1 files changed, 253 insertions, 0 deletions
diff --git a/widget/gtk/nsAppShell.cpp b/widget/gtk/nsAppShell.cpp
new file mode 100644
index 0000000000..24bdd50833
--- /dev/null
+++ b/widget/gtk/nsAppShell.cpp
@@ -0,0 +1,253 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:expandtab:shiftwidth=4:tabstop=4:
+ */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include <sys/types.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <gdk/gdk.h>
+#include "nsAppShell.h"
+#include "nsWindow.h"
+#include "mozilla/Logging.h"
+#include "prenv.h"
+#include "mozilla/BackgroundHangMonitor.h"
+#include "mozilla/Hal.h"
+#include "mozilla/Unused.h"
+#include "mozilla/WidgetUtils.h"
+#include "GeckoProfiler.h"
+#include "nsIPowerManagerService.h"
+#ifdef MOZ_ENABLE_DBUS
+#  include "WakeLockListener.h"
+#endif
+#include "gfxPlatform.h"
+#include "ScreenHelperGTK.h"
+#include "HeadlessScreenHelper.h"
+#include "mozilla/widget/ScreenManager.h"
+#ifdef MOZ_WAYLAND
+#  include "nsWaylandDisplay.h"
+#endif
+
+using mozilla::LazyLogModule;
+using mozilla::Unused;
+using mozilla::widget::HeadlessScreenHelper;
+using mozilla::widget::ScreenHelperGTK;
+using mozilla::widget::ScreenManager;
+
+#define NOTIFY_TOKEN 0xFA
+
+LazyLogModule gWidgetLog("Widget");
+LazyLogModule gWidgetFocusLog("WidgetFocus");
+LazyLogModule gWidgetDragLog("WidgetDrag");
+LazyLogModule gWidgetDrawLog("WidgetDraw");
+LazyLogModule gWidgetWaylandLog("WidgetWayland");
+LazyLogModule gDmabufLog("Dmabuf");
+LazyLogModule gClipboardLog("WidgetClipboard");
+
+static GPollFunc sPollFunc;
+
+// Wrapper function to disable hang monitoring while waiting in poll().
+static gint PollWrapper(GPollFD* ufds, guint nfsd, gint timeout_) {
+  mozilla::BackgroundHangMonitor().NotifyWait();
+  gint result;
+  {
+    AUTO_PROFILER_LABEL("PollWrapper", IDLE);
+    AUTO_PROFILER_THREAD_SLEEP;
+    result = (*sPollFunc)(ufds, nfsd, timeout_);
+  }
+  mozilla::BackgroundHangMonitor().NotifyActivity();
+  return result;
+}
+
+// Emit resume-events on GdkFrameClock if flush-events has not been
+// balanced by resume-events at dispose.
+// For https://bugzilla.gnome.org/show_bug.cgi?id=742636
+static decltype(GObjectClass::constructed) sRealGdkFrameClockConstructed;
+static decltype(GObjectClass::dispose) sRealGdkFrameClockDispose;
+static GQuark sPendingResumeQuark;
+
+static void OnFlushEvents(GObject* clock, gpointer) {
+  g_object_set_qdata(clock, sPendingResumeQuark, GUINT_TO_POINTER(1));
+}
+
+static void OnResumeEvents(GObject* clock, gpointer) {
+  g_object_set_qdata(clock, sPendingResumeQuark, nullptr);
+}
+
+static void WrapGdkFrameClockConstructed(GObject* object) {
+  sRealGdkFrameClockConstructed(object);
+
+  g_signal_connect(object, "flush-events", G_CALLBACK(OnFlushEvents), nullptr);
+  g_signal_connect(object, "resume-events", G_CALLBACK(OnResumeEvents),
+                   nullptr);
+}
+
+static void WrapGdkFrameClockDispose(GObject* object) {
+  if (g_object_get_qdata(object, sPendingResumeQuark)) {
+    g_signal_emit_by_name(object, "resume-events");
+  }
+
+  sRealGdkFrameClockDispose(object);
+}
+
+/*static*/
+gboolean nsAppShell::EventProcessorCallback(GIOChannel* source,
+                                            GIOCondition condition,
+                                            gpointer data) {
+  nsAppShell* self = static_cast<nsAppShell*>(data);
+
+  unsigned char c;
+  Unused << read(self->mPipeFDs[0], &c, 1);
+  NS_ASSERTION(c == (unsigned char)NOTIFY_TOKEN, "wrong token");
+
+  self->NativeEventCallback();
+  return TRUE;
+}
+
+nsAppShell::~nsAppShell() {
+  mozilla::hal::Shutdown();
+
+  if (mTag) g_source_remove(mTag);
+  if (mPipeFDs[0]) close(mPipeFDs[0]);
+  if (mPipeFDs[1]) close(mPipeFDs[1]);
+}
+
+nsresult nsAppShell::Init() {
+  mozilla::hal::Init();
+
+#ifdef MOZ_ENABLE_DBUS
+  if (XRE_IsParentProcess()) {
+    nsCOMPtr<nsIPowerManagerService> powerManagerService =
+        do_GetService(POWERMANAGERSERVICE_CONTRACTID);
+
+    if (powerManagerService) {
+      powerManagerService->AddWakeLockListener(
+          WakeLockListener::GetSingleton());
+    } else {
+      NS_WARNING(
+          "Failed to retrieve PowerManagerService, wakelocks will be broken!");
+    }
+  }
+#endif
+
+  if (!sPollFunc) {
+    sPollFunc = g_main_context_get_poll_func(nullptr);
+    g_main_context_set_poll_func(nullptr, &PollWrapper);
+  }
+
+  if (XRE_IsParentProcess()) {
+    ScreenManager& screenManager = ScreenManager::GetSingleton();
+    if (gfxPlatform::IsHeadless()) {
+      screenManager.SetHelper(mozilla::MakeUnique<HeadlessScreenHelper>());
+    } else {
+      screenManager.SetHelper(mozilla::MakeUnique<ScreenHelperGTK>());
+    }
+
+    if (gtk_check_version(3, 16, 3) == nullptr) {
+      // Before 3.16.3, GDK cannot override classname by --class command line
+      // option when program uses gdk_set_program_class().
