document.cpp.svn-base

okular

/* REFERENCE IMPLEMENTATION: better calling setViewport from other code
void KPDFDocument::setNextPage()
{
    // advance page and set viewport on observers
    if ( (*d->viewportIterator).pageNumber < (int)pages_vector.count() - 1 )
        setViewport( DocumentViewport( (*d->viewportIterator).pageNumber + 1 ) );
}

void KPDFDocument::setPrevPage()
{
    // go to previous page and set viewport on observers
    if ( (*d->viewportIterator).pageNumber > 0 )
        setViewport( DocumentViewport( (*d->viewportIterator).pageNumber - 1 ) );
}
*/
void KPDFDocument::setViewportPage( int page, int excludeId, bool smoothMove )
{
    // clamp page in range [0 ... numPages-1]
    if ( page < 0 )
        page = 0;
    else if ( page > (int)pages_vector.count() )
        page = pages_vector.count() - 1;

    // make a viewport from the page and broadcast it
    setViewport( DocumentViewport( page ), excludeId, smoothMove );
}

void KPDFDocument::setViewport( const DocumentViewport & viewport, int excludeId, bool smoothMove )
{
    // if already broadcasted, don't redo it
    DocumentViewport & oldViewport = *d->viewportIterator;
    // disabled by enrico on 2005-03-18 (less debug output)
    //if ( viewport == oldViewport )
    //    kDebug() << "setViewport with the same viewport." << endl;

    // set internal viewport taking care of history
    if ( oldViewport.pageNumber == viewport.pageNumber || oldViewport.pageNumber == -1 )
    {
        // if page is unchanged save the viewport at current position in queue
        oldViewport = viewport;
    }
    else
    {
        // remove elements after viewportIterator in queue
        d->viewportHistory.erase( ++d->viewportIterator, d->viewportHistory.end() );

        // keep the list to a reasonable size by removing head when needed
        if ( d->viewportHistory.count() >= 100 )
            d->viewportHistory.pop_front();

        // add the item at the end of the queue
        d->viewportIterator = d->viewportHistory.insert( d->viewportHistory.end(), viewport );
    }

    // notify change to all other (different from id) observers
    QMap< int, DocumentObserver * >::iterator it = d->observers.begin(), end = d->observers.end();
    for ( ; it != end ; ++ it )
        if ( it.key() != excludeId )
            (*it)->notifyViewportChanged( smoothMove );

    // [MEM] raise position of currently viewed page in allocation queue
    if ( d->allocatedPixmapsFifo.count() > 1 )
    {
        const int page = viewport.pageNumber;
        QLinkedList< AllocatedPixmap * > viewportPixmaps;
        QLinkedList< AllocatedPixmap * >::iterator aIt = d->allocatedPixmapsFifo.begin();
        QLinkedList< AllocatedPixmap * >::iterator aEnd = d->allocatedPixmapsFifo.end();
        while ( aIt != aEnd )
        {
            if ( (*aIt)->page == page )
            {
                viewportPixmaps.append( *aIt );
                aIt = d->allocatedPixmapsFifo.erase( aIt );
                continue;
            }
            ++aIt;
        }
        if ( !viewportPixmaps.isEmpty() )
            d->allocatedPixmapsFifo += viewportPixmaps;
    }
}

void KPDFDocument::setPrevViewport()
// restore viewport from the history
{
    if ( d->viewportIterator != d->viewportHistory.begin() )
    {
        // restore previous viewport and notify it to observers
        --d->viewportIterator;
        foreachObserver( notifyViewportChanged( true ) );
    }
}

void KPDFDocument::setNextViewport()
// restore next viewport from the history
{
    QLinkedList< DocumentViewport >::iterator nextIterator = d->viewportIterator;
    ++nextIterator;
    if ( nextIterator != d->viewportHistory.end() )
    {
        // restore next viewport and notify it to observers
        ++d->viewportIterator;
        foreachObserver( notifyViewportChanged( true ) );
    }
}


bool KPDFDocument::searchText( int searchID, const QString & text, bool fromStart, bool caseSensitive,
                               SearchType type, bool moveViewport, const QColor & color, bool noDialogs )
{
    // safety checks: don't perform searches on empty or unsearchable docs
    if ( !generator || !generator->supportsSearching() || pages_vector.isEmpty() )
        return false;

    // if searchID search not recorded, create new descriptor and init params
    if ( !d->searches.contains( searchID ) )
    {
        RunningSearch * search = new RunningSearch();
        search->continueOnPage = -1;
        d->searches[ searchID ] = search;
    }
    if (d->m_lastSearchID != searchID)
    {
        resetSearch(d->m_lastSearchID);
    }
    d->m_lastSearchID = searchID;
    RunningSearch * s = d->searches[ searchID ];

    // update search stucture
    bool newText = text != s->cachedString;
    s->cachedString = text;
    s->cachedType = type;
    s->cachedCaseSensitive = caseSensitive;
    s->cachedViewportMove = moveViewport;
    s->cachedNoDialogs = noDialogs;
    s->cachedColor = color;

    // global data for search
    bool foundAMatch = false;
    QLinkedList< int > pagesToNotify;

    // remove highlights from pages and queue them for notifying changes
    pagesToNotify += s->highlightedPages;
    QLinkedList< int >::iterator it = s->highlightedPages.begin(), end = s->highlightedPages.end();
    for ( ; it != end; ++it )
        pages_vector[ *it ]->deleteHighlights( searchID );
    s->highlightedPages.clear();

    // set hourglass cursor
    QApplication::setOverrideCursor( Qt::WaitCursor );

    // 1. ALLDOC - proces all document marking pages
    if ( type == AllDoc )
    {
        // search and highlight 'text' (as a solid phrase) on all pages
        QVector< KPDFPage * >::iterator it = pages_vector.begin(), end = pages_vector.end();
        for ( ; it != end; ++it )
        {
            // get page (from the first to the last)
            KPDFPage * page = *it;
            int pageNumber = page->number();

            // request search page if needed
            if ( !page->hasSearchPage() )
                requestTextPage( pageNumber );

            // loop on a page adding highlights for all found items
            bool addedHighlights = false;
            RegularAreaRect * lastMatch = 0;
            while ( 1 )
            {
                if ( lastMatch )
                    lastMatch = page->findText( searchID, text, NextRes, caseSensitive, lastMatch );
                else
                    lastMatch = page->findText( searchID, text, FromTop, caseSensitive );

                if ( !lastMatch )
                    break;

                // add highligh rect to the page
                page->setHighlight( searchID, lastMatch, color );
                addedHighlights = true;
            }

            // if added highlights, udpate internals and queue page for notify
            if ( addedHighlights )
            {
                foundAMatch = true;
                s->highlightedPages.append( pageNumber );
                if ( !pagesToNotify.contains( pageNumber ) )
                    pagesToNotify.append( pageNumber );
            }
        }

        // reset cursor to previous shape
        QApplication::restoreOverrideCursor();

        // send page lists if found anything new
	//if ( foundAMatch ) ?maybe?
        foreachObserver( notifySetup( pages_vector, false ) );
    }
    // 2. NEXTMATCH - find next matching item (or start from top)
    else if ( type == NextMatch )
    {
        // find out from where to start/resume search from
        int viewportPage = (*d->viewportIterator).pageNumber;
        int currentPage = fromStart ? 0 : ((s->continueOnPage != -1) ? s->continueOnPage : viewportPage);
        KPDFPage * lastPage = fromStart ? 0 : pages_vector[ currentPage ];

        // continue checking last SearchPage first (if it is the current page)
        RegularAreaRect * match = 0;
        if ( lastPage && lastPage->number() == s->continueOnPage )
        {
            if ( newText )
                match = lastPage->findText( searchID, text, FromTop, caseSensitive );
            else
                match = lastPage->findText( searchID, text, NextRes, caseSensitive, &s->continueOnMatch );
            if ( !match )
                currentPage++;
        }

        // if no match found, loop through the whole doc, starting from currentPage
        if ( !match )
        {
            const int pageCount = pages_vector.count();
            for ( int i = 0; i < pageCount; i++ )
            {
                if ( currentPage >= pageCount )
                {
                    if ( noDialogs || KMessageBox::questionYesNo(0, i18n("End of document reached.\nContinue from the beginning?"), QString::null, KStdGuiItem::cont(), KStdGuiItem::cancel()) == KMessageBox::Yes )
                        currentPage = 0;
                    else
                        break;
                }
                // get page
                KPDFPage * page = pages_vector[ currentPage ];
                // request search page if needed
                if ( !page->hasSearchPage() )
                    requestTextPage( page->number() );
                // if found a match on the current page, end the loop
                if ( ( match = page->findText( searchID, text, FromTop, caseSensitive ) ) )
                    break;
                currentPage++;
            }
        }

        // reset cursor to previous shape
        QApplication::restoreOverrideCursor();

        // if a match has been found..
        if ( match )
        {
            // update the RunningSearch structure adding this match..
            foundAMatch = true;
            s->continueOnPage = currentPage;
            s->continueOnMatch = *match;
            s->highlightedPages.append( currentPage );
            // ..add highlight to the page..
            pages_vector[ currentPage ]->setHighlight( searchID, match, color );

            // ..queue page for notifying changes..
            if ( !pagesToNotify.contains( currentPage ) )
                pagesToNotify.append( currentPage );

            // ..move the viewport to show the first of the searched word sequence centered
            if ( moveViewport )
            {
                DocumentViewport searchViewport( currentPage );
                searchViewport.rePos.enabled = true;
                searchViewport.rePos.normalizedX = (match->first()->left + match->first()->right) / 2.0;
                searchViewport.rePos.normalizedY = (match->first()->top + match->first()->bottom) / 2.0;
                setViewport( searchViewport, -1, true );
            }
        }
        else if ( !noDialogs )
            KMessageBox::information( 0, i18n( "No matches found for '%1'.", text ) );
    }
    // 3. PREVMATCH //TODO
    else if ( type == PrevMatch )
    {
    }
    // 4. GOOGLE* - process all document marking pages
    else if ( type == GoogleAll || type == GoogleAny )
    {
        // search and highlight every word in 'text' on all pages
        bool matchAll = type == GoogleAll;
        QStringList words = text.split( " ", QString::SkipEmptyParts );
        int wordsCount = words.count(),
            hueStep = (wordsCount > 1) ? (60 / (wordsCount - 1)) : 60,
            baseHue, baseSat, baseVal;
        color.getHsv( &baseHue, &baseSat, &baseVal );
        QVector< KPDFPage * >::iterator it = pages_vector.begin(), end = pages_vector.end();
        for ( ; it != end; ++it )
        {
            // get page (from the first to the last)
            KPDFPage * page = *it;
            int pageNumber = page->number();

            // request search page if needed
            if ( !page->hasSearchPage() )
                requestTextPage( pageNumber );

            // loop on a page adding highlights for all found items
            bool allMatched = wordsCount > 0,
                 anyMatched = false;
            for ( int w = 0; w < wordsCount; w++ )
            {
                QString word = words[ w ];
                int newHue = baseHue - w * hueStep;
                if ( newHue < 0 )
                    newHue += 360;
                QColor wordColor = QColor::fromHsv( newHue, baseSat, baseVal );
                RegularAreaRect * lastMatch = 0;
                // add all highlights for current word
                bool wordMatched = false;
                while ( 1 )
                {
                    if ( lastMatch )
                        lastMatch = page->findText( searchID, word, NextRes, caseSensitive, lastMatch );
                    else
                        lastMatch = page->findText( searchID, word, FromTop, caseSensitive);

                    if ( !lastMatch )
                        break;

                    // add highligh rect to the page
                    page->setHighlight( searchID, lastMatch, wordColor );
                    wordMatched = true;
                }
                allMatched = allMatched && wordMatched;
                anyMatched = anyMatched || wordMatched;
            }

            // if not all words are present in page, remove partial highlights
            if ( !allMatched && matchAll )
                page->deleteHighlights( searchID );

            // if page contains all words, udpate internals and queue page for notify
            if ( (allMatched && matchAll) || (anyMatched && !matchAll) )
            {
                foundAMatch = true;
                s->highlightedPages.append( pageNumber );
                if ( !pagesToNotify.contains( pageNumber ) )
                    pagesToNotify.append( pageNumber );
            }
        }

        // reset cursor to previous shape
        QApplication::restoreOverrideCursor();

        // send page lists to update observers (since some filter on bookmarks)
        foreachObserver( notifySetup( pages_vector, false ) );
    }

    // notify observers about highlights changes
    QLinkedList< int >::iterator nIt = pagesToNotify.begin(), nEnd = pagesToNotify.end();
    for ( ; nIt != nEnd; ++nIt )
        foreachObserver( notifyPageChanged( *nIt, DocumentObserver::Highlights ) );

    // return if search has found one or more matches
    return foundAMatch;
}

bool KPDFDocument::continueSearch( int searchID )
{
    // check if searchID is present in runningSearches
    if ( !d->searches.contains( searchID ) )
        return false;

    // start search with cached parameters from last search by searchID
    RunningSearch * p = d->searches[ searchID ];
    return searchText( searchID, p->cachedString, false, p->cachedCaseSensitive,
                       p->cachedType, p->cachedViewportMove, p->cachedColor,
                       p->cachedNoDialogs );
}

void KPDFDocument::resetSearch( int searchID )