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Patch - Merge pull request #2214 from Garneauma/WET-360
gc-featured-link: adding bg color option Patch - Provisional feature - gc-featured-link: adding bg color option
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,88 @@ | ||
| /** | ||
| * @title WET-BOEW Featured link | ||
| * @overview Stylize a featured link | ||
| * @license wet-boew.github.io/wet-boew/License-en.html / wet-boew.github.io/wet-boew/Licence-fr.html | ||
| * @author @garneauma | ||
| */ | ||
| ( function( $, window, wb ) { | ||
| "use strict"; | ||
|
|
||
| var $document = wb.doc, | ||
| componentName = "gc-featured-link", | ||
| selector = ".provisional." + componentName, | ||
| initEvent = "wb-init " + selector, | ||
| white = "#FFFFFF", | ||
| black = "#000000", | ||
| darkgrey = "#333333", | ||
| luminance1, luminance2, | ||
| contrastRatio, | ||
|
|
||
| /** | ||
| * @method init | ||
| * @param {jQuery Event} event Event that triggered the function call | ||
| */ | ||
| init = function( event ) { | ||
|
|
||
| // Start initialization | ||
| // returns DOM object = proceed with init | ||
| // returns undefined = do not proceed with init (e.g., already initialized) | ||
| var elm = wb.init( event, componentName, selector ), | ||
| $elm; | ||
|
|
||
| if ( elm ) { | ||
| var bgColor = elm.dataset.bgColor, | ||
| textColor; | ||
|
|
||
| $elm = $( elm ); | ||
|
|
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| if ( bgColor ) { | ||
| if ( getContrastRatio( white, bgColor ) >= 4.5 ) { | ||
| textColor = white; | ||
| } else if ( getContrastRatio( darkgrey, bgColor ) >= 4.5 ) { | ||
| textColor = darkgrey; | ||
| } else { | ||
| textColor = black; | ||
| } | ||
|
|
||
| elm.style.backgroundColor = bgColor; | ||
| elm.style.color = textColor; | ||
| elm.querySelectorAll( "p, a" ).forEach( e => { | ||
| e.style.color = textColor; | ||
| } ); | ||
| } | ||
|
|
||
| // Identify that initialization has completed | ||
| wb.ready( $elm, componentName ); | ||
| } | ||
| }, | ||
|
|
||
| getContrastRatio = function( color1, color2 ) { | ||
| function getLuminance( color ) { | ||
| var rgb = [ color.substr( 1, 2 ), color.substr( 3, 2 ), color.substr( 5, 2 ) ].map( hex => parseInt( hex, 16 ) / 255 ); | ||
|
|
||
| for ( let i = 0; i < rgb.length; i++ ) { | ||
| if ( rgb[ i ] <= 0.03928 ) { | ||
| rgb[ i ] = rgb[ i ] / 12.92; | ||
| } else { | ||
| rgb[ i ] = Math.pow( ( rgb[ i ] + 0.055 ) / 1.055, 2.4 ); | ||
| } | ||
| } | ||
|
|
||
| return 0.2126 * rgb[ 0 ] + 0.7152 * rgb[ 1 ] + 0.0722 * rgb[ 2 ]; | ||
| } | ||
|
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| luminance1 = getLuminance( color1 ); | ||
| luminance2 = getLuminance( color2 ); | ||
|
|
||
| contrastRatio = ( Math.max( luminance1, luminance2 ) + 0.05 ) / ( Math.min( luminance1, luminance2 ) + 0.05 ); | ||
|
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| return contrastRatio.toFixed( 2 ); | ||
| }; | ||
|
|
||
| // Bind the init event of the plugin | ||
| $document.on( "timerpoke.wb " + initEvent, selector, init ); | ||
|
|
||
| // Add the timer poke to initialize the plugin | ||
| wb.add( selector ); | ||
|
|
||
| } )( jQuery, window, wb ); |