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Cleanup fhandler_console::read for readability 

- Drop virtual_key_code (only used once)
- Convert macros wch and control_key_state to const vars
  unicode_char and  ctrl_key_state.
- Fix formatting

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
This commit is contained in:
Corinna Vinschen 2017-01-19 21:58:05 +01:00
parent dd7c87ae87
commit ef00718487
1 changed files with 20 additions and 22 deletions
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42
winsup/cygwin/fhandler_console.cc
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@ -363,21 +363,22 @@ fhandler_console::read (void *pv, size_t& buflen)
goto err; /* seems to be failure */
}
const WCHAR &unicode_char = input_rec.Event.KeyEvent.uChar.UnicodeChar;
const DWORD &ctrl_key_state = input_rec.Event.KeyEvent.dwControlKeyState;
/* check the event that occurred */
switch (input_rec.EventType)
{
case KEY_EVENT:
#define virtual_key_code (input_rec.Event.KeyEvent.wVirtualKeyCode)
#define control_key_state (input_rec.Event.KeyEvent.dwControlKeyState)
con.nModifiers = 0;
#ifdef DEBUGGING
/* allow manual switching to/from raw mode via ctrl-alt-scrolllock */
if (input_rec.Event.KeyEvent.bKeyDown &&
virtual_key_code == VK_SCROLL &&
((control_key_state & (LEFT_ALT_PRESSED | LEFT_CTRL_PRESSED)) == (LEFT_ALT_PRESSED | LEFT_CTRL_PRESSED))
)
if (input_rec.Event.KeyEvent.bKeyDown
&& input_rec.Event.KeyEvent.wVirtualKeyCode == VK_SCROLL
&& (ctrl_key_state & (LEFT_ALT_PRESSED | LEFT_CTRL_PRESSED))
== (LEFT_ALT_PRESSED | LEFT_CTRL_PRESSED))
{
set_raw_win32_keyboard_mode (!con.raw_win32_keyboard_mode);
continue;
@ -398,8 +399,6 @@ fhandler_console::read (void *pv, size_t& buflen)
break;
}
#define wch (input_rec.Event.KeyEvent.uChar.UnicodeChar)
/* Ignore key up events, except for Alt+Numpad events. */
if (!input_rec.Event.KeyEvent.bKeyDown &&
!is_alt_numpad_event (&input_rec))
@ -410,13 +409,13 @@ fhandler_console::read (void *pv, size_t& buflen)
&& is_alt_numpad_key (&input_rec))
continue;
if (control_key_state & SHIFT_PRESSED)
if (ctrl_key_state & SHIFT_PRESSED)
con.nModifiers |= 1;
if (control_key_state & RIGHT_ALT_PRESSED)
if (ctrl_key_state & RIGHT_ALT_PRESSED)
con.nModifiers |= 2;
if (control_key_state & CTRL_PRESSED)
if (ctrl_key_state & CTRL_PRESSED)
con.nModifiers |= 4;
if (control_key_state & LEFT_ALT_PRESSED)
if (ctrl_key_state & LEFT_ALT_PRESSED)
con.nModifiers |= 8;
/* Allow Backspace to emit ^? and escape sequences. */
@ -424,7 +423,7 @@ fhandler_console::read (void *pv, size_t& buflen)
{
char c = con.backspace_keycode;
nread = 0;
if (control_key_state & ALT_PRESSED)
if (ctrl_key_state & ALT_PRESSED)
{
if (con.metabit)
c |= 0x80;
@ -437,10 +436,10 @@ fhandler_console::read (void *pv, size_t& buflen)
}
/* Allow Ctrl-Space to emit ^@ */
else if (input_rec.Event.KeyEvent.wVirtualKeyCode == VK_SPACE
&& (control_key_state & CTRL_PRESSED)
&& !(control_key_state & ALT_PRESSED))
&& (ctrl_key_state & CTRL_PRESSED)
&& !(ctrl_key_state & ALT_PRESSED))
toadd = "";
else if (wch == 0
else if (unicode_char == 0
/* arrow/function keys */
|| (input_rec.Event.KeyEvent.dwControlKeyState & ENHANCED_KEY))
{
@ -454,17 +453,17 @@ fhandler_console::read (void *pv, size_t& buflen)
}
else
{
nread = con.con_to_str (tmp + 1, 59, wch);
nread = con.con_to_str (tmp + 1, 59, unicode_char);
/* Determine if the keystroke is modified by META. The tricky
part is to distinguish whether the right Alt key should be
recognized as Alt, or as AltGr. */
bool meta =
/* Alt but not AltGr (= left ctrl + right alt)? */
(control_key_state & ALT_PRESSED) != 0
&& ((control_key_state & CTRL_PRESSED) == 0
(ctrl_key_state & ALT_PRESSED) != 0
&& ((ctrl_key_state & CTRL_PRESSED) == 0
/* but also allow Alt-AltGr: */
|| (control_key_state & ALT_PRESSED) == ALT_PRESSED
|| (wch <= 0x1f || wch == 0x7f));
|| (ctrl_key_state & ALT_PRESSED) == ALT_PRESSED
|| (unicode_char <= 0x1f || unicode_char == 0x7f));
if (!meta)
{
/* Determine if the character is in the current multibyte
@ -492,7 +491,6 @@ fhandler_console::read (void *pv, size_t& buflen)
con.nModifiers &= ~4;
}
}
#undef wch
break;
case MOUSE_EVENT: