830 行
25 KiB
JavaScript
830 行
25 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 DPLCS(am, w, h)
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{
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this.init(am, w, h);
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}
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DPLCS.prototype = new Algorithm();
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DPLCS.prototype.constructor = DPLCS;
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DPLCS.superclass = Algorithm.prototype;
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DPLCS.TABLE_ELEM_WIDTH = 40;
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DPLCS.TABLE_ELEM_HEIGHT = 30;
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DPLCS.TABLE_START_X = 500;
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DPLCS.TABLE_START_Y = 80;
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DPLCS.TABLE_DIFF_X = 100;
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DPLCS.CODE_START_X = 10;
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DPLCS.CODE_START_Y = 10;
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DPLCS.CODE_LINE_HEIGHT = 14;
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DPLCS.RECURSIVE_START_X = 20;
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DPLCS.RECURSIVE_START_Y = 120;
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DPLCS.RECURSIVE_DELTA_Y = 14;
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DPLCS.RECURSIVE_DELTA_X = 15;
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DPLCS.CODE_HIGHLIGHT_COLOR = "#FF0000";
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DPLCS.CODE_STANDARD_COLOR = "#000000";
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DPLCS.MAX_SEQUENCE_LENGTH = 15;
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DPLCS.TABLE_INDEX_COLOR = "#0000FF"
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DPLCS.CODE_RECURSIVE_1_COLOR = "#339933";
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DPLCS.CODE_RECURSIVE_2_COLOR = "#0099FF";
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DPLCS.SEQUENCE_START_X = 30;
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DPLCS.SEQUENCE_START_Y = 180;
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DPLCS.SEQUENCE_DELTA_X = 10;
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DPLCS.MAX_VALUE = 20;
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DPLCS.MESSAGE_ID = 0;
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DPLCS.prototype.init = function(am, w, h)
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{
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DPLCS.superclass.init.call(this, am, w, h);
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this.nextIndex = 0;
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this.addControls();
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this.code = [["def ","LCS(S1, S2, x, y)",":"],
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[" if (","(x == -1) ", " or ", "(y == -1)", ")" ],
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[" return 0"],
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[" else if ", "(S1[x] == S2[y])"],
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[" return 1 + ","LCS(S1, S2, x-1, y-1)"],
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[" else"],
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[" return max(", "LCS(S1, S2, x-1, y)", ",", "LCS(S1, S2, x, y-1)", ")"]];
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this.codeID = Array(this.code.length);
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var i, j;
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for (i = 0; i < this.code.length; i++)
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{
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this.codeID[i] = new Array(this.code[i].length);
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for (j = 0; j < this.code[i].length; j++)
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{
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this.codeID[i][j] = this.nextIndex++;
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this.cmd("CreateLabel", this.codeID[i][j], this.code[i][j], DPLCS.CODE_START_X, DPLCS.CODE_START_Y + i * DPLCS.CODE_LINE_HEIGHT, 0);
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this.cmd("SetForegroundColor", this.codeID[i][j], DPLCS.CODE_STANDARD_COLOR);
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if (j > 0)
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{
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this.cmd("AlignRight", this.codeID[i][j], this.codeID[i][j-1]);
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}
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}
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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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this.initialIndex = this.nextIndex;
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this.oldIDs = [];
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this.commands = [];
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}
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DPLCS.prototype.addControls = function()
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{
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this.controls = [];
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addLabelToAlgorithmBar("S1:");
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this.S1Field = addControlToAlgorithmBar("Text", "");
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this.S1Field.onkeydown = this.returnSubmit(this.S1Field, this.emptyCallback.bind(this), DPLCS.MAX_SEQUENCE_LENGTH, false);
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this.controls.push(this.S1Field);
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addLabelToAlgorithmBar("S2:");
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this.S2Field = addControlToAlgorithmBar("Text", "");
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this.S2Field.onkeydown = this.returnSubmit(this.S2Field, this.emptyCallback.bind(this), DPLCS.MAX_SEQUENCE_LENGTH, false);
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this.controls.push(this.S2Field);
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this.recursiveButton = addControlToAlgorithmBar("Button", "LCS Recursive");
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this.recursiveButton.onclick = this.recursiveCallback.bind(this);
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this.controls.push(this.recursiveButton);
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this.tableButton = addControlToAlgorithmBar("Button", "LCS Table");
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this.tableButton.onclick = this.tableCallback.bind(this);
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this.controls.push(this.tableButton);
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this.memoizedButton = addControlToAlgorithmBar("Button", "LCS Memoized");
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this.memoizedButton.onclick = this.memoizedCallback.bind(this);
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this.controls.push(this.memoizedButton);
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}
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DPLCS.prototype.buildTable = function(S1, S2)
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{
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var x = S1.length;
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var y = S2.length;
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this.tableID = new Array(x+1);
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this.tableVals = new Array(x + 1);
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this.tableXPos = new Array(x + 1);
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this.tableYPos = new Array(x + 1);
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var i, j;
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var sequence1ID = new Array(x);
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var sequence2ID = new Array(y);
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this.S1TableID = new Array(x);
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for (i = 0; i <=x; i++)
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{
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if (i > 0)
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{
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this.S1TableID[i-1] = this.nextIndex++;
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this.cmd("CreateLabel", this.S1TableID[i-1], S1.charAt(i-1),DPLCS.TABLE_START_X + i*DPLCS.TABLE_ELEM_WIDTH, DPLCS.TABLE_START_Y - 2 * DPLCS.TABLE_ELEM_HEIGHT);
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this.oldIDs.push(this.S1TableID[i-1]);
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}
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var index = this.nextIndex++;
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this.oldIDs.push(index);
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this.cmd("CreateLabel", index, i - 1,DPLCS.TABLE_START_X + i*DPLCS.TABLE_ELEM_WIDTH, DPLCS.TABLE_START_Y - 1 * DPLCS.TABLE_ELEM_HEIGHT);
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this.cmd("SetForegroundColor", index, "#0000FF");
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}
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this.S2TableID = new Array(y);
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for (i = 0; i <=y; i++)
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{
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if (i > 0)
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{
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this.S2TableID[i-1] = this.nextIndex++;
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this.cmd("CreateLabel", this.S2TableID[i-1], S2.charAt(i-1),DPLCS.TABLE_START_X - 2 * DPLCS.TABLE_ELEM_WIDTH, DPLCS.TABLE_START_Y + i * DPLCS.TABLE_ELEM_HEIGHT);
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this.oldIDs.push(this.S2TableID[i-1]);
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}
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var index = this.nextIndex++;
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this.oldIDs.push(index);
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this.cmd("CreateLabel", index, i - 1, DPLCS.TABLE_START_X - 1 * DPLCS.TABLE_ELEM_WIDTH, DPLCS.TABLE_START_Y + i * DPLCS.TABLE_ELEM_HEIGHT);
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this.cmd("SetForegroundColor", index, "#0000FF");
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}
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for (i = 0; i <= x; i++)
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{
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this.tableID[i] = new Array(y+1);
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this.tableVals[i] =new Array(y+1);
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this.tableXPos[i] = new Array(y+1);
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this.tableYPos[i] = new Array(y+1);
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for (j = 0; j <= y; j++)
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{
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this.tableID[i][j] = this.nextIndex++;
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this.tableVals[i][j] = -1;
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this.oldIDs.push(this.tableID[i][j]);
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this.tableXPos[i][j] =DPLCS.TABLE_START_X + i * DPLCS.TABLE_ELEM_WIDTH;
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this.tableYPos[i][j] = DPLCS.TABLE_START_Y + j * DPLCS.TABLE_ELEM_HEIGHT;
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this.cmd("CreateRectangle", this.tableID[i][j],
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"",
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DPLCS.TABLE_ELEM_WIDTH,
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DPLCS.TABLE_ELEM_HEIGHT,
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this.tableXPos[i][j],
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this.tableYPos[i][j]);
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}
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}
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}
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DPLCS.prototype.clearOldIDs = function()
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{
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for (var i = 0; i < this.oldIDs.length; i++)
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{
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this.cmd("Delete", this.oldIDs[i]);
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}
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this.oldIDs =[];
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this.nextIndex = this.initialIndex;
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}
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DPLCS.prototype.reset = function()
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{
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this.oldIDs =[];
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this.nextIndex = this.initialIndex;
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}
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DPLCS.prototype.emptyCallback = function(event)
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{
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this.implementAction(this.helpMessage.bind(this), "");
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// TODO: Put up a message to push the appropriate button?
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}
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DPLCS.prototype.recursiveCallback = function(event)
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{
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var fibValue;
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if (this.S1Field.value != "" && this.S2Field.value != "" )
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{
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this.implementAction(this.recursiveLCS.bind(this),this.S1Field.value + ";" + this.S2Field.value);
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}
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else
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{
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this.implementAction(this.helpMessage.bind(this), "");
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}
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}
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DPLCS.prototype.tableCallback = function(event)
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{
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var fibValue;
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if (this.S1Field.value != "" && this.S2Field.value != "" )
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{
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this.implementAction(this.tableLCS.bind(this),this.S1Field.value + ";" + this.S2Field.value);
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}
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else
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{
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this.implementAction(this.helpMessage.bind(this), "");
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}
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}
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DPLCS.prototype.memoizedCallback = function(event)
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{
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var fibValue;
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if (this.S1Field.value != "" && this.S2Field.value != "" )
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{
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this.implementAction(this.memoizedLCS.bind(this), this.S1Field.value + ";" + this.S2Field.value);
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}
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else
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{
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this.implementAction(this.helpMessage.bind(this), "");
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}
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}
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DPLCS.prototype.helpMessage = function(value)
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{
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this.commands = [];
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this.clearOldIDs();
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var messageID = this.nextIndex++;
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this.oldIDs.push(messageID);
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this.cmd("CreateLabel", messageID,
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"Enter two sequences in the text fields.\n" +
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"Then press the LCS Recursive, LCS Table, or LCS Memoized button",
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DPLCS.RECURSIVE_START_X, DPLCS.RECURSIVE_START_Y, 0);
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return this.commands;
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}
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DPLCS.prototype.recursiveLCS = function(value)
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{
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this.commands = [];
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var sequences=value.split(";");
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this.clearOldIDs();
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this.currentY = DPLCS.RECURSIVE_START_Y;
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var functionCallID = this.nextIndex++;
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this.oldIDs.push(functionCallID);
