aura: Explicitly disable GTK

base/message_pump_x.cc

Index: base/message_pump_x.cc
diff --git a/base/message_pump_x.cc b/base/message_pump_x.cc
index 8e098af95924e57269b906f21eb7975d926d3c0f..b0be50b69eb202f1dd1f5d1b42a3b781c7d8ce3e 100644
--- a/base/message_pump_x.cc
+++ b/base/message_pump_x.cc
@@ -4,12 +4,15 @@
 
 #include "base/message_pump_x.h"
 
-#include <gdk/gdkx.h>
 #include <X11/extensions/XInput2.h>
 
 #include "base/basictypes.h"
 #include "base/message_loop.h"
 
+#if defined(TOOLKIT_USES_GTK)
+#include <gdk/gdkx.h>
+#endif
+
 namespace {
 
 gboolean XSourcePrepare(GSource* source, gint* timeout_ms) {
@@ -40,10 +43,6 @@ GSourceFuncs XSourceFuncs = {
   NULL
 };
 
-// A flag to disable GTK's message pump. This is intermediate step
-// to remove gtk and will be removed once migration is complete.
-bool use_gtk_message_pump = true;
-
 // The opcode used for checking events.
 int xiopcode = -1;
 
@@ -51,11 +50,17 @@ int xiopcode = -1;
 // connection to the display and owns it.
 Display* g_xdisplay = NULL;
 
+#if defined(TOOLKIT_USES_GTK)
+// A flag to disable GTK's message pump. This is intermediate step
+// to remove gtk and will be removed once migration is complete.
+bool use_gtk_message_pump = true;
+
 gboolean PlaceholderDispatch(GSource* source,
                              GSourceFunc cb,
                              gpointer data) {
   return TRUE;
 }
+#endif  // defined(TOOLKIT_USES_GTK)
 
 void InitializeXInput2(void) {
   Display* display = base::MessagePumpX::GetDefaultXDisplay();
@@ -83,57 +88,62 @@ void InitializeXInput2(void) {
 namespace base {
 
 MessagePumpX::MessagePumpX() : MessagePumpGlib(),
-    x_source_(NULL),
+#if defined(TOOLKIT_USES_GTK)
     gdksource_(NULL),
     dispatching_event_(false),
     capture_x_events_(0),
-    capture_gdk_events_(0) {
+    capture_gdk_events_(0),
+#endif
+    x_source_(NULL) {
+  InitializeXInput2();
+#if defined(TOOLKIT_USES_GTK)
   if (use_gtk_message_pump) {
     gdk_window_add_filter(NULL, &GdkEventFilter, this);
     gdk_event_handler_set(&EventDispatcherX, this, NULL);
   } else {
-    GPollFD* x_poll = new GPollFD();
-    x_poll->fd = ConnectionNumber(g_xdisplay);
-    x_poll->events = G_IO_IN;
-
-    x_source_ = g_source_new(&XSourceFuncs, sizeof(GSource));
-    g_source_add_poll(x_source_, x_poll);
-    g_source_set_can_recurse(x_source_, FALSE);
-    g_source_attach(x_source_, g_main_context_default());
+    InitXSource();
   }
-
-  InitializeXInput2();
   if (use_gtk_message_pump)
     InitializeEventsToCapture();
+#else
+  InitXSource();
+#endif
 }
 
 MessagePumpX::~MessagePumpX() {
+#if defined(TOOLKIT_USES_GTK)
   if (use_gtk_message_pump) {
     gdk_window_remove_filter(NULL, &GdkEventFilter, this);
     gdk_event_handler_set(reinterpret_cast<GdkEventFunc>(gtk_main_do_event),
         this, NULL);
-  } else {
-    g_source_destroy(x_source_);
-    g_source_unref(x_source_);
-    XCloseDisplay(g_xdisplay);
-    g_xdisplay = NULL;
+    return;
   }
+#endif
+
+  g_source_destroy(x_source_);
+  g_source_unref(x_source_);
+  XCloseDisplay(g_xdisplay);
+  g_xdisplay = NULL;
 }
 
