// disabling eslint for now, going to rewrite this in v5
/* eslint-disable */
import { TEXT_GRADIENT } from '../const';
import { hex2string } from '../utils';
const defaultStyle = {
align: 'left',
breakWords: false,
dropShadow: false,
dropShadowAlpha: 1,
dropShadowAngle: Math.PI / 6,
dropShadowBlur: 0,
dropShadowColor: 'black',
dropShadowDistance: 5,
fill: 'black',
fillGradientType: TEXT_GRADIENT.LINEAR_VERTICAL,
fillGradientStops: [],
fontFamily: 'Arial',
fontSize: 26,
fontStyle: 'normal',
fontVariant: 'normal',
fontWeight: 'normal',
letterSpacing: 0,
lineHeight: 0,
lineJoin: 'miter',
miterLimit: 10,
padding: 0,
stroke: 'black',
strokeThickness: 0,
textBaseline: 'alphabetic',
trim: false,
wordWrap: false,
wordWrapWidth: 100,
leading: 0,
};
/**
* A TextStyle Object decorates a Text Object. It can be shared between
* multiple Text objects. Changing the style will update all text objects using it.
*
* @class
* @memberof PIXI
*/
export default class TextStyle
{
/**
* @param {object} [style] - The style parameters
* @param {string} [style.align='left'] - Alignment for multiline text ('left', 'center' or 'right'),
* does not affect single line text
* @param {boolean} [style.breakWords=false] - Indicates if lines can be wrapped within words, it
* needs wordWrap to be set to true
* @param {boolean} [style.dropShadow=false] - Set a drop shadow for the text
* @param {number} [style.dropShadowAlpha=1] - Set alpha for the drop shadow
* @param {number} [style.dropShadowAngle=Math.PI/6] - Set a angle of the drop shadow
* @param {number} [style.dropShadowBlur=0] - Set a shadow blur radius
* @param {string|number} [style.dropShadowColor='black'] - A fill style to be used on the dropshadow e.g 'red', '#00FF00'
* @param {number} [style.dropShadowDistance=5] - Set a distance of the drop shadow
* @param {string|string[]|number|number[]|CanvasGradient|CanvasPattern} [style.fill='black'] - A canvas
* fillstyle that will be used on the text e.g 'red', '#00FF00'. Can be an array to create a gradient
* eg ['#000000','#FFFFFF']
* {@link https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/fillStyle|MDN}
* @param {number} [style.fillGradientType=PIXI.TEXT_GRADIENT.LINEAR_VERTICAL] - If fill is an array of colours
* to create a gradient, this can change the type/direction of the gradient. See {@link PIXI.TEXT_GRADIENT}
* @param {number[]} [style.fillGradientStops] - If fill is an array of colours to create a gradient, this array can set
* the stop points (numbers between 0 and 1) for the color, overriding the default behaviour of evenly spacing them.
* @param {string|string[]} [style.fontFamily='Arial'] - The font family
* @param {number|string} [style.fontSize=26] - The font size (as a number it converts to px, but as a string,
* equivalents are '26px','20pt','160%' or '1.6em')
* @param {string} [style.fontStyle='normal'] - The font style ('normal', 'italic' or 'oblique')
* @param {string} [style.fontVariant='normal'] - The font variant ('normal' or 'small-caps')
* @param {string} [style.fontWeight='normal'] - The font weight ('normal', 'bold', 'bolder', 'lighter' and '100',
* '200', '300', '400', '500', '600', '700', 800' or '900')
* @param {number} [style.leading=0] - The space between lines
* @param {number} [style.letterSpacing=0] - The amount of spacing between letters, default is 0
* @param {number} [style.lineHeight] - The line height, a number that represents the vertical space that a letter uses
* @param {string} [style.lineJoin='miter'] - The lineJoin property sets the type of corner created, it can resolve
* spiked text issues. Default is 'miter' (creates a sharp corner).
* @param {number} [style.miterLimit=10] - The miter limit to use when using the 'miter' lineJoin mode. This can reduce
* or increase the spikiness of rendered text.
* @param {number} [style.padding=0] - Occasionally some fonts are cropped. Adding some padding will prevent this from
* happening by adding padding to all sides of the text.
* @param {string|number} [style.stroke='black'] - A canvas fillstyle that will be used on the text stroke
* e.g 'blue', '#FCFF00'
* @param {number} [style.strokeThickness=0] - A number that represents the thickness of the stroke.
* Default is 0 (no stroke)
* @param {boolean} [style.trim=false] - Trim transparent borders
* @param {string} [style.textBaseline='alphabetic'] - The baseline of the text that is rendered.
* @param {boolean} [style.wordWrap=false] - Indicates if word wrap should be used
* @param {number} [style.wordWrapWidth=100] - The width at which text will wrap, it needs wordWrap to be set to true
*/
constructor(style)
{
this.styleID = 0;
Object.assign(this, defaultStyle, style);
}
/**
* Creates a new TextStyle object with the same values as this one.
* Note that the only the properties of the object are cloned.
*
* @return {PIXI.TextStyle} New cloned TextStyle object
*/
clone()
{
const clonedProperties = {};
for (const key in defaultStyle)
{
clonedProperties[key] = this[key];
}
return new TextStyle(clonedProperties);
}
/**
* Resets all properties to the defaults specified in TextStyle.prototype._default
*/
reset()
{
Object.assign(this, defaultStyle);
}
/**
* Alignment for multiline text ('left', 'center' or 'right'), does not affect single line text
*
* @member {string}
*/
get align()
{
return this._align;
}
set align(align) // eslint-disable-line require-jsdoc
{
if (this._align !== align)
{
this._align = align;
this.styleID++;
}
}
/**
* Indicates if lines can be wrapped within words, it needs wordWrap to be set to true
*
* @member {boolean}
*/
get breakWords()
{
return this._breakWords;
}
set breakWords(breakWords) // eslint-disable-line require-jsdoc
{
if (this._breakWords !== breakWords)
{
this._breakWords = breakWords;
this.styleID++;
}
}
/**
* Set a drop shadow for the text
*
* @member {boolean}
*/
get dropShadow()
{
return this._dropShadow;
}
set dropShadow(dropShadow) // eslint-disable-line require-jsdoc
{
if (this._dropShadow !== dropShadow)
{
this._dropShadow = dropShadow;
this.styleID++;
}
}
/**
* Set alpha for the drop shadow
*
* @member {number}
*/
get dropShadowAlpha()
{
return this._dropShadowAlpha;
}
set dropShadowAlpha(dropShadowAlpha) // eslint-disable-line require-jsdoc
{
if (this._dropShadowAlpha !== dropShadowAlpha)
{
this._dropShadowAlpha = dropShadowAlpha;
this.styleID++;
}
}
/**
* Set a angle of the drop shadow
*
* @member {number}
*/
get dropShadowAngle()
{
return this._dropShadowAngle;
}
set dropShadowAngle(dropShadowAngle) // eslint-disable-line require-jsdoc
{
if (this._dropShadowAngle !== dropShadowAngle)
{
this._dropShadowAngle = dropShadowAngle;
this.styleID++;
}
}
/**
* Set a shadow blur radius
*
* @member {number}
*/
get dropShadowBlur()
{
return this._dropShadowBlur;
}
set dropShadowBlur(dropShadowBlur) // eslint-disable-line require-jsdoc
{
if (this._dropShadowBlur !== dropShadowBlur)
{
this._dropShadowBlur = dropShadowBlur;
this.styleID++;
}
}
/**
* A fill style to be used on the dropshadow e.g 'red', '#00FF00'
*
* @member {string|number}
*/
get dropShadowColor()
{
return this._dropShadowColor;
}
set dropShadowColor(dropShadowColor) // eslint-disable-line require-jsdoc
{
const outputColor = getColor(dropShadowColor);
if (this._dropShadowColor !== outputColor)
{
this._dropShadowColor = outputColor;
this.styleID++;
}
}
/**
* Set a distance of the drop shadow
*
* @member {number}
*/
get dropShadowDistance()
{
return this._dropShadowDistance;
}
set dropShadowDistance(dropShadowDistance) // eslint-disable-line require-jsdoc
{
if (this._dropShadowDistance !== dropShadowDistance)
{
this._dropShadowDistance = dropShadowDistance;
this.styleID++;
}
}
/**
* A canvas fillstyle that will be used on the text e.g 'red', '#00FF00'.
* Can be an array to create a gradient eg ['#000000','#FFFFFF']
* {@link https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/fillStyle|MDN}
*
* @member {string|string[]|number|number[]|CanvasGradient|CanvasPattern}
*/
get fill()
{
return this._fill;
}
set fill(fill) // eslint-disable-line require-jsdoc
{
const outputColor = getColor(fill);
if (this._fill !== outputColor)
{
this._fill = outputColor;
this.styleID++;
}
}
/**
* If fill is an array of colours to create a gradient, this can change the type/direction of the gradient.
* See {@link PIXI.TEXT_GRADIENT}
*
* @member {number}
*/
get fillGradientType()
{
return this._fillGradientType;
}
set fillGradientType(fillGradientType) // eslint-disable-line require-jsdoc
{
if (this._fillGradientType !== fillGradientType)
{
this._fillGradientType = fillGradientType;
this.styleID++;
}
}
/**
* If fill is an array of colours to create a gradient, this array can set the stop points
* (numbers between 0 and 1) for the color, overriding the default behaviour of evenly spacing them.
*
* @member {number[]}
*/
get fillGradientStops()
{
return this._fillGradientStops;
}
set fillGradientStops(fillGradientStops) // eslint-disable-line require-jsdoc
{
if (!areArraysEqual(this._fillGradientStops,fillGradientStops))
{
this._fillGradientStops = fillGradientStops;
this.styleID++;
}
}
/**
* The font family
*
* @member {string|string[]}
*/
get fontFamily()
{
return this._fontFamily;
}
set fontFamily(fontFamily) // eslint-disable-line require-jsdoc
{
if (this.fontFamily !== fontFamily)
{
this._fontFamily = fontFamily;
this.styleID++;
}
}
/**
* The font size
* (as a number it converts to px, but as a string, equivalents are '26px','20pt','160%' or '1.6em')
*
* @member {number|string}
*/
get fontSize()
{
return this._fontSize;
}
set fontSize(fontSize) // eslint-disable-line require-jsdoc
{
if (this._fontSize !== fontSize)
{
this._fontSize = fontSize;
this.styleID++;
}
}
/**
* The font style
* ('normal', 'italic' or 'oblique')
*
* @member {string}
*/
get fontStyle()
{
return this._fontStyle;
}
set fontStyle(fontStyle) // eslint-disable-line require-jsdoc
{
if (this._fontStyle !== fontStyle)
{
this._fontStyle = fontStyle;
this.styleID++;
}
}
/**
* The font variant
* ('normal' or 'small-caps')
*
* @member {string}
*/
get fontVariant()
{
return this._fontVariant;
}
set fontVariant(fontVariant) // eslint-disable-line require-jsdoc
{
if (this._fontVariant !== fontVariant)
{
this._fontVariant = fontVariant;
this.styleID++;
}
}
/**
* The font weight
* ('normal', 'bold', 'bolder', 'lighter' and '100', '200', '300', '400', '500', '600', '700', 800' or '900')
*
* @member {string}
*/
get fontWeight()
{
return this._fontWeight;
}
set fontWeight(fontWeight) // eslint-disable-line require-jsdoc
{
if (this._fontWeight !== fontWeight)
{
this._fontWeight = fontWeight;
this.styleID++;
}
}
/**
* The amount of spacing between letters, default is 0
*
* @member {number}
*/
get letterSpacing()
{
return this._letterSpacing;
}
set letterSpacing(letterSpacing) // eslint-disable-line require-jsdoc
{
if (this._letterSpacing !== letterSpacing)
{
this._letterSpacing = letterSpacing;
this.styleID++;
}
}
/**
* The line height, a number that represents the vertical space that a letter uses
*
* @member {number}
*/
get lineHeight()
{
return this._lineHeight;
}
set lineHeight(lineHeight) // eslint-disable-line require-jsdoc
{
if (this._lineHeight !== lineHeight)
{
this._lineHeight = lineHeight;
this.styleID++;
}
}
/**
* The space between lines
*
* @member {number}
*/
get leading()
{
return this._leading;
}
set leading(leading) // eslint-disable-line require-jsdoc
{
if (this._leading !== leading)
{
this._leading = leading;
this.styleID++;
}
}
/**
* The lineJoin property sets the type of corner created, it can resolve spiked text issues.
* Default is 'miter' (creates a sharp corner).
*
* @member {string}
*/
get lineJoin()
{
return this._lineJoin;
}
set lineJoin(lineJoin) // eslint-disable-line require-jsdoc
{
if (this._lineJoin !== lineJoin)
{
this._lineJoin = lineJoin;
this.styleID++;
}
}
/**
* The miter limit to use when using the 'miter' lineJoin mode
* This can reduce or increase the spikiness of rendered text.
*
* @member {number}
*/
get miterLimit()
{
return this._miterLimit;
}
set miterLimit(miterLimit) // eslint-disable-line require-jsdoc
{
if (this._miterLimit !== miterLimit)
{
this._miterLimit = miterLimit;
this.styleID++;
}
}
/**
* Occasionally some fonts are cropped. Adding some padding will prevent this from happening
* by adding padding to all sides of the text.
