349 行
11 KiB
JavaScript
349 行
11 KiB
JavaScript
// Copyright 2011 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 <COPYRIGHT HOLDER> ``AS IS'' AND ANY EXPRESS OR IMPLIED
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// WARRANTIES, INCLUDING, BUT NOT LIMITED 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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function BucketSort(am, w, h)
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{
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this.init(am,w,h);
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}
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var ARRAY_ELEM_WIDTH_SMALL = 30;
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var ARRAY_ELEM_HEIGHT_SMALL = 30;
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var ARRAY_ELEM_START_X_SMALL = 20;
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var ARRAY_ELEMENT_Y_SMALL = 150;
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var POINTER_ARRAY_ELEM_WIDTH_SMALL = 30;
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var POINTER_ARRAY_ELEM_HEIGHT_SMALL = 30;
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var POINTER_ARRAY_ELEM_START_X_SMALL = 20;
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var LINKED_ITEM_HEIGHT_SMALL = 30;
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var LINKED_ITEM_WIDTH_SMALL = 24;
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var LINKED_ITEM_Y_DELTA_SMALL = 50;
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var LINKED_ITEM_POINTER_PERCENT_SMALL = 0.25;
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var MAX_DATA_VALUE = 999;
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var ARRAY_SIZE_SMALL = 30;
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var ARRAY_Y_POS = 350;
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BucketSort.prototype = new Algorithm();
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BucketSort.prototype.constructor = BucketSort;
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BucketSort.superclass = Algorithm.prototype;
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BucketSort.prototype.init = function(am, w, h)
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{
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var sc = BucketSort.superclass;
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var fn = sc.init;
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fn.call(this,am, w, h);
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this.addControls();
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this.pointer_array_elem_y_small = h - 50;
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this.nextIndex = 0;
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this.setup();
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}
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BucketSort.prototype.addControls = function()
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{
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this.resetButton = addControlToAlgorithmBar("Button", "Randomize List");
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this.resetButton.onclick = this.resetCallback.bind(this);
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this.bucketSortButton = addControlToAlgorithmBar("Button", "Bucket Sort");
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this.bucketSortButton.onclick = this.bucketSortCallback.bind(this);
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}
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BucketSort.prototype.setup = function()
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{
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this.arrayData = new Array(ARRAY_SIZE_SMALL);
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this.arrayRects= new Array(ARRAY_SIZE_SMALL);
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this.linkedListRects = new Array(ARRAY_SIZE_SMALL);
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this.linkedListData = new Array(ARRAY_SIZE_SMALL);
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this.upperIndices = new Array(ARRAY_SIZE_SMALL);
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this.lowerIndices = new Array(ARRAY_SIZE_SMALL);
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this.commands = new Array();
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this.oldData = new Array(ARRAY_SIZE_SMALL);
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for (var i = 0; i < ARRAY_SIZE_SMALL; i++)
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{
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var nextID = this.nextIndex++;
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this.arrayData[i] = Math.floor(Math.random()*MAX_DATA_VALUE);
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this.oldData[i] = this.arrayData[i];
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this.cmd("CreateRectangle", nextID, this.arrayData[i], ARRAY_ELEM_WIDTH_SMALL, ARRAY_ELEM_HEIGHT_SMALL, ARRAY_ELEM_START_X_SMALL + i *ARRAY_ELEM_WIDTH_SMALL, ARRAY_ELEMENT_Y_SMALL)
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this.arrayRects[i] = nextID;
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nextID = this.nextIndex++;
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this.cmd("CreateRectangle", nextID, "", POINTER_ARRAY_ELEM_WIDTH_SMALL, POINTER_ARRAY_ELEM_HEIGHT_SMALL, POINTER_ARRAY_ELEM_START_X_SMALL + i *POINTER_ARRAY_ELEM_WIDTH_SMALL, this.pointer_array_elem_y_small)
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this.linkedListRects[i] = nextID;
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this.cmd("SetNull", this.linkedListRects[i], 1);
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nextID = this.nextIndex++;
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this.upperIndices[i] = nextID;
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this.cmd("CreateLabel",nextID, i, ARRAY_ELEM_START_X_SMALL + i *ARRAY_ELEM_WIDTH_SMALL, ARRAY_ELEMENT_Y_SMALL + ARRAY_ELEM_HEIGHT_SMALL);
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this.cmd("SetForegroundColor", nextID, "#0000FF");
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nextID = this.nextIndex++;
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this.lowerIndices[i] = nextID;
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this.cmd("CreateLabel", nextID, i, POINTER_ARRAY_ELEM_START_X_SMALL + i *POINTER_ARRAY_ELEM_WIDTH_SMALL, this.pointer_array_elem_y_small + POINTER_ARRAY_ELEM_HEIGHT_SMALL);
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this.cmd("SetForegroundColor", nextID, "#0000FF");
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}
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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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BucketSort.prototype.bucketSortCallback = function(event)
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{
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var savedIndex = this.nextIndex;
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this.commands = new Array();
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linkedListData = new Array(ARRAY_SIZE_SMALL);
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var i;
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for (i= 0; i < ARRAY_SIZE_SMALL; i++)
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{
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var labelID = this.nextIndex++;
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var label2ID = this.nextIndex++;
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var label3ID = this.nextIndex++;
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var label4ID = this.nextIndex++;
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var node = new LinkedListNode(this.arrayData[i],this.nextIndex++, 100, 75);
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this.cmd("CreateLinkedList", node.graphicID, "", LINKED_ITEM_WIDTH_SMALL, LINKED_ITEM_HEIGHT_SMALL, 100, 75);
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this.cmd("SetNull", node.graphicID, 1);
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this.cmd("CreateLabel", labelID, this.arrayData[i], ARRAY_ELEM_START_X_SMALL + i *ARRAY_ELEM_WIDTH_SMALL, ARRAY_ELEMENT_Y_SMALL);
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this.cmd("SetText", node.graphicID, "")
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this.cmd("SetText", this.arrayRects[i], "")
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this.cmd("Move", labelID, 100,75);
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this.cmd("Step");
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this.cmd("SetText", node.graphicID, this.arrayData[i]);
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this.cmd("Delete", labelID);
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var index = Math.floor((this.arrayData[i] * ARRAY_SIZE_SMALL) / (MAX_DATA_VALUE + 1));
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this.cmd("CreateLabel", labelID, "Linked List Array index = " , 300, 20, 0);
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this.cmd("CreateLabel", label2ID, "Value * NUMBER_OF_ELEMENTS / (MAXIMUM_ARRAY_VALUE + 1)) = ", 300, 40, 0);
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this.cmd("CreateLabel", label3ID, "("+ String(this.arrayData[i]) + " * " + String(ARRAY_SIZE_SMALL) + ") / " + String(MAX_DATA_VALUE+1) + " = " , 300, 60, 0);
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this.cmd("CreateLabel", label4ID, index, 305, 85);
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this.cmd("SetForegroundColor", labelID, "#000000");
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this.cmd("SetForegroundColor", label2ID, "#000000");
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this.cmd("SetForegroundColor", label3ID, "#000000");
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this.cmd("SetForegroundColor", label4ID, "#0000FF");
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var highlightCircle = this.nextIndex++;
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this.cmd("CreateHighlightCircle", highlightCircle, "#0000FF", 305, 100);
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this.cmd("Move", highlightCircle, POINTER_ARRAY_ELEM_START_X_SMALL + index *POINTER_ARRAY_ELEM_WIDTH_SMALL, this.pointer_array_elem_y_small + POINTER_ARRAY_ELEM_HEIGHT_SMALL);
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this.cmd("Step");
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this.cmd("Delete", labelID);
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this.cmd("Delete", label2ID);
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this.cmd("Delete", label3ID);
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this.cmd("Delete", label4ID);
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this.cmd("Delete", highlightCircle);
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if (linkedListData[index] == null)
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{
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linkedListData[index] = node;
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this.cmd("Connect", this.linkedListRects[index], node.graphicID);
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this.cmd("SetNull",this.linkedListRects[index], 0);
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node.x = POINTER_ARRAY_ELEM_START_X_SMALL + index *POINTER_ARRAY_ELEM_WIDTH_SMALL;
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node.y = this.pointer_array_elem_y_small - LINKED_ITEM_Y_DELTA_SMALL;
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this.cmd("Move", node.graphicID, node.x, node.y);
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}
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else
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{
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var tmp = linkedListData[index];
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this.cmd("SetHighlight", tmp.graphicID, 1);
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this.cmd("SetHighlight", node.graphicID, 1);
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this.cmd("Step");
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this.cmd("SetHighlight", tmp.graphicID, 0);
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this.cmd("SetHighlight", node.graphicID, 0);
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if (Number(tmp.data) >= Number(node.data))
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{
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this.cmd("Disconnect", this.linkedListRects[index], linkedListData[index].graphicID);
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node.next = tmp;
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this.cmd("Connect", this.linkedListRects[index], node.graphicID);
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this.cmd("Connect", node.graphicID, tmp.graphicID);
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this.cmd("SetNull",node.graphicID, 0);
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linkedListData[index] = node;
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this.cmd("Connect", this.linkedListRects[index], node.graphicID);
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}
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else
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{
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if (tmp.next != null)
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{
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this.cmd("SetHighlight", tmp.next.graphicID, 1);
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this.cmd("SetHighlight", node.graphicID, 1);
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this.cmd("Step");
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this.cmd("SetHighlight", tmp.next.graphicID, 0);
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this.cmd("SetHighlight", node.graphicID, 0);
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}
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while (tmp.next != null && tmp.next.data < node.data)
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{
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tmp = tmp.next;
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if (tmp.next != null)
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{
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this.cmd("SetHighlight", tmp.next.graphicID, 1);
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this.cmd("SetHighlight", node.graphicID, 1);
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this.cmd("Step");
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this.cmd("SetHighlight", tmp.next.graphicID, 0);
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this.cmd("SetHighlight", node.graphicID, 0);
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}
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}
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if (tmp.next != null)
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{
