Adding upstream version 1:7.0.4.upstream/1%7.0.4upstream

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

1 files changed, 378 insertions, 0 deletions

diff --git a/sw/source/core/inc/txtfly.hxx b/sw/source/core/inc/txtfly.hxx
new file mode 100644
index 000000000..0f3c9e8c7
--- /dev/null
+++ b/sw/source/core/inc/txtfly.hxx
@@ -0,0 +1,378 @@
+/* -*- 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_SOURCE_CORE_INC_TXTFLY_HXX
+#define INCLUDED_SW_SOURCE_CORE_INC_TXTFLY_HXX
+
+#include <editeng/txtrange.hxx>
+#include <tools/solar.h>
+#include <swtypes.hxx>
+#include <swrect.hxx>
+#include <com/sun/star/text/WrapTextMode.hpp>
+#include <memory>
+#include <vector>
+
+class OutputDevice;
+class SwPageFrame;
+class SdrObject;
+class SwFormat;
+class SwAnchoredObject;
+class SwTextFrame;
+class SwDrawTextInfo;
+class SwContourCache;
+
+typedef std::vector< SwAnchoredObject* > SwAnchoredObjList;
+
+/** Contour-cache global variable, initialized/destroyed in txtinit.cxx
+    and needed in txtfly.cxx by text wrapping.
+  */
+extern SwContourCache *pContourCache;
+
+#define POLY_CNT 20
+#define POLY_MIN 5
+#define POLY_MAX 4000
+
+void ClrContourCache( const SdrObject *pObj );
+
+class SwContourCache
+{
+    friend void ClrContourCache();
+    struct CacheItem
+    {
+        const SdrObject *mpSdrObj;
+        std::unique_ptr<TextRanger> mxTextRanger;
+    };
+    std::vector<CacheItem> mvItems;
+    long nPntCnt;
+    SwRect ContourRect( const SwFormat* pFormat, const SdrObject* pObj,
+        const SwTextFrame* pFrame, const SwRect &rLine, const long nXPos,
+        const bool bRight );
+
+public:
+    SwContourCache();
+    ~SwContourCache();
+    const SdrObject* GetObject( sal_uInt16 nPos ) const{ return mvItems[ nPos ].mpSdrObj; }
+    sal_uInt16 GetCount() const { return mvItems.size(); }
+    void ClrObject( sal_uInt16 nPos );
+
+    /**
+      Computes the rectangle that will cover the object in the given line.
+
+      For _non_ contour-flow objects, this is simply the overlap area of
+      BoundRect (including spacing), and the line, for contour-flow,
+      the tools::PolyPolygon of the object gets traversed
+     */
+    static SwRect CalcBoundRect( const SwAnchoredObject* pAnchoredObj,
+                                       const SwRect &rLine,
+                                       const SwTextFrame* pFrame,
+                                       const long nXPos,
+                                       const bool bRight );
+};
+
+/**
+   The purpose of this class is to be the universal interface between
+   formatting/text output and the possibly overlapping free-flying frames.
+   During formatting the formatter gets the information from SwTextFly, whether
+   a certain area is present by the attributes of an overlapping frame.
+   Such areas are represented by dummy portions.
+
+   The whole text output and touch-up is, again, forwarded to a SwTextFly.
+   This one decides, whether parts of the text need to be clipped and splits
+   the areas for e.g. a DrawRect.
+
+   Please note that all free-flying frames are located in a PtrArray, sorted
+   by TopLeft.
+
+   Internally we always use document-global values. The IN and OUT parameters
+   are, however, adjusted to the needs of the LineIter most of the time. That
+   is: they are converted to frame- and window-local coordinates.
+   If multiple frames with wrap attributes are located on the same line, we get
+   the following settings for the text flow:
+
+        L/R    P     L     R     N
+         P   -P-P- -P-L  -P R- -P N
+         L   -L P- -L L  -L R- -L N
+         R    R-P-  R-L   R R-  R N
+         N    N P-  N L   N R-  N N
+
+   (P=parallel, L=left, R=right, N=no wrap)
+
+   We can describe the behaviour as follows:
+   Every frame can push away text, with the restriction that it only has influence
+   until the next frame.
