123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175 | // Copyright (C) 2016 The Qt Company Ltd.// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only#include"qtextimagehandler_p.h"#include <qguiapplication.h>#include <qtextformat.h>#include <qpainter.h>#include <qdebug.h>#include <qfile.h>#include <qicon.h>#include <private/qtextengine_p.h>#include <qpalette.h>#include <qthread.h>#include <limits> QT_BEGIN_NAMESPACE using namespaceQt::StringLiterals;staticinline QUrl findAtNxFileOrResource(const QString &baseFileName, qreal targetDevicePixelRatio, qreal *sourceDevicePixelRatio, QString *name){// qt_findAtNxFile expects a file name that can be tested with QFile::exists.// so if the format.name() is a file:/ or qrc:/ URL, then we need to strip away the schema. QString localFile;const QUrl url(baseFileName);bool hasFileScheme =false;bool isResource =false;if(url.isLocalFile()) { localFile = url.toLocalFile(); hasFileScheme =true;}else if(baseFileName.startsWith("qrc:/"_L1)) {// QFile::exists() can only handle ":/file.txt" localFile = baseFileName.sliced(3); isResource =true;}else{ localFile = baseFileName; isResource = baseFileName.startsWith(":/"_L1);}*name =qt_findAtNxFile(localFile, targetDevicePixelRatio, sourceDevicePixelRatio);if(hasFileScheme)returnQUrl::fromLocalFile(*name);if(isResource)returnQUrl("qrc"_L1 + *name);returnQUrl(*name);}template<typename T>static T getAs(QTextDocument *doc,const QTextImageFormat &format,const qreal devicePixelRatio =1.0){ qreal sourcePixelRatio =1.0; QString name;const QUrl url =findAtNxFileOrResource(format.name(), devicePixelRatio, &sourcePixelRatio, &name);const QVariant data = doc->resource(QTextDocument::ImageResource, url); T result;if(data.userType() ==QMetaType::QPixmap || data.userType() ==QMetaType::QImage) result = data.value<T>();else if(data.metaType() ==QMetaType::fromType<QByteArray>()) result.loadFromData(data.toByteArray());if(result.isNull()) {if(name.isEmpty() || !result.load(name))returnT(":/qt-project.org/styles/commonstyle/images/file-16.png"_L1); doc->addResource(QTextDocument::ImageResource, url, result);}if(sourcePixelRatio !=1.0) result.setDevicePixelRatio(sourcePixelRatio);return result;}template<typename T>static QSize getSize(QTextDocument *doc,const QTextImageFormat &format){const bool hasWidth = format.hasProperty(QTextFormat::ImageWidth);int width =qRound(format.width());const bool hasHeight = format.hasProperty(QTextFormat::ImageHeight);const int height =qRound(format.height());const bool hasMaxWidth = format.hasProperty(QTextFormat::ImageMaxWidth);constauto maxWidth = format.maximumWidth();int effectiveMaxWidth =std::numeric_limits<int>::max();if(hasMaxWidth) {if(maxWidth.type() ==QTextLength::PercentageLength) effectiveMaxWidth = (doc->pageSize().width() -2* doc->documentMargin()) * maxWidth.value(100) /100;else effectiveMaxWidth = maxWidth.rawValue(); width =qMin(effectiveMaxWidth, width);} T source; QSize size(width, height);if(!hasWidth || !hasHeight) { source = getAs<T>(doc, format); QSizeF sourceSize = source.deviceIndependentSize();if(sourceSize.width() > effectiveMaxWidth) {// image is bigger than effectiveMaxWidth, scale it down sourceSize.setHeight(effectiveMaxWidth * (sourceSize.height() /qreal(sourceSize.width()))); sourceSize.setWidth(effectiveMaxWidth);}if(!hasWidth) {if(!hasHeight) size.setWidth(sourceSize.width());else size.setWidth(qMin(effectiveMaxWidth,qRound(height * (sourceSize.width() /qreal(sourceSize.height())))));}if(!hasHeight) {if(!hasWidth) size.setHeight(sourceSize.height());else size.setHeight(qRound(width * (sourceSize.height() /qreal(sourceSize.width()))));}} qreal scale =1.0; QPaintDevice *pdev = doc->documentLayout()->paintDevice();if(pdev) {if(source.isNull()) source = getAs<T>(doc, format);if(!source.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 getSize<QImage>(doc, imageFormat);return getSize<QPixmap>(doc, imageFormat);} QImage QTextImageHandler::image(QTextDocument *doc,const QTextImageFormat &imageFormat){Q_ASSERT(doc !=nullptr);return getAs<QImage>(doc, imageFormat);}voidQTextImageHandler::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 = getAs<QImage>(doc, imageFormat, p->device()->devicePixelRatio()); p->drawImage(rect, image, image.rect());}else{const QPixmap pixmap = getAs<QPixmap>(doc, imageFormat, p->device()->devicePixelRatio()); p->drawPixmap(rect, pixmap, pixmap.rect());}} QT_END_NAMESPACE #include"moc_qtextimagehandler_p.cpp"
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