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// This file is part of The New Aspell
// Copyright (C) 2001 by Kevin Atkinson under the GNU LGPL license
// version 2.0 or 2.1. You should have received a copy of the LGPL
// license along with this library if you did not you can find
// it at http://www.gnu.org/.
#include "asc_ctype.hpp"
#include "config.hpp"
#include "string.hpp"
#include "indiv_filter.hpp"
#include "string_map.hpp"
#include "vector.hpp"
namespace {
using namespace acommon;
class TexInfoFilter : public IndividualFilter
{
private:
struct Command {
bool ignore;
Command(bool i = false) : ignore(i) {}
};
struct Table {
String name;
bool ignore_item;
Table(String n) : name(n), ignore_item(false) {}
};
String last_command;
String env_command;
int env_ignore;
int ignore;
bool in_line_command;
bool seen_input;
Vector<Command> stack;
Vector<Table> table_stack;
StringMap to_ignore;
StringMap to_ignore_env;
void reset_stack();
public:
PosibErr<bool> setup(Config *);
void reset();
void process(FilterChar * &, FilterChar * &);
};
//
//
//
PosibErr<bool> TexInfoFilter::setup(Config * opts)
{
name_ = "texinfo-filter";
order_num_ = 0.35;
to_ignore.clear();
opts->retrieve_list("f-texinfo-ignore", &to_ignore);
opts->retrieve_list("f-texinfo-ignore-env", &to_ignore_env);
reset();
return true;
}
void TexInfoFilter::reset_stack()
{
stack.clear();
stack.push_back(Command());
in_line_command = false;
ignore = 0;
}
void TexInfoFilter::reset()
{
reset_stack();
seen_input = false;
env_command.clear();
env_ignore = 0;
table_stack.clear();
table_stack.push_back(Table(""));
}
void TexInfoFilter::process(FilterChar * & str, FilterChar * & stop)
{
FilterChar * cur = str;
while (cur != stop) {
if (*cur == ' ') {
++cur;
} else if (*cur == '@') {
*cur = ' ';
++cur;
if (cur == stop) break;
if (asc_isalpha(*cur)) {
bool was_table = last_command == table_stack.back().name
&& (last_command == "table" || last_command == "ftable"
|| last_command == "vtable");
last_command.clear();
while (cur != stop && asc_isalpha(*cur)) {
last_command += *cur;
*cur = ' ';
++cur;
}
if (env_ignore) {
// do nothing
} else if (was_table) {
if (to_ignore.have(last_command))
table_stack.back().ignore_item = true;
} else {
if (cur == stop || *cur != '{')
in_line_command = true;
else
++cur;
if (to_ignore.have(last_command)
|| (table_stack.back().ignore_item
&& (last_command == "item" || last_command == "itemx")))
{
stack.push_back(Command(true));
++ignore;
} else {
stack.push_back(Command(false));
}
if (last_command == "end") {
// do nothing as end command is special
} else if (env_command.empty() && to_ignore_env.have(last_command)) {
env_command = last_command;
env_ignore = 1;
} else if (env_command == last_command) {
env_ignore++;
} else if (last_command.suffix("table")) {
table_stack.push_back(last_command);
}
}
} else {
*cur = ' ';
++cur;
}
} else if (!seen_input && *cur == '\\' && stop - cur >= 6
&& cur[1] == 'i' && cur[2] == 'n' && cur[3] == 'p'
&& cur[4] == 'u' && cur[5] == 't') {
last_command.clear();
for (int i = 0; i != 6; ++i)
*cur++ = ' ';
stack.push_back(Command(true));
++ignore;
in_line_command = true;
seen_input = true;
++cur;
} else if (last_command == "end") {
last_command.clear();
while (cur != stop && asc_isalpha(*cur)) {
last_command += *cur;
*cur = ' ';
++cur;
}
if (last_command == env_command) {
--env_ignore;
if (env_ignore <= 0) {
env_ignore = 0;
env_command.clear();
}
} else if (last_command == table_stack.back().name) {
table_stack.pop_back();
if (table_stack.empty()) table_stack.push_back(Table(""));
}
last_command.clear();
} else {
last_command.clear();
if (*cur == '{') {
stack.push_back(Command());
} else if (*cur == '}') {
if (stack.back().ignore) {
--ignore;
if (ignore < 0) ignore = 0;
}
stack.pop_back();
if (stack.empty())
stack.push_back(Command());
} else if (in_line_command && *cur == '\n') {
reset_stack();
} else if (ignore || env_ignore) {
*cur = ' ';
}
++cur;
}
}
}
}
C_EXPORT
IndividualFilter * new_aspell_texinfo_filter() {return new TexInfoFilter;}
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