mirror of
https://github.com/silverstripe/silverstripe-framework
synced 2024-10-22 14:05:37 +02:00
518 lines
15 KiB
PHP
518 lines
15 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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static $backend = "GDBackend";
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static $casting = array(
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'Tag' => 'HTMLText',
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);
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/**
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* The width of an image thumbnail in a strip.
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* @var int
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*/
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public static $strip_thumbnail_width = 50;
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/**
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* The height of an image thumbnail in a strip.
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* @var int
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*/
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public static $strip_thumbnail_height = 50;
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/**
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* The width of an image thumbnail in the CMS.
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* @var int
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*/
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public static $cms_thumbnail_width = 100;
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/**
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* The height of an image thumbnail in the CMS.
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*/
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public static $cms_thumbnail_height = 100;
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/**
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* The width of an image thumbnail in the Asset section.
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*/
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public static $asset_thumbnail_width = 100;
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/**
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* The height of an image thumbnail in the Asset section.
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*/
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public static $asset_thumbnail_height = 100;
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/**
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* The width of an image preview in the Asset section.
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*/
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public static $asset_preview_width = 400;
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/**
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* The height of an image preview in the Asset section.
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*/
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public 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 $this->getTag();
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}
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/**
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* File names are filtered through {@link FileNameFilter}, see class documentation
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* on how to influence this behaviour.
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*/
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public function loadUploadedImage($tmpFile) {
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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 = $this->class;
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// Create a folder
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if(!file_exists(ASSETS_PATH)) {
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mkdir(ASSETS_PATH, Filesystem::$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", 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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$this->deleteFormattedImages();
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return true;
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}
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}
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public function SetWidth($width) {
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return $this->getWidth() == $width ? $this : $this->getFormattedImage('SetWidth', $width);
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}
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public function SetHeight($height) {
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return $this->getHeight() == $height ? $this : $this->getFormattedImage('SetHeight', $height);
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}
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public function SetSize($width, $height) {
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return (($this->getWidth() == $width) && ($this->getHeight() == $height))
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? $this
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: $this->getFormattedImage('SetSize', $width, $height);
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}
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public function SetRatioSize($width, $height) {
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return $this->getFormattedImage('SetRatioSize', $width, $height);
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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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* @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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* @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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* @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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public function generatePaddedImage(Image_Backend $backend, $width, $height) {
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return $backend->paddedResize($width, $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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* @param string $format The name of the format.
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* @param string $arg1 An argument to pass to the generate function.
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* @param string $arg2 A second argument to pass to the generate function.
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* @return Image_Cached
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*/
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public function getFormattedImage($format, $arg1 = null, $arg2 = null) {
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if($this->ID && $this->Filename && Director::fileExists($this->Filename)) {
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$cacheFile = $this->cacheFilename($format, $arg1, $arg2);
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if(!file_exists(Director::baseFolder()."/".$cacheFile) || isset($_GET['flush'])) {
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$this->generateFormattedImage($format, $arg1, $arg2);
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}
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$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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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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* @param string $arg1 The first argument passed to the generate function.
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* @param string $arg2 The second argument passed to the generate function.
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* @return string
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*/
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public function cacheFilename($format, $arg1 = null, $arg2 = null) {
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$folder = $this->ParentID ? $this->Parent()->Filename : ASSETS_DIR . "/";
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$format = $format.$arg1.$arg2;
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return $folder . "_resampled/$format-" . $this->Name;
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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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* @param string $format Name of the format to generate.
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* @param string $arg1 Argument to pass to the generate method.
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* @param string $arg2 A second argument to pass to the generate method.
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*/
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public function generateFormattedImage($format, $arg1 = null, $arg2 = null) {
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$cacheFile = $this->cacheFilename($format, $arg1, $arg2);
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$backend = Injector::inst()->createWithArgs(self::$backend, array(
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Director::baseFolder()."/" . $this->Filename
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));
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if($backend->hasImageResource()) {
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$generateFunc = "generate$format";
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if($this->hasMethod($generateFunc)){
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$backend = $this->$generateFunc($backend, $arg1, $arg2);
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if($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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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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public function generateCroppedImage(Image_Backend $backend, $width, $height) {
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return $backend->croppedResize($width, $height);
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}
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/**
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* Remove all of the formatted cached images for this image.
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*
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* @return int The number of formatted images deleted
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*/
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public function deleteFormattedImages() {
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if(!$this->Filename) return 0;
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$numDeleted = 0;
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$methodNames = $this->allMethodNames(true);
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$cachedFiles = array();
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$folder = $this->ParentID ? $this->Parent()->Filename : ASSETS_DIR . '/';
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$cacheDir = Director::getAbsFile($folder . '_resampled/');
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if(is_dir($cacheDir)) {
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if($handle = opendir($cacheDir)) {
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while(($file = readdir($handle)) !== false) {
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// ignore all entries starting with a dot
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if(substr($file, 0, 1) != '.' && is_file($cacheDir . $file)) {
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$cachedFiles[] = $file;
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}
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}
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closedir($handle);
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}
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}
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$generateFuncs = array();
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foreach($methodNames as $methodName) {
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if(substr($methodName, 0, 8) == 'generate') {
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$format = substr($methodName, 8);
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$generateFuncs[] = preg_quote($format);
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}
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}
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// All generate functions may appear any number of times in the image cache name.
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$generateFuncs = implode('|', $generateFuncs);
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$pattern = "/^(({$generateFuncs})\d+\-)+" . preg_quote($this->Name) . "$/i";
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foreach($cachedFiles as $cfile) {
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if(preg_match($pattern, $cfile)) {
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if(Director::fileExists($cacheDir . $cfile)) {
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unlink($cacheDir . $cfile);
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$numDeleted++;
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}
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}
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}
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return $numDeleted;
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}
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/**
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* Get the dimensions of this Image.
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* @param string $dim If this is equal to "string", return the dimensions in string form,
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* if it is 0 return the height, if it is 1 return the width.
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* @return string|int
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*/
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public function getDimensions($dim = "string") {
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if($this->getField('Filename')) {
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$imagefile = Director::baseFolder() . '/' . $this->getField('Filename');
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if(file_exists($imagefile)) {
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$size = getimagesize($imagefile);
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return ($dim === "string") ? "$size[0]x$size[1]" : $size[$dim];
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} else {
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return ($dim === "string") ? "file '$imagefile' not found" : null;
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}
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}
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}
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/**
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* Get the width of this image.
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* @return int
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*/
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public function getWidth() {
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return $this->getDimensions(0);
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}
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/**
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* Get the height of this image.
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* @return int
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*/
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public function getHeight() {
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return $this->getDimensions(1);
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}
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/**
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* Get the orientation of this image.
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* @return ORIENTATION_SQUARE | ORIENTATION_PORTRAIT | ORIENTATION_LANDSCAPE
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*/
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public function getOrientation() {
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$width = $this->getWidth();
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$height = $this->getHeight();
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if($width > $height) {
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return self::ORIENTATION_LANDSCAPE;
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} elseif($height > $width) {
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return self::ORIENTATION_PORTRAIT;
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} else {
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return self::ORIENTATION_SQUARE;
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}
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}
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protected function onBeforeDelete() {
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parent::onBeforeDelete();
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$this->deleteFormattedImages();
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}
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}
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/**
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* A resized / processed {@link Image} object.
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* When Image object are processed or resized, a suitable Image_Cached object is returned, pointing to the
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* cached copy of the processed 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_Cached extends Image {
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/**
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* Create a new cached image.
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* @param string $filename The filename of the image.
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* @param boolean $isSingleton This this to true if this is a singleton() object, a stub for calling methods.
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* Singletons don't have their defaults set.
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*/
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public function __construct($filename = null, $isSingleton = false) {
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parent::__construct(array(), $isSingleton);
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$this->ID = -1;
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$this->Filename = $filename;
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}
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public function getRelativePath() {
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return $this->getField('Filename');
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}
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/**
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* Prevent creating new tables for the cached record
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*
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* @return false
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*/
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public function requireTable() {
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return false;
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}
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/**
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* Prevent writing the cached image to the database
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*
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* @throws Exception
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*/
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public function write($showDebug = false, $forceInsert = false, $forceWrite = false, $writeComponents = false) {
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throw new Exception("{$this->ClassName} can not be written back to the database.");
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}
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}
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