From d3b0b62cfc6dce9ea0bc27363935bc5adb7cac41 Mon Sep 17 00:00:00 2001
From: Pino Toscano <pino@kde.org>
Date: Mon, 22 Sep 2008 13:41:28 +0000
Subject: [PATCH] Make Okular able to distinguish the LilyPond "Point and
 click" links, and make them act as source references when activated.

FEATURE: 163569

svn path=/trunk/KDE/kdegraphics/okular/; revision=863572
---
 core/action.cpp          |  7 +++++++
 core/document.cpp        |  8 ++++++++
 core/sourcereference.cpp | 38 +++++++++++++++++++++++++++++++++++++-
 core/sourcereference_p.h | 23 +++++++++++++++++++++++
 4 files changed, 75 insertions(+), 1 deletion(-)
 create mode 100644 core/sourcereference_p.h

diff --git a/core/action.cpp b/core/action.cpp
index c672a3ec5..df665b9f8 100644
--- a/core/action.cpp
+++ b/core/action.cpp
@@ -14,6 +14,7 @@
 
 // local includes
 #include "document.h"
+#include "sourcereference_p.h"
 #include "sound.h"
 
 using namespace Okular;
@@ -174,6 +175,12 @@ Action::ActionType BrowseAction::actionType() const
 QString BrowseAction::actionTip() const
 {
     Q_D( const Okular::BrowseAction );
+    QString source;
+    int row = 0, col = 0;
+    if ( extractLilyPondSourceReference( d->m_url, &source, &row, &col ) )
+    {
+        return sourceReferenceToolTip( source, row, col );
+    }
     return d->m_url;
 }
 
diff --git a/core/document.cpp b/core/document.cpp
index be8db8f28..40e8ff8d3 100644
--- a/core/document.cpp
+++ b/core/document.cpp
@@ -65,6 +65,7 @@
 #include "scripter.h"
 #include "settings.h"
 #include "sourcereference.h"
+#include "sourcereference_p.h"
 #include "view.h"
 #include "view_p.h"
 
@@ -2740,9 +2741,16 @@ void Document::processAction( const Action * action )
 
         case Action::Browse: {
             const BrowseAction * browse = static_cast< const BrowseAction * >( action );
+            QString lilySource;
+            int lilyRow = 0, lilyCol = 0;
             // if the url is a mailto one, invoke mailer
             if ( browse->url().startsWith( "mailto:", Qt::CaseInsensitive ) )
                 KToolInvocation::invokeMailer( browse->url() );
+            else if ( extractLilyPondSourceReference( browse->url(), &lilySource, &lilyRow, &lilyCol ) )
+            {
+                const SourceReference ref( lilySource, lilyRow, lilyCol );
+                processSourceReference( &ref );
+            }
             else
             {
                 QString url = browse->url();
diff --git a/core/sourcereference.cpp b/core/sourcereference.cpp
index d19f0804b..7090b83fe 100644
--- a/core/sourcereference.cpp
+++ b/core/sourcereference.cpp
@@ -1,5 +1,5 @@
 /***************************************************************************
- *   Copyright (C) 2007 by Pino Toscano <pino@kde.org>                     *
+ *   Copyright (C) 2007,2008 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  *
@@ -8,8 +8,10 @@
  ***************************************************************************/
 
 #include "sourcereference.h"
+#include "sourcereference_p.h"
 
 #include <QtCore/QString>
+#include <klocale.h>
 
 using namespace Okular;
 
@@ -54,3 +56,37 @@ int SourceReference::column() const
     return d->column;
 }
 
+bool Okular::extractLilyPondSourceReference( const QString &url, QString *file, int *row, int *col )
+{
+    if ( !url.startsWith( QLatin1String( "textedit://" ) ) )
+        return false;
+
+    *row = 0;
+    *col = 0;
+    int lilyChar = 0;
+    typedef int *IntPtr;
+    const IntPtr int_data[] = { row, &lilyChar, col };
+    int int_index = sizeof( int_data ) / sizeof( int* ) - 1;
+    int index_last = -1;
+    int index = url.lastIndexOf( QLatin1Char( ':' ), index_last );
+    while ( index != -1 && int_index >= 0 )
+    {
+        // read the current "chunk"
+        const QStringRef ref = url.midRef( index + 1, index_last - index - 1 );
+        *int_data[ int_index ] = QString::fromRawData( ref.data(), ref.count() ).toInt();
+        // find the previous "chunk"
+        index_last = index;
+        index = url.lastIndexOf( QLatin1Char( ':' ), index_last - 1 );
+        --int_index;
+    }
+    // NOTE: 11 is the length of "textedit://"
+    *file = url.mid( 11, index_last != -1 ? index_last - 11 : -1 );
+    return true;
+}
+
+QString Okular::sourceReferenceToolTip( const QString &source, int row, int col )
+{
+    Q_UNUSED( row );
+    Q_UNUSED( col );
+    return i18nc( "'source' is a source file", "Source: %1", source );
+}
diff --git a/core/sourcereference_p.h b/core/sourcereference_p.h
new file mode 100644
index 000000000..cf7b3e826
--- /dev/null
+++ b/core/sourcereference_p.h
@@ -0,0 +1,23 @@
+/***************************************************************************
+ *   Copyright (C) 2008 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 OKULAR_SOURCEREFERENCE_P_H
+#define OKULAR_SOURCEREFERENCE_P_H
+
+class QString;
+
+namespace Okular
+{
+
+bool extractLilyPondSourceReference( const QString &url, QString *file, int *row, int *col );
+QString sourceReferenceToolTip( const QString &source, int row, int col );
+
+}
+
+#endif