mirror of
https://bitbucket.org/smil3y/katie.git
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227 lines
7.5 KiB
C++
227 lines
7.5 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Contact: http://www.qt.io/licensing/
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**
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** This file is part of the QtGui module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see http://www.qt.io/terms-conditions. For further
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** information use the contact form at http://www.qt.io/contact-us.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 or version 3 as published by the Free
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** Software Foundation and appearing in the file LICENSE.LGPLv21 and
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** LICENSE.LGPLv3 included in the packaging of this file. Please review the
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** following information to ensure the GNU Lesser General Public License
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** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
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** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** As a special exception, The Qt Company gives you certain additional
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** rights. These rights are described in The Qt Company LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "qtextimagehandler_p.h"
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#include <qapplication.h>
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#include <qtextformat.h>
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#include <qpainter.h>
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#include <qdebug.h>
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#include <qtextengine_p.h>
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#include <qpalette.h>
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#include <qtextbrowser.h>
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#include <qthread.h>
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QT_BEGIN_NAMESPACE
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static QPixmap getPixmap(QTextDocument *doc, const QTextImageFormat &format)
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{
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QPixmap pm;
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QString name = format.name();
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if (name.startsWith(QLatin1String(":/"))) // auto-detect resources
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name.prepend(QLatin1String("qrc"));
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QUrl url = QUrl::fromEncoded(name.toUtf8());
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const QVariant data = doc->resource(QTextDocument::ImageResource, url);
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if (data.type() == QVariant::Pixmap || data.type() == QVariant::Image) {
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pm = qvariant_cast<QPixmap>(data);
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} else if (data.type() == QVariant::ByteArray) {
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pm.loadFromData(data.toByteArray());
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}
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if (pm.isNull()) {
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QString context;
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#ifndef QT_NO_TEXTBROWSER
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QTextBrowser *browser = qobject_cast<QTextBrowser *>(doc->parent());
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if (browser)
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context = browser->source().toString();
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#endif
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QImage img;
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// try direct loading
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name = format.name(); // remove qrc:/ prefix again
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if (name.isEmpty() || !img.load(name)) {
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return QPixmap(QLatin1String(":/trolltech/styles/commonstyle/images/file-16.png"));
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}
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pm = QPixmap::fromImage(img);
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doc->addResource(QTextDocument::ImageResource, url, pm);
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}
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return pm;
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}
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static QSize getPixmapSize(QTextDocument *doc, const QTextImageFormat &format)
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{
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QPixmap pm;
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const bool hasWidth = format.hasProperty(QTextFormat::ImageWidth);
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const int width = qRound(format.width());
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const bool hasHeight = format.hasProperty(QTextFormat::ImageHeight);
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const int height = qRound(format.height());
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QSize size(width, height);
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if (!hasWidth || !hasHeight) {
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pm = getPixmap(doc, format);
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if (!hasWidth) {
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if (!hasHeight)
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size.setWidth(pm.width());
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else
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size.setWidth(qRound(height * (pm.width() / (qreal) pm.height())));
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}
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if (!hasHeight) {
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if (!hasWidth)
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size.setHeight(pm.height());
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else
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size.setHeight(qRound(width * (pm.height() / (qreal) pm.width())));
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}
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}
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qreal scale = 1.0;
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QPaintDevice *pdev = doc->documentLayout()->paintDevice();
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if (pdev) {
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if (pm.isNull())
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pm = getPixmap(doc, format);
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if (!pm.isNull())
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scale = qreal(pdev->logicalDpiY()) / qreal(qt_defaultDpi());
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}
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size *= scale;
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return size;
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}
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static QImage getImage(QTextDocument *doc, const QTextImageFormat &format)
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{
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QImage image;
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QString name = format.name();
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if (name.startsWith(QLatin1String(":/"))) // auto-detect resources
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name.prepend(QLatin1String("qrc"));
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QUrl url = QUrl::fromEncoded(name.toUtf8());
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const QVariant data = doc->resource(QTextDocument::ImageResource, url);
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if (data.type() == QVariant::Image) {
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image = qvariant_cast<QImage>(data);
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} else if (data.type() == QVariant::ByteArray) {
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image.loadFromData(data.toByteArray());
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}
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if (image.isNull()) {
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QString context;
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#ifndef QT_NO_TEXTBROWSER
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QTextBrowser *browser = qobject_cast<QTextBrowser *>(doc->parent());
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if (browser)
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context = browser->source().toString();
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#endif
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// try direct loading
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name = format.name(); // remove qrc:/ prefix again
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if (name.isEmpty() || !image.load(name)) {
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return QImage(QLatin1String(":/trolltech/styles/commonstyle/images/file-16.png"));
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}
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doc->addResource(QTextDocument::ImageResource, url, image);
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}
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return image;
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}
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static QSize getImageSize(QTextDocument *doc, const QTextImageFormat &format)
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{
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QImage image;
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const bool hasWidth = format.hasProperty(QTextFormat::ImageWidth);
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const int width = qRound(format.width());
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const bool hasHeight = format.hasProperty(QTextFormat::ImageHeight);
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const int height = qRound(format.height());
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QSize size(width, height);
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if (!hasWidth || !hasHeight) {
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image = getImage(doc, format);
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if (!hasWidth)
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size.setWidth(image.width());
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if (!hasHeight)
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size.setHeight(image.height());
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}
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qreal scale = 1.0;
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QPaintDevice *pdev = doc->documentLayout()->paintDevice();
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if (pdev) {
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if (image.isNull())
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image = getImage(doc, format);
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if (!image.isNull())
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scale = qreal(pdev->logicalDpiY()) / qreal(qt_defaultDpi());
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}
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size *= scale;
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return size;
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}
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QTextImageHandler::QTextImageHandler(QObject *parent)
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: QObject(parent)
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{
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}
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QSizeF QTextImageHandler::intrinsicSize(QTextDocument *doc, int posInDocument, const QTextFormat &format)
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{
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Q_UNUSED(posInDocument)
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const QTextImageFormat imageFormat = format.toImageFormat();
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if (qApp->thread() != QThread::currentThread())
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return getImageSize(doc, imageFormat);
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return getPixmapSize(doc, imageFormat);
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}
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void QTextImageHandler::drawObject(QPainter *p, const QRectF &rect, QTextDocument *doc, int posInDocument, const QTextFormat &format)
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{
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Q_UNUSED(posInDocument)
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const QTextImageFormat imageFormat = format.toImageFormat();
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if (qApp->thread() != QThread::currentThread()) {
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const QImage image = getImage(doc, imageFormat);
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p->drawImage(rect, image, image.rect());
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} else {
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const QPixmap pixmap = getPixmap(doc, imageFormat);
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p->drawPixmap(rect, pixmap, pixmap.rect());
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}
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}
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#include "moc_qtextimagehandler_p.h"
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QT_END_NAMESPACE
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