net_instaweb::JsDeferDisabledFilter Class Reference

#include "js_defer_disabled_filter.h"

Inheritance diagram for net_instaweb::JsDeferDisabledFilter:

Public Member Functions
	JsDeferDisabledFilter (RewriteDriver *driver)
virtual void	DetermineEnabled (GoogleString *disabled_reason)
virtual const char *	Name () const
	The name of this filter – used for logging and debugging.
ScriptUsage	GetScriptUsage () const override
Public Member Functions inherited from net_instaweb::CommonFilter
	CommonFilter (RewriteDriver *driver)
const GoogleUrl &	base_url () const
	Getters. More...
const GoogleUrl &	decoded_base_url () const
RewriteDriver *	driver () const
HtmlElement *	noscript_element () const
void	InsertNodeAtBodyEnd (HtmlNode *data)
virtual void	StartDocument ()
	Note: Don't overload these methods, overload the implementers instead!
virtual void	StartElement (HtmlElement *element)
virtual void	EndElement (HtmlElement *element)
virtual void	Characters (HtmlCharactersNode *characters)
ResourcePtr	CreateInputResource (StringPiece input_url, RewriteDriver::InputRole role, bool *is_authorized)
ResourcePtr	CreateInputResourceOrInsertDebugComment (StringPiece input_url, RewriteDriver::InputRole role, HtmlElement *element)
void	ResolveUrl (StringPiece input_url, GoogleUrl *out_url)
bool	IsRelativeUrlLoadPermittedByCsp (StringPiece url, CspDirective role)
bool	BaseUrlIsValid () const
bool	DebugMode () const
bool	CanAddPagespeedOnloadToImage (const HtmlElement &)
virtual void	LogFilterModifiedContent ()
virtual RewriteDriver::InlineAuthorizationPolicy	AllowUnauthorizedDomain () const
virtual bool	IntendedForInlining () const
void	AddJsToElement (StringPiece js, HtmlElement *script)
Public Member Functions inherited from net_instaweb::EmptyHtmlFilter
virtual void	Cdata (HtmlCdataNode *cdata)
	Called for CDATA blocks (e.g. <![CDATA[foobar]]>)
virtual void	Comment (HtmlCommentNode *comment)
	Called for HTML comments that aren't IE directives (e.g. ).
virtual void	IEDirective (HtmlIEDirectiveNode *directive)
virtual void	Directive (HtmlDirectiveNode *directive)
	Called for HTML directives (e.g. <!doctype foobar>).
virtual void	Flush ()
virtual bool	CanModifyUrls ()
ScriptUsage	GetScriptUsage () const override
Public Member Functions inherited from net_instaweb::HtmlFilter
virtual void	RenderDone ()
bool	is_enabled () const
void	set_is_enabled (bool is_enabled)

Static Public Member Functions
static void	InitStats (Statistics *statistics)
static void	Terminate ()
static bool	ShouldApply (RewriteDriver *driver)
Static Public Member Functions inherited from net_instaweb::CommonFilter
static bool	ExtractMetaTagDetails (const HtmlElement &element, const ResponseHeaders *headers, GoogleString *content, GoogleString *mime_type, GoogleString *charset)

Additional Inherited Members
Public Types inherited from net_instaweb::HtmlFilter
enum	ScriptUsage { kWillInjectScripts, kMayInjectScripts, kNeverInjectsScripts }
	Describes a filter's relationship with scripts. More...
Static Public Attributes inherited from net_instaweb::CommonFilter
static const char	kCreateResourceFailedDebugMsg []
	Debug message to be inserted when resource creation fails.
Protected Member Functions inherited from net_instaweb::CommonFilter
ServerContext *	server_context () const
const RewriteOptions *	rewrite_options ()
virtual const char *	LoggingId ()

Detailed Description

Implements deferring of javascripts into post onload. JsDisableFilter moves scripts inside a noscript tag. This filter adds a javascript that goes through every noscript tag to defer them to be executed at onload of window.

Member Function Documentation

virtual void net_instaweb::JsDeferDisabledFilter::DetermineEnabled ( GoogleString *  disabled_reason )

virtual

Invoked by rewrite driver where all filters should determine whether they are enabled for this request. The re-writer my optionally set disabled_reason to explain why it disabled itself, which will appear in the debug output.

Reimplemented from net_instaweb::EmptyHtmlFilter.

ScriptUsage net_instaweb::JsDeferDisabledFilter::GetScriptUsage ( ) const

inlineoverridevirtual

Note: there is also kRequiresScriptExecutionFilterSet in rewrite_options.cc, which identifies filters that will leave broken pages if javascript is disabled, and hence require noscript handing. The set of filters that CanInjectScripts is larger, as it includes filters that might inject beacons or other optional functionality that is not page-critical.

Implements net_instaweb::HtmlFilter.

static bool net_instaweb::JsDeferDisabledFilter::ShouldApply ( RewriteDriver *  driver )

static

JsDeferDisableFilter will be no op for the request if ShouldApply returns false.

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The documentation for this class was generated from the following file:

• net/instaweb/rewriter/public/js_defer_disabled_filter.h