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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* 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 "prlog.h"
#include "prenv.h"
#include "mozilla/HangMonitor.h"
#define NOTIFY_TOKEN 0xFA
#ifdef PR_LOGGING
PRLogModuleInfo *gWidgetLog = nullptr;
PRLogModuleInfo *gWidgetFocusLog = nullptr;
PRLogModuleInfo *gWidgetDragLog = nullptr;
PRLogModuleInfo *gWidgetDrawLog = nullptr;
#endif
static GPollFunc sPollFunc;
// Wrapper function to disable hang monitoring while waiting in poll().
static gint
PollWrapper(GPollFD *ufds, guint nfsd, gint timeout_)
{
mozilla::HangMonitor::Suspend();
gint result = (*sPollFunc)(ufds, nfsd, timeout_);
mozilla::HangMonitor::NotifyActivity();
return result;
}
/*static*/ gboolean
nsAppShell::EventProcessorCallback(GIOChannel *source,
GIOCondition condition,
gpointer data)
{
nsAppShell *self = static_cast<nsAppShell *>(data);
unsigned char c;
read(self->mPipeFDs[0], &c, 1);
NS_ASSERTION(c == (unsigned char) NOTIFY_TOKEN, "wrong token");
self->NativeEventCallback();
return TRUE;
}
nsAppShell::~nsAppShell()
{
if (mTag)
g_source_remove(mTag);
if (mPipeFDs[0])
close(mPipeFDs[0]);
if (mPipeFDs[1])
close(mPipeFDs[1]);
}
nsresult
nsAppShell::Init()
{
#ifdef PR_LOGGING
if (!gWidgetLog)
gWidgetLog = PR_NewLogModule("Widget");
if (!gWidgetFocusLog)
gWidgetFocusLog = PR_NewLogModule("WidgetFocus");
if (!gWidgetDragLog)
gWidgetDragLog = PR_NewLogModule("WidgetDrag");
if (!gWidgetDrawLog)
gWidgetDrawLog = PR_NewLogModule("WidgetDraw");
#endif
if (!sPollFunc) {
sPollFunc = g_main_context_get_poll_func(NULL);
g_main_context_set_poll_func(NULL, &PollWrapper);
}
if (PR_GetEnv("MOZ_DEBUG_PAINTS"))
gdk_window_set_debug_updates(TRUE);
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 };
write(mPipeFDs[1], buf, 1);
}
bool
nsAppShell::ProcessNextNativeEvent(bool mayWait)
{
return g_main_context_iteration(NULL, mayWait);
}
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