118 lines
2.6 KiB
JavaScript
118 lines
2.6 KiB
JavaScript
/**
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* Common classes and constants.
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*/
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goog.provide('ascii');
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/** @const */ var MAX_GRID_SIZE = 1000;
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/** @const */ var SPECIAL_VALUE = '+';
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/** @const */ var SPECIAL_LINE_H = '\u2014';
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/** @const */ var SPECIAL_LINE_V = '|';
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/** @const */ var DRAG_LATENCY = 130; // Milliseconds.
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/** @const */ var DRAG_ACCURACY = 3; // Pixels.
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/** @const */ var CHARACTER_PIXELS = 15;
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/** @const */ var RENDER_PADDING = 70;
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/**
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* Stores a 2D vector.
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*
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* @constructor
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* @param {number} x
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* @param {number} y
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*/
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ascii.Vector = function(x, y) {
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/** type {Number} */ this.x = x;
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/** type {Number} */ this.y = y;
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};
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/**
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* @param {ascii.Vector} other
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* @return {boolean}
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*/
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ascii.Vector.prototype.equals = function(other) {
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return (other != null) && (this.x == other.x) && (this.y == other.y);
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};
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/**
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* @param {ascii.Vector} other
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* @return {ascii.Vector}
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*/
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ascii.Vector.prototype.subtract = function(other) {
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return new ascii.Vector(this.x - other.x, this.y - other.y);
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};
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/**
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* @param {ascii.Vector} other
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* @return {ascii.Vector}
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*/
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ascii.Vector.prototype.add = function(other) {
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return new ascii.Vector(this.x + other.x, this.y + other.y);
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};
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/**
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* @return {ascii.Vector}
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*/
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ascii.Vector.prototype.clone = function() {
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return new ascii.Vector(this.x, this.y);
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};
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/** @return {number} */
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ascii.Vector.prototype.length = function() {
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return Math.sqrt(this.x * this.x + this.y * this.y);
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};
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/**
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* @param {number} scale
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* @return {ascii.Vector}
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*/
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ascii.Vector.prototype.scale = function(scale) {
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return new ascii.Vector(this.x * scale, this.y * scale);
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};
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/**
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* An individual cell within the diagram and it's current value.
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*
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* @constructor
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*/
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ascii.Cell = function() {
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/** @type {?string} */ this.value = null;
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/** @type {?string} */ this.scratchValue = null;
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};
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/** @return {?string} */
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ascii.Cell.prototype.getRawValue = function() {
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return (this.scratchValue != null ? this.scratchValue : this.value);
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};
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/** @return {boolean} */
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ascii.Cell.prototype.isSpecial = function() {
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return this.getRawValue() == SPECIAL_VALUE;
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};
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/**
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* The context for a cell, i.e. the status of the cells around it.
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*
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* @param {boolean} left
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* @param {boolean} right
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* @param {boolean} up
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* @param {boolean} down
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* @constructor
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*/
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ascii.CellContext = function(left, right, up, down) {
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/** @type {boolean} */ this.left = left;
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/** @type {boolean} */ this.right = right;
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/** @type {boolean} */ this.up = up;
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/** @type {boolean} */ this.down = down;
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};
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/**
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* Returns the total number of surrounding special cells.
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* @return {number}
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*/
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ascii.CellContext.prototype.sum = function() {
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return this.left + this.right + this.up + this.down;
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};
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