420 行
13 KiB
JavaScript
420 行
13 KiB
JavaScript
// Copyright 2016 David Galles, University of San Francisco. All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without modification, are
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// 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 list of
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// conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright notice, this list
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// of conditions and the following disclaimer in the documentation and/or other materials
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// provided with the distribution.
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//
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// THIS SOFTWARE IS PROVIDED BY David Galles ``AS IS'' AND ANY EXPRESS OR IMPLIED
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// WARRANTIES, INCLUDING, BUT NOT LIIBTED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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// FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> OR
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// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// CONSEQUENTIAL 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 CAUSED AND ON
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// ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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// The views and conclusions contained in the software and documentation are those of the
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// authors and should not be interpreted as representing official policies, either expressed
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// or implied, of the University of San Francisco
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// Constants.
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Ternary.NODE_WIDTH = 30;
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Ternary.LINK_COLOR = "#007700";
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Ternary.HIGHLIGHT_CIRCLE_COLOR = "#007700";
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Ternary.FOREGROUND_COLOR = "#007700";
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Ternary.BACKGROUND_COLOR = "#CCFFCC";
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Ternary.TRUE_COLOR = "#CCFFCC";
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Ternary.PRINT_COLOR = Ternary.FOREGROUND_COLOR;
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Ternary.FALSE_COLOR = "#FFFFFF"
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Ternary.WIDTH_DELTA = 50;
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Ternary.HEIGHT_DELTA = 50;
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Ternary.STARTING_Y = 80;
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Ternary.LeftMargin = 300;
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Ternary.NEW_NODE_Y = 100
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Ternary.NEW_NODE_X = 50;
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Ternary.FIRST_PRINT_POS_X = 50;
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Ternary.PRINT_VERTICAL_GAP = 20;
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Ternary.PRINT_HORIZONTAL_GAP = 50;
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function Ternary(am, w, h)
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{
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this.init(am, w, h);
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}
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Ternary.prototype = new Algorithm();
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Ternary.prototype.constructor = Ternary;
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Ternary.superclass = Algorithm.prototype;
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Ternary.prototype.init = function(am, w, h)
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{
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var sc = Ternary.superclass;
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this.startingX = w / 2;
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this.first_print_pos_y = h - 2 * Ternary.PRINT_VERTICAL_GAP;
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this.print_max = w - 10;
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var fn = sc.init;
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fn.call(this,am);
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this.addControls();
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this.nextIndex = 0;
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this.commands = [];
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this.cmd("CreateLabel", 0, "", 20, 10, 0);
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this.cmd("CreateLabel", 1, "", 20, 10, 0);
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this.cmd("CreateLabel", 2, "", 20, 30, 0);
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this.nextIndex = 3;
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this.animationManager.StartNewAnimation(this.commands);
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this.animationManager.skipForward();
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this.animationManager.clearHistory();
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}
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Ternary.prototype.addControls = function()
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{
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this.insertField = addControlToAlgorithmBar("Text", "");
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this.insertField.onkeypress = this.returnSubmit(this.insertField, this.insertCallback.bind(this), 12,false);
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this.insertButton = addControlToAlgorithmBar("Button", "添加");
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this.insertButton.onclick = this.insertCallback.bind(this);
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// this.deleteField = addControlToAlgorithmBar("Text", "");
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// this.deleteField.onkeydown = this.returnSubmit(this.deleteField, this.deleteCallback.bind(this), 12);
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// this.deleteButton = addControlToAlgorithmBar("Button", "删除");
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// this.deleteButton.onclick = this.deleteCallback.bind(this);
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this.findField = addControlToAlgorithmBar("Text", "");
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this.findField.onkeydown = this.returnSubmit(this.findField, this.findCallback.bind(this), 12);
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this.findButton = addControlToAlgorithmBar("Button", "搜索");
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this.findButton.onclick = this.findCallback.bind(this);
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// this.printButton = addControlToAlgorithmBar("Button", "打印");
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// this.printButton.onclick = this.printCallback.bind(this);
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}
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Ternary.prototype.reset = function()
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{
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this.nextIndex = 3;
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this.treeRoot = null;
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}
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Ternary.prototype.insertCallback = function(event)
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{
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var insertedValue = this.insertField.value.toUpperCase()
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insertedValue = insertedValue.replace(/[^a-z]/gi,'');
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if (insertedValue != "")
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{
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// set text value
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this.insertField.value = "";
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this.implementAction(this.add.bind(this), insertedValue);
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}
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}
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Ternary.prototype.printCallback = function(event)
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{
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this.implementAction(this.printTree.bind(this),"");
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}
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Ternary.prototype.findCallback = function(event)
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{
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var findValue = this.findField.value.toUpperCase()
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finndValue = findValue.replace(/[^a-z]/gi,'');
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this.findField.value = "";
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this.implementAction(this.findElement.bind(this),findValue);
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}
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Ternary.prototype.findElement = function(word)
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{
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this.commands = [];
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this.commands = new Array();
