[Qemu-devel] [PATCH] gtk: cleanup backend dependencies

[Gerd Hoffmann <kraxel@redhat.com>]

Make configure detect gtk x11 backend and link libX11 then.  Make
gtk backend specific code properly #ifdef'ed on the GTK_WINDOWING_*
backends at runtime).  Our gtk ui code should build and run fine on
any platform now.

This also fixes the linker failute due to the new XkbGetKeyboard call
added by commit 3158a3482b0093e41f2b2596fba50774ea31ae08.

Cc: Richard Henderson <rth@twiddle.net>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 configure |  4 +++
 ui/gtk.c  | 97 ++++++++++++++++++++++++++++++++++++---------------------------
 2 files changed, 60 insertions(+), 41 deletions(-)

diff --git a/configure b/configure
index 0e516f9..871452e 100755
--- a/configure
+++ b/configure
@@ -1986,6 +1986,7 @@ fi
 
 if test "$gtk" != "no"; then
     gtkpackage="gtk+-$gtkabi"
+    gtkx11package="gtk+-x11-$gtkabi"
     if test "$gtkabi" = "3.0" ; then
       gtkversion="3.0.0"
     else
@@ -1996,6 +1997,9 @@ if test "$gtk" != "no"; then
         gtk_libs=`$pkg_config --libs $gtkpackage`
         libs_softmmu="$gtk_libs $libs_softmmu"
         gtk="yes"
+        if $pkg_config --exists "$gtkx11package >= $gtkversion"; then
+            gtk_libs="$gtk_libs -lX11"
+        fi
     elif test "$gtk" = "yes"; then
         feature_not_found "gtk" "Install gtk2 or gtk3 devel"
     else
diff --git a/ui/gtk.c b/ui/gtk.c
index 9d06df3..3490999 100644
--- a/ui/gtk.c
+++ b/ui/gtk.c
@@ -68,7 +68,7 @@
 #include "keymaps.h"
 #include "sysemu/char.h"
 #include "qom/object.h"
-#ifndef _WIN32
+#ifdef GDK_WINDOWING_X11
 #include <gdk/gdkx.h>
 #include <X11/XKBlib.h>
 #endif
@@ -112,6 +112,13 @@ static inline void gdk_drawable_get_size(GdkWindow *w, gint *ww, gint *wh)
 #define gtk_widget_get_realized(widget) GTK_WIDGET_REALIZED(widget)
 #endif
 
+#ifndef GDK_IS_X11_DISPLAY
+#define GDK_IS_X11_DISPLAY(dpy) (dpy == dpy)
+#endif
+#ifndef GDK_IS_WIN32_DISPLAY
+#define GDK_IS_WIN32_DISPLAY(dpy) (dpy == dpy)
+#endif
+
 #ifndef GDK_KEY_0
 #define GDK_KEY_0 GDK_0
 #define GDK_KEY_1 GDK_1
@@ -922,37 +929,43 @@ static gboolean gd_key_event(GtkWidget *widget, GdkEventKey *key, void *opaque)
 {
     VirtualConsole *vc = opaque;
     GtkDisplayState *s = vc->s;
+    GdkDisplay *dpy = gtk_widget_get_display(widget);
     int gdk_keycode = key->hardware_keycode;
+    int qemu_keycode = 0;
     int i;
 
