/****************************************************************************+
−
**+
−
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).+
−
** All rights reserved.+
−
** Contact: Nokia Corporation (qt-info@nokia.com)+
−
**+
−
** This file is part of the QtGui module 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 Technology Preview License Agreement accompanying+
−
** this package.+
−
**+
−
** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
−
**+
−
** If you have questions regarding the use of this file, please contact+
−
** Nokia at qt-info@nokia.com.+
−
**+
−
**+
−
**+
−
**+
−
**+
−
**+
−
**+
−
**+
−
** $QT_END_LICENSE$+
−
**+
−
****************************************************************************/+
−
+
−
+
−
#include "qtextimagehandler_p.h"+
−
+
−
#include <qapplication.h>+
−
#include <qtextformat.h>+
−
#include <qpainter.h>+
−
#include <qdebug.h>+
−
#include <private/qtextengine_p.h>+
−
#include <qpalette.h>+
−
#include <qtextbrowser.h>+
−
#include <qthread.h>+
−
+
−
QT_BEGIN_NAMESPACE+
−
+
−
// set by the mime source factory in Qt3Compat+
−
QTextImageHandler::ExternalImageLoaderFunction QTextImageHandler::externalLoader = 0;+
−
+
−
static QPixmap getPixmap(QTextDocument *doc, const QTextImageFormat &format)+
−
{+
−
    QPixmap pm;+
−
+
−
    QString name = format.name();+
−
    if (name.startsWith(QLatin1String(":/"))) // auto-detect resources+
−
        name.prepend(QLatin1String("qrc"));+
−
    QUrl url = QUrl::fromEncoded(name.toUtf8());+
−
    const QVariant data = doc->resource(QTextDocument::ImageResource, url);+
−
    if (data.type() == QVariant::Pixmap || data.type() == QVariant::Image) {+
−
        pm = qvariant_cast<QPixmap>(data);+
−
    } else if (data.type() == QVariant::ByteArray) {+
−
        pm.loadFromData(data.toByteArray());+
−
    }+
−
+
−
    if (pm.isNull()) {+
−
        QString context;+
−
#ifndef QT_NO_TEXTBROWSER+
−
        QTextBrowser *browser = qobject_cast<QTextBrowser *>(doc->parent());+
−
        if (browser)+
−
            context = browser->source().toString();+
−
#endif+
−
        QImage img;+
−
        if (QTextImageHandler::externalLoader)+
−
            img = QTextImageHandler::externalLoader(name, context);+
−
+
−
        if (img.isNull()) { // try direct loading+
−
            name = format.name(); // remove qrc:/ prefix again+
−
            if (name.isEmpty() || !img.load(name))+
−
                return QPixmap(QLatin1String(":/trolltech/styles/commonstyle/images/file-16.png"));+
−
        }+
−
        pm = QPixmap::fromImage(img);+
−
        doc->addResource(QTextDocument::ImageResource, url, pm);+
−
    }+
−
+
−
    return pm;+
−
}+
−
+
−
static QSize getPixmapSize(QTextDocument *doc, const QTextImageFormat &format)+
−
{+
−
    QPixmap pm;+
−
+
−
    const bool hasWidth = format.hasProperty(QTextFormat::ImageWidth);+
−
    const int width = qRound(format.width());+
−
    const bool hasHeight = format.hasProperty(QTextFormat::ImageHeight);+
−
    const int height = qRound(format.height());+
−
+
−
    QSize size(width, height);+
−
    if (!hasWidth || !hasHeight) {+
−
        pm = getPixmap(doc, format);+
−
        if (!hasWidth) {+
−
            if (!hasHeight)+
−
                size.setWidth(pm.width());+
−
            else+
−
                size.setWidth(qRound(height * (pm.width() / (qreal) pm.height())));+
−
        }+
−
        if (!hasHeight) {+
−
            if (!hasWidth)+
−
                size.setHeight(pm.height());+
−
            else+
−
                size.setHeight(qRound(width * (pm.height() / (qreal) pm.width())));+
−
        }+
−
    }+
−
+
−
    qreal scale = 1.0;+
−
    QPaintDevice *pdev = doc->documentLayout()->paintDevice();+
−
    if (pdev) {+
−
        Q_GUI_EXPORT extern int qt_defaultDpi();+
−
        if (pm.isNull())+
−
            pm = getPixmap(doc, format);+
−
        if (!pm.isNull())+
−
            scale = qreal(pdev->logicalDpiY()) / qreal(qt_defaultDpi());+
−
    }+
−
    size *= scale;+
−
+
−
    return size;+
−
}+
−
+
−
static QImage getImage(QTextDocument *doc, const QTextImageFormat &format)+
−
{+
−
    QImage image;+
−
+
−
    QString name = format.name();+
−
    if (name.startsWith(QLatin1String(":/"))) // auto-detect resources+
−
        name.prepend(QLatin1String("qrc"));+
−
    QUrl url = QUrl::fromEncoded(name.toUtf8());+
−
    const QVariant data = doc->resource(QTextDocument::ImageResource, url);+
−
    if (data.type() == QVariant::Image) {+
−
        image = qvariant_cast<QImage>(data);+
−
    } else if (data.type() == QVariant::ByteArray) {+
−
        image.loadFromData(data.toByteArray());+
−
    }+
−
+
−
    if (image.isNull()) {+
−
        QString context;+
−
#ifndef QT_NO_TEXTBROWSER+
−
        QTextBrowser *browser = qobject_cast<QTextBrowser *>(doc->parent());+
−
        if (browser)+
−
            context = browser->source().toString();+
−
#endif+
−
        if (QTextImageHandler::externalLoader)+
−
            image = QTextImageHandler::externalLoader(name, context);+
−
+
−
        if (image.isNull()) { // try direct loading+
−
            name = format.name(); // remove qrc:/ prefix again+
−
            if (name.isEmpty() || !image.load(name))+
−
                return QImage(QLatin1String(":/trolltech/styles/commonstyle/images/file-16.png"));+
−
        }+
−
        doc->addResource(QTextDocument::ImageResource, url, image);+
−
    }+
−
+
−
    return image;+
−
}+
−
+
−
static QSize getImageSize(QTextDocument *doc, const QTextImageFormat &format)+
−
{+
−
    QImage image;+
−
+
−
    const bool hasWidth = format.hasProperty(QTextFormat::ImageWidth);+
−
    const int width = qRound(format.width());+
−
    const bool hasHeight = format.hasProperty(QTextFormat::ImageHeight);+
−
    const int height = qRound(format.height());+
−
+
−
    QSize size(width, height);+
−
    if (!hasWidth || !hasHeight) {+
−
        image = getImage(doc, format);+
−
        if (!hasWidth)+
−
            size.setWidth(image.width());+
−
        if (!hasHeight)+
−
            size.setHeight(image.height());+
−
    }+
−
+
−
    qreal scale = 1.0;+
−
    QPaintDevice *pdev = doc->documentLayout()->paintDevice();+
−
    if (pdev) {+
−
        extern int qt_defaultDpi();+
−
        if (image.isNull())+
−
            image = getImage(doc, format);+
−
        if (!image.isNull())+
−
            scale = qreal(pdev->logicalDpiY()) / qreal(qt_defaultDpi());+
−
    }+
−
    size *= scale;+
−
+
−
    return size;+
−
}+
−
+
−
QTextImageHandler::QTextImageHandler(QObject *parent)+
−
    : QObject(parent)+
−
{+
−
}+
−
+
−
QSizeF QTextImageHandler::intrinsicSize(QTextDocument *doc, int posInDocument, const QTextFormat &format)+
−
{+
−
    Q_UNUSED(posInDocument)+
−
    const QTextImageFormat imageFormat = format.toImageFormat();+
−
+
−
    if (qApp->thread() != QThread::currentThread())+
−
        return getImageSize(doc, imageFormat);+
−
    return getPixmapSize(doc, imageFormat);+
−
}+
−
+
−
void QTextImageHandler::drawObject(QPainter *p, const QRectF &rect, QTextDocument *doc, int posInDocument, const QTextFormat &format)+
−
{+
−
    Q_UNUSED(posInDocument)+
−
        const QTextImageFormat imageFormat = format.toImageFormat();+
−
+
−
    if (qApp->thread() != QThread::currentThread()) {+
−
        const QImage image = getImage(doc, imageFormat);+
−
        p->drawImage(rect, image, image.rect());+
−
    } else {+
−
        const QPixmap pixmap = getPixmap(doc, imageFormat);+
−
        p->drawPixmap(rect, pixmap, pixmap.rect());+
−
    }+
−
}+
−
+
−
QT_END_NAMESPACE+
−