System update (installation with image plugin)
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markseu
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media/thumbnails/picture-100x40.jpg
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media/thumbnails/picture-100x40.jpg
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system/plugins/image.php
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system/plugins/image.php
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<?php
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// Copyright (c) 2013-2016 Datenstrom, http://datenstrom.se
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// This file may be used and distributed under the terms of the public license.
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// Image plugin
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class YellowImage
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{
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const VERSION = "0.6.7";
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var $yellow; //access to API
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var $graphicsLibrary; //graphics library support? (boolean)
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// Handle initialisation
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function onLoad($yellow)
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{
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$this->yellow = $yellow;
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$this->yellow->config->setDefault("imageThumbnailLocation", "/media/thumbnails/");
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$this->yellow->config->setDefault("imageThumbnailDir", "media/thumbnails/");
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$this->yellow->config->setDefault("imageAlt", "Image");
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$this->yellow->config->setDefault("imageJpegQuality", 80);
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$this->graphicsLibrary = $this->isGraphicsLibrary();
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}
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// Handle page content parsing of custom block
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function onParseContentBlock($page, $name, $text, $shortcut)
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{
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$output = null;
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if($name=="image" && $shortcut)
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{
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if(!$this->graphicsLibrary)
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{
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$this->yellow->page->error(500, "Plugin 'image' requires GD library with JPG and PNG support!");
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return $output;
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}
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list($name, $alt, $style, $width, $height) = $this->yellow->toolbox->getTextArgs($text);
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if(!preg_match("/^\w+:/", $name))
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{
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if(empty($alt)) $alt = $this->yellow->config->get("imageAlt");
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if(empty($width)) $width = "100%";
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if(empty($height)) $height = $width;
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list($src, $width, $height) = $this->getImageInfo($this->yellow->config->get("imageDir").$name, $width, $height);
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} else {
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$src = $this->yellow->lookup->normaliseLocation($name, $page->base, $page->location);
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$width = $height = 0;
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}
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$output = "<img src=\"".htmlspecialchars($src)."\"";
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if($width && $height) $output .= " width=\"".htmlspecialchars($width)."\" height=\"".htmlspecialchars($height)."\"";
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if(!empty($alt)) $output .= " alt=\"".htmlspecialchars($alt)."\" title=\"".htmlspecialchars($alt)."\"";
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if(!empty($style)) $output .= " class=\"".htmlspecialchars($style)."\"";
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$output .= " />";
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}
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return $output;
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}
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// Handle command
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function onCommand($args)
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{
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list($command) = $args;
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switch($command)
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{
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case "clean": $statusCode = $this->cleanCommand($args); break;
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default: $statusCode = 0;
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}
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return $statusCode;
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}
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// Clean thumbnails
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function cleanCommand($args)
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{
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$statusCode = 0;
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list($command, $path) = $args;
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if($path=="all")
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{
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$path = $this->yellow->config->get("imageThumbnailDir");
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foreach($this->yellow->toolbox->getDirectoryEntries($path, "/.*/", false, false) as $entry)
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{
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if(!$this->yellow->toolbox->deleteFile($entry)) $statusCode = 500;
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}
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if($statusCode==500) echo "ERROR cleaning thumbnails: Can't delete files in directory '$path'!\n";
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}
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return $statusCode;
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}
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// Return image info, create thumbnail on demand
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function getImageInfo($fileName, $widthOutput, $heightOutput)
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{
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$fileNameShort = substru($fileName, strlenu($this->yellow->config->get("imageDir")));
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list($widthInput, $heightInput, $type) = $this->yellow->toolbox->detectImageInfo($fileName);
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$widthOutput = $this->convertValueAndUnit($widthOutput, $widthInput);
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$heightOutput = $this->convertValueAndUnit($heightOutput, $heightInput);
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if(($widthInput==$widthOutput && $heightInput==$heightOutput) || $type=="svg")
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{
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$src = $this->yellow->config->get("serverBase").$this->yellow->config->get("imageLocation").$fileNameShort;
