Adding upstream version 4:24.2.0.upstream/4%24.2.0

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 681 insertions, 0 deletions

diff --git a/svx/source/tbxctrls/StylesPreviewWindow.cxx b/svx/source/tbxctrls/StylesPreviewWindow.cxx
new file mode 100644
index 0000000000..da560feb0e
--- /dev/null
+++ b/svx/source/tbxctrls/StylesPreviewWindow.cxx
@@ -0,0 +1,681 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
+/*
+ * 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 .
+ */
+
+#include <StylesPreviewWindow.hxx>
+
+#include <comphelper/base64.hxx>
+#include <comphelper/lok.hxx>
+#include <comphelper/propertyvalue.hxx>
+#include <utility>
+#include <vcl/svapp.hxx>
+#include <sfx2/objsh.hxx>
+#include <svl/itemset.hxx>
+#include <sfx2/tbxctrl.hxx>
+#include <sfx2/sfxsids.hrc>
+#include <sfx2/tplpitem.hxx>
+#include <sfx2/viewsh.hxx>
+#include <vcl/filter/PngImageWriter.hxx>
+#include <vcl/glyphitemcache.hxx>
+#include <vcl/virdev.hxx>
+#include <vcl/settings.hxx>
+
+#include <editeng/editids.hrc>
+#include <editeng/fontitem.hxx>
+#include <editeng/fhgtitem.hxx>
+#include <editeng/svxfont.hxx>
+#include <editeng/wghtitem.hxx>
+#include <editeng/postitem.hxx>
+#include <editeng/contouritem.hxx>
+#include <editeng/shdditem.hxx>
+#include <editeng/charreliefitem.hxx>
+#include <editeng/udlnitem.hxx>
+#include <editeng/crossedoutitem.hxx>
+#include <editeng/colritem.hxx>
+#include <editeng/cmapitem.hxx>
+#include <editeng/emphasismarkitem.hxx>
+#include <editeng/brushitem.hxx>
+
+#include <i18nlangtag/mslangid.hxx>
+
+#include <svx/xfillit0.hxx>
+#include <svx/xdef.hxx>
+#include <svx/xflclit.hxx>
+
+#include <com/sun/star/drawing/FillStyle.hpp>
+#include <com/sun/star/i18n/ScriptType.hpp>
+#include <com/sun/star/uno/Sequence.hxx>
+
+#include <vcl/commandevent.hxx>
+#include <tools/json_writer.hxx>
+
+namespace
+{
+class StylePreviewCache
+{
+private:
+    class JsonStylePreviewCacheClear final : public Timer
+    {
+    public:
+        JsonStylePreviewCacheClear()
+            : Timer("Json Style Preview Cache clear callback")
+        {
+            // a generous 30 secs
+            SetTimeout(30000);
+            SetStatic();
+        }
+        virtual void Invoke() override { StylePreviewCache::gJsonStylePreviewCache.clear(); }
+    };
+
+    static std::map<OUString, VclPtr<VirtualDevice>> gStylePreviewCache;
+    static std::map<OUString, OString> gJsonStylePreviewCache;
+    static int gStylePreviewCacheClients;
+    static JsonStylePreviewCacheClear gJsonIdleClear;
+
+public:
+    static std::map<OUString, VclPtr<VirtualDevice>>& Get() { return gStylePreviewCache; }
+    static std::map<OUString, OString>& GetJson() { return gJsonStylePreviewCache; }
+
+    static void ClearCache(bool bHard)
+    {
+        for (auto& aPreview : gStylePreviewCache)
+            aPreview.second.disposeAndClear();
+
+        gStylePreviewCache.clear();
+        if (bHard)
+        {
+            StylePreviewCache::gJsonStylePreviewCache.clear();
+            gJsonIdleClear.Stop();
+        }
+        else
+        {
+            // tdf#155720 don't immediately clear the json representation
+            gJsonIdleClear.Start();
+        }
+    }
+
+    static void RegisterClient()
+    {
+        if (!gStylePreviewCacheClients)
+            gJsonIdleClear.Stop();
+        gStylePreviewCacheClients++;
+    }
+
+    static void UnregisterClient()
+    {
+        gStylePreviewCacheClients--;
+        if (!gStylePreviewCacheClients)
+            ClearCache(false);
+    }
+};
+
+std::map<OUString, VclPtr<VirtualDevice>> StylePreviewCache::gStylePreviewCache;
+std::map<OUString, OString> StylePreviewCache::gJsonStylePreviewCache;
+int StylePreviewCache::gStylePreviewCacheClients;
+StylePreviewCache::JsonStylePreviewCacheClear StylePreviewCache::gJsonIdleClear;
+}
+
+StyleStatusListener::StyleStatusListener(
+    StylesPreviewWindow_Base* pPreviewControl,
+    const css::uno::Reference<css::frame::XDispatchProvider>& xDispatchProvider)
+    : SfxStatusListener(xDispatchProvider, SID_STYLE_FAMILY2, ".uno:ParaStyle")
+    , m_pPreviewControl(pPreviewControl)
+{
+    ReBind();
+}
+
+void StyleStatusListener::StateChangedAtStatusListener(SfxItemState /*eState*/,
+                                                       const SfxPoolItem* pState)
+{
+    const SfxTemplateItem* pStateItem = dynamic_cast<const SfxTemplateItem*>(pState);
+    if (pStateItem)
+    {
+        if (pStateItem->GetStyleIdentifier().isEmpty())
+            m_pPreviewControl->Select(pStateItem->GetStyleName());
+        else
+            m_pPreviewControl->Select(pStateItem->GetStyleIdentifier());
+    }
+}
+
+StylePoolChangeListener::StylePoolChangeListener(StylesPreviewWindow_Base* pPreviewControl)
+    : m_pPreviewControl(pPreviewControl)
+{
+    SfxObjectShell* pDocShell = SfxObjectShell::Current();
+
+    m_pStyleSheetPool = pDocShell ? pDocShell->GetStyleSheetPool() : nullptr;
+
+    if (m_pStyleSheetPool)
+    {
+        StartListening(*m_pStyleSheetPool);
+    }
+}
+
+StylePoolChangeListener::~StylePoolChangeListener()
+{
+    if (m_pStyleSheetPool)
+        EndListening(*m_pStyleSheetPool);
+}
+
+void StylePoolChangeListener::Notify(SfxBroadcaster& /*rBC*/, const SfxHint& rHint)
+{
+    if (rHint.GetId() == SfxHintId::StyleSheetModified)
+        StylePreviewCache::ClearCache(true);
+    m_pPreviewControl->RequestStylesListUpdate();
+}
+
+StyleItemController::StyleItemController(std::pair<OUString, OUString> aStyleName)
+    : m_eStyleFamily(SfxStyleFamily::Para)
+    , m_aStyleName(std::move(aStyleName))
+{
+}
+
+void StyleItemController::Paint(vcl::RenderContext& rRenderContext)
+{
+    rRenderContext.Push(vcl::PushFlags::FILLCOLOR | vcl::PushFlags::FONT
+                        | vcl::PushFlags::TEXTCOLOR);
+
+    DrawEntry(rRenderContext);
+
+    rRenderContext.Pop();
+}
+
+bool StylesPreviewWindow_Base::Command(const CommandEvent& rEvent)
+{
+    if (rEvent.GetCommand() != CommandEventId::ContextMenu)
+        return false;
+
+    std::unique_ptr<weld::Builder> xBuilder(
+        Application::CreateBuilder(m_xStylesView.get(), "svx/ui/stylemenu.ui"));
+    std::unique_ptr<weld::Menu> xMenu(xBuilder->weld_menu("menu"));
+    OUString rIdent = xMenu->popup_at_rect(m_xStylesView.get(),
+                                           tools::Rectangle(rEvent.GetMousePosPixel(), Size(1, 1)));
+    if (rIdent == "update" || rIdent == "edit")
+    {
+        css::uno::Sequence<css::beans::PropertyValue> aArgs(0);
+
+        const css::uno::Reference<css::frame::XDispatchProvider> xProvider(m_xFrame,
