Wayland: Require xkbcommon 0.5.0 or greater

The Wayland backend now requires xkbcommon-compose, which was added in
version 0.5.0.  xkbcommon 0.5.0 was released in 2014.

This removes the non-composing fallback path for text input.

docs/compat.dox

@@ -104,9 +104,8 @@ integration by libwayland-egl, and keyboard handling by
 from wayland-protocols to provide additional features if the compositor
 supports them.
 
-GLFW uses xkbcommon 0.5.0 to provide compose key support.  When it has been
-built against an older xkbcommon, the compose key will be disabled even if it
-has been configured in the compositor.
+GLFW uses xkbcommon 0.5.0 to provide key and text input support.  Earlier
+versions are not supported.
 
 GLFW uses the [xdg-shell
 protocol](https://cgit.freedesktop.org/wayland/wayland-protocols/tree/stable/xdg-shell/xdg-shell.xml)

src/CMakeLists.txt

@@ -65,10 +65,6 @@ endif()
 if (GLFW_BUILD_WAYLAND)
     include(CheckIncludeFiles)
     include(CheckFunctionExists)
-    check_include_files(xkbcommon/xkbcommon-compose.h HAVE_XKBCOMMON_COMPOSE_H)
-    if (HAVE_XKBCOMMON_COMPOSE_H)
-        target_compile_definitions(glfw PRIVATE HAVE_XKBCOMMON_COMPOSE_H)
-    endif()
     check_function_exists(memfd_create HAVE_MEMFD_CREATE)
     if (HAVE_MEMFD_CREATE)
         target_compile_definitions(glfw PRIVATE HAVE_MEMFD_CREATE)
@@ -173,7 +169,7 @@ if (GLFW_BUILD_WAYLAND)
         wayland-client>=0.2.7
         wayland-cursor>=0.2.7
         wayland-egl>=0.2.7
-        xkbcommon)
+        xkbcommon>=0.5.0)
 
     target_include_directories(glfw PRIVATE ${Wayland_INCLUDE_DIRS})
 

src/wl_init.c

@@ -377,11 +377,8 @@ static void keyboardHandleKeymap(void* data,
 {
     struct xkb_keymap* keymap;
     struct xkb_state* state;
-
-#ifdef HAVE_XKBCOMMON_COMPOSE_H
     struct xkb_compose_table* composeTable;
     struct xkb_compose_state* composeState;
-#endif
 
     char* mapStr;
     const char* locale;
@@ -430,7 +427,6 @@ static void keyboardHandleKeymap(void* data,
     if (!locale)
         locale = "C";
 
-#ifdef HAVE_XKBCOMMON_COMPOSE_H
     composeTable =
         xkb_compose_table_new_from_locale(_glfw.wl.xkb.context, locale,
                                           XKB_COMPOSE_COMPILE_NO_FLAGS);
@@ -450,7 +446,6 @@ static void keyboardHandleKeymap(void* data,
         _glfwInputError(GLFW_PLATFORM_ERROR,
                         "Wayland: Failed to create XKB compose table");
     }
-#endif
 
     xkb_keymap_unref(_glfw.wl.xkb.keymap);
     xkb_state_unref(_glfw.wl.xkb.state);
@@ -520,7 +515,6 @@ static int toGLFWKeyCode(uint32_t key)
     return GLFW_KEY_UNKNOWN;
 }
 
-#ifdef HAVE_XKBCOMMON_COMPOSE_H
 static xkb_keysym_t composeSymbol(xkb_keysym_t sym)
 {
     if (sym == XKB_KEY_NoSymbol || !_glfw.wl.xkb.composeState)
@@ -540,7 +534,6 @@ static xkb_keysym_t composeSymbol(xkb_keysym_t sym)
             return sym;
     }
 }
-#endif
 
 static GLFWbool inputChar(_GLFWwindow* window, uint32_t scancode)
 {
@@ -549,11 +542,7 @@ static GLFWbool inputChar(_GLFWwindow* window, uint32_t scancode)
 
