ui/curses.c - third_party/qemu - Git at Google

 /*
  * QEMU curses/ncurses display driver
  *
  * Copyright (c) 2005 Andrzej Zaborowski  <balrog@zabor.org>
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
  * in the Software without restriction, including without limitation the rights
  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  * copies of the Software, and to permit persons to whom the Software is
  * furnished to do so, subject to the following conditions:
  *
  * The above copyright notice and this permission notice shall be included in
  * all copies or substantial portions of the Software.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  * THE SOFTWARE.
  */
 #include <curses.h>

 #ifndef _WIN32
 #include <sys/ioctl.h>
 #include <termios.h>
 #endif

 #ifdef __OpenBSD__
 #define resize_term resizeterm
 #endif

 #include "qemu-common.h"
 #include "console.h"
 #include "sysemu.h"

 #define FONT_HEIGHT 16
 #define FONT_WIDTH 8

 static console_ch_t screen[160 * 100];
 static WINDOW *screenpad = NULL;
 static int width, height, gwidth, gheight, invalidate;
 static int px, py, sminx, sminy, smaxx, smaxy;

 static void curses_update(DisplayState *ds, int x, int y, int w, int h)
 {
     chtype *line;

     line = ((chtype *) screen) + y * width;
     for (h += y; y < h; y ++, line += width)
         mvwaddchnstr(screenpad, y, 0, line, width);

     pnoutrefresh(screenpad, py, px, sminy, sminx, smaxy - 1, smaxx - 1);
     refresh();
 }

 static void curses_calc_pad(void)
 {
     if (is_fixedsize_console()) {
         width = gwidth;
         height = gheight;
     } else {
         width = COLS;
         height = LINES;
     }

     if (screenpad)
         delwin(screenpad);

     clear();
     refresh();

     screenpad = newpad(height, width);

     if (width > COLS) {
         px = (width - COLS) / 2;
         sminx = 0;
         smaxx = COLS;
     } else {
         px = 0;
         sminx = (COLS - width) / 2;
         smaxx = sminx + width;
     }

     if (height > LINES) {
         py = (height - LINES) / 2;
         sminy = 0;
         smaxy = LINES;
     } else {
         py = 0;
         sminy = (LINES - height) / 2;
         smaxy = sminy + height;
     }
 }

 static void curses_resize(DisplayState *ds)
 {
     if (ds_get_width(ds) == gwidth && ds_get_height(ds) == gheight)
         return;

     gwidth = ds_get_width(ds);
     gheight = ds_get_height(ds);

     curses_calc_pad();
     ds->surface->width = width * FONT_WIDTH;
     ds->surface->height = height * FONT_HEIGHT;
 }

 #ifndef _WIN32
 #if defined(SIGWINCH) && defined(KEY_RESIZE)
 static void curses_winch_handler(int signum)
 {
     struct winsize {
         unsigned short ws_row;
         unsigned short ws_col;
         unsigned short ws_xpixel;   /* unused */
         unsigned short ws_ypixel;   /* unused */
     } ws;

     /* terminal size changed */
     if (ioctl(1, TIOCGWINSZ, &ws) == -1)
         return;

     resize_term(ws.ws_row, ws.ws_col);
     curses_calc_pad();
     invalidate = 1;

     /* some systems require this */
     signal(SIGWINCH, curses_winch_handler);
 }
 #endif
 #endif

 static void curses_cursor_position(DisplayState *ds, int x, int y)
 {
     if (x >= 0) {
         x = sminx + x - px;
         y = sminy + y - py;

         if (x >= 0 && y >= 0 && x < COLS && y < LINES) {
             move(y, x);
             curs_set(1);
             /* it seems that curs_set(1) must always be called before
              * curs_set(2) for the latter to have effect */
             if (!is_graphic_console())
                 curs_set(2);
             return;
         }
     }

     curs_set(0);
 }

 /* generic keyboard conversion */

 #include "curses_keys.h"

 static kbd_layout_t *kbd_layout = NULL;

 static void curses_refresh(DisplayState *ds)
 {
     int chr, nextchr, keysym, keycode, keycode_alt;

     if (invalidate) {
         clear();
         refresh();
         curses_calc_pad();
         ds->surface->width = FONT_WIDTH * width;
         ds->surface->height = FONT_HEIGHT * height;
         vga_hw_invalidate();
         invalidate = 0;
     }

     vga_hw_text_update(screen);

     nextchr = ERR;
     while (1) {
         /* while there are any pending key strokes to process */
         if (nextchr == ERR)
             chr = getch();
         else {
             chr = nextchr;
             nextchr = ERR;
         }

         if (chr == ERR)
             break;