+      //
+      // See https://bugzilla.gnome.org/show_bug.cgi?id=747634
+      //
+      // Only bother doing this for the parent process, since it's the one
+      // creating top-level windows. (At this point, a child process hasn't
+      // received the list of registered chrome packages, so the
+      // GetBrandShortName call would fail anyway.)
+      nsAutoString brandName;
+      mozilla::widget::WidgetUtils::GetBrandShortName(brandName);
+      if (!brandName.IsEmpty()) {
+        gdk_set_program_class(NS_ConvertUTF16toUTF8(brandName).get());
+      }
+    }
+  }
+
+  if (!sPendingResumeQuark &&
+      gtk_check_version(3, 14, 7) != nullptr) {  // GTK 3.0 to GTK 3.14.7.
+    // GTK 3.8 - 3.14 registered this type when creating the frame clock
+    // for the root window of the display when the display was opened.
+    GType gdkFrameClockIdleType = g_type_from_name("GdkFrameClockIdle");
+    if (gdkFrameClockIdleType) {  // not in versions prior to 3.8
+      sPendingResumeQuark = g_quark_from_string("moz-resume-is-pending");
+      auto gdk_frame_clock_idle_class =
+          G_OBJECT_CLASS(g_type_class_peek_static(gdkFrameClockIdleType));
+      auto constructed = &gdk_frame_clock_idle_class->constructed;
+      sRealGdkFrameClockConstructed = *constructed;
+      *constructed = WrapGdkFrameClockConstructed;
+      auto dispose = &gdk_frame_clock_idle_class->dispose;
+      sRealGdkFrameClockDispose = *dispose;
+      *dispose = WrapGdkFrameClockDispose;
+    }
+  }
+
+  // Workaround for bug 1209659 which is fixed by Gtk3.20
+  if (gtk_check_version(3, 20, 0) != nullptr) {
+    unsetenv("GTK_CSD");
+  }
+
+  if (PR_GetEnv("MOZ_DEBUG_PAINTS")) {
+    gdk_window_set_debug_updates(TRUE);
+  }
+
+  // Whitelist of only common, stable formats - see bugs 1197059 and 1203078
+  GSList* pixbufFormats = gdk_pixbuf_get_formats();
+  for (GSList* iter = pixbufFormats; iter; iter = iter->next) {
+    GdkPixbufFormat* format = static_cast<GdkPixbufFormat*>(iter->data);
+    gchar* name = gdk_pixbuf_format_get_name(format);
+    if (strcmp(name, "jpeg") && strcmp(name, "png") && strcmp(name, "gif") &&
+        strcmp(name, "bmp") && strcmp(name, "ico") && strcmp(name, "xpm") &&
+        strcmp(name, "svg")) {
+      gdk_pixbuf_format_set_disabled(format, TRUE);
+    }
+    g_free(name);
+  }
+  g_slist_free(pixbufFormats);
+
+  int err = pipe(mPipeFDs);
+  if (err) return NS_ERROR_OUT_OF_MEMORY;
+
+  GIOChannel* ioc;
+  GSource* source;
+
+  // make the pipe nonblocking
+
+  int flags = fcntl(mPipeFDs[0], F_GETFL, 0);
+  if (flags == -1) goto failed;
+  err = fcntl(mPipeFDs[0], F_SETFL, flags | O_NONBLOCK);
+  if (err == -1) goto failed;
+  flags = fcntl(mPipeFDs[1], F_GETFL, 0);
+  if (flags == -1) goto failed;
+  err = fcntl(mPipeFDs[1], F_SETFL, flags | O_NONBLOCK);
+  if (err == -1) goto failed;
+
+  ioc = g_io_channel_unix_new(mPipeFDs[0]);
+  source = g_io_create_watch(ioc, G_IO_IN);
+  g_io_channel_unref(ioc);
+  g_source_set_callback(source, (GSourceFunc)EventProcessorCallback, this,
+                        nullptr);
+  g_source_set_can_recurse(source, TRUE);
+  mTag = g_source_attach(source, nullptr);
+  g_source_unref(source);
+
+  return nsBaseAppShell::Init();
+failed:
+  close(mPipeFDs[0]);
+  close(mPipeFDs[1]);
+  mPipeFDs[0] = mPipeFDs[1] = 0;
+  return NS_ERROR_FAILURE;
+}
+
+void nsAppShell::ScheduleNativeEventCallback() {
+  unsigned char buf[] = {NOTIFY_TOKEN};
+  Unused << write(mPipeFDs[1], buf, 1);
+}
+
+bool nsAppShell::ProcessNextNativeEvent(bool mayWait) {
+  bool ret = g_main_context_iteration(nullptr, mayWait);
+#ifdef MOZ_WAYLAND
+  mozilla::widget::WaylandDispatchDisplays();
+#endif
+  return ret;
+}