782 lines
22 KiB
PHP
782 lines
22 KiB
PHP
<?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 {
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const ORIENTATION_SQUARE = 0;
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const ORIENTATION_PORTRAIT = 1;
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const ORIENTATION_LANDSCAPE = 2;
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private static $backend = "GDBackend";
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private static $casting = array(
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'Tag' => 'HTMLText',
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);
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/**
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* @config
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* @var int The width of an image thumbnail in a strip.
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*/
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private static $strip_thumbnail_width = 50;
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/**
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* @config
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* @var int The height of an image thumbnail in a strip.
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*/
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private static $strip_thumbnail_height = 50;
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/**
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* @config
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* @var int The width of an image thumbnail in the CMS.
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*/
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private static $cms_thumbnail_width = 100;
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/**
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* @config
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* @var int The height of an image thumbnail in the CMS.
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*/
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private static $cms_thumbnail_height = 100;
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/**
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* @config
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* @var int The width of an image thumbnail in the Asset section.
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*/
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private static $asset_thumbnail_width = 100;
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/**
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* @config
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* @var int The height of an image thumbnail in the Asset section.
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*/
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private static $asset_thumbnail_height = 100;
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/**
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* @config
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* @var int The width of an image preview in the Asset section.
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*/
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private static $asset_preview_width = 400;
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/**
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* @config
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* @var int The height of an image preview in the Asset section.
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*/
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private static $asset_preview_height = 200;
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public static function set_backend($backend) {
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self::$backend = $backend;
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}
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public static function get_backend() {
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return self::$backend;
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}
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/**
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* Set up template methods to access the transformations generated by 'generate' methods.
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*/
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public function defineMethods() {
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$methodNames = $this->allMethodNames();
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foreach($methodNames as $methodName) {
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if(substr($methodName,0,8) == 'generate') {
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$this->addWrapperMethod(substr($methodName,8), 'getFormattedImage');
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}
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}
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parent::defineMethods();
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}
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public function getCMSFields() {
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$fields = parent::getCMSFields();
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$urlLink = "<div class='field readonly'>";
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$urlLink .= "<label class='left'>"._t('AssetTableField.URL','URL')."</label>";
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$urlLink .= "<span class='readonly'><a href='{$this->Link()}'>{$this->RelativeLink()}</a></span>";
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$urlLink .= "</div>";
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//attach the addition file information for an image to the existing FieldGroup create in the parent class
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$fileAttributes = $fields->fieldByName('Root.Main.FilePreview')->fieldByName('FilePreviewData');
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$fileAttributes->push(new ReadonlyField("Dimensions", _t('AssetTableField.DIM','Dimensions') . ':'));
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return $fields;
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}
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/**
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* An image exists if it has a filename.
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* Does not do any filesystem checks.
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*
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* @return boolean
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*/
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public function exists() {
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if(isset($this->record["Filename"])) {
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return true;
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}
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}
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/**
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* Return an XHTML img tag for this Image,
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* or NULL if the image file doesn't exist on the filesystem.
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*
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* @return string
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*/
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public function getTag() {
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if(file_exists(Director::baseFolder() . '/' . $this->Filename)) {
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$url = $this->getURL();
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$title = ($this->Title) ? $this->Title : $this->Filename;
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if($this->Title) {
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$title = Convert::raw2att($this->Title);
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} else {
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if(preg_match("/([^\/]*)\.[a-zA-Z0-9]{1,6}$/", $title, $matches)) {
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$title = Convert::raw2att($matches[1]);
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}
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}
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return "<img src=\"$url\" alt=\"$title\" />";
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}
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}
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/**
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* Return an XHTML img tag for this Image.
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*
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* @return string
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*/
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public function forTemplate() {
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return $this->getTag();
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}
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/**
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* File names are filtered through {@link FileNameFilter}, see class documentation
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* on how to influence this behaviour.
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*
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* @deprecated 3.2
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*/
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public function loadUploadedImage($tmpFile) {
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Deprecation::notice('3.2', 'Use the Upload::loadIntoFile()');
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if(!is_array($tmpFile)) {
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user_error("Image::loadUploadedImage() Not passed an array. Most likely, the form hasn't got the right"
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. "enctype", E_USER_ERROR);
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}
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if(!$tmpFile['size']) {
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return;
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}
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$class = $this->class;
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// Create a folder
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if(!file_exists(ASSETS_PATH)) {
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mkdir(ASSETS_PATH, Config::inst()->get('Filesystem', 'folder_create_mask'));
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}
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if(!file_exists(ASSETS_PATH . "/$class")) {
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mkdir(ASSETS_PATH . "/$class", Config::inst()->get('Filesystem', 'folder_create_mask'));
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}
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// Generate default filename
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$nameFilter = FileNameFilter::create();
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$file = $nameFilter->filter($tmpFile['name']);
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if(!$file) $file = "file.jpg";
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$file = ASSETS_PATH . "/$class/$file";
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while(file_exists(BASE_PATH . "/$file")) {
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$i = $i ? ($i+1) : 2;
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$oldFile = $file;
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$file = preg_replace('/[0-9]*(\.[^.]+$)/', $i . '\\1', $file);
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if($oldFile == $file && $i > 2) user_error("Couldn't fix $file with $i", E_USER_ERROR);
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}
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if(file_exists($tmpFile['tmp_name']) && copy($tmpFile['tmp_name'], BASE_PATH . "/$file")) {
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// Remove the old images
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$this->deleteFormattedImages();
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return true;
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}
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}
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/**
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* Resize the image by preserving aspect ratio, keeping the image inside the
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* $width and $height
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*
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* @param integer $width The width to size within
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* @param integer $height The height to size within
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* @return Image
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*/
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public function SetRatioSize($width, $height) {
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// Prevent divide by zero on missing/blank file
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if(empty($this->width) || empty($this->height)) return null;
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// Check if image is already sized to the correct dimension
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$widthRatio = $width / $this->width;
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$heightRatio = $height / $this->height;
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if( $widthRatio < $heightRatio ) {
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// Target is higher aspect ratio than image, so check width
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if($this->isWidth($width)) return $this;
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} else {
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// Target is wider aspect ratio than image, so check height
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if($this->isHeight($height)) return $this;
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}
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// Item must be regenerated
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return $this->getFormattedImage('SetRatioSize', $width, $height);
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}
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/**
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* Resize the image by preserving aspect ratio, keeping the image inside the
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* $width and $height
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*
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* @param Image_Backend $backend
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* @param integer $width The width to size within
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* @param integer $height The height to size within
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* @return Image_Backend
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*/
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public function generateSetRatioSize(Image_Backend $backend, $width, $height) {
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return $backend->resizeRatio($width, $height);
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}
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/**
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* Resize this Image by width, keeping aspect ratio. Use in templates with $SetWidth.
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*
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* @param integer $width The width to set
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* @return Image
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*/
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public function SetWidth($width) {
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return $this->isWidth($width)
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? $this
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: $this->getFormattedImage('SetWidth', $width);
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}
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/**
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* Resize this Image by width, keeping aspect ratio. Use in templates with $SetWidth.
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*
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* @param Image_Backend $backend
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* @param int $width The width to set
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* @return Image_Backend
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*/
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public function generateSetWidth(Image_Backend $backend, $width) {
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return $backend->resizeByWidth($width);
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}
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/**
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* Resize this Image by height, keeping aspect ratio. Use in templates with $SetHeight.
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*
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* @param integer $height The height to set
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* @return Image
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*/
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public function SetHeight($height) {
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return $this->isHeight($height)
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? $this
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: $this->getFormattedImage('SetHeight', $height);
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}
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/**
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* Resize this Image by height, keeping aspect ratio. Use in templates with $SetHeight.
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*
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* @param Image_Backend $backend
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* @param integer $height The height to set
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* @return Image_Backend
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*/
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public function generateSetHeight(Image_Backend $backend, $height){
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return $backend->resizeByHeight($height);
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}
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/**
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* Resize this Image by both width and height, using padded resize. Use in templates with $SetSize.
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* @see Image::PaddedImage()
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*
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* @param integer $width The width to size to
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* @param integer $height The height to size to
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* @return Image
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*/
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public function SetSize($width, $height) {
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return $this->isSize($width, $height)
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? $this
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: $this->getFormattedImage('SetSize', $width, $height);
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}
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/**
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* Resize this Image by both width and height, using padded resize. Use in templates with $SetSize.
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*
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* @param Image_Backend $backend
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* @param integer $width The width to size to
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* @param integer $height The height to size to
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* @return Image_Backend
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*/
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public function generateSetSize(Image_Backend $backend, $width, $height) {
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return $backend->paddedResize($width, $height);
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}
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public function CMSThumbnail() {
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return $this->getFormattedImage('CMSThumbnail');
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}
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/**
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* Resize this image for the CMS. Use in templates with $CMSThumbnail.
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* @return Image_Backend
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*/
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public function generateCMSThumbnail(Image_Backend $backend) {
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return $backend->paddedResize($this->stat('cms_thumbnail_width'),$this->stat('cms_thumbnail_height'));
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}
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/**
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* Resize this image for preview in the Asset section. Use in templates with $AssetLibraryPreview.
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* @return Image_Backend
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*/
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public function generateAssetLibraryPreview(Image_Backend $backend) {
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return $backend->paddedResize($this->stat('asset_preview_width'),$this->stat('asset_preview_height'));
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}
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/**
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* Resize this image for thumbnail in the Asset section. Use in templates with $AssetLibraryThumbnail.
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* @return Image_Backend
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*/
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public function generateAssetLibraryThumbnail(Image_Backend $backend) {
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return $backend->paddedResize($this->stat('asset_thumbnail_width'),$this->stat('asset_thumbnail_height'));
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}
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/**
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* Resize this image for use as a thumbnail in a strip. Use in templates with $StripThumbnail.
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* @return Image_Backend
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*/
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public function generateStripThumbnail(Image_Backend $backend) {
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return $backend->croppedResize($this->stat('strip_thumbnail_width'),$this->stat('strip_thumbnail_height'));
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}
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/**
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* Resize this Image by both width and height, using padded resize. Use in templates with $PaddedImage.
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* @see Image::SetSize()
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*
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* @param integer $width The width to size to
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* @param integer $height The height to size to
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* @return Image
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*/
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public function PaddedImage($width, $height, $backgroundColor='FFFFFF') {
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return $this->isSize($width, $height)
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? $this
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: $this->getFormattedImage('PaddedImage', $width, $height, $backgroundColor);
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}
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/**
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* Resize this Image by both width and height, using padded resize. Use in templates with $PaddedImage.
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*
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* @param Image_Backend $backend
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* @param integer $width The width to size to
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* @param integer $height The height to size to
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* @return Image_Backend
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*/
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public function generatePaddedImage(Image_Backend $backend, $width, $height, $backgroundColor='FFFFFF') {
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return $backend->paddedResize($width, $height, $backgroundColor);
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}
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/**
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* Determine if this image is of the specified size
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*
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* @param integer $width Width to check
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* @param integer $height Height to check
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* @return boolean
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*/
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public function isSize($width, $height) {
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return $this->isWidth($width) && $this->isHeight($height);
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}
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/**
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* Determine if this image is of the specified width
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*
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* @param integer $width Width to check
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* @return boolean
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*/
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public function isWidth($width) {
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return !empty($width) && $this->getWidth() == $width;
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}
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/**
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* Determine if this image is of the specified width
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*
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* @param integer $height Height to check
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* @return boolean
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*/
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public function isHeight($height) {
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return !empty($height) && $this->getHeight() == $height;
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}
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/**
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* Return an image object representing the image in the given format.
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* This image will be generated using generateFormattedImage().
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* The generated image is cached, to flush the cache append ?flush=1 to your URL.
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*
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* Just pass the correct number of parameters expected by the working function
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*
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* @param string $format The name of the format.
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* @return Image_Cached
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*/
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public function getFormattedImage($format) {
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$args = func_get_args();
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if($this->ID && $this->Filename && Director::fileExists($this->Filename)) {
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$cacheFile = call_user_func_array(array($this, "cacheFilename"), $args);
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if(!file_exists(Director::baseFolder()."/".$cacheFile) || isset($_GET['flush'])) {
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call_user_func_array(array($this, "generateFormattedImage"), $args);
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}
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$cached = new Image_Cached($cacheFile);
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// Pass through the title so the templates can use it
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$cached->Title = $this->Title;
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// Pass through the parent, to store cached images in correct folder.
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$cached->ParentID = $this->ParentID;
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return $cached;
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}
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}
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/**
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* Return the filename for the cached image, given it's format name and arguments.
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* @param string $format The format name.
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* @return string
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* @throws InvalidArgumentException
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*/
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public function cacheFilename($format) {
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$args = func_get_args();
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array_shift($args);
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$folder = $this->ParentID ? $this->Parent()->Filename : ASSETS_DIR . "/";
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$format = $format . base64_encode(json_encode($args, JSON_NUMERIC_CHECK));
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$filename = $format . "-" . $this->Name;
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$patterns = $this->getFilenamePatterns($this->Name);
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if (!preg_match($patterns['FullPattern'], $filename)) {
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throw new InvalidArgumentException('Filename ' . $filename
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. ' that should be used to cache a resized image is invalid');
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}
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return $folder . "_resampled/" . $filename;
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}
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/**
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* Generate an image on the specified format. It will save the image
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* at the location specified by cacheFilename(). The image will be generated
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* using the specific 'generate' method for the specified format.
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*
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* @param string $format Name of the format to generate.
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*/
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public function generateFormattedImage($format) {
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$args = func_get_args();
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$cacheFile = call_user_func_array(array($this, "cacheFilename"), $args);
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$backend = Injector::inst()->createWithArgs(self::$backend, array(
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Director::baseFolder()."/" . $this->Filename,
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$args
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));
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if($backend->hasImageResource()) {
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$generateFunc = "generate$format";
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if($this->hasMethod($generateFunc)){
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array_shift($args);
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array_unshift($args, $backend);
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$backend = call_user_func_array(array($this, $generateFunc), $args);
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if($backend){
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$backend->writeTo(Director::baseFolder()."/" . $cacheFile);
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}
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} else {
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user_error("Image::generateFormattedImage - Image $format public function not found.",E_USER_WARNING);
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}
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}
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}
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/**
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* Generate a resized copy of this image with the given width & height.
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* Use in templates with $ResizedImage.
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*
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* @param integer $width Width to resize to
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* @param integer $height Height to resize to
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* @return Image
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*/
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public function ResizedImage($width, $height) {
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return $this->isSize($width, $height)
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? $this
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: $this->getFormattedImage('ResizedImage', $width, $height);
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}
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/**
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* Generate a resized copy of this image with the given width & height.
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* Use in templates with $ResizedImage.
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*
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* @param Image_Backend $backend
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* @param integer $width Width to resize to
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* @param integer $height Height to resize to
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* @return Image_Backend
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*/
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public function generateResizedImage(Image_Backend $backend, $width, $height) {
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if(!$backend){
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user_error("Image::generateFormattedImage - generateResizedImage is being called by legacy code"
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. " or Image::\$backend is not set.",E_USER_WARNING);
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}else{
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return $backend->resize($width, $height);
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}
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}
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/**
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* Generate a resized copy of this image with the given width & height, cropping to maintain aspect ratio.
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* Use in templates with $CroppedImage
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*
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* @param integer $width Width to crop to
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* @param integer $height Height to crop to
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* @return Image
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*/
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public function CroppedImage($width, $height) {
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return $this->isSize($width, $height)
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? $this
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: $this->getFormattedImage('CroppedImage', $width, $height);
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}
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/**
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* Generate a resized copy of this image with the given width & height, cropping to maintain aspect ratio.
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* Use in templates with $CroppedImage
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*
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* @param Image_Backend $backend
|
|
* @param integer $width Width to crop to
|
|
* @param integer $height Height to crop to
|
|
* @return Image_Backend
|
|
*/
|
|
public function generateCroppedImage(Image_Backend $backend, $width, $height) {
|
|
return $backend->croppedResize($width, $height);
|
|
}
|
|
|
|
/**
|
|
* Generate patterns that will help to match filenames of cached images
|
|
* @param string $filename Filename of source image
|
|
* @return array
|
|
*/
|
|
private function getFilenamePatterns($filename) {
|
|
$methodNames = $this->allMethodNames(true);
|
|
$generateFuncs = array();
|
|
foreach($methodNames as $methodName) {
|
|
if(substr($methodName, 0, 8) == 'generate') {
|
|
$format = substr($methodName, 8);
|
|
$generateFuncs[] = preg_quote($format);
|
|
}
|
|
}
|
|
// All generate functions may appear any number of times in the image cache name.
|
|
$generateFuncs = implode('|', $generateFuncs);
|
|
$base64Match = "[a-zA-Z0-9\/\r\n+]*={0,2}";
|
|
return array(
|
|
'FullPattern' => "/^((?P<Generator>{$generateFuncs})(?P<Args>" . $base64Match . ")\-)+"
|
|
. preg_quote($filename) . "$/i",
|
|
'GeneratorPattern' => "/(?P<Generator>{$generateFuncs})(?P<Args>" . $base64Match . ")\-/i"
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Generate a list of images that were generated from this image
|
|
*/
|
|
private function getGeneratedImages() {
|
|
$generatedImages = array();
|
|
$cachedFiles = array();
|
|
|
|
$folder = $this->ParentID ? $this->Parent()->Filename : ASSETS_DIR . '/';
|
|
$cacheDir = Director::getAbsFile($folder . '_resampled/');
|
|
|
|
if(is_dir($cacheDir)) {
|
|
if($handle = opendir($cacheDir)) {
|
|
while(($file = readdir($handle)) !== false) {
|
|
// ignore all entries starting with a dot
|
|
if(substr($file, 0, 1) != '.' && is_file($cacheDir . $file)) {
|
|
$cachedFiles[] = $file;
|
|
}
|
|
}
|
|
closedir($handle);
|
|
}
|
|
}
|
|
|
|
$pattern = $this->getFilenamePatterns($this->Name);
|
|
|
|
foreach($cachedFiles as $cfile) {
|
|
if(preg_match($pattern['FullPattern'], $cfile, $matches)) {
|
|
if(Director::fileExists($cacheDir . $cfile)) {
|
|
$subFilename = substr($cfile, 0, -1 * strlen($this->Name));
|
|
preg_match_all($pattern['GeneratorPattern'], $subFilename, $subMatches, PREG_SET_ORDER);
|
|
|
|
$generatorArray = array();
|
|
foreach ($subMatches as $singleMatch) {
|
|
$generatorArray[] = array('Generator' => $singleMatch['Generator'],
|
|
'Args' => json_decode(base64_decode($singleMatch['Args'])));
|
|
}
|
|
|
|
// Using array_reverse is important, as a cached image will
|
|
// have the generators settings in the filename in reversed
|
|
// order: the last generator given in the filename is the
|
|
// first that was used. Later resizements are prepended
|
|
$generatedImages[] = array ( 'FileName' => $cacheDir . $cfile,
|
|
'Generators' => array_reverse($generatorArray) );
|
|
}
|
|
}
|
|
}
|
|
|
|
return $generatedImages;
|
|
}
|
|
|
|
/**
|
|
* Regenerate all of the formatted cached images for this image.
|
|
*
|
|
* @return int The number of formatted images regenerated
|
|
*/
|
|
public function regenerateFormattedImages() {
|
|
if(!$this->Filename) return 0;
|
|
|
|
// Without this, not a single file would be written
|
|
// caused by a check in getFormattedImage()
|
|
$_GET['flush'] = 1;
|
|
|
|
$numGenerated = 0;
|
|
$generatedImages = $this->getGeneratedImages();
|
|
$doneList = array();
|
|
foreach($generatedImages as $singleImage) {
|
|
$cachedImage = $this;
|
|
if (in_array($singleImage['FileName'], $doneList) ) continue;
|
|
|
|
foreach($singleImage['Generators'] as $singleGenerator) {
|
|
$args = array_merge(array($singleGenerator['Generator']), $singleGenerator['Args']);
|
|
$cachedImage = call_user_func_array(array($cachedImage, "getFormattedImage"), $args);
|
|
}
|
|
$doneList[] = $singleImage['FileName'];
|
|
$numGenerated++;
|
|
}
|
|
|
|
return $numGenerated;
|
|
}
|
|
|
|
/**
|
|
* Remove all of the formatted cached images for this image.
