0c14103025
This solves an awkward dependency cycle, where CalculatedStyleValue needs the definition of Percentage, but including that would also pull in PercentageOr, which in turn needs CalculatedStyleValue. Many places that previously included StyleValue.h no longer need to. :^)
107 lines
3.9 KiB
C++
107 lines
3.9 KiB
C++
/*
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* Copyright (c) 2022-2023, MacDue <macdue@dueutil.tech>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include "Position.h"
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#include <LibGfx/Point.h>
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#include <LibGfx/Rect.h>
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namespace Web::CSS {
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CSSPixelPoint PositionValue::resolved(Layout::Node const& node, CSSPixelRect const& rect) const
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{
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// Note: A preset + a none default x/y_relative_to is impossible in the syntax (and makes little sense)
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CSSPixels x = horizontal_position.visit(
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[&](HorizontalPreset preset) -> CSSPixels {
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return rect.width() * [&] {
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switch (preset) {
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case HorizontalPreset::Left:
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return 0.0f;
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case HorizontalPreset::Center:
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return 0.5f;
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case HorizontalPreset::Right:
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return 1.0f;
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default:
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VERIFY_NOT_REACHED();
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}
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}();
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},
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[&](LengthPercentage length_percentage) -> CSSPixels {
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return length_percentage.resolved(node, Length::make_px(rect.width())).to_px(node);
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});
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CSSPixels y = vertical_position.visit(
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[&](VerticalPreset preset) -> CSSPixels {
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return rect.height() * [&] {
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switch (preset) {
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case VerticalPreset::Top:
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return 0.0f;
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case VerticalPreset::Center:
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return 0.5f;
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case VerticalPreset::Bottom:
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return 1.0f;
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default:
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VERIFY_NOT_REACHED();
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}
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}();
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},
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[&](LengthPercentage length_percentage) -> CSSPixels {
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return length_percentage.resolved(node, Length::make_px(rect.height())).to_px(node);
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});
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if (x_relative_to == HorizontalEdge::Right)
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x = rect.width() - x;
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if (y_relative_to == VerticalEdge::Bottom)
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y = rect.height() - y;
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return CSSPixelPoint { rect.x() + x, rect.y() + y };
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}
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ErrorOr<void> PositionValue::serialize(StringBuilder& builder) const
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{
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// Note: This means our serialization with simplify any with explicit edges that are just `top left`.
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bool has_relative_edges = x_relative_to == HorizontalEdge::Right || y_relative_to == VerticalEdge::Bottom;
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if (has_relative_edges)
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TRY(builder.try_append(x_relative_to == HorizontalEdge::Left ? "left "sv : "right "sv));
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TRY(horizontal_position.visit(
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[&](HorizontalPreset preset) -> ErrorOr<void> {
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return builder.try_append([&] {
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switch (preset) {
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case HorizontalPreset::Left:
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return "left"sv;
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case HorizontalPreset::Center:
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return "center"sv;
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case HorizontalPreset::Right:
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return "right"sv;
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default:
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VERIFY_NOT_REACHED();
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}
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}());
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},
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[&](LengthPercentage length_percentage) -> ErrorOr<void> {
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return builder.try_appendff(TRY(length_percentage.to_string()));
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}));
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TRY(builder.try_append(' '));
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if (has_relative_edges)
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TRY(builder.try_append(y_relative_to == VerticalEdge::Top ? "top "sv : "bottom "sv));
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TRY(vertical_position.visit(
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[&](VerticalPreset preset) -> ErrorOr<void> {
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return builder.try_append([&] {
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switch (preset) {
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case VerticalPreset::Top:
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return "top"sv;
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case VerticalPreset::Center:
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return "center"sv;
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case VerticalPreset::Bottom:
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return "bottom"sv;
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default:
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VERIFY_NOT_REACHED();
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}
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}());
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},
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[&](LengthPercentage length_percentage) -> ErrorOr<void> {
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return builder.try_append(TRY(length_percentage.to_string()));
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}));
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return {};
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}
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}
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