ladybird/Userland/Libraries/LibWeb/SVG/ViewBox.cpp
Shannon Booth e2e7c4d574 Everywhere: Use to_number<T> instead of to_{int,uint,float,double}
In a bunch of cases, this actually ends up simplifying the code as
to_number will handle something such as:

```
Optional<I> opt;
if constexpr (IsSigned<I>)
    opt = view.to_int<I>();
else
    opt = view.to_uint<I>();
```

For us.

The main goal here however is to have a single generic number conversion
API between all of the String classes.
2023-12-23 20:41:07 +01:00

59 lines
1.4 KiB
C++

/*
* 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_number<float>();
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;
}
}