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qt5base-lts/tests/auto/gui/text/qfontmetrics/tst_qfontmetrics.cpp
Oswald Buddenhagen 882bf3475c expand tabs and related whitespace fixes in *.{cpp,h,qdoc} 
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Started-by: Thiago Macieira <thiago.macieira@intel.com>
Change-Id: I77bb84e71c63ce75e0709e5b94bee18e3ce6ab9e
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
2014-01-13 22:46:50 +01:00

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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the test suite 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 <QtTest/QtTest>
#include <qfont.h>
#include <qfontmetrics.h>
#include <qfontdatabase.h>
#include <private/qfontengine_p.h>
#include <qstringlist.h>
#include <qlist.h>
class tst_QFontMetrics : public QObject
{
Q_OBJECT
public:
tst_QFontMetrics();
virtual ~tst_QFontMetrics();
public slots:
void init();
void cleanup();
private slots:
void same();
void metrics();
void boundingRect();
void elidedText_data();
void elidedText();
void veryNarrowElidedText();
void averageCharWidth();
void bypassShaping();
void elidedMultiLength();
void elidedMultiLengthF();
void inFontUcs4();
void lineWidth();
};
tst_QFontMetrics::tst_QFontMetrics()
{
}
tst_QFontMetrics::~tst_QFontMetrics()
{
}
void tst_QFontMetrics::init()
{
}
void tst_QFontMetrics::cleanup()
{
}
void tst_QFontMetrics::same()
{
QFont font;
font.setBold(true);
QFontMetrics fm(font);
const QString text = QLatin1String("Some stupid STRING");
QCOMPARE(fm.size(0, text), fm.size(0, text)) ;
{
QImage image;
QFontMetrics fm2(font, &image);
QString text2 = QLatin1String("Foo Foo");
QCOMPARE(fm2.size(0, text2), fm2.size(0, text2)); //used to crash
}
{
QImage image;
QFontMetricsF fm3(font, &image);
QString text2 = QLatin1String("Foo Foo");
QCOMPARE(fm3.size(0, text2), fm3.size(0, text2)); //used to crash
}
}
void tst_QFontMetrics::metrics()
{
QFont font;
QFontDatabase fdb;
// Query the QFontDatabase for a specific font, store the
// result in family, style and size.
QStringList families = fdb.families();
if (families.isEmpty())
return;
QStringList::ConstIterator f_it, f_end = families.end();
for (f_it = families.begin(); f_it != f_end; ++f_it) {
const QString &family = *f_it;
QStringList styles = fdb.styles(family);
QStringList::ConstIterator s_it, s_end = styles.end();
for (s_it = styles.begin(); s_it != s_end; ++s_it) {
const QString &style = *s_it;
if (fdb.isSmoothlyScalable(family, style)) {
// smoothly scalable font... don't need to load every pointsize
font = fdb.font(family, style, 12);
QFontMetrics fontmetrics(font);
QCOMPARE(fontmetrics.ascent() + fontmetrics.descent(),
fontmetrics.height());
QCOMPARE(fontmetrics.height() + fontmetrics.leading(),
fontmetrics.lineSpacing());
} else {
QList<int> sizes = fdb.pointSizes(family, style);
QVERIFY(!sizes.isEmpty());
QList<int>::ConstIterator z_it, z_end = sizes.end();
for (z_it = sizes.begin(); z_it != z_end; ++z_it) {
const int size = *z_it;
// Initialize the font, and check if it is an exact match
font = fdb.font(family, style, size);
QFontMetrics fontmetrics(font);
QCOMPARE(fontmetrics.ascent() + fontmetrics.descent(),
fontmetrics.height());
QCOMPARE(fontmetrics.height() + fontmetrics.leading(),
fontmetrics.lineSpacing());
}
}
}
}
}
void tst_QFontMetrics::boundingRect()
{
QFont f;
f.setPointSize(24);
QFontMetrics fm(f);
QRect r = fm.boundingRect(QChar('Y'));
QVERIFY(r.top() < 0);
r = fm.boundingRect(QString("Y"));
QVERIFY(r.top() < 0);
}
void tst_QFontMetrics::elidedText_data()
{
QTest::addColumn<QFont>("font");
QTest::addColumn<QString>("text");
QTest::newRow("helvetica hello") << QFont("helvetica",10) << QString("hello") ;
QTest::newRow("helvetica hello &Bye") << QFont("helvetica",10) << QString("hello&Bye") ;
}
void tst_QFontMetrics::elidedText()
{
QFETCH(QFont, font);
QFETCH(QString, text);
QFontMetrics fm(font);
int w = fm.width(text);
QString newtext = fm.elidedText(text,Qt::ElideRight,w+1, 0);
QCOMPARE(text,newtext); // should not elide
newtext = fm.elidedText(text,Qt::ElideRight,w-1, 0);
QVERIFY(text != newtext); // should elide
}
void tst_QFontMetrics::veryNarrowElidedText()
{
QFont f;
QFontMetrics fm(f);
QString text("hello");
QCOMPARE(fm.elidedText(text, Qt::ElideRight, 0), QString());
}
void tst_QFontMetrics::averageCharWidth()
{
QFont f;
QFontMetrics fm(f);
QVERIFY(fm.averageCharWidth() != 0);
QFontMetricsF fmf(f);
QVERIFY(fmf.averageCharWidth() != 0);
}
void tst_QFontMetrics::bypassShaping()
{
QFont f;
f.setStyleStrategy(QFont::ForceIntegerMetrics);
QFontMetrics fm(f);
QString text = " A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z, a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x, y, z";
int textWidth = fm.width(text, -1, Qt::TextBypassShaping);
QVERIFY(textWidth != 0);
int charsWidth = 0;
for (int i = 0; i < text.size(); ++i)
charsWidth += fm.width(text[i]);
// This assertion is needed in Qt WebKit's WebCore::Font::offsetForPositionForSimpleText
QCOMPARE(textWidth, charsWidth);
}
template<class FontMetrics> void elidedMultiLength_helper()
{
QString text1 = QLatin1String("Long Text 1\x9cShorter\x9csmall");
QString text1_long = "Long Text 1";
QString text1_short = "Shorter";
QString text1_small = "small";
FontMetrics fm = FontMetrics(QFont());
int width_long = fm.size(0, text1_long).width();
QCOMPARE(fm.elidedText(text1,Qt::ElideRight, 8000), text1_long);
QCOMPARE(fm.elidedText(text1,Qt::ElideRight, width_long + 1), text1_long);
QCOMPARE(fm.elidedText(text1,Qt::ElideRight, width_long - 1), text1_short);
int width_short = fm.size(0, text1_short).width();
QCOMPARE(fm.elidedText(text1,Qt::ElideRight, width_short + 1), text1_short);
QCOMPARE(fm.elidedText(text1,Qt::ElideRight, width_short - 1), text1_small);
// Not even wide enough for "small" - should use ellipsis
QChar ellipsisChar(0x2026);
QString text1_el = QString::fromLatin1("s") + ellipsisChar;
int width_small = fm.width(text1_el);
QCOMPARE(fm.elidedText(text1,Qt::ElideRight, width_small + 1), text1_el);
}
void tst_QFontMetrics::elidedMultiLength()
{
elidedMultiLength_helper<QFontMetrics>();
}
void tst_QFontMetrics::elidedMultiLengthF()
{
elidedMultiLength_helper<QFontMetricsF>();
}
void tst_QFontMetrics::inFontUcs4()
{
int id = QFontDatabase::addApplicationFont(":/fonts/ucs4font.ttf");
QVERIFY(id >= 0);
QFont font("QtTestUcs4");
{
QFontMetrics fm(font);
QVERIFY(fm.inFontUcs4(0x1D7FF));
}
{
QFontMetricsF fm(font);
QVERIFY(fm.inFontUcs4(0x1D7FF));
}
{
QFontEngine *engine = QFontPrivate::get(font)->engineForScript(QChar::Script_Common);
QGlyphLayout glyphs;
glyphs.numGlyphs = 3;
uint buf[3];
glyphs.glyphs = buf;
QString string;
{
string.append(QChar::highSurrogate(0x1D7FF));
string.append(QChar::lowSurrogate(0x1D7FF));
glyphs.numGlyphs = 3;
glyphs.glyphs[0] = 0;
QVERIFY(engine->stringToCMap(string.constData(), string.size(),
&glyphs, &glyphs.numGlyphs,
QFontEngine::GlyphIndicesOnly));
QCOMPARE(glyphs.numGlyphs, 1);
QCOMPARE(glyphs.glyphs[0], uint(1));
}
{
string.clear();
string.append(QChar::ObjectReplacementCharacter);
glyphs.numGlyphs = 3;
glyphs.glyphs[0] = 0;
QVERIFY(engine->stringToCMap(string.constData(), string.size(),
&glyphs, &glyphs.numGlyphs,
QFontEngine::GlyphIndicesOnly));
QVERIFY(glyphs.glyphs[0] != 1);
}
}
QFontDatabase::removeApplicationFont(id);
}
void tst_QFontMetrics::lineWidth()
{
// QTBUG-13009, QTBUG-13011
QFont smallFont;
smallFont.setPointSize(8);
smallFont.setWeight(QFont::Light);
const QFontMetrics smallFontMetrics(smallFont);
QFont bigFont;
bigFont.setPointSize(40);
bigFont.setWeight(QFont::Black);
const QFontMetrics bigFontMetrics(bigFont);
QVERIFY(smallFontMetrics.lineWidth() >= 1);
QVERIFY(smallFontMetrics.lineWidth() < bigFontMetrics.lineWidth());
}
QTEST_MAIN(tst_QFontMetrics)
#include "tst_qfontmetrics.moc"
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