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this.cmd("SetText", 0, "正在搜索： ");
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this.cmd("SetText", 1, "\"" + word + "\"");
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this.cmd("AlignRight", 1, 0);
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this.cmd("Step");
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var node = this.doFind(this.root, word);
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if (node != null)
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{
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this.cmd("SetText", 0, "Found \""+word+"\"");
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}
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else
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{
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this.cmd("SetText", 0, "\""+word+"\" not Found");
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}
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this.cmd("SetText", 1, "");
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this.cmd("SetText", 2, "");
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return this.commands;
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}
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Ternary.prototype.doFind = function(tree, s)
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{
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if (tree == null)
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{
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return null;
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}
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this.cmd("SetHighlight", tree.graphicID , 1);
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if (s.length == 0)
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{
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if (tree.isword == true)
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{
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this.cmd("SetText", 2, "Reached the end of the string \nCurrent node is True\nWord is in the tree");
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this.cmd("Step");
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this.cmd("SetHighlight", tree.graphicID , 0);
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return tree
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}
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else
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{
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this.cmd("SetText", 2, "Reached the end of the string \nCurrent node is False\nWord is Not the tree");
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this.cmd("Step");
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this.cmd("SetHighlight", tree.graphicID , 0);
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return null
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}
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}
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else
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{
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this.cmd("SetHighlightIndex", 1, 1);
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var index = s.charCodeAt(0) - "A".charCodeAt(0);
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if (tree.children[index] == null)
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{
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this.cmd("SetText", 2, "Child " + s.charAt(0) + " does not exist\nWord is Not the tree");
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this.cmd("Step");
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this.cmd("SetHighlight", tree.graphicID , 0);
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return null
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}
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this.cmd("CreateHighlightCircle", this.highlightID, Ternary.HIGHLIGHT_CIRCLE_COLOR, tree.x, tree.y);
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this.cmd("SetWidth", this.highlightID, Ternary.NODE_WIDTH);
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this.cmd("SetText", 2, "Making recursive call to " + s.charAt(0) + " child, passing in " + s.substring(1));
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this.cmd("Step")
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this.cmd("SetHighlight", tree.graphicID , 0);
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this.cmd("SetHighlightIndex", 1, -1);
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this.cmd("SetText", 1, "\"" + s.substring(1) + "\"");
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this.cmd("Move", this.highlightID, tree.children[index].x, tree.children[index].y);
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this.cmd("Step")
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this.cmd("Delete", this.highlightID);
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return this.doFind(tree.children[index], s.substring(1))
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}
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}
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Ternary.prototype.insertElement = function(insertedValue)
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{
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this.cmd("SetText", 0, "");
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return this.commands;
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}
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Ternary.prototype.insert = function(elem, tree)
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{
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}
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Ternary.prototype.resizeTree = function()
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{
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this.resizeWidths(this.root);
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if (this.root != null)
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{
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var startingPoint = this.root.width / 2 + 1 + Ternary.LeftMargin;
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this.setNewPositions(this.root, startingPoint, Ternary.STARTING_Y);
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this.animateNewPositions(this.root);
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this.cmd("Step");
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}
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}
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Ternary.prototype.add = function(word)
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{
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this.commands = new Array();
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this.cmd("SetText", 0, "Inserting; ");
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this.cmd("SetText", 1, "\"" + word + "\"");
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this.cmd("AlignRight", 1, 0);
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this.cmd("Step");
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if (this.root == null)
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{
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this.cmd("CreateCircle", this.nextIndex, "", Ternary.NEW_NODE_X, Ternary.NEW_NODE_Y);
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this.cmd("SetForegroundColor", this.nextIndex, Ternary.FOREGROUND_COLOR);
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this.cmd("SetBackgroundColor", this.nextIndex, Ternary.FALSE_COLOR);
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this.cmd("SetWidth", this.nextIndex, Ternary.NODE_WIDTH);
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this.cmd("SetText", 2, "Creating a new root");
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this.root = new TernaryNode("", this.nextIndex, Ternary.NEW_NODE_X, Ternary.NEW_NODE_Y)
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this.cmd("Step");
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this.resizeTree();
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this.cmd("SetText", 2, "" );
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this.highlightID = this.nextIndex++;
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this.nextIndex += 1;
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}
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this.addR(word.toUpperCase(), this.root);
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this.cmd("SetText", 0, "");
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this.cmd("SetText", 1, "");
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this.cmd("SetText", 2, "");
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return this.commands;
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}
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Ternary.prototype.addR = function(s, tree)
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{
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this.cmd("SetHighlight", tree.graphicID , 1);
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if (s.length == 0)
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{
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this.cmd("SetText", 2, "Reached the end of the string \nSet current node to true");
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this.cmd("Step");
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// this.cmd("SetText", tree.graphicID, "T");
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this.cmd("SetBackgroundColor", tree.graphicID, Ternary.TRUE_COLOR);
