The Tor Browser / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/widget/gtk/nsAppShell.cpp	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,142 @@
     1.4 +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
     1.5 +/* vim:expandtab:shiftwidth=4:tabstop=4:
     1.6 + */
     1.7 +/* This Source Code Form is subject to the terms of the Mozilla Public
     1.8 + * License, v. 2.0. If a copy of the MPL was not distributed with this
     1.9 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
    1.10 +
    1.11 +#include <sys/types.h>
    1.12 +#include <unistd.h>
    1.13 +#include <fcntl.h>
    1.14 +#include <errno.h>
    1.15 +#include <gdk/gdk.h>
    1.16 +#include "nsAppShell.h"
    1.17 +#include "nsWindow.h"
    1.18 +#include "prlog.h"
    1.19 +#include "prenv.h"
    1.20 +#include "mozilla/HangMonitor.h"
    1.21 +#include "mozilla/unused.h"
    1.22 +#include "GeckoProfiler.h"
    1.23 +
    1.24 +using mozilla::unused;
    1.25 +
    1.26 +#define NOTIFY_TOKEN 0xFA
    1.27 +
    1.28 +#ifdef PR_LOGGING
    1.29 +PRLogModuleInfo *gWidgetLog = nullptr;
    1.30 +PRLogModuleInfo *gWidgetFocusLog = nullptr;
    1.31 +PRLogModuleInfo *gWidgetDragLog = nullptr;
    1.32 +PRLogModuleInfo *gWidgetDrawLog = nullptr;
    1.33 +#endif
    1.34 +
    1.35 +static GPollFunc sPollFunc;
    1.36 +
    1.37 +// Wrapper function to disable hang monitoring while waiting in poll().
    1.38 +static gint
    1.39 +PollWrapper(GPollFD *ufds, guint nfsd, gint timeout_)
    1.40 +{
    1.41 +    mozilla::HangMonitor::Suspend();
    1.42 +    profiler_sleep_start();
    1.43 +    gint result = (*sPollFunc)(ufds, nfsd, timeout_);
    1.44 +    profiler_sleep_end();
    1.45 +    mozilla::HangMonitor::NotifyActivity();
    1.46 +    return result;
    1.47 +}
    1.48 +
    1.49 +/*static*/ gboolean
    1.50 +nsAppShell::EventProcessorCallback(GIOChannel *source, 
    1.51 +                                   GIOCondition condition,
    1.52 +                                   gpointer data)
    1.53 +{
    1.54 +    nsAppShell *self = static_cast<nsAppShell *>(data);
    1.55 +
    1.56 +    unsigned char c;
    1.57 +    unused << read(self->mPipeFDs[0], &c, 1);
    1.58 +    NS_ASSERTION(c == (unsigned char) NOTIFY_TOKEN, "wrong token");
    1.59 +
    1.60 +    self->NativeEventCallback();
    1.61 +    return TRUE;
    1.62 +}
    1.63 +
    1.64 +nsAppShell::~nsAppShell()
    1.65 +{
    1.66 +    if (mTag)
    1.67 +        g_source_remove(mTag);
    1.68 +    if (mPipeFDs[0])
    1.69 +        close(mPipeFDs[0]);
    1.70 +    if (mPipeFDs[1])
    1.71 +        close(mPipeFDs[1]);
    1.72 +}
    1.73 +
    1.74 +nsresult
    1.75 +nsAppShell::Init()
    1.76 +{
    1.77 +#ifdef PR_LOGGING
    1.78 +    if (!gWidgetLog)
    1.79 +        gWidgetLog = PR_NewLogModule("Widget");
    1.80 +    if (!gWidgetFocusLog)
    1.81 +        gWidgetFocusLog = PR_NewLogModule("WidgetFocus");
    1.82 +    if (!gWidgetDragLog)
    1.83 +        gWidgetDragLog = PR_NewLogModule("WidgetDrag");
    1.84 +    if (!gWidgetDrawLog)
    1.85 +        gWidgetDrawLog = PR_NewLogModule("WidgetDraw");
    1.86 +#endif
    1.87 +
    1.88 +    if (!sPollFunc) {
    1.89 +        sPollFunc = g_main_context_get_poll_func(nullptr);
    1.90 +        g_main_context_set_poll_func(nullptr, &PollWrapper);
    1.91 +    }
    1.92 +
    1.93 +    if (PR_GetEnv("MOZ_DEBUG_PAINTS"))
    1.94 +        gdk_window_set_debug_updates(TRUE);
    1.95 +
    1.96 +    int err = pipe(mPipeFDs);
    1.97 +    if (err)
    1.98 +        return NS_ERROR_OUT_OF_MEMORY;
    1.99 +
   1.100 +    GIOChannel *ioc;
   1.101 +    GSource *source;
   1.102 +
   1.103 +    // make the pipe nonblocking
   1.104 +
   1.105 +    int flags = fcntl(mPipeFDs[0], F_GETFL, 0);
   1.106 +    if (flags == -1)
   1.107 +        goto failed;
   1.108 +    err = fcntl(mPipeFDs[0], F_SETFL, flags | O_NONBLOCK);
   1.109 +    if (err == -1)
   1.110 +        goto failed;
   1.111 +    flags = fcntl(mPipeFDs[1], F_GETFL, 0);
   1.112 +    if (flags == -1)
   1.113 +        goto failed;
   1.114 +    err = fcntl(mPipeFDs[1], F_SETFL, flags | O_NONBLOCK);
   1.115 +    if (err == -1)
   1.116 +        goto failed;
   1.117 +
   1.118 +    ioc = g_io_channel_unix_new(mPipeFDs[0]);
   1.119 +    source = g_io_create_watch(ioc, G_IO_IN);
   1.120 +    g_io_channel_unref(ioc);
   1.121 +    g_source_set_callback(source, (GSourceFunc)EventProcessorCallback, this, nullptr);
   1.122 +    g_source_set_can_recurse(source, TRUE);
   1.123 +    mTag = g_source_attach(source, nullptr);
   1.124 +    g_source_unref(source);
   1.125 +
   1.126 +    return nsBaseAppShell::Init();
   1.127 +failed:
   1.128 +    close(mPipeFDs[0]);
   1.129 +    close(mPipeFDs[1]);
   1.130 +    mPipeFDs[0] = mPipeFDs[1] = 0;
   1.131 +    return NS_ERROR_FAILURE;
   1.132 +}
   1.133 +
   1.134 +void
   1.135 +nsAppShell::ScheduleNativeEventCallback()
   1.136 +{
   1.137 +    unsigned char buf[] = { NOTIFY_TOKEN };
   1.138 +    unused << write(mPipeFDs[1], buf, 1);
   1.139 +}
   1.140 +
   1.141 +bool
   1.142 +nsAppShell::ProcessNextNativeEvent(bool mayWait)
   1.143 +{
   1.144 +    return g_main_context_iteration(nullptr, mayWait);
   1.145 +}