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| ** Copyright (C) 2016 The Qt Company Ltd. |
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| ** This file is part of the QtGui module of the Qt Toolkit. |
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| ** Alternatively, this file may be used under the terms of the GNU |
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| ****************************************************************************/ |
| |
| |
| #include "qtextimagehandler_p.h" |
| |
| #include <qguiapplication.h> |
| #include <qtextformat.h> |
| #include <qpainter.h> |
| #include <qdebug.h> |
| #include <qfile.h> |
| #include <private/qtextengine_p.h> |
| #include <qpalette.h> |
| #include <qthread.h> |
| |
| QT_BEGIN_NAMESPACE |
| |
| extern QString qt_findAtNxFile(const QString &baseFileName, qreal targetDevicePixelRatio, |
| qreal *sourceDevicePixelRatio); |
| static QString resolveFileName(QString fileName, QUrl *url, qreal targetDevicePixelRatio, |
| qreal *sourceDevicePixelRatio) |
| { |
| // We might use the fileName for loading if url loading fails |
| // try to make sure it is a valid file path. |
| // Also, QFile{Info}::exists works only on filepaths (not urls) |
| |
| if (url->isValid()) { |
| if (url->scheme() == QLatin1String("qrc")) { |
| fileName = fileName.right(fileName.length() - 3); |
| } |
| else if (url->scheme() == QLatin1String("file")) { |
| fileName = url->toLocalFile(); |
| } |
| } |
| |
| if (targetDevicePixelRatio <= 1.0) |
| return fileName; |
| |
| // try to find a Nx version |
| return qt_findAtNxFile(fileName, targetDevicePixelRatio, sourceDevicePixelRatio); |
| } |
| |
| |
| static QPixmap getPixmap(QTextDocument *doc, const QTextImageFormat &format, const qreal devicePixelRatio = 1.0) |
| { |
| QPixmap pm; |
| |
| QString name = format.name(); |
| if (name.startsWith(QLatin1String(":/"))) // auto-detect resources and convert them to url |
| name.prepend(QLatin1String("qrc")); |
| QUrl url = QUrl(name); |
| qreal sourcePixelRatio = 1.0; |
| name = resolveFileName(name, &url, devicePixelRatio, &sourcePixelRatio); |
| const QVariant data = doc->resource(QTextDocument::ImageResource, url); |
| if (data.userType() == QMetaType::QPixmap || data.userType() == QMetaType::QImage) { |
| pm = qvariant_cast<QPixmap>(data); |
| } else if (data.userType() == QMetaType::QByteArray) { |
| pm.loadFromData(data.toByteArray()); |
| } |
| |
| if (pm.isNull()) { |
| #if 0 |
| QString context; |
| // ### Qt5 |
| QTextBrowser *browser = qobject_cast<QTextBrowser *>(doc->parent()); |
| if (browser) |
| context = browser->source().toString(); |
| #endif |
| // try direct loading |
| QImage img; |
| if (name.isEmpty() || !img.load(name)) |
| return QPixmap(QLatin1String(":/qt-project.org/styles/commonstyle/images/file-16.png")); |
| |
| pm = QPixmap::fromImage(img); |
| doc->addResource(QTextDocument::ImageResource, url, pm); |
| } |
| |
| if (name.contains(QLatin1String("@2x"))) |
| pm.setDevicePixelRatio(sourcePixelRatio); |
| |
| 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); |
| const int pmWidth = pm.width() / pm.devicePixelRatio(); |
| const int pmHeight = pm.height() / pm.devicePixelRatio(); |
| |
| if (!hasWidth) { |
| if (!hasHeight) |
| size.setWidth(pmWidth); |
| else |
| size.setWidth(qRound(height * (pmWidth / (qreal) pmHeight))); |
| } |
| if (!hasHeight) { |
| if (!hasWidth) |
| size.setHeight(pmHeight); |
| else |
| size.setHeight(qRound(width * (pmHeight / (qreal) pmWidth))); |
| } |
| } |
| |
| 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, const qreal devicePixelRatio = 1.0) |
| { |
| QImage image; |
| |
| QString name = format.name(); |
| if (name.startsWith(QLatin1String(":/"))) // auto-detect resources |
| name.prepend(QLatin1String("qrc")); |
| QUrl url = QUrl(name); |
| qreal sourcePixelRatio = 1.0; |
| name = resolveFileName(name, &url, devicePixelRatio, &sourcePixelRatio); |
| const QVariant data = doc->resource(QTextDocument::ImageResource, url); |
| if (data.userType() == QMetaType::QImage) { |
| image = qvariant_cast<QImage>(data); |
| } else if (data.userType() == QMetaType::QByteArray) { |
| image.loadFromData(data.toByteArray()); |
| } |
| |
| if (image.isNull()) { |
| #if 0 |
| QString context; |
| // ### Qt5 |
| QTextBrowser *browser = qobject_cast<QTextBrowser *>(doc->parent()); |
| if (browser) |
| context = browser->source().toString(); |
| #endif |
| // try direct loading |
| |
| if (name.isEmpty() || !image.load(name)) |
| return QImage(QLatin1String(":/qt-project.org/styles/commonstyle/images/file-16.png")); |
| |
| doc->addResource(QTextDocument::ImageResource, url, image); |
| } |
| |
| if (sourcePixelRatio != 1.0) |
| image.setDevicePixelRatio(sourcePixelRatio); |
| |
| 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() / image.devicePixelRatio()); |
| if (!hasHeight) |
| size.setHeight(image.height() / image.devicePixelRatio()); |
| } |
| |
| 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 (QCoreApplication::instance()->thread() != QThread::currentThread()) |
| return getImageSize(doc, imageFormat); |
| return getPixmapSize(doc, imageFormat); |
| } |
| |
| QImage QTextImageHandler::image(QTextDocument *doc, const QTextImageFormat &imageFormat) |
| { |
| Q_ASSERT(doc != nullptr); |
| |
| return getImage(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 (QCoreApplication::instance()->thread() != QThread::currentThread()) { |
| const QImage image = getImage(doc, imageFormat, p->device()->devicePixelRatioF()); |
| p->drawImage(rect, image, image.rect()); |
| } else { |
| const QPixmap pixmap = getPixmap(doc, imageFormat, p->device()->devicePixelRatioF()); |
| p->drawPixmap(rect, pixmap, pixmap.rect()); |
| } |
| } |
| |
| QT_END_NAMESPACE |
