Get rid of DiffShowEditor.

Made DiffEditor customizable instead

Change-Id: If92799d47c7e731febb45197384c082eb3af55df
Reviewed-by: Jarek Kobus <jaroslaw.kobus@digia.com>

13 files changed, 221 insertions, 393 deletions

diff --git a/src/plugins/diffeditor/diffeditor.cpp b/src/plugins/diffeditor/diffeditor.cpp
index 96c2e7e355..ee0edccaf8 100644
--- a/src/plugins/diffeditor/diffeditor.cpp
+++ b/src/plugins/diffeditor/diffeditor.cpp
@@ -34,6 +34,11 @@
 
 #include <coreplugin/icore.h>
 #include <coreplugin/coreconstants.h>
+#include <coreplugin/minisplitter.h>
+
+#include <texteditor/basetexteditor.h>
+#include <texteditor/texteditorsettings.h>
+#include <texteditor/displaysettings.h>
 
 #include <QToolButton>
 #include <QSpinBox>
@@ -44,23 +49,110 @@
 #include <QComboBox>
 #include <QFileInfo>
 
+using namespace TextEditor;
+
 namespace DiffEditor {
 
+namespace Internal {
+
+class DescriptionEditor : public BaseTextEditor
+{
+    Q_OBJECT
+public:
+    DescriptionEditor(BaseTextEditorWidget *editorWidget) : BaseTextEditor(editorWidget) {}
+
+    Core::Id id() const { return "DescriptionEditor"; }
+};
+
+class DescriptionEditorWidget : public BaseTextEditorWidget
+{
+    Q_OBJECT
+public:
+    DescriptionEditorWidget(QWidget *parent = 0);
+    virtual QSize sizeHint() const;
+
+public slots:
+    void setDisplaySettings(const DisplaySettings &ds);
+
+protected:
+    BaseTextEditor *createEditor() { return new DescriptionEditor(this); }
+
+private:
+};
+
+DescriptionEditorWidget::DescriptionEditorWidget(QWidget *parent)
+    : BaseTextEditorWidget(parent)
+{
+    DisplaySettings settings = displaySettings();
+    settings.m_textWrapping = false;
+    settings.m_displayLineNumbers = false;
+    settings.m_highlightCurrentLine = false;
+    settings.m_displayFoldingMarkers = false;
+    settings.m_markTextChanges = false;
+    settings.m_highlightBlocks = false;
+    BaseTextEditorWidget::setDisplaySettings(settings);
+
+    setCodeFoldingSupported(true);
+    setFrameStyle(QFrame::NoFrame);
+
+    setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Preferred);
+}
+
+QSize DescriptionEditorWidget::sizeHint() const
+{
+    QSize size = BaseTextEditorWidget::sizeHint();
+    size.setHeight(size.height() / 5);
+    return size;
+}
+
+void DescriptionEditorWidget::setDisplaySettings(const DisplaySettings &ds)
+{
+    DisplaySettings settings = displaySettings();
+    settings.m_visualizeWhitespace = ds.m_visualizeWhitespace;
+    BaseTextEditorWidget::setDisplaySettings(settings);
+}
+
+} // namespace Internal
+
 ///////////////////////////////// DiffEditor //////////////////////////////////
 
 DiffEditor::DiffEditor(SideBySideDiffEditorWidget *editorWidget)
     : IEditor(0)
     , m_toolWidget(0)
     , m_document(new Internal::DiffEditorDocument(QLatin1String(Constants::DIFF_EDITOR_MIMETYPE), this))
-    , m_editorWidget(editorWidget)
+    , m_diffWidget(editorWidget)
     , m_diffEditorController(0)
     , m_entriesComboBox(0)
+    , m_toggleDescriptionAction(0)
 {
-    setWidget(editorWidget);
+    QSplitter *splitter = new Core::MiniSplitter(Qt::Vertical);
+    m_descriptionWidget = new Internal::DescriptionEditorWidget(splitter);
+    m_descriptionWidget->setReadOnly(true);
+    splitter->addWidget(m_descriptionWidget);
+    splitter->addWidget(editorWidget);
+    setWidget(splitter);
+
+    connect(TextEditorSettings::instance(), SIGNAL(displaySettingsChanged(TextEditor::DisplaySettings)),
+            m_descriptionWidget, SLOT(setDisplaySettings(TextEditor::DisplaySettings)));
+    connect(TextEditorSettings::instance(), SIGNAL(fontSettingsChanged(TextEditor::FontSettings)),
+            m_descriptionWidget->baseTextDocument(), SLOT(setFontSettings(TextEditor::FontSettings)));
+    m_descriptionWidget->setDisplaySettings(TextEditorSettings::displaySettings());
+    m_descriptionWidget->setCodeStyle(TextEditorSettings::codeStyle());
+    m_descriptionWidget->baseTextDocument()->setFontSettings(TextEditorSettings::fontSettings());
+
     m_diffEditorController = editorWidget ? editorWidget->diffEditorController() : 0;
     if (m_diffEditorController) {
         connect(m_diffEditorController, SIGNAL(currentDiffFileIndexChanged(int)),
                 this, SLOT(activateEntry(int)));
+        connect(m_diffEditorController, SIGNAL(descriptionChanged(QString)),
+                this, SLOT(slotDescriptionChanged(QString)));
+        connect(m_diffEditorController, SIGNAL(descriptionEnablementChanged(bool)),
+                this, SLOT(slotDescriptionVisibilityChanged()));
+        connect(m_diffEditorController, SIGNAL(descriptionVisibilityChanged(bool)),
+                this, SLOT(slotDescriptionVisibilityChanged()));
+
+        slotDescriptionChanged(m_diffEditorController->description());
+        slotDescriptionVisibilityChanged();
     }
 }
 
@@ -91,7 +183,7 @@ Core::Id DiffEditor::id() const
 
 QTextCodec *DiffEditor::codec() const
 {
-    return m_editorWidget->codec();
+    return m_diffWidget->codec();
 }
 
 static QToolBar *createToolBar(const QWidget *someWidget)
@@ -111,7 +203,7 @@ QWidget *DiffEditor::toolBar()
         return m_toolWidget;
 
     // Create
-    m_toolWidget = createToolBar(m_editorWidget);
+    m_toolWidget = createToolBar(m_diffWidget);
 
     m_entriesComboBox = new QComboBox;
     m_entriesComboBox->setMinimumContentsLength(20);
@@ -148,6 +240,13 @@ QWidget *DiffEditor::toolBar()
     toggleSync->setToolTip(tr("Synchronize Horizontal Scroll Bars"));
     m_toolWidget->addWidget(toggleSync);
 
+    QToolButton *toggleDescription = new QToolButton(m_toolWidget);
+    toggleDescription->setIcon(QIcon(QLatin1String(Core::Constants::ICON_TOGGLE_TOPBAR)));
+    toggleDescription->setCheckable(true);
+    toggleDescription->setChecked(true);
+    m_toggleDescriptionAction = m_toolWidget->addWidget(toggleDescription);
+    slotDescriptionVisibilityChanged();
+
     if (m_diffEditorController) {
         connect(whitespaceButton, SIGNAL(clicked(bool)),
                 m_diffEditorController, SLOT(setIgnoreWhitespaces(bool)));
@@ -155,6 +254,8 @@ QWidget *DiffEditor::toolBar()
                 m_diffEditorController, SLOT(setContextLinesNumber(int)));
         connect(toggleSync, SIGNAL(clicked(bool)),
                 m_diffEditorController, SLOT(setHorizontalScrollBarSynchronization(bool)));
+        connect(toggleDescription, SIGNAL(clicked(bool)),
+                m_diffEditorController, SLOT(setDescriptionVisible(bool)));
         // TODO: synchronize in opposite direction too
     }
 
@@ -206,6 +307,18 @@ void DiffEditor::setDiff(const QList<DiffEditorController::DiffFilesContents> &d
         m_diffEditorController->setDiffContents(diffFileList, workingDirectory);
 }
 
+void DiffEditor::setDescription(const QString &description)
+{
+    if (m_diffEditorController)
+        m_diffEditorController->setDescription(description);
+}
+
+void DiffEditor::setDescriptionEnabled(bool on)
+{
+    if (m_diffEditorController)
+        m_diffEditorController->setDescriptionEnabled(on);
+}
+
 void DiffEditor::clear(const QString &message)
 {
     m_entriesComboBox->clear();
@@ -236,4 +349,34 @@ void DiffEditor::activateEntry(int index)
     updateEntryToolTip();
 }
 
+void DiffEditor::slotDescriptionChanged(const QString &description)
+{
+    m_descriptionWidget->setPlainText(description);
+}
+
+void DiffEditor::slotDescriptionVisibilityChanged()
+{
+    if (!m_diffEditorController)
+        return;
+
+    const bool visible = m_diffEditorController->isDescriptionVisible();
+    const bool enabled = m_diffEditorController->isDescriptionEnabled();
+
+    m_descriptionWidget->setVisible(visible && enabled);
+
+    if (!m_toggleDescriptionAction)
+        return;
+
+    QWidget *toggle = m_toolWidget->widgetForAction(m_toggleDescriptionAction);
+    if (visible)
+        toggle->setToolTip(tr("Hide Change Description"));
+    else
+        toggle->setToolTip(tr("Show Change Description"));
+
+    m_toggleDescriptionAction->setVisible(enabled);
+
+}
+
 } // namespace DiffEditor
+
+#include "diffeditor.moc"
diff --git a/src/plugins/diffeditor/diffeditor.h b/src/plugins/diffeditor/diffeditor.h
index 14bb779dd5..f149f8e58e 100644
--- a/src/plugins/diffeditor/diffeditor.h
+++ b/src/plugins/diffeditor/diffeditor.h
@@ -39,14 +39,15 @@
 QT_BEGIN_NAMESPACE
 class QToolBar;
 class QComboBox;
+class QToolButton;
 QT_END_NAMESPACE
 
+namespace TextEditor { class BaseTextEditorWidget; }
+
 namespace DiffEditor {
 class SideBySideDiffEditorWidget;
 
-namespace Internal {
-class DiffEditorDocument;
-}
+namespace Internal { class DiffEditorDocument; }
 
 class DIFFEDITOR_EXPORT DiffEditor : public Core::IEditor
 {
@@ -58,6 +59,8 @@ public:
 public:
     void setDiff(const QList<DiffEditorController::DiffFilesContents> &diffFileList,
                  const QString &workingDirectory = QString());
+    void setDescription(const QString &description);
+    void setDescriptionEnabled(bool on);
     void clear(const QString &message);
 
     // Core::IEditor
@@ -73,6 +76,8 @@ public slots:
 
 private slots:
     void entryActivated(int index);
+    void slotDescriptionChanged(const QString &description);
+    void slotDescriptionVisibilityChanged();
 
 protected:
     QToolBar *m_toolWidget;
@@ -81,9 +86,11 @@ private:
     void updateEntryToolTip();
 
     Internal::DiffEditorDocument *m_document;
-    SideBySideDiffEditorWidget *m_editorWidget;
+    TextEditor::BaseTextEditorWidget *m_descriptionWidget;
+    SideBySideDiffEditorWidget *m_diffWidget;
     DiffEditorController *m_diffEditorController;
     QComboBox *m_entriesComboBox;
+    QAction *m_toggleDescriptionAction;
 };
 
 } // namespace DiffEditor
diff --git a/src/plugins/diffeditor/diffeditor.pro b/src/plugins/diffeditor/diffeditor.pro
index a6f655118e..38554f1c5c 100644
--- a/src/plugins/diffeditor/diffeditor.pro
+++ b/src/plugins/diffeditor/diffeditor.pro
@@ -9,8 +9,6 @@ HEADERS += diffeditor_global.h \
         diffeditorfactory.h \
         diffeditorplugin.h \
         differ.h \
-        diffshoweditor.h \
-        diffshoweditorfactory.h \
         sidebysidediffeditorwidget.h
 
 SOURCES += diffeditor.cpp \
@@ -19,8 +17,6 @@ SOURCES += diffeditor.cpp \
         diffeditorfactory.cpp \
         diffeditorplugin.cpp \
         differ.cpp \
-        diffshoweditor.cpp \
-        diffshoweditorfactory.cpp \
         sidebysidediffeditorwidget.cpp
 
 RESOURCES +=
diff --git a/src/plugins/diffeditor/diffeditor.qbs b/src/plugins/diffeditor/diffeditor.qbs
index 85ec1d912a..56bd28e5fb 100644
--- a/src/plugins/diffeditor/diffeditor.qbs
+++ b/src/plugins/diffeditor/diffeditor.qbs
@@ -25,10 +25,6 @@ QtcPlugin {
         "diffeditorplugin.h",
         "differ.cpp",
         "differ.h",
-        "diffshoweditor.cpp",
-        "diffshoweditor.h",
-        "diffshoweditorfactory.cpp",
-        "diffshoweditorfactory.h",
         "sidebysidediffeditorwidget.cpp",
         "sidebysidediffeditorwidget.h",
     ]
diff --git a/src/plugins/diffeditor/diffeditorconstants.h b/src/plugins/diffeditor/diffeditorconstants.h
index 8b94624d86..6180557dbb 100644
--- a/src/plugins/diffeditor/diffeditorconstants.h
+++ b/src/plugins/diffeditor/diffeditorconstants.h
@@ -38,8 +38,6 @@ namespace Constants {
 const char DIFF_EDITOR_ID[] = "Diff Editor";
 const char DIFF_EDITOR_DISPLAY_NAME[] = QT_TRANSLATE_NOOP("DiffEditor", "Diff Editor");
 const char DIFF_EDITOR_MIMETYPE[] = "text/x-patch";
-const char DIFF_SHOW_EDITOR_ID[] = "Show Editor";
-const char DIFF_SHOW_EDITOR_DISPLAY_NAME[] = QT_TRANSLATE_NOOP("ShowEditor", "Show Editor");
 const char G_TOOLS_DIFF[] = "QtCreator.Group.Tools.Options";
 
 } // namespace Constants
diff --git a/src/plugins/diffeditor/diffeditorcontroller.cpp b/src/plugins/diffeditor/diffeditorcontroller.cpp
index 5aa790e5a6..4f2e749d89 100644
--- a/src/plugins/diffeditor/diffeditorcontroller.cpp
+++ b/src/plugins/diffeditor/diffeditorcontroller.cpp
@@ -33,9 +33,12 @@ namespace DiffEditor {
 
 DiffEditorController::DiffEditorController(QObject *parent)
     : QObject(parent),
+      m_descriptionEnabled(false),
+      m_descriptionVisible(true),
       m_contextLinesNumber(3),
       m_ignoreWhitespaces(true),
-      m_syncScrollBars(true)
+      m_syncScrollBars(true),
+      m_currentDiffFileIndex(-1)
 {
     clear();
 }
@@ -60,6 +63,21 @@ QString DiffEditorController::workingDirectory() const
     return m_workingDirectory;
 }
 
+QString DiffEditorController::description() const
+{
+    return m_description;
+}
+
+bool DiffEditorController::isDescriptionEnabled() const
+{
+    return m_descriptionEnabled;
+}
+
+bool DiffEditorController::isDescriptionVisible() const
+{
+    return m_descriptionVisible;
+}
+
 int DiffEditorController::contextLinesNumber() const
 {
     return m_contextLinesNumber;
@@ -100,6 +118,33 @@ void DiffEditorController::setDiffContents(const QList<DiffFilesContents> &diffF
     emit diffContentsChanged(diffFileList, workingDirectory);
 }
 
+void DiffEditorController::setDescription(const QString &description)
+{
+    if (m_description == description)
+        return;
+
+    m_description = description;
+    emit descriptionChanged(description);
+}
+
+void DiffEditorController::setDescriptionEnabled(bool on)
+{
+    if (m_descriptionEnabled == on)
+        return;
+
+    m_descriptionEnabled = on;
+    emit descriptionEnablementChanged(on);
+}
+
+void DiffEditorController::setDescriptionVisible(bool on)
+{
+    if (m_descriptionVisible == on)
+        return;
+
+    m_descriptionVisible = on;
+    emit descriptionVisibilityChanged(on);
+}
+
 void DiffEditorController::setContextLinesNumber(int lines)
 {
     const int l = qMax(lines, -1);
diff --git a/src/plugins/diffeditor/diffeditorcontroller.h b/src/plugins/diffeditor/diffeditorcontroller.h
index a03d54052f..0367974315 100644
--- a/src/plugins/diffeditor/diffeditorcontroller.h
+++ b/src/plugins/diffeditor/diffeditorcontroller.h
@@ -70,7 +70,10 @@ public:
 
     QList<DiffFilesContents> diffContents() const;
     QString workingDirectory() const;
+    QString description() const;
+    bool isDescriptionEnabled() const;
 
