f57c42fad7
We can just use division here, since fixed-point division by 2 will compile down to a shift by 1.
102 lines
3.5 KiB
C++
102 lines
3.5 KiB
C++
/*
|
|
* Copyright (c) 2022-2023, MacDue <macdue@dueutil.tech>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include "Position.h"
|
|
#include <LibGfx/Point.h>
|
|
#include <LibGfx/Rect.h>
|
|
|
|
namespace Web::CSS {
|
|
|
|
CSSPixelPoint PositionValue::resolved(Layout::Node const& node, CSSPixelRect const& rect) const
|
|
{
|
|
// Note: A preset + a none default x/y_relative_to is impossible in the syntax (and makes little sense)
|
|
CSSPixels x = horizontal_position.visit(
|
|
[&](HorizontalPreset preset) -> CSSPixels {
|
|
switch (preset) {
|
|
case HorizontalPreset::Left:
|
|
return 0;
|
|
case HorizontalPreset::Center:
|
|
return rect.width() / 2;
|
|
case HorizontalPreset::Right:
|
|
return rect.width();
|
|
default:
|
|
VERIFY_NOT_REACHED();
|
|
}
|
|
},
|
|
[&](LengthPercentage length_percentage) -> CSSPixels {
|
|
return length_percentage.to_px(node, rect.width());
|
|
});
|
|
CSSPixels y = vertical_position.visit(
|
|
[&](VerticalPreset preset) -> CSSPixels {
|
|
switch (preset) {
|
|
case VerticalPreset::Top:
|
|
return 0;
|
|
case VerticalPreset::Center:
|
|
return rect.height() / 2;
|
|
case VerticalPreset::Bottom:
|
|
return rect.height();
|
|
default:
|
|
VERIFY_NOT_REACHED();
|
|
}
|
|
},
|
|
[&](LengthPercentage length_percentage) -> CSSPixels {
|
|
return length_percentage.to_px(node, rect.height());
|
|
});
|
|
if (x_relative_to == HorizontalEdge::Right)
|
|
x = rect.width() - x;
|
|
if (y_relative_to == VerticalEdge::Bottom)
|
|
y = rect.height() - y;
|
|
return CSSPixelPoint { rect.x() + x, rect.y() + y };
|
|
}
|
|
|
|
void PositionValue::serialize(StringBuilder& builder) const
|
|
{
|
|
// Note: This means our serialization with simplify any with explicit edges that are just `top left`.
|
|
bool has_relative_edges = x_relative_to == HorizontalEdge::Right || y_relative_to == VerticalEdge::Bottom;
|
|
if (has_relative_edges)
|
|
builder.append(x_relative_to == HorizontalEdge::Left ? "left "sv : "right "sv);
|
|
horizontal_position.visit(
|
|
[&](HorizontalPreset preset) {
|
|
builder.append([&] {
|
|
switch (preset) {
|
|
case HorizontalPreset::Left:
|
|
return "left"sv;
|
|
case HorizontalPreset::Center:
|
|
return "center"sv;
|
|
case HorizontalPreset::Right:
|
|
return "right"sv;
|
|
default:
|
|
VERIFY_NOT_REACHED();
|
|
}
|
|
}());
|
|
},
|
|
[&](LengthPercentage length_percentage) {
|
|
builder.append(length_percentage.to_string());
|
|
});
|
|
builder.append(' ');
|
|
if (has_relative_edges)
|
|
builder.append(y_relative_to == VerticalEdge::Top ? "top "sv : "bottom "sv);
|
|
vertical_position.visit(
|
|
[&](VerticalPreset preset) {
|
|
builder.append([&] {
|
|
switch (preset) {
|
|
case VerticalPreset::Top:
|
|
return "top"sv;
|
|
case VerticalPreset::Center:
|
|
return "center"sv;
|
|
case VerticalPreset::Bottom:
|
|
return "bottom"sv;
|
|
default:
|
|
VERIFY_NOT_REACHED();
|
|
}
|
|
}());
|
|
},
|
|
[&](LengthPercentage length_percentage) {
|
|
builder.append(length_percentage.to_string());
|
|
});
|
|
}
|
|
|
|
}
|