alien-everywhere/patches/mobile-mutter/0005-wayland-text-input-replace-focus-for-aliendalvik-wit.patch

From 02767d9d81bb167f7621189bcf3044910ab4daee Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jonas=20Dre=C3=9Fler?= <verdre@v0yd.nl>
Date: Wed, 20 Dec 2023 09:50:57 +0100
Subject: [PATCH 5/5] wayland/text-input: replace focus for aliendalvik with
 another client

While there is wl_text_input v3 support in Aliendalvik, the implementation
is so broken it's impossible to use, even with workarounds in the
compositor.

Instead we don't use wl_text_input for Aliendalvik clients at all (we force
disable the protocol in libwayland) and trick aliendalvik into using the
dbus based protocol that's used on Sailfish OS. We shim this dbus
based protocol in the alienkeyboard-maliit-shim. This process also acts as
a wayland client for wl_text_input, and acts as a drop-in for wl_text_input
of the aliendalvik surface.

This patch implements a really crude "magic string"-based solution for
wayland clients to take over wl_text_input handling for the current surface.

This is a really bad hack, and it's quite insecure (every client knowing the
magic string can take over handling, not just the shimming script).
---
 src/wayland/meta-wayland-text-input.c | 93 +++++++++++++++++++++++----
 1 file changed, 81 insertions(+), 12 deletions(-)

diff --git a/src/wayland/meta-wayland-text-input.c b/src/wayland/meta-wayland-text-input.c
index 8d67e29be..0b55e2c25 100644
--- a/src/wayland/meta-wayland-text-input.c
+++ b/src/wayland/meta-wayland-text-input.c
@@ -81,6 +81,9 @@ struct _MetaWaylandTextInput
   } preedit;
 
   guint done_idle_id;
+
+ struct wl_resource *magic_resource;
+
 };
 
 struct _MetaWaylandTextInputFocus
@@ -306,6 +309,12 @@ meta_wayland_text_input_focus_new (MetaWaylandTextInput *text_input)
 
   return CLUTTER_INPUT_FOCUS (focus);
 }
+static void
+move_resources (struct wl_list *destination, struct wl_list *source)
+{
+  wl_list_insert_list (destination, source);
+  wl_list_init (source);
+}
 
 static void
 text_input_handle_focus_surface_destroy (struct wl_listener *listener,
@@ -313,17 +322,54 @@ text_input_handle_focus_surface_destroy (struct wl_listener *listener,
 {
   MetaWaylandTextInput *text_input = wl_container_of (listener, text_input,
 						      surface_listener);
+g_warning("MUTTER: text input on focus surface destroy");
 
-  meta_wayland_text_input_set_focus (text_input, NULL);
-}
+  text_input->pending_state = META_WAYLAND_PENDING_STATE_NONE;
+
+  if (text_input->surface)
+    {
+      if (!wl_list_empty (&text_input->focus_resource_list))
+        {
+          ClutterInputFocus *focus = text_input->input_focus;
+          ClutterInputMethod *input_method;
+          struct wl_resource *resource;
+
+          if (clutter_input_focus_is_focused (focus))
+            {
+              input_method = clutter_backend_get_input_method (clutter_get_default_backend ());
+              clutter_input_focus_reset (focus);
+              meta_wayland_text_input_focus_flush_done (focus);
+              clutter_input_method_focus_out (input_method);
+            }
+
+          wl_resource_for_each (resource, &text_input->focus_resource_list)
+            {
+              if (resource != text_input->magic_resource)
+                {
+                  zwp_text_input_v3_send_leave (resource,
+                                                text_input->surface->resource);
+                }
+            }
+
+          move_resources (&text_input->resource_list,
+                          &text_input->focus_resource_list);
+
+          if (text_input->magic_resource)
+            {
+              g_warning("INPUT: tehre's a magic resource though,readding");
+              wl_list_remove (wl_resource_get_link (text_input->magic_resource));
+              wl_list_insert (&text_input->focus_resource_list, wl_resource_get_link (text_input->magic_resource));
+            }
+
+        }
+
+      wl_list_remove (&text_input->surface_listener.link);
+      text_input->surface = NULL;
+    }
 
