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diff --git a/include/comphelper/lok.hxx b/include/comphelper/lok.hxx
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+++ b/include/comphelper/lok.hxx
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+/* -*- 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/.
+ */
+
+#ifndef INCLUDED_COMPHELPER_LOK_HXX
+#define INCLUDED_COMPHELPER_LOK_HXX
+
+#include <comphelper/comphelperdllapi.h>
+#include <rtl/ustring.hxx>
+
+class LanguageTag;
+
+// Interface between the LibreOfficeKit implementation called by LibreOfficeKit clients and other
+// LibreOffice code.
+
+namespace comphelper
+{
+
+namespace LibreOfficeKit
+{
+
+// Functions to be called only from the LibreOfficeKit implementation in desktop, not from other
+// places in LibreOffice code.
+
+COMPHELPER_DLLPUBLIC void setActive(bool bActive = true);
+
+// Call either setMobilePhone() or setTablet() for a view, and at most once. (If neither is called,
+// the view is assumed to be on a desktop browser.) In the future, this will possibly be changed
+// into using an enum for the kind of the view, that can be DESKTOP, MOBILEPHONE, or TABLET.
+
+// Tell that LOK view is on a mobile phone (regardless what its pixel resolution is, whether its form factor is "phablet" or not)
+COMPHELPER_DLLPUBLIC void setMobilePhone(int nViewId);
+
+// Tell that LOK view is on a tablet
+COMPHELPER_DLLPUBLIC void setTablet(int nViewId);
+
+enum class statusIndicatorCallbackType { Start, SetValue, Finish };
+
+COMPHELPER_DLLPUBLIC void setStatusIndicatorCallback(void (*callback)(void *data, statusIndicatorCallbackType type, int percent), void *data);
+
+
+// Functions that can be called from arbitrary places in LibreOffice.
+
+// Check whether the code is running as invoked through LibreOfficeKit.
+COMPHELPER_DLLPUBLIC bool isActive();
+
+/// Shift the coordinates before rendering each bitmap.
+/// Used by Calc to render each tile separately.
+/// This should be unnecessary (and removed) once Calc
+/// moves to using 100MM Unit.
+COMPHELPER_DLLPUBLIC void setLocalRendering(bool bLocalRendering = true);
+COMPHELPER_DLLPUBLIC bool isLocalRendering();
+
+/// Check whether clients want a part number in an invalidation payload.
+COMPHELPER_DLLPUBLIC bool isPartInInvalidation();
+/// Set whether clients want a part number in an invalidation payload.
+COMPHELPER_DLLPUBLIC void setPartInInvalidation(bool bPartInInvalidation);
+
+/// Check if we are doing tiled painting.
+COMPHELPER_DLLPUBLIC bool isTiledPainting();
+/// Set if we are doing tiled painting.
+COMPHELPER_DLLPUBLIC void setTiledPainting(bool bTiledPainting);
+/// Check if we are painting the dialog.
+COMPHELPER_DLLPUBLIC bool isDialogPainting();
+/// Set if we are painting the dialog.
+COMPHELPER_DLLPUBLIC void setDialogPainting(bool bDialogPainting);
+/// Set the DPI scale for rendering for HiDPI displays.
+COMPHELPER_DLLPUBLIC void setDPIScale(double fDPIScale);
+/// Get the DPI scale for rendering for HiDPI displays.
+COMPHELPER_DLLPUBLIC double getDPIScale();
+/// Set if we want no annotations rendering
+COMPHELPER_DLLPUBLIC void setTiledAnnotations(bool bTiledAnnotations);
+/// Check if annotations rendering is turned off
+COMPHELPER_DLLPUBLIC bool isTiledAnnotations();
+/// Set if we want range based header data
+COMPHELPER_DLLPUBLIC void setRangeHeaders(bool bTiledAnnotations);
+/// Check if range based header data is enabled
+COMPHELPER_DLLPUBLIC bool isRangeHeaders();
+
+enum Compat : sal_uInt32
+{
+    none = 0,
+    scNoGridBackground = 1,
+};
+/// Set compatibility flags
+COMPHELPER_DLLPUBLIC void setCompatFlag(Compat flag);
+/// Get compatibility flags
+COMPHELPER_DLLPUBLIC bool isCompatFlagSet(Compat flag);
+
+
+/// Check whether clients want viewId in visible cursor invalidation payload.
+COMPHELPER_DLLPUBLIC bool isViewIdForVisCursorInvalidation();
+/// Set whether clients want viewId in visible cursor invalidation payload.
+COMPHELPER_DLLPUBLIC void setViewIdForVisCursorInvalidation(bool bViewIdForVisCursorInvalidation);
+
+/// Update the current LOK's locale.
+COMPHELPER_DLLPUBLIC void setLocale(const LanguageTag& languageTag);
+/// Get the current LOK's locale.
+COMPHELPER_DLLPUBLIC const LanguageTag& getLocale();
+
+/// Update the current LOK's language.
+COMPHELPER_DLLPUBLIC void setLanguageTag(const LanguageTag& languageTag);
+/// Get the current LOK's language.
+COMPHELPER_DLLPUBLIC const LanguageTag& getLanguageTag();
+/// If the language name should be used for this LOK instance.
+COMPHELPER_DLLPUBLIC bool isWhitelistedLanguage(const OUString& lang);
+
+// Status indicator handling. Even if in theory there could be several status indicators active at
+// the same time, in practice there is only one at a time, so we don't handle any identification of
+// status indicator in this API.
+COMPHELPER_DLLPUBLIC void statusIndicatorStart();
+COMPHELPER_DLLPUBLIC void statusIndicatorSetValue(int percent);
+COMPHELPER_DLLPUBLIC void statusIndicatorFinish();
+
+}
+}
+
+#endif // INCLUDED_COMPHELPER_LOK_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */