Editor: Show file encoding in editor toolbar

The file encoding is shown next to the current line in the toolbar. If
the label is clicked a dialog for encoding selection is shown.

Task-number: QTCREATORBUG-8376
Change-Id: I9adee76a31929de5f698d14fe5ca5abce3cc4633
Reviewed-by: David Schulz <david.schulz@digia.com>

src/plugins/texteditor/basetexteditor.cpp

@@ -541,12 +541,18 @@ void BaseTextEditorWidget::selectEncoding()
     case CodecSelector::Save:
         doc->setCodec(codecSelector.selectedCodec());
         Core::EditorManager::instance()->saveEditor(editor());
+        updateTextCodecLabel();
         break;
     case CodecSelector::Cancel:
         break;
     }
 }
 
+void BaseTextEditorWidget::updateTextCodecLabel()
+{
+    editor()->setFileEncodingLabelText(QString::fromLatin1(d->m_document->codec()->name()));
+}
+
 QString BaseTextEditorWidget::msgTextTooLarge(quint64 size)
 {
     return tr("The text is too large to be displayed (%1 MB).").
@@ -584,6 +590,13 @@ bool BaseTextEditorWidget::open(QString *errorString, const QString &fileName, c
     if (d->m_document->open(errorString, fileName, realFileName)) {
         moveCursor(QTextCursor::Start);
         updateCannotDecodeInfo();
+        if (editor()->m_fileEncodingLabel) {
+            connect(editor()->m_fileEncodingLabel, SIGNAL(clicked()), this,
+                    SLOT(selectEncoding()), Qt::UniqueConnection);
+            connect(d->m_document->document(), SIGNAL(modificationChanged(bool)), this,
+                    SLOT(updateTextCodecLabel()), Qt::UniqueConnection);
+            updateTextCodecLabel();
+        }
         return true;
     }
     return false;
@@ -5761,6 +5774,7 @@ void BaseTextEditorWidget::setDisplaySettings(const DisplaySettings &ds)
     setHighlightCurrentLine(ds.m_highlightCurrentLine);
     setRevisionsVisible(ds.m_markTextChanges);
     setCenterOnScroll(ds.m_centerCursorOnScroll);
+    editor()->setFileEncodingLabelVisible(ds.m_displayFileEncoding);
 
     if (d->m_displaySettings.m_visualizeWhitespace != ds.m_visualizeWhitespace) {
         if (SyntaxHighlighter *highlighter = baseTextDocument()->syntaxHighlighter())
@@ -6277,6 +6291,9 @@ BaseTextEditor::BaseTextEditor(BaseTextEditorWidget *editor)
     const int spacing = editor->style()->pixelMetric(QStyle::PM_LayoutHorizontalSpacing) / 2;
     m_cursorPositionLabel->setContentsMargins(spacing, 0, spacing, 0);
 
+    m_fileEncodingLabel = new Utils::LineColumnLabel;
+    m_fileEncodingLabel->setContentsMargins(spacing, 0, spacing, 0);
+
     m_stretchWidget = new QWidget;
     m_stretchWidget->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Preferred);
 
@@ -6284,7 +6301,9 @@ BaseTextEditor::BaseTextEditor(BaseTextEditorWidget *editor)
     m_toolBar->setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::Minimum);
     m_toolBar->addWidget(m_stretchWidget);
     m_cursorPositionLabelAction = m_toolBar->addWidget(m_cursorPositionLabel);
+    m_fileEncodingLabelAction = m_toolBar->addWidget(m_fileEncodingLabel);
 
+    setFileEncodingLabelVisible(editor->displaySettings().m_displayFileEncoding);
     connect(editor, SIGNAL(cursorPositionChanged()), this, SLOT(updateCursorPosition()));
     connect(m_cursorPositionLabel, SIGNAL(clicked()), this, SLOT(openGotoLocator()));
 }
@@ -6432,11 +6451,21 @@ void BaseTextEditor::openGotoLocator()
     }
 }
 
+void BaseTextEditor::setFileEncodingLabelVisible(bool visible)
+{
+    m_fileEncodingLabelAction->setVisible(visible);
+}
+
+void BaseTextEditor::setFileEncodingLabelText(const QString &text)
+{
+    m_fileEncodingLabel->setText(text, text);
+}
+
 QString BaseTextEditor::contextHelpId() const
 {
     if (m_contextHelpId.isEmpty())
         emit const_cast<BaseTextEditor*>(this)->contextHelpIdRequested(e->editor(),
-                                                                               e->textCursor().position());
+                                                                       e->textCursor().position());
     return m_contextHelpId;
 }
 

src/plugins/texteditor/basetexteditor.h

@@ -279,6 +279,7 @@ public slots:
     void fold();
     void unfold();
     void selectEncoding();
+    void updateTextCodecLabel();
 
     void gotoBlockStart();
     void gotoBlockEnd();
@@ -673,6 +674,8 @@ public:
 private slots:
     void updateCursorPosition();
     void openGotoLocator();
+    void setFileEncodingLabelVisible(bool visible);
+    void setFileEncodingLabelText(const QString &text);
 
 private:
     BaseTextEditorWidget *e;
@@ -680,6 +683,8 @@ private:
     QWidget *m_stretchWidget;
     QAction *m_cursorPositionLabelAction;
     Utils::LineColumnLabel *m_cursorPositionLabel;
+    QAction *m_fileEncodingLabelAction;
+    Utils::LineColumnLabel *m_fileEncodingLabel;
 };
 
