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// Normalizer of key events
#ifndef MOZC_SESSION_KEY_EVENT_NORMALIZER_H_
#define MOZC_SESSION_KEY_EVENT_NORMALIZER_H_
#include "base/base.h"
namespace mozc {
namespace commands {
class KeyEvent;
}
class KeyEventNormalizer {
public:
static bool ToUint64(const commands::KeyEvent &key_event, uint64 *key) {
const uint16 modifier_keys = GetModifiers(key_event);
const uint16 special_key = key_event.has_special_key() ?
key_event.special_key() : commands::KeyEvent::NO_SPECIALKEY;
const uint32 key_code = key_event.has_key_code() ?
key_event.key_code() : 0;
// Make sure the translation from the obsolete spesification.
// key_code should no longer contain control characters.
if (0 < key_code && key_code <= 32) {
return false;
}
// uint64 = |Modifiers(16bit)|SpecialKey(16bit)|Unicode(32bit)|.
*key = (static_cast<uint64>(modifier_keys) << 48) +
(static_cast<uint64>(special_key) << 32) + static_cast<uint64>(key_code);
return true;
}
private:
static uint16 GetModifiers(const commands::KeyEvent &key_event) {
uint16 modifiers = 0;
if (key_event.has_modifiers()) {
modifiers = key_event.modifiers();
} else {
for (size_t i = 0; i < key_event.modifier_keys_size(); ++i) {
modifiers |= key_event.modifier_keys(i);
}
}
return modifiers;
}
// Should never been allocated.
DISALLOW_COPY_AND_ASSIGN(KeyEventNormalizer);
};
} // namespace mozc
#endif // MOZC_SESSION_KEY_EVENT_NORMALIZER_H_