src/gromacs/commandline/cmdlinehelpmodule.h

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  35 /*! \internal \file
  36  * \brief
  37  * Declares gmx::CommandLineHelpModule.
  38  *
  39  * \author Teemu Murtola <teemu.murtola@gmail.com>
  40  * \ingroup module_commandline
  41  */
  42 #ifndef GMX_COMMANDLINE_CMDLINEHELPMODULE_H
  43 #define GMX_COMMANDLINE_CMDLINEHELPMODULE_H
  44
  45 #include "gromacs/commandline/cmdlinemodule.h"
  46 #include "gromacs/onlinehelp/ihelptopic.h"
  47 #include "gromacs/utility/classhelpers.h"
  48
  49 #include "cmdlinemodulemanager_impl.h"
  50
  51 namespace gmx
  52 {
  53
  54 class CommandLineHelpContext;
  55 class IFileOutputRedirector;
  56 class IProgramContext;
  57
  58 class CommandLineHelpModuleImpl;
  59
  60 /*! \internal
  61  * \brief
  62  * Command-line module for producing help.
  63  *
  64  * This module implements the 'help' subcommand that is automatically added by
  65  * CommandLineModuleManager.
  66  *
  67  * \ingroup module_commandline
  68  */
  69 class CommandLineHelpModule : public ICommandLineModule
  70 {
  71     public:
  72         /*! \brief
  73          * Creates a command-line help module.
  74          *
  75          * \param[in] programContext Information about the running binary.
  76          * \param[in] binaryName     Name of the running binary
  77          *     (without Gromacs binary suffix or .exe on Windows).
  78          * \param[in] modules  List of modules for to use for module listings.
  79          * \param[in] groups   List of module groups.
  80          * \throws    std::bad_alloc if out of memory.
  81          */
  82         CommandLineHelpModule(const IProgramContext            &programContext,
  83                               const std::string                &binaryName,
  84                               const CommandLineModuleMap       &modules,
  85                               const CommandLineModuleGroupList &groups);
  86         ~CommandLineHelpModule() override;
  87
  88         /*! \brief
  89          * Creates a help topic for a command-line module.
  90          *
  91          * \param[in] module  Module the create the help topic for.
  92          * \throws    std::bad_alloc if out of memory.
  93          *
  94          * The caller should add the topic using addTopic() if that is desired.
  95          * This method is provided separately to allow for strong exception
  96          * safety in CommandLineModuleManager::addModule().
  97          */
  98         HelpTopicPointer
  99         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
 129         {
 130             return "Print help information";
 131         }
 132
 133         void init(CommandLineModuleSettings *settings) override
 134         {
 135             settings->setDefaultNiceLevel(0);
 136         }
 137         int run(int argc, char *argv[]) override;
 138         void writeHelp(const CommandLineHelpContext &context) const override;
 139
 140     private:
 141         typedef CommandLineHelpModuleImpl Impl;
 142
 143         PrivateImplPointer<Impl> impl_;
 144 };
 145
 146 } // namespace gmx
 147
 148 #endif