Add an interface (implemented by the Part) for controlling the really basic document viewer functionalities. This (along with a small refactor in the okular shell) gives the user the possibility to start okular with:

-p, --page <page> : to select the startup page
      --presentation : to start directly in presentation mode
implementing also KPDF wishes #134115 and #137905.

svn path=/trunk/playground/graphics/okular/; revision=619681

kdocumentviewer.h

@@ -0,0 +1,43 @@
+/***************************************************************************
+ *   Copyright (C) 2007 by Pino Toscano <pino@kde.org>                     *
+ *                                                                         *
+ *   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.                                   *
+ ***************************************************************************/
+
+#ifndef _KDOCUMENTVIEWER_H_
+#define _KDOCUMENTVIEWER_H_
+
+class KUrl;
+
+/**
+ * @short Abstract interface for a document viewer
+ *
+ * This interface describe briefly the basic functions of a document viewer.
+ */
+class KDocumentViewer
+{
+    public:
+        virtual ~KDocumentViewer() {}
+
+        /**
+         * Open the document at the specified @p url at page @p page.
+         */
+        virtual bool openDocument( const KUrl& url, uint page ) = 0;
+
+        /**
+         * Change to @p page the currently shown page.
+         */
+        virtual void goToPage( uint page ) = 0;
+
+        /**
+         * Start the presentation mode.
+         */
+        virtual void startPresentation() = 0;
+};
+
+Q_DECLARE_INTERFACE( KDocumentViewer, "org.kde.kdocumentviewer/0.1" )
+
+#endif

part.cpp

@@ -82,7 +82,7 @@ Part::Part(QWidget *parentWidget,
            const QStringList & /*args*/ )
 	: KParts::ReadOnlyPart(parent), 
 	m_showMenuBarAction(0), m_showFullScreenAction(0), m_actionsSearched(false),
-	m_searchStarted(false)
+	m_searchStarted(false), m_cliPresentation(false)
 {
 	QDBusConnection::sessionBus().registerObject("/okular", this, QDBusConnection::ExportScriptableSlots);
 
@@ -390,6 +390,19 @@ Part::~Part()
         delete *it;
 }
 
+bool Part::openDocument(const KUrl& url, uint page)
+{
+    Okular::DocumentViewport vp( page - 1 );
+    if ( vp.isValid() )
+        m_document->setNextDocumentViewport( vp );
+    return openUrl( url );
+}
+
+void Part::startPresentation()
+{
+    m_cliPresentation = true;
+}
+
 void Part::openUrlFromDocument(const KUrl &url)
 {
     m_bExtension->openUrlNotify();
@@ -648,11 +661,14 @@ bool Part::openFile()
     {
         m_toolBox->setCurrentIndex( 0 );
     }
-    // if the 'StartFullScreen' flag is set, start presentation
-    if ( m_document->metaData( "StartFullScreen" ).toBool() )
+    // if the 'StartFullScreen' flag is set, or the command line flag was
+    // specified, start presentation
+    if ( m_document->metaData( "StartFullScreen" ).toBool() || m_cliPresentation )
     {
-        KMessageBox::information( m_presentationWidget, i18n("The document is going to be launched on presentation mode because the file requested it."), QString::null, "autoPresentationWarning" );
-        slotShowPresentation();
+        if ( !m_cliPresentation )
+            KMessageBox::information( m_presentationWidget, i18n("The document is going to be launched on presentation mode because the file requested it."), QString::null, "autoPresentationWarning" );
+        m_cliPresentation = false;
+        QMetaObject::invokeMethod(this, "slotShowPresentation", Qt::QueuedConnection);
     }
 /*    if (m_document->getXMLFile() != QString::null)
         setXMLFile(m_document->getXMLFile(),true);*/

part.h

@@ -22,6 +22,7 @@
 #include <qpointer.h>
 #include "core/observer.h"
 #include "core/document.h"
+#include "kdocumentviewer.h"
 
 #include <QtDBus/QtDBus>
 
@@ -66,10 +67,11 @@ class BrowserExtension;
  * @author Wilco Greven <greven@kde.org>
  * @version 0.2
  */
-class Part : public KParts::ReadOnlyPart, public Okular::DocumentObserver
+class Part : public KParts::ReadOnlyPart, public Okular::DocumentObserver, public KDocumentViewer
 {
 Q_OBJECT
 Q_CLASSINFO("D-Bus Interface", "org.kde.okular")
+Q_INTERFACES(KDocumentViewer)
 
 public:
 	// Default constructor
@@ -84,6 +86,9 @@ public:
 
 	static KAboutData* createAboutData();
 
+	bool openDocument(const KUrl& url, uint page);
+	void startPresentation();
+
 public slots: // dbus
 	Q_SCRIPTABLE Q_NOREPLY void goToPage(uint page);
 	Q_SCRIPTABLE Q_NOREPLY void openDocument(KUrl doc);
@@ -212,6 +217,7 @@ private:
   QStringList m_supportedMimeTypes;
   KSelectAction * m_confGens;
 	QList<Okular::ExportFormat> m_exportFormats;
+	bool m_cliPresentation;
 
 private slots:
     void slotGeneratorPreferences();

shell/CMakeLists.txt

@@ -1,4 +1,8 @@
 
+include_directories(
+  ${CMAKE_CURRENT_SOURCE_DIR}/..
+)
+
 ########### next target ###############
 
 set(okular_SRCS main.cpp shell.cpp )

shell/main.cpp

@@ -25,6 +25,9 @@ static const char version[] = "0.5.81";
 
 static KCmdLineOptions options[] =
 {
+    { "p", 0, 0 },
+    { "page <number>", I18N_NOOP("Page of the document to be shown"), 0 },
+    { "presentation", I18N_NOOP("Start the document in presentation mode"), 0 },
     { "+[URL]", I18N_NOOP("Document to open"), 0 },
     KCmdLineLastOption
 };
@@ -63,18 +66,17 @@ int main(int argc, char** argv)
 
         if (args->count() == 0)
         {
-            Shell* widget = new Shell;
+            Shell* widget = new Shell(args);
             widget->show();
         }
         else
         {
             for (int i = 0; i < args->count(); ++i)
             {
-                Shell* widget = new Shell(args->url(i));
+                Shell* widget = new Shell(args, args->url(i));
                 widget->show();
             }
         }
-        args->clear();
     }
 
     return app.exec();

shell/shell.cpp

@@ -22,6 +22,7 @@
 #include <qtimer.h>
 #include <kaction.h>
 #include <kapplication.h>
+#include <kcmdlineargs.h>
 #include <kedittoolbar.h>
 #include <kfiledialog.h>
 #include <klibloader.h>
@@ -44,15 +45,10 @@
 
 // local includes
 #include "shell.h"
+#include "kdocumentviewer.h"
 
-Shell::Shell()
-  : KParts::MainWindow(), m_menuBarWasShown(true), m_toolBarWasShown(true)
-{
-  init();
-}
-
-Shell::Shell(const KUrl &url)
-  : KParts::MainWindow(), m_menuBarWasShown(true), m_toolBarWasShown(true)
+Shell::Shell(KCmdLineArgs* args, const KUrl &url)
+  : KParts::MainWindow(), m_args(args), m_menuBarWasShown(true), m_toolBarWasShown(true)
 {
   m_openUrl = url;
   init();
@@ -63,6 +59,7 @@ void Shell::init()
   setObjectName( QLatin1String( "okular::Shell" ) );
   // set the shell's ui resource file
   setXMLFile("shell.rc");
+  m_doc=0L;
   m_fileformats=0L;
   m_tempfile=0L;
   // this routine will find and load our Part.  it finds the Part by
@@ -84,6 +81,7 @@ void Shell::init()
       setupGUI(Keys | Save);
       createGUI(m_part);
       m_showToolBarAction = static_cast<KToggleAction*>(toolBarMenuAction());
+      m_doc = qobject_cast<KDocumentViewer*>(m_part);
     }
   }
   else
@@ -112,7 +110,13 @@ void Shell::init()
 
 void Shell::delayedOpen()
 {
-   openUrl(m_openUrl);
+   uint page = 0;
+   if (m_args && m_doc)
+   {
+       QByteArray pageopt = m_args->getOption("page");
+       page = pageopt.toUInt();
+   }
+   openUrl(m_openUrl, page);
 }
 
 Shell::~Shell()
@@ -123,11 +127,13 @@ Shell::~Shell()
     delete m_part;
 }
 
-void Shell::openUrl( const KUrl & url )
+void Shell::openUrl( const KUrl & url, uint page )
 {
     if ( m_part )
     {
-        bool openOk = m_part->openUrl( url );
+        if ( m_doc && m_args && m_args->isSet( "presentation" ) )
+            m_doc->startPresentation();
+        bool openOk = page > 0 && m_doc ? m_doc->openDocument( url, page ) : m_part->openUrl( url );
         if ( openOk ) m_recent->addUrl( url );
         else m_recent->removeUrl( url );
     }

shell/shell.h

@@ -23,10 +23,12 @@
 #include <kparts/mainwindow.h>
 #include <kmimetype.h>
 
+class KCmdLineArgs;
 class KRecentFilesAction;
 class KTemporaryFile;
 class KToggleAction;
 
+class KDocumentViewer;
 class Part;
 
 /**
@@ -43,14 +45,9 @@ class Shell : public KParts::MainWindow
 
 public:
   /**
-   * Default Constructor
+   * Constructor
    */
-  Shell();
-
-  /**
-   * Open an url
-   */
-  Shell(const KUrl &url);
+  Shell(KCmdLineArgs* args = 0, const KUrl &url = KUrl());
 
   /**
    * Default Destructor
@@ -84,7 +81,7 @@ private slots:
   void slotUpdateFullScreen();
   void slotShowMenubar();
 
-  void openUrl( const KUrl & url );
+  void openUrl( const KUrl & url, uint page = 0 );
   void delayedOpen();
 
 signals:
@@ -99,7 +96,9 @@ private:
   QStringList* fileFormats();
 
 private:
+  KCmdLineArgs* m_args;
   KParts::ReadOnlyPart* m_part;
+  KDocumentViewer* m_doc;
   KTemporaryFile* m_tempfile;
   KRecentFilesAction* m_recent;
   QStringList* m_fileformats;