QmlJS: Move parts of the indenter to the new LineInfo.

LineInfo can tell whether lines are finished or not.

Done-with: Erik Verbruggen

1 files changed, 126 insertions, 0 deletions

diff --git a/src/libs/qmljs/qmljslineinfo.h b/src/libs/qmljs/qmljslineinfo.h
new file mode 100644
index 0000000000..2112e313f0
--- /dev/null
+++ b/src/libs/qmljs/qmljslineinfo.h
@@ -0,0 +1,126 @@
+/**************************************************************************
+**
+** 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.
+**
+**************************************************************************/
+
+#ifndef QMLJSLINEINFO_H
+#define QMLJSLINEINFO_H
+
+#include <qmljs/qmljs_global.h>
+#include <qmljs/qmljsscanner.h>
+
+#include <QtCore/QRegExp>
+#include <QtCore/QStringList>
+#include <QtGui/QTextBlock>
+#include <QtGui/QTextCursor>
+
+namespace QmlJS {
+
+class QMLJS_EXPORT LineInfo
+{
+    Q_DISABLE_COPY(LineInfo)
+
+public:
+    LineInfo();
+    virtual ~LineInfo();
+
+    bool isUnfinishedLine();
+    bool isContinuationLine();
+
+    void initialize(QTextBlock begin, QTextBlock end);
+
+protected:
+    static const int SmallRoof;
+    static const int BigRoof;
+
+    QString trimmedCodeLine(const QString &t);
+    QChar firstNonWhiteSpace(const QString &t) const;
+
+    bool hasUnclosedParenOrBracket() const;
+
+    /*
+        The "linizer" is a group of functions and variables to iterate
+        through the source code of the program to indent. The program is
+        given as a list of strings, with the bottom line being the line
+        to indent. The actual program might contain extra lines, but
+        those are uninteresting and not passed over to us.
+    */
+
+    bool readLine();
+    void startLinizer();
+    bool bottomLineStartsInMultilineComment();
+    bool matchBracelessControlStatement();
+
+    Token lastToken() const;
+    QStringRef tokenText(const Token &token) const;
+
+protected:
+    struct LinizerState
+    {
+        LinizerState()
+            : braceDepth(0),
+              leftBraceFollows(false),
+              pendingRightBrace(false)
+        { }
+
+        int braceDepth;
+        bool leftBraceFollows;
+        bool pendingRightBrace;
+        QString line;
+        QList<Token> tokens;
+        QTextBlock iter;
+    };
+
+    class Program
+    {
+    public:
+        Program() {}
+        Program(QTextBlock begin, QTextBlock end)
+            : begin(begin), end(end) {}
+
+        QTextBlock firstBlock() const { return begin; }
+        QTextBlock lastBlock() const { return end; }
+
+    private:
+        QTextBlock begin, end;
+    };
+
+    Program yyProgram;
+    LinizerState yyLinizerState;
+
+    // shorthands
+    const QString *yyLine;
+    const int *yyBraceDepth;
+    const bool *yyLeftBraceFollows;
+
+    QRegExp braceX;
+};
+
+} // namespace QmlJS
+
+#endif // QMLJSLINEINFO_H
+