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/*
* Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/CharacterTypes.h>
#include <AK/GenericLexer.h>
#include <AK/Optional.h>
#include <AK/StringView.h>
#include <LibWeb/SVG/ViewBox.h>
namespace Web::SVG {
Optional<ViewBox> try_parse_view_box(StringView string)
{
// FIXME: This should handle all valid viewBox values.
GenericLexer lexer(string);
enum State {
MinX,
MinY,
Width,
Height,
};
int state { State::MinX };
ViewBox view_box;
while (!lexer.is_eof()) {
lexer.consume_while([](auto ch) { return is_ascii_space(ch); });
auto token = lexer.consume_until([](auto ch) { return is_ascii_space(ch) && ch != ','; });
auto maybe_number = token.to_int();
if (!maybe_number.has_value())
return {};
switch (state) {
case State::MinX:
view_box.min_x = maybe_number.value();
break;
case State::MinY:
view_box.min_y = maybe_number.value();
break;
case State::Width:
view_box.width = maybe_number.value();
break;
case State::Height:
view_box.height = maybe_number.value();
break;
default:
return {};
}
state += 1;
}
return view_box;
}
}
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