Re #11619. Added ExtractSpectra algorithm.

Code/Mantid/Framework/Algorithms/CMakeLists.txt

@@ -99,6 +99,7 @@ set ( SRC_FILES
 	src/ExtractMask.cpp
 	src/ExtractMaskToTable.cpp
 	src/ExtractSingleSpectrum.cpp
+	src/ExtractSpectra.cpp
 	src/FFT.cpp
 	src/FFTDerivative.cpp
 	src/FFTSmooth.cpp
@@ -357,6 +358,7 @@ set ( INC_FILES
 	inc/MantidAlgorithms/ExtractMask.h
 	inc/MantidAlgorithms/ExtractMaskToTable.h
 	inc/MantidAlgorithms/ExtractSingleSpectrum.h
+	inc/MantidAlgorithms/ExtractSpectra.h
 	inc/MantidAlgorithms/FFT.h
 	inc/MantidAlgorithms/FFTDerivative.h
 	inc/MantidAlgorithms/FFTSmooth.h
@@ -622,6 +624,7 @@ set ( TEST_FILES
 	ExtractMaskTest.h
 	ExtractMaskToTableTest.h
 	ExtractSingleSpectrumTest.h
+	ExtractSpectraTest.h
 	FFTDerivativeTest.h
 	FFTSmooth2Test.h
 	FFTTest.h

Code/Mantid/Framework/Algorithms/inc/MantidAlgorithms/ExtractSpectra.h

@@ -0,0 +1,79 @@
+#ifndef MANTID_ALGORITHMS_EXTRACTSPECTRA_H_
+#define MANTID_ALGORITHMS_EXTRACTSPECTRA_H_
+
+#include "MantidKernel/System.h"
+#include "MantidAPI/Algorithm.h"
+#include "MantidDataObjects/EventWorkspace.h"
+
+namespace Mantid {
+namespace Algorithms {
+
+/** Extracts specified spectra from a workspace and places them in a new
+  workspace.
+
+
+  Copyright © 2015 ISIS Rutherford Appleton Laboratory, NScD Oak Ridge
+  National Laboratory & European Spallation Source
+
+  This file is part of Mantid.
+
+  Mantid 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.
+
+  Mantid 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+
+  File change history is stored at: <https://github.com/mantidproject/mantid>
+  Code Documentation is available at: <http://doxygen.mantidproject.org>
+*/
+class DLLExport ExtractSpectra : public API::Algorithm {
+public:
+  ExtractSpectra();
+  virtual ~ExtractSpectra();
+
+  virtual const std::string name() const;
+  virtual int version() const;
+  virtual const std::string category() const;
+  virtual const std::string summary() const;
+
+private:
+  void init();
+  void exec();
+  void execEvent();
+
+  void checkProperties();
+  std::size_t getXMin(const int wsIndex = 0);
+  std::size_t getXMax(const int wsIndex = 0);
+  void cropRagged(API::MatrixWorkspace_sptr outputWorkspace, int inIndex,
+                  int outIndex);
+
+  /// The input workspace
+  API::MatrixWorkspace_sptr m_inputWorkspace;
+  DataObjects::EventWorkspace_sptr eventW;
+  /// The bin index to start the cropped workspace from
+  std::size_t m_minX;
+  /// The bin index to end the cropped workspace at
+  std::size_t m_maxX;
+  /// The spectrum index to start the cropped workspace from
+  specid_t m_minSpec;
+  /// The spectrum index to end the cropped workspace at
+  specid_t m_maxSpec;
+  /// Flag indicating whether the input workspace has common boundaries
+  bool m_commonBoundaries;
+  /// Flag indicating whether we're dealing with histogram data
+  bool m_histogram;
+  /// Flag indicating whether XMin and/or XMax has been set
+  bool m_croppingInX;
+};
+
+} // namespace Algorithms
+} // namespace Mantid
+
+#endif /* MANTID_ALGORITHMS_EXTRACTSPECTRA_H_ */