From 2d64d446d7ec51b59ff3d7aa73a7b68d3e69ca1f Mon Sep 17 00:00:00 2001
From: Pino Toscano <pino@kde.org>
Date: Thu, 13 Jul 2006 16:08:50 +0000
Subject: [PATCH] Read correctly the 'poly' links for DjVu documents.

svn path=/trunk/playground/graphics/okular/; revision=561918
---
 generators/djvu/generator_djvu.cpp | 26 +++++++++++++++++++++++++-
 generators/djvu/kdjvu.cpp          | 17 +++++++++++++++--
 generators/djvu/kdjvu.h            |  6 +++---
 3 files changed, 43 insertions(+), 6 deletions(-)

diff --git a/generators/djvu/generator_djvu.cpp b/generators/djvu/generator_djvu.cpp
index 3fa22e580..9ddac8b7b 100644
--- a/generators/djvu/generator_djvu.cpp
+++ b/generators/djvu/generator_djvu.cpp
@@ -194,7 +194,8 @@ void DjVuGenerator::djvuPixmapGenerated( int page, const QPixmap & pix )
                 const KDjVu::Page* p = m_djvu->pages().at( newpage == -1 ? page : newpage );
                 int width = p->width();
                 int height = p->height();
-                if ( m_request->documentRotation % 2 == 1 )
+                bool scape_orientation = ( m_request->documentRotation % 2 == 1 );
+                if ( scape_orientation )
                     qSwap( width, height );
                 ObjectRect *newrect = 0;
                 switch ( curlink->areaType() )
@@ -207,6 +208,29 @@ void DjVuGenerator::djvuPixmapGenerated( int page, const QPixmap & pix )
                         newrect = new ObjectRect( NormalizedRect( okularUtils::rotateRect( r, width, height, m_request->documentRotation ), width, height ), ellipse, ObjectRect::Link, newlink );
                         break;
                     }
+                    case KDjVu::Link::PolygonArea:
+                    {
+                        QPolygon poly = curlink->polygon();
+                        QPolygonF newpoly;
+                        for ( int i = 0; i < poly.count(); ++i )
+                        {
+                            int x = poly.at(i).x();
+                            int y = poly.at(i).y();
+                            if ( scape_orientation )
+                                qSwap( x, y );
+                            else
+                            {
+                                y = height - y;
+                            }
+                            newpoly << QPointF( (double)(x)/width, (double)(y)/height );
+                        }
+                        if ( !newpoly.isEmpty() )
+                        {
+                            newpoly << newpoly.first();
+                            newrect = new ObjectRect( newpoly, ObjectRect::Link, newlink );
+                        }
+                        break;
+                    }
                     default: ;
                 }
                 if ( newrect )
diff --git a/generators/djvu/kdjvu.cpp b/generators/djvu/kdjvu.cpp
index 1ea80774e..0055e45f7 100644
--- a/generators/djvu/kdjvu.cpp
+++ b/generators/djvu/kdjvu.cpp
@@ -159,7 +159,7 @@ QSize KDjVu::Link::size() const
     return m_size;
 }
 
-QPolygonF KDjVu::Link::polygon() const
+QPolygon KDjVu::Link::polygon() const
 {
     return m_poly;
 }
@@ -498,6 +498,7 @@ QList<KDjVu::Link*> KDjVu::linksForPage( int pageNum ) const
         }
         if ( link )
         {
+            link->m_area = KDjVu::Link::UnknownArea;
             miniexp_t area = miniexp_nth( 3, cur );
             int arealength = miniexp_length( area );
             if ( ( arealength == 5 ) && miniexp_symbolp( miniexp_nth( 0, area ) ) &&
@@ -515,9 +516,21 @@ QList<KDjVu::Link*> KDjVu::linksForPage( int pageNum ) const
                     link->m_area = KDjVu::Link::EllipseArea;
                 }
             }
+            else if ( ( arealength > 0 ) && ( arealength % 2 == 1 ) &&
+                      miniexp_symbolp( miniexp_nth( 0, area ) ) &&
+                      ( qstrncmp( miniexp_to_name( miniexp_nth( 0, area ) ), "poly", 4 ) == 0 ) )
+            {
+                link->m_area = KDjVu::Link::PolygonArea;
+                QPolygon poly;
+                for ( int j = 1; j < arealength; j += 2 ) 
+                {
+                    poly << QPoint( miniexp_to_int( miniexp_nth( j, area ) ), miniexp_to_int( miniexp_nth( j + 1, area ) ) );
+                }
+                link->m_poly = poly;
+            }
             // TODO: other link shapes
 
-            if ( !( link->m_point.isNull() || link->m_size.isNull() ) )
+            if ( link->m_area != KDjVu::Link::UnknownArea )
                 ret.append( link );
         }
     }
diff --git a/generators/djvu/kdjvu.h b/generators/djvu/kdjvu.h
index 457302d5a..31ffe3a1e 100644
--- a/generators/djvu/kdjvu.h
+++ b/generators/djvu/kdjvu.h
@@ -63,18 +63,18 @@ class KDjVu : public QObject
                 virtual ~Link();
 
                 enum LinkType { PageLink, UrlLink };
-                enum LinkArea { RectArea, EllipseArea, PolygonArea };
+                enum LinkArea { UnknownArea, RectArea, EllipseArea, PolygonArea };
                 virtual int type() const = 0;
                 LinkArea areaType() const;
                 QPoint point() const;
                 QSize size() const;
-                QPolygonF polygon() const;
+                QPolygon polygon() const;
 
             private:
                 LinkArea m_area;
                 QPoint m_point;
                 QSize m_size;
-                QPolygonF m_poly;
+                QPolygon m_poly;
         };
 
         /**