RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-25 11:17:43 +00:00
Code Issues Activity Actions
serenity/Games/Chess/ChessWidget.cpp
AnicJov 4d9837d792 Chess: Add ability to replay moves 
This patch allows the user to go back and forward in move history
to replay moves from the game. This is view-only however, and as soon
as a move is made the board returns to it's current state. This will
work well for replaying games loaded in with PGN files, once that's
implemented.
2020-12-10 20:40:51 +01:00

447 lines
16 KiB
C++
Raw Blame History

/*
* 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 "ChessWidget.h"
#include "PromotionDialog.h"
#include <AK/String.h>
#include <LibCore/DateTime.h>
#include <LibCore/File.h>
#include <LibGUI/MessageBox.h>
#include <LibGUI/Painter.h>
#include <LibGfx/Font.h>
#include <unistd.h>
ChessWidget::ChessWidget(const StringView& set)
{
set_piece_set(set);
}
ChessWidget::ChessWidget()
: ChessWidget("stelar7")
{
}
ChessWidget::~ChessWidget()
{
}
void ChessWidget::paint_event(GUI::PaintEvent& event)
{
GUI::Widget::paint_event(event);
GUI::Painter painter(*this);
painter.add_clip_rect(event.rect());
size_t tile_width = width() / 8;
size_t tile_height = height() / 8;
unsigned coord_rank_file = (side() == Chess::Colour::White) ? 0 : 7;
Chess::Board& active_board = (m_playback ? board_playback() : board());
Chess::Square::for_each([&](Chess::Square sq) {
Gfx::IntRect tile_rect;
if (side() == Chess::Colour::White) {
tile_rect = { sq.file * tile_width, (7 - sq.rank) * tile_height, tile_width, tile_height };
} else {
tile_rect = { (7 - sq.file) * tile_width, sq.rank * tile_height, tile_width, tile_height };
}
painter.fill_rect(tile_rect, (sq.is_light()) ? board_theme().light_square_color : board_theme().dark_square_color);
if (active_board.last_move().has_value() && (active_board.last_move().value().to == sq || active_board.last_move().value().from == sq)) {
painter.fill_rect(tile_rect, m_move_highlight_color);
}
if (m_coordinates) {
auto coord = sq.to_algebraic();
auto text_color = (sq.is_light()) ? board_theme().dark_square_color : board_theme().light_square_color;
auto shrunken_rect = tile_rect;
shrunken_rect.shrink(4, 4);
if (sq.rank == coord_rank_file)
painter.draw_text(shrunken_rect, coord.substring_view(0, 1), Gfx::Font::default_bold_font(), Gfx::TextAlignment::BottomRight, text_color);
if (sq.file == coord_rank_file)
painter.draw_text(shrunken_rect, coord.substring_view(1, 1), Gfx::Font::default_bold_font(), Gfx::TextAlignment::TopLeft, text_color);
}
if (!(m_dragging_piece && sq == m_moving_square)) {
auto bmp = m_pieces.get(active_board.get_piece(sq));
if (bmp.has_value()) {
painter.draw_scaled_bitmap(tile_rect, *bmp.value(), bmp.value()->rect());
}
}
return IterationDecision::Continue;
});
if (m_dragging_piece) {
auto bmp = m_pieces.get(active_board.get_piece(m_moving_square));
if (bmp.has_value()) {
auto center = m_drag_point - Gfx::IntPoint(tile_width / 2, tile_height / 2);
painter.draw_scaled_bitmap({ center, { tile_width, tile_height } }, *bmp.value(), bmp.value()->rect());
}
}
}
void ChessWidget::mousedown_event(GUI::MouseEvent& event)
{
GUI::Widget::mousedown_event(event);
auto square = mouse_to_square(event);
auto piece = board().get_piece(square);
if (drag_enabled() && piece.colour == board().turn() && !m_playback) {
m_dragging_piece = true;
m_drag_point = event.position();
m_moving_square = square;
update();
}
}
void ChessWidget::mouseup_event(GUI::MouseEvent& event)
{
GUI::Widget::mouseup_event(event);
if (!m_dragging_piece)
return;
m_dragging_piece = false;
auto target_square = mouse_to_square(event);
Chess::Move move = { m_moving_square, target_square };
if (board().is_promotion_move(move)) {
auto promotion_dialog = PromotionDialog::construct(*this);
if (promotion_dialog->exec() == PromotionDialog::ExecOK)
move.promote_to = promotion_dialog->selected_piece();
}
if (board().apply_move(move)) {
m_playback_move_number = board().moves().size();
m_playback = false;
m_board_playback = m_board;
if (board().game_result() != Chess::Board::Result::NotFinished) {
bool over = true;
String msg;
switch (board().game_result()) {
case Chess::Board::Result::CheckMate:
if (board().turn() == Chess::Colour::White) {
msg = "Black wins by Checkmate.";
} else {
msg = "White wins by Checkmate.";
}
break;
case Chess::Board::Result::StaleMate:
