source: neercs/trunk/src/main.c @ 2421 Tweet

/*
 *  neercs        console-based window manager
 *  Copyright (c) 2006 Sam Hocevar <sam@zoy.org>
 *                2008 Jean-Yves Lamoureux <jylam@lnxscene.org>
 *                All Rights Reserved
 *
 *  $Id: main.c 2421 2008-06-15 15:13:41Z jylam $
 *
 *  This program is free software. It comes without any warranty, to
 *  the extent permitted by applicable law. You can redistribute it
 *  and/or modify it under the terms of the Do What The Fuck You Want
 *  To Public License, Version 2, as published by Sam Hocevar. See
 *  http://sam.zoy.org/wtfpl/COPYING for more details.
 */

#include "config.h"

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <signal.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/wait.h>

#if defined HAVE_PTY_H
#   include <pty.h>  /* for openpty and forkpty */
#else
#   include <util.h> /* for OS X */
#endif
#include <errno.h>
#include <cucul.h>
#include <caca.h>

#include "neercs.h"

int main(int argc, char **argv)
{
    static cucul_canvas_t *cv;
    static caca_display_t *dp;
    struct screen_list *screen_list = NULL;
    char *default_shell = NULL;
    int i, w, h, nt, args = 0;
    int eof = 0, refresh = 1, command = 0;


    nt = argc - 1;
    args = nt;

    if(nt == 0)
    {
        nt = 1;
    }

    default_shell = getenv("SHELL");

    if(default_shell == NULL  && !args)
    {
        fprintf(stderr, "Environment variable SHELL not set and no arguments given. kthxbye.\n");
        return -1;
    }

    /* Create main canvas and associated caca window */
    cv = cucul_create_canvas(0, 0);
    dp = caca_create_display(cv);
    if(!dp)
        return 1;
    caca_set_cursor(dp, 1);


    w = cucul_get_canvas_width(cv);
    h = cucul_get_canvas_height(cv);



    /* Create screen list */
    screen_list = (struct screen_list*)     malloc(sizeof(struct screen_list));
    if(!screen_list)
    {
        fprintf(stderr, "Can't allocate memory at %s:%d\n", __FUNCTION__, __LINE__);
        return -1;
    }
    screen_list->screen = (struct screen**) malloc(sizeof(sizeof(struct screen*)));
    if(!screen_list->screen)
    {
        fprintf(stderr, "Can't allocate memory at %s:%d\n", __FUNCTION__, __LINE__);
        return -1;
    }
    screen_list->count = 0;
    screen_list->width  = cucul_get_canvas_width(cv);
    screen_list->mini = 1;
    screen_list->help = 0;
    screen_list->status = 1;
    screen_list->height = cucul_get_canvas_height(cv) - ((screen_list->mini*6) + (screen_list->status));
    screen_list->wm_type = WM_VSPLIT;
    screen_list->in_bell = 0;
    screen_list->pty = screen_list->prevpty = 0;


    for(i = 0; i < nt; i++)
    {
        struct screen *tmp;
        if(args) tmp = create_screen(w, h, argv[i + 1]);
        else     tmp = create_screen(w, h, default_shell);

        if(tmp)
        {
            if(add_screen(screen_list, tmp) < 0)
            {
                fprintf(stderr, "Can't add %p to %p\n", tmp, screen_list);
            }
        }
        else
        {
            fprintf(stderr, "Can't create screen\n");
        }
    }

    /* Windows are in a temporary state, resize them to the right dimensions */
    update_windows_props(cv, screen_list);
    caca_refresh_display(dp);


    for(;;)
    {
        caca_event_t ev;
        int ret;

        refresh |= update_screens_contents(screen_list);

        /* No more screens, exit */
        if(!screen_list->count) break;

        /* Update each screen canvas  */
        refresh |= update_terms(screen_list);

