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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#include "KeySet.h"
#include "KeyCodes.h"
#include "KeyBindings.h"
#include "System/Log/ILog.h"
#include "System/Util.h"
#include "System/Input/KeyInput.h"
#include <SDL_keycode.h>
#define DISALLOW_RELEASE_BINDINGS
/******************************************************************************/
//
// CKeySet
//
void CKeySet::Reset()
{
key = -1;
modifiers = 0;
}
void CKeySet::ClearModifiers()
{
modifiers &= ~(KS_ALT | KS_CTRL | KS_META | KS_SHIFT);
}
void CKeySet::SetAnyBit()
{
ClearModifiers();
modifiers |= KS_ANYMOD;
}
bool CKeySet::IsPureModifier() const
{
return (CKeyCodes::IsModifier(Key()) || (Key() == keyBindings->GetFakeMetaKey()));
}
CKeySet::CKeySet(int k, bool release)
{
key = k;
modifiers = 0;
if (KeyInput::GetKeyModState(KMOD_ALT)) { modifiers |= KS_ALT; }
if (KeyInput::GetKeyModState(KMOD_CTRL)) { modifiers |= KS_CTRL; }
if (KeyInput::GetKeyModState(KMOD_GUI)) { modifiers |= KS_META; }
if (KeyInput::GetKeyModState(KMOD_SHIFT)) { modifiers |= KS_SHIFT; }
#ifndef DISALLOW_RELEASE_BINDINGS
if (release) { modifiers |= KS_RELEASE; }
#endif
}
std::string CKeySet::GetString(bool useDefaultKeysym) const
{
std::string name;
std::string modstr;
if (keyCodes != NULL) {
if (useDefaultKeysym) {
name = keyCodes->GetDefaultName(key);
} else {
name = keyCodes->GetName(key);
}
}
#ifndef DISALLOW_RELEASE_BINDINGS
if (modifiers & KS_RELEASE) { modstr += "Up+"; }
#endif
if (modifiers & KS_ANYMOD) { modstr += "Any+"; }
if (modifiers & KS_ALT) { modstr += "Alt+"; }
if (modifiers & KS_CTRL) { modstr += "Ctrl+"; }
if (modifiers & KS_META) { modstr += "Meta+"; }
if (modifiers & KS_SHIFT) { modstr += "Shift+"; }
return (modstr + name);
}
bool CKeySet::ParseModifier(std::string& s, const std::string& token, const std::string& abbr)
{
if (s.find(token) == 0) {
s.erase(0, token.size());
return true;
}
if (s.find(abbr) == 0) {
s.erase(0, abbr.size());
return true;
}
return false;
}
bool CKeySet::Parse(const std::string& token, bool showerror)
{
Reset();
std::string s = StringToLower(token);
// parse the modifiers
while (!s.empty()) {
if (ParseModifier(s, "up+", "u+")) { modifiers |= KS_RELEASE; }
else if (ParseModifier(s, "any+", "*+")) { modifiers |= KS_ANYMOD; }
else if (ParseModifier(s, "alt+", "a+")) { modifiers |= KS_ALT; }
else if (ParseModifier(s, "ctrl+", "c+")) { modifiers |= KS_CTRL; }
else if (ParseModifier(s, "meta+", "m+")) { modifiers |= KS_META; }
else if (ParseModifier(s, "shift+", "s+")) { modifiers |= KS_SHIFT; }
else {
break;
}
}
#ifdef DISALLOW_RELEASE_BINDINGS
modifiers &= ~KS_RELEASE;
#endif
if (s.empty()) {
Reset();
if (showerror) LOG_L(L_ERROR, "KeySet: Missing key");
return false;
}
// remove ''s, if present
if ((s.size() >= 2) && (s[0] == '\'') && (s[s.size() - 1] == '\'')) {
s = s.substr(1, s.size() - 2);
}
if (s.find("0x") == 0) {
const char* start = (s.c_str() + 2);
char* end;
key = strtol(start, &end, 16);
if (end == start) {
Reset();
if (showerror) LOG_L(L_ERROR, "KeySet: Bad hex value: %s", s.c_str());
return false;
}
} else {
if ((keyCodes != NULL) && (key = keyCodes->GetCode(s)) < 0) {
Reset();
if (showerror) LOG_L(L_ERROR, "KeySet: Bad keysym: %s", s.c_str());
return false;
}
}
if (keyCodes != NULL && keyCodes->IsModifier(key)) {
modifiers |= KS_ANYMOD;
}
if (AnyMod()) {
ClearModifiers();
}
return true;
}
/******************************************************************************/
//
// CTimedKeyChain
//
void CTimedKeyChain::push_back(const int key, const spring_time t, const bool isRepeat)
{
assert(keyBindings);
// clear chain on timeout
const auto dropTime = t - spring_msecs(keyBindings->GetKeyChainTimeout());
if (!empty() && times.back() < dropTime) {
clear();
}
CKeySet ks(key, false);
// append repeating keystrokes only wjen they differ from the last
if (isRepeat && (!empty() && ks == back()))
return;
// When you want to press c,alt+b you will press the c(down),c(up),alt(down),b(down)
// -> the chain will be: c,Alt+alt,Alt+b
// this should now match "c,alt+b", so we need to get rid of the redundant Alt+alt .
// Still we want to support "Alt+alt,Alt+alt" (double click alt), so only override e.g. the last in chain
// when the new keypress is _not_ a modifier.
if (!empty() && !ks.IsPureModifier() && back().IsPureModifier() && (back().Mod() == ks.Mod())) {
times.back() = t;
back() = ks;
return;
}
// push new to front
CKeyChain::emplace_back(ks);
times.emplace_back(t);
}
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