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<?php
/**
* Content object implementation for representing flat text.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @since 1.21
*
* @file
* @ingroup Content
*
* @author Daniel Kinzler
*/
/**
* Content object implementation for representing flat text.
*
* TextContent instances are immutable
*
* @ingroup Content
*/
class TextContent extends AbstractContent {
/**
* @param string $text
* @param string $model_id
* @throws MWException
*/
public function __construct( $text, $model_id = CONTENT_MODEL_TEXT ) {
parent::__construct( $model_id );
if ( $text === null || $text === false ) {
wfWarn( "TextContent constructed with \$text = " . var_export( $text, true ) . "! "
. "This may indicate an error in the caller's scope.", 2 );
$text = '';
}
if ( !is_string( $text ) ) {
throw new MWException( "TextContent expects a string in the constructor." );
}
$this->mText = $text;
}
/**
* @note Mutable subclasses MUST override this to return a copy!
*
* @return Content $this
*/
public function copy() {
return $this; # NOTE: this is ok since TextContent are immutable.
}
public function getTextForSummary( $maxlength = 250 ) {
global $wgContLang;
$text = $this->getNativeData();
$truncatedtext = $wgContLang->truncate(
preg_replace( "/[\n\r]/", ' ', $text ),
max( 0, $maxlength ) );
return $truncatedtext;
}
/**
* Returns the text's size in bytes.
*
* @return int
*/
public function getSize() {
$text = $this->getNativeData();
return strlen( $text );
}
/**
* Returns true if this content is not a redirect, and $wgArticleCountMethod
* is "any".
*
* @param bool|null $hasLinks If it is known whether this content contains links,
* provide this information here, to avoid redundant parsing to find out.
*
* @return bool
*/
public function isCountable( $hasLinks = null ) {
global $wgArticleCountMethod;
if ( $this->isRedirect() ) {
return false;
}
if ( $wgArticleCountMethod === 'any' ) {
return true;
}
return false;
}
/**
* Returns the text represented by this Content object, as a string.
*
* @return string The raw text.
*/
public function getNativeData() {
return $this->mText;
}
/**
* Returns the text represented by this Content object, as a string.
*
* @return string The raw text.
*/
public function getTextForSearchIndex() {
return $this->getNativeData();
}
/**
* Returns attempts to convert this content object to wikitext,
* and then returns the text string. The conversion may be lossy.
*
* @note this allows any text-based content to be transcluded as if it was wikitext.
*
* @return string|bool The raw text, or false if the conversion failed.
*/
public function getWikitextForTransclusion() {
$wikitext = $this->convert( CONTENT_MODEL_WIKITEXT, 'lossy' );
if ( $wikitext ) {
return $wikitext->getNativeData();
} else {
return false;
}
}
/**
* Returns a Content object with pre-save transformations applied.
* This implementation just trims trailing whitespace.
*
* @param Title $title
* @param User $user
* @param ParserOptions $popts
*
* @return Content
*/
public function preSaveTransform( Title $title, User $user, ParserOptions $popts ) {
$text = $this->getNativeData();
$pst = rtrim( $text );
return ( $text === $pst ) ? $this : new static( $pst, $this->getModel() );
}
/**
* Diff this content object with another content object.
*
* @since 1.21
*
* @param Content $that The other content object to compare this content object to.
* @param Language $lang The language object to use for text segmentation.
* If not given, $wgContentLang is used.
*
* @return Diff A diff representing the changes that would have to be
* made to this content object to make it equal to $that.
*/
public function diff( Content $that, Language $lang = null ) {
global $wgContLang;
$this->checkModelID( $that->getModel() );
// @todo could implement this in DifferenceEngine and just delegate here?
if ( !$lang ) {
$lang = $wgContLang;
}
$otext = $this->getNativeData();
$ntext = $that->getNativeData();
# Note: Use native PHP diff, external engines don't give us abstract output
$ota = explode( "\n", $lang->segmentForDiff( $otext ) );
$nta = explode( "\n", $lang->segmentForDiff( $ntext ) );
$diff = new Diff( $ota, $nta );
return $diff;
}
/**
* Fills the provided ParserOutput object with information derived from the content.
* Unless $generateHtml was false, this includes an HTML representation of the content
* provided by getHtml().
*
* For content models listed in $wgTextModelsToParse, this method will call the MediaWiki
* wikitext parser on the text to extract any (wikitext) links, magic words, etc.
*
* Subclasses may override this to provide custom content processing.
* For custom HTML generation alone, it is sufficient to override getHtml().
*
* @param Title $title Context title for parsing
* @param int $revId Revision ID (for {{REVISIONID}})
* @param ParserOptions $options Parser options
* @param bool $generateHtml Whether or not to generate HTML
* @param ParserOutput $output The output object to fill (reference).
*/
protected function fillParserOutput( Title $title, $revId,
ParserOptions $options, $generateHtml, ParserOutput &$output
) {
global $wgParser, $wgTextModelsToParse;
if ( in_array( $this->getModel(), $wgTextModelsToParse ) ) {
// parse just to get links etc into the database, HTML is replaced below.
$output = $wgParser->parse( $this->getNativeData(), $title, $options, true, true, $revId );
}
if ( $generateHtml ) {
$html = $this->getHtml();
} else {
$html = '';
}
$output->setText( $html );
}
/**
* Generates an HTML version of the content, for display. Used by
* fillParserOutput() to provide HTML for the ParserOutput object.
*
* Subclasses may override this to provide a custom HTML rendering.
* If further information is to be derived from the content (such as
* categories), the fillParserOutput() method can be overridden instead.
*
* For backwards-compatibility, this default implementation just calls
* getHighlightHtml().
*
* @return string An HTML representation of the content
*/
protected function getHtml() {
return $this->getHighlightHtml();
}
/**
* Generates an HTML version of the content, for display.
*
* This default implementation returns an HTML-escaped version
* of the raw text content.
*
* @note The functionality of this method should really be implemented
* in getHtml(), and subclasses should override getHtml() if needed.
* getHighlightHtml() is kept around for backward compatibility with
* extensions that already override it.
*
* @deprecated since 1.24. Use getHtml() instead. In particular, subclasses overriding
* getHighlightHtml() should override getHtml() instead.
*
* @return string An HTML representation of the content
*/
protected function getHighlightHtml() {
return htmlspecialchars( $this->getNativeData() );
}
/**
* This implementation provides lossless conversion between content models based
* on TextContent.
*
* @param string $toModel The desired content model, use the CONTENT_MODEL_XXX flags.
* @param 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.
*
* @return Content|bool A content object with the content model $toModel, or false if that
* conversion is not supported.
*
* @see Content::convert()
*/
public function convert( $toModel, $lossy = '' ) {
$converted = parent::convert( $toModel, $lossy );
if ( $converted !== false ) {
return $converted;
}
$toHandler = ContentHandler::getForModelID( $toModel );
if ( $toHandler instanceof TextContentHandler ) {
// NOTE: ignore content serialization format - it's just text anyway.
$text = $this->getNativeData();
$converted = $toHandler->unserializeContent( $text );
}
return $converted;
}
}