File mc-multi-press-f-keys.patch of Package mc

http://www.midnight-commander.org/ticket/287
---
 lib/tty/key.c       |   17 +++++++++++++++--
 lib/tty/tty-slang.h |    1 +
 2 files changed, 16 insertions(+), 2 deletions(-)

Index: mc-4.8.23/lib/tty/key.c
===================================================================
--- mc-4.8.23.orig/lib/tty/key.c
+++ mc-4.8.23/lib/tty/key.c
@@ -1050,10 +1050,13 @@ correct_key_code (int code)
         mod = KEY_M_SHIFT;
     }
 
-    /* F0 is the same as F10 for out purposes */
+    /* F0 is the same as F10 for our purposes */
     if (c == KEY_F (0))
         c = KEY_F (10);
 
+    if (c == KEY_F_IMMUTABLE (0))
+        c = KEY_F_IMMUTABLE (10);
+
     /*
      * We are not interested if Ctrl was pressed when entering control
      * characters, so assume that it was.  When checking for such keys,
@@ -1126,6 +1129,16 @@ correct_key_code (int code)
     if (c >= KEY_F (1) && c <= KEY_F (20))
         mod &= ~KEY_M_SHIFT;
 
+    /*
+     * Numerals may require modifilers with some keymaps or on obscure
+     * keyboards (e. g. F4 = Esc Shift+4). We have to ignore all
+     * modifiers while interpreting Esc + Numeral.
+     */
+    if (c >= KEY_F_IMMUTABLE (1) && c <= KEY_F_IMMUTABLE (10)) {
+	c += KEY_F (0) - KEY_F_IMMUTABLE (0);
+	mod &= ~KEY_M_MASK;
+    }
+
     if (!mc_global.tty.alternate_plus_minus)
         switch (c)
         {
@@ -1909,7 +1922,7 @@ get_key_code (int no_delay)
         {
             /* Convert escape-digits to F-keys */
             if (g_ascii_isdigit (c))
-                c = KEY_F (c - '0');
+                c = KEY_F_IMMUTABLE (c - '0');
             else if (c == ' ')
                 c = ESC_CHAR;
             else
Index: mc-4.8.23/lib/tty/tty-slang.h
===================================================================
--- mc-4.8.23.orig/lib/tty/tty-slang.h
+++ mc-4.8.23/lib/tty/tty-slang.h
@@ -11,6 +11,7 @@
 /*** typedefs(not structures) and defined constants **********************************************/
 
 #define KEY_F(x) (1000 + x)
+#define KEY_F_IMMUTABLE(x) (970+x)
 
 #define ACS_VLINE    SLSMG_VLINE_CHAR
 #define ACS_HLINE    SLSMG_HLINE_CHAR