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