+                                                                           css::uno::UNO_QUERY);
+        SfxToolBoxControl::Dispatch(xProvider,
+                                    rIdent == "update" ? OUString(".uno:StyleUpdateByExample")
+                                                       : OUString(".uno:EditStyle"),
+                                    aArgs);
+
+        return true;
+    }
+
+    return false;
+}
+
+static Color GetTextColorFromItemSet(std::optional<SfxItemSet> const& pItemSet)
+{
+    const SfxPoolItem* pItem = pItemSet->GetItem(SID_ATTR_CHAR_COLOR);
+    if (pItem)
+        return static_cast<const SvxColorItem*>(pItem)->GetValue();
+
+    return COL_AUTO;
+}
+
+static Color GetHighlightColorFromItemSet(std::optional<SfxItemSet> const& pItemSet)
+{
+    const SfxPoolItem* pItem = pItemSet->GetItem(SID_ATTR_BRUSH_CHAR);
+    if (pItem)
+        return static_cast<const SvxBrushItem*>(pItem)->GetColor();
+
+    return COL_AUTO;
+}
+
+static Color GetBackgroundColorFromItemSet(std::optional<SfxItemSet> const& pItemSet)
+{
+    const SfxPoolItem* pItem = pItemSet->GetItem(XATTR_FILLCOLOR);
+    if (pItem)
+        return static_cast<const XFillColorItem*>(pItem)->GetColorValue();
+
+    return COL_AUTO;
+}
+
+static css::drawing::FillStyle GetFillStyleFromItemSet(std::optional<SfxItemSet> const& pItemSet)
+{
+    const SfxPoolItem* pItem = pItemSet->GetItem(XATTR_FILLSTYLE);
+    if (pItem)
+        return static_cast<const XFillStyleItem*>(pItem)->GetValue();
+
+    return css::drawing::FillStyle_NONE;
+}
+
+static SvxFont GetFontFromItems(const SvxFontItem* pFontItem, Size aPixelFontSize,
+                                std::optional<SfxItemSet> const& pItemSet)
+{
+    SvxFont aFont;
+
+    aFont.SetFamilyName(pFontItem->GetFamilyName());
+    aFont.SetStyleName(pFontItem->GetStyleName());
+    aFont.SetFontSize(aPixelFontSize);
+
+    const SfxPoolItem* pItem = pItemSet->GetItem(SID_ATTR_CHAR_WEIGHT);
+    if (pItem)
+        aFont.SetWeight(static_cast<const SvxWeightItem*>(pItem)->GetWeight());
+
+    pItem = pItemSet->GetItem(SID_ATTR_CHAR_POSTURE);
+    if (pItem)
+        aFont.SetItalic(static_cast<const SvxPostureItem*>(pItem)->GetPosture());
+
+    pItem = pItemSet->GetItem(SID_ATTR_CHAR_CONTOUR);
+    if (pItem)
+        aFont.SetOutline(static_cast<const SvxContourItem*>(pItem)->GetValue());
+
+    pItem = pItemSet->GetItem(SID_ATTR_CHAR_SHADOWED);
+    if (pItem)
+        aFont.SetShadow(static_cast<const SvxShadowedItem*>(pItem)->GetValue());
+
+    pItem = pItemSet->GetItem(SID_ATTR_CHAR_RELIEF);
+    if (pItem)
+        aFont.SetRelief(static_cast<const SvxCharReliefItem*>(pItem)->GetValue());
+
+    pItem = pItemSet->GetItem(SID_ATTR_CHAR_UNDERLINE);
+    if (pItem)
+        aFont.SetUnderline(static_cast<const SvxUnderlineItem*>(pItem)->GetLineStyle());
+
+    pItem = pItemSet->GetItem(SID_ATTR_CHAR_OVERLINE);
+    if (pItem)
+        aFont.SetOverline(static_cast<const SvxOverlineItem*>(pItem)->GetValue());
+
+    pItem = pItemSet->GetItem(SID_ATTR_CHAR_STRIKEOUT);
+    if (pItem)
+        aFont.SetStrikeout(static_cast<const SvxCrossedOutItem*>(pItem)->GetStrikeout());
+
+    pItem = pItemSet->GetItem(SID_ATTR_CHAR_CASEMAP);
+    if (pItem)
+        aFont.SetCaseMap(static_cast<const SvxCaseMapItem*>(pItem)->GetCaseMap());
+
+    pItem = pItemSet->GetItem(SID_ATTR_CHAR_EMPHASISMARK);
+    if (pItem)
+        aFont.SetEmphasisMark(static_cast<const SvxEmphasisMarkItem*>(pItem)->GetEmphasisMark());
+
+    return aFont;
+}
+
+void StyleItemController::DrawEntry(vcl::RenderContext& rRenderContext)
+{
+    SfxObjectShell* pShell = SfxObjectShell::Current();
+    if (!pShell)
+        return;
+
+    SfxStyleSheetBasePool* pPool = pShell->GetStyleSheetPool();
+    SfxStyleSheetBase* pStyle = nullptr;
+
+    if (!pPool)
+        return;
+
+    pStyle = pPool->First(m_eStyleFamily);
+    while (pStyle && pStyle->GetName() != m_aStyleName.first
+           && pStyle->GetName() != m_aStyleName.second)
+        pStyle = pPool->Next();
+
+    if (!pStyle)
+        return;
+
+    Size aSize(rRenderContext.GetOutputSizePixel());
+    tools::Rectangle aFullRect(Point(0, 0), aSize);
+    tools::Rectangle aContentRect(aFullRect);
+
+    Color aOriginalColor = rRenderContext.GetFillColor();
+    Color aOriginalLineColor = rRenderContext.GetLineColor();
+
+    DrawContentBackground(rRenderContext, aContentRect, aOriginalColor);
+
+    std::optional<SfxItemSet> const pItemSet(pStyle->GetItemSetForPreview());
+    if (!pItemSet)
+        return;
+
+    Color aFontHighlight = COL_AUTO;
+
+    sal_Int16 nScriptType
+        = MsLangId::getScriptType(Application::GetSettings().GetUILanguageTag().getLanguageType());
+
+    sal_uInt16 nFontSlot = SID_ATTR_CHAR_FONT;
+    if (nScriptType == css::i18n::ScriptType::ASIAN)
+        nFontSlot = SID_ATTR_CHAR_CJK_FONT;
+    else if (nScriptType == css::i18n::ScriptType::COMPLEX)
+        nFontSlot = SID_ATTR_CHAR_CTL_FONT;
+
+    const SvxFontItem* const pFontItem = pItemSet->GetItem<SvxFontItem>(nFontSlot);
+    const SvxFontHeightItem* const pFontHeightItem
+        = pItemSet->GetItem<SvxFontHeightItem>(SID_ATTR_CHAR_FONTHEIGHT);
+
+    if (pFontItem && pFontHeightItem)
+    {
+        Size aFontSize(0, pFontHeightItem->GetHeight());
+        Size aPixelSize(rRenderContext.LogicToPixel(aFontSize, MapMode(pShell->GetMapUnit())));
+
+        SvxFont aFont = GetFontFromItems(pFontItem, aPixelSize, pItemSet);
+        rRenderContext.SetFont(aFont);
+
+        Color aFontCol = GetTextColorFromItemSet(pItemSet);
+        if (aFontCol != COL_AUTO)
+            rRenderContext.SetTextColor(aFontCol);
+
+        aFontHighlight = GetHighlightColorFromItemSet(pItemSet);
+
+        css::drawing::FillStyle style = GetFillStyleFromItemSet(pItemSet);
+
+        switch (style)
+        {
+            case css::drawing::FillStyle_SOLID:
+            {
+                Color aBackCol = GetBackgroundColorFromItemSet(pItemSet);
+                if (aBackCol != COL_AUTO)
+                    DrawContentBackground(rRenderContext, aContentRect, aBackCol);
+            }
+            break;
+
+            default:
+                break;
+                //TODO Draw the other background styles: gradient, hatching and bitmap
+        }
+    }
+
+    if (aFontHighlight != COL_AUTO)
+        DrawHighlight(rRenderContext, aFontHighlight);
+
+    DrawText(rRenderContext);
+
+    rRenderContext.SetFillColor(aOriginalColor);
+    rRenderContext.SetLineColor(aOriginalLineColor);
+}
+
+void StyleItemController::DrawContentBackground(vcl::RenderContext& rRenderContext,
+                                                const tools::Rectangle& aContentRect,
+                                                const Color& aColor)
+{
+    rRenderContext.SetLineColor(aColor);
+    rRenderContext.SetFillColor(aColor);
+    rRenderContext.DrawRect(aContentRect);
+}
+
+void StyleItemController::DrawHighlight(vcl::RenderContext& rRenderContext, Color aFontBack)
+{
+    tools::Rectangle aTextRect;
+    rRenderContext.GetTextBoundRect(aTextRect, m_aStyleName.second);
+
+    Size aSize = aTextRect.GetSize();
+    aSize.AdjustHeight(aSize.getHeight());
+    aTextRect.SetSize(aSize);
+
+    Point aPos(0, 0);
+    aPos.AdjustX(LEFT_MARGIN);
+    aPos.AdjustY((rRenderContext.GetOutputHeightPixel() - aTextRect.Bottom()) / 2);
+    aTextRect.SetPos(aPos);
+
+    rRenderContext.SetLineColor(aFontBack);
+    rRenderContext.SetFillColor(aFontBack);
+
+    rRenderContext.DrawRect(aTextRect);
+}
+
+void StyleItemController::DrawText(vcl::RenderContext& rRenderContext)
+{
+    const SalLayoutGlyphs* layoutGlyphs
+        = SalLayoutGlyphsCache::self()->GetLayoutGlyphs(&rRenderContext, m_aStyleName.second);
+    tools::Rectangle aTextRect;
+    rRenderContext.GetTextBoundRect(aTextRect, m_aStyleName.second, 0, 0, -1, 0, {}, {},
+                                    layoutGlyphs);
+
+    Point aPos(0, 0);
+    aPos.AdjustX(LEFT_MARGIN);
+    aPos.AdjustY((rRenderContext.GetOutputHeightPixel() - aTextRect.Bottom()) / 2);
+
+    rRenderContext.DrawText(aPos, m_aStyleName.second, 0, -1, nullptr, nullptr, layoutGlyphs);
+}
+
+StylesPreviewWindow_Base::StylesPreviewWindow_Base(
+    weld::Builder& xBuilder, std::vector<std::pair<OUString, OUString>>&& aDefaultStyles,
+    const css::uno::Reference<css::frame::XFrame>& xFrame)
+    : m_xFrame(xFrame)
+    , m_xStylesView(xBuilder.weld_icon_view("stylesview"))
+    , m_aUpdateTask(*this)
+    , m_aDefaultStyles(std::move(aDefaultStyles))
+{
+    StylePreviewCache::RegisterClient();
+
+    m_xStylesView->connect_selection_changed(LINK(this, StylesPreviewWindow_Base, Selected));
+    m_xStylesView->connect_item_activated(LINK(this, StylesPreviewWindow_Base, DoubleClick));
+    m_xStylesView->connect_command(LINK(this, StylesPreviewWindow_Base, DoCommand));
+    m_xStylesView->connect_get_property_tree_elem(
+        LINK(this, StylesPreviewWindow_Base, DoJsonProperty));
+
+    const css::uno::Reference<css::frame::XDispatchProvider> xProvider(m_xFrame,
+                                                                       css::uno::UNO_QUERY);
+    m_xStatusListener = new StyleStatusListener(this, xProvider);
+
+    m_pStylePoolChangeListener.reset(new StylePoolChangeListener(this));
+
+    RequestStylesListUpdate();
+}
+
+IMPL_LINK(StylesPreviewWindow_Base, Selected, weld::IconView&, rIconView, void)
+{
+    OUString sStyleName = rIconView.get_selected_text();
+
+    css::uno::Sequence<css::beans::PropertyValue> aArgs{
+        comphelper::makePropertyValue("Template", sStyleName),
+        comphelper::makePropertyValue("Family", sal_Int16(SfxStyleFamily::Para))
+    };
+    const css::uno::Reference<css::frame::XDispatchProvider> xProvider(m_xFrame,
+                                                                       css::uno::UNO_QUERY);
+    SfxToolBoxControl::Dispatch(xProvider, ".uno:StyleApply", aArgs);
+}
+
+IMPL_LINK(StylesPreviewWindow_Base, DoubleClick, weld::IconView&, rIconView, bool)
+{
+    OUString sStyleName = rIconView.get_selected_text();
+
+    css::uno::Sequence<css::beans::PropertyValue> aArgs{
+        comphelper::makePropertyValue("Param", sStyleName),
+        comphelper::makePropertyValue("Family", sal_Int16(SfxStyleFamily::Para))
+    };
+    const css::uno::Reference<css::frame::XDispatchProvider> xProvider(m_xFrame,
+                                                                       css::uno::UNO_QUERY);
+    SfxToolBoxControl::Dispatch(xProvider, ".uno:EditStyle", aArgs);
+
+    return true;
+}
+
+IMPL_LINK(StylesPreviewWindow_Base, DoCommand, const CommandEvent&, rPos, bool)
+{
+    return Command(rPos);
+}
+
+StylesPreviewWindow_Base::~StylesPreviewWindow_Base()
+{
+    m_xStatusListener->UnBind();
+
+    m_aUpdateTask.Stop();
+
+    StylePreviewCache::UnregisterClient();
+
+    try
+    {
+        m_xStatusListener->dispose();
+    }
+    catch (css::uno::Exception&)
+    {
+    }
+
+    m_xStatusListener = nullptr;
+}
+
+void StylesPreviewWindow_Base::Select(const OUString& rStyleName)
+{
+    m_sSelectedStyle = rStyleName;
+
+    UpdateSelection();
+}
+
+void StylesPreviewWindow_Base::UpdateSelection()
+{
+    for (std::vector<std::pair<OUString, OUString>>::size_type i = 0; i < m_aAllStyles.size(); ++i)
+    {
+        if (m_aAllStyles[i].first == m_sSelectedStyle || m_aAllStyles[i].second == m_sSelectedStyle)
+        {
+            m_xStylesView->select(i);
+            break;
+        }
+    }
+}
+
+void StylesPreviewWindow_Base::RequestStylesListUpdate() { m_aUpdateTask.Start(); }
+
+void StylesListUpdateTask::Invoke()
+{
+    m_rStylesList.UpdateStylesList();
+    m_rStylesList.UpdateSelection();
+}
+
+static OString extractPngString(const BitmapEx& rBitmap)
+{
+    SvMemoryStream aOStm(65535, 65535);
+    // Use fastest compression "1"
+    css::uno::Sequence<css::beans::PropertyValue> aFilterData{
+        comphelper::makePropertyValue("Compression", sal_Int32(1)),
+    };
+    vcl::PngImageWriter aPNGWriter(aOStm);
+    aPNGWriter.setParameters(aFilterData);
+    if (aPNGWriter.write(rBitmap))
+    {
+        css::uno::Sequence<sal_Int8> aSeq(static_cast<sal_Int8 const*>(aOStm.GetData()),
+                                          aOStm.Tell());
+        OStringBuffer aBuffer("data:image/png;base64,");
+        ::comphelper::Base64::encode(aBuffer, aSeq);
+        return aBuffer.makeStringAndClear();
+    }
+
+    return ""_ostr;
+}
+
+// 0: json writer, 1: TreeIter, 2: property. returns true if supported
+IMPL_LINK(StylesPreviewWindow_Base, DoJsonProperty, const weld::json_prop_query&, rQuery, bool)
+{
+    if (std::get<2>(rQuery) != "image")
+        return false;
+
+    const weld::TreeIter& rIter = std::get<1>(rQuery);
+    OUString sStyleId(m_xStylesView->get_id(rIter));
+    OUString sStyleName(m_xStylesView->get_text(rIter));
+    OString sBase64Png(GetCachedPreviewJson(std::pair<OUString, OUString>(sStyleId, sStyleName)));
+    if (sBase64Png.isEmpty())
+        return false;
+
+    tools::JsonWriter& rJsonWriter = std::get<0>(rQuery);
+    rJsonWriter.put("image", sBase64Png);
+
+    return true;
+}
+
+VclPtr<VirtualDevice>
+StylesPreviewWindow_Base::GetCachedPreview(const std::pair<OUString, OUString>& rStyle)
+{
+    auto aFound = StylePreviewCache::Get().find(rStyle.second);
+    if (aFound != StylePreviewCache::Get().end())
+        return StylePreviewCache::Get()[rStyle.second];
+    else
+    {
+        VclPtr<VirtualDevice> pImg = VclPtr<VirtualDevice>::Create();
+        const Size aSize(100, 30);
+        pImg->SetOutputSizePixel(aSize);
+
+        StyleItemController aStyleController(rStyle);
+        aStyleController.Paint(*pImg);
+        StylePreviewCache::Get()[rStyle.second] = pImg;
+
+        return pImg;
+    }
+}
+
+OString StylesPreviewWindow_Base::GetCachedPreviewJson(const std::pair<OUString, OUString>& rStyle)
+{
+    auto aJsonFound = StylePreviewCache::GetJson().find(rStyle.second);
+    if (aJsonFound != StylePreviewCache::GetJson().end())
+        return StylePreviewCache::GetJson()[rStyle.second];
+
+    VclPtr<VirtualDevice> xDev = GetCachedPreview(rStyle);
+    BitmapEx aBitmap(xDev->GetBitmapEx(Point(0, 0), xDev->GetOutputSize()));
+    OString sResult = extractPngString(aBitmap);
+    StylePreviewCache::GetJson()[rStyle.second] = sResult;
+    return sResult;
+}
+
+void StylesPreviewWindow_Base::UpdateStylesList()
+{
+    m_aAllStyles = m_aDefaultStyles;
+
+    SfxObjectShell* pDocShell = SfxObjectShell::Current();
+    SfxStyleSheetBasePool* pStyleSheetPool = nullptr;
+
+    if (pDocShell)
+        pStyleSheetPool = pDocShell->GetStyleSheetPool();
+
+    if (pStyleSheetPool)
+    {
+        auto xIter = pStyleSheetPool->CreateIterator(SfxStyleFamily::Para,
+                                                     SfxStyleSearchBits::UserDefined);
+
+        SfxStyleSheetBase* pStyle = xIter->First();
+
+        while (pStyle)
+        {
+            OUString sName(pStyle->GetName());
+            m_aAllStyles.push_back(std::pair<OUString, OUString>(sName, sName));
+            pStyle = xIter->Next();
+        }
+    }
+
+    m_xStylesView->freeze();
+    m_xStylesView->clear();
+    // for online we can skip inserting the preview into the IconView and rely
+    // on DoJsonProperty to provide the image to clients
+    const bool bNeedInsertPreview = !comphelper::LibreOfficeKit::isActive();
+    for (const auto& rStyle : m_aAllStyles)
+    {
+        VclPtr<VirtualDevice> pImg = bNeedInsertPreview ? GetCachedPreview(rStyle) : nullptr;
+        m_xStylesView->append(rStyle.first, rStyle.second, pImg);
+    }
+    m_xStylesView->thaw();
+}
+
+StylesPreviewWindow_Impl::StylesPreviewWindow_Impl(
+    vcl::Window* pParent, std::vector<std::pair<OUString, OUString>>&& aDefaultStyles,
+    const css::uno::Reference<css::frame::XFrame>& xFrame)
+    : InterimItemWindow(pParent, "svx/ui/stylespreview.ui", "ApplyStyleBox", true,
+                        reinterpret_cast<sal_uInt64>(SfxViewShell::Current()))
+    , StylesPreviewWindow_Base(*m_xBuilder, std::move(aDefaultStyles), xFrame)
+{
+    SetOptimalSize();
+}
+
+StylesPreviewWindow_Impl::~StylesPreviewWindow_Impl() { disposeOnce(); }
+
+void StylesPreviewWindow_Impl::dispose()
+{
+    m_xStylesView.reset();
+
+    InterimItemWindow::dispose();
+}
+
+void StylesPreviewWindow_Impl::SetOptimalSize() { SetSizePixel(get_preferred_size()); }
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */