/**
* @param Content|null $def_content The default value to return
*
* @return Content|null Content on success, $def_content for invalid sections
*
* @since 1.21
*/
protected function getContentObject($def_content = null)
{
global $wgOut, $wgRequest, $wgUser, $wgContLang;
wfProfileIn(__METHOD__);
$content = false;
// For message page not locally set, use the i18n message.
// For other non-existent articles, use preload text if any.
if (!$this->mTitle->exists() || $this->section == 'new') {
if ($this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new') {
# If this is a system message, get the default text.
$msg = $this->mTitle->getDefaultMessageText();
$content = $this->toEditContent($msg);
}
if ($content === false) {
# If requested, preload some text.
$preload = $wgRequest->getVal('preload', $this->section === 'new' ? 'MediaWiki:addsection-preload' : '');
$params = $wgRequest->getArray('preloadparams', array());
$content = $this->getPreloadedContent($preload, $params);
}
// For existing pages, get text based on "undo" or section parameters.
} else {
if ($this->section != '') {
// Get section edit text (returns $def_text for invalid sections)
$orig = $this->getOriginalContent($wgUser);
$content = $orig ? $orig->getSection($this->section) : null;
if (!$content) {
$content = $def_content;
}
} else {
$undoafter = $wgRequest->getInt('undoafter');
$undo = $wgRequest->getInt('undo');
if ($undo > 0 && $undoafter > 0) {
$undorev = Revision::newFromId($undo);
$oldrev = Revision::newFromId($undoafter);
# Sanity check, make sure it's the right page,
# the revisions exist and they were not deleted.
# Otherwise, $content will be left as-is.
if (!is_null($undorev) && !is_null($oldrev) && !$undorev->isDeleted(Revision::DELETED_TEXT) && !$oldrev->isDeleted(Revision::DELETED_TEXT)) {
$content = $this->mArticle->getUndoContent($undorev, $oldrev);
if ($content === false) {
# Warn the user that something went wrong
$undoMsg = 'failure';
} else {
$oldContent = $this->mArticle->getPage()->getContent(Revision::RAW);
$popts = ParserOptions::newFromUserAndLang($wgUser, $wgContLang);
$newContent = $content->preSaveTransform($this->mTitle, $wgUser, $popts);
if ($newContent->equals($oldContent)) {
# Tell the user that the undo results in no change,
# i.e. the revisions were already undone.
$undoMsg = 'nochange';
$content = false;
} else {
# Inform the user of our success and set an automatic edit summary
$undoMsg = 'success';
# If we just undid one rev, use an autosummary
$firstrev = $oldrev->getNext();
if ($firstrev && $firstrev->getId() == $undo) {
$userText = $undorev->getUserText();
if ($userText === '') {
$undoSummary = wfMessage('undo-summary-username-hidden', $undo)->inContentLanguage()->text();
} else {
$undoSummary = wfMessage('undo-summary', $undo, $userText)->inContentLanguage()->text();
}
if ($this->summary === '') {
$this->summary = $undoSummary;
} else {
$this->summary = $undoSummary . wfMessage('colon-separator')->inContentLanguage()->text() . $this->summary;
}
$this->undidRev = $undo;
}
$this->formtype = 'diff';
}
}
} else {
// Failed basic sanity checks.
// Older revisions may have been removed since the link
// was created, or we may simply have got bogus input.
$undoMsg = 'norev';
}
// Messages: undo-success, undo-failure, undo-norev, undo-nochange
$class = ($undoMsg == 'success' ? '' : 'error ') . "mw-undo-{$undoMsg}";
$this->editFormPageTop .= $wgOut->parse("<div class=\"{$class}\">" . wfMessage('undo-' . $undoMsg)->plain() . '</div>', true, true);
}
if ($content === false) {
$content = $this->getOriginalContent($wgUser);
}
}
}
wfProfileOut(__METHOD__);
return $content;
}