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$width = $widthOutput; $height = $heightOutput;
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} else {
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$fileNameThumb = ltrim(str_replace(array("/", "\\", "."), "-", dirname($fileNameShort)."/".pathinfo($fileName, PATHINFO_FILENAME)), "-");
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$fileNameThumb .= "-".$widthOutput."x".$heightOutput;
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$fileNameThumb .= ".".pathinfo($fileName, PATHINFO_EXTENSION);
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$fileNameOutput = $this->yellow->config->get("imageThumbnailDir").$fileNameThumb;
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if($this->isFileNotUpdated($fileName, $fileNameOutput))
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{
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$image = $this->loadImage($fileName, $type);
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$image = $this->resizeImage($image, $widthInput, $heightInput, $widthOutput, $heightOutput);
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if(!$this->saveImage($image, $fileNameOutput, $type) ||
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!$this->yellow->toolbox->modifyFile($fileNameOutput, $this->yellow->toolbox->getFileModified($fileName)))
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{
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$this->yellow->page->error(500, "Image '$fileNameOutput' can't be saved!");
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}
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}
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$src = $this->yellow->config->get("serverBase").$this->yellow->config->get("imageThumbnailLocation").$fileNameThumb;
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list($width, $height) = $this->yellow->toolbox->detectImageInfo($fileNameOutput);
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}
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return array($src, $width, $height);
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}
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// Load image from file
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function loadImage($fileName, $type)
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{
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$image = false;
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switch($type)
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{
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case "jpg": $image = @imagecreatefromjpeg($fileName); break;
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case "png": $image = @imagecreatefrompng($fileName); break;
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}
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return $image;
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}
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// Create image from scratch
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function createImage($width, $height)
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{
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$image = imagecreatetruecolor($width, $height);
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imagealphablending($image, false);
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imagesavealpha($image, true);
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return $image;
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}
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// Resize image
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function resizeImage($image, $widthInput, $heightInput, $widthOutput, $heightOutput)
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{
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$widthFit = $widthInput * ($heightOutput / $heightInput);
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$heightFit = $heightInput * ($widthOutput / $widthInput);
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$widthDiff = abs($widthOutput - $widthFit);
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$heightDiff = abs($heightOutput - $heightFit);
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$imageOutput = $this->createImage($widthOutput, $heightOutput);
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if($heightFit>$heightOutput)
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{
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imagecopyresampled($imageOutput, $image, 0, $heightDiff/-2, 0, 0, $widthOutput, $heightFit, $widthInput, $heightInput);
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} else {
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imagecopyresampled($imageOutput, $image, $widthDiff/-2, 0, 0, 0, $widthFit, $heightOutput, $widthInput, $heightInput);
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}
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return $imageOutput;
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}
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// Save image to file
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function saveImage($image, $fileName, $type)
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{
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$ok = false;
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switch($type)
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{
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case "jpg": $ok = @imagejpeg($image, $fileName, $this->yellow->config->get("imageJpegQuality")); break;
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case "png": $ok = @imagepng($image, $fileName); break;
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}
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return $ok;
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}
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// Return value according to unit
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function convertValueAndUnit($text, $valueBase)
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{
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$value = $unit = "";
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if(preg_match("/([\d\.]+)(\S*)/", $text, $matches))
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{
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$value = $matches[1];
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$unit = $matches[2];
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if($unit=="%") $value = $valueBase * $value / 100;
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}
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return intval($value);
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}
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// Check if file needs to be updated
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function isFileNotUpdated($fileNameInput, $fileNameOutput)
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{
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return $this->yellow->toolbox->getFileModified($fileNameInput)!=$this->yellow->toolbox->getFileModified($fileNameOutput);
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}
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// Check graphics library support
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function isGraphicsLibrary()
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{
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return extension_loaded("gd") && function_exists("gd_info") &&
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((imagetypes()&(IMG_JPG|IMG_PNG))==(IMG_JPG|IMG_PNG));
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}
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}
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$yellow->plugins->register("image", "YellowImage", YellowImage::VERSION);
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?>
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