include/svl/lstner.hxx

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   9  * This file incorporates work covered by the following license notice:
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  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19 #ifndef INCLUDED_SVL_LSTNER_HXX
  20 #define INCLUDED_SVL_LSTNER_HXX
  21
  22 #include <svl/svldllapi.h>
  23 #include <map>
  24 #include <memory>
  25 #include <vector>
  26 #ifdef DBG_UTIL
  27 #include <sal/backtrace.hxx>
  28 #endif
  29
  30 class SfxBroadcaster;
  31 class SfxHint;
  32
  33 //StartListening duplicate handling options
  34 //Prevent only adds the listener if it's not already added
  35 //Allow allows duplicate listeners
  36 //Unexpected, the default, is for the usual case where the
  37 //listener should only be added once and duplicates are
  38 //unexpected. In dbgutil mode this tracks where the original
  39 //listener was added from and reports the duplicate addition
  40 //as an error
  41 enum class DuplicateHandling { Unexpected, Prevent, Allow };
  42
  43 class SVL_DLLPUBLIC SfxListener
  44 {
  45     std::vector<SfxBroadcaster*> maBCs;
  46 #ifdef DBG_UTIL
  47     std::map<SfxBroadcaster*, std::unique_ptr<sal::BacktraceState>>
  48         maCallStacks;
  49 #endif
  50
  51 private:
  52     const SfxListener&  operator=(const SfxListener &) = delete;
  53
  54 public:
  55
  56                         SfxListener() {}
  57                         SfxListener( const SfxListener &rCopy );
  58     virtual             ~SfxListener() COVERITY_NOEXCEPT_FALSE;
  59
  60     void                StartListening(SfxBroadcaster& rBroadcaster, DuplicateHandling eDuplicateHanding = DuplicateHandling::Unexpected);
  61     void                EndListening( SfxBroadcaster& rBroadcaster, bool bRemoveAllDuplicates = false );
  62     void                EndListeningAll();
  63     bool                IsListening( SfxBroadcaster& rBroadcaster ) const;
  64
  65     sal_uInt16          GetBroadcasterCount() const;
  66     SfxBroadcaster*     GetBroadcasterJOE( sal_uInt16 nNo ) const;
  67
  68     virtual void        Notify( SfxBroadcaster& rBC, const SfxHint& rHint );
  69
  70     void                RemoveBroadcaster_Impl( SfxBroadcaster& rBC );
  71
  72     /// Used to avoid cost of dynamic_cast in SdrViewIter::ImpFindView
  73     virtual bool        IsSdrView() const { return false; }
  74     /// Used to avoid cost of dynamic_cast in SwXStyleFamily::FindStyle
  75     virtual bool        IsSwXStyle() const { return false; }
  76 };
  77
  78 #endif
  79
  80 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */