curses.c

aumix-2.8 源碼下載

/* $Aumix: aumix/src/curses.c,v 1.6 2002/10/23 15:07:40 trevor Exp $ */
/* curses.c:  functions specific to ncurses mode
 * copyright (c) 1993, 1996-2000, 2002 the authors--see AUTHORS file
 *
 *
 * This file is part of aumix.
 *
 * Aumix is free software; you can redistribute it and/or modify it under the
 * terms of the GNU General Public License as published by the Free Software
 * Foundation; either version 2 of the License, or (at your option) any later
 * version.
 *
 * Aumix is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 * A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * aumix; if not, write to the Free Software Foundation, Inc., 59 Temple Place,
 * Suite 330, Boston, MA 02111-1307, USA.
 */

#include "common.h"
#ifdef HAVE_CURSES
#include <ctype.h>		/* tolower() */
#include "curses.h"
#include "interactive.h"
#include "mouse.h"

char           *chark, *charl, *charm, *charo, *charq, *chars, *charu, *lang;
int             current_dev, level_increment, balance_increment, menu_width, level_width, label_width, balance_width, levelbalmode, cols_saved, lines_saved;
int             in_keysbox = FALSE;

void            InitScreenCurses(void)
{
	int             ii, trackwidth, y = 0;
	static char    *menuitems[] = {
		LOCAL_TEXT_NOOP("Quit"),
		LOCAL_TEXT_NOOP("Load"),
		LOCAL_TEXT_NOOP("Save"),
		LOCAL_TEXT_NOOP("Keys"),
		LOCAL_TEXT_NOOP("Mute"),
		LOCAL_TEXT_NOOP("Only"),
		LOCAL_TEXT_NOOP("Undo")
	};
/* from ALL_LINGUAS in top-level configure.in */
/* This might be nicer with something like:

	typedef struct menulanguage {
		char    *language;
		int      width;
	}               menulanguage;
*/
	char            hotkey[2] = "";
	menu_width = MENUSIZES[1];	/* "en" default */
	for (ii = 0; ii < sizeof(LANGUAGES) / sizeof(*LANGUAGES); ii++) {
		if ((lang = (char *) getenv("LANG")) && !strncmp(lang, LANGUAGES[ii], 5)) {
			menu_width = MENUSIZES[ii];
			break;
		}
	}
	label_width = LABELSIZES[1];	/* "en" default */
	for (ii = 0; ii < sizeof(LANGUAGES) / sizeof(*LANGUAGES); ii++) {
		if ((lang = (char *) getenv("LANG")) && !strncmp(lang, LANGUAGES[ii], 5)) {
			label_width = LABELSIZES[ii];
			break;
		}
	}
	cols_saved = COLS;
	lines_saved = LINES;
	/*
	 * Adjust width of tracks according to number of columns available.
	 */
	/* fail-safe defaults */
	level_increment = 1;
	balance_increment = 1;
	level_width = 1;
	balance_width = 1;
	trackwidth = COLS - XOFFSET - menu_width - R_P_WIDTH - ARROW_WIDTH * 2 - label_width;
	trackwidth = trackwidth - 2;	/* Don't count zero positions in calculations. */
	if (trackwidth > 1) {
		balance_width = trackwidth / 2;
		if (balance_width > MAXLEVEL)
			balance_width = MAXLEVEL;
		balance_increment = MAXLEVEL / balance_width;
		if (MAXLEVEL > (balance_increment * balance_width))
			balance_increment++;
		balance_width = 1 + MAXLEVEL / balance_increment;
		level_width = trackwidth - balance_width;
		if (level_width > 0)
			level_increment = MAXLEVEL / level_width;
		if ((level_increment * level_width) < MAXLEVEL)
			level_increment++;
		level_width = 1 + MAXLEVEL / level_increment;
	}
	bkgdset(COLOR_PAIR(TRACK_COLOR));
	clear();
	for (ii = 0; ii < sizeof(menuitems) / sizeof(*menuitems); ii++) {
		attrset(COLOR_PAIR(MENU_COLOR));
		/*
		 * Leave two lines above menu, one for "aumix" and one for "muted" or "only".
		 */
		mvaddstr(ii + 2, 0, (char *) LOCAL_TEXT(menuitems[ii]));
		attrset(COLOR_PAIR(HOTKEY_COLOR) | A_BOLD);
		hotkey[1] = '\0';	/* Add the null since strncpy won't. */
		strncpy(hotkey, (char *) LOCAL_TEXT(menuitems[ii]), 1);
		mvaddstr(ii + 2, 0, hotkey);
	}
	attrset(COLOR_PAIR(MENU_COLOR) | A_UNDERLINE);
	mvaddstr(0, 0, "aumix");
	attrset(COLOR_PAIR(AXIS_COLOR));
	y = CountChannels(SOUND_MIXER_NRDEVICES);
	if (YOFFSET + y <= LINES) {
		mvaddstr(YOFFSET + y, XOFFSET + menu_width + R_P_WIDTH, (char *) LOCAL_TEXT("0"));
		mvaddstr(YOFFSET + y, XOFFSET + menu_width + R_P_WIDTH + (level_width - strlen(LOCAL_TEXT("Level"))) / 2, (char *) LOCAL_TEXT("Level"));
		mvaddstr(YOFFSET + y, XOFFSET + menu_width + R_P_WIDTH + level_width - 3, (char *) LOCAL_TEXT("100"));
		mvaddstr(YOFFSET + y, XOFFSET + menu_width + R_P_WIDTH + level_width + label_width + ARROW_WIDTH * 2, (char *) LOCAL_TEXT("L"));
		mvaddstr(YOFFSET + y, XOFFSET + menu_width + R_P_WIDTH + level_width + label_width + ARROW_WIDTH * 2 + (balance_width - strlen(LOCAL_TEXT("Balance"))) / 2, (char *) LOCAL_TEXT("Balance"));
		mvaddstr(YOFFSET + y, XOFFSET + menu_width + R_P_WIDTH + level_width + label_width + ARROW_WIDTH * 2 + balance_width - 1, (char *) LOCAL_TEXT("R"));
	}
	y = 0;			/* Now recycle it for a different use. */
	for (ii = 0; ii < SOUND_MIXER_NRDEVICES; ii++) {
		if ((1 << ii) & (devmask | recmask)) {
			attrset(COLOR_PAIR(AXIS_COLOR));
			/* draw control labels */
			mvaddstr(YOFFSET + y++, XOFFSET + menu_width + R_P_WIDTH + level_width + ARROW_WIDTH, LOCAL_TEXT(dev_label[ii]));
		}
	}
	PlaceCursor();
	RefreshAllSettings();
	HighlightLabelCurses();
}

void            PlaceCursor(void)
{
	/*
	 * The different attributes are to avoid ncurses optimizations. Let's hope ncurses doesn't optimize this away on terminals that can't underline.
	 */
	attrset(COLOR_PAIR(MENU_COLOR) | A_NORMAL);
	mvaddch(0, 4, 'x');
	refresh();
	attrset(COLOR_PAIR(MENU_COLOR) | A_UNDERLINE);
	mvaddch(0, 4, 'x');
	refresh();
}

void            HighlightLabelCurses(void)
{
	attrset(COLOR_PAIR(ACTIVE_COLOR) | ((has_colors()) ? A_BOLD : A_REVERSE));
	mvaddstr(YOFFSET + CountChannels(current_dev), XOFFSET + menu_width + R_P_WIDTH + level_width + ARROW_WIDTH, LOCAL_TEXT(dev_label[current_dev]));
	PlaceCursor();
}

void            KeysBoxCurses(void)
{
	/*
	 * "This interface is made obsolete by setitimer(2)."--alarm(3), FreeBSD
	 */
	alarm(0);		/* Disable updates. */
	timeout(-1);		/* Wait indefinitely for input. */
	in_keysbox = TRUE;
	clear();
	attrset(COLOR_PAIR(AXIS_COLOR));
	move(3, 0);
	addstr((char *) LOCAL_TEXT("page arrows\n"));
	addstr((char *) LOCAL_TEXT("tab enter < > , .\n"));
	addstr((char *) LOCAL_TEXT("+ - [ ] arrows digits\n"));
	addstr((char *) LOCAL_TEXT("space\n"));
	addstr((char *) LOCAL_TEXT("|\n"));
	printw((char *) LOCAL_TEXT("\nPress a key or mouse button to resume."));
	move(1, 0);
	printw((char *) LOCAL_TEXT("Key                       Function\n"));
	printw((char *) LOCAL_TEXT("------------------------- --------------------"));
	mvaddstr(3, 26, (char *) LOCAL_TEXT("change channel\n"));
	mvaddstr(4, 26, (char *) LOCAL_TEXT("toggle level/balance\n"));
	mvaddstr(5, 26, (char *) LOCAL_TEXT("adjust slider\n"));
	mvaddstr(6, 26, (char *) LOCAL_TEXT("toggle record/play\n"));
	mvaddstr(7, 26, (char *) LOCAL_TEXT("center balance\n"));
	refresh();

