Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

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

1 files changed, 514 insertions, 0 deletions

diff --git a/sw/inc/anchoredobject.hxx b/sw/inc/anchoredobject.hxx
new file mode 100644
index 000000000..2dd945e4c
--- /dev/null
+++ b/sw/inc/anchoredobject.hxx
@@ -0,0 +1,514 @@
+/* -*- 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_SW_INC_ANCHOREDOBJECT_HXX
+#define INCLUDED_SW_INC_ANCHOREDOBJECT_HXX
+
+#include "swtypes.hxx"
+#include "swrect.hxx"
+#include <libxml/xmlwriter.h>
+
+struct SwPosition;
+class SdrObject;
+class SwFrame;
+class SwLayoutFrame;
+class SwTextFrame;
+class SwFlyFrame;
+class SwPageFrame;
+
+class SwFrameFormat;
+class SwFormatAnchor;
+enum class RndStdIds;
+
+/** wrapper class for the positioning of Writer fly frames and drawing objects
+
+    Purpose of this class is to provide a unified interface for the positioning
+    of Writer fly frames (derived classes of <SwFlyFrame>) and of drawing objects
+    (derived classes of <SwAnchoredDrawObject>).
+*/
+class SW_DLLPUBLIC SwAnchoredObject
+{
+    private:
+        // drawing object representing the anchored object in the drawing layer
+        SdrObject* mpDrawObj;
+        /// Frame the object is anchored at.
+        /// For at-char/at-para anchor, this is always the master SwTextFrame.
+        SwFrame* mpAnchorFrame;
+        // #i28701 - page frame the object is registered at
+        // note: no page frame for as-character anchored objects
+        SwPageFrame* mpPageFrame;
+        // current relative position (relative to anchor position of anchor frame)
+        Point maRelPos;
+
+        // for to-character anchored objects:
+        // Last known anchor character rectangle.
+        // Used to decide, if invalidation has to been performed, if anchor position
+        // has changed, and used to position object.
+        SwRect maLastCharRect;
+
+        // for to-character anchored objects:
+        // Last known top of line, in which the anchor character is in.
+        // Used to decide, if invalidation has to been performed, if anchor position
+        // has changed, and used to position object.
+        SwTwips mnLastTopOfLine;
+
+        // for to-paragraph and to-character anchored objects:
+        // Layout frame vertical position is orient at - typically it's the upper
+        // of the anchor frame, but it could also by the upper of a follow or
+        // a following layout frame in the text flow.
+        const SwLayoutFrame* mpVertPosOrientFrame;
+
+        // i#i28701 boolean, indicating that the object
+        // positioning algorithm is in progress.
+        bool mbPositioningInProgress;
+
+        // Booleans needed for the layout process.
+        // Values only of relevance for to-paragraph and to-character anchored
+        // floating screen object, for whose the 'straight-forward positioning
+        // process are applied
+        // Otherwise value of <mbConsiderForTextWrap> is treated as <true>,
+        // value of <mbPositionLocked> is treated as <false> and
+        // value of <mbRestartLayoutProcess> is treated as <false>.
+        // i#35911 - add boolean <mbClearEnvironment>
+        // Indicates that due to its position and wrapping style its layout
+        // environment is cleared - all content is moved forward.
+        // Treated as <false>, if not the 'straight-forward positioning process"
+        // is applied.
+        bool mbConsiderForTextWrap;
+        bool mbPositionLocked;
+        // boolean needed to keep position of
+        // anchored object locked due to special object positioning for sections.
+        bool mbKeepPositionLockedForSection;
+
+        bool mbRestartLayoutProcess;
+        bool mbClearedEnvironment;
+
+        // i#i3317 - boolean, indicating that temporarily
+        // the wrapping style influence of the anchored object has to be
+        // considered during its positioning.
+        // This boolean is used, if compatibility option 'Consider wrapping style
+        // influence on object positioning' is OFF and a positioning loop is
+        // detected in method <SwFlyAtContentFrame::MakeAll()> or method
+        // <SwAnchoredDrawObject::MakeObjPosAnchoredAtPara()>.
+        // The boolean is reset to <false>, when the layout process for a
+        // page frame starts.
+        bool mbTmpConsiderWrapInfluence;
+
+        mutable SwRect maObjRectWithSpaces;
+        mutable bool mbObjRectWithSpacesValid;
+        mutable SwRect maLastObjRect;
+
+        /** method to indicate, that positioning of anchored object is in progress
+
+            note: method is implemented empty
+        */
+        friend class SwObjPositioningInProgress;
+        void SetPositioningInProgress( const bool _bPosInProgress )
+        {
+            mbPositioningInProgress = _bPosInProgress;
+        }
+
+        /** check anchor character rectangle
+
+            helper method for method <CheckCharRectAndTopOfLine()>
+            For to-character anchored Writer fly frames the member <maLastCharRect>
+            is updated. This is checked for change and depending on the applied
+            positioning, it's decided, if the Writer fly frame has to be invalidated.
+            improvement - add second parameter <_rAnchorCharFrame>
+
+            @param _rAnch
+            input parameter - reference to anchor position
+
+            @param _rAnchorCharFrame
+            input parameter - reference to the text frame containing the anchor
+            character.
+        */
+        void CheckCharRect( const SwFormatAnchor& _rAnch,
+                             const SwTextFrame& _rAnchorCharFrame );
+
+        /** check top of line
+
+            helper method for method <CheckCharRectAndTopOfLine()>
+            For to-character anchored Writer fly frames the member <mnLastTopOfLine>
+            is updated. This is checked for change and depending on the applied
+            positioning, it's decided, if the Writer fly frame has to be invalidated.
+
+            @param _rAnch
+            input parameter - reference to anchor position
+
+            @param _rAnchorCharFrame
+            input parameter - reference to the text frame containing the anchor
+            character.
+        */
+        void CheckTopOfLine( const SwFormatAnchor& _rAnch,
+                              const SwTextFrame& _rAnchorCharFrame );
+
+        // method <sw_HideObj(..)> sets needed data structure values for the
+        // object positioning
+        friend bool sw_HideObj( const SwTextFrame& _rFrame,
+                                 const RndStdIds _eAnchorType,
+                                 SwPosition const& rAnchorPos,
+                                 SwAnchoredObject* _pAnchoredObj );
+    protected:
+        SwAnchoredObject();
+
+        void SetVertPosOrientFrame( const SwLayoutFrame& _rVertPosOrientFrame );
+
+        /** method to assure that anchored object is registered at the correct
+            page frame
+        */
+        virtual void RegisterAtCorrectPage() = 0;
+
+        /** method to indicate, that anchored object is attached to an anchor frame */
+        virtual void ObjectAttachedToAnchorFrame();
+
+        /** method to determine, if other anchored objects, also attached at
+            to the anchor frame, have to consider its wrap influence.
+        */
+        bool ConsiderObjWrapInfluenceOfOtherObjs() const;
+
+        /** method to apply temporary consideration of wrapping style influence
+            to the anchored objects, which are anchored at the same anchor frame
+        */
+        void SetTmpConsiderWrapInfluenceOfOtherObjs();
+
+        virtual bool SetObjTop_( const SwTwips _nTop) = 0;
+        virtual bool SetObjLeft_( const SwTwips _nLeft) = 0;
+
+        virtual SwRect GetObjBoundRect() const = 0;
+    public:
+
+        virtual ~SwAnchoredObject();
+
+        // accessors to member <mpDrawObj>
+        void SetDrawObj( SdrObject& _rDrawObj );
+        const SdrObject* GetDrawObj() const { return mpDrawObj; }
+        SdrObject* DrawObj() { return mpDrawObj; }
+
+        // accessors to member <mpAnchorFrame>
+        const SwFrame* GetAnchorFrame() const { return mpAnchorFrame; }
+        SwFrame* AnchorFrame() { return mpAnchorFrame; }
+        void ChgAnchorFrame( SwFrame* _pNewAnchorFrame );
+        /** determine anchor frame containing the anchor position
+
+            the anchor frame, which is determined, is <mpAnchorFrame>
+            for an at-page, at-frame or at-paragraph anchored object
+            and the anchor character frame for an at-character and as-character
+            anchored object.
+        */
+        SwFrame* GetAnchorFrameContainingAnchPos();
+
+        SwPageFrame* GetPageFrame() { return mpPageFrame; }
+        const SwPageFrame* GetPageFrame() const { return mpPageFrame; }
+        void SetPageFrame( SwPageFrame* _pNewPageFrame );
+
+        /** method to determine the page frame, on which the 'anchor' of
+            the given anchored object is.
+
+            Adjust meaning of method and thus its name: If the anchored object
+            or its anchor isn't correctly inserted in the layout, no page frame
+            can be found. Thus, the return type changed to be a pointer and can
+            be NULL.
+
+            @param _rAnchoredObj
+            input parameter - anchored object, for which the page frame of its
+            'anchor' has to be determined.
+
+            @return SwPageFrame&
+            page frame, the 'anchor' of the given anchored object is on
+        */
+        SwPageFrame* FindPageFrameOfAnchor();
+
+        /** get frame, which contains the anchor character, if the object
+            is anchored at-character or as-character.
+
+            @return SwTextFrame*
+            text frame containing the anchor character. It's NULL, if the object
+            isn't anchored at-character resp. as-character.
