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35 /*! \libinternal \file
37 * Declares gmx::HelpWriterContext.
39 * \author Teemu Murtola <teemu.murtola@gmail.com>
41 * \ingroup module_onlinehelp
43 #ifndef GMX_ONLINEHELP_HELPWRITERCONTEXT_H
44 #define GMX_ONLINEHELP_HELPWRITERCONTEXT_H
49 #include "../utility/common.h"
55 class TextLineWrapperSettings;
58 //! \libinternal Output format for help writing.
61 eHelpOutputFormat_Console, //!< Plain text directly on the console.
62 eHelpOutputFormat_Man, //!< Man page.
63 eHelpOutputFormat_Html, //!< Html output for online manual.
64 eHelpOutputFormat_NR //!< Used for the number of output formats.
68 /*! \libinternal \brief
69 * Hyperlink data for writing out help.
71 * This class is separate from HelpWriterContext to allow constructing the list
72 * of links once and reusing them across multiple help writer contexts.
73 * This is used when exporting all the help from the wrapper binary to avoid
74 * repeatedly constructing the same data structure for each help item.
76 * While the links are in principle independent of the output format, the
77 * constructor takes the output format to be able to preformat the links,
78 * avoiding repeated processing during markup substitution. Could be hidden
79 * behind the scenes in HelpWriterContext, but that would complicate the
82 * \ingroup module_onlinehelp
88 * Initializes an empty links collection for the given output format.
90 explicit HelpLinks(HelpOutputFormat format);
96 * \param[in] linkName Name of the link in input text.
97 * \param[in] targetName Hyperlink target.
98 * \param[in] displayName Text to show as the link.
100 * Any occurrence of \p linkName in the text passed to markup
101 * substitution methods in HelpWriterContext is made into a hyperlink
102 * to \p targetName if the markup format supports that.
104 void addLink(const std::string &linkName,
105 const std::string &targetName,
106 const std::string &displayName);
111 PrivateImplPointer<Impl> impl_;
113 //! Allows the context to use the links.
114 friend class HelpWriterContext;
117 /*! \libinternal \brief
118 * Context information for writing out help.
120 * The purpose of this class is to pass information about the output format to
121 * methods that write help, and to abstract away most of the details of
122 * different output formats.
124 * The state of a context object (excluding the fact that the output file is
125 * written to) does not change after initial construction of the object.
126 * Copying creates a context object that shares state with the source.
128 * TODO: This class will need additional work as part of Redmine issue #969.
131 * \ingroup module_onlinehelp
133 class HelpWriterContext
137 * Initializes a context with the given output file and format.
139 * \throws std::bad_alloc if out of memory.
141 HelpWriterContext(File *file, HelpOutputFormat format);
143 * Initializes a context with the given output file, format and links.
145 * \throws std::bad_alloc if out of memory.
147 * A reference to \p links is stored until the HelpWriterContext
148 * is destructed. The caller is responsible for ensuring that the
149 * links object remains valid long enough.
151 HelpWriterContext(File *file, HelpOutputFormat format,
152 const HelpLinks *links);
153 //! Creates a copy of the context.
154 HelpWriterContext(const HelpWriterContext &other);
155 ~HelpWriterContext();
158 * Adds a string replacement for markup subsitution.
160 * \param[in] search Text to replace in input.
161 * \param[in] replace Text that each occurrence of \p search is
163 * \throws std::bad_alloc if out of memory.
166 * Improve semantics if the same \p search item is set multiple
169 void setReplacement(const std::string &search,
170 const std::string &replace);
173 * Returns the active output format.
177 HelpOutputFormat outputFormat() const;
179 * Returns the raw output file for writing the help.
181 * Using this file directly should be avoided, as it requires one to
182 * have different code for each output format.
183 * Using other methods in this class should be preferred.
187 File &outputFile() const;
190 * Substitutes markup used in help text and wraps lines.
192 * \param[in] settings Line wrapper settings.
193 * \param[in] text Text to substitute.
194 * \returns \p text with markup substituted and wrapped.
195 * \throws std::bad_alloc if out of memory.
197 * \see TextLineWrapper::wrapToString()
200 substituteMarkupAndWrapToString(const TextLineWrapperSettings &settings,
201 const std::string &text) const;
203 * Substitutes markup used in help text and wraps lines.
205 * \param[in] settings Line wrapper settings.
206 * \param[in] text Text to substitute.
207 * \returns \p text with markup substituted and wrapped as a list of
209 * \throws std::bad_alloc if out of memory.
211 * \see TextLineWrapper::wrapToVector()
213 std::vector<std::string>
214 substituteMarkupAndWrapToVector(const TextLineWrapperSettings &settings,
215 const std::string &text) const;
217 * Writes a title for the current help topic.
219 * \param[in] title Title to write.
220 * \throws std::bad_alloc if out of memory.
221 * \throws FileIOError on any I/O error.
223 void writeTitle(const std::string &title) const;
225 * Writes a formatted text block into the output.
227 * \param[in] text Text to format.
228 * \throws std::bad_alloc if out of memory.
229 * \throws FileIOError on any I/O error.
231 * Convenience function that calls substituteMarkupAndWrapToString()
232 * and writes the result directly to the output file.
234 void writeTextBlock(const std::string &text) const;
236 * Writes a formatted text block into the output.
238 * \param[in] settings Line wrapper settings.
239 * \param[in] text Text to format.
240 * \throws std::bad_alloc if out of memory.
241 * \throws FileIOError on any I/O error.
243 * Convenience function that calls substituteMarkupAndWrapToString()
244 * and writes the result directly to the output file.
246 void writeTextBlock(const TextLineWrapperSettings &settings,
247 const std::string &text) const;
253 * Constructs a context object with the given implementation class.
255 * \param[in] impl Implementation object.
259 explicit HelpWriterContext(Impl *impl);
261 PrivateImplPointer<Impl> impl_;
263 GMX_DISALLOW_ASSIGN(HelpWriterContext);