// Copyright 2011 David Galles, University of San Francisco. All rights reserved. // // Redistribution and use in source and binary forms, with or without modification, are // permitted provided that the following conditions are met: // // 1. Redistributions of source code must retain the above copyright notice, this list of // conditions and the following disclaimer. // // 2. Redistributions in binary form must reproduce the above copyright notice, this list // of conditions and the following disclaimer in the documentation and/or other materials // provided with the distribution. // // THIS SOFTWARE IS PROVIDED BY ``AS IS'' AND ANY EXPRESS OR IMPLIED // WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND // FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL OR // CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR // CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON // ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF // ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. // // The views and conclusions contained in the software and documentation are those of the // authors and should not be interpreted as representing official policies, either expressed // or implied, of the University of San Francisco var ARRAY_START_X = 100; var ARRAY_START_Y = 200; var ARRAY_ELEM_WIDTH = 50; var ARRAY_ELEM_HEIGHT = 50; var ARRRAY_ELEMS_PER_LINE = 15; var ARRAY_LINE_SPACING = 130; var TOP_POS_X = 180; var TOP_POS_Y = 100; var TOP_LABEL_X = 130; var TOP_LABEL_Y = 100; var PUSH_LABEL_X = 50; var PUSH_LABEL_Y = 30; var PUSH_ELEMENT_X = 120; var PUSH_ELEMENT_Y = 30; var SIZE = 30; function StackArray(am, w, h) { this.init(am, w, h); } StackArray.prototype = new Algorithm(); StackArray.prototype.constructor = StackArray; StackArray.superclass = Algorithm.prototype; StackArray.prototype.init = function(am, w, h) { StackArray.superclass.init.call(this, am, w, h); this.addControls(); this.nextIndex = 0; this.commands = []; this.setup(); this.initialIndex = this.nextIndex; } StackArray.prototype.addControls = function() { this.controls = []; this.pushField = addControlToAlgorithmBar("Text", ""); this.pushField.onkeydown = this.returnSubmit(this.pushField, this.pushCallback.bind(this), 6); this.pushButton = addControlToAlgorithmBar("Button", "Push"); this.pushButton.onclick = this.pushCallback.bind(this); this.controls.push(this.pushField); this.controls.push(this.pushButton); this.popButton = addControlToAlgorithmBar("Button", "Pop"); this.popButton.onclick = this.popCallback.bind(this); this.controls.push(this.popButton); this.clearButton = addControlToAlgorithmBar("Button", "Clear Stack"); this.clearButton.onclick = this.clearCallback.bind(this); this.controls.push(this.clearButton); } StackArray.prototype.enableUI = function(event) { for (var i = 0; i < this.controls.length; i++) { this.controls[i].disabled = false; } } StackArray.prototype.disableUI = function(event) { for (var i = 0; i < this.controls.length; i++) { this.controls[i].disabled = true; } } StackArray.prototype.setup = function() { this.nextIndex = 0; this.arrayID = new Array(SIZE); this.arrayLabelID = new Array(SIZE); for (var i = 0; i < SIZE; i++) { this.arrayID[i]= this.nextIndex++; this.arrayLabelID[i]= this.nextIndex++; } this.topID = this.nextIndex++; this.topLabelID = this.nextIndex++; this.arrayData = new Array(SIZE); this.top = 0; this.leftoverLabelID = this.nextIndex++; this.commands = new Array(); for (var i = 0; i < SIZE; i++) { var xpos = (i % ARRRAY_ELEMS_PER_LINE) * ARRAY_ELEM_WIDTH + ARRAY_START_X; var ypos = Math.floor(i / ARRRAY_ELEMS_PER_LINE) * ARRAY_LINE_SPACING + ARRAY_START_Y; this.cmd("CreateRectangle", this.arrayID[i],"", ARRAY_ELEM_WIDTH, ARRAY_ELEM_HEIGHT,xpos, ypos); this.cmd("CreateLabel",this.arrayLabelID[i], i, xpos, ypos + ARRAY_ELEM_HEIGHT); this.cmd("SetForegroundColor", this.arrayLabelID[i], "#0000FF"); } this.cmd("CreateLabel", this.topLabelID, "top", TOP_LABEL_X, TOP_LABEL_Y); this.cmd("CreateRectangle", this.topID, 