 #ifdef KEY_RESIZE
         /* this shouldn't occur when we use a custom SIGWINCH handler */
         if (chr == KEY_RESIZE) {
             clear();
             refresh();
             curses_calc_pad();
             curses_update(ds, 0, 0, width, height);
             ds->surface->width = FONT_WIDTH * width;
             ds->surface->height = FONT_HEIGHT * height;
             continue;
         }
 #endif

         keycode = curses2keycode[chr];
         keycode_alt = 0;

         /* alt key */
         if (keycode == 1) {
             nextchr = getch();

             if (nextchr != ERR) {
                 chr = nextchr;
                 keycode_alt = ALT;
                 keycode = curses2keycode[nextchr];
                 nextchr = ERR;

                 if (keycode != -1) {
                     keycode |= ALT;

                     /* process keys reserved for qemu */
                     if (keycode >= QEMU_KEY_CONSOLE0 &&
                             keycode < QEMU_KEY_CONSOLE0 + 9) {
                         erase();
                         wnoutrefresh(stdscr);
                         console_select(keycode - QEMU_KEY_CONSOLE0);

                         invalidate = 1;
                         continue;
                     }
                 }
             }
         }

         if (kbd_layout) {
             keysym = -1;
             if (chr < CURSES_KEYS)
                 keysym = curses2keysym[chr];

             if (keysym == -1) {
                 if (chr < ' ') {
                     keysym = chr + '@';
                     if (keysym >= 'A' && keysym <= 'Z')
                         keysym += 'a' - 'A';
                     keysym |= KEYSYM_CNTRL;
                 } else
                     keysym = chr;
             }

             keycode = keysym2scancode(kbd_layout, keysym & KEYSYM_MASK);
             if (keycode == 0)
                 continue;

             keycode |= (keysym & ~KEYSYM_MASK) >> 16;
             keycode |= keycode_alt;
         }

         if (keycode == -1)
             continue;

         if (is_graphic_console()) {
             /* since terminals don't know about key press and release
              * events, we need to emit both for each key received */
             if (keycode & SHIFT)
                 kbd_put_keycode(SHIFT_CODE);
             if (keycode & CNTRL)
                 kbd_put_keycode(CNTRL_CODE);
             if (keycode & ALT)
                 kbd_put_keycode(ALT_CODE);
             if (keycode & ALTGR) {
                 kbd_put_keycode(SCANCODE_EMUL0);
                 kbd_put_keycode(ALT_CODE);
             }
             if (keycode & GREY)
                 kbd_put_keycode(GREY_CODE);
             kbd_put_keycode(keycode & KEY_MASK);
             if (keycode & GREY)
                 kbd_put_keycode(GREY_CODE);
             kbd_put_keycode((keycode & KEY_MASK) | KEY_RELEASE);
             if (keycode & ALTGR) {
                 kbd_put_keycode(SCANCODE_EMUL0);
                 kbd_put_keycode(ALT_CODE | KEY_RELEASE);
             }
             if (keycode & ALT)
                 kbd_put_keycode(ALT_CODE | KEY_RELEASE);
             if (keycode & CNTRL)
                 kbd_put_keycode(CNTRL_CODE | KEY_RELEASE);
             if (keycode & SHIFT)
                 kbd_put_keycode(SHIFT_CODE | KEY_RELEASE);
         } else {
             keysym = curses2qemu[chr];
             if (keysym == -1)
                 keysym = chr;

             kbd_put_keysym(keysym);
         }
     }
 }

 static void curses_atexit(void)
 {
     endwin();
 }

 static void curses_setup(void)
 {
     int i, colour_default[8] = {
         COLOR_BLACK, COLOR_BLUE, COLOR_GREEN, COLOR_CYAN,
         COLOR_RED, COLOR_MAGENTA, COLOR_YELLOW, COLOR_WHITE,
     };

