/**
* Generates image previews with alternate text, title and lightbox pop-up activation on mouse click.
* @param string $body Data associated with the gallery.
* @param string $paramstring A whitespace-separated list of name="value" parameter values.
*/
private function getImageGalleryHtml($body, $params = array())
{
// set gallery parameters
$this->curparams = clone $this->defparams;
// parameters set in back-end
if (is_array($params)) {
$this->curparams->setArray($params);
} else {
$paramstring = htmlspecialchars_decode((string) $params);
$this->curparams->setString($paramstring);
// parameters set inline
}
if (!isset($body)) {
// path is set via parameter with compact activation syntax
$body = $this->curparams->path;
}
$engineservices = SIGPlusEngineServices::instance();
// generate link to an existing gallery
if ($this->curparams->link !== false) {
$lightbox = $engineservices->getLightboxEngine($this->curparams->lightbox);
// get selected lightbox engine if any or use default
if ($lightbox && ($linkscript = $lightbox->getLinkScript($this->curparams->link, $this->curparams->index)) !== false) {
return '<a href="javascript:void(' . htmlspecialchars($linkscript) . ')">' . $body . '</a>';
} else {
// engine does not support programmatic activation
return $body;
}
}
// set gallery folders
$imageref = $body;
// a relative path to an image folder or an image, or an absolute URL to an image to display
if ($isremote = is_remote_path($imageref)) {
$imageurl = $imageref;
$iswebalbum = (bool) preg_match('"^https?://picasaweb.google.com/data/feed/(?:api|base)/user/([^/?#]+)/albumid/([^/?#]+)"', $imageurl);
// test for Picasa galleries
$imagehashbase = $imageurl;
} else {
$imageref = trim($imageref, '/');
// remove leading and trailing backslash
// verify validity of relative path
$imagepath = $this->imageservices->getImagePath($imageref);
if (!file_exists($imagepath)) {
throw new SIGPlusImageGalleryFolderException($imageref);
}
$imagehashbase = $imagepath;
// base in computing hash for content caching
}
// set gallery identifier
if ($this->curparams->id) {
// use user-supplied identifier
$galleryid = $this->curparams->id;
} else {
// automatically generate identifier for thumbnail gallery
$galleryid = 'sigplus_' . md5($imagehashbase);
}
$galleryid = $this->getUniqueGalleryId($galleryid);
// force meaningful settings for single-image view (disable slider and activate flow layout)
if ($this->curparams->layout != 'hidden' && ($isremote && !$iswebalbum || isset($imagepath) && is_file($imagepath))) {
$this->curparams->layout = 'flow';
$this->curparams->rows = false;
$this->curparams->cols = false;
$this->curparams->slider = false;
}
// substitute proper left or right alignment depending on whether language is LTR or RTL
$language = JFactory::getLanguage();
$this->curparams->alignment = str_replace(array('after', 'before'), $language->isRTL() ? array('left', 'right') : array('right', 'left'), $this->curparams->alignment);
// get selected slider engine if any, or use default
$slider = $engineservices->getSliderEngine($this->curparams->slider);
if (!$slider) {
$this->curparams->progressive = false;
// progressive loading is not supported unless a slider is enabled
}
// *** cannot update $this->curparams, which is used in content caching, beyond this point *** //
// initialize logging
if (SIGPLUS_LOGGING) {
$logging = SIGPlusLogging::instance();
if ($isremote) {
$logging->append('Generating gallery "' . $galleryid . '" from URL: <kbd>' . $imageurl . '</kbd>');
} else {
$logging->append('Generating gallery "' . $galleryid . '" from file/directory: <kbd>' . $imagepath . '</kbd>');
}
$logging->appendblock('Local parameters for "' . $galleryid . '" are:', print_r($this->curparams, true));
}
// verify if content is available in cache folder
if (!SIGPLUS_CONTENT_CACHING || $engineservices->debug || $this->curparams->hasRandom()) {
$cachekey = false;
// galleries that involve a random element cannot be cached
} elseif (($cachekey = $this->imageservices->getCachedContent($imagehashbase, $this->curparams)) !== false) {
if (SIGPLUS_LOGGING) {
$logging->append('Retrieving cached content with key <kbd>' . $cachekey . '</kbd>.');
}
}
// generate gallery HTML code or setup script
if ($cachekey === false) {
// save default title and description, which might be overridden in labels file, affecting hash key used in caching
$deftitle = $this->curparams->deftitle;
$defdescription = $this->curparams->defdescription;
if ($isremote) {
// access images remote domain
if ($iswebalbum) {
$htmlorscript = $this->getPicasaImageGallery($imageurl, $galleryid);
} else {
$extension = strtolower(pathinfo(parse_url($imageurl, PHP_URL_PATH), PATHINFO_EXTENSION));
switch ($extension) {
case 'gif':
case 'jpg':
case 'jpeg':
case 'png':
// plug-in syntax {gallery}http://example.com/image.jpg{/gallery}
$labels = array(new SIGPlusImageLabel($imageurl, false, false));
// artificial single-entry labels file
$htmlorscript = $this->getUserDefinedRemoteImageGallery($labels, $galleryid);
break;
default:
// plug-in syntax {gallery}http://example.com{/gallery}
throw new SIGPlusNotSupportedException();
$labels = $this->imageservices->getLabels($imageurl, $this->curparams->labels, $this->curparams->deftitle, $this->curparams->defdescription);
switch ($this->curparams->sortcriterion) {
case SIGPLUS_SORT_RANDOMLABELS:
shuffle($labels);
// fall through
// fall through
case SIGPLUS_SORT_LABELS_OR_FILENAME:
case SIGPLUS_SORT_LABELS_OR_MTIME:
$htmlorscript = $this->getUserDefinedRemoteImageGallery($labels, $galleryid);
}
}
}
} else {
if (is_file($imagepath)) {
// syntax {gallery}folder/subfolder/file.jpg{/gallery}
$htmlorscript = $this->getUnlabeledImageGallery(dirname($imagepath), array(basename($imagepath)), $galleryid);
} else {
// syntax {gallery}folder/subfolder{/gallery}
// fetch image labels
switch ($this->curparams->labels) {
case 'filename':
$labels = $this->imageservices->getLabelsFromFilenames($imagepath);
break;
default:
$labels = $this->imageservices->getLabels($imagepath, $this->curparams->labels, $this->curparams->deftitle, $this->curparams->defdescription);
}
switch ($this->curparams->sortcriterion) {
case SIGPLUS_SORT_LABELS_OR_FILENAME:
if (empty($labels)) {
// there is no labels file to use
$files = $this->imageservices->getListing($imagepath, SIGPLUS_FILENAME, $this->curparams->sortorder, $this->curparams->depth);
$htmlorscript = $this->getUnlabeledImageGallery($imagepath, $files, $galleryid);
} else {
$htmlorscript = $this->getUserDefinedImageGallery($imagepath, $labels, $galleryid);
}
break;
case SIGPLUS_SORT_LABELS_OR_MTIME:
if (empty($labels)) {
$files = $this->imageservices->getListing($imagepath, SIGPLUS_MTIME, $this->curparams->sortorder, $this->curparams->depth);
$htmlorscript = $this->getUnlabeledImageGallery($imagepath, $files, $galleryid);
} else {
$htmlorscript = $this->getUserDefinedImageGallery($imagepath, $labels, $galleryid);
}
break;
case SIGPLUS_SORT_MTIME:
$files = $this->imageservices->getListing($imagepath, SIGPLUS_MTIME, $this->curparams->sortorder, $this->curparams->depth);
$htmlorscript = $this->getLabeledImageGallery($imagepath, $files, $labels, $galleryid);
break;
case SIGPLUS_SORT_RANDOM:
$files = $this->imageservices->getListing($imagepath, SIGPLUS_RANDOM, $this->curparams->sortorder, $this->curparams->depth);
$htmlorscript = $this->getLabeledImageGallery($imagepath, $files, $labels, $galleryid);
break;
case SIGPLUS_SORT_RANDOMLABELS:
if (empty($labels)) {
// there is no labels file to use
$files = $this->imageservices->getListing($imagepath, SIGPLUS_RANDOM, $this->curparams->sortorder, $this->curparams->depth);
$htmlorscript = $this->getUnlabeledImageGallery($imagepath, $files, $galleryid);
} else {
shuffle($labels);
$htmlorscript = $this->getUserDefinedImageGallery($imagepath, $labels, $galleryid);
}
break;
default:
// case SIGPLUS_SORT_FILENAME:
$files = $this->imageservices->getListing($imagepath, SIGPLUS_FILENAME, $this->curparams->sortorder, $this->curparams->depth);
$htmlorscript = $this->getLabeledImageGallery($imagepath, $files, $labels, $galleryid);
break;
}
}
}
if (!empty($htmlorscript)) {
switch ($this->curparams->linkage) {
case 'inline':
$cachedata = ($slider !== false ? '<ul style="visibility:hidden;">' : '<ul>') . implode($htmlorscript) . '</ul>';
break;
case 'head':
// put generated content in HTML head (does not allow HTML body with bloating size, which would cause preg_replace in System - SEF to fail)
$cachedata = $this->getGalleryScript($galleryid, $htmlorscript);
break;
case 'external':
$cachedata = '__jQuery__(function () { ' . $this->getGalleryScript($galleryid, $htmlorscript) . ' });';
break;
}
} else {
$cachedata = false;
}
// restore default title and description, which might have been overridden in labels file
$this->curparams->deftitle = $deftitle;
$this->curparams->defdescription = $defdescription;
if (SIGPLUS_CONTENT_CACHING && !$this->curparams->hasRandom()) {
// save generated content for future re-use in a temporary file in the cache folder
$this->imageservices->cleanCachedContent();
$cachekey = $this->imageservices->saveCachedContent($imagehashbase, $this->curparams, $cachedata);
if (SIGPLUS_LOGGING) {
if ($cachekey !== false) {
$logging->append('Saved cached content with key <kbd>' . $cachekey . '</kbd>.');
} else {
$logging->append('Failed to persist content in cache folder.');