+    bool isDescriptionVisible() const;
     int contextLinesNumber() const;
     bool isIgnoreWhitespaces() const;
     bool horizontalScrollBarSynchronization() const;
@@ -80,7 +83,10 @@ public slots:
     void clear();
     void clear(const QString &message);
     void setDiffContents(const QList<DiffEditorController::DiffFilesContents> &diffFileList, const QString &workingDirectory = QString());
+    void setDescription(const QString &description);
+    void setDescriptionEnabled(bool on);
 
+    void setDescriptionVisible(bool on);
     void setContextLinesNumber(int lines);
     void setIgnoreWhitespaces(bool ignore);
     void setHorizontalScrollBarSynchronization(bool on);
@@ -91,7 +97,10 @@ signals:
     void cleared(const QString message);
     // This sets the current diff file index to 0 (unless diffFileList is empty)
     void diffContentsChanged(const QList<DiffEditorController::DiffFilesContents> &diffFileList, const QString &workingDirectory);
+    void descriptionChanged(const QString &description);
+    void descriptionEnablementChanged(bool on);
 
+    void descriptionVisibilityChanged(bool on);
     void contextLinesNumberChanged(int lines);
     void ignoreWhitespacesChanged(bool ignore);
     void horizontalScrollBarSynchronizationChanged(bool on);
@@ -102,7 +111,10 @@ private:
 
     QList<DiffFilesContents> m_diffFileList;
     QString m_workingDirectory;
+    QString m_description;
+    bool m_descriptionEnabled;
 
+    bool m_descriptionVisible;
     int m_contextLinesNumber;
     bool m_ignoreWhitespaces;
     bool m_syncScrollBars;
diff --git a/src/plugins/diffeditor/diffeditorplugin.cpp b/src/plugins/diffeditor/diffeditorplugin.cpp
index 812993fa81..71c3b2a024 100644
--- a/src/plugins/diffeditor/diffeditorplugin.cpp
+++ b/src/plugins/diffeditor/diffeditorplugin.cpp
@@ -31,8 +31,6 @@
 #include "diffeditor.h"
 #include "diffeditorconstants.h"
 #include "diffeditorfactory.h"
-#include "diffshoweditor.h"
-#include "diffshoweditorfactory.h"
 #include "sidebysidediffeditorwidget.h"
 
 #include <QFileDialog>
@@ -74,7 +72,6 @@ bool DiffEditorPlugin::initialize(const QStringList &arguments, QString *errorMe
     toolsContainer->addAction(diffCommand, Constants::G_TOOLS_DIFF);
 
     addAutoReleasedObject(new DiffEditorFactory(this));
-    addAutoReleasedObject(new DiffShowEditorFactory(this));
 
