abstract method itemFN()

check media id validity

fix variable declaration

rename variables

remove Ui\Diff::buildDiffHead()

refactor Diff with extendedRevisionInfo()

obsolete buildDiffHead()

define Ui\Revisions::getRevisions()

- new item property defined
- modified getObjRevInfo(), buildDiffHead()

allow instance when id is not identical with $INFO['id']

refactor buildDiffHead()

allow id is not identical with $INFO['id']

minor edits

use properties in showDiffViewSelector()

remove getDiffType()

new method setChangeLog()

change methods name

identify current rev in html form

use PageDiff::compareWith() for draft, conflict

define preProcess() method

fix checkbox value for current page

similarify MediaDiff and PageDiff classes

move media_diff() into Ui\MediaDiff class

deprecated functions:
media_diff()
_media_file_diff()
media_file_diff()
media_image_diff()

Ui\Diff hierarchy

Ui\Diff hierarchy

move Ui\Diff to Ui\PageDiff

UI\Revisions hierachy

define Revisions as abstract, which is inherited by PageRevision and MediaRevision classes. this is simillar to ChangeLog class hierachy.