload[3].(uint8))
@@ -54,6 +60,11 @@ func goXEventClipboardUpdated() {
 	emmiter.Emit("clipboard-updated")
 }
 
+//export goXEventWindowCreated
+func goXEventWindowCreated(event C.XCreateWindowEvent, name *C.char, role *C.char) {
+	emmiter.Emit("window-created", uint32(event.window), C.GoString(name), C.GoString(role))
+}
+
 //export goXEventError
 func goXEventError(event *C.XErrorEvent, message *C.char) {
 	emmiter.Emit("event-error", uint8(event.error_code), C.GoString(message), uint8(event.request_code), uint8(event.minor_code))
diff --git a/internal/desktop/xevent/xevent.h b/internal/desktop/xevent/xevent.h
index 743061dd..24ee7160 100644
--- a/internal/desktop/xevent/xevent.h
+++ b/internal/desktop/xevent/xevent.h
@@ -1,5 +1,6 @@
 #pragma once
 
+#include <X11/Xutil.h>
 #include <X11/Xatom.h>
 #include <X11/Xlib.h>
 #include <X11/extensions/Xfixes.h>
@@ -7,6 +8,7 @@
 
 extern void goXEventCursorChanged(XFixesCursorNotifyEvent event);
 extern void goXEventClipboardUpdated();
+extern void goXEventWindowCreated(XCreateWindowEvent event, char *name, char *role);
 extern void goXEventError(XErrorEvent *event, char *message);
 extern int goXEventActive();
 
diff --git a/internal/types/desktop.go b/internal/types/desktop.go
index 60a18403..28c81431 100644
--- a/internal/types/desktop.go
+++ b/internal/types/desktop.go
@@ -45,6 +45,7 @@ type DesktopManager interface {
 	// xevent
 	OnCursorChanged(listener func(serial uint64))
 	OnClipboardUpdated(listener func())
+	OnWindowCreated(listener func(window uint32, name string, role string))
 	OnEventError(listener func(error_code uint8, message string, request_code uint8, minor_code uint8))
 
 	// clipboard
diff --git a/internal/websocket/manager.go b/internal/websocket/manager.go
index 9f4df2dc..b7b18014 100644
--- a/internal/websocket/manager.go
+++ b/internal/websocket/manager.go
@@ -133,6 +133,15 @@ func (ws *WebSocketManagerCtx) Start() {
 			ws.logger.Warn().Err(err).Msg("could not sync clipboard")
 		}
 	})
+
+	ws.desktop.OnWindowCreated(func(window uint32, name string, role string) {
+		// TODO: Implement.
+		ws.logger.Info().
+			Uint32("window", window).
+			Str("name", name).
+			Str("role", role).
+			Msg("created new window")
+	})
 }
 
 func (ws *WebSocketManagerCtx) Shutdown() error {