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-rw-r--r--input.c528
1 files changed, 528 insertions, 0 deletions
diff --git a/input.c b/input.c
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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
+ * https://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 "extern.h"
+
+#define INPUTLINE (flayer->l_height - 1)
+
+static void InpProcess __P((char **, int *));
+static void InpAbort __P((void));
+static void InpRedisplayLine __P((int, int, int, int));
+
+extern struct layer *flayer;
+extern struct display *display;
+extern struct mchar mchar_blank, mchar_so;
+
+struct inpline
+{
+ char buf[MAXSTR+1]; /* text buffer */
+ int len; /* length of the editible string */
+ int pos; /* cursor position in editable string */
+ struct inpline *next, *prev;
+};
+
+/* 'inphist' is used to store the current input when scrolling through history.
+ * inpline->prev == history-prev
+ * inpline->next == history-next
+ */
+static struct inpline inphist;
+
+struct inpdata
+{
+ struct inpline inp;
+ int inpmaxlen; /* MAXSTR, or less, if caller has shorter buffer */
+ char *inpstring; /* the prompt */
+ int inpstringlen; /* length of the prompt */
+ int inpmode; /* INP_NOECHO, INP_RAW, INP_EVERY */
+ void (*inpfinfunc) __P((char *buf, int len, char *priv));
+ char *priv; /* private data for finfunc */
+ int privdata; /* private data space */
+ char *search; /* the search string */
+};
+
+static struct LayFuncs InpLf =
+{
+ InpProcess,
+ InpAbort,
+ InpRedisplayLine,
+ DefClearLine,
+ DefRewrite,
+ DefResize,
+ DefRestore,
+ 0
+};
+
+/*
+** Here is the input routine
+*/
+
+/* called once, after InitOverlayPage in Input() or Isearch() */
+void
+inp_setprompt(p, s)
+char *p, *s;
+{
+ struct inpdata *inpdata;
+
+ inpdata = (struct inpdata *)flayer->l_data;
+ if (p)
+ {
+ inpdata->inpstringlen = strlen(p);
+ inpdata->inpstring = p;
+ }
+ if (s)
+ {
+ if (s != inpdata->inp.buf)
+ strncpy(inpdata->inp.buf, s, sizeof(inpdata->inp.buf) - 1);
+ inpdata->inp.buf[sizeof(inpdata->inp.buf) - 1] = 0;
+ inpdata->inp.pos = inpdata->inp.len = strlen(inpdata->inp.buf);
+ }
+ InpRedisplayLine(INPUTLINE, 0, flayer->l_width - 1, 0);
+ flayer->l_x = inpdata->inpstringlen + (inpdata->inpmode & INP_NOECHO ? 0 : inpdata->inp.pos);
+ flayer->l_y = INPUTLINE;
+}
+
+/*
+ * We dont use HS status line with Input().
+ * If we would use it, then we should check e_tgetflag("es") if
+ * we are allowed to use esc sequences there.
+ *
+ * mode is an OR of
+ * INP_NOECHO == suppress echoing of characters.
+ * INP_RAW == raw mode. call finfunc after each character typed.
+ * INP_EVERY == digraph mode.
+ */
+void
+Input(istr, len, mode, finfunc, priv, data)
+char *istr;
+int len;
+int mode;
+void (*finfunc) __P((char *buf, int len, char *priv));
+char *priv;
+int data;
+{
+ int maxlen;
+ struct inpdata *inpdata;
+
+ if (!flayer)
+ return;
+
+ if (len > MAXSTR)
+ len = MAXSTR;
+ if (!(mode & INP_NOECHO))
+ {
+ maxlen = flayer->l_width - 1 - strlen(istr);
+ if (len > maxlen)
+ len = maxlen;
+ }
+ if (len < 0)
+ {
+ LMsg(0, "Width %d chars too small", -len);