 } // namespace TextEditor

src/plugins/texteditor/displaysettings.cpp

@@ -46,6 +46,7 @@ static const char markTextChangesKey[] = "MarkTextChanges";
 static const char autoFoldFirstCommentKey[] = "AutoFoldFirstComment";
 static const char centerCursorOnScrollKey[] = "CenterCursorOnScroll";
 static const char openLinksInNextSplitKey[] = "OpenLinksInNextSplitKey";
+static const char displayFileEncodingKey[] = "DisplayFileEncoding";
 static const char groupPostfix[] = "DisplaySettings";
 
 namespace TextEditor {
@@ -65,7 +66,8 @@ DisplaySettings::DisplaySettings() :
     m_autoFoldFirstComment(true),
     m_centerCursorOnScroll(false),
     m_openLinksInNextSplit(false),
-    m_forceOpenLinksInNextSplit(false)
+    m_forceOpenLinksInNextSplit(false),
+    m_displayFileEncoding(false)
 {
 }
 
@@ -89,6 +91,7 @@ void DisplaySettings::toSettings(const QString &category, QSettings *s) const
     s->setValue(QLatin1String(autoFoldFirstCommentKey), m_autoFoldFirstComment);
     s->setValue(QLatin1String(centerCursorOnScrollKey), m_centerCursorOnScroll);
     s->setValue(QLatin1String(openLinksInNextSplitKey), m_openLinksInNextSplit);
+    s->setValue(QLatin1String(displayFileEncodingKey), m_displayFileEncoding);
     s->endGroup();
 }
 
@@ -115,6 +118,7 @@ void DisplaySettings::fromSettings(const QString &category, const QSettings *s)
     m_autoFoldFirstComment = s->value(group + QLatin1String(autoFoldFirstCommentKey), m_autoFoldFirstComment).toBool();
     m_centerCursorOnScroll = s->value(group + QLatin1String(centerCursorOnScrollKey), m_centerCursorOnScroll).toBool();
     m_openLinksInNextSplit = s->value(group + QLatin1String(openLinksInNextSplitKey), m_openLinksInNextSplit).toBool();
+    m_displayFileEncoding = s->value(group + QLatin1String(displayFileEncodingKey), m_displayFileEncoding).toBool();
 }
 
 bool DisplaySettings::equals(const DisplaySettings &ds) const
@@ -134,6 +138,7 @@ bool DisplaySettings::equals(const DisplaySettings &ds) const
         && m_centerCursorOnScroll == ds.m_centerCursorOnScroll
         && m_openLinksInNextSplit == ds.m_openLinksInNextSplit
         && m_forceOpenLinksInNextSplit == ds.m_forceOpenLinksInNextSplit
+        && m_displayFileEncoding == ds.m_displayFileEncoding
         ;
 }
 

src/plugins/texteditor/displaysettings.h

@@ -61,6 +61,7 @@ public:
     bool m_centerCursorOnScroll;
     bool m_openLinksInNextSplit;
     bool m_forceOpenLinksInNextSplit;
+    bool m_displayFileEncoding;
 
     bool equals(const DisplaySettings &ds) const;
 };

src/plugins/texteditor/displaysettingspage.cpp

@@ -85,7 +85,8 @@ QWidget *DisplaySettingsPage::createPage(QWidget *parent)
           << ' ' << d->m_page->enableTextWrapping->text()
           << ' ' << d->m_page->autoFoldFirstComment->text()
           << ' ' << d->m_page->centerOnScroll->text()
-          << ' ' << d->m_page->openLinksInNextSplit->text();
+          << ' ' << d->m_page->openLinksInNextSplit->text()
+          << ' ' << d->m_page->displayFileEncoding->text();
         d->m_searchKeywords.remove(QLatin1Char('&'));
     }
     return w;
@@ -125,6 +126,7 @@ void DisplaySettingsPage::settingsFromUI(DisplaySettings &displaySettings) const
     displaySettings.m_autoFoldFirstComment = d->m_page->autoFoldFirstComment->isChecked();
     displaySettings.m_centerCursorOnScroll = d->m_page->centerOnScroll->isChecked();
     displaySettings.m_openLinksInNextSplit = d->m_page->openLinksInNextSplit->isChecked();
+    displaySettings.m_displayFileEncoding = d->m_page->displayFileEncoding->isChecked();
 }
 
 void DisplaySettingsPage::settingsToUI()
@@ -144,6 +146,7 @@ void DisplaySettingsPage::settingsToUI()
     d->m_page->autoFoldFirstComment->setChecked(displaySettings.m_autoFoldFirstComment);
     d->m_page->centerOnScroll->setChecked(displaySettings.m_centerCursorOnScroll);
     d->m_page->openLinksInNextSplit->setChecked(displaySettings.m_openLinksInNextSplit);
+    d->m_page->displayFileEncoding->setChecked(displaySettings.m_displayFileEncoding);
 }
 
 const DisplaySettings &DisplaySettingsPage::displaySettings() const

src/plugins/texteditor/displaysettingspage.ui

@@ -160,6 +160,13 @@
         </property>
        </widget>
       </item>
+      <item row="6" column="1">
+       <widget class="QCheckBox" name="displayFileEncoding">
+        <property name="text">
+         <string>Display file encoding</string>
+        </property>
+       </widget>
+      </item>
      </layout>
     </widget>
    </item>