Add support to copy text to clipboard.

Fix \n handling in paste from clipboard.

Signed-off-by: Andrea Odetti <mariofutire@gmail.com>

source/frontends/sdl/README.md

@@ -36,6 +36,10 @@ Some of the configuration options are exposed in the ``Settings`` menu. This is
 
 ``Left Alt`` and ``Right Alt`` emulate the Open and Solid Apple key.
 
+``Shift-Insert`` pastes the clipboard to the input key buffer.
+
+``Ctrl-Insert`` copies the text screen (in AppleWin this is ``Ctrl-PrintScreen``).
+
 ## Audio
 
 Audio works reasonably well, using AppleWin adaptive algorithm.

source/frontends/sdl/sdlframe.cpp

@@ -433,6 +433,17 @@ namespace sa2
               SDL_free(text);
             }
           }
+          else if (key.keysym.mod & KMOD_CTRL)
+          {
+            // in AppleWin this is Ctrl-PrintScreen
+            // but PrintScreen is not passed to SDL
+            char *pText;
+            const size_t size = Util_GetTextScreen(pText);
+            if (size)
+            {
+              SDL_SetClipboardText(pText);
+            }
+          }
           break;
         }
       }

source/linux/keyboard.cpp

@@ -110,10 +110,19 @@ void addTextToBuffer(const char * text)
 {
    while (*text)
    {
-     if (*text >= 0x20 && *text <= 0x7e)
+     switch (*text)
      {
-       addKeyToBuffer(*text);
-       ++text;
+       case '\n':
+       {
+        addKeyToBuffer(0x0d);
+        break;
+       }
+       case 0x20 ... 0x7e:
+       {
+        addKeyToBuffer(*text);
+        break;
+       }
      }
+     ++text;
    }
 }