okular/core/page.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2004 by Enrico Ros <eros.kde@email.it>                  *
   3  *   This program is free software; you can redistribute it and/or modify  *
   4  *   it under the terms of the GNU General Public License as published by  *
   5  *   the Free Software Foundation; either version 2 of the License, or     *
   6  *   (at your option) any later version.                                   *
   7  ***************************************************************************/
   8
   9 #include "page.h"
  10 #include "page_p.h"
  11
  12 // qt/kde includes
  13 #include <QtCore/QHash>
  14 #include <QtCore/QSet>
  15 #include <QtCore/QString>
  16 #include <QtCore/QVariant>
  17 #include <QtGui/QPixmap>
  18 #include <QtXml/QDomDocument>
  19 #include <QtXml/QDomElement>
  20
  21 #include <kdebug.h>
  22
  23 // local includes
  24 #include "action.h"
  25 #include "annotations.h"
  26 #include "annotations_p.h"
  27 #include "area.h"
  28 #include "debug_p.h"
  29 #include "form.h"
  30 #include "form_p.h"
  31 #include "pagecontroller_p.h"
  32 #include "pagesize.h"
  33 #include "pagetransition.h"
  34 #include "rotationjob_p.h"
  35 #include "textpage.h"
  36 #include "textpage_p.h"
  37
  38 #ifdef PAGE_PROFILE
  39 #include <QtCore/QTime>
  40 #endif
  41
  42 using namespace Okular;
  43
  44 static void deleteObjectRects( QLinkedList< ObjectRect * >& rects, const QSet<ObjectRect::ObjectType>& which )
  45 {
  46     QLinkedList< ObjectRect * >::iterator it = rects.begin(), end = rects.end();
  47     for ( ; it != end; )
  48         if ( which.contains( (*it)->objectType() ) )
  49         {
  50             delete *it;
  51             it = rects.erase( it );
  52         }
  53         else
  54             ++it;
  55 }
  56
  57 PagePrivate::PagePrivate( Page *page, uint n, double w, double h, Rotation o )
  58     : m_page( page ), m_number( n ), m_orientation( o ),
  59       m_width( w ), m_height( h ), m_boundingBox( 0, 0, 1, 1 ),
  60       m_rotation( Rotation0 ), m_maxuniqueNum( 0 ),
  61       m_text( 0 ), m_transition( 0 ), m_textSelections( 0 ),
  62       m_openingAction( 0 ), m_closingAction( 0 ), m_duration( -1 ),
  63       m_isBoundingBoxKnown( false )
  64 {
  65     // avoid Division-By-Zero problems in the program
  66     if ( m_width <= 0 )
  67         m_width = 1;
  68
  69     if ( m_height <= 0 )
  70         m_height = 1;
  71 }
  72
  73 PagePrivate::~PagePrivate()
  74 {
  75     qDeleteAll( formfields );
  76     delete m_openingAction;
  77     delete m_closingAction;
  78     delete m_text;
  79     delete m_transition;
  80 }
  81
  82
  83 void PagePrivate::imageRotationDone( RotationJob * job )
  84 {
  85     QMap< int, PixmapObject >::iterator it = m_pixmaps.find( job->id() );
  86     if ( it != m_pixmaps.end() )
  87     {
  88         PixmapObject &object = it.value();
  89         (*object.m_pixmap) = QPixmap::fromImage( job->image() );
  90         object.m_rotation = job->rotation();
  91     } else {
  92         PixmapObject object;
  93         object.m_pixmap = new QPixmap( QPixmap::fromImage( job->image() ) );
  94         object.m_rotation = job->rotation();
  95
  96         m_pixmaps.insert( job->id(), object );
  97     }
  98 }
  99
 100 QMatrix PagePrivate::rotationMatrix() const
 101 {
 102     QMatrix matrix;
 103     matrix.rotate( (int)m_rotation * 90 );
 104
 105     switch ( m_rotation )
 106     {
 107         case Rotation90:
 108             matrix.translate( 0, -1 );
 109             break;
 110         case Rotation180:
 111             matrix.translate( -1, -1 );
 112             break;
 113         case Rotation270:
 114             matrix.translate( -1, 0 );
 115             break;
 116         default: ;
 117     }
 118
 119     return matrix;
 120 }
 121
 122 /** class Page **/
 123
 124 Page::Page( uint page, double w, double h, Rotation o )
 125     : d( new PagePrivate( this, page, w, h, o ) )
 126 {
 127 }
 128
 129 Page::~Page()
 130 {
 131     deletePixmaps();
 132     deleteRects();
 133     d->deleteHighlights();
 134     deleteAnnotations();
 135     d->deleteTextSelections();
 136     deleteSourceReferences();
 137
 138     delete d;
 139 }
 140
 141 int Page::number() const
 142 {
 143     return d->m_number;
 144 }
 145
 146 Rotation Page::orientation() const
 147 {
 148     return d->m_orientation;
 149 }
 150
 151 Rotation Page::rotation() const
 152 {
 153     return d->m_rotation;
 154 }
 155
 156 Rotation Page::totalOrientation() const
 157 {
 158     return (Rotation)( ( (int)d->m_orientation + (int)d->m_rotation ) % 4 );
 159 }
 160
 161 double Page::width() const
 162 {
 163     return d->m_width;
 164 }
 165
 166 double Page::height() const
 167 {
 168     return d->m_height;
 169 }
 170
 171 double Page::ratio() const
 172 {
 173     return d->m_height / d->m_width;
 174 }
 175
 176 NormalizedRect Page::boundingBox() const
 177 {
 178     return d->m_boundingBox;
 179 }
 180
 181 bool Page::isBoundingBoxKnown() const
 182 {
 183     return d->m_isBoundingBoxKnown;
 184 }
 185
 186 void Page::setBoundingBox( const NormalizedRect& bbox )
 187 {
 188     if ( d->m_isBoundingBoxKnown && d->m_boundingBox == bbox )
 189         return;
 190
 191     // Allow tiny rounding errors (happens during rotation)
 192     static const double epsilon = 0.00001;
 193     Q_ASSERT( bbox.left >= -epsilon && bbox.top >= -epsilon && bbox.right <= 1 + epsilon && bbox.bottom <= 1 + epsilon );
 194
 195     d->m_boundingBox = bbox & NormalizedRect( 0., 0., 1., 1. );
 196     d->m_isBoundingBoxKnown = true;
 197 }
 198
 199 bool Page::hasPixmap( int id, int width, int height ) const
 200 {
 201     QMap< int, PagePrivate::PixmapObject >::const_iterator it = d->m_pixmaps.constFind( id );
 202     if ( it == d->m_pixmaps.constEnd() )
 203         return false;
 204
 205     if ( width == -1 || height == -1 )
 206         return true;
 207
 208     const QPixmap *pixmap = it.value().m_pixmap;
 209
 210     return (pixmap->width() == width && pixmap->height() == height);
 211 }
 212
 213 bool Page::hasTextPage() const
 214 {
 215     return d->m_text != 0;
 216 }
 217
 218 RegularAreaRect * Page::textArea ( TextSelection * selection ) const
 219 {
 220     if ( d->m_text )
 221         return d->m_text->textArea( selection );
