877 行
28 KiB
JavaScript
877 行
28 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.CENTER_LINK_COLOR = "#007700";
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Ternary.SIDE_LINK_COLOR = "#8888AA";
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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 = 20;
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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.root = null;
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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.root = 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.deleteCallback = function(event)
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{
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var deletedValue = this.deleteField.value.toUpperCase();
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deletedValue = deletedValue.replace(/[^a-z]/gi,'');
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if (deletedValue != "")
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{
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this.deleteField.value = "";
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this.implementAction(this.deleteElement.bind(this),deletedValue);
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}
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}
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Ternary.prototype.cleanupAfterDelete = function(tree)
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{
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if (tree == null)
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{
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return;
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}
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else if (tree.center != null)
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{
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this.cmd("SetHighlight", tree.graphicID, 1);
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this.cmd("SetText", 2, "Clerning up after delete ...\nTree has center child, no more cleanup required");
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this.cmd("step");
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this.cmd("SetText", 2, "");
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this.cmd("SetHighlight", tree.graphicID, 0);
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return;
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}
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else if (tree.center == null && tree.right == null && tree.left == null && tree.isword == true)
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{
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this.cmd("SetHighlight", tree.graphicID, 1);
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this.cmd("SetText", 2, "Clerning up after delete ...\nLeaf at end of word, no more cleanup required");
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this.cmd("step");
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this.cmd("SetText", 2, "");
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this.cmd("SetHighlight", tree.graphicID, 0);
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return;
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}
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else if (tree.center == null && tree.left == null && tree.right == null)
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{
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this.cmd("SetText", 2, "Clearning up after delete ...");
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this.cmd("SetHighlight", tree.graphicID, 1);
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this.cmd("step");
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this.cmd("Delete", tree.graphicID);
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if (tree.parent == null)
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{
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this.root = null;
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}
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else if (tree.parent.left == tree)
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{
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this.cmd("Disconnect", tree.parent.graphicID, tree.graphicID);
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tree.parent.left = null;
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}
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else if (tree.parent.right == tree)
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{
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this.cmd("Disconnect", tree.parent.graphicID, tree.graphicID);
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tree.parent.right = null;
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}
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else if (tree.parent.center == tree)
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{
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this.cmd("Disconnect", tree.parent.graphicID, tree.graphicID);
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tree.parent.center = null;
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tree.parent.charAt = " ";
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this.cmd("SetText", tree.parent.graphicID, " ");
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}
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this.cleanupAfterDelete(tree.parent);
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}
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else if ((tree.left == null && tree.center == null) || (tree.right == null && tree.center == null))
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{
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var child = null
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if (tree.left != null)
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child = tree.left
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else
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child = tree.right;
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this.cmd("Disconnect", tree.graphicID, child.graphicID);
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if (tree.parent == null)
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{
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this.cmd("Delete", tree.graphicID);
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this.root = child;
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}
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else if (tree.parent.left == tree)
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{
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this.cmd("Disconnect", tree.parent.graphicID, tree.graphicID);
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this.cmd("Connect", tree.parent.graphicID, child.graphicID, Ternary.SIDE_LINK_COLOR, 0.0001, false, "<" + tree.parent.nextChar)
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tree.parent.left = child;
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child.parent = tree.parent;
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this.cmd("Step");
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this.cmd("Delete", tree.graphicID);
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}
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else if (tree.parent.right == tree)
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{
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this.cmd("Disconnect", tree.parent.graphicID, tree.graphicID);
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this.cmd("Connect", tree.parent.graphicID, child.graphicID, Ternary.SIDE_LINK_COLOR, -0.0001, false, ">" + tree.parent.nextChar)
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tree.parent.right = child;
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child.parent = tree.parent;
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this.cmd("Step");
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this.cmd("Delete", tree.graphicID);
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}
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else if (tree.parent.center == tree)
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{
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this.cmd("Disconnect", tree.parent.graphicID, tree.graphicID);
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this.cmd("Connect", tree.parent.graphicID, child.graphicID, Ternary.CENTER_LINK_COLOR, 0.0001, false, "=" + tree.parent.nextChar)
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child.parent = tree.parent;
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tree.parent.center = child;
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this.cmd("Step");
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this.cmd("Delete", tree.graphicID);
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}
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else
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{
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throw("What??")