+#if defined(TOOLKIT_USES_GTK)
 // static
 void MessagePumpX::DisableGtkMessagePump() {
   use_gtk_message_pump = false;
-  g_xdisplay = XOpenDisplay(NULL);
 }
+#endif
 
 // static
 Display* MessagePumpX::GetDefaultXDisplay() {
+#if defined(TOOLKIT_USES_GTK)
   if (use_gtk_message_pump) {
     static GdkDisplay* display = gdk_display_get_default();
     return display ? GDK_DISPLAY_XDISPLAY(display) : NULL;
-  } else {
-    return g_xdisplay;
   }
+#endif
+  if (!g_xdisplay)
+    g_xdisplay = XOpenDisplay(NULL);
+  return g_xdisplay;
 }
 
 // static
@@ -141,9 +151,24 @@ bool MessagePumpX::HasXInput2() {
   return xiopcode != -1;
 }
 
+void MessagePumpX::InitXSource() {
+  DCHECK(!x_source_);
+  GPollFD* x_poll = new GPollFD();
+  x_poll->fd = ConnectionNumber(g_xdisplay);
+  x_poll->events = G_IO_IN;
+
+  x_source_ = g_source_new(&XSourceFuncs, sizeof(GSource));
+  g_source_add_poll(x_source_, x_poll);
+  g_source_set_can_recurse(x_source_, FALSE);
+  g_source_attach(x_source_, g_main_context_default());
+}
+
 bool MessagePumpX::ShouldCaptureXEvent(XEvent* xev) {
-  return (!use_gtk_message_pump || capture_x_events_[xev->type])
-      && (xev->type != GenericEvent || xev->xcookie.extension == xiopcode);
+  return
+#if defined(TOOLKIT_USES_GTK)
+      (!use_gtk_message_pump || capture_x_events_[xev->type]) &&
+#endif
+      (xev->type != GenericEvent || xev->xcookie.extension == xiopcode);
 }
 
 bool MessagePumpX::ProcessXEvent(XEvent* xev) {
@@ -187,16 +212,19 @@ bool MessagePumpX::RunOnce(GMainContext* context, bool block) {
       XNextEvent(display, &xev);
       if (ProcessXEvent(&xev))
         return true;
+#if defined(TOOLKIT_USES_GTK)
     } else if (use_gtk_message_pump && gdksource_) {
       // TODO(sad): A couple of extra events can still sneak in during this.
       // Those should be sent back to the X queue from the dispatcher
       // EventDispatcherX.
       gdksource_->source_funcs->dispatch = gdkdispatcher_;
       g_main_context_iteration(context, FALSE);
+#endif
     }
   }
 
   bool retvalue;
+#if defined(TOOLKIT_USES_GTK)
   if (gdksource_ && use_gtk_message_pump) {
     // Replace the dispatch callback of the GDK event source temporarily so that
     // it doesn't read events from X.
@@ -212,10 +240,14 @@ bool MessagePumpX::RunOnce(GMainContext* context, bool block) {
   } else {
     retvalue = g_main_context_iteration(context, block);
   }
+#else
+  retvalue = g_main_context_iteration(context, block);
+#endif
 
   return retvalue;
 }
 
+#if defined(TOOLKIT_USES_GTK)
 GdkFilterReturn MessagePumpX::GdkEventFilter(GdkXEvent* gxevent,
                                              GdkEvent* gevent,
                                              gpointer data) {
@@ -279,11 +311,13 @@ void MessagePumpX::InitializeEventsToCapture(void) {
   capture_x_events_[GenericEvent] = true;
 }
 
+COMPILE_ASSERT(XLASTEvent >= LASTEvent, XLASTEvent_too_small);
+
+#endif  // defined(TOOLKIT_USES_GTK)
+
 MessagePumpObserver::EventStatus
     MessagePumpObserver::WillProcessXEvent(XEvent* xev) {
   return EVENT_CONTINUE;
 }
 
-COMPILE_ASSERT(XLASTEvent >= LASTEvent, XLASTEvent_too_small);
-
 }  // namespace base