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37 * Implements gmx::HelpWriterContext.
39 * \author Teemu Murtola <teemu.murtola@gmail.com>
40 * \ingroup module_onlinehelp
44 #include "helpwritercontext.h"
53 #include "gromacs/onlinehelp/helpformat.h"
54 #include "gromacs/utility/exceptions.h"
55 #include "gromacs/utility/gmxassert.h"
56 #include "gromacs/utility/programcontext.h"
57 #include "gromacs/utility/stringutil.h"
58 #include "gromacs/utility/textwriter.h"
60 #include "rstparser.h"
68 //! \internal \addtogroup module_onlinehelp
71 //! Characters used for reStructuredText title underlining.
72 const char g_titleChars[] = "=-^*~+#'_.";
80 /* The order of these arrays is significant. Text search and replace
81 * for each element occurs in order, so earlier changes can induce
82 * subsequent changes even though the original text might not appear
83 * to invoke the latter changes.
84 * TODO: Get rid of this behavior. It makes it very difficult to manage
85 * replacements coming from multiple sources (e.g., hyperlinks).*/
87 //! List of replacements for console output.
88 const t_sandr sandrTty[] = {
89 { "\\*", "*" }, { "\\=", "=" }, { "[REF]", "" }, { "[ref]", "" },
90 { "[TT]", "" }, { "[tt]", "" }, { "[BB]", "" }, { "[bb]", "" },
91 { "[IT]", "" }, { "[it]", "" }, { "[MATH]", "" }, { "[math]", "" },
92 { "[CHEVRON]", "<" }, { "[chevron]", ">" }, { "[MAG]", "|" }, { "[mag]", "|" },
93 { "[INT]", "integral" }, { "[FROM]", " from " }, { "[from]", "" }, { "[TO]", " to " },
94 { "[to]", " of" }, { "[int]", "" }, { "[SUM]", "sum" }, { "[sum]", "" },
95 { "[SUB]", "_" }, { "[sub]", "" }, { "[SQRT]", "sqrt(" }, { "[sqrt]", ")" },
96 { "[EXP]", "exp(" }, { "[exp]", ")" }, { "[LN]", "ln(" }, { "[ln]", ")" },
97 { "[LOG]", "log(" }, { "[log]", ")" }, { "[COS]", "cos(" }, { "[cos]", ")" },
98 { "[SIN]", "sin(" }, { "[sin]", ")" }, { "[TAN]", "tan(" }, { "[tan]", ")" },
99 { "[COSH]", "cosh(" }, { "[cosh]", ")" }, { "[SINH]", "sinh(" }, { "[sinh]", ")" },
100 { "[TANH]", "tanh(" }, { "[tanh]", ")" }, { "[PAR]", "\n\n" }, { "[GRK]", "" },
104 //! List of replacements for reStructuredText output.
105 const t_sandr sandrRst[] = {
106 { "[TT]", "``" }, { "[tt]", "``" }, { "[BB]", "**" }, { "[bb]", "**" },
107 { "[IT]", "*" }, { "[it]", "*" }, { "[MATH]", "" }, { "[math]", "" },
108 { "[CHEVRON]", "<" }, { "[chevron]", ">" }, { "[MAG]", "\\|" }, { "[mag]", "\\|" },
109 { "[INT]", "integral" }, { "[FROM]", " from " }, { "[from]", "" }, { "[TO]", " to " },
110 { "[to]", " of" }, { "[int]", "" }, { "[SUM]", "sum" }, { "[sum]", "" },
111 { "[SUB]", "_" }, { "[sub]", "" }, { "[SQRT]", "sqrt(" }, { "[sqrt]", ")" },
112 { "[EXP]", "exp(" }, { "[exp]", ")" }, { "[LN]", "ln(" }, { "[ln]", ")" },
113 { "[LOG]", "log(" }, { "[log]", ")" }, { "[COS]", "cos(" }, { "[cos]", ")" },
114 { "[SIN]", "sin(" }, { "[sin]", ")" }, { "[TAN]", "tan(" }, { "[tan]", ")" },
115 { "[COSH]", "cosh(" }, { "[cosh]", ")" }, { "[SINH]", "sinh(" }, { "[sinh]", ")" },
116 { "[TANH]", "tanh(" }, { "[tanh]", ")" }, { "[PAR]", "\n\n" }, { "[GRK]", "" },
121 * Replaces all entries from a list of replacements.
123 std::string repall(const std::string& s, int nsr, const t_sandr sa[])
125 std::string result(s);
126 for (int i = 0; i < nsr; ++i)
128 result = replaceAll(result, sa[i].search, sa[i].replace);
134 * Replaces all entries from a list of replacements.
137 std::string repall(const std::string& s, const t_sandr (&sa)[nsr])
139 return repall(s, nsr, sa);
143 * Custom output interface for HelpWriterContext::Impl::processMarkup().
145 * Provides an interface that is used to implement different types of output
146 * from HelpWriterContext::Impl::processMarkup().
151 virtual ~IWrapper() {}
154 * Provides the wrapping settings.
156 * HelpWriterContext::Impl::processMarkup() may provide some default
157 * values for the settings if they are not set; this is the reason the
158 * return value is not const.
160 virtual TextLineWrapperSettings& settings() = 0;
161 //! Appends the given string to output.
162 virtual void wrap(const std::string& text) = 0;
166 * Wraps markup output into a single string.
168 class WrapperToString : public IWrapper
171 //! Creates a wrapper with the given settings.
172 explicit WrapperToString(const TextLineWrapperSettings& settings) : wrapper_(settings) {}
174 TextLineWrapperSettings& settings() override { return wrapper_.settings(); }
175 void wrap(const std::string& text) override { result_.append(wrapper_.wrapToString(text)); }
176 //! Returns the result string.
177 const std::string& result() const { return result_; }
180 TextLineWrapper wrapper_;
185 * Wraps markup output into a vector of string (one line per element).
187 class WrapperToVector : public IWrapper
190 //! Creates a wrapper with the given settings.
191 explicit WrapperToVector(const TextLineWrapperSettings& settings) : wrapper_(settings) {}
193 TextLineWrapperSettings& settings() override { return wrapper_.settings(); }
194 void wrap(const std::string& text) override
196 const std::vector<std::string>& lines = wrapper_.wrapToVector(text);
197 result_.insert(result_.end(), lines.begin(), lines.end());
199 //! Returns a vector with the output lines.
200 const std::vector<std::string>& result() const { return result_; }
203 TextLineWrapper wrapper_;
204 std::vector<std::string> result_;
208 * Makes the string uppercase.
210 * \param[in] text Input text.
211 * \returns \p text with all characters transformed to uppercase.
212 * \throws std::bad_alloc if out of memory.
214 std::string toUpperCase(const std::string& text)
216 std::string result(text);
217 std::transform(result.begin(), result.end(), result.begin(), toupper);
222 * Removes extra newlines from reStructuredText.
224 * \param[in] text Input text.
225 * \returns \p text with all sequences of more than two newlines replaced
226 * with just two newlines.
227 * \throws std::bad_alloc if out of memory.
229 std::string removeExtraNewlinesRst(const std::string& text)
231 // Start from 2, so that all newlines in the beginning get stripped off.
232 int newlineCount = 2;
234 result.reserve(text.length());
235 for (size_t i = 0; i < text.length(); ++i)
240 if (newlineCount > 2)
249 result.push_back(text[i]);
251 size_t last = result.find_last_not_of('\n');
252 if (last != std::string::npos)
254 result.resize(last + 1);
263 /********************************************************************
268 * Private implementation class for HelpLinks.
270 * \ingroup module_onlinehelp
272 class HelpLinks::Impl
277 LinkItem(const std::string& linkName, const std::string& replacement) :
279 replacement(replacement)
282 std::string linkName;
283 std::string replacement;
286 //! Shorthand for a list of links.
287 typedef std::vector<LinkItem> LinkList;
289 //! Initializes empty links with the given format.
290 explicit Impl(HelpOutputFormat format) : format_(format) {}
294 //! Output format for which the links are formatted.
295 HelpOutputFormat format_;
298 /********************************************************************
302 HelpLinks::HelpLinks(HelpOutputFormat format) : impl_(new Impl(format)) {}
304 HelpLinks::~HelpLinks() {}
306 void HelpLinks::addLink(const std::string& linkName, const std::string& targetName, const std::string& displayName)
308 std::string replacement;
309 switch (impl_->format_)
311 case eHelpOutputFormat_Console: replacement = repall(displayName, sandrTty); break;
312 case eHelpOutputFormat_Rst: replacement = targetName; break;
313 default: GMX_RELEASE_ASSERT(false, "Output format not implemented for links");
315 impl_->links_.emplace_back(linkName, replacement);
318 /********************************************************************
319 * HelpWriterContext::Impl
323 * Private implementation class for HelpWriterContext.
325 * \ingroup module_onlinehelp
327 class HelpWriterContext::Impl
331 * Shared, non-modifiable state for context objects.
333 * Contents of this structure are shared between all context objects
334 * that are created from a common parent.
335 * This state should not be modified after construction.
337 * \ingroup module_onlinehelp
342 //! Initializes the state with the given parameters.
343 SharedState(TextWriter* writer, HelpOutputFormat format, const HelpLinks* links) :
351 * Returns a formatter for formatting options lists for console
354 * The formatter is lazily initialized on first access.
356 TextTableFormatter& consoleOptionsFormatter() const
358 GMX_RELEASE_ASSERT(format_ == eHelpOutputFormat_Console,
359 "Accessing console formatter for non-console output");
360 if (!consoleOptionsFormatter_)
362 consoleOptionsFormatter_ = std::make_unique<TextTableFormatter>();
363 consoleOptionsFormatter_->setFirstColumnIndent(1);
364 consoleOptionsFormatter_->addColumn(nullptr, 7, false);
365 consoleOptionsFormatter_->addColumn(nullptr, 18, false);
366 consoleOptionsFormatter_->addColumn(nullptr, 16, false);
367 consoleOptionsFormatter_->addColumn(nullptr, 28, false);
369 return *consoleOptionsFormatter_;
372 //! Writer for writing the help.
374 //! Output format for the help output.
375 HelpOutputFormat format_;
377 const HelpLinks* links_;
380 //! Formatter for console output options.
381 // Never releases ownership.
382 mutable std::unique_ptr<TextTableFormatter> consoleOptionsFormatter_;
384 GMX_DISALLOW_COPY_AND_ASSIGN(SharedState);
389 ReplaceItem(const std::string& search, const std::string& replace) :
398 //! Smart pointer type for managing the shared state.
399 typedef std::shared_ptr<const SharedState> StatePointer;
400 //! Shorthand for a list of markup/other replacements.
401 typedef std::vector<ReplaceItem> ReplaceList;
403 //! Initializes the context with the given state and section depth.
404 Impl(const StatePointer& state, int sectionDepth) : state_(state), sectionDepth_(sectionDepth)
407 //! Copies the context.
408 Impl(const Impl&) = default;
410 //! Adds a new replacement.
411 void addReplacement(const std::string& search, const std::string& replace)
413 replacements_.emplace_back(search, replace);
416 //! Replaces links in a given string.
417 std::string replaceLinks(const std::string& input) const;
420 * Process markup and wrap lines within a block of text.
422 * \param[in] text Text to process.
423 * \param wrapper Object used to wrap the text.
425 * The \p wrapper should take care of either writing the text to output
426 * or providing an interface for the caller to retrieve the output.
428 void processMarkup(const std::string& text, IWrapper* wrapper) const;
430 //! Constant state shared by all child context objects.
432 //! List of markup/other replacements.
433 ReplaceList replacements_;
434 //! Number of subsections above this context.
438 GMX_DISALLOW_ASSIGN(Impl);
441 std::string HelpWriterContext::Impl::replaceLinks(const std::string& input) const
443 std::string result(input);
444 if (state_->links_ != nullptr)
446 HelpLinks::Impl::LinkList::const_iterator link;
447 for (link = state_->links_->impl_->links_.begin();
448 link != state_->links_->impl_->links_.end(); ++link)
450 result = replaceAllWords(result, link->linkName, link->replacement);
456 void HelpWriterContext::Impl::processMarkup(const std::string& text, IWrapper* wrapper) const
458 std::string result(text);
459 for (ReplaceList::const_iterator i = replacements_.begin(); i != replacements_.end(); ++i)
461 result = replaceAll(result, i->search, i->replace);
463 switch (state_->format_)
465 case eHelpOutputFormat_Console:
467 const int baseFirstLineIndent = wrapper->settings().firstLineIndent();
468 const int baseIndent = wrapper->settings().indent();
469 result = repall(result, sandrTty);
470 result = replaceLinks(result);
471 std::string paragraph;
472 paragraph.reserve(result.length());
473 RstParagraphIterator iter(result);
474 while (iter.nextParagraph())
476 iter.getParagraphText(¶graph);
477 wrapper->settings().setFirstLineIndent(baseFirstLineIndent + iter.firstLineIndent());
478 wrapper->settings().setIndent(baseIndent + iter.indent());
479 wrapper->wrap(paragraph);
481 wrapper->settings().setFirstLineIndent(baseFirstLineIndent);
482 wrapper->settings().setIndent(baseIndent);
485 case eHelpOutputFormat_Rst:
487 result = repall(result, sandrRst);
488 result = replaceLinks(result);
489 result = replaceAll(result, "[REF]", "");
490 result = replaceAll(result, "[ref]", "");
491 result = removeExtraNewlinesRst(result);
492 wrapper->wrap(result);
495 default: GMX_THROW(InternalError("Invalid help output format"));
499 /********************************************************************
503 HelpWriterContext::HelpWriterContext(TextWriter* writer, HelpOutputFormat format) :
504 impl_(new Impl(Impl::StatePointer(new Impl::SharedState(writer, format, nullptr)), 0))
508 HelpWriterContext::HelpWriterContext(TextWriter* writer, HelpOutputFormat format, const HelpLinks* links) :
509 impl_(new Impl(Impl::StatePointer(new Impl::SharedState(writer, format, links)), 0))
511 if (links != nullptr)
513 GMX_RELEASE_ASSERT(links->impl_->format_ == format,
514 "Links must have the same output format as the context");
518 HelpWriterContext::HelpWriterContext(Impl* impl) : impl_(impl) {}
520 HelpWriterContext::HelpWriterContext(const HelpWriterContext& other) : impl_(new Impl(*other.impl_))
524 HelpWriterContext::~HelpWriterContext() {}
526 void HelpWriterContext::setReplacement(const std::string& search, const std::string& replace)
528 impl_->addReplacement(search, replace);
531 HelpOutputFormat HelpWriterContext::outputFormat() const
533 return impl_->state_->format_;
536 TextWriter& HelpWriterContext::outputFile() const
538 return impl_->state_->file_;
541 void HelpWriterContext::enterSubSection(const std::string& title)
543 GMX_RELEASE_ASSERT(impl_->sectionDepth_ - 1 < static_cast<int>(std::strlen(g_titleChars)),
544 "Too deeply nested subsections");
546 ++impl_->sectionDepth_;
549 std::string HelpWriterContext::substituteMarkupAndWrapToString(const TextLineWrapperSettings& settings,
550 const std::string& text) const
552 WrapperToString wrapper(settings);
553 impl_->processMarkup(text, &wrapper);
554 return wrapper.result();
557 std::vector<std::string> HelpWriterContext::substituteMarkupAndWrapToVector(const TextLineWrapperSettings& settings,
558 const std::string& text) const
560 WrapperToVector wrapper(settings);
561 impl_->processMarkup(text, &wrapper);
562 return wrapper.result();
565 void HelpWriterContext::writeTitle(const std::string& title) const
571 TextWriter& file = outputFile();
572 file.ensureEmptyLine();
573 switch (outputFormat())
575 case eHelpOutputFormat_Console: file.writeLine(toUpperCase(title)); break;
576 case eHelpOutputFormat_Rst:
577 file.writeLine(title);
578 file.writeLine(std::string(title.length(), g_titleChars[impl_->sectionDepth_]));
580 default: GMX_THROW(NotImplementedError("This output format is not implemented"));
582 file.ensureEmptyLine();
585 void HelpWriterContext::writeTextBlock(const std::string& text) const
587 TextLineWrapperSettings settings;
588 if (outputFormat() == eHelpOutputFormat_Console)
590 settings.setLineLength(78);
592 outputFile().writeLine(substituteMarkupAndWrapToString(settings, text));
595 void HelpWriterContext::paragraphBreak() const
597 outputFile().ensureEmptyLine();
600 void HelpWriterContext::writeOptionListStart() const {}
602 void HelpWriterContext::writeOptionItem(const std::string& name,
603 const std::string& value,
604 const std::string& defaultValue,
605 const std::string& info,
606 const std::string& description) const
608 TextWriter& file = outputFile();
609 switch (outputFormat())
611 case eHelpOutputFormat_Console:
613 TextTableFormatter& formatter(impl_->state_->consoleOptionsFormatter());
615 formatter.addColumnLine(0, name);
616 formatter.addColumnLine(1, value);
617 if (!defaultValue.empty())
619 formatter.addColumnLine(2, "(" + defaultValue + ")");
623 formatter.addColumnLine(3, "(" + info + ")");
625 TextLineWrapperSettings settings;
626 settings.setIndent(11);
627 settings.setLineLength(78);
628 std::string formattedDescription = substituteMarkupAndWrapToString(settings, description);
629 file.writeLine(formatter.formatRow());
630 file.writeLine(formattedDescription);
633 case eHelpOutputFormat_Rst:
635 std::string args(value);
636 if (!defaultValue.empty())
639 args.append(defaultValue);
648 file.writeLine(formatString("``%s`` %s", name.c_str(), args.c_str()));
649 TextLineWrapperSettings settings;
650 settings.setIndent(4);
651 file.writeLine(substituteMarkupAndWrapToString(settings, description));
654 default: GMX_THROW(NotImplementedError("This output format is not implemented"));
658 void HelpWriterContext::writeOptionListEnd() const {}