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35 /*! \libinternal \file
37 * Declares gmx::CommandLineHelpContext.
39 * \author Teemu Murtola <teemu.murtola@gmail.com>
41 * \ingroup module_commandline
43 #ifndef GMX_COMMANDLINE_CMDLINEHELPCONTEXT_H
44 #define GMX_COMMANDLINE_CMDLINEHELPCONTEXT_H
46 #include "../onlinehelp/helpwritercontext.h"
47 #include "../utility/common.h"
52 /*! \libinternal \brief
53 * Context information for writing out command-line help.
55 * This class wraps a HelpWriterContext, extending it with information specific
56 * for command-line help export. This way, code using only the routines in the
57 * onlinehelp module is not exposed to extra features of the command-line help
60 * \ingroup module_commandline
62 class CommandLineHelpContext
66 * Creates the context.
68 * Wraps the constructor of HelpWriterContext.
70 CommandLineHelpContext(File *file, HelpOutputFormat format);
71 ~CommandLineHelpContext();
74 * Sets a display name for the module for which help is being written.
76 * \throws std::bad_alloc if out of memory.
78 void setModuleDisplayName(const std::string &name);
79 //! Sets whether hidden options should be shown in help output.
80 void setShowHidden(bool bHidden);
82 //! Returns the lower-level context for writing the help.
83 const HelpWriterContext &writerContext() const;
85 * Returns a display name for the module for which help is being written.
89 const char *moduleDisplayName() const;
90 //! Returns whether hidden options should be shown in help output.
91 bool showHidden() const;
96 PrivateImplPointer<Impl> impl_;
99 /*! \libinternal \brief
100 * Helper for passing CommandLineHelpContext into parse_common_args().
102 * This class provides a mechanism to set and retrieve a global
103 * CommandLineHelpContext object. It is used to pass this object into
104 * parse_common_args() from CommandLineModuleManager::runAsMainCMain() through
105 * the main() function that is not aware of the wrapper binary mechanism.
106 * It is not thread-safe because in this limited use case, it is always called
107 * from a single-threaded context.
110 * \ingroup module_onlinehelp
112 class GlobalCommandLineHelpContext
115 //! Returns the global context, or NULL if not set.
116 static const CommandLineHelpContext *get();
119 * Sets the global context for the scope.
121 * The global context is cleared when this object goes out of scope.
123 * It is an error to have more than one GlobalCommandLineHelpContext
124 * object in existence at the same time.
126 explicit GlobalCommandLineHelpContext(const CommandLineHelpContext &context);
127 //! Clears the global context.
128 ~GlobalCommandLineHelpContext();