src/gromacs/commandline/cmdlinehelpmodule.h

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  36 /*! \internal \file
  37  * \brief
  38  * Declares gmx::CommandLineHelpModule.
  39  *
  40  * \author Teemu Murtola <teemu.murtola@gmail.com>
  41  * \ingroup module_commandline
  42  */
  43 #ifndef GMX_COMMANDLINE_CMDLINEHELPMODULE_H
  44 #define GMX_COMMANDLINE_CMDLINEHELPMODULE_H
  45
  46 #include "gromacs/commandline/cmdlinemodule.h"
  47 #include "gromacs/onlinehelp/ihelptopic.h"
  48 #include "gromacs/utility/classhelpers.h"
  49
  50 #include "cmdlinemodulemanager_impl.h"
  51
  52 namespace gmx
  53 {
  54
  55 class CommandLineHelpContext;
  56 class IFileOutputRedirector;
  57 class IProgramContext;
  58
  59 class CommandLineHelpModuleImpl;
  60
  61 /*! \internal
  62  * \brief
  63  * Command-line module for producing help.
  64  *
  65  * This module implements the 'help' subcommand that is automatically added by
  66  * CommandLineModuleManager.
  67  *
  68  * \ingroup module_commandline
  69  */
  70 class CommandLineHelpModule : public ICommandLineModule
  71 {
  72 public:
  73     /*! \brief
  74      * Creates a command-line help module.
  75      *
  76      * \param[in] programContext Information about the running binary.
  77      * \param[in] binaryName     Name of the running binary
  78      *     (without Gromacs binary suffix or .exe on Windows).
  79      * \param[in] modules  List of modules for to use for module listings.
  80      * \param[in] groups   List of module groups.
  81      * \throws    std::bad_alloc if out of memory.
  82      */
  83     CommandLineHelpModule(const IProgramContext&            programContext,
  84                           const std::string&                binaryName,
  85                           const CommandLineModuleMap&       modules,
  86                           const CommandLineModuleGroupList& groups);
  87     ~CommandLineHelpModule() override;
  88
  89     /*! \brief
  90      * Creates a help topic for a command-line module.
  91      *
  92      * \param[in] module  Module the create the help topic for.
  93      * \throws    std::bad_alloc if out of memory.
  94      *
  95      * The caller should add the topic using addTopic() if that is desired.
  96      * This method is provided separately to allow for strong exception
  97      * safety in CommandLineModuleManager::addModule().
  98      */
  99     HelpTopicPointer createModuleHelpTopic(const ICommandLineModule& module) const;
 100     /*! \brief
 101      * Adds a top-level help topic.
 102      *
 103      * \param[in] topic     Help topic to add.
 104      * \param[in] bExported Whether this topic will be directly exported to
 105      *     the user guide.
 106      * \throws    std::bad_alloc if out of memory.
 107      */
 108     void addTopic(HelpTopicPointer topic, bool bExported);
 109     //! Sets whether hidden options will be shown in help.
 110     void setShowHidden(bool bHidden);
 111     /*! \brief
 112      * Sets an override to show the help for the given module.
 113      *
 114      * If called, the help module directly prints the help for the given
 115      * module when called, skipping any other processing.
 116      */
 117     void setModuleOverride(const ICommandLineModule& module);
 118
 119     /*! \brief
 120      * Sets a file redirector for writing help output.
 121      *
 122      * Used for unit testing; see
 123      * CommandLineModuleManager::setOutputRedirector() for more details.
 124      */
 125     void setOutputRedirector(IFileOutputRedirector* output);
 126
 127     const char* name() const override { return "help"; }
 128     const char* shortDescription() const override { return "Print help information"; }
 129
 130     void init(CommandLineModuleSettings* settings) override { settings->setDefaultNiceLevel(0); }
 131     int  run(int argc, char* argv[]) override;
 132     void writeHelp(const CommandLineHelpContext& context) const override;
 133
 134 private:
 135     typedef CommandLineHelpModuleImpl Impl;
 136
 137     PrivateImplPointer<Impl> impl_;
 138 };
 139
 140 } // namespace gmx
 141
 142 #endif