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<!DOCTYPE html>
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<title>Phaser Source: gameobjects/Text.js</title>
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<h1 class="page-title">Source: gameobjects/Text.js</h1>
<section>
<article>
<pre class="sunlight-highlight-javascript linenums">/**
* @author Richard Davey <[email protected]>
* @copyright 2014 Photon Storm Ltd.
* @license {@link https://github.com/photonstorm/phaser/blob/master/license.txt|MIT License}
*/
/**
* Create a new `Text` object. This uses a local hidden Canvas object and renders the type into it. It then makes a texture from this for renderning to the view.
* Because of this you can only display fonts that are currently loaded and available to the browser. It won't load the fonts for you.
* Here is a compatibility table showing the available default fonts across different mobile browsers: http://www.jordanm.co.uk/tinytype
*
* @class Phaser.Text
* @extends PIXI.Text
* @constructor
* @param {Phaser.Game} game - Current game instance.
* @param {number} x - X position of the new text object.
* @param {number} y - Y position of the new text object.
* @param {string} text - The actual text that will be written.
* @param {object} style - The style object containing style attributes like font, font size ,
*/
Phaser.Text = function (game, x, y, text, style) {
x = x || 0;
y = y || 0;
text = text || ' ';
style = style || {};
if (text.length === 0)
{
text = ' ';
}
else
{
text = text.toString();
}
/**
* @property {Phaser.Game} game - A reference to the currently running Game.
*/
this.game = game;
/**
* @property {boolean} exists - If exists = false then the Text isn't updated by the core game loop.
* @default
*/
this.exists = true;
/**
* @property {string} name - The user defined name given to this object.
* @default
*/
this.name = '';
/**
* @property {number} type - The const type of this object.
* @default
*/
this.type = Phaser.TEXT;
/**
* @property {number} z - The z-depth value of this object within its Group (remember the World is a Group as well). No two objects in a Group can have the same z value.
*/
this.z = 0;
/**
* @property {Phaser.Point} world - The world coordinates of this Sprite. This differs from the x/y coordinates which are relative to the Sprites container.
*/
this.world = new Phaser.Point(x, y);
/**
* @property {string} _text - Internal cache var.
* @private
*/
this._text = text;
/**
* @property {string} _font - Internal cache var.
* @private
*/
this._font = '';
/**
* @property {number} _fontSize - Internal cache var.
* @private
*/
this._fontSize = 32;
/**
* @property {string} _fontWeight - Internal cache var.
* @private
*/
this._fontWeight = 'normal';
/**
* @property {number} lineSpacing - Additional spacing (in pixels) between each line of text if multi-line.
* @private
*/
this._lineSpacing = 0;
/**
* @property {Phaser.Events} events - The Events you can subscribe to that are dispatched when certain things happen on this Sprite or its components.
*/
this.events = new Phaser.Events(this);
/**
* @property {Phaser.InputHandler|null} input - The Input Handler for this object. Needs to be enabled with image.inputEnabled = true before you can use it.
*/
this.input = null;
/**
* @property {Phaser.Point} cameraOffset - If this object is fixedToCamera then this stores the x/y offset that its drawn at, from the top-left of the camera view.
*/
this.cameraOffset = new Phaser.Point();
this.setStyle(style);
PIXI.Text.call(this, text, this.style);
this.position.set(x, y);
/**
* A small internal cache:
* 0 = previous position.x
* 1 = previous position.y
* 2 = previous rotation
* 3 = renderID
* 4 = fresh? (0 = no, 1 = yes)
* 5 = outOfBoundsFired (0 = no, 1 = yes)
* 6 = exists (0 = no, 1 = yes)
* 7 = fixed to camera (0 = no, 1 = yes)
* 8 = destroy phase? (0 = no, 1 = yes)
* @property {Array} _cache
* @private
*/
this._cache = [ 0, 0, 0, 0, 1, 0, 1, 0, 0 ];
};
Phaser.Text.prototype = Object.create(PIXI.Text.prototype);
Phaser.Text.prototype.constructor = Phaser.Text;
/**
* Automatically called by World.preUpdate.
* @method Phaser.Text.prototype.preUpdate
*/
Phaser.Text.prototype.preUpdate = function () {
this._cache[0] = this.world.x;
this._cache[1] = this.world.y;
this._cache[2] = this.rotation;
if (!this.exists || !this.parent.exists)
{
this.renderOrderID = -1;
return false;
}
if (this.autoCull)
{
// Won't get rendered but will still get its transform updated
this.renderable = this.game.world.camera.screenView.intersects(this.getBounds());
}
this.world.setTo(this.game.camera.x + this.worldTransform[2], this.game.camera.y + this.worldTransform[5]);
if (this.visible)
{
this._cache[3] = this.game.stage.currentRenderOrderID++;
}
// Update any Children
for (var i = 0, len = this.children.length; i < len; i++)
{
this.children[i].preUpdate();
}
return true;
};
/**
* Override and use this function in your own custom objects to handle any update requirements you may have.
*
* @method Phaser.Text#update
* @memberof Phaser.Text
*/
Phaser.Text.prototype.update = function() {
};
/**
* Automatically called by World.postUpdate.
* @method Phaser.Text.prototype.postUpdate
*/
Phaser.Text.prototype.postUpdate = function () {
if (this._cache[7] === 1)
{
this.position.x = (this.game.camera.view.x + this.cameraOffset.x) / this.game.camera.scale.x;
this.position.y = (this.game.camera.view.y + this.cameraOffset.y) / this.game.camera.scale.y;
}
// Update any Children
for (var i = 0, len = this.children.length; i < len; i++)
{
this.children[i].postUpdate();
}
};
/**
* @method Phaser.Text.prototype.destroy
* @param {boolean} [destroyChildren=true] - Should every child of this object have its destroy method called?
*/
Phaser.Text.prototype.destroy = function (destroyChildren) {
if (this.game === null || this.destroyPhase) { return; }
if (typeof destroyChildren === 'undefined') { destroyChildren = true; }
this._cache[8] = 1;
if (this.parent)
{
if (this.parent instanceof Phaser.Group)
{
this.parent.remove(this);
}
else
{
this.parent.removeChild(this);
}
}
this.texture.destroy();
if (this.canvas.parentNode)
{
this.canvas.parentNode.removeChild(this.canvas);
}
else
{
this.canvas = null;
this.context = null;
}
var i = this.children.length;
if (destroyChildren)
{
while (i--)
{
this.children[i].destroy(destroyChildren);
}
}
else
{
while (i--)
{
this.removeChild(this.children[i]);
}
}
this.exists = false;
this.visible = false;
this.filters = null;
this.mask = null;
this.game = null;
this._cache[8] = 0;
};
/**
* @method Phaser.Text.prototype.setShadow
* @param {number} [x=0] - The shadowOffsetX value in pixels. This is how far offset horizontally the shadow effect will be.
* @param {number} [y=0] - The shadowOffsetY value in pixels. This is how far offset vertically the shadow effect will be.
* @param {string} [color='rgba(0,0,0,0)'] - The color of the shadow, as given in CSS rgba format. Set the alpha component to 0 to disable the shadow.
* @param {number} [blur=0] - The shadowBlur value. Make the shadow softer by applying a Gaussian blur to it. A number from 0 (no blur) up to approx. 10 (depending on scene).
*/
Phaser.Text.prototype.setShadow = function (x, y, color, blur) {
this.style.shadowOffsetX = x || 0;
this.style.shadowOffsetY = y || 0;
this.style.shadowColor = color || 'rgba(0,0,0,0)';
this.style.shadowBlur = blur || 0;
this.dirty = true;
};
/**
* Set the style of the text by passing a single style object to it.
*
* @method Phaser.Text.prototype.setStyle
* @param [style] {Object} The style parameters
* @param [style.font='bold 20pt Arial'] {String} The style and size of the font
* @param [style.fill='black'] {Object} A canvas fillstyle that will be used on the text eg 'red', '#00FF00'
* @param [style.align='left'] {String} Alignment for multiline text ('left', 'center' or 'right'), does not affect single line text
* @param [style.stroke='black'] {String} A canvas fillstyle that will be used on the text stroke eg 'blue', '#FCFF00'
* @param [style.strokeThickness=0] {Number} A number that represents the thickness of the stroke. Default is 0 (no stroke)
* @param [style.wordWrap=false] {Boolean} Indicates if word wrap should be used
* @param [style.wordWrapWidth=100] {Number} The width at which text will wrap
*/
Phaser.Text.prototype.setStyle = function (style) {
style = style || {};
style.font = style.font || 'bold 20pt Arial';
style.fill = style.fill || 'black';
style.align = style.align || 'left';
style.stroke = style.stroke || 'black'; //provide a default, see: https://github.com/GoodBoyDigital/pixi.js/issues/136
style.strokeThickness = style.strokeThickness || 0;
style.wordWrap = style.wordWrap || false;
style.wordWrapWidth = style.wordWrapWidth || 100;
style.shadowOffsetX = style.shadowOffsetX || 0;
style.shadowOffsetY = style.shadowOffsetY || 0;
style.shadowColor = style.shadowColor || 'rgba(0,0,0,0)';
style.shadowBlur = style.shadowBlur || 0;
this.style = style;
this.dirty = true;
};
/**
* Renders text. This replaces the Pixi.Text.updateText function as we need a few extra bits in here.
*
* @method Phaser.Text.prototype.updateText
* @private
*/
Phaser.Text.prototype.updateText = function () {
this.context.font = this.style.font;
var outputText = this.text;
// word wrap
// preserve original text
if (this.style.wordWrap)
{
outputText = this.runWordWrap(this.text);
}
//split text into lines
var lines = outputText.split(/(?:\r\n|\r|\n)/);
//calculate text width
var lineWidths = [];
var maxLineWidth = 0;
for (var i = 0; i < lines.length; i++)
{
var lineWidth = this.context.measureText(lines[i]).width;
lineWidths[i] = lineWidth;
maxLineWidth = Math.max(maxLineWidth, lineWidth);
}
this.canvas.width = maxLineWidth + this.style.strokeThickness;
//calculate text height
var lineHeight = this.determineFontHeight('font: ' + this.style.font + ';') + this.style.strokeThickness + this._lineSpacing + this.style.shadowOffsetY;
this.canvas.height = lineHeight * lines.length;
if (navigator.isCocoonJS)
{
this.context.clearRect(0, 0, this.canvas.width, this.canvas.height);
}
//set canvas text styles
this.context.fillStyle = this.style.fill;
this.context.font = this.style.font;
this.context.strokeStyle = this.style.stroke;
this.context.lineWidth = this.style.strokeThickness;
this.context.shadowOffsetX = this.style.shadowOffsetX;
this.context.shadowOffsetY = this.style.shadowOffsetY;
this.context.shadowColor = this.style.shadowColor;
this.context.shadowBlur = this.style.shadowBlur;
this.context.textBaseline = 'top';
this.context.lineCap = 'round';
this.context.lineJoin = 'round';
//draw lines line by line
for (i = 0; i < lines.length; i++)
{
var linePosition = new PIXI.Point(this.style.strokeThickness / 2, this.style.strokeThickness / 2 + i * lineHeight);
if (this.style.align === 'right')
{
linePosition.x += maxLineWidth - lineWidths[i];
}
else if (this.style.align === 'center')
{
linePosition.x += (maxLineWidth - lineWidths[i]) / 2;
}
linePosition.y += this._lineSpacing;
if (this.style.stroke && this.style.strokeThickness)
{
this.context.strokeText(lines[i], linePosition.x, linePosition.y);
}
if (this.style.fill)
{
this.context.fillText(lines[i], linePosition.x, linePosition.y);
}
}
this.updateTexture();
};
/**
* Greedy wrapping algorithm that will wrap words as the line grows longer than its horizontal bounds.
*
* @method Phaser.Text.prototype.runWordWrap
* @private
*/
Phaser.Text.prototype.runWordWrap = function (text) {
var result = '';
var lines = text.split('\n');
for (var i = 0; i < lines.length; i++)
{
var spaceLeft = this.style.wordWrapWidth;
var words = lines[i].split(' ');
for (var j = 0; j < words.length; j++)
{
var wordWidth = this.context.measureText(words[j]).width;
var wordWidthWithSpace = wordWidth + this.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 = this.style.wordWrapWidth - wordWidth;
}
else
{
spaceLeft -= wordWidthWithSpace;
result += words[j] + ' ';
}
}
if (i < lines.length-1)
{
result += '\n';
}
}
return result;
};
/**
* Indicates the rotation of the Text, in degrees, from its original orientation. Values from 0 to 180 represent clockwise rotation; values from 0 to -180 represent counterclockwise rotation.
* Values outside this range are added to or subtracted from 360 to obtain a value within the range. For example, the statement player.angle = 450 is the same as player.angle = 90.
* If you wish to work in radians instead of degrees use the property Sprite.rotation instead.
* @name Phaser.Text#angle
* @property {number} angle - Gets or sets the angle of rotation in degrees.
*/
Object.defineProperty(Phaser.Text.prototype, 'angle', {
get: function() {
return Phaser.Math.radToDeg(this.rotation);
},
set: function(value) {
this.rotation = Phaser.Math.degToRad(value);