 222
 223     return 0;
 224 }
 225
 226 bool Page::hasObjectRect( double x, double y, double xScale, double yScale ) const
 227 {
 228     if ( m_rects.isEmpty() )
 229         return false;
 230
 231     QLinkedList< ObjectRect * >::const_iterator it = m_rects.begin(), end = m_rects.end();
 232     for ( ; it != end; ++it )
 233         if ( (*it)->contains( x, y, xScale, yScale ) )
 234             return true;
 235
 236     return false;
 237 }
 238
 239 bool Page::hasHighlights( int s_id ) const
 240 {
 241     // simple case: have no highlights
 242     if ( m_highlights.isEmpty() )
 243         return false;
 244     // simple case: we have highlights and no id to match
 245     if ( s_id == -1 )
 246         return true;
 247     // iterate on the highlights list to find an entry by id
 248     QLinkedList< HighlightAreaRect * >::const_iterator it = m_highlights.begin(), end = m_highlights.end();
 249     for ( ; it != end; ++it )
 250         if ( (*it)->s_id == s_id )
 251             return true;
 252     return false;
 253 }
 254
 255 bool Page::hasTransition() const
 256 {
 257     return d->m_transition != 0;
 258 }
 259
 260 bool Page::hasAnnotations() const
 261 {
 262     return !m_annotations.isEmpty();
 263 }
 264
 265 RegularAreaRect * Page::findText( int id, const QString & text, SearchDirection direction,
 266                                   Qt::CaseSensitivity caseSensitivity, const RegularAreaRect *lastRect ) const
 267 {
 268     RegularAreaRect* rect = 0;
 269     if ( text.isEmpty() || !d->m_text )
 270         return rect;
 271
 272     rect = d->m_text->findText( id, text, direction, caseSensitivity, lastRect );
 273     return rect;
 274 }
 275
 276 QString Page::text( const RegularAreaRect * area ) const
 277 {
 278     QString ret;
 279
 280     if ( !d->m_text )
 281         return ret;
 282
 283     if ( area )
 284     {
 285         RegularAreaRect rotatedArea = *area;
 286         rotatedArea.transform( d->rotationMatrix().inverted() );
 287
 288         ret = d->m_text->text( &rotatedArea );
 289     }
 290     else
 291         ret = d->m_text->text();
 292
 293     return ret;
 294 }
 295
 296 void PagePrivate::rotateAt( Rotation orientation )
 297 {
 298     if ( orientation == m_rotation )
 299         return;
 300
 301     deleteHighlights();
 302     deleteTextSelections();
 303
 304     if ( ( (int)m_orientation + (int)m_rotation ) % 2 != ( (int)m_orientation + (int)orientation ) % 2 )
 305         qSwap( m_width, m_height );
 306
 307     Rotation oldRotation = m_rotation;
 308     m_rotation = orientation;
 309
 310     /**
 311      * Rotate the images of the page.
 312      */
 313     QMapIterator< int, PagePrivate::PixmapObject > it( m_pixmaps );
 314     while ( it.hasNext() ) {
 315         it.next();
 316
 317         const PagePrivate::PixmapObject &object = it.value();
 318
 319         RotationJob *job = new RotationJob( object.m_pixmap->toImage(), object.m_rotation, m_rotation, it.key() );
 320         job->setPage( this );
 321         PageController::self()->addRotationJob(job);
 322     }
 323
 324     /**
 325      * Rotate the object rects on the page.