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}
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}
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else if (tree.right != null && tree.center == null && tree.right != null)
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{
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var node = tree.left;
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var parent = tree.parent;
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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("Move", this.highlightID, node.x, node.y);
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this.cmd("Step")
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while (node.right != null)
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{
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node = node.right;
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this.cmd("Move", this.highlightID, node.x, node.y);
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this.cmd("Step")
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}
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if (tree.left != node)
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{
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this.cmd("Disconnect", node.parent.graphicID, node.graphicID);
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node.parent.right = node.left;
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if (node.left != null)
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{
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node.left.parent = node.parent;
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this.cmd("Disconnect", node.graphicID, node.left.graphicID);
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this.cmd("Connect", node.parent.graphicID, node.left.graphicID, Ternary.CENTER_LINK_COLOR, -0.0001, false, ">" + node.parent.nextChar)
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}
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this.cmd("Disconnect", tree.graphicID, tree.right.graphicID);
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this.cmd("Disconnect", tree.graphicID, tree.left.graphicID);
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node.right = tree.right;
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node.left = tree.left;
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tree.right.parent = node;
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tree.left.parent = node;
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this.cmd("Connect", node.graphicID, node.left.graphicID, Ternary.SIDE_LINK_COLOR, 0.0001, false, "<" + node.nextChar)
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this.cmd("Connect", node.graphicID, node.right.graphicID, Ternary.SIDE_LINK_COLOR, -0.0001, false, ">" + node.nextChar)
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}
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else
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{
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this.cmd("Disconnect", tree.graphicID, tree.left.graphicID);
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this.cmd("Disconnect", tree.graphicID, tree.right.graphicID);
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node.right = tree.right;
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node.right.parent = node;
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this.cmd("Connect", node.graphicID, node.right.graphicID, Ternary.SIDE_LINK_COLOR, -0.0001, false, ">" + node.nextChar)
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}
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this.cmd("Delete", this.highlightID);
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this.cmd("Delete", tree.graphicID);
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this.cmd("Step");
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node.parent = tree.parent;
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if (node.parent == null)
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{
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this.root = node;
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}
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else
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{
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this.cmd("Disconnect", tree.parent.graphicID, tree.graphicID);
