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nuttx-apps/graphics/twm4nx/src/ctwm4nx.cxx

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/////////////////////////////////////////////////////////////////////////////
// apps/graphics/twm4nx/src/ctwm4nx.cxx
// Twm4Nx - "Tom's Window Manager" for the NuttX NX Server
//
// Copyright (C) 2019 Gregory Nutt. All rights reserved.
// Author: Gregory Nutt <gnutt@nuttx.org>
//
// Largely an original work but derives from TWM 1.0.10 in many ways:
//
// Copyright 1989,1998 The Open Group
// Copyright 1988 by Evans & Sutherland Computer Corporation,
//
// Please refer to apps/twm4nx/COPYING for detailed copyright information.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
//
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in
// the documentation and/or other materials provided with the
// distribution.
// 3. Neither the name NuttX nor the names of its contributors may be
// used to endorse or promote products derived from this software
// without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
// OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
// AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//
/////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////
// Included Files
/////////////////////////////////////////////////////////////////////////////
#include <nuttx/config.h>
#include <cstdlib>
#include <cstdbool>
#include <csignal>
#include <cstdio>
#include <cfcntl>
#include <cstring>
#include <cerrno>
#include <sys/boardctl.h>
#include <semaphore.h>
#include <debug.h>
#include <nuttx/semaphore.h>
#include <nuttx/nx/nx.h>
#include <nuttx/nx/nxglib.h>
#include "platform/cxxinitialize.h"
#include "graphics/twm4nx/twm4nx_config.hxx"
#include "graphics/twm4nx/ctwm4nx.hxx"
#include "graphics/twm4nx/cbackground.hxx"
#include "graphics/twm4nx/cwindow.hxx"
#include "graphics/twm4nx/cwindowfactory.hxx"
#include "graphics/twm4nx/cwindowevent.hxx"
#include "graphics/twm4nx/cinput.hxx"
#include "graphics/twm4nx/cicon.hxx"
#include "graphics/twm4nx/ciconwin.hxx"
#include "graphics/twm4nx/ciconmgr.hxx"
#include "graphics/twm4nx/cmenus.hxx"
#include "graphics/twm4nx/cresize.hxx"
#include "graphics/twm4nx/cfonts.hxx"
#include "graphics/twm4nx/twm4nx_widgetevents.hxx"
/////////////////////////////////////////////////////////////////////////////
// Pre-processor Definitions
/////////////////////////////////////////////////////////////////////////////
#define DEFAULT_NICE_FONT "variable"
#define DEFAULT_FAST_FONT "fixed"
/////////////////////////////////////////////////////////////////////////////
// Public Function Prototypes
/////////////////////////////////////////////////////////////////////////////
// Suppress name-mangling
#ifdef BUILD_MODULE
extern "C" int main(int argc, FAR char *argv[]);
#else
extern "C" int twm4nx_main(int argc, char *argv[]);
#endif
/////////////////////////////////////////////////////////////////////////////
// Public Data
/////////////////////////////////////////////////////////////////////////////
using namespace Twm4Nx;
const char Twm4Nx::GNoName[] = "Untitled"; // Name if no name is specified
/////////////////////////////////////////////////////////////////////////////
// CTwm4Nx Implementation
/////////////////////////////////////////////////////////////////////////////
/**
* CTwm4Nx Constructor
*
* @param display. Indicates which display will be used. Usually zero
* except in the case wehre there of multiple displays.
*/
CTwm4Nx::CTwm4Nx(int display)
{
m_display = display;
m_eventq = (mqd_t)-1;
m_background = (FAR CBackground *)0;
m_input = (FAR CInput *)0;
m_icon = (FAR CIcon *)0;
m_iconmgr = (FAR CIconMgr *)0;
m_factory = (FAR CWindowFactory *)0;
m_fonts = (FAR CFonts *)0;
m_resize = (FAR CResize *)0;
}
/**
* CTwm4Nx Destructor
*/
CTwm4Nx::~CTwm4Nx(void)
{
cleanup();
}
/**
* This is the main, controlling thread of the window manager. It is
* called only from the extern "C" main() entry point.
*
* NOTE: In the event of truly abnormal conditions, this function will
* not return. It will exit via the abort() method.
*
* @return True if the window manager was terminated properly. false is
* return on any failure.
*/
bool CTwm4Nx::run(void)
{
// Open a message queue to receive NxWidget-related events. We need to
// do this early so that the messasge queue name will be available to
// constructors
genMqName(); // Generate a random message queue name
m_eventq = mq_open(m_queueName, O_RDONLY | O_CREAT, 0666);
if (m_eventq == (mqd_t)-1)
{
gerr("ERROR: Failed open message queue '%s': %d\n",
m_queueName, errno);
cleanup();
return false;
}
#if defined(CONFIG_HAVE_CXX) && defined(CONFIG_HAVE_CXXINITIALIZE)
// Call all C++ static constructors
up_cxxinitialize();
#endif
#if defined(CONFIG_LIB_BOARDCTL) && !defined(CONFIG_BOARD_LATE_INITIALIZE)
// Should we perform board-specific initialization? There are two ways
// that board initialization can occur: 1) automatically via
// board_late_initialize() during bootup if CONFIG_BOARD_LATE_INITIALIZE, or
// 2) here via a call to boardctl() if the interface is enabled
// (CONFIG_LIB_BOARDCTL=y).
