Conner's Global Science Blog

Tuesday, November 8, 2011

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Posted by Conner Berthold at 10:30 AM

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Tetris

/* * PROJECT: JsTetris * VERSION: 1.19 * LICENSE: BSD (revised) * AUTHOR: (c) 2004-2009 Cezary Tomczak * LINK: http://www.gosu.pl/tetris/ * * This script can be used freely as long as all * copyright messages are intact. */ /** * Tetris Game * Initializes the buttons automatically, no additional actions required * * Score: * 1) puzzle speed = 80+700/level * 2) if puzzles created in current level >= 10+level*2 then increase level * 3) after puzzle falling score is increased by 1000*level*linesRemoved * 4) each down action increases score by 5+level * * API: * * public - method can be called outside of the object * event - method is used as event, "this" refers to html object, "self" refers to javascript object * * class Tetris * ------------ * public event void start() * public event void reset() * public event void pause() * public event void gameOver() * public event void up() * public event void down() * public event void left() * public event void right() * public event void space() * * class Window * ------------ * event void activate() * event void close() * public bool isActive() * * class Keyboard * -------------- * public void set(int key, function func) * event void event(object e) * * class Stats * ----------- * public void start() * public void stop() * public void reset() * public event void incTime() * public void setScore(int i) * public void setLevel(int i) * public void setLines(int i) * public void setPuzzles(int i) * public void setActions(int i) * public int getScore() * public int getLevel() * public int getLines() * public int getPuzzles() * public int getActions() * * class Area * ---------- * public Constructor(int unit, int x, int y, string id) * public void destroy() * public int removeFullLines() * public bool isLineFull(int y) * public void removeLine(int y) * public mixed getBlock(int y, int x) * public void addElement(htmlObject el) * * class Puzzle * ------------ * public Constructor(object area) * public void reset() * public bool isRunning() * public bool isStopped() * public int getX() * public int getY() * public bool mayPlace() * public void place() * public void destroy() * private array createEmptyPuzzle(int y, int x) * event void fallDown() * public event void forceMoveDown() * public void stop() * public bool mayRotate() * public void rotate() * public bool mayMoveDown() * public void moveDown() * public bool mayMoveLeft() * public void moveLeft() * public bool mayMoveRight() * public void moveRight() * * class Highscores * ---------------- * public Constructor(maxscores) * public void load() * public void save() * public bool mayAdd(int score) * public void add(string name, int score) * public array getScores() * public string toHtml() * private void sort() * * class Cookie * ------------ * public string get(string name) * public void set(string name, string value, int seconds, string path, string domain, bool secure) * public void del(string name) * * TODO: * document.getElementById("tetris-nextpuzzle") cache ? * */ function Tetris() { var self = this; this.stats = new Stats(); this.puzzle = null; this.area = null; this.unit = 20; // unit = x pixels this.areaX = 20; // area width = x units this.areaY = 20; // area height = y units this.highscores = new Highscores(10); this.paused = false; /** * @return void * @access public event */ this.start = function() { if (self.puzzle && !confirm('Are you sure you want to start a new game ?')) return; self.reset(); self.stats.start(); document.getElementById("tetris-nextpuzzle").style.display = "block"; document.getElementById("tetris-keys").style.display = "none"; self.area = new Area(self.unit, self.areaX, self.areaY, "tetris-area"); self.puzzle = new Puzzle(self, self.area); if (self.puzzle.mayPlace()) { self.puzzle.place(); } else { self.gameOver(); } }; /** * @return void * @access public event */ this.reset = function() { if (self.puzzle) { self.puzzle.destroy(); self.puzzle = null; } if (self.area) { self.area.destroy(); self.area = null; } document.getElementById("tetris-gameover").style.display = "none"; document.getElementById("tetris-nextpuzzle").style.display = "none"; document.getElementById("tetris-keys").style.display = "block"; self.stats.reset(); self.paused = false; document.getElementById('tetris-pause').style.display = 'block'; document.getElementById('tetris-resume').style.display = 'none'; }; /** * Pause / Resume. * @return void * @access public event */ this.pause = function() { if (self.puzzle == null) return; if (self.paused) { self.puzzle.running = true; self.puzzle.fallDownID = setTimeout(self.puzzle.fallDown, self.puzzle.speed); document.getElementById('tetris-pause').style.display = 'block'; document.getElementById('tetris-resume').style.display = 'none'; self.stats.timerId = setInterval(self.stats.incTime, 1000); self.paused = false; } else { if (!self.puzzle.isRunning()) return; if (self.puzzle.fallDownID) clearTimeout(self.puzzle.fallDownID); document.getElementById('tetris-pause').style.display = 'none'; document.getElementById('tetris-resume').style.display = 'block'; clearTimeout(self.stats.timerId); self.paused = true; self.puzzle.running = false; } }; /** * End game. * Stop stats, ... * @return void * @access public event */ this.gameOver = function() { self.stats.stop(); self.puzzle.stop(); document.getElementById("tetris-nextpuzzle").style.display = "none"; document.getElementById("tetris-gameover").style.display = "block"; if (this.highscores.mayAdd(this.stats.getScore())) { var name = prompt("Game Over !\nEnter your name:", ""); if (name && name.trim().length) { this.highscores.add(name, this.stats.getScore()); } } }; /** * @return void * @access public event */ this.up = function() { if (self.puzzle && self.puzzle.isRunning() && !self.puzzle.isStopped()) { if (self.puzzle.mayRotate()) { self.puzzle.rotate(); self.stats.setActions(self.stats.getActions() + 1); } } }; /** * @return void * @access public event */ this.down = function() { if (self.puzzle && self.puzzle.isRunning() && !self.puzzle.isStopped()) { if (self.puzzle.mayMoveDown()) { self.stats.setScore(self.stats.getScore() + 5 + self.stats.getLevel()); self.puzzle.moveDown(); self.stats.setActions(self.stats.getActions() + 1); } } }; /** * @return void * @access public event */ this.left = function() { if (self.puzzle && self.puzzle.isRunning() && !self.puzzle.isStopped()) { if (self.puzzle.mayMoveLeft()) { self.puzzle.moveLeft(); self.stats.setActions(self.stats.getActions() + 1); } } }; /** * @return void * @access public event */ this.right = function() { if (self.puzzle && self.puzzle.isRunning() && !self.puzzle.isStopped()) { if (self.puzzle.mayMoveRight()) { self.puzzle.moveRight(); self.stats.setActions(self.stats.getActions() + 1); } } }; /** * @return void * @access public event */ this.space = function() { if (self.puzzle && self.puzzle.isRunning() && !self.puzzle.isStopped()) { self.puzzle.stop(); self.puzzle.forceMoveDown(); } }; // windows var helpwindow = new Window("tetris-help"); var highscores = new Window("tetris-highscores"); // game menu document.getElementById("tetris-menu-start").onclick = function() { helpwindow.close(); highscores.close(); self.start(); this.blur(); }; // document.getElementById("tetris-menu-reset").onclick = function() { helpwindow.close(); highscores.close(); self.reset(); this.blur(); }; document.getElementById("tetris-menu-pause").onclick = function() { self.pause(); this.blur(); }; document.getElementById("tetris-menu-resume").onclick = function() { self.pause(); this.blur(); }; // help document.getElementById("tetris-menu-help").onclick = function() { highscores.close(); helpwindow.activate(); this.blur(); }; document.getElementById("tetris-help-close").onclick = helpwindow.close; // highscores document.getElementById("tetris-menu-highscores").onclick = function() { helpwindow.close(); document.getElementById("tetris-highscores-content").innerHTML = self.highscores.toHtml(); highscores.activate(); this.blur(); }; document.getElementById("tetris-highscores-close").onclick = highscores.close; // keyboard - buttons //document.getElementById("tetris-keyboard-up").onclick = function() { self.up(); this.blur(); }; //document.getElementById("tetris-keyboard-down").onclick = function() { self.down(); this.blur(); }; //document.getElementById("tetris-keyboard-left").onclick = function () { self.left(); this.blur(); }; //document.getElementById("tetris-keyboard-right").onclick = function() { self.right(); this.blur(); }; // keyboard var keyboard = new Keyboard(); keyboard.set(keyboard.n, this.start); //keyboard.set(keyboard.r, this.reset); keyboard.set(keyboard.p, this.pause); keyboard.set(keyboard.up, this.up); keyboard.set(keyboard.down, this.down); keyboard.set(keyboard.left, this.left); keyboard.set(keyboard.right, this.right); keyboard.set(keyboard.space, this.space); document.onkeydown = keyboard.event; /** * Window replaces game area, for example help window * @param string id */ function Window(id) { this.id = id; this.el = document.getElementById(this.id); var self = this; /** * Activate or deactivate a window - update html * @return void * @access event */ this.activate = function() { self.el.style.display = (self.el.style.display == "block" ? "none" : "block"); }; /** * Close window - update html * @return void * @access event */ this.close = function() { self.el.style.display = "none"; }; /** * @return bool * @access public */ this.isActive = function() { return (self.el.style.display == "block"); }; } /** * Assigning functions to keyboard events * When key is pressed, searching in a table if any function has been assigned to this key, execute the function. */ function Keyboard() { this.up = 38; this.down = 40; this.left = 37; this.right = 39; this.n = 78; this.p = 80; this.r = 82; this.space = 32; this.f12 = 123; this.escape = 27; this.keys = []; this.funcs = []; var self = this; /** * @param int key * @param function func * @return void * @access public */ this.set = function(key, func) { this.keys.push(key); this.funcs.push(func); }; /** * @param object e * @return void * @access event */ this.event = function(e) { if (!e) { e = window.event; } for (var i = 0; i < self.keys.length; i++) { if (e.keyCode == self.keys[i]) { self.funcs[i](); } } }; } /** * Live game statistics * Updating html */ function Stats() { this.level; this.time; this.apm; this.lines; this.score; this.puzzles; // number of puzzles created on current level this.actions; this.el = { "level": document.getElementById("tetris-stats-level"), "time": document.getElementById("tetris-stats-time"), "apm": document.getElementById("tetris-stats-apm"), "lines": document.getElementById("tetris-stats-lines"), "score": document.getElementById("tetris-stats-score") } this.timerId = null; var self = this; /** * Start counting statistics, reset stats, turn on the timer * @return void * @access public */ this.start = function() { this.reset(); this.timerId = setInterval(this.incTime, 1000); }; /** * Stop counting statistics, turn off the timer * @return void * @access public */ this.stop = function() { if (this.timerId) { clearInterval(this.timerId); } }; /** * Reset statistics - update html * @return void * @access public */ this.reset = function() { this.stop(); this.level = 1; this.time = 0; this.apm = 0; this.lines = 0; this.score = 0; this.puzzles = 0; this.actions = 0; this.el.level.innerHTML = this.level; this.el.time.innerHTML = this.time; this.el.apm.innerHTML = this.apm; this.el.lines.innerHTML = this.lines; this.el.score.innerHTML = this.score; }; /** * Increase