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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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