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Cleaned up WindowsScanCodeToSDLScanCode() so VKeytoScancode() always takes precedence for the keys it handles and the rest of the logic is easier to read.

This commit is contained in:
Sam Lantinga 2017-08-12 12:56:28 -07:00
parent 34769abd46
commit 47c2c7d585
1 changed files with 53 additions and 49 deletions
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102
src/video/windows/SDL_windowsevents.c
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@ -143,70 +143,74 @@ static SDL_Scancode
WindowsScanCodeToSDLScanCode(LPARAM lParam, WPARAM wParam)
{
SDL_Scancode code;
char bIsExtended;
int nScanCode = (lParam >> 16) & 0xFF;
SDL_bool bIsExtended = (lParam & (1 << 24)) != 0;
/* 0x45 here to work around both pause and numlock sharing the same scancode, so use the VK key to tell them apart */
if (nScanCode == 0 || nScanCode == 0x45) {
return VKeytoScancode(wParam);
}
code = VKeytoScancode(wParam);
if (nScanCode > 127)
return SDL_SCANCODE_UNKNOWN;
if (code == SDL_SCANCODE_UNKNOWN && nScanCode <= 127) {
code = windows_scancode_table[nScanCode];
code = windows_scancode_table[nScanCode];
bIsExtended = (lParam & (1 << 24)) != 0;
if (!bIsExtended) {
switch (code) {
case SDL_SCANCODE_HOME:
return SDL_SCANCODE_KP_7;
case SDL_SCANCODE_UP:
return SDL_SCANCODE_KP_8;
case SDL_SCANCODE_PAGEUP:
return SDL_SCANCODE_KP_9;
case SDL_SCANCODE_LEFT:
return SDL_SCANCODE_KP_4;
case SDL_SCANCODE_RIGHT:
return SDL_SCANCODE_KP_6;
case SDL_SCANCODE_END:
return SDL_SCANCODE_KP_1;
case SDL_SCANCODE_DOWN:
return SDL_SCANCODE_KP_2;
case SDL_SCANCODE_PAGEDOWN:
return SDL_SCANCODE_KP_3;
case SDL_SCANCODE_INSERT:
return SDL_SCANCODE_KP_0;
case SDL_SCANCODE_DELETE:
return SDL_SCANCODE_KP_PERIOD;
case SDL_SCANCODE_PRINTSCREEN:
return SDL_SCANCODE_KP_MULTIPLY;
default:
break;
}
/* prefer virtual keycodes over scancodes for extended keys */
} else {
SDL_Scancode vc = VKeytoScancode(wParam);
if (vc != SDL_SCANCODE_UNKNOWN) {
code = vc;
} else {
if (bIsExtended) {
switch (code) {
case SDL_SCANCODE_RETURN:
return SDL_SCANCODE_KP_ENTER;
code = SDL_SCANCODE_KP_ENTER;
break;
case SDL_SCANCODE_LALT:
return SDL_SCANCODE_RALT;
code = SDL_SCANCODE_RALT;
break;
case SDL_SCANCODE_LCTRL:
return SDL_SCANCODE_RCTRL;
code = SDL_SCANCODE_RCTRL;
break;
case SDL_SCANCODE_SLASH:
return SDL_SCANCODE_KP_DIVIDE;
code = SDL_SCANCODE_KP_DIVIDE;
break;
case SDL_SCANCODE_CAPSLOCK:
return SDL_SCANCODE_KP_PLUS;
code = SDL_SCANCODE_KP_PLUS;
break;
default:
break;
}
} else {
switch (code) {
case SDL_SCANCODE_HOME:
code = SDL_SCANCODE_KP_7;
break;
case SDL_SCANCODE_UP:
code = SDL_SCANCODE_KP_8;
break;
case SDL_SCANCODE_PAGEUP:
code = SDL_SCANCODE_KP_9;
break;
case SDL_SCANCODE_LEFT:
code = SDL_SCANCODE_KP_4;
break;
case SDL_SCANCODE_RIGHT:
code = SDL_SCANCODE_KP_6;
break;
case SDL_SCANCODE_END:
code = SDL_SCANCODE_KP_1;
break;
case SDL_SCANCODE_DOWN:
code = SDL_SCANCODE_KP_2;
break;
case SDL_SCANCODE_PAGEDOWN:
code = SDL_SCANCODE_KP_3;
break;
case SDL_SCANCODE_INSERT:
code = SDL_SCANCODE_KP_0;
break;
case SDL_SCANCODE_DELETE:
code = SDL_SCANCODE_KP_PERIOD;
break;
case SDL_SCANCODE_PRINTSCREEN:
code = SDL_SCANCODE_KP_MULTIPLY;
break;
default:
break;
}
}
}
return code;
}