mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-09-21 10:19:03 +03:00
68 lines
1.3 KiB
C++
68 lines
1.3 KiB
C++
/*
|
|
* Copyright (c) 2022, Sam Atkins <atkinssj@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include "Resolution.h"
|
|
#include <LibWeb/CSS/StyleValue.h>
|
|
|
|
namespace Web::CSS {
|
|
|
|
Resolution::Resolution(int value, Type type)
|
|
: m_type(type)
|
|
, m_value(value)
|
|
{
|
|
}
|
|
|
|
Resolution::Resolution(float value, Type type)
|
|
: m_type(type)
|
|
, m_value(value)
|
|
{
|
|
}
|
|
|
|
ErrorOr<String> Resolution::to_string() const
|
|
{
|
|
return String::formatted("{}{}", m_value, unit_name());
|
|
}
|
|
|
|
float Resolution::to_dots_per_pixel() const
|
|
{
|
|
switch (m_type) {
|
|
case Type::Dpi:
|
|
return m_value * 96; // 1in = 2.54cm = 96px
|
|
case Type::Dpcm:
|
|
return m_value * (96.0f / 2.54f); // 1cm = 96px/2.54
|
|
case Type::Dppx:
|
|
return m_value;
|
|
}
|
|
VERIFY_NOT_REACHED();
|
|
}
|
|
|
|
StringView Resolution::unit_name() const
|
|
{
|
|
switch (m_type) {
|
|
case Type::Dpi:
|
|
return "dpi"sv;
|
|
case Type::Dpcm:
|
|
return "dpcm"sv;
|
|
case Type::Dppx:
|
|
return "dppx"sv;
|
|
}
|
|
VERIFY_NOT_REACHED();
|
|
}
|
|
|
|
Optional<Resolution::Type> Resolution::unit_from_name(StringView name)
|
|
{
|
|
if (name.equals_ignoring_ascii_case("dpi"sv)) {
|
|
return Type::Dpi;
|
|
} else if (name.equals_ignoring_ascii_case("dpcm"sv)) {
|
|
return Type::Dpcm;
|
|
} else if (name.equals_ignoring_ascii_case("dppx"sv)) {
|
|
return Type::Dppx;
|
|
}
|
|
return {};
|
|
}
|
|
|
|
}
|