-static void
-move_resources (struct wl_list *destination, struct wl_list *source)
-{
-  wl_list_insert_list (destination, source);
-  wl_list_init (source);
 }
 
+
 static void
 move_resources_for_client (struct wl_list *destination,
 			   struct wl_list *source,
@@ -367,10 +413,12 @@ meta_wayland_text_input_set_focus (MetaWaylandTextInput *text_input,
 
           wl_resource_for_each (resource, &text_input->focus_resource_list)
             {
-g_warning("MUTTER sending text input leave to surface %p res %p", text_input->surface, text_input->surface->resource);
-if (text_input->surface->resource)
-              zwp_text_input_v3_send_leave (resource,
-                                            text_input->surface->resource);
+              g_warning("MUTTER sending text input leave to surface %p res %p", text_input->surface, text_input->surface->resource);
+              if (text_input->surface->resource && resource != text_input->magic_resource)
+                {
+                  zwp_text_input_v3_send_leave (resource,
+                                                text_input->surface->resource);
+                }
             }
 
           move_resources (&text_input->resource_list,
@@ -400,6 +448,7 @@ if (text_input->surface->resource)
 
           wl_resource_for_each (resource, &text_input->focus_resource_list)
             {
+if (resource != text_input->magic_resource)
               zwp_text_input_v3_send_enter (resource, surface->resource);
             }
         }
@@ -413,6 +462,12 @@ text_input_destructor (struct wl_resource *resource)
 
   g_hash_table_remove (text_input->resource_serials, resource);
   wl_list_remove (wl_resource_get_link (resource));
+
+  if (text_input->magic_resource == resource)
+    {
+      g_warning("INPUT: The magic resource got destroyed, unsettng");
+      text_input->magic_resource = NULL;
+    }
 }
 
 static void
@@ -429,6 +484,11 @@ client_matches_focus (MetaWaylandTextInput *text_input,
   if (!text_input->surface)
     return FALSE;
 
+  if (text_input->magic_resource &&
+      client == wl_resource_get_client (text_input->magic_resource))
+    return TRUE;
+
+
   return client == wl_resource_get_client (text_input->surface->resource);
 }
 
@@ -467,6 +527,14 @@ text_input_set_surrounding_text (struct wl_client   *client,
 {
   MetaWaylandTextInput *text_input = wl_resource_get_user_data (resource);
 
+  if (g_strcmp0 (text, "magictext") == 0)
+    {
+      g_warning("INPUT GOT THE MAGIC TEXT, inserting us into focus list");
+      text_input->magic_resource = resource;
+      wl_list_remove (wl_resource_get_link (text_input->magic_resource));
+      wl_list_insert (&text_input->focus_resource_list, wl_resource_get_link (text_input->magic_resource));
+    }
+
   if (!client_matches_focus (text_input, client))
     return;
 
@@ -717,6 +785,7 @@ meta_wayland_text_input_new (MetaWaylandSeat *seat)
 void
 meta_wayland_text_input_destroy (MetaWaylandTextInput *text_input)
 {
+g_warning("MUTTER text input itself destroy, setting to NULL");
   meta_wayland_text_input_set_focus (text_input, NULL);
   g_object_unref (text_input->input_focus);
   g_hash_table_destroy (text_input->resource_serials);
@@ -746,7 +815,7 @@ meta_wayland_text_input_create_new_resource (MetaWaylandTextInput *text_input,
     {
       wl_list_insert (&text_input->focus_resource_list,
                       wl_resource_get_link (text_input_resource));
-
+if (text_input_resource != text_input->magic_resource)
       zwp_text_input_v3_send_enter (text_input_resource,
                                     text_input->surface->resource);
     }
-- 
2.43.0