Add "center cursor on scroll" option for the base text editor

src/plugins/texteditor/basetexteditor.cpp

@@ -5328,6 +5328,7 @@ void BaseTextEditor::setDisplaySettings(const DisplaySettings &ds)
     setCodeFoldingVisible(ds.m_displayFoldingMarkers);
     setHighlightCurrentLine(ds.m_highlightCurrentLine);
     setRevisionsVisible(ds.m_markTextChanges);
+    setCenterOnScroll(ds.m_centerCursorOnScroll);
 
     if (d->m_displaySettings.m_visualizeWhitespace != ds.m_visualizeWhitespace) {
         if (QSyntaxHighlighter *highlighter = baseTextDocument()->syntaxHighlighter())

src/plugins/texteditor/displaysettings.cpp

@@ -42,7 +42,8 @@ static const char * const highlightCurrentLineKey = "HighlightCurrentLine2Key";
 static const char * const highlightBlocksKey = "HighlightBlocksKey";
 static const char * const animateMatchingParenthesesKey= "AnimateMatchingParenthesesKey";
 static const char * const markTextChangesKey = "MarkTextChanges";
-static const char * const autoFoldFirstCommentKey= "AutoFoldFirstComment";
+static const char * const autoFoldFirstCommentKey = "AutoFoldFirstComment";
+static const char * const centerCursorOnScrollKey = "CenterCursorOnScroll";
 static const char * const groupPostfix = "DisplaySettings";
 
 namespace TextEditor {
@@ -58,7 +59,8 @@ DisplaySettings::DisplaySettings() :
     m_highlightBlocks(false),
     m_animateMatchingParentheses(true),
     m_markTextChanges(true),
-    m_autoFoldFirstComment(true)
+    m_autoFoldFirstComment(true),
+    m_centerCursorOnScroll(false)
 {
 }
 
@@ -79,6 +81,7 @@ void DisplaySettings::toSettings(const QString &category, QSettings *s) const
     s->setValue(QLatin1String(animateMatchingParenthesesKey), m_animateMatchingParentheses);
     s->setValue(QLatin1String(markTextChangesKey), m_markTextChanges);
     s->setValue(QLatin1String(autoFoldFirstCommentKey), m_autoFoldFirstComment);
+    s->setValue(QLatin1String(centerCursorOnScrollKey), m_centerCursorOnScroll);
     s->endGroup();
 }
 
@@ -102,6 +105,7 @@ void DisplaySettings::fromSettings(const QString &category, const QSettings *s)
     m_animateMatchingParentheses = s->value(group + QLatin1String(animateMatchingParenthesesKey), m_animateMatchingParentheses).toBool();
     m_markTextChanges = s->value(group + QLatin1String(markTextChangesKey), m_markTextChanges).toBool();
     m_autoFoldFirstComment = s->value(group + QLatin1String(autoFoldFirstCommentKey), m_autoFoldFirstComment).toBool();
+    m_centerCursorOnScroll = s->value(group + QLatin1String(centerCursorOnScrollKey), m_centerCursorOnScroll).toBool();
 }
 
 bool DisplaySettings::equals(const DisplaySettings &ds) const
@@ -117,6 +121,7 @@ bool DisplaySettings::equals(const DisplaySettings &ds) const
         && m_animateMatchingParentheses == ds.m_animateMatchingParentheses
         && m_markTextChanges == ds.m_markTextChanges
         && m_autoFoldFirstComment== ds.m_autoFoldFirstComment
+        && m_centerCursorOnScroll == ds.m_centerCursorOnScroll
         ;
 }
 

src/plugins/texteditor/displaysettings.h

@@ -56,6 +56,7 @@ struct TEXTEDITOR_EXPORT DisplaySettings
     bool m_animateMatchingParentheses;
     bool m_markTextChanges;
     bool m_autoFoldFirstComment;
+    bool m_centerCursorOnScroll;
 
     bool equals(const DisplaySettings &ds) const;
 };

src/plugins/texteditor/displaysettingspage.cpp

@@ -92,7 +92,8 @@ QWidget *DisplaySettingsPage::createPage(QWidget *parent)
           << ' ' << m_d->m_page.visualizeWhitespace->text()
           << ' ' << m_d->m_page.animateMatchingParentheses->text()
           << ' ' << m_d->m_page.enableTextWrapping->text()
-          << ' ' << m_d->m_page.autoFoldFirstComment->text();
+          << ' ' << m_d->m_page.autoFoldFirstComment->text()
+          << ' ' << m_d->m_page.centerOnScroll->text();
         m_d->m_searchKeywords.remove(QLatin1Char('&'));
     }
     return w;
@@ -119,6 +120,7 @@ void DisplaySettingsPage::settingsFromUI(DisplaySettings &displaySettings) const
     displaySettings.m_animateMatchingParentheses = m_d->m_page.animateMatchingParentheses->isChecked();
     displaySettings.m_markTextChanges = m_d->m_page.markTextChanges->isChecked();
     displaySettings.m_autoFoldFirstComment = m_d->m_page.autoFoldFirstComment->isChecked();
+    displaySettings.m_centerCursorOnScroll = m_d->m_page.centerOnScroll->isChecked();
 }
 
 void DisplaySettingsPage::settingsToUI()
@@ -135,6 +137,7 @@ void DisplaySettingsPage::settingsToUI()
     m_d->m_page.animateMatchingParentheses->setChecked(displaySettings.m_animateMatchingParentheses);
     m_d->m_page.markTextChanges->setChecked(displaySettings.m_markTextChanges);
     m_d->m_page.autoFoldFirstComment->setChecked(displaySettings.m_autoFoldFirstComment);
+    m_d->m_page.centerOnScroll->setChecked(displaySettings.m_centerCursorOnScroll);
 }
 
 const DisplaySettings &DisplaySettingsPage::displaySettings() const

src/plugins/texteditor/displaysettingspage.ui

@@ -89,6 +89,13 @@
         </property>
        </widget>
       </item>
+      <item row="5" column="0">
+       <widget class="QCheckBox" name="centerOnScroll">
+        <property name="text">
+         <string>Center &amp;cursor on scroll</string>
+        </property>
+       </widget>
+      </item>
      </layout>
     </widget>
    </item>