Add QQuickFontMetrics.

This will be a private C++ type that is exposed to QtQuick 2.4 as
FontMetrics.

[ChangeLog][QtQuick] Added QQuickFontMetrics, which provides a subset
of QFontMetricsF's API.

Change-Id: Iac31e5a555bd8f1dc0904b8de0408e5f1a402b25
Reviewed-by: J-P Nurmi <jpnurmi@digia.com>
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@digia.com>

2 files changed, 160 insertions, 0 deletions

diff --git a/tests/auto/quick/qquickfontmetrics/qquickfontmetrics.pro b/tests/auto/quick/qquickfontmetrics/qquickfontmetrics.pro
new file mode 100644
index 0000000000..452dd70bd3
--- /dev/null
+++ b/tests/auto/quick/qquickfontmetrics/qquickfontmetrics.pro
@@ -0,0 +1,10 @@
+CONFIG += testcase
+TARGET = tst_quickfontmetrics
+osx:CONFIG -= app_bundle
+
+SOURCES += tst_quickfontmetrics.cpp
+
+CONFIG += parallel_test
+
+QT += core gui qml quick-private testlib
+DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0
diff --git a/tests/auto/quick/qquickfontmetrics/tst_quickfontmetrics.cpp b/tests/auto/quick/qquickfontmetrics/tst_quickfontmetrics.cpp
new file mode 100644
index 0000000000..5e64858955
--- /dev/null
+++ b/tests/auto/quick/qquickfontmetrics/tst_quickfontmetrics.cpp
@@ -0,0 +1,150 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the QtQml module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** 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, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, 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.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QFont>
+#include <QFontDatabase>
+#include <QString>
+#include <QtTest>
+#include <QCoreApplication>
+
+#include <QtQuick/private/qquickfontmetrics_p.h>
+
+#include <QFontMetricsF>
+
+class tst_QuickFontMetrics : public QObject
+{
+    Q_OBJECT
+
+public:
+    tst_QuickFontMetrics();
+
+private Q_SLOTS:
+    void properties();
+    void functions_data();
+    void functions();
+};
+
+tst_QuickFontMetrics::tst_QuickFontMetrics()
+{
+}
+
+void tst_QuickFontMetrics::properties()
+{
+    QStringList families = QFontDatabase().families().mid(0, 10);
+    QQuickFontMetrics metrics;
+
+    foreach (const QString &family, families) {
+        QFont font(family);
+        QFontMetricsF expected(font);
+
+        QSignalSpy spy(&metrics, SIGNAL(fontChanged(QFont)));
+        metrics.setFont(font);
+        QCOMPARE(spy.count(), 1);
+
+        QCOMPARE(metrics.ascent(), expected.ascent());
+        QCOMPARE(metrics.descent(), expected.descent());
+        QCOMPARE(metrics.height(), expected.height());
+        QCOMPARE(metrics.leading(), expected.leading());
+        QCOMPARE(metrics.lineSpacing(), expected.lineSpacing());
+        QCOMPARE(metrics.minimumLeftBearing(), expected.minLeftBearing());
+        QCOMPARE(metrics.minimumRightBearing(), expected.minRightBearing());
+        QCOMPARE(metrics.maximumCharacterWidth(), expected.maxWidth());
+        QCOMPARE(metrics.xHeight(), expected.xHeight());
+        QCOMPARE(metrics.averageCharacterWidth(), expected.averageCharWidth());
+        QCOMPARE(metrics.underlinePosition(), expected.underlinePos());
+        QCOMPARE(metrics.overlinePosition(), expected.overlinePos());
+        QCOMPARE(metrics.strikeOutPosition(), expected.strikeOutPos());
+        QCOMPARE(metrics.lineWidth(), expected.lineWidth());
+    }
+}
+
+Q_DECLARE_METATYPE(Qt::TextElideMode)
+
+void tst_QuickFontMetrics::functions_data()
+{
+    QTest::addColumn<QString>("text");
+    QTest::addColumn<Qt::TextElideMode>("mode");
+    QTest::addColumn<qreal>("width");
+    QTest::addColumn<int>("flags");
+
+    QStringList strings;
+    strings << QString()
+            << QString::fromLatin1("")
+            << QString::fromLatin1("0")
+            << QString::fromLatin1("@@@@@@@")
+            << QString::fromLatin1("Hello");
+
+    QVector<Qt::TextElideMode> elideModes;
+    elideModes << Qt::ElideLeft << Qt::ElideMiddle << Qt::ElideRight << Qt::ElideNone;
+
+    for (int stringIndex = 0; stringIndex < strings.size(); ++stringIndex) {
+        const QString string = strings.at(stringIndex);
+
+        for (int elideModeIndex = 0; elideModeIndex < elideModes.size(); ++elideModeIndex) {
+            Qt::TextElideMode elideMode = static_cast<Qt::TextElideMode>(elideModes.at(elideModeIndex));
+
+            for (qreal width = 0; width < 100; width += 20) {
+                const QString tag = QString::fromLatin1("string=%1, mode=%2, width=%3").arg(string).arg(elideMode).arg(width);
+                QTest::newRow(qPrintable(tag)) << QString() << elideMode << width << 0;
+            }
+        }
+    }
+}
+
+void tst_QuickFontMetrics::functions()
+{
+    QFETCH(QString, text);
+    QFETCH(Qt::TextElideMode, mode);
+    QFETCH(qreal, width);
+    QFETCH(int, flags);
+
+    QQuickFontMetrics metrics;
+    QFontMetricsF expected = QFontMetricsF(QFont());
+
+    QCOMPARE(metrics.elidedText(text, mode, width, flags), expected.elidedText(text, mode, width, flags));
+    QCOMPARE(metrics.advanceWidth(text), expected.width(text));
+    QCOMPARE(metrics.boundingRect(text), expected.boundingRect(text));
+    QCOMPARE(metrics.tightBoundingRect(text), expected.tightBoundingRect(text));
+}
+
+QTEST_MAIN(tst_QuickFontMetrics)
+
+#include "tst_quickfontmetrics.moc"