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      1 /*
      2  * Copyright (C) 2009 Holger Hans Peter Freyther
      3  *
      4  * This library is free software; you can redistribute it and/or
      5  * modify it under the terms of the GNU Library General Public
      6  * License as published by the Free Software Foundation; either
      7  * version 2 of the License, or (at your option) any later version.
      8  *
      9  * This library is distributed in the hope that it will be useful,
     10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     12  * Library General Public License for more details.
     13  *
     14  * You should have received a copy of the GNU Library General Public License
     15  * along with this library; see the file COPYING.LIB.  If not, write to
     16  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     17  * Boston, MA 02110-1301, USA.
     18  */
     19 
     20 #include <QtTest/QtTest>
     21 
     22 #include <qwebelement.h>
     23 #include <qwebframe.h>
     24 #include <qwebview.h>
     25 #include <qpainter.h>
     26 
     27 /**
     28  * Starts an event loop that runs until the given signal is received.
     29  Optionally the event loop
     30  * can return earlier on a timeout.
     31  *
     32  * \return \p true if the requested signal was received
     33  *         \p false on timeout
     34  */
     35 static bool waitForSignal(QObject* obj, const char* signal, int timeout = 0)
     36 {
     37     QEventLoop loop;
     38     QObject::connect(obj, signal, &loop, SLOT(quit()));
     39     QTimer timer;
     40     QSignalSpy timeoutSpy(&timer, SIGNAL(timeout()));
     41     if (timeout > 0) {
     42         QObject::connect(&timer, SIGNAL(timeout()), &loop, SLOT(quit()));
     43         timer.setSingleShot(true);
     44         timer.start(timeout);
     45     }
     46     loop.exec();
     47     return timeoutSpy.isEmpty();
     48 }
     49 
     50 class tst_Painting : public QObject
     51 {
     52     Q_OBJECT
     53 
     54 public:
     55 
     56 public Q_SLOTS:
     57     void init();
     58     void cleanup();
     59 
     60 private Q_SLOTS:
     61     void paint_data();
     62     void paint();
     63     void textAreas();
     64 
     65 private:
     66     QWebView* m_view;
     67     QWebPage* m_page;
     68 };
     69 
     70 void tst_Painting::init()
     71 {
     72     m_view = new QWebView;
     73     m_page = m_view->page();
     74 
     75     QSize viewportSize(1024, 768);
     76     m_view->setFixedSize(viewportSize);
     77     m_page->setViewportSize(viewportSize);
     78 }
     79 
     80 void tst_Painting::cleanup()
     81 {
     82     delete m_view;
     83 }
     84 
     85 void tst_Painting::paint_data()
     86 {
     87     QTest::addColumn<QUrl>("url");
     88     QTest::newRow("amazon") << QUrl("http://www.amazon.com");
     89 }
     90 
     91 void tst_Painting::paint()
     92 {
     93     QFETCH(QUrl, url);
     94 
     95     m_view->load(url);
     96     ::waitForSignal(m_view, SIGNAL(loadFinished(bool)));
     97 
     98     /* force a layout */
     99     QWebFrame* mainFrame = m_page->mainFrame();
    100     mainFrame->toPlainText();
    101 
    102     QPixmap pixmap(m_page->viewportSize());
    103     QBENCHMARK {
    104         QPainter painter(&pixmap);
    105         mainFrame->render(&painter, QRect(QPoint(0, 0), m_page->viewportSize()));
    106         painter.end();
    107     }
    108 }
    109 
    110 void tst_Painting::textAreas()
    111 {
    112     m_view->load(QUrl("data:text/html;<html><body></body></html>"));
    113     ::waitForSignal(m_view, SIGNAL(loadFinished(bool)));
    114 
    115     QWebElement bodyElement = m_page->mainFrame()->findFirstElement("body");
    116 
    117     int count = 100;
    118     while (count--) {
    119         QString markup("<textarea cols='1' rows='1'></textarea>");
    120         bodyElement.appendInside(markup);
    121     }
    122 
    123     /* force a layout */
    124     QWebFrame* mainFrame = m_page->mainFrame();
    125     mainFrame->toPlainText();
    126 
    127     QPixmap pixmap(mainFrame->contentsSize());
    128     QBENCHMARK {
    129         QPainter painter(&pixmap);
    130         mainFrame->render(&painter, QRect(QPoint(0, 0), mainFrame->contentsSize()));
    131         painter.end();
    132     }
    133 }
    134 
    135 QTEST_MAIN(tst_Painting)
    136 #include "tst_painting.moc"
    137