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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-04 17:44:55 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-04 17:44:55 +0000
commit5068d34c08f951a7ea6257d305a1627b09a95817 (patch)
tree08213e2be853396a3b07ce15dbe222644dcd9a89 /src/third-party/CLI/FormatterFwd.hpp
parentInitial commit. (diff)
downloadlnav-upstream.tar.xz
lnav-upstream.zip
Adding upstream version 0.11.1.upstream/0.11.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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+// Copyright (c) 2017-2022, University of Cincinnati, developed by Henry Schreiner
+// under NSF AWARD 1414736 and by the respective contributors.
+// All rights reserved.
+//
+// SPDX-License-Identifier: BSD-3-Clause
+
+#pragma once
+
+// [CLI11:public_includes:set]
+#include <map>
+#include <string>
+#include <utility>
+#include <vector>
+// [CLI11:public_includes:end]
+
+#include "StringTools.hpp"
+
+namespace CLI {
+// [CLI11:formatter_fwd_hpp:verbatim]
+
+class Option;
+class App;
+
+/// This enum signifies the type of help requested
+///
+/// This is passed in by App; all user classes must accept this as
+/// the second argument.
+
+enum class AppFormatMode {
+ Normal, ///< The normal, detailed help
+ All, ///< A fully expanded help
+ Sub, ///< Used when printed as part of expanded subcommand
+};
+
+/// This is the minimum requirements to run a formatter.
+///
+/// A user can subclass this is if they do not care at all
+/// about the structure in CLI::Formatter.
+class FormatterBase {
+ protected:
+ /// @name Options
+ ///@{
+
+ /// The width of the first column
+ std::size_t column_width_{30};
+
+ /// @brief The required help printout labels (user changeable)
+ /// Values are Needs, Excludes, etc.
+ std::map<std::string, std::string> labels_{};
+
+ ///@}
+ /// @name Basic
+ ///@{
+
+ public:
+ FormatterBase() = default;
+ FormatterBase(const FormatterBase &) = default;
+ FormatterBase(FormatterBase &&) = default;
+
+ /// Adding a destructor in this form to work around bug in GCC 4.7
+ virtual ~FormatterBase() noexcept {} // NOLINT(modernize-use-equals-default)
+
+ /// This is the key method that puts together help
+ virtual std::string make_help(const App *, std::string, AppFormatMode) const = 0;
+
+ ///@}
+ /// @name Setters
+ ///@{
+
+ /// Set the "REQUIRED" label
+ void label(std::string key, std::string val) { labels_[key] = val; }
+
+ /// Set the column width
+ void column_width(std::size_t val) { column_width_ = val; }
+
+ ///@}
+ /// @name Getters
+ ///@{
+
+ /// Get the current value of a name (REQUIRED, etc.)
+ std::string get_label(std::string key) const {
+ if(labels_.find(key) == labels_.end())
+ return key;
+ else
+ return labels_.at(key);
+ }
+
+ /// Get the current column width
+ std::size_t get_column_width() const { return column_width_; }
+
+ ///@}
+};
+
+/// This is a specialty override for lambda functions
+class FormatterLambda final : public FormatterBase {
+ using funct_t = std::function<std::string(const App *, std::string, AppFormatMode)>;
+
+ /// The lambda to hold and run
+ funct_t lambda_;
+
+ public:
+ /// Create a FormatterLambda with a lambda function
+ explicit FormatterLambda(funct_t funct) : lambda_(std::move(funct)) {}
+
+ /// Adding a destructor (mostly to make GCC 4.7 happy)
+ ~FormatterLambda() noexcept override {} // NOLINT(modernize-use-equals-default)
+
+ /// This will simply call the lambda function
+ std::string make_help(const App *app, std::string name, AppFormatMode mode) const override {
+ return lambda_(app, name, mode);
+ }
+};
+
+/// This is the default Formatter for CLI11. It pretty prints help output, and is broken into quite a few
+/// overridable methods, to be highly customizable with minimal effort.
+class Formatter : public FormatterBase {
+ public:
+ Formatter() = default;
+ Formatter(const Formatter &) = default;
+ Formatter(Formatter &&) = default;
+
+ /// @name Overridables
+ ///@{
+
+ /// This prints out a group of options with title
+ ///
+ virtual std::string make_group(std::string group, bool is_positional, std::vector<const Option *> opts) const;
+
+ /// This prints out just the positionals "group"
+ virtual std::string make_positionals(const App *app) const;
+
+ /// This prints out all the groups of options
+ std::string make_groups(const App *app, AppFormatMode mode) const;
+
+ /// This prints out all the subcommands
+ virtual std::string make_subcommands(const App *app, AppFormatMode mode) const;
+
+ /// This prints out a subcommand
+ virtual std::string make_subcommand(const App *sub) const;
+
+ /// This prints out a subcommand in help-all
+ virtual std::string make_expanded(const App *sub) const;
+
+ /// This prints out all the groups of options
+ virtual std::string make_footer(const App *app) const;
+
+ /// This displays the description line
+ virtual std::string make_description(const App *app) const;
+
+ /// This displays the usage line
+ virtual std::string make_usage(const App *app, std::string name) const;
+
+ /// This puts everything together
+ std::string make_help(const App * /*app*/, std::string, AppFormatMode) const override;
+
+ ///@}
+ /// @name Options
+ ///@{
+
+ /// This prints out an option help line, either positional or optional form
+ virtual std::string make_option(const Option *opt, bool is_positional) const {
+ std::stringstream out;
+ detail::format_help(
+ out, make_option_name(opt, is_positional) + make_option_opts(opt), make_option_desc(opt), column_width_);
+ return out.str();
+ }
+
+ /// @brief This is the name part of an option, Default: left column
+ virtual std::string make_option_name(const Option *, bool) const;
+
+ /// @brief This is the options part of the name, Default: combined into left column
+ virtual std::string make_option_opts(const Option *) const;
+
+ /// @brief This is the description. Default: Right column, on new line if left column too large
+ virtual std::string make_option_desc(const Option *) const;
+
+ /// @brief This is used to print the name on the USAGE line
+ virtual std::string make_option_usage(const Option *opt) const;
+
+ ///@}
+};
+
+// [CLI11:formatter_fwd_hpp:end]
+} // namespace CLI