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Diffstat (limited to 'kpdf/core/page.cpp')
| -rw-r--r-- | kpdf/core/page.cpp | 327 |
1 files changed, 327 insertions, 0 deletions
diff --git a/kpdf/core/page.cpp b/kpdf/core/page.cpp new file mode 100644 index 00000000..e6a847a8 --- /dev/null +++ b/kpdf/core/page.cpp @@ -0,0 +1,327 @@ +/*************************************************************************** + * Copyright (C) 2004 by Enrico Ros <eros.kde@email.it> * + * * + * This program is free software; you can redistribute it and/or modify * + * it under the terms of the GNU General Public License as published by * + * the Free Software Foundation; either version 2 of the License, or * + * (at your option) any later version. * + ***************************************************************************/ + +// qt/kde includes +#include <qpixmap.h> +#include <qstring.h> +#include <qmap.h> +#include <kdebug.h> + +// local includes +#include "page.h" +#include "pagetransition.h" +#include "link.h" +#include "conf/settings.h" +#include "xpdf/TextOutputDev.h" + + +/** class KPDFPage **/ + +KPDFPage::KPDFPage( uint page, float w, float h, int r ) + : m_number( page ), m_rotation( r ), m_width( w ), m_height( h ), + m_bookmarked( false ), m_text( 0 ), m_transition( 0 ) +{ + // if landscape swap width <-> height (rotate 90deg CCW) + if ( r == 90 || r == 270 ) + { + m_width = h; + m_height = w; + } + // avoid Division-By-Zero problems in the program + if ( m_width <= 0 ) + m_width = 1; + if ( m_height <= 0 ) + m_height = 1; +} + +KPDFPage::~KPDFPage() +{ + deletePixmapsAndRects(); + deleteHighlights(); + delete m_text; + delete m_transition; +} + + +bool KPDFPage::hasPixmap( int id, int width, int height ) const +{ + if ( !m_pixmaps.contains( id ) ) + return false; + if ( width == -1 || height == -1 ) + return true; + QPixmap * p = m_pixmaps[ id ]; + return p ? ( p->width() == width && p->height() == height ) : false; +} + +bool KPDFPage::hasSearchPage() const +{ + return m_text != 0; +} + +bool KPDFPage::hasBookmark() const +{ + return m_bookmarked; +} + +bool KPDFPage::hasObjectRect( double x, double y ) const +{ + if ( m_rects.count() < 1 ) + return false; + QValueList< ObjectRect * >::const_iterator it = m_rects.begin(), end = m_rects.end(); + for ( ; it != end; ++it ) + if ( (*it)->contains( x, y ) ) + return true; + return false; +} + +bool KPDFPage::hasHighlights( int s_id ) const +{ + // simple case: have no highlights + if ( m_highlights.isEmpty() ) + return false; + // simple case: we have highlights and no id to match + if ( s_id == -1 ) + return true; + // iterate on the highlights list to find an entry by id + QValueList< HighlightRect * >::const_iterator it = m_highlights.begin(), end = m_highlights.end(); + for ( ; it != end; ++it ) + if ( (*it)->s_id == s_id ) + return true; + return false; +} + +bool KPDFPage::hasTransition() const +{ + return m_transition != 0; +} + + +NormalizedRect * KPDFPage::findText( const QString & text, bool strictCase, NormalizedRect * lastRect ) const +{ + if ( text.isEmpty() ) + return 0; + + // create a xpf's Unicode (unsigned int) array for the given text + const QChar * str = text.unicode(); + int len = text.length(); + QMemArray<Unicode> u(len); + for (int i = 0; i < len; ++i) + u[i] = str[i].unicode(); + + // find out the direction of search + enum SearchDir { FromTop, NextMatch, PrevMatch } dir = lastRect ? NextMatch : FromTop; + double sLeft, sTop, sRight, sBottom; + if ( dir == NextMatch ) + { + sLeft = lastRect->left * m_width; + sTop = lastRect->top * m_height; + sRight = lastRect->right * m_width; + sBottom = lastRect->bottom * m_height; + } + + // this loop is only for 'bad case' matches + bool found = false; + while ( !found ) + { + if ( dir == FromTop ) + found = m_text->findText( const_cast<Unicode*>(static_cast<const Unicode*>(u)), len, gTrue, gTrue, gFalse, gFalse, strictCase, gFalse, &sLeft, &sTop, &sRight, &sBottom ); + else if ( dir == NextMatch ) + found = m_text->findText( const_cast<Unicode*>(static_cast<const Unicode*>(u)), len, gFalse, gTrue, gTrue, gFalse, strictCase, gFalse, &sLeft, &sTop, &sRight, &sBottom ); + else if ( dir == PrevMatch ) + // FIXME: this doesn't work as expected (luckily backward search isn't yet used) + // TODO: check if the new xpdf 3.01 code is able of searching backwards + found = m_text->findText( const_cast<Unicode*>(static_cast<const Unicode*>(u)), len, gTrue, gFalse, gFalse, gTrue, strictCase, gTrue, &sLeft, &sTop, &sRight, &sBottom ); + + // if not found (even in case unsensitive search), terminate + if ( !found ) + break; + } + + // if the page was found, return a new normalizedRect + if ( found ) + return new NormalizedRect( sLeft / m_width, sTop / m_height, sRight / m_width, sBottom / m_height ); + return 0; +} + +const QString KPDFPage::getText( const NormalizedRect & rect ) const +{ + if ( !m_text ) + return QString::null; + int left = (int)( rect.left * m_width ), + top = (int)( rect.top * m_height ), + right = (int)( rect.right * m_width ), + bottom = (int)( rect.bottom * m_height ); + GString * text = m_text->getText( left, top, right, bottom ); + QString result = QString::fromUtf8( text->getCString() ); + delete text; + return result; +} + +const ObjectRect * KPDFPage::hasObject( ObjectRect::ObjectType type, double x, double y ) const +{ + QValueList< ObjectRect * >::const_iterator it = m_rects.begin(), end = m_rects.end(); + for ( ; it != end; ++it ) + if ( (*it)->contains( x, y ) ) + if ((*it)->objectType() == type) return *it; + return 0; +} + +const KPDFPageTransition * KPDFPage::getTransition() const +{ + return m_transition; +} + + +void KPDFPage::setPixmap( int id, QPixmap * pixmap ) +{ + if ( m_pixmaps.contains( id ) ) + delete m_pixmaps[id]; + m_pixmaps[id] = pixmap; +} + +void KPDFPage::setSearchPage( TextPage * tp ) +{ + delete m_text; + m_text = tp; +} + +void KPDFPage::setBookmark( bool state ) +{ + m_bookmarked = state; +} + +void KPDFPage::setObjectRects( const QValueList< ObjectRect * > rects ) +{ + QValueList< ObjectRect * >::iterator it = m_rects.begin(), end = m_rects.end(); + for ( ; it != end; ++it ) + delete *it; + m_rects = rects; +} + +void KPDFPage::setHighlight( int s_id, NormalizedRect * &rect, const QColor & color ) +{ + // create a HighlightRect descriptor taking values from params + HighlightRect * hr = new HighlightRect(); + hr->s_id = s_id; + hr->color = color; + hr->left = rect->left; + hr->top = rect->top; + hr->right = rect->right; + hr->bottom = rect->bottom; + // append the HighlightRect to the list + m_highlights.append( hr ); + // delete old object and change reference + delete rect; + rect = hr; +} + +void KPDFPage::setTransition( KPDFPageTransition * transition ) +{ + delete m_transition; + m_transition = transition; +} + +void KPDFPage::deletePixmap( int id ) +{ + if ( m_pixmaps.contains( id ) ) + { + delete m_pixmaps[ id ]; + m_pixmaps.remove( id ); + } +} + +void KPDFPage::deletePixmapsAndRects() +{ + // delete all stored pixmaps + QMap<int,QPixmap *>::iterator it = m_pixmaps.begin(), end = m_pixmaps.end(); + for ( ; it != end; ++it ) + delete *it; + m_pixmaps.clear(); + // delete ObjectRects + QValueList< ObjectRect * >::iterator rIt = m_rects.begin(), rEnd = m_rects.end(); + for ( ; rIt != rEnd; ++rIt ) + delete *rIt; + m_rects.clear(); +} + +void KPDFPage::deleteHighlights( int s_id ) +{ + // delete highlights by ID + QValueList< HighlightRect * >::iterator it = m_highlights.begin(), end = m_highlights.end(); + while ( it != end ) + { + HighlightRect * highlight = *it; + if ( s_id == -1 || highlight->s_id == s_id ) + { + it = m_highlights.remove( it ); + delete highlight; + } + else + ++it; + } +} + + +/** class NormalizedRect **/ + +NormalizedRect::NormalizedRect() + : left( 0.0 ), top( 0.0 ), right( 0.0 ), bottom( 0.0 ) {} + +NormalizedRect::NormalizedRect( double l, double t, double r, double b ) + // note: check for swapping coords? + : left( l ), top( t ), right( r ), bottom( b ) {} + +NormalizedRect::NormalizedRect( const QRect & r, double xScale, double yScale ) + : left( (double)r.left() / xScale ), top( (double)r.top() / yScale ), + right( (double)r.right() / xScale ), bottom( (double)r.bottom() / yScale ) {} + +bool NormalizedRect::contains( double x, double y ) const +{ + return x >= left && x <= right && y >= top && y <= bottom; +} + +bool NormalizedRect::intersects( const NormalizedRect & r ) const +{ + return (r.left < right) && (r.right > left) && (r.top < bottom) && (r.bottom > top); +} + +bool NormalizedRect::intersects( double l, double t, double r, double b ) const +{ + return (l < right) && (r > left) && (t < bottom) && (b > top); +} + +QRect NormalizedRect::geometry( int xScale, int yScale ) const +{ + int l = (int)( left * xScale ), + t = (int)( top * yScale ), + r = (int)( right * xScale ), + b = (int)( bottom * yScale ); + return QRect( l, t, r - l + 1, b - t + 1 ); +} + + +/** class ObjectRect **/ + +ObjectRect::ObjectRect( double l, double t, double r, double b, ObjectType type, void * pnt ) + // assign coordinates swapping them if negative width or height + : NormalizedRect( r > l ? l : r, b > t ? t : b, r > l ? r : l, b > t ? b : t ), + m_objectType( type ), m_pointer( pnt ) +{ +} + +ObjectRect::~ObjectRect() +{ + if ( !m_pointer ) + return; + + if ( m_objectType == Link ) + delete static_cast<KPDFLink*>( m_pointer ); + else + kdDebug() << "Object deletion not implemented for type '" << m_objectType << "' ." << endl; +} |