time, update apm - update html * This func is called by setInterval() * @return void * @access public event */ this.incTime = function() { self.time++; self.el.time.innerHTML = self.time; self.apm = parseInt((self.actions / self.time) * 60); self.el.apm.innerHTML = self.apm; }; /** * Set score - update html * @param int i * @return void * @access public */ this.setScore = function(i) { this.score = i; this.el.score.innerHTML = this.score; }; /** * Set level - update html * @param int i * @return void * @access public */ this.setLevel = function(i) { this.level = i; this.el.level.innerHTML = this.level; }; /** * Set lines - update html * @param int i * @return void * @access public */ this.setLines = function(i) { this.lines = i; this.el.lines.innerHTML = this.lines; }; /** * Number of puzzles created on current level * @param int i * @return void * @access public */ this.setPuzzles = function(i) { this.puzzles = i; }; /** * @param int i * @return void * @access public */ this.setActions = function(i) { this.actions = i; }; /** * @return int * @access public */ this.getScore = function() { return this.score; }; /** * @return int * @access public */ this.getLevel = function() { return this.level; }; /** * @return int * @access public */ this.getLines = function() { return this.lines; }; /** * Number of puzzles created on current level * @return int * @access public */ this.getPuzzles = function() { return this.puzzles; }; /** * @return int * @access public */ this.getActions = function() { return this.actions; }; } /** * Area consists of blocks (2 dimensional board). * Block contains "0" (if empty) or Html Object. * @param int x * @param int y * @param string id */ function Area(unit, x, y, id) { this.unit = unit; this.x = x; this.y = y; this.el = document.getElementById(id); this.board = []; // create 2-dimensional board for (var y = 0; y < this.y; y++) { this.board.push(new Array()); for (var x = 0; x < this.x; x++) { this.board[y].push(0); } } /** * Removing html elements from area. * @return void * @access public */ this.destroy = function() { for (var y = 0; y < this.board.length; y++) { for (var x = 0; x < this.board[y].length; x++) { if (this.board[y][x]) { this.el.removeChild(this.board[y][x]); this.board[y][x] = 0; } } } }; /** * Searching for full lines. * Must go from the bottom of area to the top. * Returns the number of lines removed - needed for Stats.score. * @see isLineFull() removeLine() * @return void * @access public */ this.removeFullLines = function() { var lines = 0; for (var y = this.y - 1; y > 0; y--) { if (this.isLineFull(y)) { this.removeLine(y); lines++; y++; } } return lines; }; /** * @param int y * @return bool * @access public */ this.isLineFull = function(y) { for (var x = 0; x < this.x; x++) { if (!this.board[y][x]) { return false; } } return true; }; /** * Remove given line * Remove html objects * All lines that are above given line move down by 1 unit * @param int y * @return void * @access public */ this.removeLine = function(y) { for (var x = 0; x < this.x; x++) { this.el.removeChild(this.board[y][x]); this.board[y][x] = 0; } y--; for (; y > 0; y--) { for (var x = 0; x < this.x; x++) { if (this.board[y][x]) { var el = this.board[y][x]; el.style.top = el.offsetTop + this.unit + "px"; this.board[y+1][x] = el; this.board[y][x] = 0; } } } }; /** * @param int y * @param int x * @return mixed 0 or Html Object * @access public */ this.getBlock = function(y, x) { if (y < 0) { return 0; } if (y < this.y && x < this.x) { return this.board[y][x]; } else { throw "Area.getBlock("+y+", "+x+") failed"; } }; /** * Add Html Element to the area. * Find (x,y) position using offsetTop and offsetLeft * @param object el * @return void * @access public */ this.addElement = function(el) { var x = parseInt(el.offsetLeft / this.unit); var y = parseInt(el.offsetTop / this.unit); if (y >= 0 && y < this.y && x >= 0 && x < this.x) { this.board[y][x] = el; } else { // not always an error .. } }; } /** * Puzzle consists of blocks. * Each puzzle after rotating 4 times, returns to its primitive position. */ function Puzzle(tetris, area) { var self = this; this.tetris = tetris; this.area = area; // timeout ids this.fallDownID = null; this.forceMoveDownID = null; this.type = null; // 0..6 this.nextType = null; // next puzzle this.position = null; // 0..3 this.speed = null; this.running = null; this.stopped = null; this.board = []; // filled with html elements after placing on area this.elements = []; this.nextElements = []; // next board elements // (x,y) position of the puzzle (top-left) this.x = null; this.y = null; // width & height must be the same this.puzzles = [ [ [0,0,1], [1,1,1], [0,0,0] ], [ [1,0,0], [1,1,1], [0,0,0] ], [ [0,1,1], [1,1,0], [0,0,0] ], [ [1,1,0], [0,1,1], [0,0,0] ], [ [0,1,0], [1,1,1], [0,0,0] ], [ [1,1], [1,1] ], [ [0,0,0,0], [1,1,1,1], [0,0,0,0], [0,0,0,0] ] ]; /** * Reset puzzle. It does not destroy html elements in this.board. * @return void * @access public */ this.reset = function() { if (this.fallDownID) { clearTimeout(this.fallDownID); } if (this.forceMoveDownID) { clearTimeout(this.forceMoveDownID); } this.type = this.nextType; this.nextType = random(this.puzzles.length); this.position = 0; this.speed = 80 + (700 / this.tetris.stats.getLevel()); this.running = false; this.stopped = false; this.board = []; this.elements = []; for (var i = 0; i < this.nextElements.length; i++) { document.getElementById("tetris-nextpuzzle").removeChild(this.nextElements[i]); } this.nextElements = []; this.x = null; this.y = null; }; this.nextType = random(this.puzzles.length); this.reset(); /** * Check whether puzzle is running. * @return bool * @access public */ this.isRunning = function() { return this.running; }; /** * Check whether puzzle has been stopped by user. It happens when user clicks * "down" when puzzle is already at the bottom of area. The puzzle may still * be running with event fallDown(). When puzzle is stopped, no actions will be * performed when user press a key. * @return bool * @access public */ this.isStopped = function() { return this.stopped; }; /** * Get X position of puzzle (top-left) * @return int * @access public */ this.getX = function() { return this.x; }; /** * Get Y position of puzzle (top-left) * @return int * @access public */ this.getY = function() { return this.y; }; /** * Check whether new puzzle may be placed on the area. * Find (x,y) in area where beginning of the puzzle will be placed. * Check if first puzzle line (checking from the bottom) can be placed on the area. * @return bool * @access public */ this.mayPlace = function() { var puzzle = this.puzzles[this.type]; var areaStartX = parseInt((this.area.x - puzzle[0].length) / 2); var areaStartY = 1; var lineFound = false; var lines = 0; for (var y = puzzle.length - 1; y >= 0; y--) { for (var x = 0; x < puzzle[y].length; x++) { if (puzzle[y][x]) { lineFound = true; if (this.area.getBlock(areaStartY, areaStartX + x)) { return false; } } } if (lineFound) { lines++; } if (areaStartY - lines < 0) { break; } } return true; }; /** * Create empty board, create blocks in area - html objects, update puzzle board. * Check puzzles on current level, increase level if needed. * @return void * @access public */ this.place = function() { // stats this.tetris.stats.setPuzzles(this.tetris.stats.getPuzzles() + 1); if (this.tetris.stats.getPuzzles() >= (10 + this.tetris.stats.getLevel() * 2)) { this.tetris.stats.setLevel(this.tetris.stats.getLevel() + 1); this.tetris.stats.setPuzzles(0); } // init var puzzle = this.puzzles[this.type]; var areaStartX = parseInt((this.area.x - puzzle[0].length) / 2); var areaStartY = 1; var lineFound = false; var lines = 0; this.x = areaStartX; this.y = 1; this.board = this.createEmptyPuzzle(puzzle.length, puzzle[0].length); // create puzzle for (var y = puzzle.length - 1; y >= 0; y--) { for (var x = 0; x < puzzle[y].length; x++) { if (puzzle[y][x]) { lineFound = true; var el = document.createElement("div"); el.className = "block" + this.type; el.style.left = (areaStartX + x) * this.area.unit + "px"; el.style.top = (areaStartY - lines) * this.area.unit + "px"; this.area.el.appendChild(el); this.board[y][x] = el; this.elements.push(el); } } if (lines) { this.y--; } if (lineFound) { lines++; } } this.running = true; this.fallDownID = setTimeout(this.fallDown, this.speed); // next puzzle var nextPuzzle = this.puzzles[this.nextType]; for (var y = 0; y < nextPuzzle.length; y++) { for (var x = 0; x < nextPuzzle[y].length; x++) { if (nextPuzzle[y][x]) { var el = document.createElement("div"); el.className = "block" + this.nextType; el.style.left = (x * this.area.unit) + "px"; el.style.top = (y * this.area.unit) + "px"; document.getElementById("tetris-nextpuzzle").appendChild(el); this.nextElements.push(el); } } } }; /** * Remove puzzle from the area. * Clean some other stuff, see reset() * @return void * @access public */ this.destroy = function() { for (var i = 0; i < this.elements.length; i++) { this.area.el.removeChild(this.elements[i]); } this.elements = []; this.board = []; this.reset(); }; /** * @param int y * @param int x * @return array * @access private */ this.createEmptyPuzzle = function(y, x) { var puzzle = []; for (var y2 = 0; y2 < y; y2++) { puzzle.push(new Array()); for (var x2 = 0; x2 < x; x2++) { puzzle[y2].push(0); } } return puzzle; }; /** * Puzzle fall from the top to the bottom. * After placing a puzzle, this event will be called as long as the puzzle is running. * @see place() stop() * @return void * @access event */ this.fallDown = function() { if (self.isRunning()) { if (self.mayMoveDown()) { self.moveDown(); self.fallDownID = setTimeout(self.fallDown, self.speed); } else { // move blocks into area board for (var i = 0; i < self.elements.length; i++) { self.area.addElement(self.elements[i]); } // stats var lines = self.area.removeFullLines(); if (lines) { self.tetris.stats.setLines(self.tetris.stats.getLines() + lines); self.tetris.stats.setScore(self.tetris.stats.getScore() + (1000 * self.tetris.stats.getLevel() * lines)); } // reset puzzle self.reset(); if (self.mayPlace()) { self.place(); } else { self.tetris.gameOver(); } } } }; /** * After clicking "space" the puzzle is forced to move down, no user action is performed after * this event is called. this.running must be set to false. This func is similiar to fallDown() * Also update score & actions - like Tetris.down() * @see fallDown() * @return void * @access public event */ this.forceMoveDown = function() { if (!self.isRunning() && !self.isStopped()) { if (self.mayMoveDown()) { // stats: score, actions self.tetris.stats.setScore(self.tetris.stats.getScore() + 5 + self.tetris.stats.getLevel()); self.tetris.stats.setActions(self.tetris.stats.getActions() + 1); self.moveDown(); self.forceMoveDownID = setTimeout(self.forceMoveDown, 30); } else { // move blocks into area board for (var i = 0; i < self.elements.length; i++) { self.area.addElement(self.elements[i]); } // stats: lines var lines = self.area.removeFullLines(); if (lines) { self.tetris.stats.setLines(self.tetris.stats.getLines() + lines); self.tetris.stats.setScore(self.tetris.stats.getScore() + (1000 * self.tetris.stats.getLevel() * lines)); } // reset puzzle self.reset(); if (self.mayPlace()) { self.place(); } else { self.tetris.gameOver(); } } } }; /** * Stop the puzzle falling * @return void * @access public */ this.stop = function() { this.running = false; }; /** * Check whether puzzle may be rotated. * Check down, left, right, rotate * @return bool * @access public */ this.mayRotate = function() { for (var y = 0; y < this.board.length; y++) { for (var x = 0; x < this.board[y].length; x++) { if (this.board[y][x]) { var newY = this.getY() + this.board.length - 1 - x; var newX = this.getX() + y; if (newY >= this.area.y) { return false; } if (newX < 0) { return false; } if (newX >= this.area.x) { return false; } if (this.area.getBlock(newY, newX)) { return false; } } } } return true; }; /** * Rotate the puzzle to the left. * @return void * @access public */ this.rotate = function() { var puzzle = this.createEmptyPuzzle(this.board.length, this.board[0].length); for (var y = 0; y < this.board.length; y++) { for (var x = 0; x < this.board[y].length; x++) { if (this.board[y][x]) { var newY = puzzle.length - 1 - x; var newX = y; var el = this.board[y][x]; var moveY = newY - y; var moveX = newX - x; el.style.left = el.offsetLeft + (moveX * this.area.unit) + "px"; el.style.top = el.offsetTop + (moveY * this.area.unit) + "px"; puzzle[newY][newX] = el; } } } this.board = puzzle; }; /** * Check whether puzzle may be moved down. * - is any other puzzle on the way ? * - is it end of the area ? * If false, then true is assigned to variable this.stopped - no user actions will be performed to this puzzle, * so this func should be used carefully, only in Tetris.down() and Tetris.puzzle.fallDown() * @return bool * @access public */ this.mayMoveDown = function() { for (var y = 0; y < this.board.length; y++) { for (var x = 0; x < this.board[y].length; x++) { if (this.board[y][x]) { if (this.getY() + y + 1 >= this.area.y) { this.stopped = true; return false; } if (this.area.getBlock(this.getY() + y + 1, this.getX() + x)) { this.stopped = true; return false; } } } } return true; }; /** * Move the puzzle down by 1 unit. * @return void * @access public */ this.moveDown = function() { for (var i = 0; i < this.elements.length; i++) { this.elements[i].style.top = this.elements[i].offsetTop + this.area.unit + "px"; } this.y++; }; /** * Check whether puzzle may be moved left. * - is any other puzzle on the way ? * - is the end of the area * @return bool * @access public */ this.mayMoveLeft = function() { for (var y = 0; y < this.board.length; y++) { for (var x = 0; x < this.board[y].length; x++) { if (this.board[y][x]) { if (this.getX() + x - 1 < 0) { return false; } if (this.area.getBlock(this.getY() + y, this.getX() + x - 1)) { return false; } } } } return true; }; /** * Move the puzzle left by 1 unit * @return void * @access public */ this.moveLeft = function() { for (var i = 0; i < this.elements.length; i++) { this.elements[i].style.left = this.elements[i].offsetLeft - this.area.unit + "px"; } this.x--; }; /** * Check whether puzle may be moved right. * - is any other puzzle on the way ? * - is the end of the area * @return bool * @access public */ this.mayMoveRight = function() { for (var y = 0; y < this.board.length; y++) { for (var x = 0; x < this.board[y].length; x++) { if (this.board[y][x]) { if (this.getX() + x + 1 >= this.area.x) { return false; } if (this.area.getBlock(this.getY() + y, this.getX() + x + 1)) { return false; } } } } return true; }; /** * Move the puzzle right by 1 unit. * @return void * @access public */ this.moveRight = function() { for (var i = 0; i < this.elements.length; i++) { this.elements[i].style.left = this.elements[i].offsetLeft + this.area.unit + "px"; } this.x++; }; } /** * Generates random number that is >= 0 and < i * @return int * @access private */ function random(i) { return Math.floor(Math.random() * i); } /** * Store highscores in cookie. */ function Highscores(maxscores) { this.maxscores = maxscores; this.scores = []; /** * Load scores from cookie. * Note: it is automatically called when creating new instance of object Highscores. * @return void * @access public */ this.load = function() { var cookie = new Cookie(); var s = cookie.get("tetris-highscores"); this.scores = []; if (s.length) { var scores = s.split("|"); for (var i = 0; i < scores.length; ++i) { var a = scores[i].split(":"); this.scores.push(new Score(a[0], Number(a[1]))); } } }; /** * Save scores to cookie. * Note: it is automatically called after adding new score. * @return void * @access public */ this.save = function() { var cookie = new Cookie(); var a = []; for (var i = 0; i < this.scores.length; ++i) { a.push(this.scores[i].name+":"+this.scores[i].score); } var s = a.join("|"); cookie.set("tetris-highscores", s, 3600*24*1000); }; /** * Is the score high enough to be able to add ? * @return bool * @access public */ this.mayAdd = function(score) { if (this.scores.length < this.maxscores) { return true; } for (var i = this.scores.length - 1; i >= 0; --i) { if (this.scores[i].score < score) { return true; } } return false; }; /** * @param string name * @param int score * @return void * @access public */ this.add = function(name, score) { name = name.replace(/[;=:|]/g, "?"); name = name.replace(//g, ">"); if (this.scores.length < this.maxscores) { this.scores.push(new Score(name, score)); } else { for (var i = this.scores.length - 1; i >= 0; --i) { if (this.scores[i].score < score) { this.scores.removeByIndex(i); this.scores.push(new Score(name, score)); break; } } } this.sort(); this.save(); }; /** * Get array of scores. * @return array [Score, Score, ..] * @access public */ this.getScores = function() { return this.scores; }; /** * All highscores returned in html friendly format. * @return string * @access public */ this.toHtml = function() { var s = ' '; for (var i = 0; i < this.scores.length; ++i) { s += ' '.format(i+1, this.scores[i].name, this.scores[i].score); } s += ' Name Score ?. ? ? '; return s; }; /** * Sort table with scores. * @return void * @access private */ this.sort = function() { var scores = this.scores; var len = scores.length; this.scores = []; for (var i = 0; i < len; ++i) { var el = null, index = null; for (var j = 0; j < scores.length; ++j) { if (!el || (scores[j].score > el.score)) { el = scores[j]; index = j; } } scores.removeByIndex(index); this.scores.push(el); } }; /* Simple score object. */ function Score(name, score) { this.name = name; this.score = score; } this.load(); } /** * Managing cookies. */ function Cookie() { /** * @param string name * @return string * @access public */ this.get = function(name) { var cookies = document.cookie.split(";"); for (var i = 0; i < cookies.length; ++i) { var a = cookies[i].split("="); if (a.length == 2) { a[0] = a[0].trim(); a[1] = a[1].trim(); if (a[0] == name) { return unescape(a[1]); } } } return ""; }; /** * @param string name * @param string value (do not use special chars like ";" "=") * @param int seconds * @param string path * @param string domain * @param bool secure * @return void * @access public */ this.set = function(name, value, seconds, path, domain, secure) { this.del(name); if (!path) path = '/'; var cookie = (name + "=" + escape(value)); if (seconds) { var date = new Date(new Date().getTime()+seconds*1000); cookie += ("; expires="+date.toGMTString()); } cookie += (path ? "; path="+path : ""); cookie += (domain ? "; domain="+domain : ""); cookie += (secure ? "; secure" : ""); document.cookie = cookie; }; /** * @param name * @return void * @access public */ this.del = function(name) { document.cookie = name + "=; expires=Thu, 01-Jan-70 00:00:01 GMT"; }; } } if (!String.prototype.trim) { String.prototype.trim = function() { return this.replace(/^\s*|\s*$/g, ""); }; } if (!Array.prototype.removeByIndex) { Array.prototype.removeByIndex = function(index) { this.splice(index, 1); }; } if (!String.prototype.format) { String.prototype.format = function() { if (!arguments.length) { throw "String.format() failed, no arguments passed, this = "+this; } var tokens = this.split("?"); if (arguments.length != (tokens.length - 1)) { throw "String.format() failed, tokens != arguments, this = "+this; } var s = tokens[0]; for (var i = 0; i < arguments.length; ++i) { s += (arguments[i] + tokens[i + 1]); } return s; }; }

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Tuesday, November 8, 2011

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Tetris