270 lines
8.2 KiB
JavaScript
270 lines
8.2 KiB
JavaScript
/**
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* Alpha Color Picker JS
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*
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* This file includes several helper functions and the core control JS.
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*/
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/**
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* Override the stock color.js toString() method to add support for
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* outputting RGBa or Hex.
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*/
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Color.prototype.toString = function ( flag ) {
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// If our no-alpha flag has been passed in, output RGBa value with 100% opacity.
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// This is used to set the background color on the opacity slider during color changes.
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if ( 'no-alpha' == flag ) {
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return this.toCSS( 'rgba', '1' ).replace( /\s+/g, '' );
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}
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// If we have a proper opacity value, output RGBa.
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if ( 1 > this._alpha ) {
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return this.toCSS( 'rgba', this._alpha ).replace( /\s+/g, '' );
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}
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// Proceed with stock color.js hex output.
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var hex = parseInt( this._color, 10 ).toString( 16 );
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if ( this.error ) {
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return '';
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}
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if ( hex.length < 6 ) {
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for ( var i = 6 - hex.length - 1; i >= 0; i-- ) {
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hex = '0' + hex;
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}
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}
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return '#' + hex;
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};
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/**
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* Given an RGBa, RGB, or hex color value, return the alpha channel value.
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*/
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function acp_get_alpha_value_from_color( value ) {
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var alphaVal;
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// Remove all spaces from the passed in value to help our RGBa regex.
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value = value.replace( / /g, '' );
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if ( value.match( /rgba\(\d+\,\d+\,\d+\,([^\)]+)\)/ ) ) {
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alphaVal = parseFloat( value.match( /rgba\(\d+\,\d+\,\d+\,([^\)]+)\)/)[1] ).toFixed( 2 ) * 100;
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alphaVal = parseInt( alphaVal );
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} else {
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alphaVal = 100;
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}
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return alphaVal;
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}
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/**
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* Force update the alpha value of the color picker object and maybe the alpha slider.
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*/
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function acp_update_alpha_value_on_color_control( alpha, $control, $alphaSlider, update_slider ) {
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var iris, colorPicker, color;
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iris = $control.data( 'a8cIris' );
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colorPicker = $control.data( 'wpWpColorPicker' );
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// Set the alpha value on the Iris object.
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iris._color._alpha = alpha;
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// Store the new color value.
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color = iris._color.toString();
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// Set the value of the input.
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$control.val( color );
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// Update the background color of the color picker.
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colorPicker.toggler.css( {
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'background-color': color
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} );
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// Maybe update the alpha slider itself.
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if ( update_slider ) {
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acp_update_alpha_value_on_alpha_slider( alpha, $alphaSlider );
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}
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// Update the color value of the color picker object.
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$control.wpColorPicker( 'color', color );
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}
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/**
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* Update the slider handle position and label.
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*/
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function acp_update_alpha_value_on_alpha_slider( alpha, $alphaSlider ) {
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$alphaSlider.slider( 'value', alpha );
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$alphaSlider.find( '.ui-slider-handle' ).text( alpha.toString() );
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}
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/**
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* Initialization trigger.
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*/
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jQuery( document ).ready( function ( $ ) {
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// Loop over each control and transform it into our color picker.
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$( '.alpha-color-control' ).each( function () {
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// Scope the vars.
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var $control, startingColor, paletteInput, showOpacity, defaultColor, palette,
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colorPickerOptions, $container, $alphaSlider, alphaVal, sliderOptions;
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// Store the control instance.
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$control = $( this );
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// Get a clean starting value for the option.
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startingColor = $control.val().replace( /\s+/g, '' );
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// Get some data off the control.
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paletteInput = $control.attr( 'data-palette' );
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showOpacity = $control.attr( 'data-show-opacity' );
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defaultColor = $control.attr( 'data-default-color' );
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// Process the palette.
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if ( -1 !== paletteInput.indexOf( '|' ) ) {
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palette = paletteInput.split( '|' );
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} else if ( 'false' == paletteInput ) {
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palette = false;
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} else {
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palette = true;
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}
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// Set up the options that we'll pass to wpColorPicker().
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colorPickerOptions = {
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change: function ( event, ui ) {
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var key, value, alpha, $transparency;
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key = $control.attr( 'data-customize-setting-link' );
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value = $control.wpColorPicker( 'color' );
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// Set the opacity value on the slider handle when the default color button is clicked.
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if ( defaultColor == value ) {
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alpha = acp_get_alpha_value_from_color( value );
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$alphaSlider.find( '.ui-slider-handle' ).text( alpha );
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}
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// Send ajax request to wp.customize to trigger the Save action.
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wp.customize(key, function ( obj ) {
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obj.set( value );
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});
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$transparency = $container.find( '.transparency' );
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// Always show the background color of the opacity slider at 100% opacity.
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$transparency.css( 'background-color', ui.color.toString( 'no-alpha' ) );
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},
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palettes: palette // Use the passed in palette.
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};
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// Create the colorpicker.
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$control.wpColorPicker( colorPickerOptions );
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$container = $control.parents( '.wp-picker-container:first' );
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// Insert our opacity slider.
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$('<div class="alpha-color-picker-container">' +
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'<div class="min-click-zone click-zone"></div>' +
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'<div class="max-click-zone click-zone"></div>' +
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'<div class="alpha-slider"></div>' +
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'<div class="transparency"></div>' +
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'</div>').appendTo($container.find( '.wp-picker-holder' ) );
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$alphaSlider = $container.find( '.alpha-slider' );
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// If starting value is in format RGBa, grab the alpha channel.
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alphaVal = acp_get_alpha_value_from_color( startingColor );
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// Set up jQuery UI slider() options.
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sliderOptions = {
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create: function ( event, ui ) {
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var value = $(this).slider( 'value' );
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// Set up initial values.
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$( this ).find( '.ui-slider-handle' ).text( value );
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$( this ).siblings( '.transparency' ).css( 'background-color', startingColor );
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},
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value: alphaVal,
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range: 'max',
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step: 1,
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min: 0,
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max: 100,
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animate: 300
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};
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// Initialize jQuery UI slider with our options.
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$alphaSlider.slider( sliderOptions );
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// Maybe show the opacity on the handle.
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if ( 'true' === showOpacity ) {
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$alphaSlider.find( '.ui-slider-handle' ).addClass( 'show-opacity' );
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}
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// Bind event handlers for the click zones.
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$container.find( '.min-click-zone' ).on( 'click', function () {
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acp_update_alpha_value_on_color_control( 0, $control, $alphaSlider, true );
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} );
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$container.find( '.max-click-zone').on( 'click', function () {
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acp_update_alpha_value_on_color_control( 100, $control, $alphaSlider, true );
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} );
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// Bind event handler for clicking on a palette color.
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$container.find( '.iris-palette' ).on( 'click', function () {
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var color, alpha;
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color = $( this ).css( 'background-color' );
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alpha = acp_get_alpha_value_from_color( color );
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acp_update_alpha_value_on_alpha_slider( alpha, $alphaSlider );
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// Sometimes Iris doesn't set a perfect background-color on the palette,
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// for example rgba(20, 80, 100, 0.3) becomes rgba(20, 80, 100, 0.298039).
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// To compensante for this we round the opacity value on RGBa colors here
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// and save it a second time to the color picker object.
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if ( alpha != 100 ) {
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color = color.replace( /[^,]+(?=\))/, ( alpha / 100 ).toFixed( 2 ) );
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}
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$control.wpColorPicker( 'color', color );
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});
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// Bind event handler for clicking on the 'Clear' button.
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$container.find( '.button.wp-picker-clear' ).on( 'click', function () {
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var key = $control.attr( 'data-customize-setting-link' );
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// The #fff color is delibrate here. This sets the color picker to white instead of the
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// defult black, which puts the color picker in a better place to visually represent empty.
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$control.wpColorPicker('color', '#ffffff');
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// Set the actual option value to empty string.
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wp.customize( key, function ( obj ) {
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obj.set( '' );
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} );
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acp_update_alpha_value_on_alpha_slider( 100, $alphaSlider );
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} );
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// Bind event handler for clicking on the 'Default' button.
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$container.find( '.button.wp-picker-default' ).on( 'click', function () {
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var alpha = acp_get_alpha_value_from_color( defaultColor );
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acp_update_alpha_value_on_alpha_slider( alpha, $alphaSlider );
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} );
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// Bind event handler for typing or pasting into the input.
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$control.on( 'input', function () {
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var value = $( this ).val();
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var alpha = acp_get_alpha_value_from_color( value );
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acp_update_alpha_value_on_alpha_slider( alpha, $alphaSlider );
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} );
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// Update all the things when the slider is interacted with.
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$alphaSlider.slider().on( 'slide', function ( event, ui ) {
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var alpha = parseFloat( ui.value ) / 100.0;
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acp_update_alpha_value_on_color_control( alpha, $control, $alphaSlider, false );
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// Change value shown on slider handle.
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$( this ).find( '.ui-slider-handle').text( ui.value );
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});
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} );
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} );
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