+ */
+class SwTextFly
+{
+    const SwPageFrame                * pPage;
+    const SwAnchoredObject           * mpCurrAnchoredObj;
+    const SwTextFrame                * m_pCurrFrame;
+    const SwTextFrame                * m_pMaster;
+    std::unique_ptr<SwAnchoredObjList> mpAnchoredObjList;
+
+    long nMinBottom;
+    long nNextTop;  /// Stores the upper edge of the "next" frame
+    sal_uLong m_nCurrFrameNodeIndex;
+
+    bool bOn : 1;
+    bool bTopRule: 1;
+    bool mbIgnoreCurrentFrame: 1;
+    bool mbIgnoreContour: 1;
+
+    /** boolean, indicating if objects in page header|footer are considered for
+        text frames not in page header|footer.
+     */
+    bool mbIgnoreObjsInHeaderFooter: 1;
+
+    /**
+        This method will be called during the LineIter formatting
+            \li to compute the position of the next \c FlyPortion
+            \li remember new overlappings after a change of the line height.
+
+        \param[in] rPortion
+            Scope: document global.
+     */
+    SwRect GetFrame_( const SwRect &rPortion ) const;
+
+    SwAnchoredObjList* InitAnchoredObjList();
+
+    SwAnchoredObjList* GetAnchoredObjList() const;
+
+    /**
+        Look for the first object which overlaps with the rectangle.
+        Iterates over the anchored object list mpAnchoredObjList.
+    */
+    bool ForEach( const SwRect &rRect, SwRect* pRect, bool bAvoid ) const;
+
+    /**
+      \li There is less than 2cm space on both sides for the text:
+      no surround (css::text::WrapTextMode_NONE)
+
+      \li There is more than 2cm space on only one side:
+      surround on that side (css::text::WrapTextMode_LEFT or css::text::WrapTextMode_RIGHT)
+
+      \li There is more than 2cm space on both sides, the object is
+      larger than 1.5cm: surround on the wider side
+      (css::text::WrapTextMode_LEFT or css::text::WrapTextMode_RIGHT)
+
+      \li There is more than 2cm space on both sides and the object
+      width is less than 1.5cm: both sides surround (css::text::WrapTextMode_PARALLEL)
+     */
+    css::text::WrapTextMode GetSurroundForTextWrap( const SwAnchoredObject* pAnchoredObj ) const;
+
+    /**
+       The right margin is the right margin or it is determined by the
+       next object standing on the line.
+     */
+    void CalcRightMargin( SwRect &rFly,
+                          SwAnchoredObjList::size_type nPos,
+                          const SwRect &rLine ) const;
+
+    /**
+       The left margin is the left margin of the current PrintArea or
+       it is determined by the last FlyFrame, which stands on the line.
+     */
+    void CalcLeftMargin( SwRect &rFly,
+                         SwAnchoredObjList::size_type nPos,
+                         const SwRect &rLine ) const;
+
+    /**
+       \return the position in sorted array
+     */
+    SwAnchoredObjList::size_type GetPos( const SwAnchoredObject* pAnchoredObj ) const;
+
+    bool GetTop( const SwAnchoredObject* _pAnchoredObj,
+                 const bool bInFootnote,
+                 const bool bInFooterOrHeader );
+
+    SwTwips CalcMinBottom() const;
+
+    const SwTextFrame* GetMaster_();
+
+public:
+
+    SwTextFly();
+    SwTextFly( const SwTextFrame *pFrame );
+    SwTextFly( const SwTextFly& rTextFly );
+    ~SwTextFly();
+
+    void CtorInitTextFly( const SwTextFrame *pFrame );
+
+    void SetTopRule();
+
+    SwRect GetFrame( const SwRect &rPortion ) const;
+    bool IsOn() const;
+
+    /**
+        If there is no flying object frame standing in rRect (usually the current row),
+        then we are turning ourself off.
+
+        \param rRect is global to the document!
+     */
+    bool Relax( const SwRect &rRect );
+    bool Relax();
+
+    SwTwips GetMinBottom() const;
+    const SwTextFrame* GetMaster() const;
+
+    // This temporary variable needs to be manipulated in const methods
+    long GetNextTop() const;
+    void SetNextTop( long nNew ) const;
+
+    /**
+      Determines the demanded rectangle for an anchored object,
+      considering its surround for text wrapping.
+
+      \param pAnchoredObj the object for which to get the bounds
+      \param rLine the bounds of the line to format
+
+      \return the flying object bounds
+      */
+    SwRect AnchoredObjToRect( const SwAnchoredObject* pAnchoredObj,
+                              const SwRect& rRect ) const;
+
+    /**
+        This method is called by DrawText().
+
+        Ensures that the overlapping frames (except the transparent frames) won't
+        be scribbled by setting clip regions so that only the portions that are not
+        in the area of FlyFrames that are opaque and above the current frame will
+        be output.
+
+        DrawText() takes over the on optimization!
+     */
+    void DrawTextOpaque( SwDrawTextInfo &rInf );
+
+    /**
+        Two subtleties needs to be mentioned:
+            \li DrawRect() is allowed over the ClipRects
+            \li FlyToRect() returns bigger values than the frame data
+
+        Ensure that the overlapping frames (except the transparent frames)
+        won't be scribbled
+     */
+    void DrawFlyRect( OutputDevice* pOut, const SwRect &rRect );
+
+    /**
+        Used to switch off the SwTextFly when there is no overlapping object (Relax).
+
+        \param[in] the line area
+        \return whether the line will be overlapped by a frame
+     */
+    bool IsAnyFrame( const SwRect &rLine ) const;
+
+    /**
+        Same as IsAnyFrame(const SwRect&), but uses the current frame print
+        area
+     */
+    bool IsAnyFrame() const;
+
+    /**
+        true when a frame or DrawObj must be taken in account. The optimizations
+        like Paint/FormatEmpty for empty sentences or the virtual OutputDevice can
+        be used only when false is returned.
+
+        \param rRect
+            The rectangle can be empty, the current frame is then used. The value is
+            global to the document.
+      */
+    bool IsAnyObj( const SwRect& rRect ) const;
+
+    void SetIgnoreCurrentFrame( bool bNew );
+    void SetIgnoreContour( bool bNew );
+
+    void SetIgnoreObjsInHeaderFooter( const bool bNew );
+};
+
+inline SwAnchoredObjList* SwTextFly::GetAnchoredObjList() const
+{
+    return mpAnchoredObjList
+           ? mpAnchoredObjList.get()
+           : const_cast<SwTextFly*>(this)->InitAnchoredObjList();
+}
+
+inline void SwTextFly::SetTopRule()
+{
+    bTopRule = false;
+}
+
+inline bool SwTextFly::IsOn() const
+{
+    return bOn;
+}
+
+inline bool SwTextFly::Relax( const SwRect &rRect )
+{
+    if (bOn)
+    {
+        bOn = IsAnyFrame( rRect );
+    }
+    return bOn;
+}
+
+inline bool SwTextFly::Relax()
+{
+    if (bOn)
+    {
+        bOn = IsAnyFrame();
+    }
+    return bOn;
+}
+
+inline SwTwips SwTextFly::GetMinBottom() const
+{
+    return mpAnchoredObjList ? nMinBottom : CalcMinBottom();
+}
+
+inline const SwTextFrame* SwTextFly::GetMaster() const
+{
+    return m_pMaster ? m_pMaster : const_cast<SwTextFly*>(this)->GetMaster_();
+}
+
+inline long SwTextFly::GetNextTop() const
+{
+    return nNextTop;
+}
+
+inline void SwTextFly::SetNextTop( long nNew ) const
+{
+    const_cast<SwTextFly*>(this)->nNextTop = nNew;
+}
+
+inline SwRect SwTextFly::GetFrame( const SwRect &rRect ) const
+{
+    return bOn ? GetFrame_( rRect ) : SwRect();
+}
+
+inline void SwTextFly::SetIgnoreCurrentFrame( bool bNew )
+{
+    mbIgnoreCurrentFrame = bNew;
+}
+
+inline void SwTextFly::SetIgnoreContour( bool bNew )
+{
+    mbIgnoreContour = bNew;
+}
+
+inline void SwTextFly::SetIgnoreObjsInHeaderFooter( const bool bNew )
+{
+    mbIgnoreObjsInHeaderFooter = bNew;
+}
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */