add auto fill mode into grub_putchar, to fix the ">80 characters in one line" problem.

ChangeLog

@@ -1,3 +1,23 @@
+2000-09-06  OKUJI Yoshinori  <okuji@gnu.org>
+
+	* stage2/char_io.c [!STAGE1_5] (auto_fill): New variable.
+	[!STAGE1_5] (get_cmdline): Save AUTO_FILL in SAVED_AUTO_FILL in
+	the beginning and restore AUTO_FILL before return.
+	Set AUTO_FILL to one and zero before and after calling
+	print_completions, respectively.
+	(grub_putchar) [!STAGE1_5]: Use a static variable COL to track
+	the position of the cursor. If C is a carriage return, clear
+	COL. If C is a backspace and COL is positive, decrease COL. If C
+	is a printable character, increase COL. In this case, if
+	AUTO_FILL is non-zero and COL is greater than or equal to 79,
+	put a newline automatically.
+	* stage2/shared.h (auto_fill): Declared.
+	* stage2/stage2.c (run_menu): In the menu interface, disable the
+	auto fill mode (i.e. set AUTO_FILL to zero), and enable it again
+	when booting an entry.
+	(cmain): Initialize AUTO_FILL (i.e. set it to one) in the
+	beginning of the loop.
+	
 2000-09-06  OKUJI Yoshinori  <okuji@gnu.org>
 
 	Add support for "boot previously booted entry by default", based

stage2/char_io.c

@@ -25,6 +25,10 @@
 # include <serial.h>
 #endif
 
+#ifndef STAGE1_5
+int auto_fill = 1;
+#endif
+
 void
 print_error (void)
 {
@@ -269,7 +273,9 @@ get_cmdline (char *prompt, char *cmdline, int maxlen,
   char *buf = (char *) CMDLINE_BUF;
   /* The kill buffer.  */
   char *kill_buf = (char *) KILL_BUF;
-
+  /* The original state of AUTO_FILL.  */
+  int saved_auto_fill = auto_fill;
+  
   /* Nested function definitions for code simplicity.  */
 
   /* The forward declarations of nested functions are prefixed
@@ -555,6 +561,9 @@ get_cmdline (char *prompt, char *cmdline, int maxlen,
   lpos = llen;
   grub_strcpy (buf, cmdline);
 
+  /* Disable the auto fill mode.  */
+  auto_fill = 0;
+  
   cl_init ();
 
   while (ASCII_CHAR (c = getkey ()) != '\n' && ASCII_CHAR (c) != '\r')
@@ -607,7 +616,11 @@ get_cmdline (char *prompt, char *cmdline, int maxlen,
 		   completion.  */
 		grub_memmove (completion_buffer, buf + i, lpos - i);
 		completion_buffer[lpos - i] = 0;
+		/* Enable the auto fill mode temporarily.  */
+		auto_fill = 1;
 		ret = print_completions (is_filename, 1);
+		/* Disable the auto fill mode again.  */
+		auto_fill = 0;
 		errnum = ERR_NONE;
 
 		if (ret >= 0)
@@ -621,7 +634,11 @@ get_cmdline (char *prompt, char *cmdline, int maxlen,
 			   the list.  */
 
 			grub_putchar ('\n');
+			/* Enable the auto fill mode temporarily.  */
+			auto_fill = 1;
 			print_completions (is_filename, 0);
+			/* Disable the auto fill mode again.  */
+			auto_fill = 0;
 			errnum = ERR_NONE;
 		      }
 		  }
@@ -774,6 +791,9 @@ get_cmdline (char *prompt, char *cmdline, int maxlen,
   if (readline && lpos < llen)
     add_history (cmdline, 0);
 
+  /* Restore the auto fill mode.  */
+  auto_fill = saved_auto_fill;
+  
   return 0;
 }
 
@@ -1056,6 +1076,10 @@ checkkey (void)
 void
 grub_putchar (int c)
 {
+#ifndef STAGE1_5
+  static int col = 0;
+#endif
+  
   if (c == '\n')
     grub_putchar ('\r');
   
@@ -1065,7 +1089,25 @@ grub_putchar (int c)
   console_putchar (c);
   
 #else /* ! STAGE1_5 */
-  
+
+  /* Track the cursor by software here.  */
+  /* XXX: This doesn't handle horizontal or vertical tabs.  */
+  if (c == '\r')
+    col = 0;
+  else if (c == '\b')
+    {
+      if (col > 0)
+	col--;
+    }
+  else if (c >= ' ' && c <= '~')
+    {
+      /* Fold a line only if AUTO_FILL is true.  */
+      if (auto_fill && col >= 79)
+	grub_putchar ('\n');
+
+      col++;
+    }
+
   if (terminal & TERMINAL_CONSOLE)
     console_putchar (c);
 

stage2/shared.h

@@ -750,6 +750,9 @@ extern kernel_t kernel_type;
 extern int show_menu;
 extern int grub_timeout;
 
+/* Control the auto fill mode.  */
+extern int auto_fill;
+
 /* This variable specifies which console should be used.  */
 extern int terminal;
 

stage2/stage2.c

@@ -327,6 +327,9 @@ restart:
   /* Only display the menu if the user wants to see it. */
   if (show_menu)
     {
+      /* Disable the auto fill mode.  */
+      auto_fill = 0;
+      
       init_page ();
 #ifndef GRUB_UTIL
 # ifdef SUPPORT_SERIAL
@@ -682,7 +685,11 @@ restart:
     }
 
   /* Attempt to boot an entry.  */
+  
  boot_entry:
+  /* Enable the auto fill mode.  */
+  auto_fill = 1;
+  
   while (1)
     {
       cls ();
@@ -786,6 +793,7 @@ cmain (void)
   /* Never return.  */
   for (;;)
     {
+      auto_fill = 1;
       config_len = 0;
       menu_len = 0;
       num_entries = 0;