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+/* Copyright (c) 2008, 2009
+ * Juergen Weigert (jnweiger@immd4.informatik.uni-erlangen.de)
+ * Michael Schroeder (mlschroe@immd4.informatik.uni-erlangen.de)
+ * Micah Cowan (micah@cowan.name)
+ * Sadrul Habib Chowdhury (sadrul@users.sourceforge.net)
+ * Copyright (c) 1993-2002, 2003, 2005, 2006, 2007
+ * Juergen Weigert (jnweiger@immd4.informatik.uni-erlangen.de)
+ * Michael Schroeder (mlschroe@immd4.informatik.uni-erlangen.de)
+ * Copyright (c) 1987 Oliver Laumann
+ *
+ * This program 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 3, or (at your option)
+ * any later version.
+ *
+ * This program 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 this program (see the file COPYING); if not, see
+ * http://www.gnu.org/licenses/, or contact Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA
+ *
+ ****************************************************************
+ */
+
+#include <sys/types.h>
+
+#include "config.h"
+#include "screen.h"
+#include "mark.h"
+#include "extern.h"
+
+#define INPUTLINE (flayer->l_height - 1)
+
+extern struct layer *flayer;
+extern struct win *fore;
+
+#ifdef COPY_PASTE
+
+int search_ic;
+
+/********************************************************************
+ * VI style Search
+ */
+
+static int matchword __P((char *, int, int, int));
+static void searchend __P((char *, int, char *));
+static void backsearchend __P((char *, int, char *));
+
+void
+Search(dir)
+int dir;
+{
+ struct markdata *markdata;
+ if (dir == 0)
+ {
+ markdata = (struct markdata *)flayer->l_data;
+ if (markdata->isdir > 0)
+ searchend(0, 0, NULL);
+ else if (markdata->isdir < 0)
+ backsearchend(0, 0, NULL);
+ else
+ LMsg(0, "No previous pattern");
+ }
+ else
+ Input((dir > 0 ? "/" : "?"), sizeof(markdata->isstr)-1, INP_COOKED,
+ (dir > 0 ? searchend : backsearchend), NULL, 0);
+}
+
+static void
+searchend(buf, len, data)
+char *buf;
+int len;
+char *data; /* dummy */
+{
+ int x = 0, sx, ex, y;
+ struct markdata *markdata;
+ struct win *p;
+
+ markdata = (struct markdata *)flayer->l_data;
+ p = markdata->md_window;
+ markdata->isdir = 1;
+ if (len)
+ strcpy(markdata->isstr, buf);
+ sx = markdata->cx + 1;
+ ex = flayer->l_width - 1;
+ for (y = markdata->cy; y < p->w_histheight + flayer->l_height; y++, sx = 0)
+ {
+ if ((x = matchword(markdata->isstr, y, sx, ex)) >= 0)
+ break;
+ }
+ if (y >= p->w_histheight + flayer->l_height)
+ {
+ LGotoPos(flayer, markdata->cx, W2D(markdata->cy));
+ LMsg(0, "Pattern not found");
+ }
+ else
+ revto(x, y);
+}
+
+static void
+backsearchend(buf, len, data)
+char *buf;
+int len;
+char *data; /* dummy */
+{
+ int sx, ex, x = -1, y;
+ struct markdata *markdata;
+
+ markdata = (struct markdata *)flayer->l_data;
+ markdata->isdir = -1;
+ if (len)
+ strcpy(markdata->isstr, buf);
+ ex = markdata->cx - 1;
+ for (y = markdata->cy; y >= 0; y--, ex = flayer->l_width - 1)
+ {
+ sx = 0;
+ while ((sx = matchword(markdata->isstr, y, sx, ex)) >= 0)
+ x = sx++;
+ if (x >= 0)
+ break;
+ }
+ if (y < 0)
+ {
+ LGotoPos(flayer, markdata->cx, W2D(markdata->cy));
+ LMsg(0, "Pattern not found");
+ }
+ else
+ revto(x, y);
+}
+
+
+/*
+ * Search for a string that matches pattern. The first character of the
+ * match must be on line y, between columns sx and ex (inclusive), but
+ * the rest of the match can extend beyond column ex and even onto the
+ * following line. Returns the starting column of the first match found,
+ * or -1 if there's no match.
