Base interface for content objects. More...

Inheritance diagram for Content:

Public Member Functions
	addSectionHeader ($header)
	Returns a new WikitextContent object with the given section heading prepended, if supported.
	convert ($toModel, $lossy= '')
	Converts this content object into another content object with the given content model, if that is possible.
	copy ()
	Return a copy of this Content object.
	equals (Content $that=null)
	Returns true if this Content objects is conceptually equivalent to the given Content object.
	getContentHandler ()
	Convenience method that returns the ContentHandler singleton for handling the content model that this Content object uses.
	getDefaultFormat ()
	Convenience method that returns the default serialization format for the content model that this Content object uses.
	getDeletionUpdates (WikiPage $page, ParserOutput $parserOutput=null)
	Returns a list of updates to perform when this content is deleted.
	getModel ()
	Returns the ID of the content model used by this Content object.
	getNativeData ()
	Returns native representation of the data.
	getParserOutput (Title $title, $revId=null, ParserOptions $options=null, $generateHtml=true)
	Parse the Content object and generate a ParserOutput from the result.
	getRedirectChain ()
	Construct the redirect destination from this content and return an array of Titles, or null if this content doesn't represent a redirect.
	getRedirectTarget ()
	Construct the redirect destination from this content and return a Title, or null if this content doesn't represent a redirect.
	getSecondaryDataUpdates (Title $title, Content $old=null, $recursive=true, ParserOutput $parserOutput=null)
	Returns a list of DataUpdate objects for recording information about this Content in some secondary data store.
	getSection ($sectionId)
	Returns the section with the given ID.
	getSize ()
	Returns the content's nominal size in bogo-bytes.
	getSupportedFormats ()
	Convenience method that returns the list of serialization formats supported for the content model that this Content object uses.
	getTextForSearchIndex ()
	getTextForSummary ($maxLength=250)
	Returns a textual representation of the content suitable for use in edit summaries and log messages.
	getUltimateRedirectTarget ()
	Construct the redirect destination from this content and return the Title, or null if this content doesn't represent a redirect.
	getWikitextForTransclusion ()
	isCountable ($hasLinks=null)
	Returns true if this content is countable as a "real" wiki page, provided that it's also in a countable location (e.g.
	isEmpty ()
	Returns true if this Content object represents empty content.
	isRedirect ()
	Returns whether this Content represents a redirect.
	isSupportedFormat ($format)
	Returns true if $format is a supported serialization format for this Content object, false if it isn't.
	isValid ()
	Returns whether the content is valid.
	matchMagicWord (MagicWord $word)
	Returns true if this Content object matches the given magic word.
	preloadTransform (Title $title, ParserOptions $parserOptions)
	Returns a Content object with preload transformations applied (or this object if no transformations apply).
	prepareSave (WikiPage $page, $flags, $baseRevId, User $user)
	Prepare Content for saving.
	preSaveTransform (Title $title, User $user, ParserOptions $parserOptions)
	Returns a Content object with pre-save transformations applied (or this object if no transformations apply).
	replaceSection ($section, Content $with, $sectionTitle= '')
	Replaces a section of the content and returns a Content object with the section replaced.
	serialize ($format=null)
	Convenience method for serializing this Content object.
	updateRedirect (Title $target)
	If this Content object is a redirect, this method updates the redirect target.

Detailed Description

Base interface for content objects.

Definition at line 34 of file Content.php.

Member Function Documentation

Content::addSectionHeader ( $ header )

Returns a new WikitextContent object with the given section heading prepended, if supported.

The default implementation just returns this Content object unmodified, ignoring the section header.

Since:: 1.21

Parameters:

$header string

Returns:: Content

Implemented in AbstractContent, and WikitextContent.

Content::convert	(	$	toModel,
		$	lossy = `''`
	)

Converts this content object into another content object with the given content model, if that is possible.

Parameters:

string	$toModel	the desired content model, use the CONTENT_MODEL_XXX flags.
string	$lossy	flag, set to "lossy" to allow lossy conversion. If lossy conversion is not allowed, full round-trip conversion is expected to work without losing information.

Returns:: Content|bool A content object with the content model $toModel, or false if that conversion is not supported.

Implemented in AbstractContent, and TextContent.

Content::copy ( )

Return a copy of this Content object.

The following must be true for the object returned:

if $copy = $original->copy()

get_class($original) === get_class($copy)
$original->getModel() === $copy->getModel()
$original->equals( $copy )

If and only if the Content object is immutable, the copy() method can and should return $this. That is, $copy === $original may be true, but only for immutable content objects.

Since:: 1.21

Returns:: Content. A copy of this object

Implemented in RevisionTestModifyableContent, DummyContentForTesting, MessageContent, and TextContent.

Content::equals ( Content $ that = null )

Returns true if this Content objects is conceptually equivalent to the given Content object.

Contract:

Will return false if $that is null.
Will return true if $that === $this.
Will return false if $that->getModel() != $this->getModel().
Will return false if $that->getNativeData() is not equal to $this->getNativeData(), where the meaning of "equal" depends on the actual data model.

Implementations should be careful to make equals() transitive and reflexive:

$a->equals( $b ) <=> $b->equals( $a )
$a->equals( $b ) && $b->equals( $c ) ==> $a->equals( $c )

Since:: 1.21

Parameters:

$that Content The Content object to compare to

Returns:: bool True if this Content object is equal to $that, false otherwise.

Implemented in AbstractContent.

Referenced by CssContentTest\testEquals(), and TextContentTest\testEquals().

Content::getContentHandler ( )

Convenience method that returns the ContentHandler singleton for handling the content model that this Content object uses.

Shorthand for ContentHandler::getForContent( $this )

Since:: 1.21

Returns:: ContentHandler

Implemented in AbstractContent.

Content::getDefaultFormat ( )

Convenience method that returns the default serialization format for the content model that this Content object uses.

Shorthand for $this->getContentHandler()->getDefaultFormat()

Since:: 1.21

Returns:: String

Implemented in AbstractContent.

Content::getDeletionUpdates	(	WikiPage $	page,
		ParserOutput $	parserOutput = `null`
	)

Returns a list of updates to perform when this content is deleted.

The necessary updates may be taken from the Content object, or depend on the current state of the database.

Since:: 1.21

Parameters:

$page	WikiPage the deleted page
$parserOutput	null\|ParserOutput optional parser output object for efficient access to meta-information about the content object. Provide if you have one handy.

Returns:: array A list of DataUpdate instances that will clean up the database after deletion.

Implemented in AbstractContent.

Referenced by WikiPage\getDeletionUpdates().

Content::getModel ( )

Returns the ID of the content model used by this Content object.

Corresponds to the CONTENT_MODEL_XXX constants.

Since:: 1.21

Returns:: String The model id

Implemented in AbstractContent.

Referenced by TextContent\diff(), ContentHandler\getForContent(), TextContentHandler\merge3(), and WikitextContent\replaceSection().

Content::getNativeData ( )

Returns native representation of the data.

Interpretation depends on the data model used, as given by getDataModel().

Since:: 1.21

Returns:: mixed The native representation of the content. Could be a string, a nested array structure, an object, a binary blob... anything, really.

Note:: Caller must be aware of content model!

Implemented in DummyContentForTesting, TextContent, and MessageContent.

Referenced by LinkFilter\matchEntry(), WikitextContent\replaceSection(), and TextContentHandler\serializeContent().

Content::getParserOutput	(	Title $	title,
		$	revId = `null`,
		ParserOptions $	options = `null`,
		$	generateHtml = `true`
	)

Parse the Content object and generate a ParserOutput from the result.

$result->getText() can be used to obtain the generated HTML. If no HTML is needed, $generateHtml can be set to false; in that case, $result->getText() may return null.

Parameters:

$title	Title The page title to use as a context for rendering
$revId	null\|int The revision being rendered (optional)
$options	null\|ParserOptions Any parser options
$generateHtml	Boolean Whether to generate HTML (default: true). If false, the result of calling getText() on the ParserOutput object returned by this method is undefined.

Since:: 1.21

Returns:: ParserOutput

Implemented in DummyContentForTesting, WikitextContent, TextContent, and MessageContent.

Content::getRedirectChain ( )

Construct the redirect destination from this content and return an array of Titles, or null if this content doesn't represent a redirect.

The last element in the array is the final destination after all redirects have been resolved (up to $wgMaxRedirects times).

Since:: 1.21

Returns:: Array of Titles, with the destination last

Implemented in AbstractContent.

Content::getRedirectTarget ( )

Construct the redirect destination from this content and return a Title, or null if this content doesn't represent a redirect.

This will only return the immediate redirect target, useful for the redirect table and other checks that don't need full recursion.

Since:: 1.21

Returns:: Title: The corresponding Title

Implemented in AbstractContent, and WikitextContent.

Content::getSecondaryDataUpdates	(	Title $	title,
		Content $	old = `null`,
		$	recursive = `true`,
		ParserOutput $	parserOutput = `null`
	)

Returns a list of DataUpdate objects for recording information about this Content in some secondary data store.

If the optional second argument, $old, is given, the updates may model only the changes that need to be made to replace information about the old content with information about the new content.

This default implementation calls $this->getParserOutput( $content, $title, null, null, false ), and then calls getSecondaryDataUpdates( $title, $recursive ) on the resulting ParserOutput object.

Subclasses may implement this to determine the necessary updates more efficiently, or make use of information about the old content.

Parameters:

$title	Title The context for determining the necessary updates
$old	Content\|null An optional Content object representing the previous content, i.e. the content being replaced by this Content object.
$recursive	boolean Whether to include recursive updates (default: false).
$parserOutput	ParserOutput\|null Optional ParserOutput object. Provide if you have one handy, to avoid re-parsing of the content.

Returns:: Array. A list of DataUpdate objects for putting information about this content object somewhere.

Since:: 1.21

Implemented in AbstractContent.

Content::getSection ( $ sectionId )

Returns the section with the given ID.

Since:: 1.21

Parameters:

string $sectionId The section's ID, given as a numeric string. The ID "0" retrieves the section before the first heading, "1" the text between the first heading (included) and the second heading (excluded), etc.

Returns:: Content|Boolean|null The section, or false if no such section exist, or null if sections are not supported.

Implemented in AbstractContent, and WikitextContent.

Content::getSize ( )

Returns the content's nominal size in bogo-bytes.

Returns:: int

Implemented in DummyContentForTesting, MessageContent, and TextContent.

Content::getSupportedFormats ( )

Convenience method that returns the list of serialization formats supported for the content model that this Content object uses.

Shorthand for $this->getContentHandler()->getSupportedFormats()

Since:: 1.21

Returns:: Array of supported serialization formats

Implemented in AbstractContent.

Content::getTextForSearchIndex ( )

Since:: 1.21

Returns:: string A string representing the content in a way useful for building a full text search index. If no useful representation exists, this method returns an empty string.

Todo:

Test that this actually works

Make sure this also works with LuceneSearch / WikiSearch

Implemented in DummyContentForTesting, TextContent, and MessageContent.

Content::getTextForSummary ( $ maxLength = 250 )

Returns a textual representation of the content suitable for use in edit summaries and log messages.

Since:: 1.21

Parameters:

int $maxLength Maximum length of the summary text

Returns:: string The summary text

Implemented in DummyContentForTesting, WikitextContent, MessageContent, and TextContent.

Content::getUltimateRedirectTarget ( )

Construct the redirect destination from this content and return the Title, or null if this content doesn't represent a redirect.

This will recurse down $wgMaxRedirects times or until a non-redirect target is hit in order to provide (hopefully) the Title of the final destination instead of another redirect.

There is usually no need to override the default behavior, subclasses that want to implement redirects should override getRedirectTarget().

Since:: 1.21

Returns:: Title

Implemented in AbstractContent.

Content::getWikitextForTransclusion ( )

Since:: 1.21

Returns:: string|false The wikitext to include when another page includes this content, or false if the content is not includable in a wikitext page.

Todo:

Allow native handling, bypassing wikitext representation, like for includable special pages.

Allow transclusion into other content models than Wikitext!

Used in WikiPage and MessageCache to get message text. Not so nice. What should we use instead?!

Implemented in DummyContentForTesting, TextContent, and MessageContent.

Content::isCountable ( $ hasLinks = null )

Returns true if this content is countable as a "real" wiki page, provided that it's also in a countable location (e.g.

a current revision in the main namespace).

Since:: 1.21

Parameters:

bool $hasLinks If it is known whether this content contains links, provide this information here, to avoid redundant parsing to find out.

Returns:: boolean

Implemented in DummyContentForTesting, MessageContent, and TextContent.

Content::isEmpty ( )

Returns true if this Content object represents empty content.

Since:: 1.21

Returns:: bool Whether this Content object is empty

Implemented in AbstractContent.

Content::isRedirect ( )

Returns whether this Content represents a redirect.

Shorthand for getRedirectTarget() !== null.

Since:: 1.21

Returns:: bool

Implemented in AbstractContent.

Content::isSupportedFormat ( $ format )

Returns true if $format is a supported serialization format for this Content object, false if it isn't.

Note that this should always return true if $format is null, because null stands for the default serialization.

Shorthand for $this->getContentHandler()->isSupportedFormat( $format )

Since:: 1.21

Parameters:

string $format The format to check

Returns:: bool Whether the format is supported

Implemented in AbstractContent.

Content::isValid ( )

Returns whether the content is valid.

This is intended for local validity checks, not considering global consistency.

Content needs to be valid before it can be saved.

This default implementation always returns true.

Since:: 1.21

Returns:: boolean

Implemented in AbstractContent.

Content::matchMagicWord ( MagicWord $ word )

Returns true if this Content object matches the given magic word.

Since:: 1.21

Parameters:

MagicWord $word the magic word to match

Returns:: bool whether this Content object matches the given magic word.

Implemented in AbstractContent, and WikitextContent.

Content::preloadTransform	(	Title $	title,
		ParserOptions $	parserOptions
	)

Returns a Content object with preload transformations applied (or this object if no transformations apply).

Since:: 1.21

Parameters:

$title	Title
$parserOptions	null\|ParserOptions

Returns:: Content

Implemented in AbstractContent, and WikitextContent.

Content::prepareSave	(	WikiPage $	page,
		$	flags,
		$	baseRevId,
		User $	user
	)

Prepare Content for saving.

Called before Content is saved by WikiPage::doEditContent() and in similar places.

This may be used to check the content's consistency with global state. This function should NOT write any information to the database.

Note that this method will usually be called inside the same transaction bracket that will be used to save the new revision.

Note that this method is called before any update to the page table is performed. This means that $page may not yet know a page ID.

Since:: 1.21

Parameters:

WikiPage	$page	The page to be saved.
int	$flags	bitfield for use with EDIT_XXX constants, see WikiPage::doEditContent()
int	$baseRevId	the ID of the current revision
User	$user

Returns:: Status A status object indicating whether the content was successfully prepared for saving. If the returned status indicates an error, a rollback will be performed and the transaction aborted.

See also:: see WikiPage::doEditContent()

Implemented in AbstractContent.

Content::preSaveTransform	(	Title $	title,
		User $	user,
		ParserOptions $	parserOptions
	)

Returns a Content object with pre-save transformations applied (or this object if no transformations apply).

Since:: 1.21

Parameters:

$title	Title
$user	User
$parserOptions	null\|ParserOptions

Returns:: Content

Implemented in AbstractContent, TextContent, WikitextContent, CssContent, and JavaScriptContent.

Content::replaceSection	(	$	section,
		Content $	with,
		$	sectionTitle = `''`
	)

Replaces a section of the content and returns a Content object with the section replaced.

Since:: 1.21

Parameters:

	$section	null/false or a section number (0, 1, 2, T1, T2...), or "new"
	$with	Content: new content of the section
string	$sectionTitle	new section's subject, only if $section is 'new'