src/TortoiseProc/RevisionGraph/RemoveSimpleChanges.cpp

   1 // TortoiseSVN - a Windows shell extension for easy version control
   2
   3 // Copyright (C) 2003-2008 - TortoiseSVN
   4
   5 // This program is free software; you can redistribute it and/or
   6 // modify it under the terms of the GNU General Public License
   7 // as published by the Free Software Foundation; either version 2
   8 // of the License, or (at your option) any later version.
   9
  10 // This program is distributed in the hope that it will be useful,
  11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 // GNU General Public License for more details.
  14
  15 // You should have received a copy of the GNU General Public License
  16 // along with this program; if not, write to the Free Software Foundation,
  17 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 //
  19 #include "StdAfx.h"
  20 #include "RemoveSimpleChanges.h"
  21 #include "FullGraphNode.h"
  22 #include "VisibleGraphNode.h"
  23
  24 // construction
  25
  26 CRemoveSimpleChanges::CRemoveSimpleChanges (CRevisionGraphOptionList& list)
  27     : inherited (list)
  28 {
  29 }
  30
  31 // implement IRevisionGraphOption: This option is negated.
  32
  33 bool CRemoveSimpleChanges::IsActive() const
  34 {
  35     return !IsSelected();
  36 }
  37
  38 // implement ICopyFilterOption (pre-filter most nodes)
  39
  40 ICopyFilterOption::EResult
  41 CRemoveSimpleChanges::ShallRemove (const CFullGraphNode* node) const
  42 {
  43     // "M", not a branch point and will not become one due to removed copy-froms
  44
  45     bool nodeIsModificationOnly
  46         =    (node->GetClassification().Is (CNodeClassification::IS_MODIFIED))
  47           && (node->GetFirstCopyTarget() == NULL);
  48
  49     const CFullGraphNode* next = node->GetNext();
  50     bool nextIsModificationOnly
  51         =    (next != NULL)
  52           && (next->GetClassification().Is (CNodeClassification::IS_MODIFIED))
  53           && (next->GetFirstCopyTarget() == NULL);
  54
  55     return nodeIsModificationOnly && nextIsModificationOnly
  56         ? ICopyFilterOption::REMOVE_NODE
  57         : ICopyFilterOption::KEEP_NODE;
  58 }
  59
  60 // implement IModificationOption (post-filter unused copy-from nodes)
  61
  62 void CRemoveSimpleChanges::Apply (CVisibleGraph* graph, CVisibleGraphNode* node)
  63 {
  64     // "M", not a branch point, not the HEAD
  65
  66     if (   (node->GetClassification().Matches
  67                 ( CNodeClassification::IS_MODIFIED
  68                 , static_cast<DWORD>(CNodeClassification::MUST_BE_PRESERVED)))
  69         && (node->GetFirstTag() == NULL)
  70         && (node->GetFirstCopyTarget() == NULL))
  71     {
  72         node->DropNode (graph, true);
  73     }
  74 }