Adding upstream version 4.6.2.upstream/4.6.2upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 528 insertions, 0 deletions

diff --git a/input.c b/input.c
new file mode 100644
index 0000000..c17cd15
--- /dev/null
+++ b/input.c
@@ -0,0 +1,528 @@
+/* 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 "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;
+    }
+}
+