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widget/gtk/nsAppShell.cpp@b8a032363ba2 (annotated)

widget/gtk/nsAppShell.cpp

Thu, 22 Jan 2015 13:21:57 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Thu, 22 Jan 2015 13:21:57 +0100

branch

TOR_BUG_9701

changeset 15

b8a032363ba2

permissions

-rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

michael@0	1	/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
michael@0	2	/* vim:expandtab:shiftwidth=4:tabstop=4:
michael@0	3	*/
michael@0	4	/* This Source Code Form is subject to the terms of the Mozilla Public
michael@0	5	* License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0	6	* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0	7
michael@0	8	#include <sys/types.h>
michael@0	9	#include <unistd.h>
michael@0	10	#include <fcntl.h>
michael@0	11	#include <errno.h>
michael@0	12	#include <gdk/gdk.h>
michael@0	13	#include "nsAppShell.h"
michael@0	14	#include "nsWindow.h"
michael@0	15	#include "prlog.h"
michael@0	16	#include "prenv.h"
michael@0	17	#include "mozilla/HangMonitor.h"
michael@0	18	#include "mozilla/unused.h"
michael@0	19	#include "GeckoProfiler.h"
michael@0	20
michael@0	21	using mozilla::unused;
michael@0	22
michael@0	23	#define NOTIFY_TOKEN 0xFA
michael@0	24
michael@0	25	#ifdef PR_LOGGING
michael@0	26	PRLogModuleInfo *gWidgetLog = nullptr;
michael@0	27	PRLogModuleInfo *gWidgetFocusLog = nullptr;
michael@0	28	PRLogModuleInfo *gWidgetDragLog = nullptr;
michael@0	29	PRLogModuleInfo *gWidgetDrawLog = nullptr;
michael@0	30	#endif
michael@0	31
michael@0	32	static GPollFunc sPollFunc;
michael@0	33
michael@0	34	// Wrapper function to disable hang monitoring while waiting in poll().
michael@0	35	static gint
michael@0	36	PollWrapper(GPollFD *ufds, guint nfsd, gint timeout_)
michael@0	37	{
michael@0	38	mozilla::HangMonitor::Suspend();
michael@0	39	profiler_sleep_start();
michael@0	40	gint result = (*sPollFunc)(ufds, nfsd, timeout_);
michael@0	41	profiler_sleep_end();
michael@0	42	mozilla::HangMonitor::NotifyActivity();
michael@0	43	return result;
michael@0	44	}
michael@0	45
michael@0	46	/*static*/ gboolean
michael@0	47	nsAppShell::EventProcessorCallback(GIOChannel *source,
michael@0	48	GIOCondition condition,
michael@0	49	gpointer data)
michael@0	50	{
michael@0	51	nsAppShell *self = static_cast<nsAppShell *>(data);
michael@0	52
michael@0	53	unsigned char c;
michael@0	54	unused << read(self->mPipeFDs[0], &c, 1);
michael@0	55	NS_ASSERTION(c == (unsigned char) NOTIFY_TOKEN, "wrong token");
michael@0	56
michael@0	57	self->NativeEventCallback();
michael@0	58	return TRUE;
michael@0	59	}
michael@0	60
michael@0	61	nsAppShell::~nsAppShell()
michael@0	62	{
michael@0	63	if (mTag)
michael@0	64	g_source_remove(mTag);
michael@0	65	if (mPipeFDs[0])
michael@0	66	close(mPipeFDs[0]);
michael@0	67	if (mPipeFDs[1])
michael@0	68	close(mPipeFDs[1]);
michael@0	69	}
michael@0	70
michael@0	71	nsresult
michael@0	72	nsAppShell::Init()
michael@0	73	{
michael@0	74	#ifdef PR_LOGGING
michael@0	75	if (!gWidgetLog)
michael@0	76	gWidgetLog = PR_NewLogModule("Widget");
michael@0	77	if (!gWidgetFocusLog)
michael@0	78	gWidgetFocusLog = PR_NewLogModule("WidgetFocus");
michael@0	79	if (!gWidgetDragLog)
michael@0	80	gWidgetDragLog = PR_NewLogModule("WidgetDrag");
michael@0	81	if (!gWidgetDrawLog)
michael@0	82	gWidgetDrawLog = PR_NewLogModule("WidgetDraw");
michael@0	83	#endif
michael@0	84
michael@0	85	if (!sPollFunc) {
michael@0	86	sPollFunc = g_main_context_get_poll_func(nullptr);
michael@0	87	g_main_context_set_poll_func(nullptr, &PollWrapper);
michael@0	88	}
michael@0	89
michael@0	90	if (PR_GetEnv("MOZ_DEBUG_PAINTS"))
michael@0	91	gdk_window_set_debug_updates(TRUE);
michael@0	92
michael@0	93	int err = pipe(mPipeFDs);
michael@0	94	if (err)
michael@0	95	return NS_ERROR_OUT_OF_MEMORY;
michael@0	96
michael@0	97	GIOChannel *ioc;
michael@0	98	GSource *source;
michael@0	99
michael@0	100	// make the pipe nonblocking
michael@0	101
michael@0	102	int flags = fcntl(mPipeFDs[0], F_GETFL, 0);
michael@0	103	if (flags == -1)
michael@0	104	goto failed;
michael@0	105	err = fcntl(mPipeFDs[0], F_SETFL, flags | O_NONBLOCK);
michael@0	106	if (err == -1)
michael@0	107	goto failed;
michael@0	108	flags = fcntl(mPipeFDs[1], F_GETFL, 0);
michael@0	109	if (flags == -1)
michael@0	110	goto failed;
michael@0	111	err = fcntl(mPipeFDs[1], F_SETFL, flags | O_NONBLOCK);
michael@0	112	if (err == -1)
michael@0	113	goto failed;
michael@0	114
michael@0	115	ioc = g_io_channel_unix_new(mPipeFDs[0]);
michael@0	116	source = g_io_create_watch(ioc, G_IO_IN);
michael@0	117	g_io_channel_unref(ioc);
michael@0	118	g_source_set_callback(source, (GSourceFunc)EventProcessorCallback, this, nullptr);
michael@0	119	g_source_set_can_recurse(source, TRUE);
michael@0	120	mTag = g_source_attach(source, nullptr);
michael@0	121	g_source_unref(source);
michael@0	122
michael@0	123	return nsBaseAppShell::Init();
michael@0	124	failed:
michael@0	125	close(mPipeFDs[0]);
michael@0	126	close(mPipeFDs[1]);
michael@0	127	mPipeFDs[0] = mPipeFDs[1] = 0;
michael@0	128	return NS_ERROR_FAILURE;
michael@0	129	}
michael@0	130
michael@0	131	void
michael@0	132	nsAppShell::ScheduleNativeEventCallback()
michael@0	133	{
michael@0	134	unsigned char buf[] = { NOTIFY_TOKEN };
michael@0	135	unused << write(mPipeFDs[1], buf, 1);
michael@0	136	}
michael@0	137
michael@0	138	bool
michael@0	139	nsAppShell::ProcessNextNativeEvent(bool mayWait)
michael@0	140	{
michael@0	141	return g_main_context_iteration(nullptr, mayWait);
michael@0	142	}