From fc910ae892b58afaac5a1d1181757fac28ccfb20 Mon Sep 17 00:00:00 2001
From: ManoloFLTK <41016272+ManoloFLTK@users.noreply.github.com>
Date: Wed, 3 Jul 2024 17:57:55 +0200
Subject: [PATCH] Wayland: fix interactive moving and resizing of a subwindow -
 cont'd (#1003)

---
 .../Wayland/Fl_Wayland_Gl_Window_Driver.cxx   |  2 +-
 .../Wayland/Fl_Wayland_Window_Driver.cxx      | 38 ++++++++-----------
 2 files changed, 16 insertions(+), 24 deletions(-)

diff --git a/src/drivers/Wayland/Fl_Wayland_Gl_Window_Driver.cxx b/src/drivers/Wayland/Fl_Wayland_Gl_Window_Driver.cxx
index d25738ab3..56fc55535 100644
--- a/src/drivers/Wayland/Fl_Wayland_Gl_Window_Driver.cxx
+++ b/src/drivers/Wayland/Fl_Wayland_Gl_Window_Driver.cxx
@@ -328,7 +328,7 @@ void Fl_Wayland_Gl_Window_Driver::swap_buffers() {
   }
 
   if (egl_surface) {
-    if (pWindow->parent()) {
+    if (pWindow->parent()) { // issue #976
       struct wld_window *xid = fl_wl_xid(pWindow);
       if (xid->frame_cb) return;
       xid->frame_cb = wl_surface_frame(xid->wl_surface);
diff --git a/src/drivers/Wayland/Fl_Wayland_Window_Driver.cxx b/src/drivers/Wayland/Fl_Wayland_Window_Driver.cxx
index 8f8eb12b8..ffc97ceae 100644
--- a/src/drivers/Wayland/Fl_Wayland_Window_Driver.cxx
+++ b/src/drivers/Wayland/Fl_Wayland_Window_Driver.cxx
@@ -1792,22 +1792,17 @@ void Fl_Wayland_Window_Driver::resize(int X, int Y, int W, int H) {
   if (shown() && !(parent() || popup_window())) {
     X = Y = 0;
   }
-  struct wld_window *parent_xid = parent() ? fl_wl_xid(pWindow->window()) : NULL;
-  // This condition delays application of new X,Y,W,H values if
-  // a non-GL subwindow is being committed.
-  if (!parent_xid || !parent_xid->frame_cb || pWindow->as_gl_window()) {
-    if (is_a_resize) {
-      if (pWindow->parent()) {
-        if (W < 1) W = 1;
-        if (H < 1) H = 1;
-      }
-      pWindow->Fl_Group::resize(X,Y,W,H);
-      //fprintf(stderr, "resize: win=%p to %dx%d\n", pWindow, W, H);
-      if (shown()) {pWindow->redraw();}
-    } else {
-      x(X); y(Y);
-      //fprintf(stderr, "move win=%p to %dx%d\n", pWindow, X, Y);
+  if (is_a_resize) {
+    if (pWindow->parent()) {
+      if (W < 1) W = 1;
+      if (H < 1) H = 1;
     }
+    pWindow->Fl_Group::resize(X,Y,W,H);
+    //fprintf(stderr, "resize: win=%p to %dx%d\n", pWindow, W, H);
+    if (shown()) {pWindow->redraw();}
+  } else {
+    x(X); y(Y);
+    //fprintf(stderr, "move win=%p to %dx%d\n", pWindow, X, Y);
   }
 
   if (shown()) {
@@ -1865,15 +1860,12 @@ void Fl_Wayland_Window_Driver::resize(int X, int Y, int W, int H) {
     }
   }
 
+  struct wld_window *parent_xid = parent() ? fl_wl_xid(pWindow->window()) : NULL;
   if (fl_win && parent_xid) {
-    if (!parent_xid->frame_cb && !pWindow->as_gl_window()) {
-      // Interactive move or resize of a subwindow requires to commit the parent surface
-      // and requires to make sure the parent surface is ready to accept a new commit (#987).
-      parent_xid->frame_cb = wl_surface_frame(parent_xid->wl_surface);
-      wl_callback_add_listener(parent_xid->frame_cb,
-                                Fl_Wayland_Graphics_Driver::p_surface_frame_listener, parent_xid);
-      wl_surface_commit(parent_xid->wl_surface);
-    }
+    if (pWindow->as_gl_window() && fl_win->frame_cb) {
+      wl_callback_destroy(fl_win->frame_cb);
+      fl_win->frame_cb = NULL;
+    } else wl_surface_commit(parent_xid->wl_surface);
     checkSubwindowFrame(); // make sure subwindow doesn't leak outside parent
   }
 }