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<?php defined("SYSPATH") or die("No direct script access.");
/**
* Gallery - a web based photo album viewer and editor
* Copyright (C) 2000-2011 Bharat Mediratta
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
*/
class Gallery_View_Core extends View {
protected $theme_name = null;
protected $combine_queue = array();
/**
* Provide a url to a resource within the current theme. This allows us to refer to theme
* resources without naming the theme itself which makes themes easier to copy.
*/
public function url($path, $absolute_url=false) {
$arg = "themes/{$this->theme_name}/$path";
return $absolute_url ? url::abs_file($arg) : url::file($arg);
}
/**
* Begin gather up scripts or css files so that they can be combined into a single request.
*
* @param $types a comma separated list of types to combine, eg "script,css"
*/
public function start_combining($types) {
foreach (explode(",", $types) as $type) {
$this->combine_queue[$type] = array();
}
}
/**
* If script combining is enabled, add this script to the list of scripts that will be
* combined into a single script element. When combined, the order of scripts is preserved.
*
* @param $file the file name or path of the script to include. If a path is specified then
* it needs to be relative to DOCROOT. Just specifying a file name will result
* in searching Kohana's cascading file system.
* @param $group the group of scripts to combine this with. defaults to "core"
*/
public function script($file, $group="core") {
if (($path = gallery::find_file("js", $file, false))) {
if (isset($this->combine_queue["script"])) {
$this->combine_queue["script"][$group][$path] = 1;
} else {
return html::script($path);
}
} else {
Kohana_Log::add("error", "Can't find script file: $file");
}
}
/**
* If css combining is enabled, add this css to the list of css that will be
* combined into a single style element. When combined, the order of style elements
* is preserved.
*
* @param $file the file name or path of the css to include. If a path is specified then
* it needs to be relative to DOCROOT. Just specifying a file name will result
* in searching Kohana's cascading file system.
* @param $group the group of css to combine this with. defaults to "core"
*/
public function css($file, $group="core") {
if (($path = gallery::find_file("css", $file, false))) {
if (isset($this->combine_queue["css"])) {
$this->combine_queue["css"][$group][$path] = 1;
} else {
return html::stylesheet($path);
}
} else {
Kohana_Log::add("error", "Can't find css file: $file");
}
}
/**
* Combine a series of files into a single one and cache it in the database.
* @param $type the data type (script or css)
* @param $group the group of scripts or css we want
*/
public function get_combined($type, $group="core") {
$links = array();
if (empty($this->combine_queue[$type][$group])) {
return;
}
// Include the url in the cache key so that if the Gallery moves, we don't use old cached
// entries.
$key = array(url::abs_file(""));
foreach (array_keys($this->combine_queue[$type][$group]) as $path) {
$stats = stat($path);
// 7 == size, 9 == mtime, see http://php.net/stat
$key[] = "$path $stats[7] $stats[9]";
}
$key = md5(join(" ", $key));
$cache = Cache::instance();
$contents = $cache->get($key);
if (empty($contents)) {
$contents = "";
foreach (array_keys($this->combine_queue[$type][$group]) as $path) {
if ($type == "css") {
$contents .= "/* $path */\n" . $this->process_css($path) . "\n";
} else {
$contents .= "/* $path */\n" . file_get_contents($path) . "\n";
}
}
$cache->set($key, $contents, array($type), 30 * 84600);
$use_gzip = function_exists("gzencode") &&
(int) ini_get("zlib.output_compression") === 0;
if ($use_gzip) {
$cache->set("{$key}_gz", gzencode($contents, 9, FORCE_GZIP),
array($type, "gzip"), 30 * 84600);
}
}
unset($this->combine_queue[$type][$group]);
if ($type == "css") {
return html::stylesheet("combined/css/$key", "screen,print,projection", true);
} else {
return html::script("combined/javascript/$key", true);
}
}
/**
* Convert relative references inside a CSS file to absolute ones so that when it's served from
* a new location as part of a combined bundle the references are still correct.
* @param string the path to the css file
*/
private function process_css($css_file) {
static $PATTERN = "#url\(\s*['|\"]{0,1}(.*?)['|\"]{0,1}\s*\)#";
$docroot_length = strlen(DOCROOT);
$css = file_get_contents($css_file);
if (preg_match_all($PATTERN, $css, $matches, PREG_SET_ORDER)) {
$search = $replace = array();
foreach ($matches as $match) {
$relative = dirname($css_file) . "/$match[1]";
if (!empty($relative)) {
$search[] = $match[0];
$replace[] = "url('" . url::abs_file($relative) . "')";
} else {
Kohana_Log::add("error", "Missing URL reference '{$match[1]}' in CSS file '$css_file'");
}
}
$replace = str_replace(DIRECTORY_SEPARATOR, "/", $replace);
$css = str_replace($search, $replace, $css);
}
$imports = preg_match_all("#@import\s*['|\"]{0,1}(.*?)['|\"]{0,1};#",
$css, $matches, PREG_SET_ORDER);
if ($imports) {
$search = $replace = array();
foreach ($matches as $match) {
$search[] = $match[0];
$replace[] = $this->process_css(dirname($css_file) . "/$match[1]");
}
$css = str_replace($search, $replace, $css);
}
return $css;
}
}
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