Work on multi-out terminal

normal/term.c

@@ -0,0 +1,128 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2002,2003,2005,2007,2008,2009  Free Software Foundation, Inc.
+ *
+ *  GRUB 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 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB 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 GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* The amount of lines counted by the pager.  */
+static int grub_more_lines;
+
+/* If the more pager is active.  */
+static int grub_more;
+
+static void
+process_newline (void)
+{
+  if (code == '\n')
+    {
+      grub_putcode ('\r');
+
+      grub_more_lines++;
+
+      if (grub_more && grub_more_lines == height - 1)
+	{
+	  char key;
+	  int pos = term->getxy ();
+
+	  /* Show --MORE-- on the lower left side of the screen.  */
+	  term->gotoxy (1, height - 1);
+	  grub_setcolorstate (GRUB_TERM_COLOR_HIGHLIGHT);
+	  grub_printf ("--MORE--");
+	  grub_setcolorstate (GRUB_TERM_COLOR_STANDARD);
+
+	  key = grub_getkey ();
+
+	  /* Remove the message.  */
+	  term->gotoxy (1, height - 1);
+	  grub_printf ("        ");
+	  term->gotoxy (pos >> 8, pos & 0xFF);
+
+	  /* Scroll one lines or an entire page, depending on the key.  */
+	  if (key == '\r' || key =='\n')
+	    grub_more_lines--;
+	  else
+	    grub_more_lines = 0;
+	}
+    }
+}
+
+void
+grub_set_more (int onoff)
+{
+  if (onoff == 1)
+    grub_more++;
+  else
+    grub_more--;
+
+  grub_more_lines = 0;
+}
+
+void
+grub_puts_terminal (const char *str, struct grub_term_output *term)
+{
+  grub_uint32_t code;
+  grub_ssize_t ret;
+  const char *ptr = str;
+  unsigned i;
+
+  while (*ptr)
+    {
+      ret = grub_utf8_to_ucs4 (&code, 1, ptr,
+			       grub_strlen (ptr), &ptr);
+      if (ret < 0)
+	{
+	  grub_putcode ('?', term);
+	  ptr++;
+	  continue;
+	}
+      else
+	grub_putcode (code, term);	
+    }
+}
+
+grub_uint16_t *
+grub_term_save_pos (void)
+{
+  struct grub_term_output *cur;
+  unsigned cnt = 0;
+  grub_uint16_t *ret, *ptr;
+  
+  for (cur = grub_term_outputs; cur; cur = cur->next)
+    if (cur->flags & GRUB_TERM_ACTIVE)
+      cnt++;
+
+  ret = grub_malloc (cnt * sizeof (ret[0]));
+  if (!ret)
+    return NULL;
+
+  for (cur = grub_term_outputs; cur; cur = cur->next)
+    if (cur->flags & GRUB_TERM_ACTIVE)
+      *ptr++ = cur->getxy ();
+
+  return ret;
+}
+
+void
+grub_term_restore_pos (grub_uint16_t *pos)
+{
+  struct grub_term_output *cur;
+
+  if (!pos)
+    return;
+
+  for (cur = grub_term_outputs; cur; cur = cur->next)
+    if (cur->flags & GRUB_TERM_ACTIVE)
+      cur->gotoxy ((*ptr & 0xff00) >> 8, *ptr & 0xff);
+}