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//
// 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() || 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 || !(*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(¶ms);
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, ¶ms);
}
// 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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