Editors: Refactor auto-complete code out of the editors for better reusability.

Reviewed-by: Thorbjorn Lindeijer

src/plugins/cppeditor/cppautocompleter.cpp

@@ -0,0 +1,138 @@
+/**************************************************************************
+**
+** This file is part of Qt Creator
+**
+** Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
+**
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** Commercial Usage
+**
+** Licensees holding valid Qt Commercial licenses may use this file in
+** accordance with the Qt Commercial License Agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Nokia.
+**
+** 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.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at http://qt.nokia.com/contact.
+**
+**************************************************************************/
+
+#include "cppautocompleter.h"
+
+#include <Token.h>
+
+#include <cplusplus/SimpleLexer.h>
+#include <cplusplus/MatchingText.h>
+#include <cplusplus/BackwardsScanner.h>
+
+#include <QtCore/QLatin1Char>
+#include <QtGui/QTextCursor>
+
+using namespace CppEditor;
+using namespace Internal;
+using namespace CPlusPlus;
+
+CppAutoCompleter::CppAutoCompleter()
+{}
+
+CppAutoCompleter::~CppAutoCompleter()
+{}
+
+bool CppAutoCompleter::doContextAllowsAutoParentheses(const QTextCursor &cursor,
+                                                      const QString &textToInsert) const
+{
+    QChar ch;
+
+    if (! textToInsert.isEmpty())
+        ch = textToInsert.at(0);
+
+    if (! (MatchingText::shouldInsertMatchingText(cursor)
+           || ch == QLatin1Char('\'')
+           || ch == QLatin1Char('"')))
+        return false;
+    else if (isInComment(cursor))
+        return false;
+
+    return true;
+}
+
+bool CppAutoCompleter::doContextAllowsElectricCharacters(const QTextCursor &cursor) const
+{
+    const Token tk = SimpleLexer::tokenAt(cursor.block().text(), cursor.positionInBlock(),
+                                          BackwardsScanner::previousBlockState(cursor.block()));
+
+    // XXX Duplicated from CPPEditor::isInComment to avoid tokenizing twice
+    if (tk.isComment()) {
+        const unsigned pos = cursor.selectionEnd() - cursor.block().position();
+
+        if (pos == tk.end()) {
+            if (tk.is(T_CPP_COMMENT) || tk.is(T_CPP_DOXY_COMMENT))
+                return false;
+
+            const int state = cursor.block().userState() & 0xFF;
+            if (state > 0)
+                return false;
+        }
+
+        if (pos < tk.end())
+            return false;
+    }
+    else if (tk.is(T_STRING_LITERAL) || tk.is(T_WIDE_STRING_LITERAL)
+        || tk.is(T_CHAR_LITERAL) || tk.is(T_WIDE_CHAR_LITERAL)) {
+
+        const unsigned pos = cursor.selectionEnd() - cursor.block().position();
+        if (pos <= tk.end())
+            return false;
+    }
+
+    return true;
+}
+
+bool CppAutoCompleter::doIsInComment(const QTextCursor &cursor) const
+{
+    const Token tk = SimpleLexer::tokenAt(cursor.block().text(), cursor.positionInBlock(),
+                                          BackwardsScanner::previousBlockState(cursor.block()));
+
+    if (tk.isComment()) {
+        const unsigned pos = cursor.selectionEnd() - cursor.block().position();
+
+        if (pos == tk.end()) {
+            if (tk.is(T_CPP_COMMENT) || tk.is(T_CPP_DOXY_COMMENT))
+                return true;
+
+            const int state = cursor.block().userState() & 0xFF;
+            if (state > 0)
+                return true;
+        }
+
+        if (pos < tk.end())
+            return true;
+    }
+
+    return false;
+}
+
+QString CppAutoCompleter::doInsertMatchingBrace(const QTextCursor &cursor,
+                                                const QString &text,
+                                                QChar la,
+                                                int *skippedChars) const
+{
+    MatchingText m;
+    return m.insertMatchingBrace(cursor, text, la, skippedChars);
+}
+
+QString CppAutoCompleter::doInsertParagraphSeparator(const QTextCursor &cursor) const
+{
+    MatchingText m;
+    return m.insertParagraphSeparator(cursor);
+}