Add support for function keys F1-F12

src/keys.cc

@@ -80,6 +80,29 @@ KeyList parse_keys(const String& str)
                     pos = end_pos;
                     continue;
                 }
+                if ((keyname[0] == 'f' or keyname[0] == 'F') and
+                    keyname.length() <= 3)
+                {
+
+                    int val = 0;
+                    for (auto i = 1_byte; i < keyname.length(); ++i)
+                    {
+                        char c = keyname[i];
+                        if (c >= '0' and c <= '9')
+                            val = val*10 + c - '0';
+                        else
+                        {
+                            val = -1;
+                            break;
+                        }
+                    }
+                    if (val >= 1 and val <= 12)
+                    {
+                        result.push_back(Key{ modifier, Key::F1 + (val - 1) });
+                        pos = end_pos;
+                        continue;
+                    }
+                }
             }
         }
         result.push_back({Key::Modifiers::None, Codepoint(str[pos])});
@@ -98,6 +121,11 @@ String key_to_str(Key key)
         named = true;
         res = it->first;
     }
+    else if (key.key >= Key::F1 and key.key < Key::F12)
+    {
+        named = true;
+        res = "F" + to_string((int)(Codepoint)key.key - (int)(Codepoint)Key::F1 + 1);
+    }
     else
         res = codepoint_to_str(key.key);
 

src/keys.hh

@@ -32,6 +32,18 @@ struct Key
         Home,
         End,
         BackTab,
+        F1,
+        F2,
+        F3,
+        F4,
+        F5,
+        F6,
+        F7,
+        F8,
+        F9,
+        F10,
+        F11,
+        F12,
         Invalid,
     };
 

src/ncurses.cc

@@ -354,6 +354,12 @@ Key NCursesUI::get_key()
     case KEY_BTAB: return Key::BackTab;
     }
 
+    for (int i = 0; i < 12; ++i)
+    {
+        if (c == KEY_F(i+1))
+            return Key::F1 + i;
+    }
+
     if (c >= 0 and c < 256)
     {
        ungetch(c);