Page Speed Optimization Libraries  1.12.34.1
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net_instaweb::ImageCombineFilter Class Reference
Inheritance diagram for net_instaweb::ImageCombineFilter:
net_instaweb::RewriteFilter net_instaweb::CommonFilter net_instaweb::EmptyHtmlFilter net_instaweb::HtmlFilter

Public Member Functions

 ImageCombineFilter (RewriteDriver *rewrite_driver)
 
bool AddCssBackgroundContext (const GoogleUrl &original_url, const GoogleUrl &base_url, Css::Values *values, int value_index, CssFilter::Context *parent, Css::Declarations *decls, bool *is_authorized, MessageHandler *handler)
 
OutputResourcePtr MakeOutput ()
 Create the combination with the current combiner.
 
void Reset (RewriteContext *context, const GoogleUrl &css_url, const StringPiece &css_text)
 Creates a new context for doing spriting, but does not register it.
 
void RegisterOrReleaseContext ()
 
- Public Member Functions inherited from net_instaweb::RewriteFilter
 RewriteFilter (RewriteDriver *driver)
 
virtual void DetermineEnabled (GoogleString *disabled_reason)
 
virtual bool CanModifyUrls ()
 
virtual bool ComputeOnTheFly () const
 
virtual RewriteContextMakeNestedRewriteContext (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 GoogleUrlbase_url () const
 Getters. More...
 
const GoogleUrldecoded_base_url () const
 
RewriteDriverdriver () const
 
HtmlElementnoscript_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, bool *is_authorized)
 
ResourcePtr CreateInputResourceOrInsertDebugComment (StringPiece input_url, HtmlElement *element)
 
void ResolveUrl (StringPiece input_url, GoogleUrl *out_url)
 
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 EndDocument ()
 
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 ()
 
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)
 

Protected Member Functions

virtual const UrlSegmentEncoderencoder () const
 
virtual const char * Name () const
 The name of this filter – used for logging and debugging.
 
virtual void StartDocumentImpl ()
 
virtual void StartElementImpl (HtmlElement *element)
 
virtual void EndElementImpl (HtmlElement *element)
 
virtual const char * id () const
 Image rewriting was originally, but is no longer, a single CSS.
 
- 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
ServerContextserver_context () const
 
const RewriteOptionsrewrite_options ()
 

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.
 

Member Function Documentation

bool net_instaweb::ImageCombineFilter::AddCssBackgroundContext ( const GoogleUrl original_url,
const GoogleUrl base_url,
Css::Values *  values,
int  value_index,
CssFilter::Context parent,
Css::Declarations *  decls,
bool *  is_authorized,
MessageHandler handler 
)

Attempt to add the CSS background image with (resolved) url original_url to this partnership. We do not take ownership of declarations; it must live until you call Realize() or Reset(). declarations is where we will add the new width and height values; url_value must point to the URL value to be replaced. Will not actually change anything until you call Realize(). This will succeed even in cases when it turns out (later) the image can not be sprited. Fails and returns false if:

  • We cannot get the declaration dimensions from 'decls'.
  • original_url is not on an authorized domain.
  • There is already a slot for original_url.
virtual const UrlSegmentEncoder* net_instaweb::ImageCombineFilter::encoder ( ) const
inlineprotectedvirtual

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.

void net_instaweb::ImageCombineFilter::RegisterOrReleaseContext ( )

If there is any work to do, registers the RewriteContext created by Reset(). If there isn't, cleans it up.

virtual void net_instaweb::ImageCombineFilter::StartDocumentImpl ( )
inlineprotectedvirtual

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.


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