client/wayland: Generate library to be imported by panel

Wayland input-method protocol has set_overlay_panel to set
the IBus lookup window near by the text input cursor and
the calling Wayland APIs and calling GUI APIs need to be same PID.

Now `configure --enable-wayland` by default to include
ibuswaylandim.h in C files generated by Vala.

BUG=#2408

client/wayland/IBusWaylandIM-1.0.metadata

@@ -0,0 +1 @@
+IBusWaylandIM cheader_filename="ibuswaylandim.h"

client/wayland/Makefile.am

@@ -3,7 +3,7 @@
 # ibus - The Input Bus
 #
 # Copyright (c) 2007-2013 Peng Huang <shawn.p.huang@gmail.com>
-# Copyright (c) 2019 Takao Fujiwara <takao.fujiwara1@gmail.com>
+# Copyright (c) 2019-2023 Takao Fujiwara <takao.fujiwara1@gmail.com>
 # Copyright (c) 2007-2019 Red Hat, Inc.
 #
 # This library is free software; you can redistribute it and/or modify
@@ -24,6 +24,9 @@
 libibus = $(top_builddir)/src/libibus-@IBUS_API_VERSION@.la
 
 libexec_PROGRAMS = ibus-wayland
+noinst_DATA =
+MAINTAINERCLEANFILES =
+DISTCLEANFILES =
 
 protocol_sources = \
     input-method-unstable-v1-client-protocol.h \
@@ -33,6 +36,8 @@ protocol_sources = \
 ibus_wayland_SOURCES = \
     $(protocol_sources) \
     main.c \
+    ibuswaylandim.c \
+    ibuswaylandim.h \
     $(NULL)
 
 ibus_wayland_DEPENDENCIES = \
@@ -56,10 +61,95 @@ $(libibus):
 	(cd $(top_builddir)/src; make)
 
 EXTRA_DIST = \
-    README \
     $(protocol_sources) \
+    IBusWaylandIM-1.0.metadata \
+    README \
     $(NULL)
 
 -include @wayland_scanner_rules@
 
+# `make distdir` can go to ibus/client/wayland
+if ENABLE_WAYLAND
+if HAVE_INTROSPECTION
+-include $(INTROSPECTION_MAKEFILE)
+
+libibuswaylandim = libibuswaylandim.la
+noinst_LTLIBRARIES = $(libibuswaylandim)
+
+libibuswaylandim_la_CPPFLAGS = \
+    $(GIO2_CFLAGS) \
+    $(WAYLAND_CFLAGS) \
+    -I$(top_srcdir)/src \
+    -I$(top_builddir)/src \
+    $(NULL)
+libibuswaylandim_la_LIBADD = \
+    $(GIO2_LIBS) \
+    $(WAYLAND_LIBS) \
+    $(libibus) \
+    $(NULL)
+libibuswaylandim_la_LDFLAGS =                   \
+    -no-undefined                               \
+    -export-symbols-regex "ibus_wayland_im_.*"  \
+    $(NULL)
+libibuswaylandim_la_SOURCES =  \
+    $(protocol_sources)        \
+    ibuswaylandim.c            \
+    ibuswaylandim.h            \
+    $(NULL)
+
+INTROSPECTION_GIRS = IBusWaylandIM-1.0.gir
+INTROSPECTION_SCANNER_ARGS = \
+    --add-include-path=$(top_srcdir)/src \
+    --add-include-path=$(top_builddir)/src \
+    $(NULL)
+INTROSPECTION_COMPILER_ARGS = \
+    --includedir=$(srcdir)    \
+    --includedir=.            \
+    $(NULL)
+noinst_DATA += $(INTROSPECTION_GIRS)
+EXTRA_DIST += $(INTROSPECTION_GIRS)
+MAINTAINERCLEANFILES += $(INTROSPECTION_GIRS)
+DISTCLEANFILES += $(INTROSPECTION_GIRS)
+$(INTROSPECTION_GIRS): $(libibus) $(libibuswaylandim) Makefile
+IBusWaylandIM_1_0_gir_SCANNERFLAGS =    \
+    --pkg-export=ibus-1.0               \
+    --pkg=gobject-2.0                   \
+    $(IBUS_GIR_SCANNERFLAGS)            \
+    $(NULL)
+IBusWaylandIM_1_0_gir_INCLUDES = GLib-2.0 GObject-2.0 Gio-2.0
+IBusWaylandIM_1_0_gir_LIBS = $(libibus) $(libibuswaylandim)
+IBusWaylandIM_1_0_gir_FILES =      \
+    ibuswaylandim.h                \
+    $(NULL)
+IBusWaylandIM_1_0_gir_CFLAGS =                  \
+    -I$(srcdir)                                 \
+    -I$(builddir)                               \
+    -I$(top_srcdir)/src                         \
+    -I$(top_builddir)/src                       \
+    $(NULL)
+
+-include $(VAPIGEN_MAKEFILE)
+VAPIGEN_VAPIS = ibus-wayland-im-1.0.vapi
+VAPIGEN_VAPIDIRS = \
+    $(top_srcdir)/bindings/vala \
+    $(top_builddir)/bindings/vala \
+    $(NULL)
+VAPIGEN_GIRDIRS = \
+    $(top_srcdir)/src \
+    $(NULL)
+noinst_DATA += $(VAPIGEN_VAPIS)
+EXTRA_DIST += $(VAPIGEN_VAPIS)
+MAINTAINERCLEANFILES += $(VAPIGEN_VAPIS)
+DISTCLEANFILES += $(VAPIGEN_VAPIS)
+$(VAPIGEN_VAPIS): $(INTROSPECTION_GIRS)
+ibus_wayland_im_1_0_vapi_DEPS = glib-2.0 gobject-2.0 gio-2.0 ibus-1.0
+ibus_waylayd_im_1_0_vapi_METADATADIRS = $(srcdir) $(top_srcdir)/bindings/vala
+#ibus_waylayd_im_1_0_vapi_VAPIDIRS = $(top_srcdir)/bindings/vala
+ibus_wayland_im_1_0_vapi_FILES = $(INTROSPECTION_GIRS)
+
+endif
+#end of HAVE_INTROSPECTION
+endif
+#end of ENABLE_WAYLAND
+
 -include $(top_srcdir)/git.mk