0, ARRAY_ELEM_WIDTH, ARRAY_ELEM_HEIGHT, TOP_POS_X, TOP_POS_Y); this.cmd("CreateLabel", this.leftoverLabelID, "", PUSH_LABEL_X, PUSH_LABEL_Y); this.highlight1ID = this.nextIndex++; this.highlight2ID = this.nextIndex++; this.animationManager.StartNewAnimation(this.commands); this.animationManager.skipForward(); this.animationManager.clearHistory(); } StackArray.prototype.reset = function() { this.top = 0; this.nextIndex = this.initialIndex; } StackArray.prototype.pushCallback = function(event) { if (this.top < SIZE && this.pushField.value != "") { var pushVal = this.pushField.value; this.pushField.value = "" this.implementAction(this.push.bind(this), pushVal); } } StackArray.prototype.popCallback = function(event) { if (this.top > 0) { this.implementAction(this.pop.bind(this), ""); } } StackArray.prototype.clearCallback = function(event) { this.implementAction(this.clearData.bind(this), ""); } StackArray.prototype.clearData = function(ignored) { this.commands = new Array(); this.clearAll(); return this.commands; } StackArray.prototype.push = function(elemToPush) { this.commands = new Array(); var labPushID = this.nextIndex++; var labPushValID = this.nextIndex++; this.arrayData[this.top] = elemToPush; this.cmd("SetText", this.leftoverLabelID, ""); this.cmd("CreateLabel", labPushID, "Pushing Value: ", PUSH_LABEL_X, PUSH_LABEL_Y); this.cmd("CreateLabel", labPushValID,elemToPush, PUSH_ELEMENT_X, PUSH_ELEMENT_Y); this.cmd("Step"); this.cmd("CreateHighlightCircle", this.highlight1ID, "#0000FF", TOP_POS_X, TOP_POS_Y); this.cmd("Step"); var xpos = (this.top % ARRRAY_ELEMS_PER_LINE) * ARRAY_ELEM_WIDTH + ARRAY_START_X; var ypos = Math.floor(this.top / ARRRAY_ELEMS_PER_LINE) * ARRAY_LINE_SPACING + ARRAY_START_Y; this.cmd("Move", this.highlight1ID, xpos, ypos + ARRAY_ELEM_HEIGHT); this.cmd("Step"); this.cmd("Move", labPushValID, xpos, ypos); this.cmd("Step"); this.cmd("Settext", this.arrayID[this.top], elemToPush); this.cmd("Delete", labPushValID); this.cmd("Delete", this.highlight1ID); this.cmd("SetHighlight", this.topID, 1); this.cmd("Step"); this.top = this.top + 1; this.cmd("SetText", this.topID, this.top) this.cmd("Delete", labPushID); this.cmd("Step"); this.cmd("SetHighlight", this.topID, 0); return this.commands; } StackArray.prototype.pop = function(ignored) { this.commands = new Array(); var labPopID = this.nextIndex++; var labPopValID = this.nextIndex++; this.cmd("SetText", this.leftoverLabelID, ""); this.cmd("CreateLabel", labPopID, "Popped Value: ", PUSH_LABEL_X, PUSH_LABEL_Y); this.cmd("SetHighlight", this.topID, 1); this.cmd("Step"); this.top = this.top - 1; this.cmd("SetText", this.topID, this.top) this.cmd("Step"); this.cmd("SetHighlight", this.topID, 0); this.cmd("CreateHighlightCircle", this.highlight1ID, "#0000FF", TOP_POS_X, TOP_POS_Y); this.cmd("Step"); var xpos = (this.top % ARRRAY_ELEMS_PER_LINE) * ARRAY_ELEM_WIDTH + ARRAY_START_X; var ypos = Math.floor(this.top / ARRRAY_ELEMS_PER_LINE) * ARRAY_LINE_SPACING + ARRAY_START_Y; this.cmd("Move", this.highlight1ID, xpos, ypos + ARRAY_ELEM_HEIGHT); this.cmd("Step"); this.cmd("CreateLabel", labPopValID,this.arrayData[this.top], xpos, ypos); this.cmd("Settext", this.arrayID[this.top], ""); this.cmd("Move", labPopValID, PUSH_ELEMENT_X, PUSH_ELEMENT_Y); this.cmd("Step"); this.cmd("Delete", labPopValID) this.cmd("Delete", labPopID); this.cmd("Delete", this.highlight1ID); this.cmd("SetText", this.leftoverLabelID, "Popped Value: " + this.arrayData[this.top]); return this.commands; } StackArray.prototype.clearAll = function() { this.commands = new Array(); for (var i = 0; i < this.top; i++) { this.cmd("SetText", this.arrayID[i], ""); } this.top = 0; this.cmd("SetText", this.topID, "0"); return this.commands; } var currentAlg; function init() { var animManag = initCanvas(); currentAlg = new StackArray(animManag, canvas.width, canvas.height); }