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/****************************************************************************
**
** Copyright (C) 2011 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) {
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) {
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
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