	Getch();
	alarm(REFRESH_PERIOD);	/* Enable updates again. */
	in_keysbox = FALSE;
	timeout(1000);
	clear();
	InitScreen();
	DrawLevelBalModeCurses(current_dev, levelbalmode);
	HighlightLabelCurses();
}

void            ShowMutingCurses(void)
{
	attrset(COLOR_PAIR(AXIS_COLOR));
	move(1, 0);		/* Move down one line, for the title "aumix". */
	switch (mutestate) {
	case MUTE_OFF:
		printw("%s", LOCAL_TEXT("     "));
		break;
	case MUTE_GLOBAL:
		printw("%s", LOCAL_TEXT("muted"));
		break;
	case MUTE_ONLY:
		printw("%s", LOCAL_TEXT("only "));
	}
	PlaceCursor();
}

void            SetDefaultColors(void)
{
	int             background = COLOR_BLACK;
	int             foreground = COLOR_WHITE;
#if defined HAVE_USEDEFAULT
	if (use_default_colors() == OK) {
		background = -1;
		foreground = -1;
	}
#endif				/* HAVE_USEDEFAULT */
	init_pair(MENU_COLOR, COLOR_CYAN, COLOR_BLUE);
	init_pair(HOTKEY_COLOR, COLOR_RED, COLOR_BLUE);
	init_pair(HANDLE_COLOR, foreground, background);
	init_pair(TRACK_COLOR, COLOR_BLUE, background);
	init_pair(RECORD_COLOR, COLOR_RED, background);
	init_pair(PLAY_COLOR, COLOR_GREEN, background);
	init_pair(ACTIVE_COLOR, COLOR_YELLOW, COLOR_RED);
	init_pair(AXIS_COLOR, foreground, background);
}

void            WakeUpCurses(void)
{
	if ((COLS != cols_saved) || (LINES != lines_saved)) {	/* Window was resized. */
		InitScreen();
		DrawLevelBalMode(current_dev, levelbalmode);
	}
	RefreshNewSettings();
}

void            InitCurses(void)
{
	char           *s;
	ReadInteractiveKeys();
	/*
	 * When running in an xterm, make sure DISPLAY is set, because ncurses won't process mouse activity properly if it isn't.
	 */
	if ((s = getenv("TERM")) && !strncmp(s, "xterm", 5))
		if ((s = getenv("DISPLAY")) == NULL)
			putenv("DISPLAY=");
	initscr();
	noecho();
	leaveok(stdscr, TRUE);
	keypad(stdscr, TRUE);
	meta(stdscr, TRUE);	/* not default on FreeBSD 4.0 before 1999-11-30 */
	cbreak();
	/*
	 * says curs_kernel(3):
	 * 
	 * The SVr4 man pages warn that the return value of curs_set "is currently incorrect".  This implementation gets it right, but it may be unwise to count on the correctness of the return value anywhere else.
	 */
	(void) curs_set(0);
	timeout(1000);
	start_color();
}

int             InitColors(char *scheme)
{
	FILE           *schemefile;
	char            filename[PATH_MAX], *item, *fore, *back;
	char            buf[BUFSIZ], *p;
	static char    *colors[] =
	{"black", "red", "green", "yellow", "blue", "magenta", "cyan", "white"};
	static char    *items[] =
	{"active", "axis", "handle", "hotkey", "menu", "play", "record", "track"};
	int             bg, fg, ii;
	if ((strlen(scheme) + strlen(DATADIR) + 1) >= PATH_MAX)
		ErrorExitWarn(EFILE, 'e');
	schemefile = fopen(filename, "r");
	if (schemefile == NULL) {
		sprintf(filename, "%s/%s", DATADIR, scheme);
		schemefile = fopen(filename, "r");
		if (schemefile == NULL)
			return EFILE;
	}
	while (fgets(buf, BUFSIZ, schemefile)) {
		p = buf;
		while (*p && isspace(*p))	/* skip whitespace */
			p++;
		if (*p == 0 || *p == '#')	/* skip empty lines and comments */
			continue;
		/*
		 * Says the Linux strtok(3) man page:
		 *