     /* input as raw as possible, let everything be interpreted
      * by the guest system */
     initscr(); noecho(); intrflush(stdscr, FALSE);
     nodelay(stdscr, TRUE); nonl(); keypad(stdscr, TRUE);
     start_color(); raw(); scrollok(stdscr, FALSE);

     for (i = 0; i < 64; i ++)
         init_pair(i, colour_default[i & 7], colour_default[i >> 3]);
 }

 static void curses_keyboard_setup(void)
 {
 #if defined(__APPLE__)
     /* always use generic keymaps */
     if (!keyboard_layout)
         keyboard_layout = "en-us";
 #endif
     if(keyboard_layout) {
         kbd_layout = init_keyboard_layout(name2keysym, keyboard_layout);
         if (!kbd_layout)
             exit(1);
     }
 }

 void curses_display_init(DisplayState *ds, int full_screen)
 {
     DisplayChangeListener *dcl;
 #ifndef _WIN32
     if (!isatty(1)) {
         fprintf(stderr, "We need a terminal output\n");
         exit(1);
     }
 #endif

     curses_setup();
     curses_keyboard_setup();
     atexit(curses_atexit);

 #ifndef _WIN32
 #if defined(SIGWINCH) && defined(KEY_RESIZE)
     /* some curses implementations provide a handler, but we
      * want to be sure this is handled regardless of the library */
     signal(SIGWINCH, curses_winch_handler);
 #endif
 #endif

     dcl = (DisplayChangeListener *) g_malloc0(sizeof(DisplayChangeListener));
     dcl->dpy_update = curses_update;
     dcl->dpy_resize = curses_resize;
     dcl->dpy_refresh = curses_refresh;
     dcl->dpy_text_cursor = curses_cursor_position;
     register_displaychangelistener(ds, dcl);
     qemu_free_displaysurface(ds);
     ds->surface = qemu_create_displaysurface_from(640, 400, 0, 0, (uint8_t*) screen);

     invalidate = 1;
 }
	/*
	* QEMU curses/ncurses display driver
	*
	* Copyright (c) 2005 Andrzej Zaborowski <balrog@zabor.org>
	*
	* Permission is hereby granted, free of charge, to any person obtaining a copy
	* of this software and associated documentation files (the "Software"), to deal
	* in the Software without restriction, including without limitation the rights
	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	* copies of the Software, and to permit persons to whom the Software is
	* furnished to do so, subject to the following conditions:
	*
	* The above copyright notice and this permission notice shall be included in
	* all copies or substantial portions of the Software.
	*
	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
	* THE SOFTWARE.
	*/
	#include <curses.h>

	#ifndef _WIN32
	#include <sys/ioctl.h>
	#include <termios.h>
	#endif

	#ifdef __OpenBSD__
	#define resize_term resizeterm
	#endif

	#include "qemu-common.h"
	#include "console.h"
	#include "sysemu.h"

	#define FONT_HEIGHT 16
	#define FONT_WIDTH 8

	static console_ch_t screen[160 * 100];
	static WINDOW *screenpad = NULL;
	static int width, height, gwidth, gheight, invalidate;
	static int px, py, sminx, sminy, smaxx, smaxy;

	static void curses_update(DisplayState *ds, int x, int y, int w, int h)
	{
	chtype *line;

	line = ((chtype ) screen) + y width;
	for (h += y; y < h; y ++, line += width)
	mvwaddchnstr(screenpad, y, 0, line, width);

	pnoutrefresh(screenpad, py, px, sminy, sminx, smaxy - 1, smaxx - 1);
	refresh();
	}

	static void curses_calc_pad(void)
	{
	if (is_fixedsize_console()) {
	width = gwidth;
	height = gheight;
	} else {
	width = COLS;
	height = LINES;
	}

	if (screenpad)
	delwin(screenpad);

	clear();
	refresh();

	screenpad = newpad(height, width);

	if (width > COLS) {
	px = (width - COLS) / 2;
	sminx = 0;
	smaxx = COLS;
	} else {
	px = 0;
	sminx = (COLS - width) / 2;
	smaxx = sminx + width;
	}

