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/*
* Copyright (c) 2020, the SerenityOS developers.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <AK/Debug.h>
#include <LibLine/Editor.h>
namespace {
constexpr u32 ctrl(char c) { return c & 0x3f; }
}
namespace Line {
void KeyCallbackMachine::register_key_input_callback(Vector<Key> keys, Function<bool(Editor&)> callback)
{
m_key_callbacks.set(keys, make<KeyCallback>(move(callback)));
}
void KeyCallbackMachine::key_pressed(Editor& editor, Key key)
{
#if CALLBACK_MACHINE_DEBUG
dbgln("Key<{}, {}> pressed, seq_length={}, {} things in the matching vector", key.key, key.modifiers, m_sequence_length, m_current_matching_keys.size());
#endif
if (m_sequence_length == 0) {
VERIFY(m_current_matching_keys.is_empty());
for (auto& it : m_key_callbacks) {
if (it.key.first() == key)
m_current_matching_keys.append(it.key);
}
if (m_current_matching_keys.is_empty()) {
m_should_process_this_key = true;
return;
}
}
++m_sequence_length;
Vector<Vector<Key>> old_macthing_keys;
swap(m_current_matching_keys, old_macthing_keys);
for (auto& okey : old_macthing_keys) {
if (okey.size() < m_sequence_length)
continue;
if (okey[m_sequence_length - 1] == key)
m_current_matching_keys.append(okey);
}
if (m_current_matching_keys.is_empty()) {
// Insert any keys that were captured
if (!old_macthing_keys.is_empty()) {
auto& keys = old_macthing_keys.first();
for (size_t i = 0; i < m_sequence_length - 1; ++i)
editor.insert(keys[i].key);
}
m_sequence_length = 0;
m_should_process_this_key = true;
return;
}
#if CALLBACK_MACHINE_DEBUG
dbgln("seq_length={}, matching vector:", m_sequence_length);
for (auto& key : m_current_matching_keys) {
for (auto& k : key)
dbgln(" {}, {}", k.key, k.modifiers);
dbgln("");
}
#endif
m_should_process_this_key = false;
for (auto& key : m_current_matching_keys) {
if (key.size() == m_sequence_length) {
m_should_process_this_key = m_key_callbacks.get(key).value()->callback(editor);
m_sequence_length = 0;
m_current_matching_keys.clear();
return;
}
}
}
void KeyCallbackMachine::interrupted(Editor& editor)
{
m_sequence_length = 0;
m_current_matching_keys.clear();
if (auto callback = m_key_callbacks.get({ ctrl('C') }); callback.has_value())
m_should_process_this_key = callback.value()->callback(editor);
else
m_should_process_this_key = true;
}
}
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