Finishing of outline, zoom actions

PdfForQtLib/PdfForQtLib.pro

@@ -202,6 +202,8 @@ SUFFIX = d
 
 qt_libraries.files =    $$[QT_INSTALL_BINS]/Qt?Widgets$${SUFFIX}.dll \
                         $$[QT_INSTALL_BINS]/Qt?Gui$${SUFFIX}.dll \
-                        $$[QT_INSTALL_BINS]/Qt?Core$${SUFFIX}.dll
+                        $$[QT_INSTALL_BINS]/Qt?Core$${SUFFIX}.dll \
+                        $$[QT_INSTALL_BINS]/Qt?WinExtras$${SUFFIX}.dll \
+                        $$[QT_INSTALL_BINS]/Qt?Svg$${SUFFIX}.dll
 qt_libraries.path = $$DESTDIR/install
 INSTALLS += qt_libraries

PdfForQtLib/sources/pdfaction.cpp

@@ -327,7 +327,7 @@ PDFDestination PDFDestination::parse(const PDFDocument* document, PDFObject obje
         const PDFArray* array = object.getArray();
         if (array->getCount() < 2)
         {
-            throw PDFException(PDFTranslationContext::tr("Invalid destination - array has invalid size."));
+            return result;
         }
 
         PDFDocumentDataLoaderDecorator loader(document);
@@ -344,7 +344,7 @@ PDFDestination PDFDestination::parse(const PDFDocument* document, PDFObject obje
         }
         else
         {
-            throw PDFException(PDFTranslationContext::tr("Invalid destination - invalid page reference."));
+            return result;
         }
 
         QByteArray name = loader.readName(array->getItem(1));
@@ -352,11 +352,11 @@ PDFDestination PDFDestination::parse(const PDFDocument* document, PDFObject obje
         size_t currentIndex = 2;
         auto readNumber = [&]()
         {
-            if (currentIndex >= array->getCount())
+            if (currentIndex < array->getCount())
             {
-                throw PDFException(PDFTranslationContext::tr("Invalid destination - array has invalid size."));
+                return loader.readNumber(array->getItem(currentIndex++), 0.0);
             }
-            return loader.readNumber(array->getItem(currentIndex++), 0.0);
+            return 0.0;
         };
 
         if (name == "XYZ")
@@ -404,7 +404,7 @@ PDFDestination PDFDestination::parse(const PDFDocument* document, PDFObject obje
         }
         else
         {
-            throw PDFException(PDFTranslationContext::tr("Invalid destination - unknown type."));
+            return result;
         }
     }
 

PdfForQtLib/sources/pdfaction.h

@@ -86,7 +86,7 @@ public:
     PDFInteger getPageIndex() const { return m_pageIndex; }
 
     /// Parses the destination from the object. If object contains invalid destination,
-    /// then exception is thrown. If object is empty, empty destination is returned.
+    /// then empty destination is returned. If object is empty, empty destination is returned.
     /// \param document Document
     /// \param object Destination object
     static PDFDestination parse(const PDFDocument* document, PDFObject object);

PdfForQtLib/sources/pdfcatalog.cpp

@@ -143,6 +143,7 @@ PDFCatalog PDFCatalog::parse(const PDFObject& catalog, const PDFDocument* docume
             {
                 object = object.getDictionary()->get("D");
             }
+
             return PDFDestination::parse(document, qMove(object));
         };
 

PdfForQtLib/sources/pdfdrawspacecontroller.cpp

@@ -114,6 +114,25 @@ PDFDrawSpaceController::LayoutItem PDFDrawSpaceController::getLayoutItemForPage(
     return result;
 }
 
+QSizeF PDFDrawSpaceController::getReferenceBoundingBox() const
+{
+    QRectF rect;
+
+    for (const LayoutItem& item : m_layoutItems)
+    {
+        QRectF pageRect = item.pageRectMM;
+        pageRect.translate(0, -pageRect.top());
+        rect = rect.united(pageRect);
+    }
+
+    if (rect.isValid())
+    {
+        rect.adjust(0, 0, m_horizontalSpacingMM, m_verticalSpacingMM);
+    }
+
+    return rect.size();
+}
+
 void PDFDrawSpaceController::recalculate()
 {
     if (!m_document)
@@ -697,6 +716,24 @@ void PDFDrawWidgetProxy::performOperation(Operation operation)
             break;
         }
 
+        case ZoomFit:
+        {
+            zoom(getZoomHint(ZoomHint::Fit));
+            break;
+        }
+
+        case ZoomFitWidth:
+        {
+            zoom(getZoomHint(ZoomHint::FitWidth));
+            break;
+        }
+
+        case ZoomFitHeight:
+        {
+            zoom(getZoomHint(ZoomHint::FitHeight));
+            break;
+        }
+
         default:
         {
             Q_ASSERT(false);
@@ -734,6 +771,38 @@ void PDFDrawWidgetProxy::zoom(PDFReal zoom)
     }
 }
 
+PDFReal PDFDrawWidgetProxy::getZoomHint(ZoomHint hint) const
+{
+    QSizeF referenceSize = m_controller->getReferenceBoundingBox();
+    if (referenceSize.isValid())
+    {
+        const PDFReal ratio = 0.95;
+        const PDFReal widthMM = m_widget->widthMM() * ratio;
+        const PDFReal heightMM = m_widget->heightMM() * ratio;
+
+        const PDFReal widthHint = widthMM / referenceSize.width();
+        const PDFReal heightHint = heightMM / referenceSize.height();
+
+        switch (hint)
+        {
+            case ZoomHint::Fit:
+                return qMin(widthHint, heightHint);
+
+            case ZoomHint::FitWidth:
+                return widthHint;
+
+            case ZoomHint::FitHeight:
+                return heightHint;
+
+            default:
+                break;
+        }
+    }
+
+    // Return default 100% zoom
+    return 1.0;
+}
+
 void PDFDrawWidgetProxy::goToPage(PDFInteger pageIndex)
 {
     PDFDrawSpaceController::LayoutItem layoutItem = m_controller->getLayoutItemForPage(pageIndex);

PdfForQtLib/sources/pdfdrawspacecontroller.h

@@ -105,6 +105,11 @@ public:
     /// Returns optional content activity
     const PDFOptionalContentActivity* getOptionalContentActivity() const { return m_optionalContentActivity; }
 
+    /// Returns reference bounding box for correct calculation of zoom fit/fit vertical/fit horizontal.
+    /// If zoom is set in a way to display this bounding box on a screen, then it is assured that
+    /// any page on the screen will fit this bounding box, regardless of mode (single/two columns, etc.).
+    QSizeF getReferenceBoundingBox() const;
+
 signals:
     void drawSpaceChanged();
     void repaintNeeded();
@@ -175,6 +180,9 @@ public:
     {
         ZoomIn,
         ZoomOut,
+        ZoomFit,
+        ZoomFitWidth,
+        ZoomFitHeight,
         NavigateDocumentStart,
         NavigateDocumentEnd,
         NavigateNextPage,
@@ -197,6 +205,18 @@ public:
     /// \param zoom New zoom
     void zoom(PDFReal zoom);
 
+    enum class ZoomHint
+    {
+        Fit,
+        FitWidth,
+        FitHeight
+    };
+
+    /// Calculates zoom using given hint (i.e. to fill whole space, fill vertical,
+    /// or fill horizontal).
+    /// \param hint Zoom hint type
+    PDFReal getZoomHint(ZoomHint hint) const;
+
     /// Go to the specified page
     /// \param pageIndex Page to scroll to
     void goToPage(PDFInteger pageIndex);

PdfForQtLib/sources/pdfdrawwidget.cpp

@@ -176,6 +176,7 @@ template<typename BaseWidget>
 void PDFDrawWidgetBase<BaseWidget>::keyPressEvent(QKeyEvent* event)
 {
     QScrollBar* verticalScrollbar = m_widget->getVerticalScrollbar();
+    event->ignore();
 
     // Vertical navigation
     if (verticalScrollbar->isVisible())
@@ -195,11 +196,10 @@ void PDFDrawWidgetBase<BaseWidget>::keyPressEvent(QKeyEvent* event)
             if (event->matches(keyToOperation.first))
             {
                 m_widget->getDrawWidgetProxy()->performOperation(keyToOperation.second);
+                event->accept();
             }
         }
     }
-
-    event->accept();
 }
 
 template<typename BaseWidget>

PdfForQtViewer/pdfforqtviewer.qrc

@@ -18,5 +18,8 @@
         <file>resources/zoom-out.svg</file>
         <file>resources/bookmark.svg</file>
         <file>resources/security.svg</file>
+        <file>resources/zoom-fit.svg</file>
+        <file>resources/zoom-fit-horizontal.svg</file>
+        <file>resources/zoom-fit-vertical.svg</file>
     </qresource>
 </RCC>

PdfForQtViewer/pdfviewermainwindow.cpp

@@ -138,6 +138,11 @@ PDFViewerMainWindow::PDFViewerMainWindow(QWidget *parent) :
     connect(m_pageZoomSpinBox, &QDoubleSpinBox::editingFinished, this, &PDFViewerMainWindow::onPageZoomSpinboxEditingFinished);
     ui->mainToolBar->addWidget(m_pageZoomSpinBox);
 
+    // Fit page, width, height
+    ui->mainToolBar->addAction(ui->actionFitPage);
+    ui->mainToolBar->addAction(ui->actionFitWidth);
+    ui->mainToolBar->addAction(ui->actionFitHeight);
+
     connect(ui->actionZoom_In, &QAction::triggered, this, [this] { m_pdfWidget->getDrawWidgetProxy()->performOperation(pdf::PDFDrawWidgetProxy::ZoomIn); });
     connect(ui->actionZoom_Out, &QAction::triggered, this, [this] { m_pdfWidget->getDrawWidgetProxy()->performOperation(pdf::PDFDrawWidgetProxy::ZoomOut); });
 
@@ -286,6 +291,24 @@ void PDFViewerMainWindow::onActionTriggered(const pdf::PDFAction* action)
                     if (pageIndex != pdf::PDFCatalog::INVALID_PAGE_INDEX)
                     {
                         m_pdfWidget->getDrawWidgetProxy()->goToPage(pageIndex);
+
+                        switch (destination.getDestinationType())
+                        {
+                            case pdf::DestinationType::Fit:
+                                m_pdfWidget->getDrawWidgetProxy()->performOperation(pdf::PDFDrawWidgetProxy::ZoomFit);
+                                break;
+
+                            case pdf::DestinationType::FitH:
+                                m_pdfWidget->getDrawWidgetProxy()->performOperation(pdf::PDFDrawWidgetProxy::ZoomFitWidth);
+                                break;
+
+                            case pdf::DestinationType::FitV:
+                                m_pdfWidget->getDrawWidgetProxy()->performOperation(pdf::PDFDrawWidgetProxy::ZoomFitHeight);
+                                break;
+
+                            default:
+                                break;
+                        }
                     }
                 }
 
@@ -799,6 +822,21 @@ void PDFViewerMainWindow::on_actionFirstPageOnRightSide_triggered()
     }
 }
 
+void PDFViewerMainWindow::on_actionFitPage_triggered()
+{
+    m_pdfWidget->getDrawWidgetProxy()->performOperation(pdf::PDFDrawWidgetProxy::ZoomFit);
+}
+
+void PDFViewerMainWindow::on_actionFitWidth_triggered()
+{
+    m_pdfWidget->getDrawWidgetProxy()->performOperation(pdf::PDFDrawWidgetProxy::ZoomFitWidth);
+}
+
+void PDFViewerMainWindow::on_actionFitHeight_triggered()
+{
+    m_pdfWidget->getDrawWidgetProxy()->performOperation(pdf::PDFDrawWidgetProxy::ZoomFitHeight);
+}
+
 void PDFViewerMainWindow::on_actionRendering_Errors_triggered()
 {
     pdf::PDFRenderingErrorsWidget renderingErrorsDialog(this, m_pdfWidget);
@@ -821,4 +859,3 @@ void PDFViewerMainWindow::on_actionAbout_triggered()
 }
 
 }   // namespace pdfviewer
-

PdfForQtViewer/pdfviewermainwindow.h

@@ -74,6 +74,12 @@ private slots:
 
     void on_actionAbout_triggered();
 
+    void on_actionFitPage_triggered();
+
+    void on_actionFitWidth_triggered();
+
+    void on_actionFitHeight_triggered();
+
 private:
     void onActionOpenTriggered();
     void onActionCloseTriggered();

PdfForQtViewer/pdfviewermainwindow.ui

@@ -65,6 +65,10 @@
     <addaction name="separator"/>
     <addaction name="actionZoom_In"/>
     <addaction name="actionZoom_Out"/>
+    <addaction name="separator"/>
+    <addaction name="actionFitPage"/>
+    <addaction name="actionFitWidth"/>
+    <addaction name="actionFitHeight"/>
    </widget>
    <widget class="QMenu" name="menuTools">
     <property name="title">
@@ -256,6 +260,39 @@
     <string>About</string>
    </property>
   </action>
+  <action name="actionFitPage">
+   <property name="icon">
+    <iconset resource="pdfforqtviewer.qrc">
+     <normaloff>:/resources/zoom-fit.svg</normaloff>:/resources/zoom-fit.svg</iconset>
+   </property>
+   <property name="text">
+    <string>Fit Page</string>
+   </property>
+  </action>
+  <action name="actionFitWidth">
+   <property name="icon">
+    <iconset resource="pdfforqtviewer.qrc">
+     <normaloff>:/resources/zoom-fit-horizontal.svg</normaloff>:/resources/zoom-fit-horizontal.svg</iconset>
+   </property>
+   <property name="text">
+    <string>Fit Width</string>
+   </property>
+   <property name="shortcut">
+    <string>W</string>
+   </property>
+  </action>
+  <action name="actionFitHeight">
+   <property name="icon">
+    <iconset resource="pdfforqtviewer.qrc">
+     <normaloff>:/resources/zoom-fit-vertical.svg</normaloff>:/resources/zoom-fit-vertical.svg</iconset>
+   </property>
+   <property name="text">
+    <string>Fit Height</string>
+   </property>
+   <property name="shortcut">
+    <string>H</string>
+   </property>
+  </action>
  </widget>
  <layoutdefault spacing="6" margin="11"/>
  <resources>

PdfForQtViewer/resources/zoom-fit-horizontal.svg

@@ -0,0 +1,196 @@
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+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
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+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
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+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="30mm"
+   height="30mm"
+   viewBox="0 0 30 30"
+   version="1.1"
+   id="svg5291"
+   inkscape:version="0.92.4 (5da689c313, 2019-01-14)"
+   sodipodi:docname="zoom-fit-horizontal.svg">
+  <defs
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+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0.0"
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+      <path
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PdfForQtViewer/resources/zoom-fit-vertical.svg

@@ -0,0 +1,193 @@
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+
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+   viewBox="0 0 30 30"
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