diff options
Diffstat (limited to 'framework/Web/UI/WebControls/TClientScriptLoader.php')
| -rw-r--r-- | framework/Web/UI/WebControls/TClientScriptLoader.php | 218 |
1 files changed, 218 insertions, 0 deletions
diff --git a/framework/Web/UI/WebControls/TClientScriptLoader.php b/framework/Web/UI/WebControls/TClientScriptLoader.php new file mode 100644 index 00000000..1c5b9d29 --- /dev/null +++ b/framework/Web/UI/WebControls/TClientScriptLoader.php @@ -0,0 +1,218 @@ +<?php
+/**
+ * TClientScriptLoader class file.
+ *
+ * @author Wei Zhuo <weizhuo[at]gmail[dot]com>
+ * @link http://www.pradosoft.com/
+ * @copyright Copyright © 2007 PradoSoft
+ * @license http://www.pradosoft.com/license/
+ * @version $Id: TClientScriptLoader.php 1827 2007-04-02 06:19:55Z wei $
+ * @package System.Web.UI.WebControls
+ */
+
+/**
+ * The TClientScriptLoader publish a collection of javascript files as assets.
+ * The {@link PackagePath setPackagePath} property can be an existing asset directory
+ * or a namespace path to the directory containing javascript files. E.g.
+ * <code>
+ * <com:TClientScriptLoader PackagePath=<%~ mylib/js %> />
+ * <com:TClientScriptLoader PackagePath="Application.myscripts" />
+ * </code>
+ *
+ * When the files in the {@link PackagePath setPackagePath} are published as assets, a script loader
+ * php file corresponding to TClientScriptLoader::SCRIPT_LOADER is also copied to that asset directory.
+ *
+ * The script loader, combines multiple javascript files and serve up as gzip if possible.
+ * Allowable scripts and script dependencies can be specified in a "packages.php" file
+ * with the following format. This "packages.php" is optional, if absent the filenames
+ * without ".js" extension are used. The "packages.php" must be in the directory given by
+ * {@link PackagePath setPackagePath}.
+ *
+ * <code>
+ * <?php
+ * $packages = array(
+ * 'package1' => array('file1.js', 'file2.js'),
+ * 'package2' => array('file3.js', 'file4.js'));
+ *
+ * $deps = array(
+ * 'package1' => array('package1'),
+ * 'package2' => array('package1', 'package2')); //package2 requires package1 first.
+ *
+ * return array($packages,$deps); //must return $packages and $deps in an array
+ * </code>
+ *
+ * Set the {@link PackageScripts setPackageScripts} property with value 'package1' to serve
+ * up the 'package1' scripts. A maxium of 25 packages separated by commas is allowed.
+ *
+ * Dependencies of the packages are automatically resolved by the script loader php file.
+ * E.g.
+ * <code>
+ * <com:TClientScriptLoader PackagePath=<%~ mylib/js %> PackageScripts="package2" />
+ * </code>
+ *
+ * The {@link setDebugMode DebugMode} property when false
+ * removes comments and whitespaces from the published javascript files. If
+ * the DebugMode property is not set, the debug mode is determined from the application mode.
+ *
+ * The {@link setEnableGzip EnableGzip} property (default is true) enables the
+ * published javascripts to be served as zipped if the browser and php server allows it.
+
+ * If the DebugMode is false either explicitly or when the application mode is non-debug,
+ * then cache headers are also sent to inform the browser and proxies to cache the file.
+ * Moreover, the post-processed (comments removed and zipped) are saved in the assets
+ * directory for the next requests. That is, in non-debug mode the scripts are cached
+ * in the assets directory until they are deleted.
+ *
+ * @author Wei Zhuo<weizhuo[at]gmail[dot]com>
+ * @version $Id$
+ * @package System.Web.WebControls
+ * @since 3.1
+ */
+class TClientScriptLoader extends TWebControl
+{
+ const SCRIPT_LOADER = 'Web/Javascripts/clientscripts.php';
+
+ /**
+ * @return string tag name of the script element
+ */
+ protected function getTagName()
+ {
+ return 'script';
+ }
+
+ /**
+ * Adds attribute name-value pairs to renderer.
+ * This overrides the parent implementation with additional button specific attributes.
+ * @param THtmlWriter the writer used for the rendering purpose
+ */
+ protected function addAttributesToRender($writer)
+ {
+ $writer->addAttribute('type','text/javascript');
+ $writer->addAttribute('src',$this->getClientScriptUrl());
+ parent::addAttributesToRender($writer);
+ }
+
+ /**
+ * @return string clientscript.php url.
+ */
+ protected function getClientScriptUrl()
+ {
+ $baseUrl = $this->publishScriptLoader();
+ $scripts = split('/\s*[, ]+\s*/', $this->getPackageScripts());
+ $url = $baseUrl . '?js=' . implode(',', $scripts);
+ if($this->getDebugMode()!==false && $this->getApplication()->getMode()===TApplicationMode::Debug)
+ $url.='&mode=debug';
+ if($this->getEnableGzip()===false)
+ $url.='&gzip=false';
+ return $url;
+ }
+
+ /**
+ * Copies the client script loader php file to the asset directory if appropriate.
+ * @return string clientscript.php url
+ * @throws TConfigurationException if error in publishing the package path.
+ */
+ protected function publishScriptLoader()
+ {
+ list($path, $url) = $this->getPublishedPackagePath();
+ if(is_dir($path))
+ {
+ $scriptLoader = Prado::getFrameworkPath().'/'.self::SCRIPT_LOADER;
+ $scriptLoaderFile = basename($scriptLoader);
+ $dest = $path.'/'.$scriptLoaderFile;
+ if(!is_file($dest))
+ copy($scriptLoader,$dest);
+ return $url.'/'.$scriptLoaderFile;
+ }
+ else
+ throw new TConfigurationException('clientscript_invalid_package_path',
+ $this->getPackagePath(), $this->getUniqueID());
+ }
+
+ /**
+ * Publishes the package path assets, tries path as namespace first.
+ * @return array tuple ($path, $url).
+ */
+ protected function getPublishedPackagePath()
+ {
+ $assets = $this->getApplication()->getAssetManager();
+ //assumes dot path first
+ $dir = Prado::getPathOfNameSpace($this->getPackagePath());
+ if(!is_null($dir))
+ {
+ $url = $assets->publishFilePath($dir); //show throw an excemption if invalid
+ return array($dir, $url);
+ }
+ $url = $this->getPackagePath();
+ $packageDir = str_replace($assets->getBaseUrl(), '', $url);
+ return array($assets->getBasePath().$packageDir,$url);
+ }
+
+ /**
+ * @param string custom javascript library directory.
+ */
+ public function setPackagePath($value)
+ {
+ $this->setViewState('PackagePath', $value);
+ }
+
+ /**
+ * @return string custom javascript library directory.
+ */
+ public function getPackagePath()
+ {
+ return $this->getViewState('PackagePath');
+ }
+
+ /**
+ * @param string load specific packages from the javascript library in the PackagePath,
+ * comma delimited package names. A maximum of 25 packages is allowed.
+ */
+ public function setPackageScripts($value)
+ {
+ $this->setViewState('PackageScripts', $value,'');
+ }
+
+ /**
+ * @return string comma delimited list of javascript library packages to load.
+ */
+ public function getPackageScripts()
+ {
+ return $this->getViewState('PackageScripts','');
+ }
+
+ /**
+ * @param boolean enables gzip compression of the javascript.
+ */
+ public function setEnableGzip($value)
+ {
+ $this->setViewState('EnableGzip', TPropertyValue::ensureBoolean($value), true);
+ }
+
+ /**
+ * @return boolean enables gzip compression of the javascript if possible, default is true.
+ */
+ public function getEnableGzip()
+ {
+ return $this->getViewState('EnableGzip', true);
+ }
+
+ /**
+ * @return boolean javascript comments stripped in non-debug mode.
+ * Debug mode will depend on the application mode if null.
+ */
+ public function getDebugMode()
+ {
+ return $this->getViewState('DebugMode');
+ }
+
+ /**
+ * @param boolean true to enable debug mode, default is null thus dependent on the application mode.
+ */
+ public function setDebugMode($value)
+ {
+ $this->setViewState('DebugMode', TPropertyValue::ensureBoolean($value), null);
+ }
+}
+
+?>
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