+ return;
+ }
+ if (InitOverlayPage(sizeof(*inpdata), &InpLf, 1))
+ return;
+ flayer->l_mode = 1;
+ inpdata = (struct inpdata *)flayer->l_data;
+ inpdata->inpmaxlen = len;
+ inpdata->inpfinfunc = finfunc;
+ inpdata->inp.pos = inpdata->inp.len = 0;
+ inpdata->inp.prev = inphist.prev;
+ inpdata->inpmode = mode;
+ inpdata->privdata = data;
+ if (!priv)
+ priv = (char*)&inpdata->privdata;
+ inpdata->priv = priv;
+ inpdata->inpstringlen = 0;
+ inpdata->inpstring = NULL;
+ inpdata->search = NULL;
+ if (istr)
+ inp_setprompt(istr, (char *)NULL);
+}
+
+static void
+erase_chars(inpdata, from, to, x, mv)
+struct inpdata *inpdata;
+char *from;
+char *to;
+int x;
+int mv;
+{
+ int chng;
+ ASSERT(from < to);
+ if (inpdata->inp.len > to - inpdata->inp.buf)
+ bcopy(to, from, inpdata->inp.len - (to - inpdata->inp.buf));
+ chng = to - from;
+ if (mv)
+ {
+ x -= chng;
+ inpdata->inp.pos -= chng;
+ }
+ inpdata->inp.len -= chng;
+ if (!(inpdata->inpmode & INP_NOECHO))
+ {
+ struct mchar mc;
+ char *s = from < to ? from : to;
+ mc = mchar_so;
+ while (s < inpdata->inp.buf+inpdata->inp.len)
+ {
+ mc.image = *s++;
+ LPutChar(flayer, &mc, x++, INPUTLINE);
+ }
+ while (chng--)
+ LPutChar(flayer, &mchar_blank, x++, INPUTLINE);
+ x = inpdata->inpstringlen + inpdata->inp.pos;
+ LGotoPos(flayer, x, INPUTLINE);
+ }
+}
+
+static void
+InpProcess(ppbuf, plen)
+char **ppbuf;
+int *plen;
+{
+ int len, x;
+ char *pbuf;
+ char ch;
+ struct inpdata *inpdata;
+ struct display *inpdisplay;
+ int prev, next, search = 0;
+
+ inpdata = (struct inpdata *)flayer->l_data;
+ inpdisplay = display;
+
+#define RESET_SEARCH do { if (inpdata->search) Free(inpdata->search); } while (0)
+
+ LGotoPos(flayer, inpdata->inpstringlen + (inpdata->inpmode & INP_NOECHO ? 0 : inpdata->inp.pos), INPUTLINE);
+ if (ppbuf == 0)
+ {
+ InpAbort();
+ return;
+ }
+ x = inpdata->inpstringlen + inpdata->inp.pos;
+ len = *plen;
+ pbuf = *ppbuf;
+ while (len)
+ {
+ char *p = inpdata->inp.buf + inpdata->inp.pos;
+
+ ch = *pbuf++;
+ len--;
+ if (inpdata->inpmode & INP_EVERY)
+ {
+ inpdata->inp.buf[inpdata->inp.len] = ch;
+ if (ch)
+ {
+ display = inpdisplay;
+ (*inpdata->inpfinfunc)(inpdata->inp.buf, inpdata->inp.len, inpdata->priv);
+ ch = inpdata->inp.buf[inpdata->inp.len];
+ }
+ }
+ else if (inpdata->inpmode & INP_RAW)
+ {
+ display = inpdisplay;
+ (*inpdata->inpfinfunc)(&ch, 1, inpdata->priv); /* raw */
+ if (ch)
+ continue;
+ }
+ if (((unsigned char)ch & 0177) >= ' ' && ch != 0177 && inpdata->inp.len < inpdata->inpmaxlen)
+ {
+ if (inpdata->inp.len > inpdata->inp.pos)
+ bcopy(p, p+1, inpdata->inp.len - inpdata->inp.pos);
+ inpdata->inp.buf[inpdata->inp.pos++] = ch;
+ inpdata->inp.len++;
+
+ if (!(inpdata->inpmode & INP_NOECHO))
+ {
+ struct mchar mc;
+ mc = mchar_so;
+ mc.image = *p++;
+ LPutChar(flayer, &mc, x, INPUTLINE);
+ x++;
+ if (p < inpdata->inp.buf+inpdata->inp.len)
+ {
+ while (p < inpdata->inp.buf+inpdata->inp.len)
+ {
+ mc.image = *p++;
+ LPutChar(flayer, &mc, x++, INPUTLINE);
+ }
+ x = inpdata->inpstringlen + inpdata->inp.pos;
+ LGotoPos(flayer, x, INPUTLINE);
+ }
+ }
+ RESET_SEARCH;
+ }
