/** * @author Richard Davey * @copyright 2018 Photon Storm Ltd. * @license {@link https://github.com/photonstorm/phaser/blob/master/license.txt|MIT License} */ var AddToDOM = require('../../../dom/AddToDOM'); var CanvasPool = require('../../../display/canvas/CanvasPool'); var Class = require('../../../utils/Class'); var Components = require('../../components'); var CONST = require('../../../const'); var GameObject = require('../../GameObject'); var GetTextSize = require('../GetTextSize'); var GetValue = require('../../../utils/object/GetValue'); var RemoveFromDOM = require('../../../dom/RemoveFromDOM'); var TextRender = require('./TextRender'); var TextStyle = require('../TextStyle'); /** * @classdesc * [description] * * @class Text * @extends Phaser.GameObjects.GameObject * @memberOf Phaser.GameObjects * @constructor * @since 3.0.0 * * @extends Phaser.GameObjects.Components.Alpha * @extends Phaser.GameObjects.Components.BlendMode * @extends Phaser.GameObjects.Components.ComputedSize * @extends Phaser.GameObjects.Components.Depth * @extends Phaser.GameObjects.Components.Flip * @extends Phaser.GameObjects.Components.GetBounds * @extends Phaser.GameObjects.Components.Origin * @extends Phaser.GameObjects.Components.Pipeline * @extends Phaser.GameObjects.Components.ScaleMode * @extends Phaser.GameObjects.Components.ScrollFactor * @extends Phaser.GameObjects.Components.Tint * @extends Phaser.GameObjects.Components.Transform * @extends Phaser.GameObjects.Components.Visible * * @param {Phaser.Scene} scene - The Scene to which this Game Object belongs. A Game Object can only belong to one Scene at a time. * @param {number} x - The horizontal position of this Game Object in the world. * @param {number} y - The vertical position of this Game Object in the world. * @param {(string|string[])} text - The text this Text object will display. * @param {object} style - The text style configuration object. */ var Text = new Class({ Extends: GameObject, Mixins: [ Components.Alpha, Components.BlendMode, Components.ComputedSize, Components.Depth, Components.Flip, Components.GetBounds, Components.Origin, Components.Pipeline, Components.ScaleMode, Components.ScrollFactor, Components.Tint, Components.Transform, Components.Visible, TextRender ], initialize: function Text (scene, x, y, text, style) { if (x === undefined) { x = 0; } if (y === undefined) { y = 0; } GameObject.call(this, scene, 'Text'); this.setPosition(x, y); this.setOrigin(0, 0); this.initPipeline('TextureTintPipeline'); /** * The canvas element that the text is rendered to. * * @name Phaser.GameObjects.Text#canvas * @type {HTMLCanvasElement} * @since 3.0.0 */ this.canvas = CanvasPool.create(this); /** * The context of the canvas element that the text is rendered to. * * @name Phaser.GameObjects.Text#context * @type {CanvasRenderingContext2D} * @since 3.0.0 */ this.context = this.canvas.getContext('2d'); /** * [description] * * @name Phaser.GameObjects.Text#style * @type {Phaser.GameObjects.Text.TextStyle} * @since 3.0.0 */ this.style = new TextStyle(this, style); /** * [description] * * @name Phaser.GameObjects.Text#autoRound * @type {boolean} * @default true * @since 3.0.0 */ this.autoRound = true; /** * The Regular Expression that is used to split the text up into lines, in * multi-line text. By default this is `/(?:\r\n|\r|\n)/`. * You can change this RegExp to be anything else that you may need. * * @name Phaser.GameObjects.Text#splitRegExp * @type {object} * @since 3.0.0 */ this.splitRegExp = /(?:\r\n|\r|\n)/; /** * [description] * * @name Phaser.GameObjects.Text#text * @type {string} * @since 3.0.0 */ this.text = ''; /** * [description] * * @name Phaser.GameObjects.Text#resolution * @type {number} * @default 1 * @since 3.0.0 */ this.resolution = 1; /** * Specify a padding value which is added to the line width and height when calculating the Text size. * Allows you to add extra spacing if the browser is unable to accurately determine the true font dimensions. * * @name Phaser.GameObjects.Text#padding * @type {{left:number,right:number,top:number,bottom:number}} * @since 3.0.0 */ this.padding = { left: 0, right: 0, top: 0, bottom: 0 }; /** * [description] * * @name Phaser.GameObjects.Text#width * @type {number} * @default 1 * @since 3.0.0 */ this.width = 1; /** * [description] * * @name Phaser.GameObjects.Text#height * @type {number} * @default 1 * @since 3.0.0 */ this.height = 1; /** * [description] * * @name Phaser.GameObjects.Text#canvasTexture * @type {HTMLCanvasElement} * @default null * @since 3.0.0 */ this.canvasTexture = null; /** * [description] * * @name Phaser.GameObjects.Text#dirty * @type {boolean} * @default false * @since 3.0.0 */ this.dirty = false; this.initRTL(); if (style && style.padding) { this.setPadding(style.padding); } if (style && style.lineSpacing) { this._lineSpacing = style.lineSpacing; } this.setText(text); if (scene.sys.game.config.renderType === CONST.WEBGL) { scene.sys.game.renderer.onContextRestored(function () { this.canvasTexture = null; this.dirty = true; }, this); } }, /** * [description] * * @method Phaser.GameObjects.Text#initRTL * @since 3.0.0 */ initRTL: function () { if (!this.style.rtl) { return; } // Here is where the crazy starts. // // Due to browser implementation issues, you cannot fillText BiDi text to a canvas // that is not part of the DOM. It just completely ignores the direction property. this.canvas.dir = 'rtl'; // Experimental atm, but one day ... this.context.direction = 'rtl'; // Add it to the DOM, but hidden within the parent canvas. this.canvas.style.display = 'none'; AddToDOM(this.canvas, this.scene.sys.canvas); // And finally we set the x origin this.originX = 1; }, /** * Greedy wrapping algorithm that will wrap words as the line grows longer than its horizontal * bounds. * * @method Phaser.GameObjects.Text#runWordWrap * @since 3.0.0 * * @param {string} text - The text to perform word wrap detection against. * * @return {string} The text after wrapping has been applied. */ runWordWrap: function (text) { var style = this.style; if (style.wordWrapCallback) { var wrappedLines = style.wordWrapCallback.call(style.wordWrapCallbackScope, text, this); if (Array.isArray(wrappedLines)) { wrappedLines = wrappedLines.join('\n'); } return wrappedLines; } else if (style.wordWrapWidth) { if (style.wordWrapUseAdvanced) { return this.advancedWordWrap(text, this.context, this.style.wordWrapWidth); } else { return this.basicWordWrap(text, this.context, this.style.wordWrapWidth); } } else { return text; } }, /** * Advanced wrapping algorithm that will wrap words as the line grows longer than its horizontal * bounds. Consecutive spaces will be collapsed and replaced with a single space. Lines will be * trimmed of white space before processing. Throws an error if wordWrapWidth is less than a * single character. * * @method Phaser.GameObjects.Text#advancedWordWrap * @since 3.0.0 * * @param {string} text - The text to perform word wrap detection against. * @param {CanvasRenderingContext2D} context - [description] * @param {number} wordWrapWidth - [description] * * @return {string} The wrapped text. */ advancedWordWrap: function (text, context, wordWrapWidth) { var output = ''; // Condense consecutive spaces and split into lines var lines = text .replace(/ +/gi, ' ') .split(this.splitRegExp); var linesCount = lines.length; for (var i = 0; i < linesCount; i++) { var line = lines[i]; var out = ''; // Trim whitespace line = line.replace(/^ *|\s*$/gi, ''); // If entire line is less than wordWrapWidth append the entire line and exit early var lineWidth = context.measureText(line).width; if (lineWidth < wordWrapWidth) { output += line + '\n'; continue; } // Otherwise, calculate new lines var currentLineWidth = wordWrapWidth; // Split into words var words = line.split(' '); for (var j = 0; j < words.length; j++) { var word = words[j]; var wordWithSpace = word + ' '; var wordWidth = context.measureText(wordWithSpace).width; if (wordWidth > currentLineWidth) { // Break word if (j === 0) { // Shave off letters from word until it's small enough var newWord = wordWithSpace; while (newWord.length) { newWord = newWord.slice(0, -1); wordWidth = context.measureText(newWord).width; if (wordWidth <= currentLineWidth) { break; } } // If wordWrapWidth is too small for even a single letter, shame user // failure with a fatal error if (!newWord.length) { throw new Error('This text\'s wordWrapWidth setting is less than a single character!'); } // Replace current word in array with remainder var secondPart = word.substr(newWord.length); words[j] = secondPart; // Append first piece to output out += newWord; } // If existing word length is 0, don't include it var offset = (words[j].length) ? j : j + 1; // Collapse rest of sentence and remove any trailing white space var remainder = words.slice(offset).join(' ') .replace(/[ \n]*$/gi, ''); // Prepend remainder to next line lines[i + 1] = remainder + ' ' + (lines[i + 1] || ''); linesCount = lines.length; break; // Processing on this line // Append word with space to output } else { out += wordWithSpace; currentLineWidth -= wordWidth; } } // Append processed line to output output += out.replace(/[ \n]*$/gi, '') + '\n'; } // Trim the end of the string output = output.replace(/[\s|\n]*$/gi, ''); return output; }, /** * Greedy wrapping algorithm that will wrap words as the line grows longer than its horizontal * bounds. Spaces are not collapsed and whitespace is not trimmed. * * @method Phaser.GameObjects.Text#basicWordWrap * @since 3.0.0 * * @param {string} text - The text to perform word wrap detection against. * @param {CanvasRenderingContext2D} context - [description] * @param {number} wordWrapWidth - [description] * * @return {string} The wrapped text. */ basicWordWrap: function (text, context, wordWrapWidth) { var result = ''; var lines = text.split(this.splitRegExp); for (var i = 0; i < lines.length; i++) { var spaceLeft = wordWrapWidth; var words = lines[i].split(' '); for (var j = 0; j < words.length; j++) { var wordWidth = context.measureText(words[j]).width; var wordWidthWithSpace = wordWidth + context.measureText(' ').width; if (wordWidthWithSpace > spaceLeft) { // Skip printing the newline if it's the first word of the line that is greater // than the word wrap width. if (j > 0) { result += '\n'; } result += words[j] + ' '; spaceLeft = wordWrapWidth - wordWidth; } else { spaceLeft -= wordWidthWithSpace; result += words[j] + ' '; } } if (i < lines.length - 1) { result += '\n'; } } return result; }, /** * Runs the given text through this Text objects word wrapping and returns the results as an * array, where each element of the array corresponds to a wrapped line of text. * * @method Phaser.GameObjects.Text#getWrappedText * @since 3.0.0 * * @param {string} text - The text for which the wrapping will be calculated. If unspecified, the Text objects current text will be used. * * @return {string[]} An array of strings with the pieces of wrapped text. */ getWrappedText: function (text) { if (text === undefined) { text = this.text; } this.style.syncFont(this.canvas, this.context); var wrappedLines = this.runWordWrap(text); return wrappedLines.split(this.splitRegExp); }, /** * [description] * * @method Phaser.GameObjects.Text#setText * @since 3.0.0 * * @param {(string|string[])} value - The string, or array of strings, to be set as the content of this Text object. * * @return {Phaser.GameObjects.Text} This Text object. */ setText: function (value) { if (!value && value !== 0) { value = ''; } if (Array.isArray(value)) { value = value.join('\n'); } if (value !== this.text) { this.text = value.toString(); this.updateText(); } return this; }, /** * [description] * * @method Phaser.GameObjects.Text#setStyle * @since 3.0.0 * * @param {object} style - [description] * * @return {Phaser.GameObjects.Text} This Text object. */ setStyle: function (style) { return this.style.setStyle(style); }, /** * [description] * * @method Phaser.GameObjects.Text#setFont * @since 3.0.0 * * @param {string} font - [description] * * @return {Phaser.GameObjects.Text} This Text object. */ setFont: function (font) { return this.style.setFont(font); }, /** * [description] * * @method Phaser.GameObjects.Text#setFontFamily * @since 3.0.0 * * @param {string} family - [description] * * @return {Phaser.GameObjects.Text} This Text object. */ setFontFamily: function (family) { return this.style.setFontFamily(family); }, /** * [description] * * @method Phaser.GameObjects.Text#setFontSize * @since 3.0.0 * * @param {number} size - [description] * * @return {Phaser.GameObjects.Text} This Text object. */ setFontSize: function (size) { return this.style.setFontSize(size); }, /** * [description] * * @method Phaser.GameObjects.Text#setFontStyle * @since 3.0.0 * * @param {string} style - [description] * * @return {Phaser.GameObjects.Text} This Text object. */ setFontStyle: function (style) { return this.style.setFontStyle(style); }, /** * [description] * * @method Phaser.GameObjects.Text#setFixedSize * @since 3.0.0 * * @param {number} width - [description] * @param {number} height - [description] * * @return {Phaser.GameObjects.Text} This Text object. */ setFixedSize: function (width, height) { return this.style.setFixedSize(width, height); }, /** * [description] * * @method Phaser.GameObjects.Text#setBackgroundColor * @since 3.0.0 * * @param {string} color - [description] * * @return {Phaser.GameObjects.Text} This Text object. */ setBackgroundColor: function (color) { return this.style.setBackgroundColor(color); }, /** * [description] * * @method Phaser.GameObjects.Text#setFill * @since 3.0.0 * * @param {string} color - [description] * * @return {Phaser.GameObjects.Text} This Text object. */ setFill: function (color) { return this.style.setFill(color); }, /** * [description] * * @method Phaser.GameObjects.Text#setColor * @since 3.0.0 * * @param {string} color - [description] * * @return {Phaser.GameObjects.Text} This Text object. */ setColor: function (color) { return this.style.setColor(color); }, /** * [description] * * @method Phaser.GameObjects.Text#setStroke * @since 3.0.0 * * @param {string} color - [description] * @param {number} thickness - [description] * * @return {Phaser.GameObjects.Text} This Text object. */ setStroke: function (color, thickness) { return this.style.setStroke(color, thickness); }, /** * [description] * * @method Phaser.GameObjects.Text#setShadow * @since 3.0.0 * * @param {number} x - [description] * @param {number} y - [description] * @param {string} color - [description] * @param {number} blur - [description] * @param {boolean} shadowStroke - [description] * @param {boolean} shadowFill - [description] * * @return {Phaser.GameObjects.Text} This Text object. */ setShadow: function (x, y, color, blur, shadowStroke, shadowFill) { return this.style.setShadow(x, y, color, blur, shadowStroke, shadowFill); }, /** * [description] * * @method Phaser.GameObjects.Text#setShadowOffset * @since 3.0.0 * * @param {number} x - [description] * @param {number} y - [description] * * @return {Phaser.GameObjects.Text} This Text object. */ setShadowOffset: function (x, y) { return this.style.setShadowOffset(x, y); }, /** * [description] * * @method Phaser.GameObjects.Text#setShadowColor * @since 3.0.0 * * @param {string} color - [description] * * @return {Phaser.GameObjects.Text} This Text object. */ setShadowColor: function (color) { return this.style.setShadowColor(color); }, /** * [description] * * @method Phaser.GameObjects.Text#setShadowBlur * @since 3.0.0 * * @param {number} blur - [description] * * @return {Phaser.GameObjects.Text} This Text object. */ setShadowBlur: function (blur) { return this.style.setShadowBlur(blur); }, /** * [description] * * @method Phaser.GameObjects.Text#setShadowStroke * @since 3.0.0 * * @param {boolean} enabled - [description] * * @return {Phaser.GameObjects.Text} This Text object. */ setShadowStroke: function (enabled) { return this.style.setShadowStroke(enabled); }, /** * [description] * * @method Phaser.GameObjects.Text#setShadowFill * @since 3.0.0 * * @param {boolean} enabled - [description] * * @return {Phaser.GameObjects.Text} This Text object. */ setShadowFill: function (enabled) { return this.style.setShadowFill(enabled); }, /** * Set the width (in pixels) to use for wrapping lines. Pass in null to remove wrapping by width. * * @method Phaser.GameObjects.Text#setWordWrapWidth * @since 3.0.0 * * @param {?number} width - The maximum width of a line in pixels. Set to null to remove wrapping. * @param {boolean} [useAdvancedWrap=false] - Whether or not to use the advanced wrapping * algorithm. If true, spaces are collapsed and whitespace is trimmed from lines. If false, * spaces and whitespace are left as is. * * @return {Phaser.GameObjects.Text} This Text object. */ setWordWrapWidth: function (width, useAdvancedWrap) { return this.style.setWordWrapWidth(width, useAdvancedWrap); }, /** * Set a custom callback for wrapping lines. Pass in null to remove wrapping by callback. * * @method Phaser.GameObjects.Text#setWordWrapCallback * @since 3.0.0 * * @param {TextStyleWordWrapCallback} callback - A custom function that will be responsible for wrapping the * text. It will receive two arguments: text (the string to wrap), textObject (this Text * instance). It should return the wrapped lines either as an array of lines or as a string with * newline characters in place to indicate where breaks should happen. * @param {object} [scope=null] - The scope that will be applied when the callback is invoked. * * @return {Phaser.GameObjects.Text} This Text object. */ setWordWrapCallback: function (callback, scope) { return this.style.setWordWrapCallback(callback, scope); }, /** * [description] * * @method Phaser.GameObjects.Text#setAlign * @since 3.0.0 * * @param {string} align - [description] * * @return {Phaser.GameObjects.Text} This Text object. */ setAlign: function (align) { return this.style.setAlign(align); }, /** * 'left' can be an object. * If only 'left' and 'top' are given they are treated as 'x' and 'y' * * @method Phaser.GameObjects.Text#setPadding * @since 3.0.0 * * @param {(number|object)} left - [description] * @param {number} top - [description] * @param {number} right - [description] * @param {number} bottom - [description] * * @return {Phaser.GameObjects.Text} This Text object. */ setPadding: function (left, top, right, bottom) { if (typeof left === 'object') { var config = left; // If they specify x and/or y this applies to all var x = GetValue(config, 'x', null); if (x !