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<?php |
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/* |
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Plugin Name: AccessibilityPlus |
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Plugin URI: |
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Description: Improve pagespeed insight or lighthouse accessibility scores by fixing recommended issues. |
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Version: 1.2 |
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Author: easywpstuff |
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Author URI: https://easywpstuff.com |
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License: GNU General Public License v2 or later |
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*/ |
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|
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|
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require_once('vendor/autoload.php'); |
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|
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// include option |
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|
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include_once('inc/options.php'); |
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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($html) { |
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if (empty($html)) { |
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return $html; |
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} |
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|
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$dom = new \DiDom\Document($html); |
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$inputs = $dom->find('input'); |
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|
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foreach ($inputs as $input) { |
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$parent = $input->parent(); |
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if ($parent && $parent->tag !== 'label') { |
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if (!$input->hasAttribute('id') && !$input->hasAttribute('placeholder') && !$input->hasAttribute('aria-label') && !$input->hasAttribute('aria-labelledby')) { |
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$inputType = $input->getAttribute('type'); |
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if ($inputType && !in_array($inputType, ['hidden', 'button', 'submit'])) { |
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$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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return $dom->html(); |
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} |
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|
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// Links do not have a discernible name |
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function easywpstuff_assesplus_add_aria_labels_to_links($html) { |
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// Remove closing tags for img and source elements to avoid parsing issues |
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$html = str_replace('</img>', '', $html); |
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$html = str_replace('</source>', '', $html); |
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|
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$dom = new \DiDom\Document($html); |
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if (empty($dom)) { |
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return $dom; |
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} |
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|
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$links = $dom->find('a'); |
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$filteredHeaderLinks = array_filter($dom->find('header a'), function ($link) { |
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return $link->has('i') || ($link->has('span') && trim($link->text())); |
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}); |
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|
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$links = array_merge($links, $filteredHeaderLinks); |
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|
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foreach ($links as $link) { |
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$span = $link->first('span'); |
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$div = $link->first('div'); |
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$spnimg = $link->first('img'); |
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|
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if ($span && !$div && !$spnimg && !$link->hasAttribute('aria-label')) { |
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$span_text = trim($span->text()); |
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if ($span_text) { |
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$link->setAttribute('aria-label', $span_text); |
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} |
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} |
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|
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$spanimg = $link->first('span img'); |
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if ($spanimg && !$link->hasAttribute('aria-label') && (!$spanimg->hasAttribute('alt') || !$spanimg->hasAttribute('title'))) { |
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$link->setAttribute('aria-label', 'image'); |
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} |
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|
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if (!trim($link->text()) && !$link->hasAttribute('aria-label')) { |
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$child_elements = $link->find('*'); |
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if (empty($child_elements)) { |
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$link->setAttribute('aria-label', 'link'); |
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} else { |
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$icon = $link->first('i'); |
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if ($icon) { |
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$link->setAttribute('aria-label', 'icon'); |
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} else { |
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$img = $link->first('img'); |
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if ($img && !$img->hasAttribute('alt')) { |
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$link->setAttribute('aria-label', 'image'); |
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} else if ($img && (!$img->hasAttribute('alt') || !$img->hasAttribute('title'))) { |
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$link->setAttribute('aria-label', 'image'); |
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} |
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$svg = $link->first('svg'); |
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if ($svg) { |
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$link->setAttribute('aria-label', 'svg'); |
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} |
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if (!$svg && !$img) { |
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$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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return $dom->html(); |
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} |
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|
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|
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//Buttons do not have an accessible name |
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|
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function easywpstuff_assesplus_add_aria_labels_to_buttons($html) { |
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$dom = new \DiDom\Document($html); |
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$buttons = $dom->find('button'); |
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|
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foreach ($buttons as $button) { |
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if (!trim($button->text()) && !$button->hasAttribute('aria-label')) { |
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$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 (!$button->hasAttribute('aria-label')) { |
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$svg = $button->first('svg'); |
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$path = $button->first('path'); |
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$span = $button->first('span'); |
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|
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if ($svg && $path) { |
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$button->setAttribute('aria-label', 'button'); |
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} elseif ($span) { |
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$span_text = trim($span->text()); |
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if ($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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return $dom->html(); |
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} |
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|
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//[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5. |
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function easywpstuff_assesplus_modify_viewport_meta_tag($html) { |
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$dom = new \DiDom\Document($html); |
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$viewport_meta_tag = $dom->first('meta[name=viewport]'); |
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|
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if ($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, $matches)) { |
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$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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return $dom->html(); |
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} |
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|
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function easywpstuff_assesplus_add_aria_labels_to_headers($html) { |
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$dom = new \DiDom\Document($html); |
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foreach ($dom->find('header div') as $div) { |
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$role = $div->getAttribute('role'); |