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this.cmd("SetHighlight", tree.graphicID , 0);
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tree.isword = true;
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return;
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}
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else
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{
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this.cmd("SetHighlightIndex", 1, 1);
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var index = s.charCodeAt(0) - "A".charCodeAt(0);
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if (tree.children[index] == null)
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{
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this.cmd("CreateCircle", this.nextIndex, s.charAt(0), Ternary.NEW_NODE_X, Ternary.NEW_NODE_Y);
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this.cmd("SetForegroundColor", this.nextIndex, Ternary.FOREGROUND_COLOR);
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this.cmd("SetBackgroundColor", this.nextIndex, Ternary.FALSE_COLOR);
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this.cmd("SetWidth", this.nextIndex, Ternary.NODE_WIDTH);
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this.cmd("SetText", 2, "Child " + s.charAt(0) + " does not exist. Creating ... ");
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tree.children[index] = new TernaryNode(s.charAt(0), this.nextIndex, Ternary.NEW_NODE_X, Ternary.NEW_NODE_Y)
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tree.children[index].parent = tree;
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this.cmd("Connect", tree.graphicID, tree.children[index].graphicID, Ternary.FOREGROUND_COLOR, 0, false, s.charAt(0));
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this.cmd("Step");
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this.resizeTree();
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this.cmd("SetText", 2, "" );
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this.nextIndex += 1;
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this.highlightID = this.nextIndex++;
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}
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this.cmd("CreateHighlightCircle", this.highlightID, Ternary.HIGHLIGHT_CIRCLE_COLOR, tree.x, tree.y);
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this.cmd("SetWidth", this.highlightID, Ternary.NODE_WIDTH);
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this.cmd("SetText", 2, "Making recursive call to " + s.charAt(0) + " child, passing in \"" + s.substring(1) + "\"");
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this.cmd("Step")
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this.cmd("SetHighlight", tree.graphicID , 0);
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this.cmd("SetHighlightIndex", 1, -1);
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this.cmd("SetText", 1, "\"" + s.substring(1) + "\"");
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this.cmd("Move", this.highlightID, tree.children[index].x, tree.children[index].y);
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this.cmd("Step")
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this.cmd("Delete", this.highlightID);
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this.addR(s.substring(1), tree.children[index])
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}
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}
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Ternary.prototype.setNewPositions = function(tree, xPosition, yPosition)
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{
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if (tree != null)
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{
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tree.x = xPosition;
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tree.y = yPosition;
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var newX = xPosition - tree.width / 2;
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var newY = yPosition + Ternary.HEIGHT_DELTA;
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for (var i = 0; i < 26; i++)
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{
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if (tree.children[i] != null)
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{
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this.setNewPositions(tree.children[i], newX + tree.children[i].width / 2, newY);
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newX = newX + tree.children[i].width;
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}
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}
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}
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}
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Ternary.prototype.animateNewPositions = function(tree)
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{
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if (tree != null)
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{
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this.cmd("Move", tree.graphicID, tree.x, tree.y);
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for (var i = 0; i < 26; i++)
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{
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this.animateNewPositions(tree.children[i])
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}
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}
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}
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Ternary.prototype.resizeWidths = function(tree)
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{
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if (tree == null)
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{
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return 0;
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}
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tree.leftWidth = (this.resizeWidths(tree.left));
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tree.centerWidth = (this.resizeWidths(tree.center));
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tree.rightWidth = (this.resizeWidths(tree.right));
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tree.width = Math.max(size, Ternary.NODE_WIDTH + 4)
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return tree.width;
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}
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function TernaryNode(val, id, initialX, initialY)
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{
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this.wordRemainder = val;
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this.x = initialX;
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this.y = initialY;
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this.graphicID = id;
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this.left = null;
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this.center = null;
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this.right = null;
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this.leftWidth = 0;
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this.centerWidth = 0;
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this.rightWwidth = 0;
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this.parent = null;
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}
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Ternary.prototype.disableUI = function(event)
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{
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this.insertField.disabled = true;
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this.insertButton.disabled = true;
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this.deleteField.disabled = true;
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this.deleteButton.disabled = true;
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this.findField.disabled = true;
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this.findButton.disabled = true;
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// this.printButton.disabled = true;
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}
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Ternary.prototype.enableUI = function(event)
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{
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this.insertField.disabled = false;
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this.insertButton.disabled = false;
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this.deleteField.disabled = false;
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this.deleteButton.disabled = false;
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this.findField.disabled = false;
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this.findButton.disabled = false;
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// this.printButton.disabled = false;
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}
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var currentAlg;
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function init()
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{
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var animManag = initCanvas();
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currentAlg = new Ternary(animManag, canvas.width, canvas.height);
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}
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