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var final = this.LCS(sequences[0], sequences[1], sequences[0].length - 1, sequences[1].length - 1, DPLCS.RECURSIVE_START_X, functionCallID);
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this.cmd("SetText", functionCallID, "LCS(" + sequences[0] + ", " + sequences[1] + ", " + String(sequences[0].length - 1) + ", " + String(sequences[1].length - 1) + ") = " + String(final));
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return this.commands;
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}
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DPLCS.prototype.LCS = function(S1, S2, x, y, xPos, ID)
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{
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var ID2 = this.nextIndex++;
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this.cmd("CreateLabel", ID, "LCS(" + S1 + ", " + S2 + ", " + String(x) + ", "+ String(y) + ")", xPos, this.currentY, 0);
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this.cmd("CreateLabel", ID2, " [LCS(" + S1.substring(0,x + 1)+ "," + S2.substring(0,y + 1) + ")]");
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this.cmd("SetForegroundColor", ID2, "#3333FF");
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this.cmd("AlignRight", ID2, ID);
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this.cmd("SetForegroundColor", this.codeID[0][1], DPLCS.CODE_HIGHLIGHT_COLOR);
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this.cmd("Step");
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this.cmd("SetForegroundColor", this.codeID[0][1], DPLCS.CODE_STANDARD_COLOR);
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if (x == -1 || y == -1)
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{
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if (x == -1)
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{
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this.cmd("SetForegroundColor", this.codeID[1][1], DPLCS.CODE_HIGHLIGHT_COLOR);
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}
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if (y == -1)
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{
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this.cmd("SetForegroundColor", this.codeID[1][3], DPLCS.CODE_HIGHLIGHT_COLOR);
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}
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this.cmd("Step");
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if (x == -1)
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{
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this.cmd("SetForegroundColor", this.codeID[1][1], DPLCS.CODE_STANDARD_COLOR);
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}
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if (y == -1)
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{
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this.cmd("SetForegroundColor", this.codeID[1][3], DPLCS.CODE_STANDARD_COLOR);
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}
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this.cmd("SetForegroundColor", this.codeID[2][0], DPLCS.CODE_HIGHLIGHT_COLOR);
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this.cmd("SetText", ID, 0);
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this.cmd("Delete", ID2);
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this.cmd("Step");
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this.cmd("SetForegroundColor", this.codeID[2][0], DPLCS.CODE_STANDARD_COLOR);
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return 0;
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}
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this.cmd("SetForegroundColor", this.codeID[3][1], DPLCS.CODE_HIGHLIGHT_COLOR);
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this.cmd("Step");
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this.cmd("SetForegroundColor", this.codeID[3][1], DPLCS.CODE_STANDARD_COLOR);
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if (S1.charAt(x) == S2.charAt(y))
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{
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this.cmd("SetForegroundColor", this.codeID[4][1], DPLCS.CODE_HIGHLIGHT_COLOR);
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this.cmd("Step");
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this.cmd("SetForegroundColor", this.codeID[4][1], DPLCS.CODE_STANDARD_COLOR);
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var nextID = this.nextIndex++;
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this.currentY += DPLCS.RECURSIVE_DELTA_Y;
