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/******************************************************************************
*
*
*
* Copyright (C) 1997-2015 by Dimitri van Heesch.
*
* Permission to use, copy, modify, and distribute this software and its
* documentation under the terms of the GNU General Public License is hereby
* granted. No representations are made about the suitability of this software
* for any purpose. It is provided "as is" without express or implied warranty.
* See the GNU General Public License for more details.
*
* Documents produced by Doxygen are derivative works derived from the
* input used in their production; they are not affected by this license.
*
*/
#ifndef PARSERINTF_H
#define PARSERINTF_H
#include <qdict.h>
#include <qstrlist.h>
#include <memory>
#include "types.h"
class Entry;
class FileDef;
class CodeOutputInterface;
class MemberDef;
class Definition;
/** \brief Abstract interface for programming language parsers.
*
* By implementing the methods of this interface one can add
* a new language parser to doxygen. The parser can make use of the
* comment block parser to parse the contents of special comment blocks.
*/
class ParserInterface
{
public:
virtual ~ParserInterface() {}
/** Starts processing a translation unit (source files + headers).
* After this call parseInput() is called with sameTranslationUnit
* set to FALSE. If parseInput() returns additional include files,
* these are also processed using parseInput() with
* sameTranslationUnit set to TRUE. After that
* finishTranslationUnit() is called.
*/
virtual void startTranslationUnit(const char *fileName) = 0;
/** Called after all files in a translation unit have been
* processed.
*/
virtual void finishTranslationUnit() = 0;
/** Parses a single input file with the goal to build an Entry tree.
* @param[in] fileName The full name of the file.
* @param[in] fileBuf The contents of the file (zero terminated).
* @param[in,out] root The root of the tree of Entry *nodes
* representing the information extracted from the file.
* @param[in] sameTranslationUnit TRUE if this file was found in the same
* translation unit (in the filesInSameTranslationUnit list
* returned for another file).
* @param[in,out] filesInSameTranslationUnit other files expected to be
* found in the same translation unit (used for libclang)
*/
virtual void parseInput(const char *fileName,
const char *fileBuf,
const std::unique_ptr<Entry> &root,
bool sameTranslationUnit,
QStrList &filesInSameTranslationUnit) = 0;
/** Returns TRUE if the language identified by \a extension needs
* the C preprocessor to be run before feed the result to the input
* parser.
* @see parseInput()
*/
virtual bool needsPreprocessing(const QCString &extension) = 0;
/** Parses a source file or fragment with the goal to produce
* highlighted and cross-referenced output.
* @param[in] codeOutIntf Abstract interface for writing the result.
* @param[in] lang The programming language of the code fragment.
* @param[in] scopeName Name of scope to which the code belongs.
* @param[in] input Actual code in the form of a string
* @param[in] isExampleBlock TRUE iff the code is part of an example.
* @param[in] exampleName Name of the example.
* @param[in] fileDef File definition to which the code
* is associated.
* @param[in] startLine Starting line in case of a code fragment.
* @param[in] endLine Ending line of the code fragment.
* @param[in] inlineFragment Code fragment that is to be shown inline
* as part of the documentation.
* @param[in] memberDef Member definition to which the code
* is associated (non null in case of an inline fragment
* for a member).
* @param[in] showLineNumbers if set to TRUE and also fileDef is not 0,
* line numbers will be added to the source fragment
* @param[in] searchCtx context under which search data has to be stored.
* @param[in] collectXRefs collect cross-reference relations.
*/
virtual void parseCode(CodeOutputInterface &codeOutIntf,
const char *scopeName,
const QCString &input,
SrcLangExt lang,
bool isExampleBlock,
const char *exampleName=0,
FileDef *fileDef=0,
int startLine=-1,
int endLine=-1,
bool inlineFragment=FALSE,
const MemberDef *memberDef=0,
bool showLineNumbers=TRUE,
const Definition *searchCtx=0,
bool collectXRefs=TRUE
) = 0;
/** Resets the state of the code parser.
* Since multiple code fragments can together form a single example, an
* explicit function is used to reset the code parser state.
* @see parseCode()
*/
virtual void resetCodeParserState() = 0;
/** Callback function called by the comment block scanner.
* It provides a string \a text containing the prototype of a function
* or variable. The parser should parse this and store the information
* in the Entry node that corresponds with the node for which the
* comment block parser was invoked.
*/
virtual void parsePrototype(const char *text) = 0;
};
//-----------------------------------------------------------------------------
/** \brief Manages programming language parsers.
*
* This class manages the language parsers in the system. One can
* register parsers, and obtain a parser given a file extension.
*/
class ParserManager
{
public:
/** Creates the parser manager object.
*/
ParserManager()
: m_defaultParser(0) { m_parsers.setAutoDelete(TRUE); }
~ParserManager()
{
delete m_defaultParser;
}
void registerDefaultParser(ParserInterface *parser)
{
m_defaultParser = parser;
}
/** Registers an additional parser.
* @param[in] name A symbolic name of the parser, i.e. "c",
* "python", "fortran", "vhdl", ...
* @param[in] parser The parser that is to be used for the
* given name.
*/
void registerParser(const char *name,ParserInterface *parser)
{
m_parsers.insert(name,parser);
}
/** Registers a file \a extension with a parser with name \a parserName.
* Returns TRUE if the extension was successfully registered.
*/
bool registerExtension(const char *extension, const char *parserName)
{
if (parserName==0 || extension==0) return FALSE;
ParserInterface *intf = m_parsers.find(parserName);
if (intf==0) return FALSE;
if (m_extensions.find(extension)!=0) // extension already exists
{
m_extensions.remove(extension); // remove it
}
m_extensions.insert(extension,intf); // add new mapping
return TRUE;
}
/** Gets the interface to the parser associated with given \a extension.
* If there is no parser explicitly registered for the supplied extension,
* the interface to the default parser will be returned.
*/
ParserInterface *getParser(const char *extension)
{
QCString ext = QCString(extension).lower();
if (ext.isEmpty()) ext=".no_extension";
ParserInterface *intf = m_extensions.find(ext);
if (intf==0 && ext.length()>4)
{
intf = m_extensions.find(ext.left(4));
}
return intf ? intf : m_defaultParser;
}
private:
QDict<ParserInterface> m_parsers;
QDict<ParserInterface> m_extensions;
ParserInterface *m_defaultParser;
};
#endif
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