-#ifdef _WIN32
-    UINT qemu_keycode = MapVirtualKey(gdk_keycode, MAPVK_VK_TO_VSC);
-    switch (qemu_keycode) {
-    case 103:   /* alt gr */
-        qemu_keycode = 56 | SCANCODE_GREY;
-        break;
+#ifdef GDK_WINDOWING_WIN32
+    if (GDK_IS_WIN32_DISPLAY(dpy)) {
+        qemu_keycode = MapVirtualKey(gdk_keycode, MAPVK_VK_TO_VSC);
+        switch (qemu_keycode) {
+        case 103:   /* alt gr */
+            qemu_keycode = 56 | SCANCODE_GREY;
+            break;
+        }
     }
-#else
-    int qemu_keycode;
-
-    if (gdk_keycode < 9) {
-        qemu_keycode = 0;
-    } else if (gdk_keycode < 97) {
-        qemu_keycode = gdk_keycode - 8;
-    } else if (gdk_keycode < 158) {
-        if (s->has_evdev) {
-            qemu_keycode = translate_evdev_keycode(gdk_keycode - 97);
+#endif
+
+    if (qemu_keycode == 0) {
+        if (gdk_keycode < 9) {
+            qemu_keycode = 0;
+        } else if (gdk_keycode < 97) {
+            qemu_keycode = gdk_keycode - 8;
+#ifdef GDK_WINDOWING_X11
+        } else if (GDK_IS_X11_DISPLAY(dpy) && gdk_keycode < 158) {
+            if (s->has_evdev) {
+                qemu_keycode = translate_evdev_keycode(gdk_keycode - 97);
+            } else {
+                qemu_keycode = translate_xfree86_keycode(gdk_keycode - 97);
+            }
+#endif
+        } else if (gdk_keycode == 208) { /* Hiragana_Katakana */
+            qemu_keycode = 0x70;
+        } else if (gdk_keycode == 211) { /* backslash */
+            qemu_keycode = 0x73;
         } else {
-            qemu_keycode = translate_xfree86_keycode(gdk_keycode - 97);
+            qemu_keycode = 0;
         }
-    } else if (gdk_keycode == 208) { /* Hiragana_Katakana */
-        qemu_keycode = 0x70;
-    } else if (gdk_keycode == 211) { /* backslash */
-        qemu_keycode = 0x73;
-    } else {
-        qemu_keycode = 0;
     }
-#endif
 
     trace_gd_key_event(vc->label, gdk_keycode, qemu_keycode,
                        (key->type == GDK_KEY_PRESS) ? "down" : "up");
@@ -1822,23 +1835,25 @@ static void gd_create_menus(GtkDisplayState *s)
 
 static void gd_set_keycode_type(GtkDisplayState *s)
 {
-#ifndef _WIN32
-    char *keycodes = NULL;
+#ifdef GDK_WINDOWING_X11
     GdkDisplay *display = gtk_widget_get_display(s->window);
-    Display *x11_display = gdk_x11_display_get_xdisplay(display);
-    XkbDescPtr desc = XkbGetKeyboard(x11_display, XkbGBN_AllComponentsMask,
-                                     XkbUseCoreKbd);
-
-    if (desc && desc->names) {
-        keycodes = XGetAtomName(x11_display, desc->names->keycodes);
-    }
-    if (keycodes == NULL) {
-        fprintf(stderr, "could not lookup keycode name\n");
-    } else if (strstart(keycodes, "evdev", NULL)) {
-        s->has_evdev = true;
-    } else if (!strstart(keycodes, "xfree86", NULL)) {
-        fprintf(stderr, "unknown keycodes `%s', please report to "
-                "qemu-devel@nongnu.org\n", keycodes);
+    if (GDK_IS_X11_DISPLAY(display)) {
+        Display *x11_display = gdk_x11_display_get_xdisplay(display);
+        XkbDescPtr desc = XkbGetKeyboard(x11_display, XkbGBN_AllComponentsMask,
+                                         XkbUseCoreKbd);
+        char *keycodes = NULL;
+
+        if (desc && desc->names) {
+            keycodes = XGetAtomName(x11_display, desc->names->keycodes);
+        }
+        if (keycodes == NULL) {
+            fprintf(stderr, "could not lookup keycode name\n");
+        } else if (strstart(keycodes, "evdev", NULL)) {
+            s->has_evdev = true;
+        } else if (!strstart(keycodes, "xfree86", NULL)) {
+            fprintf(stderr, "unknown keycodes `%s', please report to "
+                    "qemu-devel@nongnu.org\n", keycodes);
+        }
     }
 #endif
 }
-- 
1.8.3.1