+ */
+static int
+matchword(pattern, y, sx, ex)
+char *pattern;
+int y, sx, ex;
+{
+ unsigned char *ip, *cp, *pp, *cpe;
+ int cy;
+
+ fore = ((struct markdata *)flayer->l_data)->md_window;
+
+ for (;sx <= ex; sx++)
+ {
+ cy = y;
+ cp = WIN(cy)->image + sx;
+ cpe = WIN(cy)->image + flayer->l_width;
+ pp = (unsigned char *)pattern;
+ for (;;)
+ {
+ if (*cp != *pp)
+ if (!search_ic || ((*cp ^ *pp) & 0xdf) || (*cp | 0x20) < 'a' || (*cp | 0x20) > 'z')
+ break;
+ cp++;
+ pp++;
+ if (*pp == 0)
+ return sx;
+ if (cp == cpe) {
+ /*
+ * We have a partial match, but we've hit
+ * the end of this line. Does it wrap onto
+ * the following line? If not, we're done.
+ */
+ if (*cp == ' ' || cy >= fore->w_histheight + flayer->l_height - 1)
+ break;
+
+ /*
+ * This line does wrap, so look on the next
+ * line for the rest of our match.
+ */
+ cy++;
+ cp = WIN(cy)->image;
+ cpe = WIN(cy)->image + flayer->l_width;
+ }
+ }
+ }
+ return -1;
+}
+
+
+/********************************************************************
+ * Emacs style ISearch
+ */
+
+static char *isprompts[] = {
+ "I-search backward: ", "failing I-search backward: ",
+ "I-search: ", "failing I-search: "
+};
+
+
+static int is_redo __P((struct markdata *));
+static void is_process __P((char *, int, char *));
+static int is_bm __P((char *, int, int, int, int));
+
+
+static int
+is_bm(str, l, p, end, dir)
+char *str;
+int l, p, end, dir;
+{
+ int tab[256];
+ int i, q;
+ unsigned char *s, c;
+ int w = flayer->l_width;
+
+ /* *sigh* to make WIN work */
+ fore = ((struct markdata *)flayer->l_next->l_data)->md_window;
+ debug2("is_bm: searching for %s len %d\n", str, l);
+ debug3("start at %d end %d dir %d\n", p, end, dir);
+ if (p < 0 || p + l > end)
+ return -1;
+ if (l == 0)
+ return p;
+ if (dir < 0)
+ str += l - 1;
+ for (i = 0; i < 256; i++)
+ tab[i] = l * dir;
+ for (i = 0; i < l - 1; i++, str += dir)
+ {
+ q = *(unsigned char *)str;
+ tab[q] = (l - 1 - i) * dir;
+ if (search_ic && (q | 0x20) >= 'a' && ((q | 0x20) <= 'z'))
+ tab[q ^ 0x20] = (l - 1 - i) * dir;
+ }
+ if (dir > 0)
+ p += l - 1;
+ debug1("first char to match: %c\n", *str);
+ while (p >= 0 && p < end)
+ {
+ q = p;
+ s = (unsigned char *)str;
+ for (i = 0;;)
+ {
+ c = (WIN(q / w))->image[q % w];
+ if (i == 0)
+ p += tab[(int)(unsigned char) c];
+ if (c != *s)
+ if (!search_ic || ((c ^ *s) & 0xdf) || (c | 0x20) < 'a' || (c | 0x20) > 'z')
+ break;
+ q -= dir;
+ s -= dir;
+ if (++i == l)
+ return q + (dir > 0 ? 1 : -l);
+ }
+ }
+ return -1;
+}
+
+
+/*ARGSUSED*/
+static void
+is_process(p, n, data) /* i-search */
+char *p;
+int n;
+char *data; /* dummy */
+{
+ int pos, x, y, dir;
+ struct markdata *markdata;
+
+ if (n == 0)
+ return;
+ ASSERT(p);
+ markdata = (struct markdata *)flayer->l_next->l_data;
+
+ pos = markdata->cx + markdata->cy * flayer->l_width;
+ LGotoPos(flayer, markdata->cx, W2D(markdata->cy));
+
+ switch (*p)
+ {
+ case '\007': /* CTRL-G */
+ pos = markdata->isstartpos;
+ /*FALLTHROUGH*/
+ case '\033': /* ESC */
+ *p = 0;
+ break;
+ case '\013': /* CTRL-K */
+ case '\027': /* CTRL-W */
+ markdata->isistrl = 1;
+ /*FALLTHROUGH*/
+ case '\b':
+ case '\177':