*
* @member {number}
*/
get padding()
{
return this._padding;
}
set padding(padding) // eslint-disable-line require-jsdoc
{
if (this._padding !== padding)
{
this._padding = padding;
this.styleID++;
}
}
/**
* A canvas fillstyle that will be used on the text stroke
* e.g 'blue', '#FCFF00'
*
* @member {string|number}
*/
get stroke()
{
return this._stroke;
}
set stroke(stroke) // eslint-disable-line require-jsdoc
{
const outputColor = getColor(stroke);
if (this._stroke !== outputColor)
{
this._stroke = outputColor;
this.styleID++;
}
}
/**
* A number that represents the thickness of the stroke.
* Default is 0 (no stroke)
*
* @member {number}
*/
get strokeThickness()
{
return this._strokeThickness;
}
set strokeThickness(strokeThickness) // eslint-disable-line require-jsdoc
{
if (this._strokeThickness !== strokeThickness)
{
this._strokeThickness = strokeThickness;
this.styleID++;
}
}
/**
* The baseline of the text that is rendered.
*
* @member {string}
*/
get textBaseline()
{
return this._textBaseline;
}
set textBaseline(textBaseline) // eslint-disable-line require-jsdoc
{
if (this._textBaseline !== textBaseline)
{
this._textBaseline = textBaseline;
this.styleID++;
}
}
/**
* Trim transparent borders
*
* @member {boolean}
*/
get trim()
{
return this._trim;
}
set trim(trim) // eslint-disable-line require-jsdoc
{
if (this._trim !== trim)
{
this._trim = trim;
this.styleID++;
}
}
/**
* Indicates if word wrap should be used
*
* @member {boolean}
*/
get wordWrap()
{
return this._wordWrap;
}
set wordWrap(wordWrap) // eslint-disable-line require-jsdoc
{
if (this._wordWrap !== wordWrap)
{
this._wordWrap = wordWrap;
this.styleID++;
}
}
/**
* The width at which text will wrap, it needs wordWrap to be set to true
*
* @member {number}
*/
get wordWrapWidth()
{
return this._wordWrapWidth;
}
set wordWrapWidth(wordWrapWidth) // eslint-disable-line require-jsdoc
{
if (this._wordWrapWidth !== wordWrapWidth)
{
this._wordWrapWidth = wordWrapWidth;
this.styleID++;
}
}
/**
* Generates a font style string to use for `TextMetrics.measureFont()`.
*
* @return {string} Font style string, for passing to `TextMetrics.measureFont()`
*/
toFontString()
{
// build canvas api font setting from individual components. Convert a numeric this.fontSize to px
const fontSizeString = (typeof this.fontSize === 'number') ? `${this.fontSize}px` : this.fontSize;
// Clean-up fontFamily property by quoting each font name
// this will support font names with spaces
let fontFamilies = this.fontFamily;
if (!Array.isArray(this.fontFamily))
{
fontFamilies = this.fontFamily.split(',');
}
for (let i = fontFamilies.length - 1; i >= 0; i--)
{
// Trim any extra white-space
let fontFamily = fontFamilies[i].trim();
// Check if font already contains strings
if (!(/([\"\'])[^\'\"]+\1/).test(fontFamily))
{
fontFamily = `"${fontFamily}"`;
}
fontFamilies[i] = fontFamily;
}
return `${this.fontStyle} ${this.fontVariant} ${this.fontWeight} ${fontSizeString} ${fontFamilies.join(',')}`;
}
}
/**
* Utility function to convert hexadecimal colors to strings, and simply return the color if it's a string.
*
* @param {number|number[]} color
* @return {string} The color as a string.
*/
function getSingleColor(color)
{
if (typeof color === 'number')
{
return hex2string(color);
}
else if ( typeof color === 'string' )
{
if ( color.indexOf('0x') === 0 )
{
color = color.replace('0x', '#');
}
}
return color;
}
/**
* Utility function to convert hexadecimal colors to strings, and simply return the color if it's a string.
* This version can also convert array of colors
*
* @param {number|number[]} color
* @return {string} The color as a string.
*/
function getColor(color)
{
if (!Array.isArray(color))
{
return getSingleColor(color);
}
else
{
for (let i = 0; i < color.length; ++i)
{
color[i] = getSingleColor(color[i]);
}
return color;
}
}
/**
* Utility function to convert hexadecimal colors to strings, and simply return the color if it's a string.
* This version can also convert array of colors
*
* @param {Array} array1 First array to compare
* @param {Array} array2 Second array to compare
* @return {boolean} Do the arrays contain the same values in the same order
*/
function areArraysEqual(array1, array2)
{
if (!Array.isArray(array1) || !Array.isArray(array2))
{
return false;
}
if (array1.length !== array2.length)
{
return false;
}
for (let i = 0; i < array1.length; ++i)
{
if (array1[i] !== array2[i])
{
return false;
}
}
return true;
}
