michael@0: /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
michael@0: /* vim:expandtab:shiftwidth=4:tabstop=4:
michael@0:  */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include <sys/types.h>
michael@0: #include <unistd.h>
michael@0: #include <fcntl.h>
michael@0: #include <errno.h>
michael@0: #include <gdk/gdk.h>
michael@0: #include "nsAppShell.h"
michael@0: #include "nsWindow.h"
michael@0: #include "prlog.h"
michael@0: #include "prenv.h"
michael@0: #include "mozilla/HangMonitor.h"
michael@0: #include "mozilla/unused.h"
michael@0: #include "GeckoProfiler.h"
michael@0: 
michael@0: using mozilla::unused;
michael@0: 
michael@0: #define NOTIFY_TOKEN 0xFA
michael@0: 
michael@0: #ifdef PR_LOGGING
michael@0: PRLogModuleInfo *gWidgetLog = nullptr;
michael@0: PRLogModuleInfo *gWidgetFocusLog = nullptr;
michael@0: PRLogModuleInfo *gWidgetDragLog = nullptr;
michael@0: PRLogModuleInfo *gWidgetDrawLog = nullptr;
michael@0: #endif
michael@0: 
michael@0: static GPollFunc sPollFunc;
michael@0: 
michael@0: // Wrapper function to disable hang monitoring while waiting in poll().
michael@0: static gint
michael@0: PollWrapper(GPollFD *ufds, guint nfsd, gint timeout_)
michael@0: {
michael@0:     mozilla::HangMonitor::Suspend();
michael@0:     profiler_sleep_start();
michael@0:     gint result = (*sPollFunc)(ufds, nfsd, timeout_);
michael@0:     profiler_sleep_end();
michael@0:     mozilla::HangMonitor::NotifyActivity();
michael@0:     return result;
michael@0: }
michael@0: 
michael@0: /*static*/ gboolean
michael@0: nsAppShell::EventProcessorCallback(GIOChannel *source, 
michael@0:                                    GIOCondition condition,
michael@0:                                    gpointer data)
michael@0: {
michael@0:     nsAppShell *self = static_cast<nsAppShell *>(data);
michael@0: 
michael@0:     unsigned char c;
michael@0:     unused << read(self->mPipeFDs[0], &c, 1);
michael@0:     NS_ASSERTION(c == (unsigned char) NOTIFY_TOKEN, "wrong token");
michael@0: 
michael@0:     self->NativeEventCallback();
michael@0:     return TRUE;
michael@0: }
michael@0: 
michael@0: nsAppShell::~nsAppShell()
michael@0: {
michael@0:     if (mTag)
michael@0:         g_source_remove(mTag);
michael@0:     if (mPipeFDs[0])
michael@0:         close(mPipeFDs[0]);
michael@0:     if (mPipeFDs[1])
michael@0:         close(mPipeFDs[1]);
michael@0: }
michael@0: 
michael@0: nsresult
michael@0: nsAppShell::Init()
michael@0: {
michael@0: #ifdef PR_LOGGING
michael@0:     if (!gWidgetLog)
michael@0:         gWidgetLog = PR_NewLogModule("Widget");
michael@0:     if (!gWidgetFocusLog)
michael@0:         gWidgetFocusLog = PR_NewLogModule("WidgetFocus");
michael@0:     if (!gWidgetDragLog)
michael@0:         gWidgetDragLog = PR_NewLogModule("WidgetDrag");
michael@0:     if (!gWidgetDrawLog)
michael@0:         gWidgetDrawLog = PR_NewLogModule("WidgetDraw");
michael@0: #endif
michael@0: 
michael@0:     if (!sPollFunc) {
michael@0:         sPollFunc = g_main_context_get_poll_func(nullptr);
michael@0:         g_main_context_set_poll_func(nullptr, &PollWrapper);
michael@0:     }
michael@0: 
michael@0:     if (PR_GetEnv("MOZ_DEBUG_PAINTS"))
michael@0:         gdk_window_set_debug_updates(TRUE);
michael@0: 
michael@0:     int err = pipe(mPipeFDs);
michael@0:     if (err)
michael@0:         return NS_ERROR_OUT_OF_MEMORY;
michael@0: 
michael@0:     GIOChannel *ioc;
michael@0:     GSource *source;
michael@0: 
michael@0:     // make the pipe nonblocking
michael@0: 
michael@0:     int flags = fcntl(mPipeFDs[0], F_GETFL, 0);
michael@0:     if (flags == -1)
michael@0:         goto failed;
michael@0:     err = fcntl(mPipeFDs[0], F_SETFL, flags | O_NONBLOCK);
michael@0:     if (err == -1)
michael@0:         goto failed;
michael@0:     flags = fcntl(mPipeFDs[1], F_GETFL, 0);
michael@0:     if (flags == -1)
michael@0:         goto failed;
michael@0:     err = fcntl(mPipeFDs[1], F_SETFL, flags | O_NONBLOCK);
michael@0:     if (err == -1)
michael@0:         goto failed;
michael@0: 
michael@0:     ioc = g_io_channel_unix_new(mPipeFDs[0]);
michael@0:     source = g_io_create_watch(ioc, G_IO_IN);
michael@0:     g_io_channel_unref(ioc);
michael@0:     g_source_set_callback(source, (GSourceFunc)EventProcessorCallback, this, nullptr);
michael@0:     g_source_set_can_recurse(source, TRUE);
michael@0:     mTag = g_source_attach(source, nullptr);
michael@0:     g_source_unref(source);
michael@0: 
michael@0:     return nsBaseAppShell::Init();
michael@0: failed:
michael@0:     close(mPipeFDs[0]);
michael@0:     close(mPipeFDs[1]);
michael@0:     mPipeFDs[0] = mPipeFDs[1] = 0;
michael@0:     return NS_ERROR_FAILURE;
michael@0: }
michael@0: 
michael@0: void
michael@0: nsAppShell::ScheduleNativeEventCallback()
michael@0: {
michael@0:     unsigned char buf[] = { NOTIFY_TOKEN };
michael@0:     unused << write(mPipeFDs[1], buf, 1);
michael@0: }
michael@0: 
michael@0: bool
michael@0: nsAppShell::ProcessNextNativeEvent(bool mayWait)
michael@0: {
michael@0:     return g_main_context_iteration(nullptr, mayWait);
michael@0: }