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if (tree.parent.left == tree)
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{
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tree.parent.left = node;
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node.parent = tree.parent;
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this.cmd("Connect", node.parent.graphicID, node.graphicID, Ternary.SIDE_LINK_COLOR, 0.0001, false, "<" + node.parent.nextChar)
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}
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else if (tree.parent.right == tree)
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{
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tree.parent.right = node;
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node.parent = tree.parent;
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this.cmd("Connect", node.parent.graphicID, node.graphicID, Ternary.SIDE_LINK_COLOR, -0.0001, false, ">" + node.parent.nextChar)
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}
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else if (tree.parent.center == tree)
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{
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tree.parent.center = node;
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node.parent = tree.parent;
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this.cmd("Connect", node.parent.graphicID, node.graphicID, Ternary.CENTER_LINK_COLOR, 0.0001, false, "=" + node.parent.nextChar)
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}
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else
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{
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}
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}
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}
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}
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Ternary.prototype.deleteElement = function(word)
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{
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this.commands = [];
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this.cmd("SetText", 0, "正在刪除： ");
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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("SetHighlight", node.graphicID , 1);
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this.cmd("SetText", 2, "Found \""+word+"\", setting value in tree to False");
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this.cmd("step")
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this.cmd("SetBackgroundColor", node.graphicID, Ternary.FALSE_COLOR);
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node.isword = false
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this.cmd("SetHighlight", node.graphicID , 0);
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this.cleanupAfterDelete(node)
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this.resizeTree()
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}
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else
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{
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this.cmd("SetText", 2, "\""+word+"\" not in tree, nothing to delete");
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this.cmd("step")
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this.cmd("SetHighlightIndex", 1, -1)
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}
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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.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.printTree = function(unused)
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{
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this.commands = [];
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if (this.root != null)
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{
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this.highlightID = this.nextIndex++;
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this.printLabel1 = this.nextIndex++;
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this.printLabel2 = this.nextIndex++;
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var firstLabel = this.nextIndex++;
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this.cmd("CreateLabel", firstLabel, "Output: ", Ternary.FIRST_PRINT_POS_X, this.first_print_pos_y);