== null) { left = x; right = x; } else { left = GetValue(config, 'left', 0); right = GetValue(config, 'right', left); } var y = GetValue(config, 'y', null); if (y !== null) { top = y; bottom = y; } else { top = GetValue(config, 'top', 0); bottom = GetValue(config, 'bottom', top); } } else { if (left === undefined) { left = 0; } if (top === undefined) { top = left; } if (right === undefined) { right = left; } if (bottom === undefined) { bottom = top; } } this.padding.left = left; this.padding.top = top; this.padding.right = right; this.padding.bottom = bottom; return this.updateText(); }, /** * [description] * * @method Phaser.GameObjects.Text#setMaxLines * @since 3.0.0 * * @param {integer} [max=0] - [description] * * @return {Phaser.GameObjects.Text} This Text object. */ setMaxLines: function (max) { return this.style.setMaxLines(max); }, /** * [description] * * @method Phaser.GameObjects.Text#updateText * @since 3.0.0 * * @return {Phaser.GameObjects.Text} This Text object. */ updateText: function () { var canvas = this.canvas; var context = this.context; var style = this.style; var resolution = this.resolution; var size = style.metrics; style.syncFont(canvas, context); var outputText = this.text; if (style.wordWrapWidth || style.wordWrapCallback) { outputText = this.runWordWrap(this.text); } // Split text into lines var lines = outputText.split(this.splitRegExp); var textSize = GetTextSize(this, size, lines); var padding = this.padding; var w = textSize.width + padding.left + padding.right; var h = textSize.height + padding.top + padding.bottom; if (style.fixedWidth === 0) { this.width = w; } if (style.fixedHeight === 0) { this.height = h; } this.updateDisplayOrigin(); w *= resolution; h *= resolution; w = Math.max(w, 1); h = Math.max(h, 1); if (canvas.width !== w || canvas.height !== h) { canvas.width = w; canvas.height = h; style.syncFont(canvas, context); // Resizing resets the context } else { context.clearRect(0, 0, w, h); } context.save(); // context.scale(resolution, resolution); if (style.backgroundColor) { context.fillStyle = style.backgroundColor; context.fillRect(0, 0, w, h); } style.syncStyle(canvas, context); context.textBaseline = 'alphabetic'; // Apply padding context.translate(padding.left, padding.top); var linePositionX; var linePositionY; // Draw text line by line for (var i = 0; i < textSize.lines; i++) { linePositionX = style.strokeThickness / 2; linePositionY = (style.strokeThickness / 2 + i * textSize.lineHeight) + size.ascent; if (i > 0) { linePositionY += (textSize.lineSpacing * i); } if (style.rtl) { linePositionX = w - linePositionX; } else if (style.align === 'right') { linePositionX += textSize.width - textSize.lineWidths[i]; } else if (style.align === 'center') { linePositionX += (textSize.width - textSize.lineWidths[i]) / 2; } if (this.autoRound) { linePositionX = Math.round(linePositionX); linePositionY = Math.round(linePositionY); } if (style.strokeThickness) { this.style.syncShadow(context, style.shadowStroke); context.strokeText(lines[i], linePositionX, linePositionY); } if (style.color) { this.style.syncShadow(context, style.shadowFill); context.fillText(lines[i], linePositionX, linePositionY); } } context.restore(); this.dirty = true; return this; }, /** * [description] * * @method Phaser.GameObjects.Text#getTextMetrics * @since 3.0.0 * * @return {object} [description] */ getTextMetrics: function () { return this.style.getTextMetrics(); }, /** * [description] * * @method Phaser.GameObjects.Text#toJSON * @since 3.0.0 * * @return {object} [description] */ toJSON: function () { var out = Components.ToJSON(this); // Extra Text data is added here var data = { autoRound: this.autoRound, text: this.text, style: this.style.toJSON(), resolution: this.resolution, padding: { left: this.padding.left, right: this.padding.right, top: this.padding.top, bottom: this.padding.bottom } }; out.data = data; return out; }, /** * [description] * * @method Phaser.GameObjects.Text#preDestroy * @since 3.0.0 */ preDestroy: function () { if (this.style.rtl) { RemoveFromDOM(this.canvas); } CanvasPool.remove(this.canvas); } }); module.exports = Text;