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/*
* Copyright (c) 2020, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Function.h>
#include <AK/HashMap.h>
#include <AK/String.h>
#include <AK/Vector.h>
namespace Line {
class Editor;
struct Key {
enum Modifier : int {
None = 0,
Alt = 1,
};
int modifiers { None };
unsigned key { 0 };
Key(unsigned c)
: modifiers(None)
, key(c) {};
Key(unsigned c, int modifiers)
: modifiers(modifiers)
, key(c)
{
}
bool operator==(Key const& other) const
{
return other.key == key && other.modifiers == modifiers;
}
bool operator!=(Key const& other) const
{
return !(*this == other);
}
};
struct KeyCallback {
KeyCallback(Function<bool(Editor&)> cb)
: callback(move(cb))
{
}
Function<bool(Editor&)> callback;
};
class KeyCallbackMachine {
public:
void register_key_input_callback(Vector<Key>, Function<bool(Editor&)> callback);
void key_pressed(Editor&, Key);
void interrupted(Editor&);
bool should_process_last_pressed_key() const { return m_should_process_this_key; }
private:
HashMap<Vector<Key>, NonnullOwnPtr<KeyCallback>> m_key_callbacks;
Vector<Vector<Key>> m_current_matching_keys;
size_t m_sequence_length { 0 };
bool m_should_process_this_key { true };
};
}
namespace AK {
template<>
struct Traits<Line::Key> : public GenericTraits<Line::Key> {
static constexpr bool is_trivial() { return true; }
static unsigned hash(Line::Key k) { return pair_int_hash(k.key, k.modifiers); }
};
template<>
struct Traits<Vector<Line::Key>> : public GenericTraits<Vector<Line::Key>> {
static constexpr bool is_trivial() { return false; }
static unsigned hash(Vector<Line::Key> const& ks)
{
unsigned h = 0;
for (auto& k : ks)
h ^= Traits<Line::Key>::hash(k);
return h;
}
};
}
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