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this.cmd("Disconnect", tmp.graphicID, tmp.next.graphicID);
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this.cmd("Connect", node.graphicID, tmp.next.graphicID);
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this.cmd("SetNull",node.graphicID, 0);
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}
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else
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{
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this.cmd("SetNull",tmp.graphicID, 0);
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}
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node.next = tmp.next;
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tmp.next = node;
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this.cmd("Connect", tmp.graphicID, node.graphicID);
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}
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tmp = linkedListData[index];
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var startX = POINTER_ARRAY_ELEM_START_X_SMALL + index *POINTER_ARRAY_ELEM_WIDTH_SMALL;
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var startY = this.pointer_array_elem_y_small - LINKED_ITEM_Y_DELTA_SMALL;
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while (tmp != null)
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{
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tmp.x = startX;
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tmp.y = startY;
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this.cmd("Move", tmp.graphicID, tmp.x, tmp.y);
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startY = startY - LINKED_ITEM_Y_DELTA_SMALL;
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tmp = tmp.next;
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}
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}
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this.cmd("Step");
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}
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var insertIndex = 0;
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for (i = 0; i < ARRAY_SIZE_SMALL; i++)
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{
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for (tmp = linkedListData[i]; tmp != null; tmp = tmp.next)
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{
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var moveLabelID = this.nextIndex++;
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this.cmd("SetText", tmp.graphicID, "");
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this.cmd("SetText", this.arrayRects[insertIndex], "");
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this.cmd("CreateLabel", moveLabelID, tmp.data, tmp.x, tmp.y);
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this.cmd("Move", moveLabelID, ARRAY_ELEM_START_X_SMALL + insertIndex *ARRAY_ELEM_WIDTH_SMALL, ARRAY_ELEMENT_Y_SMALL);
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this.cmd("Step");
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this.cmd("Delete", moveLabelID);
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this.cmd("SetText", this.arrayRects[insertIndex], tmp.data);
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this.cmd("Delete", tmp.graphicID);
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if (tmp.next != null)
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{
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this.cmd("Connect", this.linkedListRects[i], tmp.next.graphicID);
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}
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else
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{
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this.cmd("SetNull", this.linkedListRects[i], 1);
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}
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this.arrayData[insertIndex] = tmp.data;
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insertIndex++;
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}
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}
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this.animationManager.StartNewAnimation(this.commands);
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insertIndex = savedIndex;
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}
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BucketSort.prototype.randomizeArray = function()
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{
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this.commands = new Array();
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for (var i = 0; i < ARRAY_SIZE_SMALL; i++)
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{
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this.arrayData[i] = Math.floor(1 + Math.random()*MAX_DATA_VALUE);
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this.oldData[i] = this.arrayData[i];
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this.cmd("SetText", this.arrayRects[i], this.arrayData[i]);
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}
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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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// We want to (mostly) ignore resets, since we are disallowing undoing
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BucketSort.prototype.reset = function()
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{
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this.commands = new Array();
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for (var i = 0; i < ARRAY_SIZE_SMALL; i++)
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{
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this.arrayData[i] = this.oldData[i];
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}
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}
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BucketSort.prototype.resetCallback = function(event)
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{
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this.randomizeArray();
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}
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BucketSort.prototype.disableUI = function(event)
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{
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this.resetButton.disabled = true;
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this.bucketSortButton.disabled = true;
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}
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BucketSort.prototype.enableUI = function(event)
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{
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this.resetButton.disabled = false;
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this.bucketSortButton.disabled = false;
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}
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function LinkedListNode(label, id, x, y)
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{
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this.data = label;
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this.graphicID = id;
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this.x = x;
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this.y = y;
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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 BucketSort(animManag, canvas.width, canvas.height);
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} |