mirror of
https://github.com/crystalidea/qt6windows7.git
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75 lines
2.8 KiB
C++
75 lines
2.8 KiB
C++
// Copyright (C) 2016 The Qt Company Ltd.
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// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
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#include "qwindowsinternalmimedata.h"
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#include "qwindowscontext.h"
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#include "qwindowsmimeregistry.h"
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#include <QtCore/qdebug.h>
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#include <QtCore/qvariant.h>
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/*!
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\class QWindowsInternalMimeDataBase
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\brief Base for implementations of QInternalMimeData using a IDataObject COM object.
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In clipboard handling and Drag and drop, static instances
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of QInternalMimeData implementations are kept and passed to the client.
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QInternalMimeData provides virtuals that query the formats and retrieve
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mime data on demand when the client invokes functions like QMimeData::hasHtml(),
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QMimeData::html() on the instance returned. Otherwise, expensive
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construction of a new QMimeData object containing all possible
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formats would have to be done in each call to mimeData().
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The base class introduces new virtuals to obtain and release
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the instances IDataObject from the clipboard or Drag and Drop and
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does conversion using QWindowsMimeConverter classes.
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\sa QInternalMimeData, QWindowsMimeConverter, QWindowsMimeRegistry
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\internal
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*/
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bool QWindowsInternalMimeData::hasFormat_sys(const QString &mime) const
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{
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IDataObject *pDataObj = retrieveDataObject();
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if (!pDataObj)
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return false;
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const QWindowsMimeRegistry &mc = QWindowsContext::instance()->mimeConverter();
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const bool has = mc.converterToMime(mime, pDataObj) != nullptr;
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releaseDataObject(pDataObj);
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qCDebug(lcQpaMime) << __FUNCTION__ << mime << has;
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return has;
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}
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QStringList QWindowsInternalMimeData::formats_sys() const
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{
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IDataObject *pDataObj = retrieveDataObject();
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if (!pDataObj)
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return QStringList();
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const QWindowsMimeRegistry &mc = QWindowsContext::instance()->mimeConverter();
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const QStringList fmts = mc.allMimesForFormats(pDataObj);
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releaseDataObject(pDataObj);
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qCDebug(lcQpaMime) << __FUNCTION__ << fmts;
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return fmts;
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}
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QVariant QWindowsInternalMimeData::retrieveData_sys(const QString &mimeType, QMetaType type) const
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{
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IDataObject *pDataObj = retrieveDataObject();
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if (!pDataObj)
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return QVariant();
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QVariant result;
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const QWindowsMimeRegistry &mc = QWindowsContext::instance()->mimeConverter();
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if (auto converter = mc.converterToMime(mimeType, pDataObj))
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result = converter->convertToMime(mimeType, pDataObj, type);
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releaseDataObject(pDataObj);
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if (QWindowsContext::verbose) {
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qCDebug(lcQpaMime) <<__FUNCTION__ << ' ' << mimeType << ' ' << type.name()
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<< " returns " << result.metaType().name()
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<< (result.metaType().id() != QMetaType::QByteArray ? result.toString() : QStringLiteral("<data>"));
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}
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return result;
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}
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