okular/core/page.cpp

/***************************************************************************
 *   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_attributes( 0 ),
    m_width( w ), m_height( h ), m_sLeft( 0 ), m_sTop( 0 ),
    m_sRight( 0 ), m_sBottom( 0 ), 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();
    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::hasRect( int mouseX, int mouseY ) const
{
    if ( m_rects.count() < 1 )
        return false;
    QValueList< KPDFPageRect * >::const_iterator it = m_rects.begin(), end = m_rects.end();
    for ( ; it != end; ++it )
        if ( (*it)->contains( mouseX, mouseY ) )
            return true;
    return false;
}

bool KPDFPage::hasLink( int mouseX, int mouseY ) const
{
    const KPDFPageRect *r;
    r = getRect( mouseX, mouseY);
    return r && r->pointerType() == KPDFPageRect::Link;
}

const KPDFPageRect * KPDFPage::getRect( int mouseX, int mouseY ) const
{
    QValueList< KPDFPageRect * >::const_iterator it = m_rects.begin(), end = m_rects.end();
    for ( ; it != end; ++it )
        if ( (*it)->contains( mouseX, mouseY ) )
            return *it;
    return 0;
}

const KPDFPageTransition * KPDFPage::getTransition() const
{
    return m_transition;
}

const QPoint KPDFPage::getLastSearchCenter() const
{
    int centerX = (int)((m_sRight + m_sLeft) / 2),
        centerY = (int)((m_sTop + m_sBottom) / 2);
    return QPoint( centerX, centerY );
}

const QString KPDFPage::getTextInRect( const QRect & rect, double zoom ) const
{
    if ( !m_text )
        return QString::null;
    int left = (int)((double)rect.left() / zoom),
        top = (int)((double)rect.top() / zoom),
        right = (int)((double)rect.right() / zoom),
        bottom = (int)((double)rect.bottom() / zoom);
    GString * text = m_text->getText( left, top, right, bottom );
    QString result = QString::fromUtf8( text->getCString() );
    delete text;
    return result; 
}


bool KPDFPage::hasText( const QString & text, bool strictCase, bool fromTop )
{
    if ( !m_text )
        return false;

    const QChar* str = text.unicode();
    int len = text.length();
    Unicode *u = (Unicode *)gmalloc(len * sizeof(Unicode));
    for (int i = 0; i < len; ++i)
        u[i] = str[i].unicode();

    bool found = false;
    while ( !found )
    {
        found = m_text->findText( u, len, fromTop ? gTrue : gFalse, gTrue, fromTop ? gFalse : gTrue, gFalse, &m_sLeft, &m_sTop, &m_sRight, &m_sBottom );
        if ( !found )
            break;
        if( strictCase )
        {
            // since we're in 'Case sensitive' mode, check if words are identical
            GString * orig = m_text->getText( m_sLeft, m_sTop, m_sRight, m_sBottom );
            found = QString::fromUtf8( orig->getCString() ) == text;
            if ( !found && fromTop )
                fromTop = false;
        }
    }
    gfree(u);
    return found;
}

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::setRects( const QValueList< KPDFPageRect * > rects )
{
    QValueList< KPDFPageRect * >::iterator it = m_rects.begin(), end = m_rects.end();
    for ( ; it != end; ++it )
        delete *it;
    m_rects = rects;
}

void KPDFPage::setTransition( const 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 PageRects
    QValueList< KPDFPageRect * >::iterator rIt = m_rects.begin(), rEnd = m_rects.end();
    for ( ; rIt != rEnd; ++rIt )
        delete *rIt;
    m_rects.clear();
}


/** class KPDFPageRect **/

KPDFPageRect::KPDFPageRect( int l, int t, int r, int b )
    : m_pointerType( NoPointer ), m_pointer( 0 )
{
    // assign coordinates swapping them if negative width or height
    m_xMin = r > l ? l : r;
    m_xMax = r > l ? r : l;
    m_yMin = b > t ? t : b;
    m_yMax = b > t ? b : t;
}

KPDFPageRect::~KPDFPageRect()
{
    deletePointer();
}

bool KPDFPageRect::contains( int x, int y ) const
{
    return (x > m_xMin) && (x < m_xMax) && (y > m_yMin) && (y < m_yMax);
}

QRect KPDFPageRect::geometry() const
{
    return QRect( m_xMin, m_yMin, m_xMax - m_xMin, m_yMax - m_yMin );
}

void KPDFPageRect::setPointer( void * object, enum PointerType pType )
{
    deletePointer();
    m_pointer = object;
    m_pointerType = pType;
}

KPDFPageRect::PointerType KPDFPageRect::pointerType() const
{
    return m_pointerType;
}

const void * KPDFPageRect::pointer() const
{
    return m_pointer;
}

void KPDFPageRect::deletePointer()
{
    if ( !m_pointer )
        return;

    if ( m_pointerType == Link )
        delete static_cast<KPDFLink*>( m_pointer );
    else
        kdDebug() << "Object deletion not implemented for type '"
                  << m_pointerType << "' ." << endl;
}