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this.cmd("CreateHighlightCircle", this.highlightID, Ternary.HIGHLIGHT_CIRCLE_COLOR, this.root.x, this.root.y);
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this.cmd("SetWidth", this.highlightID, Ternary.NODE_WIDTH);
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this.cmd("CreateLabel", this.printLabel1, "Current String: ", 20, 10, 0);
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this.cmd("CreateLabel", this.printLabel2, "", 20, 10, 0);
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this.cmd("AlignRight", this.printLabel2, this.printLabel1);
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this.xPosOfNextLabel = Ternary.FIRST_PRINT_POS_X;
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this.yPosOfNextLabel = this.first_print_pos_y;
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this.printTreeRec(this.root, "");
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// this.cmd("SetText", this.printLabel1, "About to delete");
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// this.cmd("Step")
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this.cmd("Delete", this.highlightID);
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this.cmd("Delete", this.printLabel1);
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this.cmd("Delete", this.printLabel2);
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this.cmd("Step")
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for (var i = firstLabel; i < this.nextIndex; i++)
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{
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this.cmd("Delete", i);
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}
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this.nextIndex = this.highlightID; /// Reuse objects. Not necessary.
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}
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return this.commands;
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}
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Ternary.prototype.printTreeRec = function(tree, stringSoFar)
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{
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if (tree.isword)
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{
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var nextLabelID = this.nextIndex++;
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this.cmd("CreateLabel", nextLabelID, stringSoFar + " ", 20, 10, 0);
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this.cmd("SetForegroundColor", nextLabelID, Ternary.PRINT_COLOR);
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this.cmd("AlignRight", nextLabelID, this.printLabel1, Ternary.PRINT_COLOR);
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this.cmd("MoveToAlignRight", nextLabelID, nextLabelID - 1);
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this.cmd("Step");
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this.xPosOfNextLabel += Ternary.PRINT_HORIZONTAL_GAP;
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if (this.xPosOfNextLabel > this.print_max)
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{
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this.xPosOfNextLabel = Ternary.FIRST_PRINT_POS_X;
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this.yPosOfNextLabel += Ternrary.PRINT_VERTICAL_GAP;
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}
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}
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if (tree.left != null)
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{
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this.cmd("Move", this.highlightID, tree.left.x, tree.left.y);
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this.cmd("Step");
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this.printTreeRec(tree.left, stringSoFar);
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this.cmd("Move", this.highlightID, tree.x, tree.y);
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this.cmd("Step");
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}
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if (tree.center != null)
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{
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var nextLabelID = this.nextIndex;
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this.cmd("CreateLabel", nextLabelID, tree.nextChar, tree.x, tree.y, 0);
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this.cmd("MoveToAlignRight", nextLabelID, this.printLabel2);
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this.cmd("Move", this.highlightID, tree.center.x, tree.center.y);
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this.cmd("Step");
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this.cmd("Delete", nextLabelID);
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this.cmd("SetText", this.printLabel2, stringSoFar + tree.nextChar);
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this.printTreeRec(tree.center, stringSoFar + tree.nextChar);
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this.cmd("Move", this.highlightID, tree.x, tree.y);
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this.cmd("SetText", this.printLabel2, stringSoFar);
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this.cmd("Step");
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}
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if (tree.right != null)
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{
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this.cmd("Move", this.highlightID, tree.right.x, tree.right.y);
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this.cmd("Step");
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this.printTreeRec(tree.right, stringSoFar);
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this.cmd("Move", this.highlightID, tree.x, tree.y);
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this.cmd("Step");
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}
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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： ");
|
|
this.cmd("SetText", 1, "\"" + word + "\"");
|
|
this.cmd("AlignRight", 1, 0);
|
|
this.cmd("Step");
|
|
|
|
|
|
var node = this.doFind(this.root, word);
|
|
if (node != null)
|
|
{
|
|
this.cmd("SetText", 0, "Found \""+word+"\"");
|
|
}
|
|
else
|
|
{
|
|
this.cmd("SetText", 0, "\""+word+"\" not Found");
|
|
}
|
|
|
|
this.cmd("SetText", 1, "");
|
|
this.cmd("SetText", 2, "");
|
|
|
|
return this.commands;
|
|
}
|
|
|
|
|
|
Ternary.prototype.doFind = function(tree, s)
|
|
{
|
|
|
|
if (tree == null)
|
|
{
|
|
this.cmd("SetText", 2, "Reached null tree\nWord is not in the tree");
|
|
this.cmd("Step");
|
|
return null;
|
|
}
|
|
this.cmd("SetHighlight", tree.graphicID , 1);
|
|
|
|
if (s.length == 0)
|
|
{
|
|
if (tree.isword == true)
|
|
{
|
|
this.cmd("SetText", 2, "Reached the end of the string \nCurrent node is True\nWord is in the tree");
|
|
this.cmd("Step");
|
|
this.cmd("SetHighlight", tree.graphicID , 0);
|
|
return tree
|
|
}
|
|
else
|
|
{
|
|
this.cmd("SetText", 2, "Reached the end of the string \nCurrent node is False\nWord is Not the tree");
|
|
this.cmd("Step");
|
|
this.cmd("SetHighlight", tree.graphicID , 0);
|
|
return null
|
|
|
|
}
|
|
}
|
|
else
|
|
{
|
|
this.cmd("SetHighlightIndex", 1, 1);
|
|
|
|
var child = null;
|
|
if (tree.nextChar == " ")
|
|
{
|
|
this.cmd("SetText", 2, "Reached a leaf without a character, still have characeters left in search string \nString is not in the tree");
|
|
this.cmd("Step");
|
|
this.cmd("SetHighlightIndex", 1, -1);
|
|
this.cmd("SetHighlight", tree.graphicID , 0);
|
|
return null;
|
|
}
|
|
|
|
if (tree.nextChar == s.charAt(0))
|
|
{
|
|
this.cmd("SetText", 2, "Next character in string matches character at current node\nRecursively look at center child, \nremoving first letter from search string");
|
|
this.cmd("Step");
|
|
s = s.substring(1);
|
|
child = tree.center;
|
|
}
|
|
else if (tree.nextChar > s.charAt(0))
|
|
{
|
|
this.cmd("SetText", 2, "Next character in string < Character at current node\nRecursively look at left node, \nleaving search string as it is");
|
|
this.cmd("Step");
|
|
child = tree.left;
|
|
}
|
|
else
|
|
{
|
|
this.cmd("SetText", 2, "Next character in string > Character at current node\nRecursively look at left right, \nleaving search string as it is");
|
|
this.cmd("Step");
|
|
child = tree.right;
|
|
}
|
|
if (child != null)
|
|
{
|
|
this.cmd("SetText", 1, "\""+s+"\"");
|
|
this.cmd("SetHighlightIndex", 1, -1);
|
|
|
|
this.cmd("CreateHighlightCircle", this.highlightID, Ternary.HIGHLIGHT_CIRCLE_COLOR, tree.x, tree.y);
|
|
this.cmd("SetWidth", this.highlightID, Ternary.NODE_WIDTH);
|
|
this.cmd("SetHighlight", tree.graphicID , 0);
|
|
|
|
this.cmd("Move", this.highlightID, child.x, child.y);
|
|
this.cmd("Step")
|
|
this.cmd("Delete", this.highlightID);
|
|
|
|
}
|
|
else
|
|
{
|
|
this.cmd("SetHighlight", tree.graphicID , 0);
|
|
}
|
|
return this.doFind(child, s)
|
|
}
|
|
}
|
|
|
|
Ternary.prototype.insertElement = function(insertedValue)
|
|
{
|
|
this.cmd("SetText", 0, "");
|
|
return this.commands;
|
|
}
|
|
|
|
|
|
Ternary.prototype.insert = function(elem, tree)
|
|
{
|
|
|
|
}
|
|
|
|
|
|
|
|
Ternary.prototype.resizeTree = function()
|
|
{
|
|
this.resizeWidths(this.root);
|
|
if (this.root != null)
|
|
{
|
|
var startingPoint = Ternary.LeftMargin;
|
|
if (this.root.left == null)
|
|
{
|
|
startingPoint += Ternary.NODE_WIDTH / 2;
|
|
}
|
|
else
|
|
{
|
|
startingPoint += this.root.left.width;
|
|
}
|
|
|
|
// var startingPoint = this.root.width / 2 + 1 + Ternary.LeftMargin;
|
|
this.setNewPositions(this.root, startingPoint, Ternary.STARTING_Y);
|
|
this.animateNewPositions(this.root);
|
|
this.cmd("Step");
|
|
}
|
|
|
|
}
|
|
|
|
|
|
Ternary.prototype.add = function(word)
|
|
{
|
|
this.commands = new Array();
|
|
this.cmd("SetText", 0, "Inserting; ");
|
|
this.cmd("SetText", 1, "\"" + word + "\"");
|
|
this.cmd("AlignRight", 1, 0);
|
|
this.cmd("Step");
|
|
if (this.root == null)
|
|
{
|
|
this.cmd("CreateCircle", this.nextIndex, " ", Ternary.NEW_NODE_X, Ternary.NEW_NODE_Y);
|
|
this.cmd("SetForegroundColor", this.nextIndex, Ternary.FOREGROUND_COLOR);
|
|
this.cmd("SetBackgroundColor", this.nextIndex, Ternary.FALSE_COLOR);
|
|
this.cmd("SetWidth", this.nextIndex, Ternary.NODE_WIDTH);
|
|
this.cmd("SetText", 2, "Creating a new root");
|
|
this.root = new TernaryNode(" ", this.nextIndex, Ternary.NEW_NODE_X, Ternary.NEW_NODE_Y)
|
|
this.cmd("Step");
|
|
this.resizeTree();
|
|
this.cmd("SetText", 2, "" );
|
|
this.nextIndex += 1;
|
|
this.highlightID = this.nextIndex++;
|
|
|
|
}
|
|
this.addR(word.toUpperCase(), this.root);
|
|
this.cmd("SetText", 0, "");
|
|
this.cmd("SetText", 1, "");
|
|
this.cmd("SetText", 2, "");
|
|
|
|
return this.commands;
|
|
}
|
|
|
|
|
|
Ternary.prototype.createIfNotExtant = function (tree, child, label)
|
|
{
|
|
if (child == null)
|
|
{
|
|
this.cmd("CreateCircle", this.nextIndex, " ", Ternary.NEW_NODE_X, Ternary.NEW_NODE_Y);
|
|
this.cmd("SetForegroundColor", this.nextIndex, Ternary.FOREGROUND_COLOR);
|
|
this.cmd("SetBackgroundColor", this.nextIndex, Ternary.FALSE_COLOR);
|
|
this.cmd("SetWidth", this.nextIndex, Ternary.NODE_WIDTH);
|
|
this.cmd("SetText", 2, "Creating a new node");
|
|
child = new TernaryNode(" ", this.nextIndex, Ternary.NEW_NODE_X, Ternary.NEW_NODE_Y)
|
|
this.cmd("Step");
|
|
var dir = 0.0001;
|
|
if (label.charAt(0) == '>')
|
|
{
|
|
dir = -0.0001
|
|
|
|
}
|
|
var color = Ternary.FOREGROUND_COLOR;
|
|
if (label.charAt(0) == "=")
|
|
{
|
|
color = Ternary.CENTER_LINK_COLOR;
|
|
}
|
|
else
|
|
{
|
|
color = Ternary.SIDE_LINK_COLOR;
|
|
}
|
|
this.cmd("Connect", tree.graphicID, this.nextIndex, color, dir, false, label)
|
|
this.cmd("SetText", 2, "" );
|
|
this.nextIndex++;
|
|
this.highlightID = this.nextIndex++;
|
|
|
|
}
|
|
return child;
|
|
}
|
|
|
|
|
|
Ternary.prototype.addR = function(s, tree)
|
|
{
|
|
this.cmd("SetHighlight", tree.graphicID , 1);
|
|
|
|
if (s.length == 0)
|
|
{
|
|
this.cmd("SetText", 2, "Reached the end of the string \nSet current node to true");
|
|
this.cmd("Step");
|
|
this.cmd("SetBackgroundColor", tree.graphicID, Ternary.TRUE_COLOR);
|
|
this.cmd("SetHighlight", tree.graphicID , 0);
|
|
tree.isword = true;
|
|
return;
|
|
}
|
|
else
|
|
{
|
|
this.cmd("SetHighlightIndex", 1, 1);
|
|
if (tree.nextChar == ' ')
|
|
{
|
|
tree.nextChar = s.charAt(0);
|
|
this.cmd("SetText", 2, "No character for this node, setting to " + s.charAt(0));
|
|
this.cmd("SetText", tree.graphicID, s.charAt(0));
|
|
this.cmd("Step");
|
|
if (tree.center == null)
|
|
{
|
|
tree.center = this.createIfNotExtant(tree, tree.center, "="+s.charAt(0));
|
|
tree.center.parent = tree;
|
|
this.resizeTree();
|
|
|
|
}
|
|
this.cmd("SetHighlightIndex", 1, -1);
|
|
this.cmd("SetHighlight", tree.graphicID , 0);
|
|
this.cmd("SetText", 1, "\"" + s.substring(1) + "\"");
|
|
|
|
this.cmd("CreateHighlightCircle", this.highlightID, Ternary.HIGHLIGHT_CIRCLE_COLOR, tree.x, tree.y);
|
|
this.cmd("SetWidth", this.highlightID, Ternary.NODE_WIDTH);
|
|
this.cmd("Move", this.highlightID, tree.center.x, tree.center.y);
|
|
this.cmd("Step")
|
|
this.cmd("Delete", this.highlightID);
|
|
|
|
this.addR(s.substring(1), tree.center)
|
