Classes
class	Transformer

Public Types
enum	InputPortion { kInputIncludesEnd, kInputDoesNotIncludeEnd }

Public Member Functions
	CssTagScanner (Transformer transformer, MessageHandler handler)

bool	TransformUrlsStreaming (StringPiece contents, InputPortion input_portion, Writer *writer)

GoogleString	RetainedForReparse () const

Static Public Member Functions
static bool	ParseCssElement (HtmlElement element, HtmlElement::Attribute href, const char media, StringPieceVector nonstandard_attributes)

static bool	ParseCssElement (HtmlElement element, HtmlElement::Attribute href, const char *media)

static bool	TransformUrls (StringPiece contents, Writer writer, Transformer transformer, MessageHandler *handler)

static bool	HasImport (const StringPiece &contents, MessageHandler *handler)

static bool	HasUrl (const StringPiece &contents)
	Detemines whether this CSS contains a URI value (aka URL).

static bool	IsStylesheetOrAlternate (const StringPiece &attribute_value)

static bool	IsAlternateStylesheet (const StringPiece &attribute_value)
	Does this rel attribute value represent an alternate stylesheet?

Static Public Attributes
static const char	kStylesheet []

static const char	kAlternate []

static const char	kUriValue []

Member Enumeration Documentation

enum net_instaweb::CssTagScanner::InputPortion

When parsing streaming input, we need to be told if the given input portion goes up to end-of-file (since it affects whether something may continue the last token of the input).

Constructor & Destructor Documentation

net_instaweb::CssTagScanner::CssTagScanner	(	Transformer *	transformer,
		MessageHandler *	handler
	)

An instance of CssTagScanner should be created to use TransformUrlsStreaming; other APIs do not need this. *transformer will be used to to transform URLs in CSS, and *handler for logging.

Member Function Documentation

static bool net_instaweb::CssTagScanner::HasImport	(	const StringPiece &	contents,
		MessageHandler *	handler
	)

static

Does this CSS file contain ? If so, it cannot be combined with previous CSS files. This may give false-positives, but no false-negatives.

static bool net_instaweb::CssTagScanner::IsStylesheetOrAlternate ( const StringPiece & attribute_value )

static

Does this attribute value represent a stylesheet or alternate stylesheet? Should be called with element->AttributeValue(HtmlName::kRel) as the arg.

static bool net_instaweb::CssTagScanner::ParseCssElement	(	HtmlElement *	element,
		HtmlElement::Attribute **	href,
		const char **	media,
		StringPieceVector *	nonstandard_attributes
	)

static

Examines an HTML element to determine if it's a CSS link, extracting out the href, the media type (if any) and any nonstandard attributes. If it's not CSS, href is set to NULL, media is set to "", and no nonstandard attributes are identified. NULL may be passed for nonstandard_attributes to indicate the caller doesn't need them collected.

static bool net_instaweb::CssTagScanner::ParseCssElement	(	HtmlElement *	element,
		HtmlElement::Attribute **	href,
		const char **	media
	)

inlinestatic

Many callers don't care about nonstandard attributes, so we provide a version that discards that information.

nonstandard attributes

GoogleString net_instaweb::CssTagScanner::RetainedForReparse ( ) const

inline

Returns what was retained by TransformUrlsStreaming for reparsing. Meant for use in tests.

static bool net_instaweb::CssTagScanner::TransformUrls	(	StringPiece	contents,
		Writer *	writer,
		Transformer *	transformer,
		MessageHandler *	handler
	)

static

Scans the contents of a CSS file, looking for the pattern url(xxx). Performs an arbitrary mutation on all such URLs. If xxx is quoted with single-quotes or double-quotes, those are retained and the URL inside is transformed.

bool net_instaweb::CssTagScanner::TransformUrlsStreaming	(	StringPiece	contents,
		InputPortion	input_portion,
		Writer *	writer
	)

Like above, but handles incomplete input. In such a case, all chunks other than the last one should be served with input_portion == kInputDoesNotIncludeEnd. Note that this method store some state for reparsing, so you can't concurrently run two streams through the same CssTagScanner object.

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

net/instaweb/rewriter/public/css_tag_scanner.h

Classes

Public Types

Public Member Functions

Static Public Member Functions

Static Public Attributes

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation