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/* Filter for DDTP-emails (Debian Description Translation Project).
*
* Copyright (C) 2007, Christer Andersson <klamm@comhem.se>
*
* This filter is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation, either version 2.0 of the License, or
* (at your option) any later version.
*
* This filter is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "settings.h"
#include "indiv_filter.hpp"
#include "key_info.hpp"
using namespace acommon;
namespace {
class DDTPFilter : public IndividualFilter
{
public:
DDTPFilter() : IndividualFilter() {}
virtual ~DDTPFilter() {}
virtual PosibErr<bool> setup(Config *);
virtual void reset();
virtual void process(FilterChar * & start, FilterChar * & stop);
protected:
enum po_filter_state {
STATE_COMMENT, // state: comment (don't check)
STATE_ORIGINAL, // state: original text (don't check)
STATE_TRANSLATED // state: translated text (do check)
} state;
// Set to true when the last character read is a line-break.
// States only change at the beginning of lines.
bool prev_char_newline;
};
PosibErr<bool>
DDTPFilter::setup(Config *config)
{
name_ = "ddtp-filter";
order_num_ = 0.90;
reset();
return true;
}
void
DDTPFilter::reset()
{
prev_char_newline=true;
state = STATE_TRANSLATED;
}
void
DDTPFilter::process(FilterChar * & start, FilterChar * & stop)
{
FilterChar *i = start; // Current position in text
FilterChar *eol; // Next end-of-line or end of text
// Identify end-of-line if the previous text chunk did not include one.
for ( eol = i ; eol != stop && *eol != '\n' ; eol++ );
while ( i != stop ) {
// Iterate over entire text chunk.
if ( prev_char_newline ) {
// Handle beginning of new lines.
prev_char_newline = false;
// Swallow leading whitespace. With the current formatting of
// DDTP-emails this isn't really necessary.
while ( i != stop
&& ( *i == ' ' || *i == '\t' || *i == '\r'
|| *i == '\f' || *i == '\v' ) )
++i;
// Determine end of this line.
for ( eol = i ; eol != stop && *eol != '\n' ; eol++ );
// Check for literals:
// '#' Comments
// 'Description:' Begin original message
// 'Description-LANG.ENC:' Begin translated message
if ( *i == '#' ) {
state = STATE_COMMENT;
}
else if ( eol-i >= 12
&& i[0] == 'D' && i[1] == 'e' && i[2] == 's' && i[3] == 'c'
&& i[4] == 'r' && i[5] == 'i' && i[6] == 'p' && i[7] == 't'
&& i[8] == 'i' && i[9] == 'o' && i[10] == 'n'
&& (i[11] == ':' || i[11] == '-') ) {
if (i[11] == ':')
state = STATE_ORIGINAL;
else
state = STATE_TRANSLATED;
// Blank out keyword.
for ( ; i != eol && *i != ':' ; i++)
*i = ' ';
if ( i != eol )
*i = ' '; // Colon
}
}
// Process current line.
if (state == STATE_TRANSLATED) {
i = eol;
}
else {
for ( ; i != eol ; i++ )
*i = ' ';
}
if (eol != stop) {
// More text to process. Move to next line and continue.
i++;
prev_char_newline = true;
}
}
}
}
C_EXPORT
IndividualFilter* new_aspell_ddtp_filter() {
return new DDTPFilter;
}
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