|
}
|
|
else if (tree.nextChar == s.charAt(0))
|
|
{
|
|
this.cmd("CreateHighlightCircle", this.highlightID, Ternary.HIGHLIGHT_CIRCLE_COLOR, tree.x, tree.y);
|
|
this.cmd("SetWidth", this.highlightID, Ternary.NODE_WIDTH);
|
|
this.cmd("SetText", 2, "Making recursive call to center child, passing in \"" + s.substring(1) + "\"");
|
|
this.cmd("Step")
|
|
this.cmd("SetHighlight", tree.graphicID , 0);
|
|
this.cmd("SetHighlightIndex", 1, -1);
|
|
this.cmd("SetText", 1, "\"" + s.substring(1) + "\"");
|
|
this.cmd("Move", this.highlightID, tree.center.x, tree.center.y);
|
|
this.cmd("Step")
|
|
this.cmd("Delete", this.highlightID);
|
|
this.addR(s.substring(1), tree.center)
|
|
}
|
|
else
|
|
{
|
|
var child = null;
|
|
var label = "";
|
|
if (tree.nextChar > s.charAt(0))
|
|
{
|
|
label = "<" + tree.nextChar;
|
|
this.cmd("SetText", 2, "Next character in stirng is < value stored at current node \n Making recursive call to left child passing in \"" + s+ "\"");
|
|
tree.left = this.createIfNotExtant(tree, tree.left, label);
|
|
tree.left.parent = tree;
|
|
this.resizeTree();
|
|
child = tree.left;
|
|
}
|
|
else
|
|
{
|
|
label = ">" + tree.nextChar;
|
|
this.cmd("SetText", 2, "Next character in stirng is > value stored at current node \n Making recursive call to right child passing in \"" + s + "\"");
|
|
tree.right= this.createIfNotExtant(tree, tree.right, label);
|
|
tree.right.parent = tree;
|
|
child = tree.right;
|
|
this.resizeTree();
|
|
|
|
}
|
|
this.cmd("CreateHighlightCircle", this.highlightID, Ternary.HIGHLIGHT_CIRCLE_COLOR, tree.x, tree.y);
|
|
this.cmd("SetWidth", this.highlightID, Ternary.NODE_WIDTH);
|
|
this.cmd("Step")
|
|
this.cmd("SetHighlight", tree.graphicID , 0);
|
|
this.cmd("SetHighlightIndex", 1, -1);
|
|
// this.cmd("SetText", 1, "\"" + s.substring(1) + "\"");
|
|
|
|
this.cmd("Move", this.highlightID, child.x, child.y);
|
|
this.cmd("Step")
|
|
this.cmd("Delete", this.highlightID);
|
|
this.addR(s, child)
|
|
}
|
|
}
|
|
}
|
|
Ternary.prototype.setNewPositions = function(tree, xLeft, yPosition)
|
|
{
|
|
if (tree != null)
|
|
{
|
|
tree.x = xLeft + Ternary.NODE_WIDTH / 2;
|
|
tree.y = yPosition;
|
|
var newYPos = yPosition + Ternary.HEIGHT_DELTA;
|
|
if (tree.left != null)
|
|
{
|
|
this.setNewPositions(tree.left, xLeft, newYPos);
|
|
}
|
|
if (tree.center != null)
|
|
{
|
|
this.setNewPositions(tree.center, xLeft + tree.leftWidth, newYPos);
|
|
tree.x = tree.center.x;
|
|
}
|
|
if (tree.right != null)
|
|
{
|
|
this.setNewPositions(tree.right, xLeft + tree.leftWidth + tree.centerWidth, newYPos);
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
Ternary.prototype.animateNewPositions = function(tree)
|
|
{
|
|
if (tree != null)
|
|
{
|
|
this.cmd("Move", tree.graphicID, tree.x, tree.y);
|
|
this.animateNewPositions(tree.left)
|
|
this.animateNewPositions(tree.center)
|
|
this.animateNewPositions(tree.right)
|
|
|
|
}
|
|
}
|
|
|
|
Ternary.prototype.resizeWidths = function(tree)
|
|
{
|
|
if (tree == null)
|
|
{
|
|
return 0;
|
|
}
|
|
tree.leftWidth = (this.resizeWidths(tree.left));
|
|
tree.centerWidth = (this.resizeWidths(tree.center));
|
|
tree.rightWidth = (this.resizeWidths(tree.right));
|
|
tree.width = Math.max(tree.leftWidth + tree.centerWidth+tree.rightWidth, Ternary.NODE_WIDTH + 4);
|
|
return tree.width;
|
|
}
|
|
|
|
|
|
|
|
|
|
function TernaryNode(val, id, initialX, initialY)
|
|
{
|
|
this.nextChar = val;
|
|
this.x = initialX;
|
|
this.y = initialY;
|
|
this.graphicID = id;
|
|
|
|
this.left = null;
|
|
this.center = null;
|
|
this.right = null;
|
|
this.leftWidth = 0;
|
|
this.centerWidth = 0;
|
|
this.rightWwidth = 0;
|
|
this.parent = null;
|
|
}
|
|
|
|
Ternary.prototype.disableUI = function(event)
|
|
{
|
|
this.insertField.disabled = true;
|
|
this.insertButton.disabled = true;
|
|
this.deleteField.disabled = true;
|
|
this.deleteButton.disabled = true;
|
|
this.findField.disabled = true;
|
|
this.findButton.disabled = true;
|
|
this.printButton.disabled = true;
|
|
}
|
|
|
|
Ternary.prototype.enableUI = function(event)
|
|
{
|
|
this.insertField.disabled = false;
|
|
this.insertButton.disabled = false;
|
|
this.deleteField.disabled = false;
|
|
this.deleteButton.disabled = false;
|
|
this.findField.disabled = false;
|
|
this.findButton.disabled = false;
|
|
this.printButton.disabled = false;
|
|
}
|
|
|
|
|
|
var currentAlg;
|
|
|
|
function init()
|
|
{
|
|
var animManag = initCanvas();
|
|
currentAlg = new Ternary(animManag, canvas.width, canvas.height);
|
|
}
|