235 lines
7 KiB
C++
235 lines
7 KiB
C++
// Copyright (c) 2012, Thomas Goyne <plorkyeran@aegisub.org>
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//
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// Permission to use, copy, modify, and distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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//
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// Aegisub Project http://www.aegisub.org/
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#include "../config.h"
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#include "parser.h"
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#include "libaegisub/color.h"
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#include "libaegisub/ass/dialogue_parser.h"
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#include <boost/spirit/include/qi.hpp>
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#include <boost/spirit/include/phoenix_core.hpp>
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#include <boost/spirit/include/phoenix_operator.hpp>
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#include <boost/spirit/include/phoenix_fusion.hpp>
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#include <boost/fusion/include/adapt_struct.hpp>
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#include <boost/spirit/include/lex_lexertl.hpp>
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#include <boost/spirit/home/phoenix/statement.hpp>
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BOOST_FUSION_ADAPT_STRUCT(
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agi::Color,
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(unsigned char, r)
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(unsigned char, g)
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(unsigned char, b)
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(unsigned char, a)
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)
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namespace {
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using namespace boost::spirit;
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/// Convert a abgr value in an int or unsigned int to an agi::Color
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struct unpack_colors : public boost::static_visitor<agi::Color> {
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template<typename T> struct result { typedef agi::Color type; };
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template<class T> agi::Color operator()(T arg) const {
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return boost::apply_visitor(*this, arg);
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}
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agi::Color operator()(int abgr) const { return (*this)((unsigned)abgr); }
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agi::Color operator()(unsigned int abgr) const {
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return agi::Color(abgr & 0xFF, (abgr >> 8) & 0xFF, (abgr >> 16) & 0xFF, (abgr >> 24) & 0xFF);
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}
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};
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template<typename Iterator>
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struct color_grammar : qi::grammar<Iterator, agi::Color()> {
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qi::rule<Iterator, agi::Color()> color;
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qi::rule<Iterator, agi::Color()> css_color;
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qi::rule<Iterator, agi::Color()> ass_color;
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qi::rule<Iterator, unsigned char()> rgb_component;
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qi::rule<Iterator, unsigned char()> rgb_percent;
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qi::rule<Iterator, unsigned char()> hex_byte;
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qi::rule<Iterator, unsigned char()> hex_char;
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qi::rule<Iterator> comma;
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qi::rule<Iterator> blank;
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#define HEX_PARSER(type, len) qi::uint_parser<unsigned type, 16, len, len>()
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color_grammar() : color_grammar::base_type(color) {
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color = css_color | ass_color;
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boost::phoenix::function<unpack_colors> unpack;
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// Order is important here; int_ (for SSA) needs to come before the ASS
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// option as decimal numbers of the appropriate length are also valid
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// hex numbers
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// ASS with alpha needs to come before ASS without alpha for the same
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// reason
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ass_color = (
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int_
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| -lit('&') >> -(lit('H') | lit('h')) >> (HEX_PARSER(int, 8) | HEX_PARSER(int, 6)) >> -lit('&')
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)[_val = unpack(_1)] >> blank >> qi::eoi;
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css_color
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= "rgb(" >> blank >> rgb_component >> comma >> rgb_component >> comma >> rgb_component >> blank >> ')'
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| '#' >> hex_byte >> hex_byte >> hex_byte
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| '#' >> hex_char >> hex_char >> hex_char
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;
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hex_char = HEX_PARSER(int, 1)[_val = _1 * 16 + _1];
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hex_byte = HEX_PARSER(int, 2);
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rgb_component = qi::uint_parser<unsigned char, 10, 1, 3>();
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comma = *qi::blank >> "," >> *qi::blank;
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blank = *qi::blank;
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}
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};
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template <typename Lexer>
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struct dialogue_tokens : lex::lexer<Lexer> {
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int paren_depth;
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template<typename KT>
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void init(KT &&kara_templater) {
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using lex::_state;
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using lex::char_;
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using lex::string;
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using namespace boost::phoenix;
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using namespace agi::ass::DialogueTokenType;
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this->self
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= string("\\\\[nNh]", LINE_BREAK)
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| char_('{', OVR_BEGIN)[ref(paren_depth) = 0, _state = "OVR"]
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| kara_templater
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| string(".", TEXT)
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;
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this->self("OVR")
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= char_('{', ERROR)
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| char_('}', OVR_END)[_state = "INITIAL"]
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| char_('\\', TAG_START)[_state = "TAGSTART"]
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| string("\\s+", WHITESPACE)
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| kara_templater
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| string(".", COMMENT)
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;
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this->self("ARG")
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= char_('{', ERROR)
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| char_('}', OVR_END)[_state = "INITIAL"]
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| char_('(', OPEN_PAREN)[++ref(paren_depth)]
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| char_(')', CLOSE_PAREN)[--ref(paren_depth), if_(ref(paren_depth) == 0)[_state = "OVR"]]
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| char_('\\', TAG_START)[_state = "TAGSTART"]
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| char_(',', ARG_SEP)
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| string("\\s+", WHITESPACE)
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| string(".", ARG)
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| kara_templater
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;
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this->self("TAGSTART")
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= string("\\s+", WHITESPACE)
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| string("r|fn", TAG_NAME)[_state = "ARG"]
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| char_('\\', TAG_START)
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| char_('}', OVR_END)[_state = "INITIAL"]
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| string("[a-z0-9]", TAG_NAME)[_state = "TAGNAME"]
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| string(".", COMMENT)[_state = "OVR"]
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| kara_templater
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;
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this->self("TAGNAME")
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= string("[a-z]+", TAG_NAME)[_state = "ARG"]
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| char_('(', OPEN_PAREN)[++ref(paren_depth), _state = "ARG"]
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| char_(')', CLOSE_PAREN)[--ref(paren_depth), if_(ref(paren_depth) == 0)[_state = "OVR"]]
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| char_('}', OVR_END)[_state = "INITIAL"]
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| char_('\\', TAG_START)[_state = "TAGSTART"]
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| string(".", ARG)[_state = "ARG"]
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| kara_templater
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;
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}
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dialogue_tokens(bool karaoke_templater) : paren_depth(0) {
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using lex::string;
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using namespace agi::ass::DialogueTokenType;
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if (karaoke_templater)
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init(string("![^!]*!", KARAOKE_TEMPLATE) | string("\\$[A-Za-z_]+", KARAOKE_VARIABLE));
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else
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init(lex::char_('\1'));
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}
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};
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template<typename Parser, typename T>
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bool do_try_parse(std::string const& str, Parser parser, T *out) {
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using namespace boost::spirit::qi;
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T res;
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char const* cstr = str.c_str();
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bool parsed = parse(cstr, cstr + str.size(), parser, res);
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if (parsed && cstr == &str[str.size()]) {
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*out = res;
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return true;
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}
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return false;
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}
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}
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namespace agi {
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namespace parser {
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bool parse(Color &dst, std::string const& str) {
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std::string::const_iterator begin = str.begin();
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bool parsed = parse(begin, str.end(), color_grammar<std::string::const_iterator>(), dst);
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return parsed && begin == str.end();
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}
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}
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namespace ass {
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std::vector<DialogueToken> TokenizeDialogueBody(std::string const& str, bool karaoke_templater) {
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dialogue_tokens<lex::lexertl::actor_lexer<>> tokenizer(karaoke_templater);
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char const* first = str.c_str();
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char const* last = first + str.size();
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std::vector<DialogueToken> data;
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auto it = tokenizer.begin(first, last), end = tokenizer.end();
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for (; it != end && token_is_valid(*it); ++it) {
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int id = it->id();
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ptrdiff_t len = it->value().end() - it->value().begin();
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assert(len > 0);
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if (data.empty() || data.back().type != id)
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data.push_back(DialogueToken(id, len));
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else
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data.back().length += len;
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}
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return data;
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}
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}
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namespace util {
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// from util.h
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bool try_parse(std::string const& str, double *out) {
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return do_try_parse(str, boost::spirit::qi::double_, out);
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}
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bool try_parse(std::string const& str, int *out) {
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return do_try_parse(str, boost::spirit::qi::int_, out);
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}
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}
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}
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