Erstes großes Refactoring
* alle gemeinsamen Funktionen in includes/galleryfunctions.php zusammengeführt (fixes #21) * AJAX-Requests werden in ajaxrequest.php behandelt und liefern zusätzlich zum Titel auch die URLs des Vorschau- und des Vollbildes (fixes #22), die übergebenen Request-Parameter werden syntaktisch geprüft (fixes #23) * Die Vorschau- und Thumbnail-Bilder werden in der Funktion getScaledImage() in includes/galleryfunctions.php generiert und im Filesystem abgelegt (fixes #10) * Bildbeschreibungen sind jetzt in einem .ini-Format in bilder/example/galleryinfo.ini in der Sektion "images" definiert (addresses #20) * Rendern der Menüpunkte in index.php und includes/galleryfunctions.php vorbereitet (addresses #16) * Die AJAX-Aufrufe und Pfadberechnungen in scripts/ourhandlers.js wurden korrigiert und an die neue AJAX-Handler-URL angepasst (addresses #22, fixes #19) * Beispielbilder in Unterverzeichnis ''bilder/example'' verschoben und die Möglichkeit vorgesehen in ''bilder/galleryinfo.ini'' eine Standardgallerie anzugeben (fixes #24, addresses #20, #16)
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19 changed files with 435 additions and 428 deletions
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includes/galleryfunctions.php
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includes/galleryfunctions.php
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<?php
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/**
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* Diese Datei stellt die verschiedenen Funktionen für den Aufbau der
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* Bildergallerie zur Verfügung.
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*
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* Copyright (c) 2007, 2008 Jan Dittberner <jan@dittberner.info>
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* Jan Dittberner IT-Consulting & -Solutions,
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* Cottbuser Str. 1, D-01129 Dresden
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*
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* This file is part of the ScrollingJQueryGallery component of the
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* gnuviech-server.de Websitetools
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*
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* ScrollingJQueryGallery is free software: you can redistribute it
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* and/or modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* ScrollingJQueryGallery is distributed in the hope that it will be
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* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with ScrollingJQueryGallery. If not, see
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* <http://www.gnu.org/licenses/>.
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*
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* Version: $Id$
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*/
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define(GALLERYPREFIX, "bilder");
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define(INFOFILE, "galleryinfo.ini");
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define(IMAGESEC, "images");
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define(GALLERYSEC, "gallery");
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define(GALLERY_RE, '/^[\w\d _-]+$/');
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$previewwidth = 311;
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$thumbheight = 67;
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function galleryExists($galleryname) {
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return preg_match(GALLERY_RE, $galleryname) &&
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realpath(GALLERYPREFIX . DIRECTORY_SEPARATOR . $galleryname);
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}
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function getGalleryConfig($galleryname = null) {
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if ($galleryname) {
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$filepath = realpath(GALLERYPREFIX . DIRECTORY_SEPARATOR .
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$galleryname . DIRECTORY_SEPARATOR . INFOFILE);
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} else {
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$filepath = realpath(GALLERYPREFIX . DIRECTORY_SEPARATOR . INFOFILE);
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}
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if (is_file($filepath)) {
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return parse_ini_file($filepath, true);
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}
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return array();
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}
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/**
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* Holt die Bildinformationen zu einem Bild aus der Datei
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* bilder/imginfo.txt und gibt diese zurueck.
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*
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* @param $imagename Bildname
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* @param $galleryname Galleriename
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*/
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function getImgInfo($galleryname, $imagename) {
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return array("name" => $imagename,
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"data" => getImageLabel($galleryname, $imagename),
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"preview" => GALLERYPREFIX . DIRECTORY_SEPARATOR .
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getScaledImage($galleryname, $imagename,
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$GLOBALS["previewwidth"], false),
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"full" => GALLERYPREFIX . DIRECTORY_SEPARATOR . $galleryname .
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DIRECTORY_SEPARATOR . $imagename
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);
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}
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function getImageLabel($galleryname, $imagename) {
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$gallerypath = realpath(GALLERYPREFIX . DIRECTORY_SEPARATOR . $galleryname);
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if (empty($gallerypath) || !is_dir($gallerypath)) {
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return false;
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}
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$filepath = $gallerypath . DIRECTORY_SEPARATOR . $imagename;
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if (!is_file($filepath)) {
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return false;
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}
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$inidata = getGalleryConfig($galleryname);
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$value = $inidata[IMAGESEC][$imagename];
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if ($value) {
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return $value;
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}
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return $imagename;
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}
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/**
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* Liefert die aktuelle Gallerie. Die Gallerie kann entweder im
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* GET-Parameter "galleryname" stehen, in der "gallery"-Sektion der
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* zentralen galleryinfo.ini angegeben werden oder es wird das erste
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* Unterverzeichnis von GALLERYPREFIX verwendet.
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*/
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function getCurrentGallery() {
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if (galleryExists($_GET["galleryname"])) {
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return $_GET["galleryname"];
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}
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$filepath = realpath(GALLERYPREFIX . DIRECTORY_SEPARATOR . INFOFILE);
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if (!empty($filepath)) {
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$inidata = getGalleryConfig();
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if (galleryExists($inidata[GALLERYSEC]["default"])) {
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return $inidata[GALLERYSEC]["default"];
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}
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}
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foreach (glob(realpath(GALLERYPREFIX) . DIRECTORY_SEPARATOR . '*',
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GLOB_ONLYDIR) as $directory) {
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$basename = basename($directory);
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if (galleryExists($basename)) {
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return $basename;
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}
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}
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return null;
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}
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function getScaledImage($galleryname, $basename, $maxdim, $scaleheight=true) {
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if ($maxdim == 0) {
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debug_print_backtrace();
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}
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$gallerydir = realpath(GALLERYPREFIX . DIRECTORY_SEPARATOR . $galleryname);
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if ($scaleheight) {
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$scaleddir = sprintf("%s%sscaled_x%d", $galleryname,
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DIRECTORY_SEPARATOR, $maxdim);
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} else {
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$scaleddir = sprintf("%s%sscaled%dx_", $galleryname,
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DIRECTORY_SEPARATOR, $maxdim);
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}
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$scaleddirpath = GALLERYPREFIX . DIRECTORY_SEPARATOR . $scaleddir;
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if (!is_dir($scaleddirpath)) {
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// versuchen das Thumbnail-Verzeichnis anzulegen
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$mkdir = @mkdir($scaleddirpath, 0755);
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if (!$mkdir) {
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return $galleryname . DIRECTORY_SEPARATOR . $basename;
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}
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}
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$scaledimage = $scaleddirpath . DIRECTORY_SEPARATOR . $basename;
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if (!is_file($scaledimage)) {
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// Datei erzeugen
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$originalfile = $gallerydir . DIRECTORY_SEPARATOR . $basename;
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$origimage = imagecreatefromjpeg($originalfile);
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$origx = imagesx($origimage);
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$origy = imagesy($origimage);
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if ($scaleheight) {
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$scaleratio = $origy / (1.0 * $maxdim);
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$newy = $maxdim;
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$newx = (int) $origx / $scaleratio;
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} else {
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$scaleratio = $origx / (1.0 * $maxdim);
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$newx = $maxdim;
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$newy = (int) $origy / $scaleratio;
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}
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$newimage = imagecreatetruecolor($newx, $newy);
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imagecopyresampled($newimage, $origimage, 0, 0, 0, 0, $newx, $newy,
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$origx, $origy);
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imagejpeg($newimage, $scaledimage, 90);
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}
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return $scaleddir . DIRECTORY_SEPARATOR . $basename;
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}
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/**
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* Gibt die Informationen über Vorschaubilder zurück.
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*
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* @return array das erste Element ist die aufsummierte Breite der
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* Einzelbilder und das zweite Element ist ein assoziatives Array mit
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* den Bildnamen als Keys und dem Ergebnis von getimagesize() als
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* Werten
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*/
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function getThumbNailInfo($galleryname) {
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$thumbsizes = array();
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$thumbwidthsum = 2;
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foreach (glob(realpath(GALLERYPREFIX . DIRECTORY_SEPARATOR .
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$galleryname) . DIRECTORY_SEPARATOR .
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'*.jp{e,}g', GLOB_BRACE) as $filename) {
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$basename = basename($filename);
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$thumbfile = getScaledImage($galleryname, $basename,
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$GLOBALS["thumbheight"]);
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if ($thumbsize = getimagesize(realpath(GALLERYPREFIX .
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DIRECTORY_SEPARATOR .
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$thumbfile))) {
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$thumbsizes[$basename] = array($thumbfile, $thumbsize);
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$thumbwidthsum = $thumbwidthsum + $thumbsize[0] + 3;
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}
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}
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return array($thumbwidthsum, $galleryname, $thumbsizes);
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}
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function getGalleryLinks() {
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}
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function showThumbnails(&$thumbinfo) {
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foreach ($thumbinfo[2] as $basename => $data) {
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printf("<div class=\"thumbnail\"><img src=\"%s\" alt=\"\" \"%s\" /></div>",
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GALLERYPREFIX . DIRECTORY_SEPARATOR . $data[0],
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$data[1][3]);;
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}
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}
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function showPreview(&$thumbinfo) {
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foreach ($thumbinfo[2] as $basename => $data) {
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$galleryname = $thumbinfo[1];
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$fullname = GALLERYPREFIX . DIRECTORY_SEPARATOR . $galleryname .
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DIRECTORY_SEPARATOR . $basename;
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$scaledimage = getScaledImage($galleryname, $basename,
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$GLOBALS["previewwidth"], false);
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$scaledimagesize = getimagesize(realpath(GALLERYPREFIX .
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DIRECTORY_SEPARATOR .
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$scaledimage));
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printf("<a href=\"%s\" class=\"lightbox\" ><img id=\"contentimg\" src=\"%s%s%s\" alt=\"%s\" %s /></a>",
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$fullname, GALLERYPREFIX, DIRECTORY_SEPARATOR, $scaledimage,
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getImageLabel($galleryname, $basename), $scaledimagesize[3]);
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break;
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}
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}
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function renderDescription(&$thumbinfo) {
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foreach ($thumbinfo[2] as $basename => $data) {
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print htmlentities(getImageLabel($thumbinfo[1], $basename));
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break;
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}
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}
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