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'use strict'; |
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var objectAssign = require( 'object-assign' ), |
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_ = require( 'underscore' ), |
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ElementStart = { |
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MARGIN: 'MARGIN', |
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ELEMENT: 'ELEMENT', |
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PADDDING: 'PADDING' |
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}, |
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calculateFixedHeaderElementHeight = function ( $fixedHeaderElements ) { |
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return _.reduce( $fixedHeaderElements.get(), function ( offset, element ) { |
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var $elm = $( element ); |
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if ( $elm.is( ':visible' ) ) { |
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offset += $elm.height(); |
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} |
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return offset; |
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}, 0 ); |
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}, |
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calculateElementPadding = function ( $element ) { |
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var matchedElemPadding = $element.css( 'padding-top' ).match( /^(\d+)px$/ ); |
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if ( !matchedElemPadding ) { |
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return 0; |
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} |
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return parseInt( matchedElemPadding[ 1 ] ); |
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}, |
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calculateElementMargin = function ( $element ) { |
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var matchedElemPadding = $element.css( 'margin-top' ).match( /^(\d+)px$/ ); |
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if ( !matchedElemPadding ) { |
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return 0; |
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} |
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return parseInt( matchedElemPadding[ 1 ] ); |
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}, |
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findElementWithLowestOffset = function ( elements ) { |
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return _.reduce( elements, function ( acc, element ) { |
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if ( element.length < 1 ) { |
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return acc; |
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} |
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if ( acc === null ) { |
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return element; |
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} |
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if ( acc.offset().top > element.offset().top ) { |
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return element; |
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} |
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return acc; |
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}, null ); |
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}, |
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/** |
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* |
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* @param {jQuery} $element Element whose offset will be taken |
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* @param {[jQuery]} $fixedHeaderElements Elements whose height will be subtracted from the offset |
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* @param {Object} options |
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* @param {string} options.elementStart |
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* @return {number} |
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*/ |
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calculateElementOffset = function ( $element, $fixedHeaderElements, options ) { |
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options = _.extend( { elementStart: ElementStart.ELEMENT }, options ); |
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var offset = $element.offset().top - calculateFixedHeaderElementHeight( $fixedHeaderElements ); |
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switch ( options.elementStart ) { |
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case ElementStart.PADDDING: |
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return offset + calculateElementPadding( $element ); |
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case ElementStart.MARGIN: |
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return offset - calculateElementMargin( $element); |
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} |
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return offset; |
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}, |
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AnimatedScroller = { |
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fixedHeaderElements: null, |
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scrollTo: function( $element, options ) { |
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$( 'html, body' ).stop( true ).animate( { |
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scrollTop: calculateElementOffset( $element, this.fixedHeaderElements, options ) |
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}, 1000, function () { |
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// Callback after animation |
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// Must change focus! |
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$element.focus(); |
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if ($element.is( ':focus' ) ) { // Checking if the target was focused |
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return false; |
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} else { |
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$element.attr( 'tabindex', '-1' ); // Adding tabindex for elements not focusable |
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$element.focus(); // Set focus again |
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} |
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} ); |
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} |
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}, |
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LinkScroller = { |
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scroller: null, |
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linkIsInsideCompletedSummaryOnSmallScreen: function( link ) { |
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// only the completed fields at the bottom summary are inside a .wrap-field.completed |
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return $( window ).width() < 1200 && $( link ).closest( '.wrap-field.has-longtext.completed .wrap-input' ).length > 0; |
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}, |
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scrollToTarget: function( evt ) { |
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evt.preventDefault(); |
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if ( this.linkIsInsideCompletedSummaryOnSmallScreen( evt.currentTarget ) ) { |
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return; |
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} |
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108
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var target = $( evt.currentTarget.hash ); |
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target = target.length ? target : $( '[name=' + evt.currentTarget.hash.slice( 1 ) + ']' ); |
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if ( target.length > 0 ) { |
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this.scroller.scrollTo( target, { elementStart: ElementStart.PADDDING } ); |
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} |
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} |
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} |
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; |
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116
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117
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module.exports ={ |
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118
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createAnimatedScroller: function ( fixedHeaderElements ) { |
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return objectAssign( Object.create( AnimatedScroller ), { fixedHeaderElements: fixedHeaderElements } ); |
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}, |
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scrollOnSuboptionChange: function( $suboptionInput, $suboptionContainer, scroller ) { |
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$suboptionInput.on( 'change', function ( evt ) { |
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var inputWrapper = $suboptionContainer.find( '.wrap-field input[value=' + evt.target.value + ']' ).parents( '.wrap-field' ), |
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infoText = inputWrapper.find( '.info-text' ), |
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scrollTarget = findElementWithLowestOffset( [ inputWrapper, infoText ] ); |
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if ( scrollTarget !== null ) { |
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scroller.scrollTo( scrollTarget, { elementStart: ElementStart.ELEMENT } ); |
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} |
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} ) |
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}, |
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/** |
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* Ensure smooth scroll to the given anchor links. Make sure to only pass links on the same page that can be scrolled to. |
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* |
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* @param {jQuery} $links |
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* @param {object} scroller |
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*/ |
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addScrollToLinkAnchors: function( $links, scroller ) { |
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var linkScroller = objectAssign( Object.create( LinkScroller ), { scroller: scroller } ); |
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$links.not('[href="#"]') |
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.not('[href="#0"]') |
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.not('.state-overview .wrap-field.completed .wrap-input') |
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.click( linkScroller.scrollToTarget.bind( linkScroller ) ); |
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}, |
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ElementStart: ElementStart, |
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// exposed for testing |
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calculateElementOffset: calculateElementOffset, |
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findElementWithLowestOffset: findElementWithLowestOffset |
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148
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}; |
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149
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wmde /
FundraisingFrontend
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