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31 /*! \libinternal \file
33 * Declares common string formatting routines for online help.
35 * \author Teemu Murtola <teemu.murtola@cbr.su.se>
37 * \ingroup module_utility
39 #ifndef GMX_ONLINEHELP_HELPFORMAT_H
40 #define GMX_ONLINEHELP_HELPFORMAT_H
44 #include "../utility/common.h"
52 /*! \libinternal \brief
53 * Substitute markup used in help text for console output.
55 * \param[in] text Text to substitute.
56 * \returns \p text with markup substituted.
57 * \throws std::bad_alloc if out of memory.
61 std::string substituteMarkupForConsole(const std::string &text);
62 /*! \libinternal \brief
63 * Format a help text block for console output.
65 * \param file File to write the formatted text to.
66 * \param[in] text Text to format.
67 * \throws std::bad_alloc if out of memory.
68 * \throws FileIOError on any I/O error.
70 * Calls substituteMarkupForConsole(), and also wraps the lines to 78
75 void writeHelpTextForConsole(File *file, const std::string &text);
78 /*! \libinternal \brief
79 * Formats rows of a table for text output.
81 * This utility class formats tabular data, mainly for console output.
82 * Each row in the table can take multiple lines, and automatic text wrapping
83 * is supported. If text overflows the allocated width, the remaining columns
84 * on that line become shifted. To avoid this, it is possible to start the
85 * output for different columns from different lines (it is the caller's
86 * responsibility to check that overflows are avoided or are acceptable).
88 * Column definitions are first set with addColumn().
89 * To format a fow, first call clear(). Then call addColumnLine() to add text
90 * to each column (can be called multiple times on a single column to add
91 * multiple lines), and possibly setColumnFirstLineOffset() to adjust the line
92 * from which the column output should start. Finally, call formatRow() to
93 * obtain the formatted row.
95 * A header (column titles and a horizontal line) is printed before the first
100 gmx::TextTableFormatter formatter;
101 formatter.addColumn("Name", 10, false);
102 formatter.addColumn("Type", 10, false);
103 formatter.addColumn("Description", 50, true);
106 formatter.addColumnLine(0, "name");
107 formatter.addColumnLine(1, "type");
108 formatter.addColumnLine(2, "Description for name");
109 printf("%s", formatter.formatRow().c_str());
112 formatter.addColumnLine(0, "averylongname");
113 formatter.addColumnLine(1, "type");
114 formatter.setColumnFirstLineOffset(1, 1);
115 formatter.addColumnLine(2, "Description for name");
116 printf("%s", formatter.formatRow().c_str());
118 // format other rows by repeating the above code
121 * Methods in this class may throw std::bad_alloc if out of memory.
122 * Other exceptions are not thrown.
125 * \ingroup module_onlinehelp
127 class TextTableFormatter
130 //! Constructs an empty formatter.
131 TextTableFormatter();
132 ~TextTableFormatter();
135 * Adds a column to the table.
137 * \param[in] title Title string for the column (used for header).
138 * \param[in] width Width of the column (must be > 0).
139 * \param[in] bWrap Whether text that exceeds \p width is
140 * automatically wrapped.
142 * The length of \p title must not exceed \p width.
144 void addColumn(const char *title, int width, bool bWrap);
147 * Whether formatRow() has been successfully called.
149 * This method can be used to determine after-the-fact whether anything
150 * was written in the table.
154 bool didOutput() const;
157 * Removes all text from all columns and resets the line offsets.
159 * Removes all text added using addColumnLine() and resets line offsets
160 * set with setColumnFirstLineOffset() to zero.
161 * Should be called before starting to add data for a row.
167 * Adds text to be printed in a column.
169 * \param[in] index Zero-based column index.
170 * \param[in] text Text to add.
172 * Can be called multiple times. Additional calls append \p text as
173 * additional lines. Any calls with \p text empty have no effect.
174 * To add an empty line, use "\n" as \p text.
176 * If \p text contains newlines, the text is automatically splitted to
177 * multiple lines. The same happens if automatic wrapping is on for
178 * the column and the text contains lines that are longer than what
181 void addColumnLine(int index, const std::string &text);
183 * Sets the first line to which text is printed for a column.
185 * \param[in] index Zero-based column index.
186 * \param[in] firstLine Zero-based line index from which to start the
189 * Can be called if there is no text for column \p index.
190 * Does not affect the output in this case.
194 void setColumnFirstLineOffset(int index, int firstLine);
196 * Formats the lines for the current row.
198 * \returns Current row formatted as a single string
199 * (contains newlines).
201 * Formats the data as set after the previous clear()/formatRow() using
202 * addColumnLine() and setColumnFirstLineOffset().
204 * If this is the first line to be formatted, a header is also added to
205 * the beginning of the returned string.
207 * The return value always terminates with a newline.
209 * Calls clear() on successful return.
211 std::string formatRow();
214 * Returns the last line on which column \p index has text.
216 * \param[in] index Zero-based column index.
217 * \returns Last line index (zero-based) on which \p index has text.
219 * The return value is the sum of the number of lines added with
220 * addColumnLine() (taking into account possible wrapping) and the line
221 * offset set with setColumnFirstLineOffset().
225 int lastColumnLine(int index) const;
230 PrivateImplPointer<Impl> impl_;