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var subProb = this.LCS(S1, S2, x-1, y-1, xPos + DPLCS.RECURSIVE_DELTA_X, nextID);
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this.cmd("SetForegroundColor", this.codeID[4][0], DPLCS.CODE_HIGHLIGHT_COLOR);
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this.cmd("Step");
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this.cmd("SetForegroundColor", this.codeID[4][0], DPLCS.CODE_STANDARD_COLOR);
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this.cmd("Delete", nextID);
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this.cmd("SetText", ID, subProb + 1);
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this.cmd("Delete", ID2);
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this.cmd("step");
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this.currentY -= DPLCS.RECURSIVE_DELTA_Y;
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return subProb + 1
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}
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else
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{
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var firstID = this.nextIndex++;
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var secondID = this.nextIndex++;
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this.currentY += DPLCS.RECURSIVE_DELTA_Y;
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this.cmd("SetForegroundColor", this.codeID[6][1], DPLCS.CODE_HIGHLIGHT_COLOR);
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this.cmd("Step");
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this.cmd("SetForegroundColor", this.codeID[6][1], DPLCS.CODE_STANDARD_COLOR);
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var subProb1 = this.LCS(S1, S2, x-1, y, xPos + DPLCS.RECURSIVE_DELTA_X, firstID);
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this.currentY += DPLCS.RECURSIVE_DELTA_Y;
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this.cmd("SetForegroundColor", this.codeID[6][3], DPLCS.CODE_HIGHLIGHT_COLOR);
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this.cmd("Step");
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this.cmd("SetForegroundColor", this.codeID[6][3], DPLCS.CODE_STANDARD_COLOR);
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var subProb2 = this.LCS(S1, S2, x, y-1, xPos + DPLCS.RECURSIVE_DELTA_X, secondID);
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this.cmd("SetForegroundColor", this.codeID[6][0], DPLCS.CODE_HIGHLIGHT_COLOR);
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this.cmd("SetForegroundColor", this.codeID[6][2], DPLCS.CODE_HIGHLIGHT_COLOR);
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this.cmd("SetForegroundColor", this.codeID[6][4], DPLCS.CODE_HIGHLIGHT_COLOR);
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this.cmd("Step");
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this.cmd("SetForegroundColor", this.codeID[6][0], DPLCS.CODE_STANDARD_COLOR);
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this.cmd("SetForegroundColor", this.codeID[6][2], DPLCS.CODE_STANDARD_COLOR);
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this.cmd("SetForegroundColor", this.codeID[6][4], DPLCS.CODE_STANDARD_COLOR);
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this.cmd("Delete", firstID);
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this.cmd("Delete", secondID);
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this.currentY -= 2*DPLCS.RECURSIVE_DELTA_Y;
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var best = Math.max(subProb1, subProb2);
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this.cmd("SetText", ID, best);
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this.cmd("Delete", ID2);
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this.cmd("step");
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return best;
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}
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}
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DPLCS.prototype.buildLCSFromTable = function(S1, S2)
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{
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var currX = this.tableVals.length - 1;
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var currY = this.tableVals[0].length - 1;
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var sequence = [];
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var header = this.nextIndex++;
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this.oldIDs.push(header);
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this.cmd("CreateLabel", header, "Sequence", DPLCS.SEQUENCE_START_X, DPLCS.SEQUENCE_START_Y - 30, 0);
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this.cmd("SetForegroundColor", header, "#003300");
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while (currX > 0 && currY > 0)
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{
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this.cmd("SetHighlight", this.tableID[currX][currY], 1);
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this.cmd("Step");
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this.cmd("SetHighlight", this.S1TableID[currX-1], 1);
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this.cmd("SetHighlight", this.S2TableID[currY-1], 1);
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this.cmd("Step");
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this.cmd("SetHighlight", this.S1TableID[currX-1], 0);
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this.cmd("SetHighlight", this.S2TableID[currY-1], 0);
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this.cmd("SetHighlight", this.tableID[currX][currY], 0);
|
|
|
|
if (S1.charAt(currX - 1) == S2.charAt(currY - 1))
|
|
{
|
|
var nextSequenceID = this.nextIndex++;
|
|
this.oldIDs.push(nextSequenceID);
|
|
sequence.push(nextSequenceID);
|
|
this.cmd("CreateLabel", nextSequenceID, S1.charAt(currX - 1), DPLCS.TABLE_START_X + currX*DPLCS.TABLE_ELEM_WIDTH, DPLCS.TABLE_START_Y - 2 * DPLCS.TABLE_ELEM_HEIGHT);
|
|
this.cmd("SetForegroundColor", nextSequenceID, "#0000FF");
|
|
|
|
for (var i = sequence.length - 1; i >=0; i--)
|
|
{
|
|
this.cmd("Move", sequence[i], DPLCS.SEQUENCE_START_X + (sequence.length - 1 - i) * DPLCS.SEQUENCE_DELTA_X, DPLCS.SEQUENCE_START_Y);
|
|
}
|
|
|
|
currX = currX - 1;
|
|
currY = currY - 1;
|
|
}
|
|
else
|
|
{
|
|
this.cmd("SetHighlight", this.tableID[currX-1][currY], 1);
|
|
this.cmd("SetHighlight", this.tableID[currX][currY - 1], 1);
|
|
this.cmd("Step");
|
|
this.cmd("SetHighlight", this.tableID[currX-1][currY], 0);
|
|
this.cmd("SetHighlight", this.tableID[currX][currY - 1], 0 );
|
|
|
|
if (this.tableVals[currX-1][currY] > this.tableVals[currX][currY - 1])
|
|
{
|
|
currX = currX - 1;
|
|
}
|
|
else
|
|
{
|
|
currY = currY - 1;
|
|
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
DPLCS.prototype.tableLCS = function(value)
|
|
{
|
|
this.commands = [];
|
|
this.clearOldIDs();
|
|
|
|
var sequences=value.split(";");
|
|
|
|
this.buildTable(sequences[0], sequences[1]);
|
|
|
|
var moveID = this.nextIndex++;
|
|
var x = sequences[0].length;
|
|
var y = sequences[1].length;
|
|
var i, j;
|
|
|
|
for (i = 0; i <= x; i++)
|
|
{
|
|
this.cmd("SetText", this.tableID[i][0], "0");
|
|
this.tableVals[i][0] = 0;
|
|
}
|
|
for (i = 0; i <= y; i++)
|
|
{
|
|
this.cmd("SetText", this.tableID[0][i], "0");
|
|
this.tableVals[0][i] = 0;
|
|
}
|
|
this.cmd("Step");
|
|
for (j = 0; j < y; j++)
|
|
{
|
|
for (i = 0; i < x; i++)
|
|
{
|
|
this.cmd("SetHighlight", this.tableID[i+1][j+1], 1);
|
|
this.cmd("SetHighlight", this.S1TableID[i], 1);
|
|
this.cmd("SetHighlight", this.S2TableID[j], 1);
|
|
this.cmd("SetForegroundColor", this.codeID[3][1], DPLCS.CODE_HIGHLIGHT_COLOR);
|
|
this.cmd("Step")
|
|
this.cmd("SetHighlight", this.S1TableID[i], 0);
|
|
this.cmd("SetHighlight", this.S2TableID[j], 0);
|
|
this.cmd("SetForegroundColor", this.codeID[3][1], DPLCS.CODE_STANDARD_COLOR);
|
|
if (sequences[0].charAt(i) == sequences[1].charAt(j))
|
|
{
|
|
this.cmd("SetForegroundColor", this.codeID[4][0], DPLCS.CODE_HIGHLIGHT_COLOR);
|
|
this.cmd("SetForegroundColor", this.codeID[4][1], DPLCS.CODE_HIGHLIGHT_COLOR);
|
|
this.cmd("SetHighlight", this.tableID[i+1-1][j+1-1], 1);
|
|
this.cmd("Step");
|
|
this.cmd("CreateLabel", moveID, this.tableVals[i][j] + 1, this.tableXPos[i][j], this.tableYPos[i][j]);
|
|
this.cmd("Move", moveID, this.tableXPos[i+1][j+1], this.tableYPos[i+1][j+1]);
|
|
this.cmd("Step");
|
|
this.cmd("Delete", moveID);
|
|
this.cmd("SetForegroundColor", this.codeID[4][0], DPLCS.CODE_STANDARD_COLOR);
|
|
this.cmd("SetForegroundColor", this.codeID[4][1], DPLCS.CODE_STANDARD_COLOR);
|
|
this.cmd("SetHighlight", this.tableID[i+1-1][j+1-1], 0);
|
|
this.tableVals[i+1][j+1] = this.tableVals[i][j] + 1;
|
|
this.cmd("SetText", this.tableID[i+1][j+1], this.tableVals[i+1][j+1]);
|
|
}
|
|
else
|
|
{
|
|
this.cmd("SetForegroundColor", this.codeID[6][0], DPLCS.CODE_HIGHLIGHT_COLOR);
|
|
this.cmd("SetForegroundColor", this.codeID[6][1], DPLCS.CODE_HIGHLIGHT_COLOR);
|
|
this.cmd("SetForegroundColor", this.codeID[6][2], DPLCS.CODE_HIGHLIGHT_COLOR);
|
|
this.cmd("SetForegroundColor", this.codeID[6][3], DPLCS.CODE_HIGHLIGHT_COLOR);
|
|
this.cmd("SetForegroundColor", this.codeID[6][4], DPLCS.CODE_HIGHLIGHT_COLOR);
|
|
|
|
this.cmd("SetHighlight", this.tableID[i][j+1], 1);
|
|
this.cmd("SetHighlight", this.tableID[i+1][j], 1);
|
|
this.cmd("Step");
|
|
this.cmd("SetForegroundColor", this.codeID[6][0], DPLCS.CODE_STANDARD_COLOR);
|
|
this.cmd("SetForegroundColor", this.codeID[6][2], DPLCS.CODE_STANDARD_COLOR);
|
|
this.cmd("SetForegroundColor", this.codeID[6][4], DPLCS.CODE_STANDARD_COLOR);
|
|
|
|
if (this.tableVals[i][j+1] > this.tableVals[i+1][j])
|
|
{
|
|
this.cmd("SetHighlight", this.tableID[i+1][j], 0);
|
|
this.cmd("SetForegroundColor", this.codeID[6][3], DPLCS.CODE_STANDARD_COLOR);
|
|
|
|
this.tableVals[i+1][j+1] = this.tableVals[i][j+1];
|
|
this.cmd("CreateLabel", moveID, this.tableVals[i][j+1], this.tableXPos[i][j+1], this.tableYPos[i][j+1]);
|
|
|
|
}
|
|
else
|
|
{
|
|
this.cmd("SetForegroundColor", this.codeID[6][1], DPLCS.CODE_STANDARD_COLOR);
|
|
this.cmd("SetHighlight", this.tableID[i][j+1], 0);
|
|
this.tableVals[i+1][j+1] = this.tableVals[i+1][j];
|
|
this.cmd("CreateLabel", moveID, this.tableVals[i+1][j], this.tableXPos[i+1][j], this.tableYPos[i+1][j]);
|
|
}
|
|
this.cmd("Move", moveID, this.tableXPos[i+1][j+1], this.tableYPos[i+1][j+1]);
|
|
this.cmd("Step");
|
|
this.cmd("SetText", this.tableID[i+1][j+1], this.tableVals[i+1][j+1]);
|
|
this.cmd("Delete", moveID);
|
|
if (this.tableVals[i][j+1] > this.tableVals[i+1][j])
|
|
{
|
|
this.cmd("SetForegroundColor", this.codeID[6][1], DPLCS.CODE_STANDARD_COLOR);
|
|
this.cmd("SetHighlight", this.tableID[i][j+1], 0);
|
|
}
|
|
else
|
|
{
|
|
this.cmd("SetForegroundColor", this.codeID[6][3], DPLCS.CODE_STANDARD_COLOR);
|
|
this.cmd("SetHighlight", this.tableID[i+1][j], 0);
|
|
}
|
|
|
|
}
|
|
this.cmd("SetHighlight", this.tableID[i+1][j+1], 0);
|
|
//this.cmd("Step");
|
|
|
|
}
|
|
}
|
|
this.buildLCSFromTable(sequences[0], sequences[1]);
|
|
return this.commands;
|
|
}
|
|
|
|
|
|
|
|
DPLCS.prototype.LCSMem = function(S1, S2, x, y, xPos, ID)
|
|
{
|
|
var ID2 = this.nextIndex++;
|
|
this.cmd("CreateLabel", ID, "LCS(" + S1 + ", " + S2 + ", " + String(x) + ", "+ String(y) + ")", xPos, this.currentY, 0);
|
|
this.cmd("CreateLabel", ID2, " [LCS(" + S1.substring(0,x + 1)+ "," + S2.substring(0,y + 1) + ")]");
|
|
this.cmd("SetForegroundColor", ID2, "#3333FF");
|
|
this.cmd("AlignRight", ID2, ID);
|
|
this.cmd("SetForegroundColor", this.codeID[0][1], DPLCS.CODE_HIGHLIGHT_COLOR);
|
|
this.cmd("Step");
|
|
this.cmd("SetForegroundColor", this.codeID[0][1], DPLCS.CODE_STANDARD_COLOR);
|
|
|
|
if (this.tableVals[x+1][y+1] != -1)
|
|
{
|
|
var movingLabel = this.nextIndex++;
|
|
this.cmd("CreateLabel", movingLabel, this.tableVals[x+1][y+1], this.tableXPos[x+1][y+1], this.tableYPos[x+1][y+1]);
|
|
this.cmd("Move", movingLabel, xPos, this.currentY);
|
|
this.cmd("SetText", ID, "");
|
|
this.cmd("Step");
|
|
this.cmd("Delete", movingLabel);
|
|
|
|
|
|
this.cmd("SetText", ID, this.tableVals[x+1][y+1]);
|
|
this.cmd("Delete", ID2);
|
|
this.cmd("Step");
|
|
return this.tableVals[x+1][y+1];
|
|
}
|
|
|
|
|
|
if (x == -1 || y == -1)
|
|
{
|
|
if (x == -1)
|
|
{
|
|
this.cmd("SetForegroundColor", this.codeID[1][1], DPLCS.CODE_HIGHLIGHT_COLOR);
|
|
|
|
}
|
|
if (y == -1)
|
|
{
|
|
this.cmd("SetForegroundColor", this.codeID[1][3], DPLCS.CODE_HIGHLIGHT_COLOR);
|
|
|
|
}
|
|
this.cmd("Step");
|
|
if (x == -1)
|
|
{
|
|
this.cmd("SetForegroundColor", this.codeID[1][1], DPLCS.CODE_STANDARD_COLOR);
|
|
|
|
}
|
|
if (y == -1)
|
|
{
|
|
this.cmd("SetForegroundColor", this.codeID[1][3], DPLCS.CODE_STANDARD_COLOR);
|
|
}
|
|
this.cmd("SetForegroundColor", this.codeID[2][0], DPLCS.CODE_HIGHLIGHT_COLOR);
|
|
this.cmd("SetText", ID, 0);
|
|
this.cmd("Delete", ID2);
|
|
this.cmd("Step");
|
|
this.cmd("SetForegroundColor", this.codeID[2][0], DPLCS.CODE_STANDARD_COLOR);
|
|
|
|
|
|
var movingLabel = this.nextIndex++;
|
|
this.cmd("CreateLabel", movingLabel,0, xPos, this.currentY);
|
|
this.cmd("Move", movingLabel, this.tableXPos[x+1][y+1], this.tableYPos[x+1][y+1]);
|
|
this.cmd("Step");
|
|
this.cmd("Delete", movingLabel);
|
|
|
|
this.tableVals[x+1][y+1] = 0;
|
|
this.cmd("SetText", this.tableID[x+1][y+1], 0);
|
|
|
|
|
|
return 0;
|
|
}
|
|
this.cmd("SetForegroundColor", this.codeID[3][1], DPLCS.CODE_HIGHLIGHT_COLOR);
|
|
this.cmd("Step");
|
|
this.cmd("SetForegroundColor", this.codeID[3][1], DPLCS.CODE_STANDARD_COLOR);
