//
// C++ Implementation: SourceFileHighlighter
//
// Description:
//
//
// Author: Lorenzo Bettini <http://www.lorenzobettini.it>, (C) 2008
//
// Copyright: See COPYING file that comes with this distribution
//
//
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <iostream>
#include <fstream>
#include "sourcefilehighlighter.h"
#include "sourcehighlighter.h"
#include "formatterparams.h"
#include "bufferedoutput.h"
#include "preformatter.h"
#include "formatter.h"
#include "linenumgenerator.h"
#include <sstream>
#include "ioexception.h"
#include "lineranges.h"
#include "regexranges.h"
using namespace std;
namespace srchilite {
typedef enum {
 FOUND_EOF = 0, FOUND_NL, FOUND_END
} load_line_ret;
static load_line_ret load_line(std::string& s, std::istream& is);
SourceFileHighlighter::SourceFileHighlighter(const std::string &file,
 SourceHighlighter *_sourceHighlighter, BufferedOutput *_output) :
 fileName(file), sourceHighlighter(_sourceHighlighter), output(_output),
 debugPolicy(NO_DEBUG), preformatter(0), lineNumGenerator(0),
 lineRanges(0), regexRanges(0), contextFormatter(0) {
}
load_line_ret load_line(std::string& s, std::istream& is) {
 s.erase();
 if (is.bad() &#124;&#124; is.eof())
 return FOUND_EOF;
 char c;
 while (is.get(c)) {
 if (c == '\n')
 return FOUND_NL;
 if (c != '\r')
 s.append(1, c);
 }
 return FOUND_END;
}
void SourceFileHighlighter::setRangeSeparator(const std::string &rangeSep) {
 if (preformatter) {
 rangeSeparator = preformatter->preformat(rangeSep + "\n");
 } else {
 rangeSeparator = rangeSep + "\n";
 }
}
void SourceFileHighlighter::highlight() {
 istream *is = 0;
 if (fileName != "") {
 is = new ifstream(fileName.c_str());
 if (!is &#124;&#124; !(*is)) {
 throw IOException("cannot open for input", fileName);
 }
 } else
 is = &cin;
 highlight(*is);
 if (fileName != "")
 delete is;
}
void SourceFileHighlighter::highlight(istream &is) {
 std::string s;
 FormatterParams params(fileName);
 params.line = 1;
 bool rangeSeparatorPrinted = false;
 sourceHighlighter->setFormatterParams(&params);
 sourceHighlighter->setSuspended(false);
 // if we have a LineRanges, make sure we reset it
 if (lineRanges) {
 lineRanges->reset();
 }
 if (regexRanges) {
 regexRanges->reset();
 }
 load_line_ret ret;
 RangeResult rangeResult = IN_RANGE;
 while ((ret = load_line(s, is)) != FOUND_EOF) {
 // first check whether we must highlight only a specific range of lines
 if (lineRanges) {
 rangeResult = lineRanges->isInRange(params.line);
 if (rangeResult == IN_RANGE) {
 sourceHighlighter->setSuspended(false);
 rangeSeparatorPrinted = false;
 } else {
 sourceHighlighter->setSuspended(true);
 }
 } else if (regexRanges) {
 // we assume that regex range is set only if line range is not set
 if (regexRanges->isInRange(s)) {
 rangeResult = IN_RANGE;
 sourceHighlighter->setSuspended(false);
 } else {
 rangeResult = NOT_IN_RANGE;
 sourceHighlighter->setSuspended(true);
 }
 }
 if (rangeResult != NOT_IN_RANGE) {
 output->output(linePrefix);
 if (lineNumGenerator) {
 output->output(lineNumGenerator->generateLine(params.line));
 }
 } else {
 // check whether we must print the range separator
 if (!rangeSeparatorPrinted && params.line != 1) {
 if (rangeSeparator.size()) {
 output->output(linePrefix);
 output->output(rangeSeparator);
 rangeSeparatorPrinted = true;
 }
 }
 }
 if (rangeResult == CONTEXT_RANGE) {
 // the whole line must be formatted using the "context" style
 contextFormatter->format(s, &params);
 }
 // highlighting must be performed anyway, since this will keep track
 // of the current state; if we've set suspended, simply no output will be produced
 sourceHighlighter->highlightParagraph(s);
 if (rangeResult != NOT_IN_RANGE) {
 // format the newline
 if (ret == FOUND_NL) {
 // the newline char is not highlighted, but only generated
 // possibly after a transformation
 output->output((preformatter ? preformatter->preformat("\n")
 : "\n"));
 }
 output->writePostLine(linePrefix);
 }
 (params.line)++;
 }
 output->writePostDoc(linePrefix);
}
void SourceFileHighlighter::highlight(const string &s) {
 istringstream is(s);
 highlight(is);
}
}
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