Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.

BUG:215923


git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdevelop@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 348 insertions, 0 deletions

diff --git a/parts/diff/diffwidget.cpp b/parts/diff/diffwidget.cpp
new file mode 100644
index 00000000..0b3399ab
--- /dev/null
+++ b/parts/diff/diffwidget.cpp
@@ -0,0 +1,348 @@
+/***************************************************************************
+ *   Copyright (C) 2001 by Harald Fernengel                                *
+ *   harry@kdevelop.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.                                   *
+ *                                                                         *
+ ***************************************************************************/
+
+#include <qlayout.h>
+#include <qtextedit.h>
+#include <qpopupmenu.h>
+#include <qcursor.h>
+#include <qfile.h>
+
+#include <kconfig.h>
+#include <kapplication.h>
+#include <klocale.h>
+#include <kservice.h>
+#include <ktempfile.h>
+#include <kpopupmenu.h>
+#include <kiconloader.h>
+#include <kfiledialog.h>
+#include <kmessagebox.h>
+
+#include <kparts/componentfactory.h>
+#include <kparts/part.h>
+
+#include <kio/jobclasses.h>
+#include <kio/job.h>
+
+#include <kdevmainwindow.h>
+
+#include "diffpart.h"
+#include "diffwidget.h"
+
+// yup, magic value for the popupmenu-id
+static const int POPUP_BASE = 130977;
+
+QStringList KDiffTextEdit::extParts;
+QStringList KDiffTextEdit::extPartsTranslated;
+
+KDiffTextEdit::KDiffTextEdit( QWidget* parent, const char* name ): QTextEdit( parent, name )
+{
+  KConfig* config = kapp->config();
+  config->setGroup( "Diff" );
+  _highlight = config->readBoolEntry( "Highlight", true );
+
+  searchExtParts();
+}
+
+KDiffTextEdit::~KDiffTextEdit()
+{
+  KConfig* config = kapp->config();
+
+  config->setGroup( "Diff" );
+  config->writeEntry( "Highlight", _highlight );
+}
+
+QPopupMenu* KDiffTextEdit::createPopupMenu()
+{
+  return createPopupMenu( QPoint() );
+}
+
+QPopupMenu* KDiffTextEdit::createPopupMenu( const QPoint& p )
+{
+  QPopupMenu* popup = QTextEdit::createPopupMenu( p );
+  if ( !popup )
+    popup = new QPopupMenu( this );
+
+  int i = 0;
+
+  for ( QStringList::Iterator it = extPartsTranslated.begin(); it != extPartsTranslated.end(); ++it ) {
+    popup->insertItem( i18n( "Show in %1" ).arg( *it ), i + POPUP_BASE, i );
+    i++;
+  }
+  if ( !extPartsTranslated.isEmpty() )
+    popup->insertSeparator( i );
+  connect( popup, SIGNAL(activated(int)), this, SLOT(popupActivated(int)) );
+
+  popup->insertItem( SmallIconSet( "filesaveas" ), i18n( "&Save As..." ), this, SLOT(saveAs()), CTRL + Key_S, POPUP_BASE - 2, 0 );
+  popup->setItemEnabled( POPUP_BASE - 2, length() > 0 );
+
+  popup->insertSeparator( 1 );
+
+  popup->insertItem( i18n( "Highlight Syntax" ), this, SLOT(toggleSyntaxHighlight()), 0, POPUP_BASE - 1, 2 );
+  popup->setItemChecked( POPUP_BASE - 1, _highlight );
+  popup->insertSeparator( 3 );
+
+  popup->insertSeparator();
+  popup->insertItem( i18n("Hide view"), parent(), SLOT(hideView()) );
+
+  return popup;
+}
+
+void KDiffTextEdit::saveAs()
+{
+  QString fName = KFileDialog::getSaveFileName();
+  if ( fName.isEmpty() )
+    return;
+
+  QFile f( fName );
+  if ( f.open( IO_WriteOnly ) ) {
+    QTextStream stream( &f );
+    int pCount = paragraphs();
+    for ( int i = 0; i < pCount; ++i )
+      stream << text( i ) << "\n";
+    f.close();
+  } else {
+    KMessageBox::sorry( 0, i18n("Unable to open file."), i18n("Diff Frontend") );
+  }
+}
+
+void KDiffTextEdit::toggleSyntaxHighlight()
+{
+  _highlight = !_highlight;
+  if ( _highlight )
+    applySyntaxHighlight();
+  else
+    clearSyntaxHighlight();
+}
+
+void KDiffTextEdit::applySyntaxHighlight()
+{
+  // the diff has been loaded so we apply a simple highlighting
+  static QColor cAdded( 190, 190, 237);
+  static QColor cRemoved( 190, 237, 190 );
+
+  if ( !_highlight )
+    return;
+
+  int paragCount = paragraphs();
+  for ( int i = 0; i < paragCount; ++i ) {
+    QString txt = text( i );
+    if ( txt.length() > 0 ) {
+      if ( txt.startsWith( "+" ) || txt.startsWith( ">" ) ) {
+        setParagraphBackgroundColor( i, cAdded );
+      } else if ( txt.startsWith( "-" ) || txt.startsWith( "<" ) ) {
+        setParagraphBackgroundColor( i, cRemoved );
+      }
+    }
+  }
+}
+
+void KDiffTextEdit::clearSyntaxHighlight()
+{
+  int paragCount = paragraphs();
+  for ( int i = 0; i < paragCount; ++i ) {
+    clearParagraphBackground( i );
+  }
+}
+ 
+void KDiffTextEdit::searchExtParts()
+{
+  // only execute once
+  static bool init = false;
+  if ( init )
+    return;
+  init = true;
+
+  // search all parts that can handle text/x-diff
+  KTrader::OfferList offers = KTrader::self()->query("text/x-diff", "('KParts/ReadOnlyPart' in ServiceTypes) and ('text/x-diff' in ServiceTypes) and (DesktopEntryName != 'katepart')");
+  KTrader::OfferList::const_iterator it;
+  for ( it = offers.begin(); it != offers.end(); ++it ) {
+    KService::Ptr ptr = (*it);
+    extPartsTranslated << ptr->name();
+    extParts << ptr->desktopEntryName();
+  }
+  return;
+}
+
+void KDiffTextEdit::popupActivated( int id )
+{
+  id -= POPUP_BASE;
+  if ( id < 0 || id > (int)extParts.count() )
+    return;
+
+  emit externalPartRequested( extParts[ id ] );
+}
+
+DiffWidget::DiffWidget( DiffPart * part, QWidget *parent, const char *name, WFlags f ):
+    QWidget( parent, name, f ), m_part( part ), tempFile( 0 )
+{
+  job = 0;
+  extPart = 0;
+
+  te = new KDiffTextEdit( this, "Main Diff Viewer" );
+  te->setReadOnly( true );
+  te->setTextFormat( QTextEdit::PlainText );
+//  te->setMinimumSize( 300, 200 );
+  connect( te, SIGNAL(externalPartRequested(const QString&)), this, SLOT(loadExtPart(const QString&)) );
+
+  QVBoxLayout* layout = new QVBoxLayout( this );
+  layout->addWidget( te );
+}
+
+DiffWidget::~DiffWidget()
+{
+    m_part = 0;
+    delete tempFile;
+}
+
+void DiffWidget::setExtPartVisible( bool visible )
+{
+  if ( !extPart || !extPart->widget() ) {
+    te->show();
+    return;
+  }
+  if ( visible ) {
+    te->hide();
+    extPart->widget()->show();
+  } else {
+    te->show();
+    extPart->widget()->hide();
+  }
+}
+
+void DiffWidget::loadExtPart( const QString& partName )
+{
+  if ( extPart ) {
+    setExtPartVisible( false );
+    delete extPart;
+    extPart = 0;
+  }
+
+  KService::Ptr extService = KService::serviceByDesktopName( partName );
+  if ( !extService )
+    return;
+
+  extPart = KParts::ComponentFactory::createPartInstanceFromService<KParts::ReadOnlyPart>( extService, this, 0, this, 0 );
+  if ( !extPart || !extPart->widget() )
+    return;
+
+  layout()->add( extPart->widget() );
+
+  setExtPartVisible( true );
+
+  if ( te->paragraphs() > 0 )
+    populateExtPart();
+}
+
+void DiffWidget::slotClear()
+{
+  rawDiff = QString();
+  te->clear();
+  if ( extPart )
+    extPart->closeURL();
+}
+
+// internally for the TextEdit only!
+void DiffWidget::slotAppend( const QString& str )
+{
+  te->append( str );
+}
+
+// internally for the TextEdit only!
+void DiffWidget::slotAppend( KIO::Job*, const QByteArray& ba )
+{
+  slotAppend( QString( ba ) );
+}
+
+void DiffWidget::populateExtPart()
+{
+  if ( !extPart )
+    return;
+
+  bool ok = false;
+  int paragCount = te->paragraphs();
+  if ( extPart->openStream( "text/plain", KURL() ) ) {
+    for ( int i = 0; i < paragCount; ++i )
+      extPart->writeStream( rawDiff.local8Bit() );
+    ok = extPart->closeStream();
+  } else {
+      // workaround for parts that cannot handle streams
+      delete tempFile;
+      tempFile = new KTempFile();
+      tempFile->setAutoDelete( true );
+        *(tempFile->textStream()) << rawDiff.local8Bit() << endl;
+      tempFile->close();
+      ok = extPart->openURL( KURL::fromPathOrURL( tempFile->name() ) );
+  }
+  if ( !ok )
+    setExtPartVisible( false );
+}
+
+// internally for the TextEdit only!
+void DiffWidget::slotFinished()
+{
+    te->applySyntaxHighlight();
+    populateExtPart();
+}
+
+void DiffWidget::setDiff( const QString& diff )
+{
+  slotClear();
+  rawDiff = diff;
+  slotAppend( diff );
+  slotFinished();
+}
+
+void DiffWidget::openURL( const KURL& url )
+{
+  if ( job )
+    job->kill();
+
+  KIO::TransferJob* job = KIO::get( url );
+  if ( !job )
+    return;
+
+  connect( job, SIGNAL(data( KIO::Job *, const QByteArray & )),
+           this, SLOT(slotAppend( KIO::Job*, const QByteArray& )) );
+  connect( job, SIGNAL(result( KIO::Job * )),
+           this, SLOT(slotFinished()) );
+}
+
+void DiffWidget::contextMenuEvent( QContextMenuEvent* /* e */ )
+{
+  QPopupMenu* popup = new QPopupMenu( this );
+
+  if ( !te->isVisible() )
+  {
+    popup->insertItem( i18n("Display &Raw Output"), this, SLOT(showTextEdit()) );
+    popup->insertSeparator();
+    popup->insertItem( i18n("Hide view"), this, SLOT(hideView()) );
+  }
+
+  popup->exec( QCursor::pos() );
+  delete popup;
+}
+
+void DiffWidget::showExtPart()
+{
+  setExtPartVisible( true );
+}
+
+void DiffWidget::showTextEdit()
+{
+  setExtPartVisible( false );
+}
+
+void DiffWidget::hideView()
+{
+  m_part->mainWindow()->setViewAvailable( this, false );
+}
+
+#include "diffwidget.moc"