(void)boardctl(BOARDIOC_INIT, 0);
#endif
// Connect to the NX server
if (!connect())
{
gerr("ERROR: Failed to connect to the NX server\n");
cleanup();
return false;
}
// Get the background up as soon as possible
m_background = new CBackground(this);
if (m_background == (FAR CBackground *)0)
{
gerr("ERROR: Failed to create CBackground\n");
cleanup();
return false;
}
// Paint the background image
if (!m_background->setBackgroundImage(&CONFIG_TWM4NX_BACKGROUND_IMAGE))
{
gerr("ERROR: Failed to set backgournd image\n");
cleanup();
return false;
}
// Get the size of the display (which is equivalent to size of the
// background window).
m_background->getDisplaySize(m_displaySize);
DEBUGASSERT((unsigned int)m_displaySize.w <= INT16_MAX &&
(unsigned int)m_displaySize.h <= INT16_MAX);
m_maxWindow.w = INT16_MAX - m_displaySize.w;
m_maxWindow.h = INT16_MAX - m_displaySize.w;
// Create the keyboard/mouse input device thread
m_input = new CInput(this);
if (m_input == (CInput *)0)
{
gerr("ERROR: Failed to create CInput\n");
cleanup();
return false;
}
if (!m_input->start())
{
gerr("ERROR: Failed start the keyboard/mouse listener\n");
cleanup();
return false;
}
// Create the Icon Manager
m_iconmgr = new CIconMgr(this, 4);
if (m_iconmgr == (CIconMgr *)0)
{
cleanup();
return false;
}
if (!m_iconmgr->initialize("Twm4Nx"))
{
cleanup();
return false;
}
// Cache a CIcon instance for use across the session
m_icon = new CIcon(this);
if (m_iconmgr == (CIconMgr *)0)
{
cleanup();
return false;
}
// Cache a CFonts instance for use across the session
m_fonts = new CFonts(this);
if (m_fonts == (CFonts *)0)
{
cleanup();
return false;
}
// Create all fonts
if (!m_fonts->initialize())
{
cleanup();
return false;
}
// Cache a CWindowFactory instance for use across the session
m_factory = new CWindowFactory(this);
if (m_factory == (CWindowFactory *)0)
{
cleanup();
return false;
}
// Cache a CResize instance for use across the session
m_resize = new CResize(this);
if (m_resize == (CResize *)0)
{
cleanup();
return false;
}
if (!m_resize->initialize())
{
cleanup();
return false;
}
// Enter the event loop
for (; ; )
{
// Wait for the next NxWidget event
struct SEventMsg eventmsg;
int ret = mq_receive(m_eventq, (FAR char *)&eventmsg,
sizeof(struct SEventMsg), (FAR unsigned int *)0);
if (ret < 0)
{
gerr("ERROR: mq_receive failed: %d\n", errno);
cleanup();
return false;
}
// Dispatch the new event
if (!dispatchEvent(&eventmsg))
{
gerr("ERROR: dispatchEvent failed\n");
cleanup();
return false;
}
}
return true; // Not reachable
}
/**
* Connect to the NX server
*
* @return True if the message was properly handled. false is
* return on any failure.
*/
bool CTwm4Nx::connect(void)
{
// Connect to the server
bool nxConnected = CNxServer::connect();
if (nxConnected)
{
// Set the background color
if (!setBackgroundColor(CONFIG_TWM4NX_DEFAULT_BACKGROUNDCOLOR))
{
// Failed
}
}
return nxConnected;
}
/**
* Generate a random message queue name. Different message queue
* names are required for each instance of Twm4Nx that is started.
*/
void CTwm4Nx::genMqName(void)
{
unsigned long randvalue =
(unsigned long)std::random() & 0x00fffffful;
(void)std::asprintf(&m_queueName, "Twm4Nx%06ul", randvalue);
}
/**
* Handle SYSTEM events.
*
* @param eventmsg. The received NxWidget event message.
* @return True if the message was properly handled. false is
* return on any failure.
*/
bool CTwm4Nx::systemEvent(FAR struct SEventMsg *eventmsg)
{
switch (eventmsg->eventID)
{
case EVENT_SYSTEM_NOP: // Null event
break;
case EVENT_SYSTEM_ERROR: // Report system error
// REVISIT: An audible tone should be generated
break;
case EVENT_SYSTEM_EXIT: // Terminate the Twm4Nx session
abort();
break; // Does not return
default:
return false;
}
return true;
};
/**
* Dispatch NxWidget-related events.