	if (height > LINES) {
	py = (height - LINES) / 2;
	sminy = 0;
	smaxy = LINES;
	} else {
	py = 0;
	sminy = (LINES - height) / 2;
	smaxy = sminy + height;
	}
	}

	static void curses_resize(DisplayState *ds)
	{
	if (ds_get_width(ds) == gwidth && ds_get_height(ds) == gheight)
	return;

	gwidth = ds_get_width(ds);
	gheight = ds_get_height(ds);

	curses_calc_pad();
	ds->surface->width = width * FONT_WIDTH;
	ds->surface->height = height * FONT_HEIGHT;
	}

	#ifndef _WIN32
	#if defined(SIGWINCH) && defined(KEY_RESIZE)
	static void curses_winch_handler(int signum)
	{
	struct winsize {
	unsigned short ws_row;
	unsigned short ws_col;
	unsigned short ws_xpixel; /* unused */
	unsigned short ws_ypixel; /* unused */
	} ws;

	/* terminal size changed */
	if (ioctl(1, TIOCGWINSZ, &ws) == -1)
	return;

	resize_term(ws.ws_row, ws.ws_col);
	curses_calc_pad();
	invalidate = 1;

	/* some systems require this */
	signal(SIGWINCH, curses_winch_handler);
	}
	#endif
	#endif

	static void curses_cursor_position(DisplayState *ds, int x, int y)
	{
	if (x >= 0) {
	x = sminx + x - px;
	y = sminy + y - py;

	if (x >= 0 && y >= 0 && x < COLS && y < LINES) {
	move(y, x);
	curs_set(1);
	/* it seems that curs_set(1) must always be called before
	* curs_set(2) for the latter to have effect */
	if (!is_graphic_console())
	curs_set(2);
	return;
	}
	}

	curs_set(0);
	}

	/* generic keyboard conversion */

	#include "curses_keys.h"

	static kbd_layout_t *kbd_layout = NULL;

	static void curses_refresh(DisplayState *ds)
	{
	int chr, nextchr, keysym, keycode, keycode_alt;

	if (invalidate) {
	clear();
	refresh();
	curses_calc_pad();
	ds->surface->width = FONT_WIDTH * width;
	ds->surface->height = FONT_HEIGHT * height;
	vga_hw_invalidate();
	invalidate = 0;
	}

	vga_hw_text_update(screen);

	nextchr = ERR;
	while (1) {
	/* while there are any pending key strokes to process */
	if (nextchr == ERR)
	chr = getch();
	else {
	chr = nextchr;
	nextchr = ERR;
	}

	if (chr == ERR)
	break;

	#ifdef KEY_RESIZE
	/* this shouldn't occur when we use a custom SIGWINCH handler */
	if (chr == KEY_RESIZE) {
	clear();
	refresh();
	curses_calc_pad();
	curses_update(ds, 0, 0, width, height);
	ds->surface->width = FONT_WIDTH * width;
	ds->surface->height = FONT_HEIGHT * height;
	continue;
	}
	#endif

	keycode = curses2keycode[chr];
	keycode_alt = 0;

	/* alt key */
	if (keycode == 1) {
	nextchr = getch();

	if (nextchr != ERR) {
	chr = nextchr;
	keycode_alt = ALT;
	keycode = curses2keycode[nextchr];
	nextchr = ERR;

	if (keycode != -1) {
	keycode \|= ALT;

	/* process keys reserved for qemu */
	if (keycode >= QEMU_KEY_CONSOLE0 &&
	keycode < QEMU_KEY_CONSOLE0 + 9) {
	erase();
	wnoutrefresh(stdscr);
	console_select(keycode - QEMU_KEY_CONSOLE0);

	invalidate = 1;
	continue;
	}
	}
	}
	}

	if (kbd_layout) {
	keysym = -1;
	if (chr < CURSES_KEYS)
	keysym = curses2keysym[chr];

	if (keysym == -1) {
	if (chr < ' ') {
	keysym = chr + '@';
	if (keysym >= 'A' && keysym <= 'Z')
	keysym += 'a' - 'A';
	keysym \|= KEYSYM_CNTRL;
	} else
	keysym = chr;
	}

