Long live Qt 4.5!

1 files changed, 234 insertions, 0 deletions

diff --git a/src/gui/text/qtextimagehandler.cpp b/src/gui/text/qtextimagehandler.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (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 either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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 1.0, 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.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@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) {
+        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