*
* @param eventmsg. The received NxWidget event message.
* @return True if the message was properly dispatched. false is
* return on any failure.
*/
bool CTwm4Nx::dispatchEvent(FAR struct SEventMsg *eventmsg)
{
enum EEventRecipient recipient =
(enum EEventRecipient)(eventmsg->eventID & EVENT_RECIPIENT_MASK);
bool ret = false;
switch (recipient)
{
case EVENT_RECIPIENT_MSG: // NX message event
ret = CWindowEvent::event(eventmsg);
break;
case EVENT_RECIPIENT_SYSTEM: // Twm4Nx system event
ret = systemEvent(eventmsg);
break;
case EVENT_RECIPIENT_ICONWIN: // Icon window event
{
FAR CIconWin *iconWin = (FAR CIconWin *)eventmsg->obj;
DEBUGASSERT(iconWin != (FAR CIconWin *)0);
ret = iconWin->event(eventmsg);
}
break;
case EVENT_RECIPIENT_ICONMGR: // Icon Manager event
ret = m_iconmgr->event(eventmsg);
break;
case EVENT_RECIPIENT_MENU: // Menu related event
{
FAR CMenus *menus = (FAR CMenus *)eventmsg->obj;
DEBUGASSERT(menus != (FAR CMenus *)0);
ret = menus->event(eventmsg);
}
break;
case EVENT_RECIPIENT_WINDOW: // Window related event
case EVENT_RECIPIENT_TOOLBAR: // Toolbar related event
case EVENT_RECIPIENT_BORDER: // Window border related event
ret = m_factory->event(eventmsg);
break;
case EVENT_RECIPIENT_RESIZE: // Wind0w resize event
ret = m_resize->event(eventmsg);
break;
case EVENT_RECIPIENT_APP: // Application menu event
{
// Application events are unique in that they do not have any
// fixed, a priori endpoint. Rather, the endpoint must be
// provided in the 'handler' field of the message
DEBUGASSERT(eventmsg->handler != (FAR CTwm4NxEvent *)0);
ret = eventmsg->handler->event(eventmsg);
}
break;
case EVENT_RECIPIENT_MASK: // Used to isolate recipient
default:
break;
}
return ret;
}
/**
* Cleanup and exit Twm4Nx abnormally.
*/
void CTwm4Nx::abort()
{
cleanup();
std::exit(EXIT_FAILURE);
}
/**
* Cleanup in preparation for termination.
*/
void CTwm4Nx::cleanup()
{
// Close the NxWidget event message queue
if (m_eventq != (mqd_t)-1)
{
(void)mq_close(m_eventq);
m_eventq = (mqd_t)-1;
}
// Delete the background
if (m_background != (FAR CBackground *)0)
{
delete m_background;
m_background = (FAR CBackground *)0;
}
// Halt the keyboard/mouse listener and destroy the CInput class
if (m_input != (CInput *)0)
{
delete m_input;
m_input = (CInput *)0;
}
// Free the Icon Manager
if (m_iconmgr != (CIconMgr *)0)
{
delete m_iconmgr;
m_iconmgr = (CIconMgr *)0;
}
// Free the session CWindowFactory instance
if (m_factory != (CWindowFactory *)0)
{
delete m_factory;
m_factory = (CWindowFactory *)0;
}
// Free the session CResize instance
if (m_resize != (CResize *)0)
{
delete m_resize;
m_resize = (CResize *)0;
}
CNxServer::disconnect();
}
/////////////////////////////////////////////////////////////////////////////
// Public Functions
/////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////
// Name: main/twm4nx_main
//
// Description:
// Start of TWM
//
/////////////////////////////////////////////////////////////////////////////
#ifdef BUILD_MODULE
int main(int argc, FAR char *argv[])
#else
int twm4nx_main(int argc, char *argv[])
#endif
{
int display = 0;
for (int i = 1; i < argc; i++)
{
if (argv[i][0] == '-')
{
switch (argv[i][1])
{
case 'd': // -display <number>
if (std::strcmp(&argv[i][1], "display"))
{
goto usage;
}
if (++i >= argc)
{
goto usage;
}
display = atoi(argv[i]);
continue;
}
}
usage:
gerr("Usage: %s [-display <number>]\n", argv[0]);
return EXIT_FAILURE;
}
/* Create an instance of CTwm4Nx and and run it */
FAR CTwm4Nx *twm4nx = new CTwm4Nx(display);
if (twm4nx == (FAR CTwm4Nx *)0)
{
gerr("ERROR: Failed to instantiate CTwm4Nx\n");
return EXIT_FAILURE;
}
// Start the window manager
bool success = twm4nx->run();
if (!success)
{
gerr(" ERROR: Terminating due to failure\n");
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
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