1 files changed, 131 insertions, 0 deletions
diff --git a/src/libs/cplusplus/MatchingText.cpp b/src/libs/cplusplus/MatchingText.cpp
new file mode 100644
index 0000000000..14449584d1
--- /dev/null
+++ b/src/libs/cplusplus/MatchingText.cpp
@@ -0,0 +1,131 @@
+/**************************************************************************
+**
+** This file is part of Qt Creator
+**
+** Copyright (c) 2009 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 "MatchingText.h"
+#include "BackwardsScanner.h"
+
+#include <Token.h>
+#include <QtDebug>
+
+using namespace CPlusPlus;
+
+MatchingText::MatchingText()
+{ }
+
+QString MatchingText::insertParagraphSeparator(const QTextCursor &tc) const
+{
+    BackwardsScanner tk(tc, 400);
+    int index = tk.startToken();
+
+    if (tk[index - 1].isNot(T_LBRACE))
+        return QString(); // nothing to do.
+
+    --index; // consume the `{'
+
+    const SimpleToken &token = tk[index - 1];
+
+    if (token.is(T_STRING_LITERAL) && tk[index - 2].is(T_EXTERN)) {
+        // recognized extern "C"
+        return QLatin1String("}");
+
+    } else if (token.is(T_IDENTIFIER)) {
+        int i = index - 1;
+
+        forever {
+            const SimpleToken &current = tk[i - 1];
+
+            if (current.is(T_EOF_SYMBOL))
+                break;
+
+            else if (current.is(T_CLASS) || current.is(T_STRUCT) || current.is(T_UNION))
+                return QLatin1String("};"); // found a class key.
+
+            else if (current.is(T_NAMESPACE))
+                return QLatin1String("}"); // found a namespace declaration
+
+            else if (current.is(T_SEMICOLON))
+                break; // found the `;' sync token
+
+            else if (current.is(T_LBRACE) || current.is(T_RBRACE))
+                break; // braces are considered sync tokens
+
+            else if (current.is(T_LPAREN) || current.is(T_RPAREN))
+                break; // sync token
+
+            else if (current.is(T_LBRACKET) || current.is(T_RBRACKET))
+                break; // sync token
+
+            --i;
+        }
+    }
+
+    if (token.is(T_NAMESPACE)) {
+        // anonymous namespace
+        return QLatin1String("}");
+
+    } else if (token.is(T_CLASS) || token.is(T_STRUCT) || token.is(T_UNION)) {
+        if (tk[index - 2].is(T_TYPEDEF)) {
+            // recognized:
+            //   typedef struct {
+            //
+            // in this case we don't want to insert the extra semicolon+newline.
+            return QLatin1String("}");
+        }
+
+        // anonymous class
+        return QLatin1String("};");
+
+    } else if (token.is(T_RPAREN)) {
+        // search the matching brace.
+        const int lparenIndex = tk.startOfMatchingBrace(index);
+
+        if (lparenIndex == index) {
+            // found an unmatched brace. We don't really know to do in this case.
+            return QString();
+        }
+
+        // look at the token before the matched brace
+        const SimpleToken &tokenBeforeBrace = tk[lparenIndex - 1];
+
+        if (tokenBeforeBrace.is(T_IF)) {
+            // recognized an if statement
+            return QLatin1String("}");
+
+        } else if (tokenBeforeBrace.is(T_FOR) || tokenBeforeBrace.is(T_WHILE)) {
+            // recognized a for-like statement
+            return QLatin1String("}");
+
+        }
+
+        // if we reached this point there is a good chance that we are parsing a function definition
+        return QLatin1String("}");
+    }
+
+    // match the block
+    return QLatin1String("}");
+}