|
|
|
|
if (S1.charAt(x) == S2.charAt(y))
|
|
{
|
|
|
|
this.cmd("SetForegroundColor", this.codeID[4][1], DPLCS.CODE_HIGHLIGHT_COLOR);
|
|
this.cmd("Step");
|
|
this.cmd("SetForegroundColor", this.codeID[4][1], DPLCS.CODE_STANDARD_COLOR);
|
|
|
|
var nextID = this.nextIndex++;
|
|
this.currentY += DPLCS.RECURSIVE_DELTA_Y;
|
|
var subProb = this.LCSMem(S1, S2, x-1, y-1, xPos + DPLCS.RECURSIVE_DELTA_X, nextID);
|
|
|
|
|
|
this.cmd("SetForegroundColor", this.codeID[4][0], DPLCS.CODE_HIGHLIGHT_COLOR);
|
|
this.cmd("Step");
|
|
this.cmd("SetForegroundColor", this.codeID[4][0], DPLCS.CODE_STANDARD_COLOR);
|
|
|
|
|
|
this.cmd("Delete", nextID);
|
|
this.cmd("SetText", ID, subProb + 1);
|
|
this.cmd("Delete", ID2);
|
|
this.cmd("step");
|
|
this.currentY -= DPLCS.RECURSIVE_DELTA_Y;
|
|
|
|
// TODO: Animate moving value into table here
|
|
|
|
|
|
var movingLabel = this.nextIndex++;
|
|
this.cmd("CreateLabel", movingLabel, subProb + 1, xPos, this.currentY);
|
|
this.cmd("Move", movingLabel, this.tableXPos[x+1][y+1], this.tableYPos[x+1][y+1]);
|
|
this.cmd("Step");
|
|
this.cmd("Delete", movingLabel);
|
|
|
|
|
|
|
|
this.tableVals[x+1][y+1] = subProb + 1;
|
|
this.cmd("SetText", this.tableID[x+1][y+1], subProb + 1);
|
|
|
|
return subProb + 1
|
|
}
|
|
else
|
|
{
|
|
var firstID = this.nextIndex++;
|
|
var secondID = this.nextIndex++;
|
|
this.currentY += DPLCS.RECURSIVE_DELTA_Y;
|
|
this.cmd("SetForegroundColor", this.codeID[6][1], DPLCS.CODE_HIGHLIGHT_COLOR);
|
|
this.cmd("Step");
|
|
this.cmd("SetForegroundColor", this.codeID[6][1], DPLCS.CODE_STANDARD_COLOR);
|
|
|
|
var subProb1 = this.LCSMem(S1, S2, x-1, y, xPos + DPLCS.RECURSIVE_DELTA_X, firstID);
|
|
this.currentY += DPLCS.RECURSIVE_DELTA_Y;
|
|
this.cmd("SetForegroundColor", this.codeID[6][3], DPLCS.CODE_HIGHLIGHT_COLOR);
|
|
this.cmd("Step");
|
|
this.cmd("SetForegroundColor", this.codeID[6][3], DPLCS.CODE_STANDARD_COLOR);
|
|
|
|
var subProb2 = this.LCSMem(S1, S2, x, y-1, xPos + DPLCS.RECURSIVE_DELTA_X, secondID);
|
|
|
|
this.cmd("SetForegroundColor", this.codeID[6][0], DPLCS.CODE_HIGHLIGHT_COLOR);
|
|
this.cmd("SetForegroundColor", this.codeID[6][2], DPLCS.CODE_HIGHLIGHT_COLOR);
|
|
this.cmd("SetForegroundColor", this.codeID[6][4], DPLCS.CODE_HIGHLIGHT_COLOR);
|
|
this.cmd("Step");
|
|
this.cmd("SetForegroundColor", this.codeID[6][0], DPLCS.CODE_STANDARD_COLOR);
|
|
this.cmd("SetForegroundColor", this.codeID[6][2], DPLCS.CODE_STANDARD_COLOR);
|
|
this.cmd("SetForegroundColor", this.codeID[6][4], DPLCS.CODE_STANDARD_COLOR);
|
|
this.cmd("Delete", firstID);
|
|
this.cmd("Delete", secondID);
|
|
this.currentY -= 2*DPLCS.RECURSIVE_DELTA_Y;
|
|
var best = Math.max(subProb1, subProb2);
|
|
this.cmd("SetText", ID, best);
|
|
this.cmd("Delete", ID2);
|
|
|
|
|
|
|
|
var movingLabel = this.nextIndex++;
|
|
this.cmd("CreateLabel", movingLabel, best, xPos, this.currentY);
|
|
this.cmd("Move", movingLabel, this.tableXPos[x+1][y+1], this.tableYPos[x+1][y+1]);
|
|
this.cmd("Step");
|
|
this.cmd("Delete", movingLabel);
|
|
|
|
|
|
|
|
// TODO: Animate moving value into table here
|
|
this.tableVals[x+1][y+1] = best;
|
|
this.cmd("SetText", this.tableID[x+1][y+1], best);
|
|
|
|
|
|
|
|
this.cmd("step");
|
|
return best;
|
|
}
|
|
}
|
|
|
|
|
|
DPLCS.prototype.memoizedLCS = function(value)
|
|
{
|
|
this.commands = [];
|
|
|
|
this.clearOldIDs();
|
|
var sequences=value.split(";");
|
|
|
|
this.buildTable(sequences[0], sequences[1]);
|
|
|
|
|
|
var functionCallID = this.nextIndex++;
|
|
this.currentY = DPLCS.RECURSIVE_START_Y;
|
|
|
|
this.oldIDs.push(functionCallID);
|
|
|
|
|
|
var final = this.LCSMem(sequences[0], sequences[1], sequences[0].length - 1, sequences[1].length - 1, DPLCS.RECURSIVE_START_X, functionCallID);
|
|
|
|
this.cmd("SetText", functionCallID, "LCS(" + sequences[0] + ", " + sequences[1] + ", " + String(sequences[0].length - 1) + ", " + String(sequences[1].length - 1) + ") = " + String(final));
|
|
|
|
|
|
this.buildLCSFromTable(sequences[0], sequences[1]);
|
|
|
|
return this.commands;
|
|
}
|
|
|
|
DPLCS.prototype.enableUI = function(event)
|
|
{
|
|
for (var i = 0; i < this.controls.length; i++)
|
|
{
|
|
this.controls[i].disabled = false;
|
|
}
|
|
|
|
|
|
}
|
|
DPLCS.prototype.disableUI = function(event)
|
|
{
|
|
for (var i = 0; i < this.controls.length; i++)
|
|
{
|
|
this.controls[i].disabled = true;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
var currentAlg;
|
|
|
|
function init()
|
|
{
|
|
var animManag = initCanvas();
|
|
currentAlg = new DPLCS(animManag, canvas.width, canvas.height);
|
|
}
|
|
|
|
|
|
|