net_instaweb::CssCombineFilter Class Reference

Inheritance diagram for net_instaweb::CssCombineFilter:

Public Member Functions
	CssCombineFilter (RewriteDriver *rewrite_driver)
virtual void	StartDocumentImpl ()
virtual void	EndDocument ()
virtual void	StartElementImpl (HtmlElement *element)
virtual void	EndElementImpl (HtmlElement *element)
virtual void	Flush ()
virtual void	DetermineEnabled (GoogleString *disabled_reason)
virtual void	IEDirective (HtmlIEDirectiveNode *directive)
virtual const char *	Name () const
	The name of this filter – used for logging and debugging.
virtual const UrlSegmentEncoder *	encoder () const
virtual RewriteContext *	MakeRewriteContext ()
virtual const char *	id () const
Public Member Functions inherited from net_instaweb::RewriteFilter
	RewriteFilter (RewriteDriver *driver)
virtual bool	CanModifyUrls ()
virtual bool	ComputeOnTheFly () const
virtual RewriteContext *	MakeNestedRewriteContext (RewriteContext *parent, const ResourceSlotPtr &slot)
virtual void	EncodeUserAgentIntoResourceContext (ResourceContext *context) const
virtual const RewriteOptions::Filter *	RelatedFilters (int *num_filters) const
virtual const StringPieceVector *	RelatedOptions () const
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	Directive (HtmlDirectiveNode *directive)
	Called for HTML directives (e.g. <!doctype foobar>).
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 Public Member Functions inherited from net_instaweb::RewriteFilter
static StringPiece	GetCharsetForScript (const Resource *script, const StringPiece attribute_charset, const StringPiece enclosing_charset)
static GoogleString	GetCharsetForStylesheet (const Resource *stylesheet, const StringPiece attribute_charset, const StringPiece enclosing_charset)
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)

Static Public Attributes
static const char	kCssCombineOpportunities []
static const char	kCssFileCountReduction []
	CSS file reduction (Optimally this equals kCssCombineOpportunities).
Static Public Attributes inherited from net_instaweb::CommonFilter
static const char	kCreateResourceFailedDebugMsg []
	Debug message to be inserted when resource creation fails.

Additional Inherited Members
Public Types inherited from net_instaweb::HtmlFilter
enum	ScriptUsage { kWillInjectScripts, kMayInjectScripts, kNeverInjectsScripts }
	Describes a filter's relationship with scripts. More...
Protected Member Functions inherited from net_instaweb::RewriteFilter
virtual const char *	LoggingId ()
	This class logs using id().
Protected Member Functions inherited from net_instaweb::CommonFilter
ServerContext *	server_context () const
const RewriteOptions *	rewrite_options ()

Member Function Documentation

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

virtual

Override DetermineEnabled so that filters that use the DOM cohort of the property cache can enable writing of it in the RewriterDriver. Filters inheriting from RewriteDriver that use the DOM cohort should override UsePropertyCacheDomCohort to return true.

Reimplemented from net_instaweb::RewriteFilter.

virtual const UrlSegmentEncoder* net_instaweb::CssCombineFilter::encoder ( ) const

inlinevirtual

All RewriteFilters define how they encode URLs and other associated information needed for a rewrite into a URL. The default implementation handles a single URL with no extra data. The filter owns the encoder.

Reimplemented from net_instaweb::RewriteFilter.

virtual void net_instaweb::CssCombineFilter::EndDocument ( )

virtual

Note: EndDocument will be called immediately before the last Flush call. (which also means that in the RewriteDriver use it is called before rendering for the last flush window).

Reimplemented from net_instaweb::EmptyHtmlFilter.

virtual void net_instaweb::CssCombineFilter::Flush ( )

virtual

Notifies the Filter that a flush is occurring. A filter that's generating streamed output should flush at this time. A filter that's mutating elements can mutate any element seen since the most recent flush; once an element is flushed it is already on the wire to its destination and it's too late to mutate. Flush is initiated by an application calling HttpParse::Flush().

Flush() is called after all other handlers during a HttpParse::Flush(), except RenderDone(), which (if in use) happens after Flush().

Reimplemented from net_instaweb::EmptyHtmlFilter.

virtual void net_instaweb::CssCombineFilter::IEDirective ( HtmlIEDirectiveNode *  directive )

virtual

Called for an IE directive; typically used for CSS styling. See http://msdn.microsoft.com/en-us/library/ms537512(VS.85).aspx

Todo:

TODO(mdsteele): Should we try to maintain the nested structure of the conditionals, in the same way that we maintain nesting of elements?

Reimplemented from net_instaweb::EmptyHtmlFilter.

virtual RewriteContext* net_instaweb::CssCombineFilter::MakeRewriteContext ( )

virtual

Generates a RewriteContext appropriate for this filter. Default implementation returns NULL. This must be overridden by filters. This is used to implement Fetch.

Reimplemented from net_instaweb::RewriteFilter.

virtual void net_instaweb::CssCombineFilter::StartDocumentImpl ( )

virtual

Overload these implementer methods: Intentionally left abstract so that implementers don't forget to change the name from Blah to BlahImpl.

Implements net_instaweb::CommonFilter.

Member Data Documentation

const char net_instaweb::CssCombineFilter::kCssCombineOpportunities[]

static

Statistic names:

of CSS links which could ideally have been reduced (# CSS links on

original page - 1 for each page).

---

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

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