+ if (markdata->isistrl == 0)
+ return;
+ markdata->isistrl--;
+ pos = is_redo(markdata);
+ *p = '\b';
+ break;
+ case '\023': /* CTRL-S */
+ case '\022': /* CTRL-R */
+ if (markdata->isistrl >= (int)sizeof(markdata->isistr))
+ return;
+ dir = (*p == '\023') ? 1 : -1;
+ pos += dir;
+ if (markdata->isdir == dir && markdata->isistrl == 0)
+ {
+ strcpy(markdata->isistr, markdata->isstr);
+ markdata->isistrl = markdata->isstrl = strlen(markdata->isstr);
+ break;
+ }
+ markdata->isdir = dir;
+ markdata->isistr[markdata->isistrl++] = *p;
+ break;
+ default:
+ if (*p < ' ' || markdata->isistrl >= (int)sizeof(markdata->isistr)
+ || markdata->isstrl >= (int)sizeof(markdata->isstr) - 1)
+ return;
+ markdata->isstr[markdata->isstrl++] = *p;
+ markdata->isistr[markdata->isistrl++] = *p;
+ markdata->isstr[markdata->isstrl] = 0;
+ debug2("New char: %c - left %d\n", *p, (int)sizeof(markdata->isistr) - markdata->isistrl);
+ }
+ if (*p && *p != '\b')
+ pos = is_bm(markdata->isstr, markdata->isstrl, pos, flayer->l_width * (markdata->md_window->w_histheight + flayer->l_height), markdata->isdir);
+ if (pos >= 0)
+ {
+ x = pos % flayer->l_width;
+ y = pos / flayer->l_width;
+ LAY_CALL_UP
+ (
+ LayRedisplayLine(INPUTLINE, 0, flayer->l_width - 1, 0);
+ revto(x, y);
+ if (W2D(markdata->cy) == INPUTLINE)
+ revto_line(markdata->cx, markdata->cy, INPUTLINE > 0 ? INPUTLINE - 1 : 1);
+ );
+ }
+ if (*p)
+ inp_setprompt(isprompts[markdata->isdir + (pos < 0) + 1], markdata->isstrl ? markdata->isstr : "");
+ flayer->l_x = markdata->cx;
+ flayer->l_y = W2D(markdata->cy);
+ LGotoPos(flayer, flayer->l_x, flayer->l_y);
+ if (!*p)
+ {
+ /* we are about to finish, keep cursor position */
+ flayer->l_next->l_x = markdata->cx;
+ flayer->l_next->l_y = W2D(markdata->cy);
+ }
+}
+
+static int
+is_redo(markdata)
+struct markdata *markdata;
+{
+ int i, pos, npos, dir;
+ char c;
+
+ npos = pos = markdata->isstartpos;
+ dir = markdata->isstartdir;
+ markdata->isstrl = 0;
+ for (i = 0; i < markdata->isistrl; i++)
+ {
+ c = markdata->isistr[i];
+ if (c == '\022') /* ^R */
+ pos += (dir = -1);
+ else if (c == '\023') /* ^S */
+ pos += (dir = 1);
+ else
+ markdata->isstr[markdata->isstrl++] = c;
+ if (pos >= 0)
+ {
+ npos = is_bm(markdata->isstr, markdata->isstrl, pos, flayer->l_width * (markdata->md_window->w_histheight + flayer->l_height), dir);
+ if (npos >= 0)
+ pos = npos;
+ }
+ }
+ markdata->isstr[markdata->isstrl] = 0;
+ markdata->isdir = dir;
+ return npos;
+}
+
+void
+ISearch(dir)
+int dir;
+{
+ struct markdata *markdata;
+
+ markdata = (struct markdata *)flayer->l_data;
+ markdata->isdir = markdata->isstartdir = dir;
+ markdata->isstartpos = markdata->cx + markdata->cy * flayer->l_width;
+ markdata->isistrl = markdata->isstrl = 0;
+ if (W2D(markdata->cy) == INPUTLINE)
+ revto_line(markdata->cx, markdata->cy, INPUTLINE > 0 ? INPUTLINE - 1 : 1);
+ Input(isprompts[dir + 1], sizeof(markdata->isstr) - 1, INP_RAW,
+ is_process, NULL, 0);
+ LGotoPos(flayer, markdata->cx, W2D(markdata->cy));
+ flayer->l_x = markdata->cx;
+ flayer->l_y = W2D(markdata->cy);
+}
+
+#endif /* COPY_PASTE */
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