+ else if ((ch == '\b' || ch == 0177) && inpdata->inp.pos > 0)
+ {
+ erase_chars(inpdata, p-1, p, x, 1);
+ RESET_SEARCH;
+ }
+ else if (ch == '\025') /* CTRL-U */
+ {
+ x = inpdata->inpstringlen;
+ if (inpdata->inp.len && !(inpdata->inpmode & INP_NOECHO))
+ {
+ LClearArea(flayer, x, INPUTLINE, x + inpdata->inp.len - 1, INPUTLINE, 0, 0);
+ LGotoPos(flayer, x, INPUTLINE);
+ }
+ inpdata->inp.len = inpdata->inp.pos = 0;
+ }
+ else if (ch == '\013') /* CTRL-K */
+ {
+ x = inpdata->inpstringlen + inpdata->inp.pos;
+ if (inpdata->inp.len > inpdata->inp.pos && !(inpdata->inpmode & INP_NOECHO))
+ {
+ LClearArea(flayer, x, INPUTLINE, x + inpdata->inp.len - inpdata->inp.pos - 1, INPUTLINE, 0, 0);
+ LGotoPos(flayer, x, INPUTLINE);
+ }
+ inpdata->inp.len = inpdata->inp.pos;
+ }
+ else if (ch == '\027' && inpdata->inp.pos > 0) /* CTRL-W */
+ {
+ char *oldp = p--;
+ while (p > inpdata->inp.buf && *p == ' ')
+ p--;
+ while (p > inpdata->inp.buf && *(p - 1) != ' ')
+ p--;
+ erase_chars(inpdata, p, oldp, x, 1);
+ RESET_SEARCH;
+ }
+ else if (ch == '\004' && inpdata->inp.pos < inpdata->inp.len) /* CTRL-D */
+ {
+ erase_chars(inpdata, p, p+1, x, 0);
+ RESET_SEARCH;
+ }
+ else if (ch == '\001' || (unsigned char)ch == 0201) /* CTRL-A */
+ {
+ LGotoPos(flayer, x -= inpdata->inp.pos, INPUTLINE);
+ inpdata->inp.pos = 0;
+ }
+ else if ((ch == '\002' || (unsigned char)ch == 0202) && inpdata->inp.pos > 0) /* CTRL-B */
+ {
+ LGotoPos(flayer, --x, INPUTLINE);
+ inpdata->inp.pos--;
+ }
+ else if (ch == '\005' || (unsigned char)ch == 0205) /* CTRL-E */
+ {
+ LGotoPos(flayer, x += inpdata->inp.len - inpdata->inp.pos, INPUTLINE);
+ inpdata->inp.pos = inpdata->inp.len;
+ }
+ else if ((ch == '\006' || (unsigned char)ch == 0206) && inpdata->inp.pos < inpdata->inp.len) /* CTRL-F */
+ {
+ LGotoPos(flayer, ++x, INPUTLINE);
+ inpdata->inp.pos++;
+ }
+ else if ((prev = ((ch == '\020' || (unsigned char)ch == 0220) && /* CTRL-P */
+ inpdata->inp.prev)) ||
+ (next = ((ch == '\016' || (unsigned char)ch == 0216) && /* CTRL-N */
+ inpdata->inp.next)) ||
+ (search = ((ch == '\022' || (unsigned char)ch == 0222) && inpdata->inp.prev)))
+ {
+ struct mchar mc;
+ struct inpline *sel;
+ int pos = -1;
+
+ mc = mchar_so;
+
+ if (prev)
+ sel = inpdata->inp.prev;
+ else if (next)
+ sel = inpdata->inp.next;
+ else
+ {
+ /* search */
+ inpdata->inp.buf[inpdata->inp.len] = 0; /* Remove the ctrl-r from the end */
+ if (!inpdata->search)
+ inpdata->search = SaveStr(inpdata->inp.buf);
+ for (sel = inpdata->inp.prev; sel; sel = sel->prev)
+ {
+ char *f;
+ if ((f = strstr(sel->buf, inpdata->search)))
+ {
+ pos = f - sel->buf;
+ break;
+ }
+ }
+ if (!sel)
+ continue; /* Did not find a match. Process the next input. */
+ }
+
+ if (inpdata->inp.len && !(inpdata->inpmode & INP_NOECHO))
+ LClearArea(flayer, inpdata->inpstringlen, INPUTLINE, inpdata->inpstringlen + inpdata->inp.len - 1, INPUTLINE, 0, 0);
+
+ if ((prev || search) && !inpdata->inp.next)
+ inphist = inpdata->inp;
+ memcpy(&inpdata->inp, sel, sizeof(struct inpline));
+ if (pos != -1)
+ inpdata->inp.pos = pos;
+ if (inpdata->inp.len > inpdata->inpmaxlen)
