Disable bracket matching when automatic insertion is disabled

When automatic insertion of brackets is disabled in the completion
settings, it is reasonable to expect the automatic matching of brackets
is also disabled.

Task-number: QTCREATORBUG-454
Reviewed-by: Daniel Molkentin <daniel.molkentin@nokia.com>

src/plugins/texteditor/basetexteditor.cpp

@@ -34,6 +34,7 @@
 #include "basetexteditor_p.h"
 #include "behaviorsettings.h"
 #include "codecselector.h"
+#include "completionsettings.h"
 #include "completionsupport.h"
 #include "tabsettings.h"
 #include "texteditorconstants.h"
@@ -179,7 +180,7 @@ static void convertToPlainText(QString &txt)
 BaseTextEditor::BaseTextEditor(QWidget *parent)
     : QPlainTextEdit(parent)
 {
-    d = new BaseTextEditorPrivate();
+    d = new BaseTextEditorPrivate;
     d->q = this;
     d->m_extraArea = new TextEditExtraArea(this);
     d->m_extraArea->setMouseTracking(true);
@@ -195,8 +196,6 @@ BaseTextEditor::BaseTextEditor(QWidget *parent)
     d->m_lastScrollPos = -1;
     setCursorWidth(2);
 
-    d->m_allowSkippingOfBlockEnd = false;
-
     // from RESEARCH
 
     setLayoutDirection(Qt::LeftToRight);
@@ -221,7 +220,6 @@ BaseTextEditor::BaseTextEditor(QWidget *parent)
 
 
     // parentheses matcher
-    d->m_parenthesesMatchingEnabled = false;
     d->m_formatRange = true;
     d->m_matchFormat.setForeground(Qt::red);
     d->m_rangeFormat.setBackground(QColor(0xb4, 0xee, 0xb4));
@@ -1686,6 +1684,16 @@ bool BaseTextEditor::isParenthesesMatchingEnabled() const
     return d->m_parenthesesMatchingEnabled;
 }
 
+void BaseTextEditor::setAutoParenthesesEnabled(bool b)
+{
+    d->m_autoParenthesesEnabled = b;
+}
+
+bool BaseTextEditor::isAutoParenthesesEnabled() const
+{
+    return d->m_autoParenthesesEnabled;
+}
+
 void BaseTextEditor::setHighlightCurrentLine(bool b)
 {
     d->m_highlightCurrentLine = b;
@@ -1814,8 +1822,10 @@ BaseTextEditorPrivate::BaseTextEditorPrivate()
     :
     m_contentsChanged(false),
     m_lastCursorChangeWasInteresting(false),
-    m_document(new BaseTextDocument()),
+    m_allowSkippingOfBlockEnd(false),
+    m_document(new BaseTextDocument),
     m_parenthesesMatchingEnabled(false),
+    m_autoParenthesesEnabled(true),
     m_extraArea(0),
     m_mouseOnCollapsedMarker(false),
     m_marksVisible(false),
@@ -3866,13 +3876,16 @@ QString BaseTextEditor::autoComplete(QTextCursor &cursor, const QString &textToI
     const bool checkBlockEnd = d->m_allowSkippingOfBlockEnd;
     d->m_allowSkippingOfBlockEnd = false; // consume blockEnd.
 
+    if (!d->m_autoParenthesesEnabled)
+        return QString();
+
     if (!contextAllowsAutoParentheses(cursor, textToInsert))
         return QString();
 
     const QString text = textToInsert;
     const QChar lookAhead = characterAt(cursor.selectionEnd());
 
-    QChar character = textToInsert.at(0);
+    const QChar character = textToInsert.at(0);
     const QString parentheses = QLatin1String("()");
     const QString brackets = QLatin1String("[]");
     if (parentheses.contains(character) || brackets.contains(character)) {
@@ -3927,17 +3940,20 @@ bool BaseTextEditor::autoBackspace(QTextCursor &cursor)
 {
     d->m_allowSkippingOfBlockEnd = false;
 
+    if (!d->m_autoParenthesesEnabled)
+        return false;
+
     int pos = cursor.position();
     if (pos == 0)
         return false;
     QTextCursor c = cursor;
     c.setPosition(pos - 1);
 
-    QChar lookAhead = characterAt(pos);
-    QChar lookBehind = characterAt(pos-1);
-    QChar lookFurtherBehind = characterAt(pos-2);
+    const QChar lookAhead = characterAt(pos);
+    const QChar lookBehind = characterAt(pos - 1);
+    const QChar lookFurtherBehind = characterAt(pos - 2);
 
-    QChar character = lookBehind;
+    const QChar character = lookBehind;
     if (character == QLatin1Char('(') || character == QLatin1Char('[')) {
         QTextCursor tmp = cursor;
         TextEditor::TextBlockUserData::findPreviousBlockOpenParenthesis(&tmp);
@@ -3982,7 +3998,10 @@ bool BaseTextEditor::autoBackspace(QTextCursor &cursor)
 
 int BaseTextEditor::paragraphSeparatorAboutToBeInserted(QTextCursor &cursor)
 {
-    if (characterAt(cursor.position()-1) != QLatin1Char('{'))
+    if (!d->m_autoParenthesesEnabled)
+        return 0;
+
+    if (characterAt(cursor.position() - 1) != QLatin1Char('{'))
         return 0;
 
     if (!contextAllowsAutoParentheses(cursor))
@@ -4885,6 +4904,11 @@ void BaseTextEditor::setStorageSettings(const StorageSettings &storageSettings)
     d->m_document->setStorageSettings(storageSettings);
 }
 
+void BaseTextEditor::setCompletionSettings(const TextEditor::CompletionSettings &completionSettings)
+{
+    setAutoParenthesesEnabled(completionSettings.m_autoInsertBrackets);
+}
+
 void BaseTextEditor::collapse()
 {
     QTextDocument *doc = document();