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#include "cru/ui/render/RenderObject.h"
#include "cru/base/Base.h"
#include "cru/platform/GraphicsBase.h"
#include "cru/ui/controls/Control.h"
#include "cru/ui/controls/ControlHost.h"
namespace cru::ui::render {
const BoxConstraint BoxConstraint::kNotLimit{Size::kMax, Size::kZero};
RenderObject::RenderObject(std::string name)
: name_(std::move(name)),
control_(nullptr),
parent_(nullptr),
layout_valid_(false) {}
RenderObject::~RenderObject() { DestroyEvent_.Raise(this); }
void RenderObject::SetParent(RenderObject* new_parent) {
#ifdef CRU_DEBUG
// In case there is a cycle.
auto parent = new_parent;
while (parent) {
assert(parent != this);
parent = parent->GetParent();
}
#endif
parent_ = new_parent;
}
void RenderObject::SetAttachedControl(controls::Control* new_control) {
auto old_control = control_;
control_ = new_control;
OnAttachedControlChanged(old_control, new_control);
}
Point RenderObject::GetTotalOffset() {
Point result{};
RenderObject* render_object = this;
while (render_object != nullptr) {
const auto o = render_object->GetOffset();
result.x += o.x;
result.y += o.y;
render_object = render_object->GetParent();
}
return result;
}
Point RenderObject::FromRootToContent(const Point& point) {
const auto offset = GetTotalOffset();
const auto rect = GetContentRect();
return Point{point.x - (offset.x + rect.left),
point.y - (offset.y + rect.top)};
}
void RenderObject::SetMargin(const Thickness& margin) {
margin_ = margin;
InvalidateLayout();
}
void RenderObject::SetPadding(const Thickness& padding) {
padding_ = padding;
InvalidateLayout();
}
void RenderObject::SetSuggestSize(const MeasureSize& suggest_size) {
custom_measure_requirement_.suggest = suggest_size;
InvalidateLayout();
}
void RenderObject::SetMinSize(const MeasureSize& min_size) {
custom_measure_requirement_.min = min_size;
InvalidateLayout();
}
void RenderObject::SetMaxSize(const MeasureSize& max_size) {
custom_measure_requirement_.max = max_size;
InvalidateLayout();
}
void RenderObject::Measure(const MeasureRequirement& requirement) {
if (layout_valid_ && requirement == last_measure_requirement_) {
return;
}
measure_result_size_ = OnMeasureCore(requirement);
if (measure_result_size_.width < 0 || measure_result_size_.height < 0) {
throw Exception("Measure result size is invalid.");
}
last_measure_requirement_ = requirement;
}
void RenderObject::Layout(const Point& offset) {
Layout({offset, GetMeasureResultSize()});
}
void RenderObject::Layout(const Rect& rect) {
offset_ = rect.GetLeftTop();
auto new_size = rect.GetSize();
if (size_ != new_size) {
size_ = new_size;
OnResize(new_size);
}
OnLayoutCore(rect);
layout_valid_ = true;
}
Thickness RenderObject::GetTotalSpaceThickness() { return margin_ + padding_; }
Thickness RenderObject::GetInnerSpaceThickness() { return padding_; }
Size RenderObject::OnMeasureCore(const MeasureRequirement& requirement) {
auto space_size = GetTotalSpaceThickness().GetTotalSize();
auto content_requirement =
requirement.Merge(custom_measure_requirement_).Minus(space_size);
auto content_size = OnMeasureContent(content_requirement);
return space_size + content_size;
}
void RenderObject::OnLayoutCore(const Rect& rect) {
auto total_size = rect.GetSize();
auto outer_space = GetTotalSpaceThickness();
auto content_size = (total_size - outer_space.GetTotalSize()).AtLeast0();
Point lefttop{outer_space.left, outer_space.top};
lefttop.x = std::min(lefttop.x, total_size.width);
lefttop.y = std::min(lefttop.y, total_size.height);
const Rect content_rect{lefttop, content_size};
OnLayoutContent(content_rect);
}
Rect RenderObject::GetPaddingRect() {
const auto size = GetMeasureResultSize();
Rect rect{Point{}, size};
rect = rect.Shrink(GetMargin());
rect.left = std::min(rect.left, size.width);
rect.top = std::min(rect.top, size.height);
rect.width = std::max(rect.width, 0.0f);
rect.height = std::max(rect.height, 0.0f);
return rect;
}
Rect RenderObject::GetContentRect() {
const auto size = GetMeasureResultSize();
Rect rect{Point{}, size};
rect = rect.Shrink(GetMargin());
rect = rect.Shrink(GetPadding());
rect.left = std::min(rect.left, size.width);
rect.top = std::min(rect.top, size.height);
rect.width = std::max(rect.width, 0.0f);
rect.height = std::max(rect.height, 0.0f);
return rect;
}
controls::ControlHost* RenderObject::GetControlHost() {
if (control_) {
return control_->GetControlHost();
}
return nullptr;
}
void RenderObject::InvalidateLayout() {
WalkUp([](RenderObject* ro) { ro->layout_valid_ = false; });
if (auto host = GetControlHost()) {
host->ScheduleRelayout();
}
}
void RenderObject::InvalidatePaint() {
if (auto window = GetControlHost()) {
window->ScheduleRepaint();
}
}
std::string RenderObject::GetName() { return name_; }
std::string RenderObject::GetDebugPathInTree() {
std::vector<std::string> chain;
RenderObject* parent = this;
while (parent != nullptr) {
chain.push_back(parent->GetName());
parent = parent->GetParent();
}
std::string result(chain.back());
for (auto iter = chain.crbegin() + 1; iter != chain.crend(); ++iter) {
result += " -> ";
result += *iter;
}
return result;
}
} // namespace cru::ui::render
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