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<?php |
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/** |
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* Represents an Image |
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* |
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* @package framework |
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* @subpackage filesystem |
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*/ |
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class Image extends File implements ShortcodeHandler { |
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public function __construct($record = null, $isSingleton = false, $model = null, $queryParams = array()) { |
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parent::__construct($record, $isSingleton, $model, $queryParams); |
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$this->File->setAllowedCategories('image/supported'); |
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} |
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public function getCMSFields() { |
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$fields = parent::getCMSFields(); |
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$fields->insertAfter( |
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'LastEdited', |
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new ReadonlyField("Dimensions", _t('AssetTableField.DIM','Dimensions') . ':') |
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); |
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return $fields; |
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} |
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public function getIsImage() { |
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return true; |
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} |
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/** |
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* Replace"[image id=n]" shortcode with an image reference. |
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* Permission checks will be enforced by the file routing itself. |
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* |
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* @param array $args Arguments passed to the parser |
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* @param string $content Raw shortcode |
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* @param ShortcodeParser $parser Parser |
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* @param string $shortcode Name of shortcode used to register this handler |
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* @param array $extra Extra arguments |
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* @return string Result of the handled shortcode |
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*/ |
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public static function handle_shortcode($args, $content, $parser, $shortcode, $extra = array()) { |
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// Find appropriate record, with fallback for error handlers |
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$record = static::find_shortcode_record($args, $errorCode); |
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if($errorCode) { |
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$record = static::find_error_record($errorCode); |
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} |
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if (!$record) { |
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return null; // There were no suitable matches at all. |
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} |
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// Check if a resize is required |
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$src = $record->Link(); |
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if($record instanceof Image) { |
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$width = isset($args['width']) ? $args['width'] : null; |
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$height = isset($args['height']) ? $args['height'] : null; |
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$hasCustomDimensions = ($width && $height); |
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if ($hasCustomDimensions && (($width != $record->getWidth()) || ($height != $record->getHeight()))) { |
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$resized = $record->ResizedImage($width, $height); |
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// Make sure that the resized image actually returns an image |
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if($resized) { |
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$src = $resized->getURL(); |
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} |
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} |
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} |
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// Build the HTML tag |
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$attrs = array_merge( |
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// Set overrideable defaults |
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['src' => '', 'alt' => $record->Title], |
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// Use all other shortcode arguments |
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$args, |
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// But enforce some values |
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['id' => '', 'src' => $src] |
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); |
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// Clean out any empty attributes |
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$attrs = array_filter($attrs, function($v) {return (bool)$v;}); |
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// Condense to HTML attribute string |
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$attrsStr = join(' ', array_map(function($name) use ($attrs) { |
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return Convert::raw2att($name) . '="' . Convert::raw2att($attrs[$name]) . '"'; |
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}, array_keys($attrs))); |
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return '<img ' . $attrsStr . ' />'; |
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} |
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/** |
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* Regenerates "[image id=n]" shortcode with new src attribute prior to being edited within the CMS. |
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* |
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* @param array $args Arguments passed to the parser |
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* @param string $content Raw shortcode |
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* @param ShortcodeParser $parser Parser |
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* @param string $shortcode Name of shortcode used to register this handler |
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* @param array $extra Extra arguments |
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* @return string Result of the handled shortcode |
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*/ |
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public static function regenerate_shortcode($args, $content, $parser, $shortcode, $extra = array()) { |
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// Check if there is a suitable record |
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$record = static::find_shortcode_record($args); |
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if($record) { |
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$args['src'] = $record->getURL(); |
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} |
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// Rebuild shortcode |
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$parts = array(); |
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foreach($args as $name => $value) { |
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$htmlValue = Convert::raw2att($value ?: $name); |
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$parts[] = sprintf('%s="%s"', $name, $htmlValue); |
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} |
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return sprintf("[%s %s]", $shortcode, implode(' ', $parts)); |
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} |
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/** |
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* Helper method to regenerate all shortcode links. |
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* |
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* @param string $value HTML value |
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* @return string value with links resampled |
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*/ |
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public static function regenerate_html_links($value) { |
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// Create a shortcode generator which only regenerates links |
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$regenerator = ShortcodeParser::get('regenerator'); |
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return $regenerator->parse($value); |
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} |
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} |
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In PHP, under loose comparison (like
==
, or!=
, orswitch
conditions), values of different types might be equal.For
integer
values, zero is a special case, in particular the following results might be unexpected: