ENH: add boundaryToCell, patchToCell topoSetCellSources (#1060)

- can be used, for example, to visualize all wall cells - for quality
  or other purposes - without requiring an intermediate faceSet for
  the selection. Request arising from pending merge !213.

src/meshTools/sets/cellSources/patchToCell/patchToCell.H

@@ -0,0 +1,118 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2018 OpenCFD Ltd.
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
+
+Class
+    Foam::patchToCell
+
+Description
+    A topoSetCellSource to select cells associated with patches.
+
+    \heading Dictionary parameters
+    \table
+        Property    | Description                           | Required | Default
+        patches     | The face zone names or regexs         | possibly |
+        patch       | The face zone name or regex           | possibly |
+    \endtable
+
+Note
+    Must specify "patches" or "patch" (highest to lowest precedence).
+
+SourceFiles
+    patchToCell.C
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef patchToCell_H
+#define patchToCell_H
+
+#include "topoSetCellSource.H"
+#include "wordRes.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+/*---------------------------------------------------------------------------*\
+                        Class patchToCell Declaration
+\*---------------------------------------------------------------------------*/
+
+class patchToCell
+:
+    public topoSetCellSource
+{
+    // Private Data
+
+        //- Add usage string
+        static addToUsageTable usage_;
+
+        //- Matcher for patches
+        wordRes selectedPatches_;
+
+
+    // Private Member Functions
+
+        void combine(topoSet& set, const bool add) const;
+
+
+public:
+
+    //- Runtime type information
+    TypeName("patchToCell");
+
+    // Constructors
+
+        //- Construct from components
+        patchToCell(const polyMesh& mesh, const wordRe& patchName);
+
+        //- Construct from dictionary
+        patchToCell(const polyMesh& mesh, const dictionary& dict);
+
+        //- Construct from Istream
+        patchToCell(const polyMesh& mesh, Istream& is);
+
+
+    //- Destructor
+    virtual ~patchToCell() = default;
+
+
+    // Member Functions
+
+        virtual void applyToSet
+        (
+            const topoSetSource::setAction action,
+            topoSet& set
+        ) const;
+
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //