/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
/*
 * This file is part of the Collabora Office 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_SVX_SOURCE_INC_STYLES_PREVIEW_WINDOW_HXX
#define INCLUDED_SVX_SOURCE_INC_STYLES_PREVIEW_WINDOW_HXX

#include <svx/svxdllapi.h>
#include <vcl/InterimItemWindow.hxx>
#include <svl/style.hxx>
#include <com/sun/star/frame/XDispatchProvider.hpp>
#include <com/sun/star/frame/XFrame.hpp>
#include <sfx2/sfxstatuslistener.hxx>

class SfxObjectShell;

// pair of id and name, name can be translated to other language
struct StylePreviewDescriptor
{
    OUString commonName; // English: Heading 1
    OUString translatedName; //  German: Überschrift 1
    SfxStyleFamily eFamily = SfxStyleFamily::Para; // which style family the entry belongs to
};
typedef std::vector<StylePreviewDescriptor> StylePreviewList;

class StylesPreviewWindow_Base;

/// Listener for style selection
class StyleStatusListener final : public SfxStatusListener
{
    StylesPreviewWindow_Base* m_pPreviewControl;

public:
    StyleStatusListener(
        StylesPreviewWindow_Base* pPreviewControl,
        const css::uno::Reference<css::frame::XDispatchProvider>& xDispatchProvider);

    void StateChangedAtStatusListener(SfxItemState eState, const SfxPoolItem* pState) override;
};

/// Listener for styles creation or modification
class StylePoolChangeListener final : public SfxListener
{
    StylesPreviewWindow_Base* m_pPreviewControl;
    SfxStyleSheetBasePool* m_pStyleSheetPool;

public:
    StylePoolChangeListener(StylesPreviewWindow_Base* pPreviewControl);
    ~StylePoolChangeListener();

    virtual void Notify(SfxBroadcaster& rBC, const SfxHint& rHint) override;
};

class StyleItemController
{
    static constexpr unsigned LEFT_MARGIN = 8;

    SfxStyleFamily m_eStyleFamily;
    StylePreviewDescriptor m_aStyleName;

public:
    StyleItemController(StylePreviewDescriptor aStyleName);

    void Paint(vcl::RenderContext& rRenderContext);

private:
    void DrawEntry(vcl::RenderContext& rRenderContext);
    void DrawText(vcl::RenderContext& rRenderContext);
    void DrawHighlight(vcl::RenderContext& rRenderContext, Color aFontBack);
    static void DrawContentBackground(vcl::RenderContext& rRenderContext,
                                      const tools::Rectangle& rContentRect, const Color& rColor);
};

class StylesListUpdateTask final : public Idle
{
    StylesPreviewWindow_Base& m_rStylesList;

public:
    StylesListUpdateTask(StylesPreviewWindow_Base& rStylesList)
        : Idle("StylesListUpdateTask")
        , m_rStylesList(rStylesList)
    {
        SetPriority(TaskPriority::DEFAULT_IDLE);
    }

    virtual void Invoke() override;
};

class StylesPreviewWindow_Base
{
    friend class StylesListUpdateTask;

protected:
    static constexpr unsigned STYLES_COUNT = 6;

    css::uno::Reference<css::frame::XFrame> m_xFrame;

    std::unique_ptr<weld::IconView> m_xStylesView;

    StylesListUpdateTask m_aUpdateTask;

    rtl::Reference<StyleStatusListener> m_xStatusListener;
    std::unique_ptr<StylePoolChangeListener> m_pStylePoolChangeListener;

    StylePreviewList m_aDefaultStyles;
    StylePreviewList m_aAllStyles;

    OUString m_sSelectedStyle;

    DECL_LINK(Selected, weld::IconView&, void);
    DECL_LINK(DoubleClick, weld::IconView&, bool);
    DECL_LINK(DoCommand, const CommandEvent&, bool);
    DECL_LINK(GetPreviewImage, const weld::encoded_image_query&, bool);
    DECL_LINK(QueryTooltip, const weld::TreeIter&, OUString);

public:
    StylesPreviewWindow_Base(weld::Builder& xBuilder, const StylePreviewList& rDefaultStyles,
                             const css::uno::Reference<css::frame::XFrame>& xFrame);
    ~StylesPreviewWindow_Base();

    void Select(const OUString& rStyleName);
    void RequestStylesListUpdate();
    /// Collect the styles shown in the preview for a document, seeded with the
    /// given default styles. A style that carries an alias is listed with the
    /// alias as its display name.
    SVXCORE_DLLPUBLIC static StylePreviewList GetStyleList(SfxObjectShell* pDocShell,
                                                           const StylePreviewList& rDefaultStyles);
    SVXCORE_DLLPUBLIC static Bitmap GetCachedPreview(const StylePreviewDescriptor& rStyle,
                                                     int nDpiScale = 100);
    static OString GetCachedPreviewJson(const StylePreviewDescriptor& rStyle, int nDpiScale = 100);

private:
    void UpdateStylesList();
    void UpdateSelection();
    bool Command(const CommandEvent& rEvent);
};

class StylesPreviewWindow_Impl final : public InterimItemWindow, public StylesPreviewWindow_Base
{
public:
    StylesPreviewWindow_Impl(vcl::Window* pParent, const StylePreviewList& rDefaultStyles,
                             const css::uno::Reference<css::frame::XFrame>& xFrame);
    ~StylesPreviewWindow_Impl();

    void dispose();

    void SetOptimalSize();
};

#endif

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