CViewRenderer

Package	system.web.renderers
Inheritance	abstract class CViewRenderer » CApplicationComponent » CComponent
Implements	IApplicationComponent, IViewRenderer
Subclasses	CPradoViewRenderer
Since	1.0
Source Code	framework/web/renderers/CViewRenderer.php

CViewRenderer is the base class for view renderer classes.

A view renderer is an application component that renders views written in a customized syntax.

Once installing a view renderer as a 'viewRenderer' application component, the normal view rendering process will be intercepted by the renderer. The renderer will first parse the source view file and then render the the resulting view file.

Parsing results are saved as temporary files that may be stored under the application runtime directory or together with the source view file.

Public Properties

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Property	Type	Description	Defined By
behaviors	array	the behaviors that should be attached to this component.	CApplicationComponent
fileExtension	string	the extension name of the view file.	CViewRenderer
filePermission	integer	the chmod permission for temporary directories and files generated during parsing.	CViewRenderer
isInitialized	boolean	Checks if this application component has been initialized.	CApplicationComponent
useRuntimePath	boolean	whether to store the parsing results in the application's runtime directory.	CViewRenderer

Public Methods

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Method	Description	Defined By
__call()	Calls the named method which is not a class method.	CComponent
__get()	Returns a property value, an event handler list or a behavior based on its name.	CComponent
__isset()	Checks if a property value is null.	CComponent
__set()	Sets value of a component property.	CComponent
__unset()	Sets a component property to be null.	CComponent
asa()	Returns the named behavior object.	CComponent
attachBehavior()	Attaches a behavior to this component.	CComponent
attachBehaviors()	Attaches a list of behaviors to the component.	CComponent
attachEventHandler()	Attaches an event handler to an event.	CComponent
canGetProperty()	Determines whether a property can be read.	CComponent
canSetProperty()	Determines whether a property can be set.	CComponent
detachBehavior()	Detaches a behavior from the component.	CComponent
detachBehaviors()	Detaches all behaviors from the component.	CComponent
detachEventHandler()	Detaches an existing event handler.	CComponent
disableBehavior()	Disables an attached behavior.	CComponent
disableBehaviors()	Disables all behaviors attached to this component.	CComponent
enableBehavior()	Enables an attached behavior.	CComponent
enableBehaviors()	Enables all behaviors attached to this component.	CComponent
evaluateExpression()	Evaluates a PHP expression or callback under the context of this component.	CComponent
getEventHandlers()	Returns the list of attached event handlers for an event.	CComponent
getIsInitialized()	Checks if this application component has been initialized.	CApplicationComponent
hasEvent()	Determines whether an event is defined.	CComponent
hasEventHandler()	Checks whether the named event has attached handlers.	CComponent
hasProperty()	Determines whether a property is defined.	CComponent
init()	Initializes the application component.	CApplicationComponent
raiseEvent()	Raises an event.	CComponent
renderFile()	Renders a view file.	CViewRenderer

Protected Methods

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Method	Description	Defined By
generateViewFile()	Parses the source view file and saves the results as another file.	CViewRenderer
getViewFile()	Generates the resulting view file path.	CViewRenderer

Property Details

fileExtension property

public string $fileExtension;

the extension name of the view file. Defaults to '.php'.

filePermission property

public integer $filePermission;

the chmod permission for temporary directories and files generated during parsing. Defaults to 0755 (owner rwx, group rx and others rx).

useRuntimePath property

public boolean $useRuntimePath;

whether to store the parsing results in the application's runtime directory. Defaults to true. If false, the parsing results will be saved as files under the same directory as the source view files and the file names will be the source file names appended with letter 'c'.

Method Details

generateViewFile() method

abstract protected void generateViewFile(string $sourceFile, string $viewFile)
$sourceFile	string	the source view file path
$viewFile	string	the resulting view file path

Source Code: framework/web/renderers/CViewRenderer.php#54 (show)


abstract protected function generateViewFile($sourceFile,$viewFile);

Parses the source view file and saves the results as another file.

getViewFile() method

protected string getViewFile(string $file)
$file	string	source view file path
{return}	string	resulting view file path

Source Code: framework/web/renderers/CViewRenderer.php#84 (show)


protected function getViewFile($file)
{
    if($this->useRuntimePath)
    {
        $crc=sprintf('%x', crc32(get_class($this).Yii::getVersion().dirname($file)));
        $viewFile=Yii::app()->getRuntimePath().DIRECTORY_SEPARATOR.'views'.DIRECTORY_SEPARATOR.$crc.DIRECTORY_SEPARATOR.basename($file);
        if(!is_file($viewFile))
            @mkdir(dirname($viewFile),$this->filePermission,true);
        return $viewFile;
    }
    else
        return $file.'c';
}

Generates the resulting view file path.

renderFile() method

public mixed renderFile(CBaseController $context, string $sourceFile, mixed $data, boolean $return)
$context	CBaseController	the controller or widget who is rendering the view file.
$sourceFile	string	the view file path
$data	mixed	the data to be passed to the view
$return	boolean	whether the rendering result should be returned
{return}	mixed	the rendering result, or null if the rendering result is not needed.

Source Code: framework/web/renderers/CViewRenderer.php#66 (show)


public function renderFile($context,$sourceFile,$data,$return)
{
    if(!is_file($sourceFile) || ($file=realpath($sourceFile))===false)
        throw new CException(Yii::t('yii','View file "{file}" does not exist.',array('{file}'=>$sourceFile)));
    $viewFile=$this->getViewFile($sourceFile);
    if(@filemtime($sourceFile)>@filemtime($viewFile))
    {
        $this->generateViewFile($sourceFile,$viewFile);
        @chmod($viewFile,$this->filePermission);
    }
    return $context->renderInternal($viewFile,$data,$return);
}

Renders a view file. This method is required by IViewRenderer.

User Contributed Notes