Missing Pp, from Tiago Cunha.

[tmux-openbsd.git] / screen-redraw.c

/* $OpenBSD$ */

/*
 * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <sys/types.h>

#include <string.h>

#include "tmux.h"

int     screen_redraw_cell_border1(struct window_pane *, u_int, u_int);
int     screen_redraw_cell_border(struct client *, u_int, u_int);
int     screen_redraw_check_cell(struct client *, u_int, u_int);
void    screen_redraw_draw_number(struct client *, struct window_pane *);

#define CELL_INSIDE 0
#define CELL_LEFTRIGHT 1
#define CELL_TOPBOTTOM 2
#define CELL_TOPLEFT 3
#define CELL_TOPRIGHT 4
#define CELL_BOTTOMLEFT 5
#define CELL_BOTTOMRIGHT 6
#define CELL_TOPJOIN 7
#define CELL_BOTTOMJOIN 8
#define CELL_LEFTJOIN 9
#define CELL_RIGHTJOIN 10
#define CELL_JOIN 11
#define CELL_OUTSIDE 12

/* Check if cell is on the border of a particular pane. */
int
screen_redraw_cell_border1(struct window_pane *wp, u_int px, u_int py)
{
        /* Inside pane. */
        if (px >= wp->xoff && px < wp->xoff + wp->sx &&
            py >= wp->yoff && py < wp->yoff + wp->sy)
                return (0);

        /* Left/right borders. */
        if ((wp->yoff == 0 || py >= wp->yoff - 1) && py <= wp->yoff + wp->sy) {
                if (wp->xoff != 0 && px == wp->xoff - 1)
                        return (1);
                if (px == wp->xoff + wp->sx)
                        return (1);
        }

        /* Top/bottom borders. */
        if ((wp->xoff == 0 || px >= wp->xoff - 1) && px <= wp->xoff + wp->sx) {
                if (wp->yoff != 0 && py == wp->yoff - 1)
                        return (1);
                if (py == wp->yoff + wp->sy)
                        return (1);
        }

        /* Outside pane. */
        return (-1);
}

/* Check if a cell is on the pane border. */
int
screen_redraw_cell_border(struct client *c, u_int px, u_int py)
{
        struct window           *w = c->session->curw->window;
        struct window_pane      *wp;
        int                      retval;

        /* Check all the panes. */
        TAILQ_FOREACH(wp, &w->panes, entry) {
                if (!window_pane_visible(wp))
                        continue;
                if ((retval = screen_redraw_cell_border1(wp, px, py)) != -1)
                        return (retval);
        }

        return (0);
}

/* Check if cell inside a pane. */
int
screen_redraw_check_cell(struct client *c, u_int px, u_int py)
{
        struct window           *w = c->session->curw->window;
        struct window_pane      *wp;
        int                      borders;

        if (px > w->sx || py > w->sy)
                return (CELL_OUTSIDE);

        TAILQ_FOREACH(wp, &w->panes, entry) {
                if (!window_pane_visible(wp))
                        continue;

                /* If outside the pane and its border, skip it. */
                if ((wp->xoff != 0 && px < wp->xoff - 1) ||
                    px > wp->xoff + wp->sx ||
                    (wp->yoff != 0 && py < wp->yoff - 1) ||
                    py > wp->yoff + wp->sy)
                        continue;

                /* If definitely inside, return so. */
                if (!screen_redraw_cell_border(c, px, py))
                        return (CELL_INSIDE);

                /*
                 * Construct a bitmask of whether the cells to the left (bit
                 * 4), right, top, and bottom (bit 1) of this cell are borders.
                 */
                borders = 0;
                if (px == 0 || screen_redraw_cell_border(c, px - 1, py))
                        borders |= 8;
                if (px <= w->sx && screen_redraw_cell_border(c, px + 1, py))
                        borders |= 4;
                if (py == 0 || screen_redraw_cell_border(c, px, py - 1))
                        borders |= 2;
                if (py <= w->sy && screen_redraw_cell_border(c, px, py + 1))
                        borders |= 1;

                /*
                 * Figure out what kind of border this cell is. Only one bit
                 * set doesn't make sense (can't have a border cell with no
                 * others connected).
                 */
                switch (borders) {
                case 15:        /* 1111, left right top bottom */
                        return (CELL_JOIN);
                case 14:        /* 1110, left right top */
                        return (CELL_BOTTOMJOIN);
                case 13:        /* 1101, left right bottom */
                        return (CELL_TOPJOIN);
                case 12:        /* 1100, left right */
                        return (CELL_TOPBOTTOM);
                case 11:        /* 1011, left top bottom */
                        return (CELL_RIGHTJOIN);
                case 10:        /* 1010, left top */
                        return (CELL_BOTTOMRIGHT);
                case 9:         /* 1001, left bottom */
                        return (CELL_TOPRIGHT);
                case 7:         /* 0111, right top bottom */
                        return (CELL_LEFTJOIN);
                case 6:         /* 0110, right top */
                        return (CELL_BOTTOMLEFT);
                case 5:         /* 0101, right bottom */
                        return (CELL_TOPLEFT);
                case 3:         /* 0011, top bottom */
                        return (CELL_LEFTRIGHT);
                }
        }

        return (CELL_OUTSIDE);
}

/* Redraw entire screen. */
void
screen_redraw_screen(struct client *c, int status_only, int borders_only)
{
        struct window           *w = c->session->curw->window;
        struct tty              *tty = &c->tty;
        struct window_pane      *wp;
        struct grid_cell         active_gc, other_gc;
        u_int                    i, j, type;
        int                      status, fg, bg;
        const u_char            *base, *ptr;
        u_char                   ch, border[20];

        /* Get status line, er, status. */
        if (c->message_string != NULL || c->prompt_string != NULL)
                status = 1;
        else
                status = options_get_number(&c->session->options, "status");

        /* If only drawing status and it is present, don't need the rest. */
        if (status_only && status) {
                tty_draw_line(tty, &c->status, 0, 0, tty->sy - 1);
                tty_reset(tty);
                return;
        }

        /* Set up pane border attributes. */
        memcpy(&other_gc, &grid_default_cell, sizeof other_gc);
        memcpy(&active_gc, &grid_default_cell, sizeof active_gc);
        active_gc.data = other_gc.data = 'x'; /* not space */
        fg = options_get_number(&c->session->options, "pane-border-fg");
        colour_set_fg(&other_gc, fg);
        bg = options_get_number(&c->session->options, "pane-border-bg");
        colour_set_bg(&other_gc, bg);
        fg = options_get_number(&c->session->options, "pane-active-border-fg");
        colour_set_fg(&active_gc, fg);
        bg = options_get_number(&c->session->options, "pane-active-border-bg");
        colour_set_bg(&active_gc, bg);

        /* Draw background and borders. */
        strlcpy(border, " |-....--||+.", sizeof border);
        if (tty_term_has(tty->term, TTYC_ACSC)) {
                base = " xqlkmjwvtun~";
                for (ptr = base; *ptr != '\0'; ptr++) {
                        if ((ch = tty_get_acs(tty, *ptr)) != '\0')
                                border[ptr - base] = ch;
                }
                other_gc.attr |= GRID_ATTR_CHARSET;
                active_gc.attr |= GRID_ATTR_CHARSET;
        }
        for (j = 0; j < tty->sy - status; j++) {
                if (status_only && j != tty->sy - 1)
                        continue;
                for (i = 0; i < tty->sx; i++) {
                        type = screen_redraw_check_cell(c, i, j);
                        if (type == CELL_INSIDE)
                                continue;
                        if (screen_redraw_cell_border1(w->active, i, j) == 1)
                                tty_attributes(tty, &active_gc);
                        else
                                tty_attributes(tty, &other_gc);
                        tty_cursor(tty, i, j);
                        tty_putc(tty, border[type]);
                }
        }

        /* If only drawing borders, that's it. */
        if (borders_only)
                return;

        /* Draw the panes, if necessary. */
        TAILQ_FOREACH(wp, &w->panes, entry) {
                if (!window_pane_visible(wp))
                        continue;
                for (i = 0; i < wp->sy; i++) {
                        if (status_only && wp->yoff + i != tty->sy - 1)
                                continue;
                        tty_draw_line(tty, wp->screen, i, wp->xoff, wp->yoff);
                }
                if (c->flags & CLIENT_IDENTIFY)
                        screen_redraw_draw_number(c, wp);
        }

        /* Draw the status line. */
        if (status)
                tty_draw_line(tty, &c->status, 0, 0, tty->sy - 1);
        tty_reset(tty);
}

/* Draw a single pane. */
void
screen_redraw_pane(struct client *c, struct window_pane *wp)
{
        u_int   i;

        for (i = 0; i < wp->sy; i++)
                tty_draw_line(&c->tty, wp->screen, i, wp->xoff, wp->yoff);
        tty_reset(&c->tty);
}

/* Draw number on a pane. */
void
screen_redraw_draw_number(struct client *c, struct window_pane *wp)
{
        struct tty              *tty = &c->tty;
        struct session          *s = c->session;
        struct grid_cell         gc;
        u_int                    idx, px, py, i, j, xoff, yoff;
        int                      colour;
        char                     buf[16], *ptr;
        size_t                   len;

        idx = window_pane_index(wp->window, wp);
        len = xsnprintf(buf, sizeof buf, "%u", idx);

        if (wp->sx < len)
                return;
        colour = options_get_number(&s->options, "display-panes-colour");

        px = wp->sx / 2; py = wp->sy / 2;
        xoff = wp->xoff; yoff = wp->yoff;

        if (wp->sx < len * 6 || wp->sy < 5) {
                tty_cursor(tty, xoff + px - len / 2, yoff + py);
                memcpy(&gc, &grid_default_cell, sizeof gc);
                gc.data = '_'; /* not space */
                colour_set_fg(&gc, colour);
                tty_attributes(tty, &gc);
                tty_puts(tty, buf);
                return;
        }

        px -= len * 3;
        py -= 2;

        memcpy(&gc, &grid_default_cell, sizeof gc);
        gc.data = '_'; /* not space */
        colour_set_bg(&gc, colour);
        tty_attributes(tty, &gc);
        for (ptr = buf; *ptr != '\0'; ptr++) {
                if (*ptr < '0' || *ptr > '9')
                        continue;
                idx = *ptr - '0';

                for (j = 0; j < 5; j++) {
                        for (i = px; i < px + 5; i++) {
                                tty_cursor(tty, xoff + i, yoff + py + j);
                                if (clock_table[idx][j][i - px])
                                        tty_putc(tty, ' ');
                        }
                }
                px += 6;
        }
}