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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 * Copying a context works like with HelpWriterContext: the output file and
61 * most state is shared. However, setModuleDisplayName() and setShowHidden()
62 * can be set independently for the child context. Defaults for these options
63 * are inherited from the parent.
65 * \ingroup module_commandline
67 class CommandLineHelpContext
71 * Creates the context.
73 * Wraps the constructor of HelpWriterContext.
75 CommandLineHelpContext(File *file, HelpOutputFormat format,
76 const HelpLinks *links);
77 //! Creates a copy of the context.
78 explicit CommandLineHelpContext(const CommandLineHelpContext &other);
79 ~CommandLineHelpContext();
82 * Sets a display name for the module for which help is being written.
84 * \throws std::bad_alloc if out of memory.
86 void setModuleDisplayName(const std::string &name);
87 //! Sets whether hidden options should be shown in help output.
88 void setShowHidden(bool bHidden);
90 //! Returns the lower-level context for writing the help.
91 const HelpWriterContext &writerContext() const;
93 * Returns a display name for the module for which help is being written.
97 const char *moduleDisplayName() const;
98 //! Returns whether hidden options should be shown in help output.
99 bool showHidden() const;
104 PrivateImplPointer<Impl> impl_;
106 GMX_DISALLOW_ASSIGN(CommandLineHelpContext);
109 /*! \libinternal \brief
110 * Helper for passing CommandLineHelpContext into parse_common_args().
112 * This class provides a mechanism to set and retrieve a global
113 * CommandLineHelpContext object. It is used to pass this object into
114 * parse_common_args() from CommandLineModuleManager::runAsMainCMain() through
115 * the main() function that is not aware of the wrapper binary mechanism.
116 * It is not thread-safe because in this limited use case, it is always called
117 * from a single-threaded context.
120 * \ingroup module_onlinehelp
122 class GlobalCommandLineHelpContext
125 //! Returns the global context, or NULL if not set.
126 static const CommandLineHelpContext *get();
129 * Sets the global context for the scope.
131 * The global context is cleared when this object goes out of scope.
133 * It is an error to have more than one GlobalCommandLineHelpContext
134 * object in existence at the same time.
136 explicit GlobalCommandLineHelpContext(const CommandLineHelpContext &context);
137 //! Clears the global context.
138 ~GlobalCommandLineHelpContext();