        /* Get events, if any */
        ret = caca_get_event(dp, CACA_EVENT_ANY, &ev, 0);
        if(ret && (caca_get_event_type(&ev) & CACA_EVENT_KEY_PRESS))
        {
            unsigned int c = caca_get_event_key_ch(&ev);

            if(command)
            {
                command = 0;

                switch(c)
                {
                case 0x01: //CACA_KEY_CTRL_A:
                    screen_list->pty ^= screen_list->prevpty;
                    screen_list->prevpty ^= screen_list->pty;
                    screen_list->pty ^= screen_list->prevpty;
                    refresh = 1;
                    break;
                case 'm':
                case 0x0d: //CACA_KEY_CTRL_M:
                    screen_list->mini = !screen_list->mini;
                    refresh = 1;
                    break;
                case 'n':
                case ' ':
                case '\0':
                case 0x0e: //CACA_KEY_CTRL_N:
                    screen_list->prevpty = screen_list->pty;
                    screen_list->pty = (screen_list->pty + 1) % screen_list->count;
                    refresh = 1;
                    break;
                case 'p':
                case 0x10: //CACA_KEY_CTRL_P:
                    screen_list->prevpty = screen_list->pty;
                    screen_list->pty = (screen_list->pty + screen_list->count - 1) % screen_list->count;
                    refresh = 1;
                    break;
                case 'c':
                case 0x03: //CACA_KEY_CTRL_C:
                    screen_list->prevpty = screen_list->pty;
                    screen_list->pty =
                        add_screen(screen_list, create_screen(w, h, default_shell));
                    refresh = 1;
                    break;
                case 'w':
                case 0x17: //CACA_KEY_CTRL_W:
                    screen_list->wm_type = (screen_list->wm_type==(WM_MAX-1)?
                                            screen_list->wm_type=0:
                                            screen_list->wm_type+1);
                    refresh = 1;
                    break;
                case 0x0b: //CACA_KEY_CTRL_K:
                    remove_screen(screen_list, screen_list->pty, 1);
                    screen_list->pty = screen_list->prevpty;
                    screen_list->prevpty = 0;
                    refresh = 1;
                    break;
                case 'h':
                case 0x08: //CACA_KEY_CTRL_H:
                    screen_list->help = !screen_list->help;
                    refresh = 1;
                    break;
                }
            }
            else
            {
                switch(c)
                {
                case 0x01: //CACA_KEY_CTRL_A:
                    command = 1; break;
                case CACA_KEY_UP:
                    write(screen_list->screen[screen_list->pty]->fd, "\x1b[A", 3); break;
                case CACA_KEY_DOWN:
                    write(screen_list->screen[screen_list->pty]->fd, "\x1b[B", 3); break;
                case CACA_KEY_RIGHT:
                    write(screen_list->screen[screen_list->pty]->fd, "\x1b[C", 3); break;
                case CACA_KEY_LEFT:
                    write(screen_list->screen[screen_list->pty]->fd, "\x1b[D", 3); break;
                case CACA_KEY_ESCAPE:
                    if(screen_list->help) screen_list->help = 0;
                default:
                    write(screen_list->screen[screen_list->pty]->fd, &c, 1); break;
                }
            }
        }
        else if(ret && (caca_get_event_type(&ev) & CACA_EVENT_RESIZE))
        {
            update_windows_props(cv, screen_list);
            cucul_clear_canvas(cv);
            refresh = 1;
        }
        else if(ret && (caca_get_event_type(&ev) & CACA_EVENT_QUIT))
        {
            break;
        }

        /* Resfresh screen */
        if(refresh || screen_list->in_bell)
        {
            refresh = 0;
            refresh_screens(cv, dp, screen_list);
        }

        eof = 1;
        for(i = 0; i < screen_list->count; i++)
            if(screen_list->screen[i]->fd >= 0)
                eof = 0;
        if(eof)
            break;
    }

    /* Clean up */
    caca_free_display(dp);
    cucul_free_canvas(cv);
    for(i = 0; i < screen_list->count; i++)
    {
        destroy_screen(screen_list->screen[i]);
    }
    free(screen_list->screen);
    free(screen_list);


    return 0;
}