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svg_parse_value - add 'px' unit, report trailing garbage

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- avoid operator comma in semantic action, refs #3249
This commit is contained in:
Mickey Rose 2016-01-23 20:44:14 +01:00
parent 05b66fc355
commit 8d7fca3236
1 changed files with 16 additions and 9 deletions
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25
src/svg/svg_parser.cpp
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@ -137,29 +137,36 @@ double parse_double(T & error_messages, const char* str)
template <typename T, int DPI = 90>
double parse_svg_value(T & error_messages, const char* str, bool & percent)
{
using namespace boost::spirit::qi;
using skip_type = boost::spirit::ascii::space_type;
using boost::phoenix::ref;
double_type double_;
char_type char_;
_1_type _1;
qi::double_type double_;
qi::lit_type lit;
qi::_1_type _1;
double val = 0.0;
symbols<char, double> units;
qi::symbols<char, double> units;
units.add
("px", 1.0)
("pt", DPI/72.0)
("pc", DPI/6.0)
("mm", DPI/25.4)
("cm", DPI/2.54)
("in", (double)DPI)
;
if (!phrase_parse(str, str + std::strlen(str),
double_[ref(val) = _1, ref(percent) = false]
const char* cur = str; // phrase_parse modifies the first iterator
const char* end = str + std::strlen(str);
if (!qi::phrase_parse(cur, end,
double_[ref(val) = _1][ref(percent) = false]
> - (units[ ref(val) *= _1]
|
char_('%')[ref(val) *= 0.01, ref(percent) = true]),
lit('%')[ref(val) *= 0.01][ref(percent) = true]),
skip_type()))
{
error_messages.emplace_back("Failed to parse SVG value: \"" + std::string(str) + "\"");
error_messages.emplace_back("Failed to parse SVG value: '" + std::string(str) + "'");
}
else if (cur != end)
{
error_messages.emplace_back("Failed to parse SVG value: '" + std::string(str) +
"', trailing garbage: '" + cur + "'");
}
return val;
}