 326      */
 327     const QMatrix matrix = rotationMatrix();
 328     QLinkedList< ObjectRect * >::const_iterator objectIt = m_page->m_rects.begin(), end = m_page->m_rects.end();
 329     for ( ; objectIt != end; ++objectIt )
 330         (*objectIt)->transform( matrix );
 331
 332     QLinkedList< HighlightAreaRect* >::const_iterator hlIt = m_page->m_highlights.begin(), hlItEnd = m_page->m_highlights.end();
 333     for ( ; hlIt != hlItEnd; ++hlIt )
 334     {
 335         (*hlIt)->transform( RotationJob::rotationMatrix( oldRotation, m_rotation ) );
 336     }
 337 }
 338
 339 void PagePrivate::changeSize( const PageSize &size )
 340 {
 341     if ( size.isNull() || ( size.width() == m_width && size.height() == m_height ) )
 342         return;
 343
 344     m_page->deletePixmaps();
 345 //    deleteHighlights();
 346 //    deleteTextSelections();
 347
 348     m_width = size.width();
 349     m_height = size.height();
 350     if ( m_rotation % 2 )
 351         qSwap( m_width, m_height );
 352 }
 353
 354 const ObjectRect * Page::objectRect( ObjectRect::ObjectType type, double x, double y, double xScale, double yScale ) const
 355 {
 356     QLinkedList< ObjectRect * >::const_iterator it = m_rects.begin(), end = m_rects.end();
 357     for ( ; it != end; ++it )
 358         if ( ( (*it)->objectType() == type ) && (*it)->contains( x, y, xScale, yScale ) )
 359             return *it;
 360     return 0;
 361 }
 362
 363 const PageTransition * Page::transition() const
 364 {
 365     return d->m_transition;
 366 }
 367
 368 QLinkedList< Annotation* > Page::annotations() const
 369 {
 370     return m_annotations;
 371 }
 372
 373 const Action * Page::pageAction( PageAction action ) const
 374 {
 375     switch ( action )
 376     {
 377         case Page::Opening:
 378             return d->m_openingAction;
 379             break;
 380         case Page::Closing:
 381             return d->m_closingAction;
 382             break;
 383     }
 384
 385     return 0;
 386 }
 387
 388 QLinkedList< FormField * > Page::formFields() const
 389 {
 390     return d->formfields;
 391 }
 392
 393 void Page::setPixmap( int id, QPixmap *pixmap )
 394 {
 395     if ( d->m_rotation == Rotation0 ) {
 396         QMap< int, PagePrivate::PixmapObject >::iterator it = d->m_pixmaps.find( id );
 397         if ( it != d->m_pixmaps.end() )
 398         {
 399             delete it.value().m_pixmap;
 400         }
 401         else
 402         {
 403             it = d->m_pixmaps.insert( id, PagePrivate::PixmapObject() );
 404         }
 405         it.value().m_pixmap = pixmap;
 406         it.value().m_rotation = d->m_rotation;
 407     } else {
 408         RotationJob *job = new RotationJob( pixmap->toImage(), Rotation0, d->m_rotation, id );
 409         job->setPage( d );
 410         PageController::self()->addRotationJob(job);
 411
 412         delete pixmap;
 413     }
 414 }
 415
 416 void Page::setTextPage( TextPage * textPage )
 417 {
 418     delete d->m_text;
 419
 420     d->m_text = textPage;
 421     if ( d->m_text )
 422     {
 423         d->m_text->d->m_page = d;
 424     }
 425 }
 426
 427 void Page::setObjectRects( const QLinkedList< ObjectRect * > & rects )
 428 {
 429     QSet<ObjectRect::ObjectType> which;
 430     which << ObjectRect::Action << ObjectRect::Image;
 431     deleteObjectRects( m_rects, which );
 432
 433     /**
 434      * Rotate the object rects of the page.
 435      */
 436     const QMatrix matrix = d->rotationMatrix();
 437
 438     QLinkedList< ObjectRect * >::const_iterator objectIt = rects.begin(), end = rects.end();
 439     for ( ; objectIt != end; ++objectIt )
 440         (*objectIt)->transform( matrix );
 441
 442     m_rects << rects;
 443 }
 444
 445 void PagePrivate::setHighlight( int s_id, RegularAreaRect *rect, const QColor & color )
 446 {
 447     HighlightAreaRect * hr = new HighlightAreaRect(rect);
 448     hr->s_id = s_id;
 449     hr->color = color;
 450
 451     m_page->m_highlights.append( hr );
 452 }
 453
 454 void PagePrivate::setTextSelections( RegularAreaRect *r, const QColor & color )
 455 {
 456     deleteTextSelections();
 457     if ( r )
 458     {
 459         HighlightAreaRect * hr = new HighlightAreaRect( r );
 460         hr->s_id = -1;
 461         hr->color = color;
 462         m_textSelections = hr;
 463         delete r;
 464     }
 465 }
 466
 467 void Page::setSourceReferences( const QLinkedList< SourceRefObjectRect * > & refRects )
 468 {
 469     deleteSourceReferences();
 470     foreach( SourceRefObjectRect * rect, refRects )
 471         m_rects << rect;
 472 }
 473
 474 void Page::setDuration( double seconds )
 475 {
 476     d->m_duration = seconds;
 477 }
 478
 479 double Page::duration() const
 480 {
 481     return d->m_duration;
 482 }
 483
 484 void Page::setLabel( const QString& label )
 485 {
 486     d->m_label = label;
 487 }
 488
 489 QString Page::label() const
 490 {
 491     return d->m_label;
 492 }
 493
 494 const RegularAreaRect * Page::textSelection() const
 495 {
 496     return d->m_textSelections;
 497 }
 498
 499 QColor Page::textSelectionColor() const
 500 {
 501     return d->m_textSelections ? d->m_textSelections->color : QColor();
 502 }
 503
 504 void Page::addAnnotation( Annotation * annotation )
 505 {
 506     //uniqueName: okular-PAGENUM-ID
 507     if(annotation->uniqueName().isEmpty())
 508     {
 509         QString uniqueName = "okular-";
 510         uniqueName += ( QString::number(d->m_number) + '-' + QString::number(++(d->m_maxuniqueNum)) );
 511
 512         kDebug(OkularDebug).nospace() << "inc m_maxuniqueNum=" << d->m_maxuniqueNum;
 513
 514         annotation->setUniqueName( uniqueName );
 515     }
 516     annotation->d_ptr->m_page = d;
 517     m_annotations.append( annotation );
 518
 519     AnnotationObjectRect *rect = new AnnotationObjectRect( annotation );
 520
 521     // Rotate the annotation on the page.
 522     const QMatrix matrix = d->rotationMatrix();
 523     annotation->d_ptr->baseTransform( matrix.inverted() );
 524     annotation->d_ptr->annotationTransform( matrix );
 525
 526     m_rects.append( rect );
 527 }
 528
 529 void PagePrivate::modifyAnnotation(Annotation * newannotation )
 530 {
 531     if(!newannotation)
 532         return;
 533
 534     QLinkedList< Annotation * >::iterator aIt = m_page->m_annotations.begin(), aEnd = m_page->m_annotations.end();
 535     for ( ; aIt != aEnd; ++aIt )
 536     {
 537         if((*aIt)==newannotation)
 538             return; //modified already
 539         if((*aIt) && (*aIt)->uniqueName()==newannotation->uniqueName())
 540         {
 541             int rectfound = false;
 542             QLinkedList< ObjectRect * >::iterator it = m_page->m_rects.begin(), end = m_page->m_rects.end();
 543             for ( ; it != end && !rectfound; ++it )
 544                 if ( ( (*it)->objectType() == ObjectRect::OAnnotation ) && ( (*it)->object() == (*aIt) ) )
 545                 {
 546                     delete *it;
 547                     *it = new AnnotationObjectRect( newannotation );
 548                     rectfound = true;
 549                 }
 550             delete *aIt;
 551             *aIt = newannotation;
 552             break;
 553         }
 554     }
 555 }
 556
 557 bool Page::removeAnnotation( Annotation * annotation )
 558 {
 559     if ( !annotation || ( annotation->flags() & Annotation::DenyDelete ) )
 560         return false;
 561
 562     QLinkedList< Annotation * >::iterator aIt = m_annotations.begin(), aEnd = m_annotations.end();
 563     for ( ; aIt != aEnd; ++aIt )
 564     {
 565         if((*aIt) && (*aIt)->uniqueName()==annotation->uniqueName())
 566         {
 567             int rectfound = false;
 568             QLinkedList< ObjectRect * >::iterator it = m_rects.begin(), end = m_rects.end();
 569             for ( ; it != end && !rectfound; ++it )
 570                 if ( ( (*it)->objectType() == ObjectRect::OAnnotation ) && ( (*it)->object() == (*aIt) ) )
 571                 {
 572                     delete *it;
 573                     it = m_rects.erase( it );
 574                     rectfound = true;
 575                 }
 576             kDebug(OkularDebug) << "removed annotation:" << annotation->uniqueName();
 577             delete *aIt;
 578             m_annotations.erase( aIt );
 579             break;
 580         }
 581     }
 582
 583     return true;
 584 }
 585
 586 void Page::setTransition( PageTransition * transition )
 587 {
 588     delete d->m_transition;
 589     d->m_transition = transition;
 590 }
 591
 592 void Page::setPageAction( PageAction action, Action * link )
 593 {
 594     switch ( action )
 595     {
 596         case Page::Opening:
 597             delete d->m_openingAction;
 598             d->m_openingAction = link;
 599             break;
 600         case Page::Closing:
 601             delete d->m_closingAction;
 602             d->m_closingAction = link;
 603             break;
 604     }
 605 }
 606
 607 void Page::setFormFields( const QLinkedList< FormField * >& fields )
 608 {
 609     qDeleteAll( d->formfields );
 610     d->formfields = fields;
 611     QLinkedList< FormField * >::const_iterator it = d->formfields.begin(), itEnd = d->formfields.end();
 612     for ( ; it != itEnd; ++it )
 613     {
 614         (*it)->d_ptr->setDefault();
 615     }
 616 }
 617
 618 void Page::deletePixmap( int id )
 619 {
 620     PagePrivate::PixmapObject object = d->m_pixmaps.take( id );
 621     delete object.m_pixmap;
 622 }
 623
 624 void Page::deletePixmaps()
 625 {
 626     QMapIterator< int, PagePrivate::PixmapObject > it( d->m_pixmaps );
 627     while ( it.hasNext() ) {
 628         it.next();
 629         delete it.value().m_pixmap;
 630     }
 631
 632     d->m_pixmaps.clear();
 633 }
 634
 635 void Page::deleteRects()
 636 {
 637     // delete ObjectRects of type Link and Image
 638     QSet<ObjectRect::ObjectType> which;
 639     which << ObjectRect::Action << ObjectRect::Image;
 640     deleteObjectRects( m_rects, which );
 641 }
 642
 643 void PagePrivate::deleteHighlights( int s_id )
 644 {
 645     // delete highlights by ID
 646     QLinkedList< HighlightAreaRect* >::iterator it = m_page->m_highlights.begin(), end = m_page->m_highlights.end();
 647     while ( it != end )
 648     {
 649         HighlightAreaRect* highlight = *it;
 650         if ( s_id == -1 || highlight->s_id == s_id )
 651         {
 652             it = m_page->m_highlights.erase( it );
 653             delete highlight;
 654         }
 655         else
 656             ++it;
 657     }
 658 }
 659
 660 void PagePrivate::deleteTextSelections()
 661 {
 662     delete m_textSelections;
 663     m_textSelections = 0;
 664 }
 665
 666 void Page::deleteSourceReferences()
 667 {
 668     deleteObjectRects( m_rects, QSet<ObjectRect::ObjectType>() << ObjectRect::SourceRef );
 669 }
 670
 671 void Page::deleteAnnotations()
 672 {
 673     // delete ObjectRects of type Annotation
 674     deleteObjectRects( m_rects, QSet<ObjectRect::ObjectType>() << ObjectRect::OAnnotation );
 675     // delete all stored annotations
 676     QLinkedList< Annotation * >::const_iterator aIt = m_annotations.begin(), aEnd = m_annotations.end();
 677     for ( ; aIt != aEnd; ++aIt )
 678         delete *aIt;
 679     m_annotations.clear();
 680 }
 681
 682 void PagePrivate::restoreLocalContents( const QDomNode & pageNode )
 683 {
 684     // iterate over all chilren (annotationList, ...)
 685     QDomNode childNode = pageNode.firstChild();
 686     while ( childNode.isElement() )
 687     {
 688         QDomElement childElement = childNode.toElement();
 689         childNode = childNode.nextSibling();
 690
 691         // parse annotationList child element
 692         if ( childElement.tagName() == "annotationList" )
 693         {
 694 #ifdef PAGE_PROFILE
 695             QTime time;
 696             time.start();
 697 #endif
 698
 699             // iterate over all annotations
 700             QDomNode annotationNode = childElement.firstChild();
 701             while( annotationNode.isElement() )
 702             {
 703                 // get annotation element and advance to next annot
 704                 QDomElement annotElement = annotationNode.toElement();
 705                 annotationNode = annotationNode.nextSibling();
 706
 707                 // get annotation from the dom element
 708                 Annotation * annotation = AnnotationUtils::createAnnotation( annotElement );
 709
 710                 // append annotation to the list or show warning
 711                 if ( annotation )
 712                 {
 713                     annotation->d_ptr->m_page = this;
 714                     m_page->m_annotations.append( annotation );
 715                     m_page->m_rects.append( new AnnotationObjectRect( annotation ) );
 716                     int pos = annotation->uniqueName().lastIndexOf("-");
 717                     if(pos != -1)
 718                     {
 719                         int uniqID=annotation->uniqueName().right(annotation->uniqueName().length()-pos-1).toInt();
 720                         if ( m_maxuniqueNum < uniqID )
 721                             m_maxuniqueNum = uniqID;
 722                     }
 723
 724                     kDebug(OkularDebug) << "restored annot:" << annotation->uniqueName();
 725                 }
 726                 else
 727                     kWarning(OkularDebug).nospace() << "page (" << m_number << "): can't restore an annotation from XML.";
 728             }
 729 #ifdef PAGE_PROFILE
 730             kDebug(OkularDebug).nospace() << "annots: XML Load time: " << time.elapsed() << "ms";
 731 #endif
 732         }
 733         // parse formList child element
 734         else if ( childElement.tagName() == "forms" )
 735         {
 736             if ( formfields.isEmpty() )
 737                 continue;
 738
 739             QHash<int, FormField*> hashedforms;
 740             QLinkedList< FormField * >::const_iterator fIt = formfields.begin(), fItEnd = formfields.end();
 741             for ( ; fIt != fItEnd; ++fIt )
 742             {
 743                 hashedforms[(*fIt)->id()] = (*fIt);
 744             }
 745
 746             // iterate over all forms
 747             QDomNode formsNode = childElement.firstChild();
 748             while( formsNode.isElement() )
 749             {
 750                 // get annotation element and advance to next annot
 751                 QDomElement formElement = formsNode.toElement();
 752                 formsNode = formsNode.nextSibling();
 753
 754                 if ( formElement.tagName() != "form" )
 755                     continue;
 756
 757                 bool ok = true;
 758                 int index = formElement.attribute( "id" ).toInt( &ok );
 759                 if ( !ok )
 760                     continue;
 761
 762                 QHash<int, FormField*>::const_iterator wantedIt = hashedforms.constFind( index );
 763                 if ( wantedIt == hashedforms.constEnd() )
 764                     continue;
 765
 766                 QString value = formElement.attribute( "value" );
 767                 (*wantedIt)->d_ptr->setValue( value );
 768             }
 769         }
 770     }
 771 }
 772
 773 void PagePrivate::saveLocalContents( QDomNode & parentNode, QDomDocument & document, PageItems what ) const
 774 {
 775     // only add a node if there is some stuff to write into
 776     if ( m_page->m_annotations.isEmpty() && formfields.isEmpty() )
 777         return;
 778
 779     // create the page node and set the 'number' attribute
 780     QDomElement pageElement = document.createElement( "page" );
 781     pageElement.setAttribute( "number", m_number );
 782
 783 #if 0
 784     // add bookmark info if is bookmarked
 785     if ( d->m_bookmarked )
 786     {
 787         // create the pageElement's 'bookmark' child
 788         QDomElement bookmarkElement = document.createElement( "bookmark" );
 789         pageElement.appendChild( bookmarkElement );
 790
 791         // add attributes to the element
 792         //bookmarkElement.setAttribute( "name", bookmark name );
 793     }
 794 #endif
 795
 796     // add annotations info if has got any
 797     if ( ( what & AnnotationPageItems ) && !m_page->m_annotations.isEmpty() )
 798     {
 799         // create the annotationList
 800         QDomElement annotListElement = document.createElement( "annotationList" );
 801
 802         // add every annotation to the annotationList
 803         QLinkedList< Annotation * >::const_iterator aIt = m_page->m_annotations.constBegin(), aEnd = m_page->m_annotations.constEnd();
 804         for ( ; aIt != aEnd; ++aIt )
 805         {
 806             // get annotation
 807             const Annotation * a = *aIt;
 808             // only save okular annotations (not the embedded in file ones)
 809             if ( !(a->flags() & Annotation::External) )
 810             {
 811                 // append an filled-up element called 'annotation' to the list
 812                 QDomElement annElement = document.createElement( "annotation" );
 813                 AnnotationUtils::storeAnnotation( a, annElement, document );
 814                 annotListElement.appendChild( annElement );
 815                 kDebug(OkularDebug) << "save annotation:" << a->uniqueName();
 816             }
 817         }
 818
 819         // append the annotationList element if annotations have been set
 820         if ( annotListElement.hasChildNodes() )
 821             pageElement.appendChild( annotListElement );
 822     }
 823
 824     // add forms info if has got any
 825     if ( ( what & FormFieldPageItems ) && !formfields.isEmpty() )
 826     {
 827         // create the formList
 828         QDomElement formListElement = document.createElement( "forms" );
 829
 830         // add every form data to the formList
 831         QLinkedList< FormField * >::const_iterator fIt = formfields.constBegin(), fItEnd = formfields.constEnd();
 832         for ( ; fIt != fItEnd; ++fIt )
 833         {
 834             // get the form field
 835             const FormField * f = *fIt;
 836
 837             QString newvalue = f->d_ptr->value();
 838             if ( f->d_ptr->m_default == newvalue )
 839                 continue;
 840
 841             // append an filled-up element called 'annotation' to the list
 842             QDomElement formElement = document.createElement( "form" );
 843             formElement.setAttribute( "id", f->id() );
 844             formElement.setAttribute( "value", newvalue );
 845             formListElement.appendChild( formElement );
 846         }
 847
 848         // append the annotationList element if annotations have been set
 849         if ( formListElement.hasChildNodes() )
 850             pageElement.appendChild( formListElement );
 851     }
 852
 853     // append the page element only if has children
 854     if ( pageElement.hasChildNodes() )
 855         parentNode.appendChild( pageElement );
 856 }
 857
 858 const QPixmap * Page::_o_nearestPixmap( int pixID, int w, int h ) const
 859 {
 860     Q_UNUSED( h )
 861
 862     const QPixmap * pixmap = 0;
 863
 864     // if a pixmap is present for given id, use it
 865     QMap< int, PagePrivate::PixmapObject >::const_iterator itPixmap = d->m_pixmaps.constFind( pixID );
 866     if ( itPixmap != d->m_pixmaps.constEnd() )
 867         pixmap = itPixmap.value().m_pixmap;
 868     // else find the closest match using pixmaps of other IDs (great optim!)
 869     else if ( !d->m_pixmaps.isEmpty() )
 870     {
 871         int minDistance = -1;
 872         QMap< int, PagePrivate::PixmapObject >::const_iterator it = d->m_pixmaps.constBegin(), end = d->m_pixmaps.constEnd();
 873         for ( ; it != end; ++it )
 874         {
 875             int pixWidth = (*it).m_pixmap->width(),
 876                 distance = pixWidth > w ? pixWidth - w : w - pixWidth;
 877             if ( minDistance == -1 || distance < minDistance )
 878             {
 879                 pixmap = (*it).m_pixmap;
 880                 minDistance = distance;
 881             }
 882         }
 883     }
 884
 885     return pixmap;
 886 }