|
|
*
|
|
* @return int The number of formatted images deleted
|
|
*/
|
|
public function deleteFormattedImages() {
|
|
if(!$this->Filename) return 0;
|
|
|
|
$numDeleted = 0;
|
|
$generatedImages = $this->getGeneratedImages();
|
|
foreach($generatedImages as $singleImage) {
|
|
unlink($singleImage['FileName']);
|
|
$numDeleted++;
|
|
}
|
|
|
|
return $numDeleted;
|
|
}
|
|
|
|
/**
|
|
* Get the dimensions of this Image.
|
|
* @param string $dim If this is equal to "string", return the dimensions in string form,
|
|
* if it is 0 return the height, if it is 1 return the width.
|
|
* @return string|int
|
|
*/
|
|
public function getDimensions($dim = "string") {
|
|
if($this->getField('Filename')) {
|
|
|
|
$imagefile = Director::baseFolder() . '/' . $this->getField('Filename');
|
|
if(file_exists($imagefile)) {
|
|
$size = getimagesize($imagefile);
|
|
return ($dim === "string") ? "$size[0]x$size[1]" : $size[$dim];
|
|
} else {
|
|
return ($dim === "string") ? "file '$imagefile' not found" : null;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Get the width of this image.
|
|
* @return int
|
|
*/
|
|
public function getWidth() {
|
|
return $this->getDimensions(0);
|
|
}
|
|
|
|
/**
|
|
* Get the height of this image.
|
|
* @return int
|
|
*/
|
|
public function getHeight() {
|
|
return $this->getDimensions(1);
|
|
}
|
|
|
|
/**
|
|
* Get the orientation of this image.
|
|
* @return ORIENTATION_SQUARE | ORIENTATION_PORTRAIT | ORIENTATION_LANDSCAPE
|
|
*/
|
|
public function getOrientation() {
|
|
$width = $this->getWidth();
|
|
$height = $this->getHeight();
|
|
if($width > $height) {
|
|
return self::ORIENTATION_LANDSCAPE;
|
|
} elseif($height > $width) {
|
|
return self::ORIENTATION_PORTRAIT;
|
|
} else {
|
|
return self::ORIENTATION_SQUARE;
|
|
}
|
|
}
|
|
|
|
public function onAfterUpload() {
|
|
$this->deleteFormattedImages();
|
|
parent::onAfterUpload();
|
|
}
|
|
|
|
protected function onBeforeDelete() {
|
|
$backend = Injector::inst()->create(self::$backend);
|
|
$backend->onBeforeDelete($this);
|
|
|
|
$this->deleteFormattedImages();
|
|
|
|
parent::onBeforeDelete();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* A resized / processed {@link Image} object.
|
|
* When Image object are processed or resized, a suitable Image_Cached object is returned, pointing to the
|
|
* cached copy of the processed image.
|
|
*
|
|
* @package framework
|
|
* @subpackage filesystem
|
|
*/
|
|
class Image_Cached extends Image {
|
|
|
|
/**
|
|
* Create a new cached image.
|
|
* @param string $filename The filename of the image.
|
|
* @param boolean $isSingleton This this to true if this is a singleton() object, a stub for calling methods.
|
|
* Singletons don't have their defaults set.
|
|
*/
|
|
public function __construct($filename = null, $isSingleton = false) {
|
|
parent::__construct(array(), $isSingleton);
|
|
$this->ID = -1;
|
|
$this->Filename = $filename;
|
|
}
|
|
|
|
public function getRelativePath() {
|
|
return $this->getField('Filename');
|
|
}
|
|
|
|
/**
|
|
* Prevent creating new tables for the cached record
|
|
*
|
|
* @return false
|
|
*/
|
|
public function requireTable() {
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Prevent writing the cached image to the database
|
|
*
|
|
* @throws Exception
|
|
*/
|
|
public function write($showDebug = false, $forceInsert = false, $forceWrite = false, $writeComponents = false) {
|
|
throw new Exception("{$this->ClassName} can not be written back to the database.");
|
|
}
|
|
}
|