	keycode = keysym2scancode(kbd_layout, keysym & KEYSYM_MASK);
	if (keycode == 0)
	continue;

	keycode \|= (keysym & ~KEYSYM_MASK) >> 16;
	keycode \|= keycode_alt;
	}

	if (keycode == -1)
	continue;

	if (is_graphic_console()) {
	/* since terminals don't know about key press and release
	* events, we need to emit both for each key received */
	if (keycode & SHIFT)
	kbd_put_keycode(SHIFT_CODE);
	if (keycode & CNTRL)
	kbd_put_keycode(CNTRL_CODE);
	if (keycode & ALT)
	kbd_put_keycode(ALT_CODE);
	if (keycode & ALTGR) {
	kbd_put_keycode(SCANCODE_EMUL0);
	kbd_put_keycode(ALT_CODE);
	}
	if (keycode & GREY)
	kbd_put_keycode(GREY_CODE);
	kbd_put_keycode(keycode & KEY_MASK);
	if (keycode & GREY)
	kbd_put_keycode(GREY_CODE);
	kbd_put_keycode((keycode & KEY_MASK) \| KEY_RELEASE);
	if (keycode & ALTGR) {
	kbd_put_keycode(SCANCODE_EMUL0);
	kbd_put_keycode(ALT_CODE \| KEY_RELEASE);
	}
	if (keycode & ALT)
	kbd_put_keycode(ALT_CODE \| KEY_RELEASE);
	if (keycode & CNTRL)
	kbd_put_keycode(CNTRL_CODE \| KEY_RELEASE);
	if (keycode & SHIFT)
	kbd_put_keycode(SHIFT_CODE \| KEY_RELEASE);
	} else {
	keysym = curses2qemu[chr];
	if (keysym == -1)
	keysym = chr;

	kbd_put_keysym(keysym);
	}
	}
	}

	static void curses_atexit(void)
	{
	endwin();
	}

	static void curses_setup(void)
	{
	int i, colour_default[8] = {
	COLOR_BLACK, COLOR_BLUE, COLOR_GREEN, COLOR_CYAN,
	COLOR_RED, COLOR_MAGENTA, COLOR_YELLOW, COLOR_WHITE,
	};

	/* input as raw as possible, let everything be interpreted
	* by the guest system */
	initscr(); noecho(); intrflush(stdscr, FALSE);
	nodelay(stdscr, TRUE); nonl(); keypad(stdscr, TRUE);
	start_color(); raw(); scrollok(stdscr, FALSE);

	for (i = 0; i < 64; i ++)
	init_pair(i, colour_default[i & 7], colour_default[i >> 3]);
	}

	static void curses_keyboard_setup(void)
	{
	#if defined(__APPLE__)
	/* always use generic keymaps */
	if (!keyboard_layout)
	keyboard_layout = "en-us";
	#endif
	if(keyboard_layout) {
	kbd_layout = init_keyboard_layout(name2keysym, keyboard_layout);
	if (!kbd_layout)
	exit(1);
	}
	}

	void curses_display_init(DisplayState *ds, int full_screen)
	{
	DisplayChangeListener *dcl;
	#ifndef _WIN32
	if (!isatty(1)) {
	fprintf(stderr, "We need a terminal output\n");
	exit(1);
	}
	#endif

	curses_setup();
	curses_keyboard_setup();
	atexit(curses_atexit);

	#ifndef _WIN32
	#if defined(SIGWINCH) && defined(KEY_RESIZE)
	/* some curses implementations provide a handler, but we
	* want to be sure this is handled regardless of the library */
	signal(SIGWINCH, curses_winch_handler);
	#endif
	#endif

	dcl = (DisplayChangeListener *) g_malloc0(sizeof(DisplayChangeListener));
	dcl->dpy_update = curses_update;
	dcl->dpy_resize = curses_resize;
	dcl->dpy_refresh = curses_refresh;
	dcl->dpy_text_cursor = curses_cursor_position;
	register_displaychangelistener(ds, dcl);
	qemu_free_displaysurface(ds);
	ds->surface = qemu_create_displaysurface_from(640, 400, 0, 0, (uint8_t*) screen);

	invalidate = 1;
	}