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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 const HelpLinks *links);
72 ~CommandLineHelpContext();
75 * Sets a display name for the module for which help is being written.
77 * \throws std::bad_alloc if out of memory.
79 void setModuleDisplayName(const std::string &name);
80 //! Sets whether hidden options should be shown in help output.
81 void setShowHidden(bool bHidden);
83 //! Returns the lower-level context for writing the help.
84 const HelpWriterContext &writerContext() const;
86 * Returns a display name for the module for which help is being written.
90 const char *moduleDisplayName() const;
91 //! Returns whether hidden options should be shown in help output.
92 bool showHidden() const;
97 PrivateImplPointer<Impl> impl_;
100 /*! \libinternal \brief
101 * Helper for passing CommandLineHelpContext into parse_common_args().
103 * This class provides a mechanism to set and retrieve a global
104 * CommandLineHelpContext object. It is used to pass this object into
105 * parse_common_args() from CommandLineModuleManager::runAsMainCMain() through
106 * the main() function that is not aware of the wrapper binary mechanism.
107 * It is not thread-safe because in this limited use case, it is always called
108 * from a single-threaded context.
111 * \ingroup module_onlinehelp
113 class GlobalCommandLineHelpContext
116 //! Returns the global context, or NULL if not set.
117 static const CommandLineHelpContext *get();
120 * Sets the global context for the scope.
122 * The global context is cleared when this object goes out of scope.
124 * It is an error to have more than one GlobalCommandLineHelpContext
125 * object in existence at the same time.
127 explicit GlobalCommandLineHelpContext(const CommandLineHelpContext &context);
128 //! Clears the global context.
129 ~GlobalCommandLineHelpContext();