     return true;
 }
diff --git a/src/plugins/diffeditor/diffshoweditor.cpp b/src/plugins/diffeditor/diffshoweditor.cpp
deleted file mode 100644
index 5da07d929d..0000000000
--- a/src/plugins/diffeditor/diffshoweditor.cpp
+++ /dev/null
@@ -1,176 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
-** Contact: http://www.qt-project.org/legal
-**
-** This file is part of Qt Creator.
-**
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and Digia.  For licensing terms and
-** conditions see http://qt.digia.com/licensing.  For further information
-** use the contact form at http://qt.digia.com/contact-us.
-**
-** GNU Lesser General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU Lesser
-** General Public License version 2.1 as published by the Free Software
-** Foundation and appearing in the file LICENSE.LGPL included in the
-** packaging of this file.  Please review the following information to
-** ensure the GNU Lesser General Public License version 2.1 requirements
-** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
-**
-** In addition, as a special exception, Digia gives you certain additional
-** rights.  These rights are described in the Digia Qt LGPL Exception
-** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
-**
-****************************************************************************/
-
-#include "diffshoweditor.h"
-#include "diffeditorconstants.h"
-#include "sidebysidediffeditorwidget.h"
-
-#include <QToolBar>
-#include <QToolButton>
-#include <QCoreApplication>
-
-#include <coreplugin/coreconstants.h>
-#include <coreplugin/minisplitter.h>
-
-#include <texteditor/basetexteditor.h>
-#include <texteditor/texteditorsettings.h>
-#include <texteditor/displaysettings.h>
-
-using namespace TextEditor;
-
-namespace DiffEditor {
-
-namespace Internal {
-
-class DiffShowEditorWidgetEditable : public BaseTextEditor
-{
-    Q_OBJECT
-public:
-    DiffShowEditorWidgetEditable(BaseTextEditorWidget *editorWidget) : BaseTextEditor(editorWidget) {}
-
-    Core::Id id() const { return "DiffShowViewEditor"; }
-};
-
-class DiffShowEditorWidget : public BaseTextEditorWidget
-{
-    Q_OBJECT
-public:
-    DiffShowEditorWidget(QWidget *parent = 0);
-    virtual QSize sizeHint() const;
-
-public slots:
-    void setDisplaySettings(const DisplaySettings &ds);
-
-protected:
-    BaseTextEditor *createEditor() { return new DiffShowEditorWidgetEditable(this); }
-
-private:
-};
-
-DiffShowEditorWidget::DiffShowEditorWidget(QWidget *parent)
-    : BaseTextEditorWidget(parent)
-{
-    DisplaySettings settings = displaySettings();
-    settings.m_textWrapping = false;
-    settings.m_displayLineNumbers = false;
-    settings.m_highlightCurrentLine = false;
-    settings.m_displayFoldingMarkers = false;
-    settings.m_markTextChanges = false;
-    settings.m_highlightBlocks = false;
-    BaseTextEditorWidget::setDisplaySettings(settings);
-
-    setCodeFoldingSupported(true);
-    setFrameStyle(QFrame::NoFrame);
-
-    setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Preferred);
-}
-
-QSize DiffShowEditorWidget::sizeHint() const
-{
-    QSize size = BaseTextEditorWidget::sizeHint();
-    size.setHeight(size.height() / 5);
-    return size;
-}
-
-void DiffShowEditorWidget::setDisplaySettings(const DisplaySettings &ds)
-{
-    DisplaySettings settings = displaySettings();
-    settings.m_visualizeWhitespace = ds.m_visualizeWhitespace;
-    BaseTextEditorWidget::setDisplaySettings(settings);
-}
-
-} // namespace Internal
-
-DiffShowEditor::DiffShowEditor(SideBySideDiffEditorWidget *editorWidget)
-    : DiffEditor(editorWidget)
-{
-    document()->setDisplayName(QCoreApplication::translate("DiffShowEditor",
-                                                           Constants::DIFF_SHOW_EDITOR_DISPLAY_NAME));
-    QSplitter *splitter = new Core::MiniSplitter(Qt::Vertical);
-    m_diffShowWidget = new Internal::DiffShowEditorWidget(splitter);
-    m_diffShowWidget->setReadOnly(true);
-    splitter->addWidget(m_diffShowWidget);
-    splitter->addWidget(editorWidget);
-    setWidget(splitter);
-
-    connect(TextEditorSettings::instance(), SIGNAL(displaySettingsChanged(TextEditor::DisplaySettings)),
-            m_diffShowWidget, SLOT(setDisplaySettings(TextEditor::DisplaySettings)));
-    connect(TextEditorSettings::instance(), SIGNAL(fontSettingsChanged(TextEditor::FontSettings)),
-            m_diffShowWidget->baseTextDocument(), SLOT(setFontSettings(TextEditor::FontSettings)));
-    m_diffShowWidget->setDisplaySettings(TextEditorSettings::displaySettings());
-    m_diffShowWidget->setCodeStyle(TextEditorSettings::codeStyle());
-    m_diffShowWidget->baseTextDocument()->setFontSettings(TextEditorSettings::fontSettings());
-}
-
-DiffShowEditor::~DiffShowEditor()
-{
-}
-
-void DiffShowEditor::setDescription(const QString &description)
-{
-    m_diffShowWidget->setPlainText(description);
-}
-
-Core::Id DiffShowEditor::id() const
-{
-    return Constants::DIFF_SHOW_EDITOR_ID;
-}
-
-QWidget *DiffShowEditor::toolBar()
-{
-    if (m_toolWidget)
-        return m_toolWidget;
-
-    // Create
-    DiffEditor::toolBar();
-
-    m_toggleDescriptionButton = new QToolButton(m_toolWidget);
-    m_toggleDescriptionButton->setIcon(QIcon(QLatin1String(Core::Constants::ICON_TOGGLE_TOPBAR)));
-    m_toggleDescriptionButton->setCheckable(true);
-    m_toggleDescriptionButton->setChecked(true);
-    connect(m_toggleDescriptionButton, SIGNAL(clicked(bool)),
-            this, SLOT(setDescriptionVisible(bool)));
-    m_toolWidget->addWidget(m_toggleDescriptionButton);
-    setDescriptionVisible(true);
-
-    return m_toolWidget;
-}
-
-void DiffShowEditor::setDescriptionVisible(bool visible)
-{
-    if (visible)
-        m_toggleDescriptionButton->setToolTip(tr("Hide Change Description"));
-    else
-        m_toggleDescriptionButton->setToolTip(tr("Show Change Description"));
-    m_diffShowWidget->setVisible(visible);
-}
-
-} // namespace DiffEditor
-
-#include "diffshoweditor.moc"
diff --git a/src/plugins/diffeditor/diffshoweditor.h b/src/plugins/diffeditor/diffshoweditor.h
deleted file mode 100644
index ff30cc3e6a..0000000000
--- a/src/plugins/diffeditor/diffshoweditor.h
+++ /dev/null
@@ -1,73 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
-** Contact: http://www.qt-project.org/legal
-**
-** This file is part of Qt Creator.
-**
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and Digia.  For licensing terms and
-** conditions see http://qt.digia.com/licensing.  For further information
-** use the contact form at http://qt.digia.com/contact-us.
-**
-** GNU Lesser General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU Lesser
-** General Public License version 2.1 as published by the Free Software
-** Foundation and appearing in the file LICENSE.LGPL included in the
-** packaging of this file.  Please review the following information to
-** ensure the GNU Lesser General Public License version 2.1 requirements
-** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
-**
-** In addition, as a special exception, Digia gives you certain additional
-** rights.  These rights are described in the Digia Qt LGPL Exception
-** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
-**
-****************************************************************************/
-
-#ifndef DIFFSHOWEDITOR_H
-#define DIFFSHOWEDITOR_H
-
-#include "diffeditor_global.h"
-#include "diffeditor.h"
-
-#include <coreplugin/editormanager/ieditor.h>
-#include <coreplugin/idocument.h>
-
-QT_BEGIN_NAMESPACE
-class QToolButton;
-QT_END_NAMESPACE
-
-namespace TextEditor { class BaseTextEditorWidget; }
-
-namespace DiffEditor {
-
-class DIFFEDITOR_EXPORT DiffShowEditor : public DiffEditor
-{
-    Q_OBJECT
-public:
-    explicit DiffShowEditor(SideBySideDiffEditorWidget *editorWidget);
-    virtual ~DiffShowEditor();
-
-public:
-    void setDescription(const QString &description);
-    // Core::IEditor
-    Core::Id id() const;
-
-    QWidget *toolBar();
-
-private slots:
-    void setDescriptionVisible(bool visible);
-
-private:
-    void updateEntryToolTip();
-
-    TextEditor::BaseTextEditorWidget *m_diffShowWidget;
-    QToolButton *m_toggleDescriptionButton;
-};
-
-} // namespace DiffEditor
-
-#endif // DIFFEDITOR_H
diff --git a/src/plugins/diffeditor/diffshoweditorfactory.cpp b/src/plugins/diffeditor/diffshoweditorfactory.cpp
deleted file mode 100644
index f0acb1d8cf..0000000000
--- a/src/plugins/diffeditor/diffshoweditorfactory.cpp
+++ /dev/null
@@ -1,59 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
-** Contact: http://www.qt-project.org/legal
-**
-** This file is part of Qt Creator.
-**
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and Digia.  For licensing terms and
-** conditions see http://qt.digia.com/licensing.  For further information
-** use the contact form at http://qt.digia.com/contact-us.
-**
-** GNU Lesser General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU Lesser
-** General Public License version 2.1 as published by the Free Software
-** Foundation and appearing in the file LICENSE.LGPL included in the
-** packaging of this file.  Please review the following information to
-** ensure the GNU Lesser General Public License version 2.1 requirements
-** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
-**
-** In addition, as a special exception, Digia gives you certain additional
-** rights.  These rights are described in the Digia Qt LGPL Exception
-** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
-**
-****************************************************************************/
-
-#include "diffeditorconstants.h"
-#include "diffshoweditorfactory.h"
-#include "diffshoweditor.h"
-#include "sidebysidediffeditorwidget.h"
-
-#include <QCoreApplication>
-
-namespace DiffEditor {
-
-namespace Internal {
-
-DiffShowEditorFactory::DiffShowEditorFactory(QObject *parent)
-    : IEditorFactory(parent)
-{
-    setId(Constants::DIFF_SHOW_EDITOR_ID);
-    setDisplayName(qApp->translate("DiffEditorFactory", Constants::DIFF_SHOW_EDITOR_DISPLAY_NAME));
-    setMimeTypes(QStringList() << QLatin1String(Constants::DIFF_EDITOR_MIMETYPE));
-}
-
-Core::IEditor *DiffShowEditorFactory::createEditor()
-{
-    SideBySideDiffEditorWidget *editorWidget = new SideBySideDiffEditorWidget();
-    DiffEditorController *editorController = new DiffEditorController(editorWidget);
-    editorWidget->setDiffEditorController(editorController);
-    DiffShowEditor *editor = new DiffShowEditor(editorWidget);
-    return editor;
-}
-
-} // namespace Internal
-} // namespace DiffEditor
diff --git a/src/plugins/diffeditor/diffshoweditorfactory.h b/src/plugins/diffeditor/diffshoweditorfactory.h
deleted file mode 100644
index b1823a27a9..0000000000
--- a/src/plugins/diffeditor/diffshoweditorfactory.h
+++ /dev/null
@@ -1,56 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
-** Contact: http://www.qt-project.org/legal
-**
-** This file is part of Qt Creator.
-**
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and Digia.  For licensing terms and
-** conditions see http://qt.digia.com/licensing.  For further information
-** use the contact form at http://qt.digia.com/contact-us.
-**
-** GNU Lesser General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU Lesser
-** General Public License version 2.1 as published by the Free Software
-** Foundation and appearing in the file LICENSE.LGPL included in the
-** packaging of this file.  Please review the following information to
-** ensure the GNU Lesser General Public License version 2.1 requirements
-** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
-**
-** In addition, as a special exception, Digia gives you certain additional
-** rights.  These rights are described in the Digia Qt LGPL Exception
-** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
-**
-****************************************************************************/
-
-#ifndef DIFFSHOWEDITORFACTORY_H
-#define DIFFSHOWEDITORFACTORY_H
-
-#include "diffeditor_global.h"
-
-#include <QStringList>
-
-#include <coreplugin/editormanager/ieditorfactory.h>
-
-namespace DiffEditor {
-
-namespace Internal {
-
-class DiffShowEditorFactory : public Core::IEditorFactory
-{
-    Q_OBJECT
-
-public:
-    explicit DiffShowEditorFactory(QObject *parent);
-
-    Core::IEditor *createEditor();
-};
-
-} // namespace Internal
-} // namespace DiffEditor
-
-#endif // DIFFSHOWEDITORFACTORY_H
diff --git a/src/plugins/git/gitclient.cpp b/src/plugins/git/gitclient.cpp
index b34d3ab0e6..a5783fa3b9 100644
--- a/src/plugins/git/gitclient.cpp
+++ b/src/plugins/git/gitclient.cpp
@@ -60,7 +60,6 @@
 #include <vcsbase/vcsbaseplugin.h>
 
 #include <diffeditor/diffeditor.h>
-#include <diffeditor/diffshoweditor.h>
 #include <diffeditor/diffeditorconstants.h>
 
 #include <QCoreApplication>
@@ -375,11 +374,9 @@ void GitDiffHandler::slotShowDescriptionReceived(const QString &description)
 {
     if (m_editor.isNull())
         return;
-    DiffEditor::DiffShowEditor *editor = qobject_cast<DiffEditor::DiffShowEditor *>(m_editor);
-    if (editor) {
-        editor->setDescription(GitPlugin::instance()->gitClient()->
-                               extendedShowDescription(m_workingDirectory, description));
-    }
+
+    m_editor->setDescription(GitPlugin::instance()->gitClient()->
+                             extendedShowDescription(m_workingDirectory, description));
 
     collectFilesList(QStringList()
                      << m_requestedRevisionRange.begin.id
@@ -1446,7 +1443,8 @@ void GitClient::show(const QString &source, const QString &id,
                                                       id,
                                                       source,
                                                       title,
-                                                      DiffEditor::Constants::DIFF_SHOW_EDITOR_ID);
+                                                      DiffEditor::Constants::DIFF_EDITOR_ID);
+            diffEditor->setDescriptionEnabled(true);
         }
 
         GitDiffHandler *handler = new GitDiffHandler(diffEditor,