msg = "Draw by Stalemate.";
break;
case Chess::Board::Result::FiftyMoveRule:
update();
if (GUI::MessageBox::show(window(), "50 moves have elapsed without a capture. Claim Draw?", "Claim Draw?",
GUI::MessageBox::Type::Information, GUI::MessageBox::InputType::YesNo)
== GUI::Dialog::ExecYes) {
msg = "Draw by 50 move rule.";
} else {
over = false;
}
break;
case Chess::Board::Result::SeventyFiveMoveRule:
msg = "Draw by 75 move rule.";
break;
case Chess::Board::Result::ThreeFoldRepetition:
update();
if (GUI::MessageBox::show(window(), "The same board state has repeated three times. Claim Draw?", "Claim Draw?",
GUI::MessageBox::Type::Information, GUI::MessageBox::InputType::YesNo)
== GUI::Dialog::ExecYes) {
msg = "Draw by threefold repetition.";
} else {
over = false;
}
break;
case Chess::Board::Result::FiveFoldRepetition:
msg = "Draw by fivefold repetition.";
break;
case Chess::Board::Result::InsufficientMaterial:
msg = "Draw by insufficient material.";
break;
default:
ASSERT_NOT_REACHED();
}
if (over) {
set_drag_enabled(false);
update();
GUI::MessageBox::show(window(), msg, "Game Over", GUI::MessageBox::Type::Information);
}
} else {
maybe_input_engine_move();
}
}
update();
}
void ChessWidget::mousemove_event(GUI::MouseEvent& event)
{
GUI::Widget::mousemove_event(event);
if (!m_dragging_piece)
return;
m_drag_point = event.position();
update();
}
void ChessWidget::keydown_event(GUI::KeyEvent& event)
{
switch (event.key()) {
case KeyCode::Key_Left:
playback_move(PlaybackDirection::Backward);
break;
case KeyCode::Key_Right:
playback_move(PlaybackDirection::Forward);
break;
case KeyCode::Key_Up:
playback_move(PlaybackDirection::Last);
break;
case KeyCode::Key_Down:
playback_move(PlaybackDirection::First);
break;
case KeyCode::Key_Home:
playback_move(PlaybackDirection::First);
break;
case KeyCode::Key_End:
playback_move(PlaybackDirection::Last);
break;
default:
return;
}
update();
}
static String set_path = String("/res/icons/chess/sets/");
static RefPtr<Gfx::Bitmap> get_piece(const StringView& set, const StringView& image)
{
StringBuilder builder;
builder.append(set_path);
builder.append(set);
builder.append('/');
builder.append(image);
return Gfx::Bitmap::load_from_file(builder.build());
}
void ChessWidget::set_piece_set(const StringView& set)
{
m_piece_set = set;
m_pieces.set({ Chess::Colour::White, Chess::Type::Pawn }, get_piece(set, "white-pawn.png"));
m_pieces.set({ Chess::Colour::Black, Chess::Type::Pawn }, get_piece(set, "black-pawn.png"));
m_pieces.set({ Chess::Colour::White, Chess::Type::Knight }, get_piece(set, "white-knight.png"));
m_pieces.set({ Chess::Colour::Black, Chess::Type::Knight }, get_piece(set, "black-knight.png"));
m_pieces.set({ Chess::Colour::White, Chess::Type::Bishop }, get_piece(set, "white-bishop.png"));
m_pieces.set({ Chess::Colour::Black, Chess::Type::Bishop }, get_piece(set, "black-bishop.png"));
m_pieces.set({ Chess::Colour::White, Chess::Type::Rook }, get_piece(set, "white-rook.png"));
m_pieces.set({ Chess::Colour::Black, Chess::Type::Rook }, get_piece(set, "black-rook.png"));
m_pieces.set({ Chess::Colour::White, Chess::Type::Queen }, get_piece(set, "white-queen.png"));
m_pieces.set({ Chess::Colour::Black, Chess::Type::Queen }, get_piece(set, "black-queen.png"));
m_pieces.set({ Chess::Colour::White, Chess::Type::King }, get_piece(set, "white-king.png"));
m_pieces.set({ Chess::Colour::Black, Chess::Type::King }, get_piece(set, "black-king.png"));
}
Chess::Square ChessWidget::mouse_to_square(GUI::MouseEvent& event) const
{
size_t tile_width = width() / 8;
size_t tile_height = height() / 8;
if (side() == Chess::Colour::White) {
return { 7 - (event.y() / tile_height), event.x() / tile_width };
} else {
return { event.y() / tile_height, 7 - (event.x() / tile_width) };
}
}
RefPtr<Gfx::Bitmap> ChessWidget::get_piece_graphic(const Chess::Piece& piece) const
{
return m_pieces.get(piece).value();
}
void ChessWidget::reset()
{
m_playback = false;
m_playback_move_number = 0;
m_board_playback = Chess::Board();
m_board = Chess::Board();
m_side = (arc4random() % 2) ? Chess::Colour::White : Chess::Colour::Black;
m_drag_enabled = true;
maybe_input_engine_move();
update();
}
void ChessWidget::set_board_theme(const StringView& name)
{
// FIXME: Add some kind of themes.json
// The following Colours have been taken from lichess.org, but i'm pretty sure they took them from chess.com.
if (name == "Beige") {
m_board_theme = { "Beige", Color::from_rgb(0xb58863), Color::from_rgb(0xf0d9b5) };
} else if (name == "Green") {
m_board_theme = { "Green", Color::from_rgb(0x86a666), Color::from_rgb(0xffffdd) };
} else if (name == "Blue") {
m_board_theme = { "Blue", Color::from_rgb(0x8ca2ad), Color::from_rgb(0xdee3e6) };
} else {
set_board_theme("Beige");
}
}
void ChessWidget::maybe_input_engine_move()
{
if (!m_engine || board().turn() == side())
return;
bool drag_was_enabled = drag_enabled();
if (drag_was_enabled)
set_drag_enabled(false);
m_engine->get_best_move(board(), 4000, [this, drag_was_enabled](Chess::Move move) {
set_drag_enabled(drag_was_enabled);
ASSERT(board().apply_move(move));
m_playback_move_number = m_board.moves().size();
m_playback = false;
update();
});
}
void ChessWidget::playback_move(PlaybackDirection direction)
{
if (m_board.moves().is_empty())
return;
m_playback = true;
switch (direction) {
case PlaybackDirection::Backward:
if (m_playback_move_number == 0)
return;
m_board_playback = Chess::Board();
for (size_t i = 0; i < m_playback_move_number - 1; i++)
m_board_playback.apply_move(m_board.moves().at(i));
m_playback_move_number--;
break;
case PlaybackDirection::Forward:
if (m_playback_move_number + 1 > m_board.moves().size()) {
m_playback = false;
return;
}
m_board_playback.apply_move(m_board.moves().at(m_playback_move_number++));
if (m_playback_move_number == m_board.moves().size())
m_playback = false;
break;
case PlaybackDirection::First:
m_board_playback = Chess::Board();
m_playback_move_number = 0;
break;
case PlaybackDirection::Last:
while (m_playback) {
playback_move(PlaybackDirection::Forward);
}
break;
default:
ASSERT_NOT_REACHED();
}
update();
}
String ChessWidget::get_fen() const
{
return m_playback ? m_board_playback.to_fen() : m_board.to_fen();
}
bool ChessWidget::export_pgn(const StringView& export_path) const
{
auto file_or_error = Core::File::open(export_path, Core::File::WriteOnly);
if (file_or_error.is_error()) {
warnln("Couldn't open '{}': {}", export_path, file_or_error.error());
return false;
}
auto& file = *file_or_error.value();
// Tag Pair Section
file.write("[Event \"Casual Game\"]\n");
file.write("[Site \"SerenityOS Chess\"]\n");
file.write(String::formatted("[Date \"{}\"]\n", Core::DateTime::now().to_string("%Y.%m.%d")));
file.write("[Round \"1\"]\n");
String username(getlogin());
const String player1 = (!username.is_empty() ? username : "?");
const String player2 = (!m_engine.is_null() ? "SerenityOS ChessEngine" : "?");
file.write(String::formatted("[White \"{}\"]\n", m_side == Chess::Colour::White ? player1 : player2));
file.write(String::formatted("[Black \"{}\"]\n", m_side == Chess::Colour::Black ? player1 : player2));
file.write(String::formatted("[Result \"{}\"]\n", Chess::Board::result_to_points(m_board.game_result(), m_board.turn())));
file.write("[WhiteElo \"?\"]\n");
file.write("[BlackElo \"?\"]\n");
file.write("[Variant \"Standard\"]\n");
file.write("[TimeControl \"-\"]\n");
file.write("[Annotator \"SerenityOS Chess\"]\n");
file.write("\n");
// Movetext Section
for (size_t i = 0, move_no = 1; i < m_board.moves().size(); i += 2, move_no++) {
const String white = m_board.moves().at(i).to_algebraic();
if (i + 1 < m_board.moves().size()) {
const String black = m_board.moves().at(i + 1).to_algebraic();
file.write(String::formatted("{}. {} {} ", move_no, white, black));
} else {
file.write(String::formatted("{}. {} ", move_no, white));
}
}
file.write("{ ");
file.write(Chess::Board::result_to_string(m_board.game_result(), m_board.turn()));
file.write(" } ");
file.write(Chess::Board::result_to_points(m_board.game_result(), m_board.turn()));
file.write("\n");
file.close();
return true;
}
void ChessWidget::flip_board()
{
m_side = Chess::opposing_colour(m_side);
update();
}
void ChessWidget::resign()
{
if (m_engine && m_board.turn() != m_side) {
GUI::MessageBox::show(window(), "You can only resign on your turn.", "Resign", GUI::MessageBox::Type::Information);
return;
}
board().set_resigned(m_board.turn());
set_drag_enabled(false);
update();
const String msg = Chess::Board::result_to_string(m_board.game_result(), m_board.turn());
GUI::MessageBox::show(window(), msg, "Game Over", GUI::MessageBox::Type::Information);
}
Reference in a new issue View git blame Copy permalink