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#include "cru/ui/render/border_render_object.hpp"
#include "cru/platform/debug.hpp"
#include "cru/platform/graph/geometry.hpp"
#include "cru/platform/graph/graph_factory.hpp"
#include "cru/platform/graph/painter_util.hpp"
#include <algorithm>
#include <cassert>
namespace cru::ui::render {
BorderRenderObject::BorderRenderObject(
std::shared_ptr<platform::graph::Brush> brush) {
assert(brush);
this->border_brush_ = std::move(brush);
RecreateGeometry();
}
void BorderRenderObject::Draw(platform::graph::Painter* painter) {
painter->FillGeometry(geometry_.get(), border_brush_.get());
if (const auto child = GetChild()) {
auto offset = child->GetOffset();
platform::graph::util::WithTransform(
painter, platform::Matrix::Translation(offset.x, offset.y),
[child](auto p) { child->Draw(p); });
}
}
RenderObject* BorderRenderObject::HitTest(const Point& point) {
if (const auto child = GetChild()) {
auto offset = child->GetOffset();
Point p{point.x - offset.x, point.y - offset.y};
const auto result = child->HitTest(point);
if (result != nullptr) {
return result;
}
}
if (is_enabled_) {
const auto contains =
border_outer_geometry_->FillContains(Point{point.x, point.y});
return contains ? this : nullptr;
} else {
const auto margin = GetMargin();
const auto size = GetSize();
return Rect{margin.left, margin.top,
std::max(size.width - margin.GetHorizontalTotal(), 0.0f),
std::max(size.height - margin.GetVerticalTotal(), 0.0f)}
.IsPointInside(point)
? this
: nullptr;
}
}
void BorderRenderObject::OnAddChild(RenderObject* new_child, int position) {
assert(GetChildren().size() == 1);
}
void BorderRenderObject::OnSizeChanged(const Size& old_size,
const Size& new_size) {
RecreateGeometry();
}
void BorderRenderObject::OnMeasureCore(const Size& available_size) {
const auto margin = GetMargin();
const auto padding = GetPadding();
Size margin_border_padding_size{
margin.GetHorizontalTotal() + padding.GetHorizontalTotal(),
margin.GetVerticalTotal() + padding.GetVerticalTotal()};
if (is_enabled_) {
margin_border_padding_size.width += border_thickness_.GetHorizontalTotal();
margin_border_padding_size.height += border_thickness_.GetVerticalTotal();
}
auto coerced_margin_border_padding_size = margin_border_padding_size;
if (coerced_margin_border_padding_size.width > available_size.width) {
platform::DebugMessage(
L"Measure: horizontal length of padding, border and margin is bigger "
L"than available length.");
coerced_margin_border_padding_size.width = available_size.width;
}
if (coerced_margin_border_padding_size.height > available_size.height) {
platform::DebugMessage(
L"Measure: vertical length of padding, border and margin is bigger "
L"than available length.");
coerced_margin_border_padding_size.height = available_size.height;
}
const auto coerced_content_available_size =
available_size - coerced_margin_border_padding_size;
const auto actual_content_size =
OnMeasureContent(coerced_content_available_size);
SetPreferredSize(coerced_margin_border_padding_size + actual_content_size);
}
void BorderRenderObject::OnLayoutCore(const Rect& rect) {
const auto margin = GetMargin();
const auto padding = GetPadding();
Size margin_border_padding_size{
margin.GetHorizontalTotal() + padding.GetHorizontalTotal(),
margin.GetVerticalTotal() + padding.GetVerticalTotal()};
if (is_enabled_) {
margin_border_padding_size.width += border_thickness_.GetHorizontalTotal();
margin_border_padding_size.height += border_thickness_.GetVerticalTotal();
}
const auto content_available_size =
rect.GetSize() - margin_border_padding_size;
auto coerced_content_available_size = content_available_size;
if (coerced_content_available_size.width < 0) {
platform::DebugMessage(
L"Layout: horizontal length of padding, border and margin is bigger "
L"than available length.");
coerced_content_available_size.width = 0;
}
if (coerced_content_available_size.height < 0) {
platform::DebugMessage(
L"Layout: vertical length of padding, border and margin is bigger "
L"than "
L"available length.");
coerced_content_available_size.height = 0;
}
OnLayoutContent(Rect{
margin.left + (is_enabled_ ? border_thickness_.left : 0) + padding.left,
margin.top + (is_enabled_ ? border_thickness_.top : 0) + padding.top,
coerced_content_available_size.width,
coerced_content_available_size.height});
}
Size BorderRenderObject::OnMeasureContent(const Size& available_size) {
const auto child = GetChild();
if (child) {
child->Measure(available_size);
return child->GetPreferredSize();
} else {
return Size{};
}
}
void BorderRenderObject::OnLayoutContent(const Rect& content_rect) {
const auto child = GetChild();
if (child) {
child->Layout(content_rect);
}
}
void BorderRenderObject::RecreateGeometry() {
geometry_.reset();
border_outer_geometry_.reset();
auto f = [](platform::graph::GeometryBuilder* builder, const Rect& rect,
const CornerRadius& corner) {
builder->BeginFigure(Point(rect.left + corner.left_top.x, rect.top));
builder->LineTo(Point(rect.GetRight() - corner.right_top.x, rect.top));
builder->QuadraticBezierTo(
Point(rect.GetRight(), rect.top),
Point(rect.GetRight(), rect.top + corner.right_top.y));
builder->LineTo(
Point(rect.GetRight(), rect.GetBottom() - corner.right_bottom.y));
builder->QuadraticBezierTo(
Point(rect.GetRight(), rect.GetBottom()),
Point(rect.GetRight() - corner.right_bottom.x, rect.GetBottom()));
builder->LineTo(Point(rect.left + corner.left_bottom.x, rect.GetBottom()));
builder->QuadraticBezierTo(
Point(rect.left, rect.GetBottom()),
Point(rect.left, rect.GetBottom() - corner.left_bottom.y));
builder->LineTo(Point(rect.left, rect.top + corner.left_top.y));
builder->QuadraticBezierTo(Point(rect.left, rect.top),
Point(rect.left + corner.left_top.x, rect.top));
builder->CloseFigure(true);
};
const auto size = GetSize();
const auto margin = GetMargin();
const Rect outer_rect{margin.left, margin.top,
size.width - margin.GetHorizontalTotal(),
size.height - margin.GetVerticalTotal()};
const auto graph_factory = platform::graph::GraphFactory::GetInstance();
std::unique_ptr<platform::graph::GeometryBuilder> builder{
graph_factory->CreateGeometryBuilder()};
f(builder.get(), outer_rect, corner_radius_);
border_outer_geometry_.reset(builder->Build());
builder.reset();
const Rect inner_rect = outer_rect.Shrink(border_thickness_);
builder.reset(graph_factory->CreateGeometryBuilder());
f(builder.get(), outer_rect, corner_radius_);
f(builder.get(), inner_rect, corner_radius_);
geometry_.reset(builder->Build());
builder.reset();
}
} // namespace cru::ui::render
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