+ inpdata->inp.len = inpdata->inpmaxlen;
+ if (inpdata->inp.pos > inpdata->inp.len)
+ inpdata->inp.pos = inpdata->inp.len;
+
+ x = inpdata->inpstringlen;
+ p = inpdata->inp.buf;
+
+ if (!(inpdata->inpmode & INP_NOECHO))
+ {
+ while (p < inpdata->inp.buf+inpdata->inp.len)
+ {
+ mc.image = *p++;
+ LPutChar(flayer, &mc, x++, INPUTLINE);
+ }
+ }
+ x = inpdata->inpstringlen + inpdata->inp.pos;
+ LGotoPos(flayer, x, INPUTLINE);
+ }
+
+ else if (ch == '\003' || ch == '\007' || ch == '\033' ||
+ ch == '\000' || ch == '\n' || ch == '\r')
+ {
+ if (ch != '\n' && ch != '\r')
+ inpdata->inp.len = 0;
+ inpdata->inp.buf[inpdata->inp.len] = 0;
+
+ if (inpdata->inp.len && !(inpdata->inpmode & (INP_NOECHO | INP_RAW)))
+ {
+ struct inpline *store;
+
+ /* Look for a duplicate first */
+ for (store = inphist.prev; store; store = store->prev)
+ {
+ if (strcmp(store->buf, inpdata->inp.buf) == 0)
+ {
+ if (store->next)
+ store->next->prev = store->prev;
+ if (store->prev)
+ store->prev->next = store->next;
+ store->pos = inpdata->inp.pos;
+ break;
+ }
+ }
+
+ if (!store)
+ {
+ store = malloc(sizeof(struct inpline));
+ memcpy(store, &inpdata->inp, sizeof(struct inpline));
+ }
+ store->next = &inphist;
+ store->prev = inphist.prev;
+ if (inphist.prev)
+ inphist.prev->next = store;
+ inphist.prev = store;
+ }
+
+ flayer->l_data = 0; /* so inpdata does not get freed */
+ InpAbort(); /* redisplays... */
+ *ppbuf = pbuf;
+ *plen = len;
+ display = inpdisplay;
+ if ((inpdata->inpmode & INP_RAW) == 0)
+ (*inpdata->inpfinfunc)(inpdata->inp.buf, inpdata->inp.len, inpdata->priv);
+ else
+ (*inpdata->inpfinfunc)(pbuf - 1, 0, inpdata->priv);
+ if (inpdata->search)
+ free(inpdata->search);
+ free(inpdata);
+ return;
+ }
+ else
+ {
+ /* The user was searching, and then pressed some non-control input. So reset
+ * the search string. */
+ RESET_SEARCH;
+ }
+ }
+ if (!(inpdata->inpmode & INP_RAW))
+ {
+ flayer->l_x = inpdata->inpstringlen + (inpdata->inpmode & INP_NOECHO ? 0 : inpdata->inp.pos);
+ flayer->l_y = INPUTLINE;
+ }
+ *ppbuf = pbuf;
+ *plen = len;
+}
+
+static void
+InpAbort()
+{
+ LAY_CALL_UP(LayRedisplayLine(INPUTLINE, 0, flayer->l_width - 1, 0));
+ ExitOverlayPage();
+}
+
+static void
+InpRedisplayLine(y, xs, xe, isblank)
+int y, xs, xe, isblank;
+{
+ int q, r, s, l, v;
+ struct inpdata *inpdata;
+
+ inpdata = (struct inpdata *)flayer->l_data;
+ if (y != INPUTLINE)
+ {
+ LAY_CALL_UP(LayRedisplayLine(y, xs, xe, isblank));
+ return;
+ }
+ inpdata->inp.buf[inpdata->inp.len] = 0;
+ q = xs;
+ v = xe - xs + 1;
+ s = 0;
+ r = inpdata->inpstringlen;
+ if (v > 0 && q < r)
+ {
+ l = v;
+ if (l > r - q)
+ l = r - q;
+ LPutStr(flayer, inpdata->inpstring + q - s, l, &mchar_so, q, y);
+ q += l;
+ v -= l;
+ }
+ s = r;
+ r += inpdata->inp.len;
+ if (!(inpdata->inpmode & INP_NOECHO) && v > 0 && q < r)
+ {
+ l = v;
+ if (l > r - q)
+ l = r - q;
+ LPutStr(flayer, inpdata->inp.buf + q - s, l, &mchar_so, q, y);
+ q += l;
+ v -= l;
+ }
+ s = r;
+ r = flayer->l_width;
+ if (!isblank && v > 0 && q < r)
+ {
+ l = v;
+ if (l > r - q)
+ l = r - q;
+ LClearArea(flayer, q, y, q + l - 1, y, 0, 0);
+ q += l;
+ }
+}
+