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<?php |
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|
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if ( ! defined( 'ABSPATH' ) ) { |
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exit; |
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} |
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|
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require_once 'inc/simple_html_dom.php'; |
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|
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// include option |
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|
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require_once 'inc/options.php'; |
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|
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function wya11y_process_html_with_dom( $html, $callback ) { |
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$dom = lhb_str_get_html( $html, false, true, 'UTF-8', false, PHP_EOL, ' ' ); |
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|
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if ( empty( $dom ) ) { |
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return $html; |
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} |
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|
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$callback( $dom ); |
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|
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$html = $dom->save(); |
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return $html; |
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} |
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|
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// Name: Form elements do not have associated labels |
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function easywpstuff_assesplus_check_input_labels( $html ) { |
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return wya11y_process_html_with_dom( |
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$html, |
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function( $dom ) { |
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$inputs = $dom->find( 'input' ); |
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|
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foreach ( $inputs as $input ) { |
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$parent = $input->parent(); |
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$previousSibling = $input->previousSibling(); |
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$nextSibling = $input->nextSibling(); |
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|
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// Check if label is a sibling and has the 'for' attribute matching input's 'id' |
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if ( |
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( $previousSibling && $previousSibling->tag === 'label' && $previousSibling->getAttribute( 'for' ) === $input->getAttribute( 'id' ) ) || |
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( $nextSibling && $nextSibling->tag === 'label' && $nextSibling->getAttribute( 'for' ) === $input->getAttribute( 'id' ) ) || |
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( $parent && $parent->tag === 'label' && $parent->getAttribute( 'for' ) === $input->getAttribute( 'id' ) ) |
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) { |
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continue; // Skip if label with 'for' attribute is found |
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} |
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|
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// Check if no descriptive attributes and not in a labeled context |
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if ( ! $input->getAttribute( 'placeholder' ) || ! $input->getAttribute( 'aria-label' ) || ! $input->getAttribute( 'aria-labelledby' ) ) { |
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$inputType = $input->getAttribute( 'type' ); |
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|
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// Check if input type is not hidden, button, or submit |
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if ( $inputType && ! in_array( $inputType, array( 'hidden', 'button', 'submit' ) ) ) { |
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$input->setAttribute( 'aria-label', $inputType ); |
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} |
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} |
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} |
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} |
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); |
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} |
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function wya11y_has_non_empty_text_content( $element ) { |
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$textContent = $element->plaintext; |
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return $textContent !== '' && trim( $textContent ) !== ''; // Check if it's not empty or consists only of whitespace |
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} |
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// Links do not have a discernible name |
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function easywpstuff_assesplus_add_aria_labels_to_links( $html ) { |
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$html = str_replace( '</img>', '', $html ); |
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$html = str_replace( '</source>', '', $html ); |
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|
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return wya11y_process_html_with_dom( |
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$html, |
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function( $dom ) { |
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$links = $dom->find( 'a' ); |
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|
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foreach ( $links as $link ) { |
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$hasTextContent = false; |
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$hasImageWithNonBlankAlt = false; |
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|
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// Check if link or its child elements have text content |
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if ( wya11y_has_non_empty_text_content( $link ) ) { |
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$hasTextContent = true; |
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} else { |
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foreach ( $link->find( '*' ) as $element ) { |
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if ( wya11y_has_non_empty_text_content( $element ) ) { |
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$hasTextContent = true; |
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break; |
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} |
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} |
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} |
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|
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// Check if link lacks text content or child with text content, and aria-label attributes |
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if ( ! $hasTextContent && ! $link->getAttribute( 'aria-label' ) && ! $link->getAttribute( 'aria-labelledby' ) ) { |
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foreach ( $link->find( 'img' ) as $imgElement ) { |
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if ( trim( $imgElement->getAttribute( 'alt' ) ) ) { |
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$hasImageWithNonBlankAlt = true; |
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break; |
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} |
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} |
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|
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// Exclude links with image children having non-blank alt attribute |
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if ( ! $hasImageWithNonBlankAlt ) { |
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$link->setAttribute( 'aria-label', 'link' ); |
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} |
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} |
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} |
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} |
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); |
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} |
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|
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|
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//Buttons do not have an accessible name |
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|
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function easywpstuff_assesplus_add_aria_labels_to_buttons( $html ) { |
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|
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return wya11y_process_html_with_dom( |
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$html, |
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function( $dom ) { |
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$buttons = $dom->find( 'button' ); |
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foreach ( $buttons as $button ) { |
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if ( ! trim( $button->plaintext ) && ! $button->getattribute( 'aria-label' ) ) { |
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$child_elements = $button->find( '*' ); |
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if ( empty( $child_elements ) ) { |
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$button->setattribute( 'aria-label', 'button' ); |
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} else { |
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$button->setattribute( 'aria-label', 'button' ); |
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} |
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} |
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if ( ! $button->getattribute( 'aria-label' ) ) { |
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$svg = $button->find( 'svg', 0 ); |
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$path = $button->find( 'path', 0 ); |
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$span = $button->find( 'span', 0 ); |
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if ( $svg && $path ) { |
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$button->setattribute( 'aria-label', 'button' ); |
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} elseif ( $span ) { |
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$span_text = trim( $span->plaintext ); |
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if ( $span_text ) { |
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$button->setattribute( 'aria-label', $span_text ); |
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} |
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} |
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} |
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} |
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} |
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); |
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} |
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|
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//[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5. |
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function easywpstuff_assesplus_modify_viewport_meta_tag( $html ) { |
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|
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return wya11y_process_html_with_dom( |
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$html, |
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function( $dom ) { |
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$viewport_meta_tag = $dom->find( 'meta[name=viewport]', 0 ); |
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if ( $viewport_meta_tag ) { |
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$content = $viewport_meta_tag->getAttribute( 'content' ); |
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|
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$content = preg_replace( '/,\s*user-scalable=(?:no|0)/', '', $content ); |
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|
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if ( preg_match( '/maximum-scale=([^,\s]*)/', $content, $matches ) ) { |
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|
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$maximum_scale = (float) $matches[1]; |
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if ( $maximum_scale < 2 ) { |
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$content = preg_replace( '/maximum-scale=[^,\s]*/', 'maximum-scale=2', $content ); |
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} |
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} else { |
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$content .= ', maximum-scale=2'; |
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} |
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|
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$viewport_meta_tag->setAttribute( 'content', $content ); |
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} |
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} |
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); |
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} |
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|
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|
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function easywpstuff_assesplus_add_aria_labels_to_headers( $html ) { |
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return wya11y_process_html_with_dom( |
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$html, |
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function( $dom ) { |
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|
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foreach ( $dom->find( 'div' ) as $div ) { |
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// Check if the div or its children have no plain text |
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if ( empty( trim( $div->plaintext ) ) ) { |
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if ( $div->role == 'link' && ! $div->hasAttribute( 'aria-label' ) ) { |
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$div->setAttribute( 'aria-label', 'link' ); |
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} |
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if ( $div->role == 'button' && ! $div->hasAttribute( 'aria-label' ) ) { |
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$div->setAttribute( 'aria-label', 'button' ); |
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} |
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if ( $div->role == 'menuitem' && ! $div->hasAttribute( 'aria-label' ) ) { |
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$div->setAttribute( 'aria-label', 'menuitem' ); |
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} |
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} |
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} |
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} |
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); |
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} |
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|
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// <frame> or <iframe> elements do not have a title |
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function easywpstuff_assesplus_booster_add_to_iframes( $html ) { |
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return wya11y_process_html_with_dom( |
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$html, |
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function( $dom ) { |
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|
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foreach ( $dom->find( 'iframe' ) as $iframe ) { |
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if ( ! $iframe->hasAttribute( 'title' ) ) { |
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$iframe->setAttribute( 'title', 'iframe' ); |
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} |
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} |
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} |
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); |
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} |
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|
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function easywpstuff_assesplus_modify_tabindex_to_zero( $html ) { |
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return wya11y_process_html_with_dom( |
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$html, |
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function( $dom ) { |
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|
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foreach ( $dom->find( '*[tabindex]' ) as $element ) { |
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$tabindex = $element->getAttribute( 'tabindex' ); |
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|
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if ( $tabindex > 0 ) { |
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$element->setAttribute( 'tabindex', '0' ); |
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} |
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} |
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} |
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); |
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} |
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|
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//Links are not crawlable |
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function easywpstuff_assesplus_addHashToBlankLinks( $html ) { |
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return wya11y_process_html_with_dom( |
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$html, |
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function( $dom ) { |
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$blankLinks = $dom->find( 'a' ); |
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foreach ( $blankLinks as $link ) { |
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if ( ! $link->href || $link->href === '' ) { |
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$link->setattribute( 'href', '#' ); |
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} |
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if ( ! $link->href || $link->href === 'javascript: void(0);' ) { |
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$link->setattribute( 'href', '#' ); |
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} |
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if ( ! $link->href || $link->href === 'javascript:void(0);' ) { |
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$link->setattribute( 'href', '#' ); |
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} |
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if ( ! $link->href || $link->href === 'javascript:void(0)' ) { |
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$link->setattribute( 'href', '#' ); |
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} |
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} |
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} |
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); |
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} |
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|
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//ARIA progressbar elements do not have accessible names. |
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function easywpstuff_assesplus_add_aria_label_to_progressbar( $html ) { |
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// Use Simple HTML DOM to parse the HTML |
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return wya11y_process_html_with_dom( |
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$html, |
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function( $dom ) { |
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foreach ( $dom->find( '[role=progressbar]' ) as $element ) { |
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// Check if the element has aria-label, aria-labelledby or title attribute |
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$has_label = $element->hasAttribute( 'aria-label' ) || |
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$element->hasAttribute( 'aria-labelledby' ) || |
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$element->hasAttribute( 'title' ); |
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// If the element doesn't have a label, add aria-label="progressbar" |
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if ( ! $has_label || ( empty( $element->getAttribute( 'aria-label' ) ) && empty( $element->getAttribute( 'aria-labelledby' ) ) && empty( $element->getAttribute( 'title' ) ) ) ) { |
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$element->setAttribute( 'aria-label', 'progressbar' ); |
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} |
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} |
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} |
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); |
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} |
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//Image elements do not have [alt] attributes |
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function easywpstuff_assesplus_addAltToImg( $html ) { |
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return wya11y_process_html_with_dom( |
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$html, |
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function( $dom ) { |
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$imgs = $dom->find( 'img' ); |
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foreach ( $imgs as $img ) { |
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if ( ! $img->alt ) { |
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$alt = ''; |
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if ( $img->title ) { |
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$alt = $img->title; |
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} else { |
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$src = $img->src; |
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$alt = basename( $src ); |
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$alt = preg_replace( '/\d+/', '', $alt ); |
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$alt = preg_replace( '/\.[^.]+$/', '', $alt ); |
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$alt = str_replace( '-', ' ', $alt ); |
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$alt = str_replace( '_', ' ', $alt ); |
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if ( empty( $alt ) || is_numeric( $alt ) ) { |
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$alt = 'image'; |
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} |
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} |
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$img->setattribute( 'alt', $alt ); |
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} |
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} |
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} |
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); |
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} |
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|
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// buffer if option is enabled |
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|
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function easywpstuff_assesplus_bstr_template_redirect( $buffer ) { |
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$options = get_option( 'easywpstuff_assesplus_booster_options' ); |
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|
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if ( $options['easywpstuff_assesplus_booster_field_no_labels'] == 1 ) { |
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$buffer = easywpstuff_assesplus_check_input_labels( $buffer ); |
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} |
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|
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if ( $options['easywpstuff_assesplus_booster_field_no_accessible_name'] == 1 ) { |
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$buffer = easywpstuff_assesplus_add_aria_labels_to_buttons( $buffer ); |
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} |
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|
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if ( $options['easywpstuff_assesplus_booster_field_viewport_meta_tag'] == 1 ) { |
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$buffer = easywpstuff_assesplus_modify_viewport_meta_tag( $buffer ); |
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} |
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|
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if ( $options['easywpstuff_assesplus_booster_field_menuitem_accessible'] == 1 ) { |
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$buffer = easywpstuff_assesplus_add_aria_labels_to_headers( $buffer ); |
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} |
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|
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if ( $options['easywpstuff_assesplus_booster_field_iframe_title_tag'] == 1 ) { |
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$buffer = easywpstuff_assesplus_booster_add_to_iframes( $buffer ); |
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} |
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|
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if ( $options['easywpstuff_assesplus_add_aria_label_to_progressbar'] == 1 ) { |
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$buffer = easywpstuff_assesplus_add_aria_label_to_progressbar( $buffer ); |
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} |
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|
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if ( $options['easywpstuff_assesplus_links_not_crawlable'] == 1 ) { |
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$buffer = easywpstuff_assesplus_addHashToBlankLinks( $buffer ); |
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} |
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if ( $options['easywpstuff_assesplus_modify_tabindex_to_zero'] == 1 ) { |
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$buffer = easywpstuff_assesplus_modify_tabindex_to_zero( $buffer ); |
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} |
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|
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if ( $options['easywpstuff_assesplus_img_donot_alt'] == 1 ) { |
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$buffer = easywpstuff_assesplus_addAltToImg( $buffer ); |
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} |
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|
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if ( $options['easywpstuff_assesplus_booster_field_no_discernible_name'] == 1 ) { |
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$buffer = easywpstuff_assesplus_add_aria_labels_to_links( $buffer ); |
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} |
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|
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return $buffer; |
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} |
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|
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add_action( 'template_redirect', 'easywpstuff_assesplus_loader', 99 ); |
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function easywpstuff_assesplus_loader() { |
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|
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ob_start( 'easywpstuff_assesplus_bstr_template_redirect' ); |
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} |
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|
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// added settings link |
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function easywpstuff_assesplus_bs_settings_link( $links ) { |
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$settings_link = '<a href="' . admin_url( 'options-general.php?page=accessibilityplus' ) . '">' . __( 'Settings', 'accessibility-plus' ) . '</a>'; |
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array_unshift( $links, $settings_link ); |
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return $links; |
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} |
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add_filter( 'plugin_action_links_' . WY_A11Y_PLUGIN_BASENAME, 'easywpstuff_assesplus_bs_settings_link' ); |
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|
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// enqueue admin styles on option page |
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function easywpstuff_assesplus_admin_enqueue_plugin_styles( $hook ) { |
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if ( 'settings_page_accessibilityplus' === $hook ) { |
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wp_enqueue_style( 'lhbooster-styles', plugin_dir_url( __FILE__ ) . 'assets/style.css', array(), WY_A11Y_VERSION ); |
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} |
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} |
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add_action( 'admin_enqueue_scripts', 'easywpstuff_assesplus_admin_enqueue_plugin_styles' ); |
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|
