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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#include <cctype>
#include <SDL_keyboard.h>
#include <SDL_keycode.h>
#include <SDL_events.h>
#include <SDL_stdinc.h>
#include "KeyInput.h"
#include "System/Log/ILog.h"
/**
* @brief keys
*
* Array of possible keys, and which are being pressed
*/
static std::map<int, bool> keys;
static SDL_Keymod keyMods;
namespace KeyInput {
bool IsKeyPressed(int idx) {
auto it = keys.find(idx);
if (it != keys.end())
return (it->second != 0);
return false;
}
void SetKeyModState(int mod, bool pressed) {
if (pressed) {
keyMods = SDL_Keymod(keyMods | mod);
} else {
keyMods = SDL_Keymod(keyMods & ~mod);
}
}
bool GetKeyModState(int mod) {
return (keyMods & mod);
}
/**
* Tests SDL keystates and sets values in key array
*/
void Update(int currKeycode, int fakeMetaKey)
{
int numKeys = 0;
auto state = SDL_GetKeyboardState(&numKeys);
for (int i = 0; i < numKeys; ++i) {
auto scancode = (SDL_Scancode)i;
auto keycode = SDL_GetKeyFromScancode(scancode);
keys[keycode] = (state[scancode] != 0);
}
keyMods = SDL_GetModState();
SetKeyModState(KMOD_GUI, keys[fakeMetaKey]);
keys[SDLK_LALT] = GetKeyModState(KMOD_ALT);
keys[SDLK_LCTRL] = GetKeyModState(KMOD_CTRL);
keys[SDLK_LGUI] = GetKeyModState(KMOD_GUI);
keys[SDLK_LSHIFT] = GetKeyModState(KMOD_SHIFT);
}
const std::map<int,bool>& GetPressedKeys()
{
return keys;
}
int GetNormalizedKeySymbol(int sym)
{
if (sym <= SDLK_DELETE) {
sym = tolower(sym);
}
else if (sym == SDLK_RSHIFT) { sym = SDLK_LSHIFT; }
else if (sym == SDLK_RCTRL) { sym = SDLK_LCTRL; }
else if (sym == SDLK_RGUI) { sym = SDLK_LGUI; }
else if (sym == SDLK_RALT) { sym = SDLK_LALT; }
return sym;
}
void ReleaseAllKeys()
{
for (auto key: keys) {
auto keycode = (SDL_Keycode)key.first;
auto scancode = SDL_GetScancodeFromKey(keycode);
if (keycode == SDLK_NUMLOCKCLEAR || keycode == SDLK_CAPSLOCK || keycode == SDLK_SCROLLLOCK)
continue;
if (!KeyInput::IsKeyPressed(keycode))
continue;
SDL_Event event;
event.type = event.key.type = SDL_KEYUP;
event.key.state = SDL_RELEASED;
event.key.keysym.sym = keycode;
event.key.keysym.mod = 0;
event.key.keysym.scancode = scancode;
SDL_PushEvent(&event);
}
}
} // namespace KeyInput
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