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path: root/include/oox/helper/graphichelper.hxx
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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */

#ifndef INCLUDED_OOX_HELPER_GRAPHICHELPER_HXX
#define INCLUDED_OOX_HELPER_GRAPHICHELPER_HXX

#include <map>

#include <com/sun/star/awt/DeviceInfo.hpp>
#include <com/sun/star/uno/Reference.hxx>
#include <oox/dllapi.h>
#include <oox/helper/binarystreambase.hxx>
#include <oox/helper/helper.hxx>
#include <oox/helper/storagebase.hxx>
#include <rtl/ustring.hxx>
#include <sal/types.h>
#include <com/sun/star/graphic/XGraphicProvider2.hpp>
#include <com/sun/star/graphic/XGraphicMapper.hpp>

struct WmfExternal;

namespace com::sun::star {
    namespace awt { struct Point; }
    namespace awt { struct Size; }
    namespace awt { class XUnitConversion; }
    namespace io { class XInputStream; }
    namespace frame { class XFrame; }
    namespace graphic { class XGraphic; }
    namespace graphic { class XGraphicObject; }
    namespace graphic { class XGraphicProvider; }
    namespace uno { class XComponentContext; }
}

namespace oox {


/** Provides helper functions for colors, device measurement conversion,
    graphics, and graphic objects handling.
 */
class OOX_DLLPUBLIC GraphicHelper
{
public:
    explicit            GraphicHelper(
                            const css::uno::Reference< css::uno::XComponentContext >& rxContext,
                            const css::uno::Reference< css::frame::XFrame >& rxTargetFrame,
                            const StorageRef& rxStorage );
    virtual             ~GraphicHelper();

    // System colors and predefined colors ------------------------------------

    /** Returns a system color specified by the passed XML token identifier. */
    ::Color            getSystemColor( sal_Int32 nToken, ::Color nDefaultRgb = API_RGB_TRANSPARENT ) const;
    /** Derived classes may implement to resolve a scheme color from the passed XML token identifier. */
    virtual ::Color    getSchemeColor( sal_Int32 nToken ) const;
    /** Derived classes may implement to resolve a palette index to an RGB color. */
    virtual ::Color    getPaletteColor( sal_Int32 nPaletteIdx ) const;

    virtual sal_Int32 getDefaultChartAreaFillStyle() const;

    /** Returns chartspace automatic default border style */
    static sal_Int32 getDefaultChartAreaLineStyle();

    /** Returns chartspace automatic default border width in Emu */
    static sal_Int16 getDefaultChartAreaLineWidth();

    // Device info and device dependent unit conversion -----------------------

    /** Returns information about the output device. */
    const css::awt::DeviceInfo& getDeviceInfo() const { return maDeviceInfo;}

    /** Converts the passed value from horizontal screen pixels to 1/100 mm. */
    sal_Int32           convertScreenPixelXToHmm( double fPixelX ) const;
    /** Converts the passed value from vertical screen pixels to 1/100 mm. */
    sal_Int32           convertScreenPixelYToHmm( double fPixelY ) const;
    /** Converts the passed size from screen pixels to 1/100 mm. */
    css::awt::Size convertScreenPixelToHmm( const css::awt::Size& rPixel ) const;

    /** Converts the passed value from 1/100 mm to horizontal screen pixels. */
    double              convertHmmToScreenPixelX( sal_Int32 nHmmX ) const;
    /** Converts the passed value from 1/100 mm to vertical screen pixels. */
    double              convertHmmToScreenPixelY( sal_Int32 nHmmY ) const;
    /** Converts the passed point from 1/100 mm to screen pixels. */
    css::awt::Point convertHmmToScreenPixel( const css::awt::Point& rHmm ) const;
    /** Converts the passed size from 1/100 mm to screen pixels. */
    css::awt::Size convertHmmToScreenPixel( const css::awt::Size& rHmm ) const;

    /** Converts the passed point from 1/100 mm to AppFont units. */
    css::awt::Point convertHmmToAppFont( const css::awt::Point& rHmm ) const;
    /** Converts the passed size from 1/100 mm to AppFont units. */
    css::awt::Size convertHmmToAppFont( const css::awt::Size& rHmm ) const;

    // Graphics and graphic objects  ------------------------------------------

    /** Imports a graphic from the passed input stream. */
    css::uno::Reference< css::graphic::XGraphic >
                        importGraphic(
                            const css::uno::Reference< css::io::XInputStream >& rxInStrm,
                            const WmfExternal* pExtHeader = nullptr ) const;

    /** Imports a graphic from the passed binary memory block. */
    css::uno::Reference< css::graphic::XGraphic >
                        importGraphic( const StreamDataSequence& rGraphicData ) const;

    /** Imports a graphic from the storage stream with the passed path and name. */
    css::uno::Reference< css::graphic::XGraphic >
                        importEmbeddedGraphic(
                            const OUString& rStreamName,
                            const WmfExternal* pExtHeader = nullptr ) const;

    /** calculates the original size of a graphic which is necessary to be able to calculate cropping values
        @return The original Graphic size in 100thmm */
    css::awt::Size getOriginalSize( const css::uno::Reference< css::graphic::XGraphic >& rxGraphic ) const;

    void setGraphicMapper(css::uno::Reference<css::graphic::XGraphicMapper> const & rxGraphicMapper);

    void initializeGraphicMapperIfNeeded() const;
private:

    css::uno::Reference< css::uno::XComponentContext > mxContext;
    css::uno::Reference< css::graphic::XGraphicProvider2 > mxGraphicProvider;
    css::uno::Reference< css::awt::XUnitConversion > mxUnitConversion;
    css::awt::DeviceInfo maDeviceInfo; ///< Current output device info.
    ::std::map< sal_Int32, ::Color >  maSystemPalette;  ///< Maps system colors (XML tokens) to RGB color values.
    StorageRef          mxStorage;                  ///< Storage containing embedded graphics.
    double              mfPixelPerHmmX;             ///< Number of screen pixels per 1/100 mm in X direction.
    double              mfPixelPerHmmY;             ///< Number of screen pixels per 1/100 mm in Y direction.
    css::uno::Reference<css::graphic::XGraphicMapper> mxGraphicMapper;
};


} // namespace oox

#endif

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