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387 lines (354 loc) · 8.27 KB
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//
// PageReader.cpp
//
// $Id: //poco/1.4/PageCompiler/src/PageReader.cpp#1 $
//
// Copyright (c) 2008, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#include "PageReader.h"
#include "Page.h"
#include "Poco/FileStream.h"
#include "Poco/CountingStream.h"
#include "Poco/Path.h"
#include "Poco/Exception.h"
#include "Poco/Ascii.h"
const std::string PageReader::MARKUP_BEGIN("\tresponseStream << \"");
const std::string PageReader::MARKUP_END("\";\n");
const std::string PageReader::EXPR_BEGIN("\tresponseStream << (");
const std::string PageReader::EXPR_END(");\n");
PageReader::PageReader(Page& page, const std::string& path):
_page(page),
_pParent(0),
_path(path),
_line(0),
_emitLineDirectives(false)
{
_attrs.reserve(4096);
}
PageReader::PageReader(const PageReader& parent, const std::string& path):
_page(parent._page),
_pParent(&parent),
_path(path),
_line(0),
_emitLineDirectives(false)
{
_attrs.reserve(4096);
}
PageReader::~PageReader()
{
}
void PageReader::emitLineDirectives(bool flag)
{
_emitLineDirectives = flag;
}
void PageReader::parse(std::istream& pageStream)
{
ParsingState state = STATE_MARKUP;
_page.handler() << MARKUP_BEGIN;
Poco::CountingInputStream countingPageStream(pageStream);
std::string token;
nextToken(countingPageStream, token);
while (!token.empty())
{
_line = countingPageStream.getCurrentLineNumber();
if (token == "<%")
{
if (state == STATE_MARKUP)
{
_page.handler() << MARKUP_END;
generateLineDirective(_page.handler());
state = STATE_BLOCK;
}
else _page.handler() << token;
}
else if (token == "<%%")
{
if (state == STATE_MARKUP)
{
_page.handler() << MARKUP_END;
generateLineDirective(_page.preHandler());
state = STATE_PREHANDLER;
}
else _page.handler() << token;
}
else if (token == "<%!")
{
if (state == STATE_MARKUP)
{
_page.handler() << MARKUP_END;
generateLineDirective(_page.implDecls());
state = STATE_IMPLDECL;
}
else _page.handler() << token;
}
else if (token == "<%!!")
{
if (state == STATE_MARKUP)
{
_page.handler() << MARKUP_END;
generateLineDirective(_page.headerDecls());
state = STATE_HDRDECL;
}
else _page.handler() << token;
}
else if (token == "<%--")
{
if (state == STATE_MARKUP)
{
_page.handler() << MARKUP_END;
state = STATE_COMMENT;
}
else _page.handler() << token;
}
else if (token == "<%@")
{
if (state == STATE_MARKUP)
{
_page.handler() << MARKUP_END;
state = STATE_ATTR;
_attrs.clear();
}
else _page.handler() << token;
}
else if (token == "<%=")
{
if (state == STATE_MARKUP)
{
_page.handler() << MARKUP_END;
generateLineDirective(_page.handler());
_page.handler() << EXPR_BEGIN;
state = STATE_EXPR;
}
else _page.handler() << token;
}
else if (token == "%>")
{
if (state == STATE_EXPR)
{
_page.handler() << EXPR_END;
_page.handler() << MARKUP_BEGIN;
state = STATE_MARKUP;
}
else if (state == STATE_ATTR)
{
parseAttributes();
_attrs.clear();
_page.handler() << MARKUP_BEGIN;
state = STATE_MARKUP;
}
else if (state != STATE_MARKUP)
{
_page.handler() << MARKUP_BEGIN;
state = STATE_MARKUP;
}
else _page.handler() << token;
}
else
{
switch (state)
{
case STATE_MARKUP:
if (token == "\n")
{
_page.handler() << "\\n";
_page.handler() << MARKUP_END;
_page.handler() << MARKUP_BEGIN;
}
else if (token == "\t")
{
_page.handler() << "\\t";
}
else if (token == "\"")
{
_page.handler() << "\\\"";
}
else if (token != "\r")
{
_page.handler() << token;
}
break;
case STATE_IMPLDECL:
_page.implDecls() << token;
break;
case STATE_HDRDECL:
_page.headerDecls() << token;
break;
case STATE_PREHANDLER:
_page.preHandler() << token;
break;
case STATE_BLOCK:
_page.handler() << token;
break;
case STATE_EXPR:
_page.handler() << token;
break;
case STATE_COMMENT:
break;
case STATE_ATTR:
_attrs += token;
break;
}
}
nextToken(countingPageStream, token);
}
if (state == STATE_MARKUP)
{
_page.handler() << MARKUP_END;
}
else throw Poco::SyntaxException("unclosed meta or code block", where());
}
void PageReader::parseAttributes()
{
static const int eof = std::char_traits<char>::eof();
std::string basename;
std::istringstream istr(_attrs);
int ch = istr.get();
while (ch != eof && Poco::Ascii::isSpace(ch)) ch = istr.get();
while (ch != eof && Poco::Ascii::isAlphaNumeric(ch)) { basename += (char) ch; ch = istr.get(); }
while (ch != eof && Poco::Ascii::isSpace(ch)) ch = istr.get();
while (ch != eof)
{
std::string name(basename + ".");
std::string value;
while (ch != eof && Poco::Ascii::isAlphaNumeric(ch)) { name += (char) ch; ch = istr.get(); }
while (ch != eof && Poco::Ascii::isSpace(ch)) ch = istr.get();
if (ch != '=') throw Poco::SyntaxException("bad attribute syntax: '=' expected", where());
ch = istr.get();
while (ch != eof && Poco::Ascii::isSpace(ch)) ch = istr.get();
if (ch == '"')
{
ch = istr.get();
while (ch != eof && ch != '"') { value += (char) ch; ch = istr.get(); }
if (ch != '"') throw Poco::SyntaxException("bad attribute syntax: '\"' expected", where());
}
else if (ch == '\'')
{
ch = istr.get();
while (ch != eof && ch != '\'') { value += (char) ch; ch = istr.get(); }
if (ch != '\'') throw Poco::SyntaxException("bad attribute syntax: ''' expected", where());
}
else throw Poco::SyntaxException("bad attribute syntax: '\"' or ''' expected", where());
ch = istr.get();
handleAttribute(name, value);
while (ch != eof && Poco::Ascii::isSpace(ch)) ch = istr.get();
}
}
void PageReader::nextToken(std::istream& istr, std::string& token)
{
token.clear();
int ch = istr.get();
if (ch != -1)
{
if (ch == '<' && istr.peek() == '%')
{
token += "<%";
istr.get();
ch = istr.peek();
switch (ch)
{
case '%':
case '@':
case '=':
ch = istr.get();
token += (char) ch;
break;
case '!':
ch = istr.get();
token += (char) ch;
if (istr.peek() == '!')
{
ch = istr.get();
token += (char) ch;
}
break;
case '-':
ch = istr.get();
token += (char) ch;
if (istr.peek() == '-')
{
ch = istr.get();
token += (char) ch;
}
break;
}
}
else if (ch == '%' && istr.peek() == '>')
{
token += "%>";
istr.get();
}
else token += (char) ch;
}
}
void PageReader::handleAttribute(const std::string& name, const std::string& value)
{
if (name == "include.page")
{
include(value);
}
else if (name == "header.include")
{
_page.headerDecls() << "#include \"" << value << "\"\n";
}
else if (name == "header.sinclude")
{
_page.headerDecls() << "#include <" << value << ">\n";
}
else if (name == "impl.include")
{
_page.implDecls() << "#include \"" << value << "\"\n";
}
else if (name == "impl.sinclude")
{
_page.implDecls() << "#include <" << value << ">\n";
}
else
{
_page.set(name, value);
}
}
void PageReader::include(const std::string& path)
{
Poco::Path currentPath(_path);
Poco::Path includePath(path);
currentPath.resolve(includePath);
_page.handler() << "\t// begin include " << currentPath.toString() << "\n";
Poco::FileInputStream includeStream(currentPath.toString());
PageReader includeReader(*this, currentPath.toString());
includeReader.emitLineDirectives(_emitLineDirectives);
includeReader.parse(includeStream);
_page.handler() << "\t// end include " << currentPath.toString() << "\n";
}
std::string PageReader::where() const
{
std::stringstream result;
result << "in file '" << _path << "', line " << _line;
const PageReader* pParent = _pParent;
while (pParent)
{
result << "\n\tincluded from file '"<< pParent->_path << "', line " << pParent->_line;
pParent = pParent->_pParent;
}
return result.str();
}
void PageReader::generateLineDirective(std::ostream& ostr)
{
if (_emitLineDirectives)
{
Poco::Path p(_path);
p.makeAbsolute();
std::string absPath = p.toString();
ostr << "#line " << _line << " \"";
for (std::string::const_iterator it = absPath.begin(); it != absPath.end(); ++it)
{
if (*it == '\\')
ostr << "\\\\";
else
ostr << *it;
}
ostr << "\"\n";
}
}
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