+        */
+        SwTextFrame* FindAnchorCharFrame();
+
+        // accessors to data of position calculation:
+        // frame vertical position is orient at
+        const SwLayoutFrame* GetVertPosOrientFrame() const
+        {
+            return mpVertPosOrientFrame;
+        }
+        // method to clear member <mpVertPosOrientFrame>
+        void ClearVertPosOrientFrame();
+
+        /** check anchor character rectangle and top of line
+
+            For to-character anchored Writer fly frames the members <maLastCharRect>
+            and <maLastTopOfLine> are updated. These are checked for change and
+            depending on the applied positioning, it's decided, if the Writer fly
+            frame has to be invalidated.
+
+            @param _bCheckForParaPorInf
+            input parameter - boolean indicating, if check on paragraph portion
+            information has to be done.
+        */
+        void CheckCharRectAndTopOfLine( const bool _bCheckForParaPorInf );
+
+        // accessors to member <maLastCharRect>
+        const SwRect& GetLastCharRect() const { return maLastCharRect;}
+        SwTwips GetRelCharX( const SwFrame* pFrame ) const;
+        SwTwips GetRelCharY( const SwFrame* pFrame ) const;
+        void AddLastCharY( tools::Long nDiff );
+        void ResetLastCharRectHeight();
+
+        // accessor to member <nmLastTopOfLine>
+        SwTwips GetLastTopOfLine() const { return mnLastTopOfLine;}
+        void AddLastTopOfLineY( SwTwips _nDiff );
+
+        /** reset members <maLastCharRect> and <mnLastTopOfLine> */
+        void ClearCharRectAndTopOfLine();
+
+        /** method to determine position for the object and set the position
+            at the object
+        */
+        virtual void MakeObjPos() = 0;
+
+        /** is positioning of anchored object in progress */
+        bool IsPositioningInProgress() const
+        {
+            return mbPositioningInProgress;
+        }
+
+        /** method to determine, if invalidation of position is allowed */
+        bool InvalidationOfPosAllowed() const;
+
+        /** method to invalidate position of the anchored object */
+        virtual void InvalidateObjPos() = 0;
+
+        virtual void RegisterAtPage(SwPageFrame &) = 0;
+
+        /** method to perform necessary invalidations for the positioning of
+            objects, for whose the wrapping style influence has to be considered
+            on the object positioning.
+        */
+        void InvalidateObjPosForConsiderWrapInfluence();
+
+        /** method to trigger notification of 'background' */
+        virtual void NotifyBackground( SwPageFrame* _pPageFrame,
+                                       const SwRect& _rRect,
+                                       PrepareHint _eHint ) = 0;
+
+        // accessors to the current relative position (relative to anchor
+        // position of anchor frame)
+        const Point& GetCurrRelPos() const { return maRelPos;}
+        void SetCurrRelPos( Point _aRelPos );
+
+        // accessors to the format
+        virtual SwFrameFormat& GetFrameFormat() = 0;
+        virtual const SwFrameFormat& GetFrameFormat() const = 0;
+
+        // accessors to the object area and its position
+        virtual SwRect GetObjRect() const = 0;
+
+        void SetObjTop( const SwTwips _nTop);
+        void SetObjLeft( const SwTwips _nLeft);
+
+        /** method update layout direction the layout direction, the anchored
+            object is assigned to
+
+            method has typically to be called, if the anchored object gets its
+            anchor frame assigned and if the anchor frame changes its layout direction
+        */
+        virtual void UpdateLayoutDir();
+
+        /** method to determine object area inclusive its spacing */
+        const SwRect& GetObjRectWithSpaces() const;
+
+        void InvalidateObjRectWithSpaces() const
+        {
+            mbObjRectWithSpacesValid = false;
+        }
+
+        /** method to determine, if wrapping style influence of the anchored
+            object has to be considered on the object positioning
+
+            Note: result of this method also decides, if the boolean for the
+            layout process are of relevance.
+        */
+        bool ConsiderObjWrapInfluenceOnObjPos() const;
+
+        // accessors to booleans for layout process
+        bool ConsiderForTextWrap() const;
+        void SetConsiderForTextWrap( const bool _bConsiderForTextWrap );
+        bool PositionLocked() const;
+        void LockPosition()
+        {
+            mbPositionLocked = true;
+        }
+        void UnlockPosition()
+        {
+            if ( !mbKeepPositionLockedForSection )
+            {
+                mbPositionLocked = false;
+            }
+        }
+
+        void SetKeepPosLocked( const bool _bKeepPosLocked )
+        {
+            mbKeepPositionLockedForSection = _bKeepPosLocked;
+        }
+
+        bool RestartLayoutProcess() const;
+        void SetRestartLayoutProcess( const bool _bRestartLayoutProcess );
+        // accessors for <mbClearedEnvironment>
+        bool ClearedEnvironment() const;
+        void SetClearedEnvironment( const bool _bClearedEnvironment );
+
+        // reset booleans for layout process
+        void ResetLayoutProcessBools()
+        {
+            mbPositioningInProgress = false;
+            mbConsiderForTextWrap = false;
+            mbPositionLocked = false;
+            mbKeepPositionLockedForSection = false;
+            mbRestartLayoutProcess = false;
+            mbClearedEnvironment = false;
+            mbTmpConsiderWrapInfluence = false;
+        }
+
+        /** method to determine, if due to anchored object size and wrapping
+            style, its layout environment is cleared.
+        */
+        bool HasClearedEnvironment() const;
+
+        /** method to update anchored object in the <SwSortedObjs> lists
+
+            Method is not proposed to be called during a layout process is
+            running. It has been used on the change of the anchored object
+            attributes, which belongs the sort criteria of <SwSortedObjs>.
+            If document compatibility option 'Consider wrapping style influence
+            on object positioning' is ON, additionally all anchored objects
+            at the anchor frame and all following anchored objects on the page
+            frame are invalidated.
+        */
+        void UpdateObjInSortedList();
+
+        /** method to determine, if a format on the anchored object is possible
+
+            A format isn't possible, if anchored object is in an invisible layer.
+            Note: method is virtual to refine the conditions for the sub-classes.
+        */
+        virtual bool IsFormatPossible() const;
+
+        /** method to determine if dragging objects off page is allowed
+
+            Returns true if editor objects can be dragged off page, false otherwise
+        */
+        static bool IsDraggingOffPageAllowed(const SwFrameFormat*);
+
+        // accessors to member <mbTmpConsiderWrapInfluence>
+        void SetTmpConsiderWrapInfluence( const bool _bTmpConsiderWrapInfluence );
+        bool IsTmpConsiderWrapInfluence() const { return mbTmpConsiderWrapInfluence;}
+        void ClearTmpConsiderWrapInfluence();
+
+        /** method to determine, if the anchored object is overlapping with a
+            previous column
+
+            overlapping with a previous column means, that the object overlaps
+            with a column, which is a previous one of the column its anchor
+            frame is in.
+            Only applied for at-paragraph and at-character anchored objects.
+        */
+        bool OverlapsPrevColumn() const;
+
+        /** method to determine position of anchored object relative to
+            anchor frame
+
+            Usage: Needed layout information for WW8 export
+
+            @return Point - determined relative position
+        */
+        Point GetRelPosToAnchorFrame() const;
+
+        /** method to determine position of anchored object relative to
+            page frame
+
+            Usage: Needed layout information for WW8 export
+
+            If <_bFollowTextFlow> is set and object is anchored inside table,
+            the position relative to the table cell is determined. Output
+            parameter <_obRelToTableCell> reflects this situation
+
+            @param _bFollowTextFlow
+            input parameter - boolean indicating, if the anchored object has to
+            follow the text flow.
+
+            @param _obRelToTableCell
+            output parameter - boolean indicating, the determine position is
+            relative to the table cell
+
+            @return Point - determined relative position
+        */
+        Point GetRelPosToPageFrame( const bool _bFollowTextFlow,
+                                  bool& _obRelToTableCell ) const;
+
+        /** method to determine position of anchored object relative to
+            anchor character
+
+            Usage: Needed layout information for WW8 export
+
+            @return Point - determined relative position
+        */
+        Point GetRelPosToChar() const;
+
+        /** method to determine position of anchored object relative to
+            top of line
+
+            Usage: Needed layout information for WW8 export
+
+            @return Point - determined relative position
+        */
+        Point GetRelPosToLine() const;
+
+        /** Dump a bunch of useful data to an XML representation to ease
+            layout understanding, debugging and testing.
+          */
+        virtual void dumpAsXml( xmlTextWriterPtr pWriter ) const;
+
+        /** The element name to show in the XML dump. */
+        virtual const char* getElementName( ) const { return "SwAnchoredObject"; }
+
+        virtual const SwFlyFrame* DynCastFlyFrame() const;
+        virtual SwFlyFrame* DynCastFlyFrame();
+};
+
+/// Helper class for notify that positioning of an anchored object is in progress.
+class SwObjPositioningInProgress
+{
+    private:
+        SwAnchoredObject* mpAnchoredObj;
+        // boolean indicating old state
+        // of anchored object regarding positioning in progress in order to
+        // consider nested usage of class <SwObjPositioningInProgress>
+        bool mbOldObjPositioningInProgress;
+
+    public:
+        SwObjPositioningInProgress( SdrObject& _rSdrObj );
+        SwObjPositioningInProgress( SwAnchoredObject& _rAnchoredObj );
+        ~SwObjPositioningInProgress();
+};
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */