Long live Qt 4.5!

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diff --git a/tests/auto/qsyntaxhighlighter/tst_qsyntaxhighlighter.cpp b/tests/auto/qsyntaxhighlighter/tst_qsyntaxhighlighter.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+
+#include <QtTest/QtTest>
+#include <QTextDocument>
+#include <QTextLayout>
+#include <QDebug>
+#include <QAbstractTextDocumentLayout>
+#include <QSyntaxHighlighter>
+
+//TESTED_CLASS=
+//TESTED_FILES=
+//
+class QTestDocumentLayout : public QAbstractTextDocumentLayout
+{
+    Q_OBJECT
+public:
+    inline QTestDocumentLayout(QTextDocument *doc)
+        : QAbstractTextDocumentLayout(doc), documentChangedCalled(false) {}
+
+        virtual void draw(QPainter *, const QAbstractTextDocumentLayout::PaintContext &)  {}
+
+        virtual int hitTest(const QPointF &, Qt::HitTestAccuracy ) const { return 0; }
+
+        virtual void documentChanged(int, int, int) { documentChangedCalled = true; }
+
+        virtual int pageCount() const { return 1; }
+
+        virtual QSizeF documentSize() const { return QSize(); }
+
+        virtual QRectF frameBoundingRect(QTextFrame *) const { return QRectF(); }
+        virtual QRectF blockBoundingRect(const QTextBlock &) const { return QRectF(); }
+
+        bool documentChangedCalled;
+};
+
+class tst_QSyntaxHighlighter : public QObject
+{
+    Q_OBJECT
+public:
+    inline tst_QSyntaxHighlighter() {}
+
+public slots:
+    void init();
+    void cleanup();
+
+private slots:
+    void basic();
+    void basicTwo();
+    void removeFormatsOnDelete();
+    void emptyBlocks();
+    void setCharFormat();
+    void highlightOnInit();
+    void stopHighlightingWhenStateDoesNotChange();
+    void unindent();
+    void highlightToEndOfDocument();
+    void highlightToEndOfDocument2();
+    void preservePreeditArea();
+    void task108530();
+    void avoidUnnecessaryRehighlight();
+    void noContentsChangedDuringHighlight();
+    void rehighlight();
+
+private:
+    QTextDocument *doc;
+    QTestDocumentLayout *lout;
+    QTextCursor cursor;
+};
+
+void tst_QSyntaxHighlighter::init()
+{
+    doc = new QTextDocument;
+    lout = new QTestDocumentLayout(doc);
+    doc->setDocumentLayout(lout);
+    cursor = QTextCursor(doc);
+}
+
+void tst_QSyntaxHighlighter::cleanup()
+{
+    delete doc;
+    doc = 0;
+}
+
+class TestHighlighter : public QSyntaxHighlighter
+{
+public:
+    inline TestHighlighter(const QList<QTextLayout::FormatRange> &fmts, QTextDocument *parent)
+        : QSyntaxHighlighter(parent), formats(fmts), highlighted(false), callCount(0) {}
+        inline TestHighlighter(QTextDocument *parent)
+            : QSyntaxHighlighter(parent), highlighted(false), callCount(0) {}
+
+            virtual void highlightBlock(const QString &text)
+            {
+                for (int i = 0; i < formats.count(); ++i) {
+                    const QTextLayout::FormatRange &range = formats.at(i);
+                    setFormat(range.start, range.length, range.format);
+                }
+                highlighted = true;
+                highlightedText += text;
+                ++callCount;
+            }
+
+            QList<QTextLayout::FormatRange> formats;
+            bool highlighted;
+            int callCount;
+            QString highlightedText;
+};
+
+QT_BEGIN_NAMESPACE
+static bool operator==(const QTextLayout::FormatRange &lhs, const QTextLayout::FormatRange &rhs)
+{
+    return lhs.start == rhs.start
+        && lhs.length == rhs.length
+        && lhs.format == rhs.format;
+}
+QT_END_NAMESPACE
+
+void tst_QSyntaxHighlighter::basic()
+{
+    QList<QTextLayout::FormatRange> formats;
+    QTextLayout::FormatRange range;
+    range.start = 0;
+    range.length = 2;
+    range.format.setForeground(Qt::blue);
+    formats.append(range);
+
+    range.start = 4;
+    range.length = 2;
+    range.format.setFontItalic(true);
+    formats.append(range);
+
+    range.start = 9;
+    range.length = 2;
+    range.format.setFontUnderline(true);
+    formats.append(range);
+
+    TestHighlighter *hl = new TestHighlighter(formats, doc);
+
+    lout->documentChangedCalled = false;
+    doc->setPlainText("Hello World");
+    QVERIFY(hl->highlighted);
+    QVERIFY(lout->documentChangedCalled);
+
+    QVERIFY(doc->begin().layout()->additionalFormats() == formats);
+}
+
+class CommentTestHighlighter : public QSyntaxHighlighter
+{
+public:
+    inline CommentTestHighlighter(QTextDocument *parent)
+        : QSyntaxHighlighter(parent), highlighted(false) {}
+
+        inline void reset()
+        {
+            highlighted = false;
+        }
+
+        virtual void highlightBlock(const QString &text)
+        {
+            QTextCharFormat commentFormat;
+            commentFormat.setForeground(Qt::darkGreen);
+            commentFormat.setFontWeight(QFont::StyleItalic);
+            commentFormat.setFontFixedPitch(true);
+            int textLength = text.length();
+
+            if (text.startsWith(QLatin1Char(';'))){
+                // The entire line is a comment
+                setFormat(0, textLength, commentFormat);
+                highlighted = true;
+            }
+        }
+        bool highlighted;
+};
+
+
+void tst_QSyntaxHighlighter::basicTwo()
+{
+    // Done for task 104409
+    CommentTestHighlighter *hl = new CommentTestHighlighter(doc);
+    doc->setPlainText("; a test");
+    QVERIFY(hl->highlighted);
+    QVERIFY(lout->documentChangedCalled);
+}
+
+void tst_QSyntaxHighlighter::removeFormatsOnDelete()
+{
+    QList<QTextLayout::FormatRange> formats;
+    QTextLayout::FormatRange range;
+    range.start = 0;
+    range.length = 9;
+    range.format.setForeground(Qt::blue);
+    formats.append(range);
+
+    TestHighlighter *hl = new TestHighlighter(formats, doc);
+
+    lout->documentChangedCalled = false;
+    doc->setPlainText("Hello World");
+    QVERIFY(hl->highlighted);
+    QVERIFY(lout->documentChangedCalled);
+
+    lout->documentChangedCalled = false;
+    QVERIFY(!doc->begin().layout()->additionalFormats().isEmpty());
+    delete hl;
+    QVERIFY(doc->begin().layout()->additionalFormats().isEmpty());
+    QVERIFY(lout->documentChangedCalled);
+}
+
+void tst_QSyntaxHighlighter::emptyBlocks()
+{
+    TestHighlighter *hl = new TestHighlighter(doc);
+
+    cursor.insertText("Foo");
+    cursor.insertBlock();
+    cursor.insertBlock();
+    hl->highlighted = false;
+    cursor.insertBlock();
+    QVERIFY(hl->highlighted);
+}
+
+void tst_QSyntaxHighlighter::setCharFormat()
+{
+    TestHighlighter *hl = new TestHighlighter(doc);
+
+    cursor.insertText("FooBar");
+    cursor.insertBlock();
+    cursor.insertText("Blah");
+    cursor.movePosition(QTextCursor::Start);
+    cursor.movePosition(QTextCursor::End, QTextCursor::KeepAnchor);
+    QTextCharFormat fmt;
+    fmt.setFontItalic(true);
+    hl->highlighted = false;
+    hl->callCount = 0;
+    cursor.mergeCharFormat(fmt);
+    QVERIFY(hl->highlighted);
+    QCOMPARE(hl->callCount, 2);
+}
+
+void tst_QSyntaxHighlighter::highlightOnInit()
+{
+    cursor.insertText("Hello");
+    cursor.insertBlock();
+    cursor.insertText("World");
+
+    TestHighlighter *hl = new TestHighlighter(doc);
+    QTest::qWait(100);
+    QVERIFY(hl->highlighted);
+}
+
+class StateTestHighlighter : public QSyntaxHighlighter
+{
+public:
+    inline StateTestHighlighter(QTextDocument *parent)
+        : QSyntaxHighlighter(parent), state(0), highlighted(false) {}
+
+        inline void reset()
+        {
+            highlighted = false;
+            state = 0;
+        }
+
+        virtual void highlightBlock(const QString &text)
+        {
+            highlighted = true;
+            if (text == QLatin1String("changestate"))
+                setCurrentBlockState(state++);
+        }
+
+        int state;
+        bool highlighted;
+};
+
+void tst_QSyntaxHighlighter::stopHighlightingWhenStateDoesNotChange()
+{
+    cursor.insertText("state");
+    cursor.insertBlock();
+    cursor.insertText("changestate");
+    cursor.insertBlock();
+    cursor.insertText("keepstate");
+    cursor.insertBlock();
+    cursor.insertText("changestate");
+    cursor.insertBlock();
+    cursor.insertText("changestate");
+
+    StateTestHighlighter *hl = new StateTestHighlighter(doc);
+    QTest::qWait(100);
+    QVERIFY(hl->highlighted);
+
+    hl->reset();
+
+    // turn the text of the first block into 'changestate'
+    cursor.movePosition(QTextCursor::Start);
+    cursor.insertText("change");
+
+    // verify that we highlighted only to the 'keepstate' block,
+    // not beyond
+    QCOMPARE(hl->state, 2);
+}
+
+void tst_QSyntaxHighlighter::unindent()
+{
+    const QString spaces("    ");
+    const QString text("Foobar");
+    QString plainText;
+    for (int i = 0; i < 5; ++i) {
+        cursor.insertText(spaces + text);
+        cursor.insertBlock();
+
+        plainText += spaces;
+        plainText += text;
+        plainText += QLatin1Char('\n');
+    }
+    QCOMPARE(doc->toPlainText(), plainText);
+
+    TestHighlighter *hl = new TestHighlighter(doc);
+    hl->callCount = 0;
+
+    cursor.movePosition(QTextCursor::Start);
+    cursor.beginEditBlock();
+
+    plainText.clear();
+    for (int i = 0; i < 5; ++i) {
+        cursor.movePosition(QTextCursor::NextCharacter, QTextCursor::KeepAnchor, 4);
+        cursor.removeSelectedText();
+        cursor.movePosition(QTextCursor::NextBlock);
+
+        plainText += text;
+        plainText += QLatin1Char('\n');
+    }
+
+    cursor.endEditBlock();
+    QCOMPARE(doc->toPlainText(), plainText);
+    QCOMPARE(hl->callCount, 5);
+}
+
+void tst_QSyntaxHighlighter::highlightToEndOfDocument()
+{
+    TestHighlighter *hl = new TestHighlighter(doc);
+    hl->callCount = 0;
+
+    cursor.movePosition(QTextCursor::Start);
+    cursor.beginEditBlock();
+
+    cursor.insertText("Hello");
+    cursor.insertBlock();
+    cursor.insertBlock();
+    cursor.insertText("World");
+    cursor.insertBlock();
+
+    cursor.endEditBlock();
+
+    QCOMPARE(hl->callCount, 4);
+}
+
+void tst_QSyntaxHighlighter::highlightToEndOfDocument2()
+{
+    TestHighlighter *hl = new TestHighlighter(doc);
+    hl->callCount = 0;
+
+    cursor.movePosition(QTextCursor::End);
+    cursor.beginEditBlock();
+    QTextBlockFormat fmt;
+    fmt.setAlignment(Qt::AlignLeft);
+    cursor.setBlockFormat(fmt);
+    cursor.insertText("Three\nLines\nHere");
+    cursor.endEditBlock();
+
+    QCOMPARE(hl->callCount, 3);
+}
+
+void tst_QSyntaxHighlighter::preservePreeditArea()
+{
+    QList<QTextLayout::FormatRange> formats;
+    QTextLayout::FormatRange range;
+    range.start = 0;
+    range.length = 8;
+    range.format.setForeground(Qt::blue);
+    formats << range;
+    range.start = 9;
+    range.length = 1;
+    range.format.setForeground(Qt::red);
+    formats << range;
+    TestHighlighter *hl = new TestHighlighter(formats, doc);
+
+    doc->setPlainText("Hello World");
+    cursor.movePosition(QTextCursor::Start);
+
+    QTextLayout *layout = cursor.block().layout();
+
+    layout->setPreeditArea(5, QString("foo"));
+    range.start = 5;
+    range.length = 3;
+    range.format.setFontUnderline(true);
+    formats.clear();
+    formats << range;
+
+    hl->callCount = 0;
+
+    cursor.beginEditBlock();
+    layout->setAdditionalFormats(formats);
+    cursor.endEditBlock();
+
+    QCOMPARE(hl->callCount, 1);
+
+    formats = layout->additionalFormats();
+    QCOMPARE(formats.count(), 3);
+
+    range = formats.at(0);
+
+    QCOMPARE(range.start, 5);
+    QCOMPARE(range.length, 3);
+    QVERIFY(range.format.fontUnderline());
+
+    range = formats.at(1);
+    QCOMPARE(range.start, 0);
+    QCOMPARE(range.length, 8 + 3);
+
+    range = formats.at(2);
+    QCOMPARE(range.start, 9 + 3);
+    QCOMPARE(range.length, 1);
+}
+
+void tst_QSyntaxHighlighter::task108530()
+{
+    TestHighlighter *hl = new TestHighlighter(doc);
+
+    cursor.insertText("test");
+    hl->callCount = 0;
+    hl->highlightedText.clear();
+    cursor.movePosition(QTextCursor::Start);
+    cursor.insertBlock();
+
+    QCOMPARE(hl->highlightedText, QString("test"));
+    QCOMPARE(hl->callCount, 2);
+}
+
+void tst_QSyntaxHighlighter::avoidUnnecessaryRehighlight()
+{
+    TestHighlighter *hl = new TestHighlighter(doc);
+    QVERIFY(!hl->highlighted);
+
+    doc->setPlainText("Hello World");
+    QVERIFY(hl->highlighted);
+
+    hl->highlighted = false;
+    QTest::qWait(100);
+    QVERIFY(!hl->highlighted);
+}
+
+void tst_QSyntaxHighlighter::noContentsChangedDuringHighlight()
+{
+    QList<QTextLayout::FormatRange> formats;
+    QTextLayout::FormatRange range;
+    range.start = 0;
+    range.length = 10;
+    range.format.setForeground(Qt::blue);
+    formats.append(range);
+
+    TestHighlighter *hl = new TestHighlighter(formats, doc);
+
+    lout->documentChangedCalled = false;
+    QTextCursor cursor(doc);
+
+    QSignalSpy contentsChangedSpy(doc, SIGNAL(contentsChanged()));
+    cursor.insertText("Hello World");
+
+    QCOMPARE(contentsChangedSpy.count(), 1);
+    QVERIFY(hl->highlighted);
+    QVERIFY(lout->documentChangedCalled);
+}
+
+void tst_QSyntaxHighlighter::rehighlight()
+{
+    TestHighlighter *hl = new TestHighlighter(doc);
+    hl->callCount = 0;
+    doc->setPlainText("Hello");
+    hl->callCount = 0;
+    hl->rehighlight();
+    QCOMPARE(hl->callCount, 1);
+}
+
+
+QTEST_MAIN(tst_QSyntaxHighlighter)
+#include "tst_qsyntaxhighlighter.moc"