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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
48 #include "gromacs/onlinehelp/helpwritercontext.h"
49 #include "gromacs/utility/classhelpers.h"
54 class ShellCompletionWriter
;
56 /*! \libinternal \brief
57 * Context information for writing out command-line help.
59 * This class wraps a HelpWriterContext, extending it with information specific
60 * for command-line help export. This way, code using only the routines in the
61 * onlinehelp module is not exposed to extra features of the command-line help
64 * Copying a context works like with HelpWriterContext: the output file and
65 * most state is shared. However, setModuleDisplayName() and setShowHidden()
66 * can be set independently for the child context. Defaults for these options
67 * are inherited from the parent.
69 * \ingroup module_commandline
71 class CommandLineHelpContext
75 * Creates a context for help export.
77 * Wraps the constructor of HelpWriterContext.
79 CommandLineHelpContext(TextOutputStream
*stream
,
80 HelpOutputFormat format
, const HelpLinks
*links
,
81 const std::string
&programName
);
82 //! Creates a context for a particular HelpWriterContext.
83 explicit CommandLineHelpContext(const HelpWriterContext
&writerContext
);
85 * Creates a context for shell completion.
87 explicit CommandLineHelpContext(ShellCompletionWriter
*writer
);
88 //! Creates a copy of the context.
89 explicit CommandLineHelpContext(const CommandLineHelpContext
&other
);
90 //! Moves the context.
91 CommandLineHelpContext(CommandLineHelpContext
&&other
);
92 //! Move-assigns the context.
93 CommandLineHelpContext
&operator=(CommandLineHelpContext
&&other
);
94 ~CommandLineHelpContext();
97 * Sets a display name for the module for which help is being written.
99 * \throws std::bad_alloc if out of memory.
101 void setModuleDisplayName(const std::string
&name
);
102 //! Sets whether hidden options should be shown in help output.
103 void setShowHidden(bool bHidden
);
104 //! \copydoc HelpWriterContext::enterSubSection()
105 void enterSubSection(const std::string
&title
);
107 //! Returns the lower-level context for writing the help.
108 const HelpWriterContext
&writerContext() const;
110 * Returns a display name for the module for which help is being written.
114 const char *moduleDisplayName() const;
115 //! Returns whether hidden options should be shown in help output.
116 bool showHidden() const;
117 //! Returns whether this context is for exporting shell completions.
118 bool isCompletionExport() const;
120 * Returns the shell completion writer for this context.
122 * Can only be called if isCompletionExport() returns `true`.
124 ShellCompletionWriter
&shellCompletionWriter() const;
129 PrivateImplPointer
<Impl
> impl_
;
131 GMX_DISALLOW_ASSIGN(CommandLineHelpContext
);
134 /*! \libinternal \brief
135 * Helper for passing CommandLineHelpContext into parse_common_args().
137 * This class provides a mechanism to set and retrieve a global
138 * CommandLineHelpContext object. It is used to pass this object into
139 * parse_common_args() from CommandLineModuleManager::runAsMainCMain() through
140 * the main() function that is not aware of the wrapper binary mechanism.
141 * It is not thread-safe because in this limited use case, it is always called
142 * from a single-threaded context.
145 * \ingroup module_onlinehelp
147 class GlobalCommandLineHelpContext
150 //! Returns the global context, or NULL if not set.
151 static const CommandLineHelpContext
*get();
154 * Sets the global context for the scope.
156 * The global context is cleared when this object goes out of scope.
158 * It is an error to have more than one GlobalCommandLineHelpContext
159 * object in existence at the same time.
161 explicit GlobalCommandLineHelpContext(const CommandLineHelpContext
&context
);
162 //! Clears the global context.
163 ~GlobalCommandLineHelpContext();