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if ($role === 'link' && !$div->hasAttribute('aria-label')) { |
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$div->setAttribute('aria-label', 'link'); |
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} |
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if ($role === 'button' && !$div->hasAttribute('aria-label')) { |
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$div->setAttribute('aria-label', 'button'); |
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} |
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if ($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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return $dom->html(); |
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} |
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|
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// <frame> or <iframe> elements do not have a title |
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function easywpstuff_assesplus_booster_add_to_iframes($html) { |
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$dom = new \DiDom\Document($html); |
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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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return $dom->html(); |
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} |
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|
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//Links are not crawlable |
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function easywpstuff_assesplus_addHashToBlankLinks($html) { |
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$dom = new \DiDom\Document($html); |
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$blankLinks = $dom->find('a'); |
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foreach ($blankLinks as $link) { |
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$href = $link->getAttribute('href'); |
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if (!$href || $href === '') { |
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$link->setAttribute('href', '#'); |
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} |
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if ($href === 'javascript: void(0);' || $href === 'javascript:void(0);') { |
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$link->setAttribute('href', '#'); |
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} |
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} |
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|
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return $dom->html(); |
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} |
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|
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//ARIA progressbar elements do not have accessible names. |
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function easywpstuff_assesplus_add_aria_label_to_progressbar($html) { |
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$dom = new \DiDom\Document($html); |
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foreach ($dom->find('[role=progressbar]') as $element) { |
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$has_label = $element->hasAttribute('aria-label') || |
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$element->hasAttribute('aria-labelledby') || |
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$element->hasAttribute('title'); |
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|
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if (!$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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return $dom->html(); |
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} |
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//Image elements do not have [alt] attributes |
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function easywpstuff_assesplus_addAltToImg($html) { |
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$dom = new \DiDom\Document($html); |
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$imgs = $dom->find('img'); |
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foreach ($imgs as $img) { |
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if (!$img->getAttribute('alt')) { |
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$alt = ''; |
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if ($img->hasAttribute('title')) { |
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$alt = $img->getAttribute('title'); |
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} else { |
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$src = $img->getAttribute('src'); |
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$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('_', ' ', $alt); |
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} |
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$img->setAttribute('alt', $alt); |
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} |
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} |
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return $dom->html(); |
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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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function easywpstuff_assesplus_bstr_template_redirect( $buffer ) { |
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|
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if ( get_option( 'easywpstuff_assesplus_booster_options' )['easywpstuff_assesplus_booster_field_no_labels'] == 1 ) { |
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$buffer = easywpstuff_assesplus_check_input_labels( $buffer ); |
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} |
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|
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if ( get_option( 'easywpstuff_assesplus_booster_options' )['easywpstuff_assesplus_booster_field_no_discernible_name'] == 1 ) { |
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|
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$buffer = easywpstuff_assesplus_add_aria_labels_to_links( $buffer ); |
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} |
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|
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if ( get_option( 'easywpstuff_assesplus_booster_options' )['easywpstuff_assesplus_booster_field_no_accessible_name'] == 1 ) { |
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|
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$buffer = easywpstuff_assesplus_add_aria_labels_to_buttons( $buffer ); |
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} |
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|
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if ( get_option( 'easywpstuff_assesplus_booster_options' )['easywpstuff_assesplus_booster_field_viewport_meta_tag'] == 1 ) { |
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$buffer = easywpstuff_assesplus_modify_viewport_meta_tag( $buffer ); |
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} |
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|
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if ( get_option( 'easywpstuff_assesplus_booster_options' )['easywpstuff_assesplus_booster_field_menuitem_accessible'] == 1 ) { |
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$buffer = easywpstuff_assesplus_add_aria_labels_to_headers( $buffer ); |
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} |
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|
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if ( get_option( 'easywpstuff_assesplus_booster_options' )['easywpstuff_assesplus_booster_field_iframe_title_tag'] == 1 ) { |
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$buffer = easywpstuff_assesplus_booster_add_to_iframes( $buffer ); |
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} |
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|
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if ( get_option( 'easywpstuff_assesplus_booster_options' )['easywpstuff_assesplus_add_aria_label_to_progressbar'] == 1 ) { |
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$buffer = easywpstuff_assesplus_add_aria_label_to_progressbar( $buffer ); |
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} |
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|
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if ( get_option( 'easywpstuff_assesplus_booster_options' )['easywpstuff_assesplus_links_not_crawlable'] == 1 ) { |
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$buffer = easywpstuff_assesplus_addHashToBlankLinks( $buffer ); |
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} |
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|
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if ( get_option( 'easywpstuff_assesplus_booster_options' )['easywpstuff_assesplus_img_donot_alt'] == 1 ) { |
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$buffer = easywpstuff_assesplus_addAltToImg( $buffer ); |
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} |
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|
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return $buffer; |
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} |
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|
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//add_action( 'template_redirect', 'easywpstuff_assesplus_bstr_template_redirect', 99 ); |
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|
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// run the function |
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add_action( 'template_redirect', 'easywpstuff_assesplus_loader', 99 ); |
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function easywpstuff_assesplus_loader() { |
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|
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ob_start( 'easywpstuff_assesplus_bstr_template_redirect'); |
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|
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} |
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|
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// added settings link |
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function easywpstuff_assesplus_bs_settings_link($links) { |
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$settings_link = '<a href="' . admin_url( 'options-general.php?page=accessibilityplus' ) . '">' . __( 'Settings' ) . '</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_' . plugin_basename( __FILE__ ), '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' ); |
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} |
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} |
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add_action( 'admin_enqueue_scripts', 'easywpstuff_assesplus_admin_enqueue_plugin_styles' ); |
