D20948: [EPubGenerator] Avoid pointless scans of the whole document

[Stefan Brüns]

bruns created this revision.
bruns added a reviewer: Okular.
Herald added a project: Okular.
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REVISION SUMMARY
  The "<video></video>" tag is a placeholder, and should only be processed
  when it has been inserted for this toc item, i.e. when movieAnnots is
  non-empty. Also place the search cursor at the last inserted block,
  otherwise the expression will search from the beginning of the document.
  
  Do likewise for audio/soundActions.
  
  This makes loading large documents much fasters, and even fixes crashing
  on huge documents, e.g. from project Gutenberg "The Complete Works of
  William Shakespeare" (3200 pages) or the "King James Bible" (1400 pages).

TEST PLAN
  open a large EPub file (see above)

REPOSITORY
  R223 Okular

REVISION DETAIL
  https://phabricator.kde.org/D20948

AFFECTED FILES
  generators/epub/converter.cpp

To: bruns, #okular
Cc: okular-devel, joaonetto, tfella, ngraham, darcyshen, aacid
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