blob: f839a18b27cdcb06123609077befd8fcc99152c2 [file] [log] [blame]
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
import 'dart:sky' as sky;
import 'dart:math';
import 'package:sky/mojo/activity.dart' as activity;
import 'package:sky/painting/text_style.dart';
import 'package:sky/rendering/flex.dart';
import 'package:sky/theme/colors.dart' as colors;
import 'package:sky/widgets.dart';
// Classic minesweeper-inspired game. The mouse controls are standard
// except for left + right combo which is not implemented. For touch,
// the duration of the pointer determines probing versus flagging.
//
// There are only 3 classes to understand. MineDiggerApp, which is
// contains all the logic and two classes that describe the mines:
// CoveredMineNode and ExposedMineNode, none of them holding state.
// Colors for each mine count (0-8):
const List<TextStyle> textStyles = const <TextStyle>[
const TextStyle(color: const Color(0xFF555555), fontWeight: bold),
const TextStyle(color: const Color(0xFF0094FF), fontWeight: bold), // blue
const TextStyle(color: const Color(0xFF13A023), fontWeight: bold), // green
const TextStyle(color: const Color(0xFFDA1414), fontWeight: bold), // red
const TextStyle(color: const Color(0xFF1E2347), fontWeight: bold), // black
const TextStyle(color: const Color(0xFF7F0037), fontWeight: bold), // dark red
const TextStyle(color: const Color(0xFF000000), fontWeight: bold),
const TextStyle(color: const Color(0xFF000000), fontWeight: bold),
const TextStyle(color: const Color(0xFF000000), fontWeight: bold),
];
enum CellState { covered, exploded, cleared, flagged, shown }
class MineDiggerApp extends App {
static const int rows = 9;
static const int cols = 9;
static const int totalMineCount = 11;
bool alive;
bool hasWon;
int detectedCount;
// |cells| keeps track of the positions of the mines.
List<List<bool>> cells;
// |uiState| keeps track of the visible player progess.
List<List<CellState>> uiState;
void initState() {
resetGame();
}
void resetGame() {
alive = true;
hasWon = false;
detectedCount = 0;
// Build the arrays.
cells = new List<List<bool>>();
uiState = new List<List<CellState>>();
for (int iy = 0; iy != rows; iy++) {
cells.add(new List<bool>());
uiState.add(new List<CellState>());
for (int ix = 0; ix != cols; ix++) {
cells[iy].add(false);
uiState[iy].add(CellState.covered);
}
}
// Place the mines.
Random random = new Random();
int cellsRemaining = rows * cols;
int minesRemaining = totalMineCount;
for (int x = 0; x < cols; x += 1) {
for (int y = 0; y < rows; y += 1) {
if (random.nextInt(cellsRemaining) < minesRemaining) {
cells[y][x] = true;
minesRemaining -= 1;
if (minesRemaining <= 0)
return;
}
cellsRemaining -= 1;
}
}
assert(false);
}
PointerEventListener _pointerDownHandlerFor(int posX, int posY) {
return (sky.PointerEvent event) {
if (event.buttons == 1) {
probe(posX, posY);
} else if (event.buttons == 2) {
flag(posX, posY);
}
};
}
Widget buildBoard() {
bool hasCoveredCell = false;
List<Flex> flexRows = <Flex>[];
for (int iy = 0; iy != 9; iy++) {
List<Widget> row = <Widget>[];
for (int ix = 0; ix != 9; ix++) {
CellState state = uiState[iy][ix];
int count = mineCount(ix, iy);
if (!alive) {
if (state != CellState.exploded)
state = cells[iy][ix] ? CellState.shown : state;
}
if (state == CellState.covered) {
row.add(new Listener(
onPointerDown: _pointerDownHandlerFor(ix, iy),
onGestureTap: (_) {
probe(ix, iy);
},
onGestureLongPress: (_) {
activity.userFeedback.performHapticFeedback(activity.HapticFeedbackType_LONG_PRESS);
flag(ix, iy);
},
child: new CoveredMineNode(
flagged: false,
posX: ix,
posY: iy
)
));
// Mutating |hasCoveredCell| here is hacky, but convenient, same
// goes for mutating |hasWon| below.
hasCoveredCell = true;
} else if (state == CellState.flagged) {
row.add(new CoveredMineNode(
flagged: true,
posX: ix,
posY: iy
));
} else {
row.add(new ExposedMineNode(
state: state,
count: count
));
}
}
flexRows.add(
new Flex(
row,
direction: FlexDirection.horizontal,
justifyContent: FlexJustifyContent.center,
key: new Key.stringify(iy)
)
);
}
if (!hasCoveredCell) {
// all cells uncovered. Are all mines flagged?
if ((detectedCount == totalMineCount) && alive) {
hasWon = true;
}
}
return new Container(
padding: new EdgeDims.all(10.0),
margin: new EdgeDims.all(10.0),
decoration: new BoxDecoration(backgroundColor: const Color(0xFF6B6B6B)),
child: new Flex(
flexRows,
direction: FlexDirection.vertical
)
);
}
Widget buildToolBar() {
String toolbarCaption = hasWon ?
'Awesome!!' : alive ?
'Mine Digger [$detectedCount-$totalMineCount]': 'Kaboom! [press here]';
return new ToolBar(
// FIXME: Strange to have the toolbar be tapable.
center: new Listener(
onPointerDown: handleToolbarPointerDown,
child: new Text(toolbarCaption, style: Theme.of(this).text.title)
)
);
}
Widget build() {
// We build the board before we build the toolbar because we compute the win state during build step.
Widget board = buildBoard();
return new TaskDescription(
label: 'Mine Digger',
child: new Scaffold(
toolbar: buildToolBar(),
body: new Container(
child: new Center(child: board),
decoration: new BoxDecoration(backgroundColor: colors.Grey[50])
)
)
);
}
EventDisposition handleToolbarPointerDown(sky.PointerEvent event) {
setState(() {
resetGame();
});
return EventDisposition.processed;
}
// User action. The user uncovers the cell which can cause losing the game.
void probe(int x, int y) {
if (!alive)
return;
if (uiState[y][x] == CellState.flagged)
return;
setState(() {
// Allowed to probe.
if (cells[y][x]) {
// Probed on a mine --> dead!!
uiState[y][x] = CellState.exploded;
alive = false;
} else {
// No mine, uncover nearby if possible.
cull(x, y);
}
});
}
// User action. The user is sure a mine is at this location.
void flag(int x, int y) {
setState(() {
if (uiState[y][x] == CellState.flagged) {
uiState[y][x] = CellState.covered;
--detectedCount;
} else {
uiState[y][x] = CellState.flagged;
++detectedCount;
}
});
}
// Recursively uncovers cells whose totalMineCount is zero.
void cull(int x, int y) {
if ((x < 0) || (x > rows - 1))
return;
if ((y < 0) || (y > cols - 1))
return;
if (uiState[y][x] == CellState.cleared)
return;
uiState[y][x] = CellState.cleared;
if (mineCount(x, y) > 0)
return;
cull(x - 1, y);
cull(x + 1, y);
cull(x, y - 1);
cull(x, y + 1 );
cull(x - 1, y - 1);
cull(x + 1, y + 1);
cull(x + 1, y - 1);
cull(x - 1, y + 1);
}
int mineCount(int x, int y) {
int count = 0;
int my = cols - 1;
int mx = rows - 1;
count += x > 0 ? bombs(x - 1, y) : 0;
count += x < mx ? bombs(x + 1, y) : 0;
count += y > 0 ? bombs(x, y - 1) : 0;
count += y < my ? bombs(x, y + 1 ) : 0;
count += (x > 0) && (y > 0) ? bombs(x - 1, y - 1) : 0;
count += (x < mx) && (y < my) ? bombs(x + 1, y + 1) : 0;
count += (x < mx) && (y > 0) ? bombs(x + 1, y - 1) : 0;
count += (x > 0) && (y < my) ? bombs(x - 1, y + 1) : 0;
return count;
}
int bombs(int x, int y) {
return cells[y][x] ? 1 : 0;
}
}
Widget buildCell(Widget child) {
return new Container(
padding: new EdgeDims.all(1.0),
height: 27.0, width: 27.0,
decoration: new BoxDecoration(backgroundColor: const Color(0xFFC0C0C0)),
margin: new EdgeDims.all(2.0),
child: child
);
}
Widget buildInnerCell(Widget child) {
return new Container(
padding: new EdgeDims.all(1.0),
margin: new EdgeDims.all(3.0),
height: 17.0, width: 17.0,
child: child
);
}
class CoveredMineNode extends Component {
CoveredMineNode({ this.flagged, this.posX, this.posY });
final bool flagged;
final int posX;
final int posY;
Widget build() {
Widget text;
if (flagged)
text = buildInnerCell(new StyledText(elements : [textStyles[5], '\u2691']));
Container inner = new Container(
margin: new EdgeDims.all(2.0),
height: 17.0, width: 17.0,
decoration: new BoxDecoration(backgroundColor: const Color(0xFFD9D9D9)),
child: text
);
return buildCell(inner);
}
}
class ExposedMineNode extends Component {
ExposedMineNode({ this.state, this.count });
final CellState state;
final int count;
Widget build() {
StyledText text;
if (state == CellState.cleared) {
// Uncovered cell with nearby mine count.
if (count != 0)
text = new StyledText(elements : [textStyles[count], '$count']);
} else {
// Exploded mine or shown mine for 'game over'.
int color = state == CellState.exploded ? 3 : 0;
text = new StyledText(elements : [textStyles[color], '\u2600']);
}
return buildCell(buildInnerCell(text));
}
}
void main() {
runApp(new MineDiggerApp());
}