}
}
}
} elseif ($this->curparams->linkage != 'external') {
// retrieve content from cache but no need to fetch content for linking external .js file
$cachefile = $this->imageservices->getCachedContentPath($cachekey, $this->curparams->linkage == 'inline' ? '.html' : '.js');
if (filesize($cachefile) > 0) {
$cachedata = file_get_contents($cachefile);
} else {
$cachedata = false;
// empty gallery
}
} else {
$cachedata = true;
}
if ($cachedata === false) {
// no content
$html = JText::_('SIGPLUS_EMPTY');
} else {
switch ($this->curparams->linkage) {
case 'inline':
$html = $cachedata;
// content produced as HTML only in inline linkage mode
break;
case 'head':
$this->addGalleryScript();
// add gallery population script
$engineservices->addOnReadyScript($cachedata);
// add gallery data
$html = '';
// no content produced in HTML except for placeholder
break;
case 'external':
$this->addGalleryScript();
if ($cachekey !== false) {
// include reference to generated script in external .js file
$document = JFactory::getDocument();
$document->addScript($this->imageservices->getCachedContentUrl($cachekey, '.js'));
} else {
// add script to document head as a fall-back if could not save to external .js file in cache folder
$engineservices->addOnReadyScript($cachedata);
}
$html = '';
break;
}
}
// set image gallery alignment (left, center or right) and style
$gallerystyle = 'sigplus-gallery';
switch ($this->curparams->alignment) {
case 'left':
case 'left-clear':
case 'left-float':
$gallerystyle .= ' sigplus-left';
break;
case 'center':
$gallerystyle .= ' sigplus-center';
break;
case 'right':
case 'right-clear':
case 'right-float':
$gallerystyle .= ' sigplus-right';
break;
}
switch ($this->curparams->alignment) {
case 'left':
case 'left-float':
case 'right':
case 'right-float':
$gallerystyle .= ' sigplus-float';
break;
case 'left-clear':
case 'right-clear':
$gallerystyle .= ' sigplus-clear';
break;
}
switch ($this->curparams->imagecaptions) {
case 'above':
$gallerystyle .= ' sigplus-captionsabove';
break;
case 'below':
$gallerystyle .= ' sigplus-captionsbelow';
break;
}
// output image gallery or gallery placeholder
$div_attrs = array('id' => $galleryid, 'class' => $gallerystyle);
if ($this->curparams->layout == 'hidden') {
$div_attrs['style'] = 'display:none !important;';
}
$html = make_html('div', $div_attrs, $html);
// add style and script declarations
$this->addStylesAndScripts($galleryid);
$this->curparams = false;
return $html;
}
/**
* Fired when contents are to be processed by the plug-in.
* Recommended usage syntax:
* a) POSIX fully portable file names
* Folder name characters are in [A-Za-z0-9._-])
* Regular expression: [/\w.-]+
* Example: {gallery rows=1 cols=1} /sigplus/birds/ {/gallery}
* b) URL-encoded absolute URLs
* Regular expression: (?:[0-9A-Za-z!"$&\'()*+,.:;=@_-]|%[0-9A-Za-z]{2})+
* Example: {gallery} http://example.com/image.jpg {/gallery}
*/
function onContentPrepare($context, &$article, &$params, $limitstart)
{
// skip plug-in activation when the content is being indexed
if ($context === 'com_finder.indexer') {
return;
}
if (strpos($article->text, '{' . $this->activationtag) === false) {
return;
/* short-circuit plugin activation */
}
// reset low-level lightbox-only mode
$this->lowlevel = false;
if (SIGPLUS_LOGGING) {
$logging = SIGPlusLogging::instance();
$logging->append('<strong>sigplus is currently running in logging mode</strong>. This should be turned off in a production environment by setting the constant SIGPLUS_LOGGING in <kbd>sigplus.php</kbd> to <kbd>false</kbd>, in which case this message will also disappear.');
}
// load language file for internationalized labels and error messages
$lang = JFactory::getLanguage();
$lang->load('plg_content_sigplus', JPATH_ADMINISTRATOR);
try {
// on-demand instantiation
if (!isset($this->core)) {
$this->core = new SIGPlusCore($this->configuration);
}
// find gallery tags and emit code
$activationtag = preg_quote($this->activationtag, '#');
$article->text = preg_replace_callback('#[{]' . $activationtag . '([^{}]*)(?<!/)[}]\\s*((?:[^{]+|[{](?!/' . $activationtag . '))+)\\s*[{]/' . $activationtag . '[}]#', array($this, 'getGalleryRegexReplacementExpanded'), $article->text, -1);
$article->text = preg_replace_callback('#[{]' . $activationtag . '([^{}]*)/[}]#', array($this, 'getGalleryRegexReplacementCollapsed'), $article->text, -1);
$this->core->addGalleryEngines($this->lowlevel);
} catch (Exception $e) {
$app = JFactory::getApplication();
$app->enqueueMessage($e->getMessage(), 'error');
$article->text = $e->getMessage() . $article->text;
}
if (SIGPLUS_LOGGING) {
$article->text = $logging->fetch() . $article->text;
}
}
