/*      @(#)cmd7.c      8.1 (Berkeley) 6/6/93   */
/*      $NetBSD: cmd7.c,v 1.8 2006/05/02 22:30:25 christos Exp $        */

/*
 * Copyright (c) 1983, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Edward Wang at The University of California, Berkeley.
 *
 * 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 of the University 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 REGENTS 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 REGENTS 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.
 */

#include <stdlib.h>
#include <unistd.h>
#include "defs.h"
#include "window_string.h"

void    unyank(void);
void    yank_highlight(int, int, int, int);
void    yank_highlight_line(int, int, int);
void    yank_line(int, int, int);

/*
 * Window size.
 */
void
c_size(struct ww *w)
{
        int col, row;

        if (!terse)
                wwputs("New window size (lower right corner): ", cmdwin);
        col = MIN(w->ww_w.r, wwncol) - 1;
        row = MIN(w->ww_w.b, wwnrow) - 1;
        wwadd(boxwin, framewin->ww_back);
        for (;;) {
                wwbox(boxwin, w->ww_w.t - 1, w->ww_w.l - 1,
                        row - w->ww_w.t + 3, col - w->ww_w.l + 3);
                wwsetcursor(row, col);
                while (wwpeekc() < 0)
                        wwiomux();
                switch (getpos(&row, &col, w->ww_w.t, w->ww_w.l,
                        wwnrow - 1, wwncol - 1)) {
                case 3:
                        wwunbox(boxwin);
                        wwdelete(boxwin);
                        return;
                case 2:
                        wwunbox(boxwin);
                        break;
                case 1:
                        wwunbox(boxwin);
                case 0:
                        continue;
                }
                break;
        }
        wwdelete(boxwin);
        if (!terse)
                wwputc('\n', cmdwin);
        wwcurtowin(cmdwin);
        sizewin(w, row - w->ww_w.t + 1, col - w->ww_w.l + 1);
}

/*
 * Yank and put
 */

struct yb {
        char *line;
        int length;
        struct yb *link;
};
struct yb *yb_head, *yb_tail;

void
c_yank(void)
{
        struct ww *w = selwin;
        int col1, row1;
        int col2, row2;
        int r, c;

        if (!terse)
                wwputs("Yank starting position: ", cmdwin);
        wwcursor(w, 0);
        row1 = w->ww_cur.r;
        col1 = w->ww_cur.c;
        for (;;) {
                wwsetcursor(row1, col1);
                while (wwpeekc() < 0)
                        wwiomux();
                switch (getpos(&row1, &col1, w->ww_i.t, w->ww_i.l,
                               w->ww_i.b - 1, w->ww_i.r - 1)) {
                case 3:
                        goto out;
                case 2:
                        break;
                case 1:
                case 0:
                        continue;
                }
                break;
        }
        if (!terse)
                wwputs("\nYank ending position: ", cmdwin);
        row2 = row1;
        col2 = col1;
        for (;;) {
                wwsetcursor(row2, col2);
                while (wwpeekc() < 0)
                        wwiomux();
                r = row2;
                c = col2;
                switch (getpos(&row2, &col2, w->ww_i.t, w->ww_i.l,
                               w->ww_i.b - 1, w->ww_i.r - 1)) {
                case 3:
                        yank_highlight(row1, col1, r, c);
                        goto out;
                case 2:
                        break;
                case 1:
                        yank_highlight(row1, col1, r, c);
                        yank_highlight(row1, col1, row2, col2);
                case 0:
                        continue;
                }
                break;
        }
        if (row2 < row1 || (row2 == row1 && col2 < col1)) {
                r = row1;
                c = col1;
                row1 = row2;
                col1 = col2;
                row2 = r;
                col2 = c;
        }
        unyank();
        c = col1;
        for (r = row1; r < row2; r++) {
                yank_line(r, c, w->ww_b.r);
                c = w->ww_b.l;
        }
        yank_line(r, c, col2);
        yank_highlight(row1, col1, row2, col2);
        if (!terse)
                wwputc('\n', cmdwin);
out:
        wwcursor(w, 1);
}

void
yank_highlight(int row1, int col1, int row2, int col2)
{
        struct ww *w = selwin;
        int r, c;

        if ((wwavailmodes & WWM_REV) == 0)
                return;
        if (row2 < row1 || (row2 == row1 && col2 < col1)) {
                r = row1;
                c = col1;
                row1 = row2;
                col1 = col2;
                row2 = r;
                col2 = c;
        }
        c = col1;
        for (r = row1; r < row2; r++) {
                yank_highlight_line(r, c, w->ww_b.r);
                c = w->ww_b.l;
        }
        yank_highlight_line(r, c, col2);
}

void
yank_highlight_line(int r, int c, int cend)
{
        struct ww *w = selwin;
        char *win;

        if (r < w->ww_i.t || r >= w->ww_i.b)
                return;
        if (c < w->ww_i.l)
                c = w->ww_i.l;
        if (cend >= w->ww_i.r)
                cend = w->ww_i.r;
        for (win = w->ww_win[r] + c; c < cend; c++, win++) {
                *win ^= WWM_REV;
                if (wwsmap[r][c] == w->ww_index) {
                        if (*win == 0)
                                w->ww_nvis[r]++;
                        else if (*win == WWM_REV)
                                w->ww_nvis[r]--;
                        wwns[r][c].c_m ^= WWM_REV;
                        wwtouched[r] |= WWU_TOUCHED;
                }
        }
}

void
unyank(void)
{
        struct yb *yp, *yq;

        for (yp = yb_head; yp; yp = yq) {
                yq = yp->link;
                str_free(yp->line);
                free((char *) yp);
        }
        yb_head = yb_tail = NULL;
}

void
yank_line(int r, int c, int cend)
{
        struct yb *yp;
        int nl = 0;
        int n;
        union ww_char *bp;
        char *cp;

        if (c == cend)
                return;
        if ((yp = (struct yb *) malloc(sizeof *yp)) == NULL)
                return;
        yp->link = NULL;
        nl = cend == selwin->ww_b.r;
        bp = selwin->ww_buf[r];
        for (cend--; cend >= c; cend--)
                if (bp[cend].c_c != ' ')
                        break;
        yp->length = n = cend - c + 1;
        if (nl)
                yp->length++;
        if ((yp->line = str_alloc(yp->length + 1)) == NULL) {
                free(yp);
                return;
        }
        for (bp += c, cp = yp->line; --n >= 0;)
                *cp++ = bp++->c_c;
        if (nl)
                *cp++ = '\n';
        *cp = 0;
        if (yb_head)
                yb_tail = yb_tail->link = yp;
        else
                yb_head = yb_tail = yp;
}

void
c_put(void)
{
        struct yb *yp;

        for (yp = yb_head; yp; yp = yp->link)
                (void) write(selwin->ww_pty, yp->line, yp->length);
}