     if (xkb_state_key_get_syms(_glfw.wl.xkb.state, keycode, &keysyms) == 1)
     {
-#ifdef HAVE_XKBCOMMON_COMPOSE_H
         const xkb_keysym_t keysym = composeSymbol(keysyms[0]);
-#else
-        const xkb_keysym_t keysym = keysyms[0];
-#endif
         const uint32_t codepoint = _glfwKeySym2Unicode(keysym);
         if (codepoint != GLFW_INVALID_CODEPOINT)
         {
@@ -1299,8 +1288,6 @@ int _glfwInitWayland(void)
         _glfwPlatformGetModuleSymbol(_glfw.wl.xkb.handle, "xkb_state_serialize_mods");
     _glfw.wl.xkb.state_key_get_layout = (PFN_xkb_state_key_get_layout)
         _glfwPlatformGetModuleSymbol(_glfw.wl.xkb.handle, "xkb_state_key_get_layout");
-
-#ifdef HAVE_XKBCOMMON_COMPOSE_H
     _glfw.wl.xkb.compose_table_new_from_locale = (PFN_xkb_compose_table_new_from_locale)
         _glfwPlatformGetModuleSymbol(_glfw.wl.xkb.handle, "xkb_compose_table_new_from_locale");
     _glfw.wl.xkb.compose_table_unref = (PFN_xkb_compose_table_unref)
@@ -1315,7 +1302,6 @@ int _glfwInitWayland(void)
         _glfwPlatformGetModuleSymbol(_glfw.wl.xkb.handle, "xkb_compose_state_get_status");
     _glfw.wl.xkb.compose_state_get_one_sym = (PFN_xkb_compose_state_get_one_sym)
         _glfwPlatformGetModuleSymbol(_glfw.wl.xkb.handle, "xkb_compose_state_get_one_sym");
-#endif
 
     _glfw.wl.registry = wl_display_get_registry(_glfw.wl.display);
     wl_registry_add_listener(_glfw.wl.registry, &registryListener, NULL);
@@ -1403,10 +1389,8 @@ void _glfwTerminateWayland(void)
         _glfw.wl.egl.handle = NULL;
     }
 
-#ifdef HAVE_XKBCOMMON_COMPOSE_H
     if (_glfw.wl.xkb.composeState)
         xkb_compose_state_unref(_glfw.wl.xkb.composeState);
-#endif
     if (_glfw.wl.xkb.keymap)
         xkb_keymap_unref(_glfw.wl.xkb.keymap);
     if (_glfw.wl.xkb.state)

src/wl_platform.h

@@ -26,9 +26,7 @@
 
 #include <wayland-client-core.h>
 #include <xkbcommon/xkbcommon.h>
-#ifdef HAVE_XKBCOMMON_COMPOSE_H
 #include <xkbcommon/xkbcommon-compose.h>
-#endif
 
 typedef VkFlags VkWaylandSurfaceCreateFlagsKHR;
 
@@ -184,7 +182,6 @@ typedef xkb_layout_index_t (* PFN_xkb_state_key_get_layout)(struct xkb_state*,xk
 #define xkb_state_serialize_mods _glfw.wl.xkb.state_serialize_mods
 #define xkb_state_key_get_layout _glfw.wl.xkb.state_key_get_layout
 
-#ifdef HAVE_XKBCOMMON_COMPOSE_H
 typedef struct xkb_compose_table* (* PFN_xkb_compose_table_new_from_locale)(struct xkb_context*, const char*, enum xkb_compose_compile_flags);
 typedef void (* PFN_xkb_compose_table_unref)(struct xkb_compose_table*);
 typedef struct xkb_compose_state* (* PFN_xkb_compose_state_new)(struct xkb_compose_table*, enum xkb_compose_state_flags);
@@ -199,7 +196,6 @@ typedef xkb_keysym_t (* PFN_xkb_compose_state_get_one_sym)(struct xkb_compose_st
 #define xkb_compose_state_feed _glfw.wl.xkb.compose_state_feed
 #define xkb_compose_state_get_status _glfw.wl.xkb.compose_state_get_status
 #define xkb_compose_state_get_one_sym _glfw.wl.xkb.compose_state_get_one_sym
-#endif
 
 #define _GLFW_DECORATION_WIDTH 4
 #define _GLFW_DECORATION_TOP 24
@@ -323,9 +319,7 @@ typedef struct _GLFWlibraryWayland
         struct xkb_keymap*      keymap;
         struct xkb_state*       state;
 
-#ifdef HAVE_XKBCOMMON_COMPOSE_H
         struct xkb_compose_state* composeState;
-#endif
 
         xkb_mod_mask_t          controlMask;
         xkb_mod_mask_t          altMask;
@@ -349,7 +343,6 @@ typedef struct _GLFWlibraryWayland
         PFN_xkb_state_serialize_mods state_serialize_mods;
         PFN_xkb_state_key_get_layout state_key_get_layout;
 
-#ifdef HAVE_XKBCOMMON_COMPOSE_H
         PFN_xkb_compose_table_new_from_locale compose_table_new_from_locale;
         PFN_xkb_compose_table_unref compose_table_unref;
         PFN_xkb_compose_state_new compose_state_new;
@@ -357,7 +350,6 @@ typedef struct _GLFWlibraryWayland
         PFN_xkb_compose_state_feed compose_state_feed;
         PFN_xkb_compose_state_get_status compose_state_get_status;
         PFN_xkb_compose_state_get_one_sym compose_state_get_one_sym;
-#endif
     } xkb;
 
     _GLFWwindow*                pointerFocus;