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#include "cru/ui/render/RenderObject.h"
#include "cru/common/log/Logger.h"
#include "cru/ui/DebugFlags.h"
#include "cru/ui/controls/Control.h"
#include "cru/ui/host/WindowHost.h"
namespace cru::ui::render {
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() const {
Point result{};
const 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 {
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::SetPreferredSize(const MeasureSize& preferred_size) {
preferred_size_ = preferred_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,
const MeasureSize& preferred_size) {
MeasureRequirement merged_requirement =
MeasureRequirement::Merge(requirement, custom_measure_requirement_)
.Normalize();
MeasureSize merged_preferred_size =
preferred_size.OverrideBy(preferred_size_);
if constexpr (cru::ui::debug_flags::layout) {
CRU_LOG_DEBUG(u"{} Measure begins :\nrequirement: {}\npreferred size: {}",
this->GetDebugPathInTree(), requirement.ToDebugString(),
preferred_size.ToDebugString());
}
desired_size_ = OnMeasureCore(merged_requirement, merged_preferred_size);
if constexpr (cru::ui::debug_flags::layout) {
CRU_LOG_DEBUG(u"{} Measure ends :\nresult size: {}",
this->GetDebugPathInTree(), desired_size_);
}
Ensures(desired_size_.width >= 0);
Ensures(desired_size_.height >= 0);
}
void RenderObject::Layout(const Point& offset) {
if constexpr (cru::ui::debug_flags::layout) {
CRU_LOG_DEBUG(u"{} Layout :\noffset: {} size: {}",
this->GetDebugPathInTree(), offset, desired_size_);
}
offset_ = offset;
size_ = desired_size_;
OnResize(size_);
OnLayoutCore();
}
Thickness RenderObject::GetOuterSpaceThickness() const {
return margin_ + padding_;
}
Size RenderObject::OnMeasureCore(const MeasureRequirement& requirement,
const MeasureSize& preferred_size) {
const Thickness outer_space = GetOuterSpaceThickness();
const Size space_size{outer_space.GetHorizontalTotal(),
outer_space.GetVerticalTotal()};
MeasureRequirement content_requirement = requirement;
content_requirement.max = content_requirement.max.Minus(space_size);
content_requirement.min = content_requirement.min.Minus(space_size);
MeasureSize content_preferred_size =
content_requirement.Coerce(preferred_size.Minus(space_size));
const auto content_size =
OnMeasureContent(content_requirement, content_preferred_size);
return space_size + content_size;
}
void RenderObject::OnLayoutCore() {
Size total_size = GetDesiredSize();
const Thickness outer_space = GetOuterSpaceThickness();
const Size space_size{outer_space.GetHorizontalTotal(),
outer_space.GetVerticalTotal()};
auto content_size = total_size - space_size;
if (content_size.width < 0) {
content_size.width = 0;
}
if (content_size.height < 0) {
content_size.height = 0;
}
Point lefttop{outer_space.left, outer_space.top};
if (lefttop.x > total_size.width) {
lefttop.x = total_size.width;
}
if (lefttop.y > total_size.height) {
lefttop.y = total_size.height;
}
const Rect content_rect{lefttop, content_size};
OnLayoutContent(content_rect);
}
Rect RenderObject::GetPaddingRect() const {
const auto size = GetDesiredSize();
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 {
const auto size = GetDesiredSize();
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;
}
host::WindowHost* RenderObject::GetWindowHost() {
if (control_) {
return control_->GetWindowHost();
}
return nullptr;
}
void RenderObject::InvalidateLayout() {
if (auto window_host = GetWindowHost()) {
window_host->InvalidateLayout();
}
}
void RenderObject::InvalidatePaint() {
if (auto window_host = GetWindowHost()) {
window_host->InvalidatePaint();
}
}
String kUnamedName(u"UNNAMED");
String RenderObject::GetName() const { return kUnamedName; }
String RenderObject::GetDebugPathInTree() const {
std::vector<String> chain;
const RenderObject* parent = this;
while (parent != nullptr) {
chain.push_back(parent->GetName());
parent = parent->GetParent();
}
String result(chain.back());
for (auto iter = chain.crbegin() + 1; iter != chain.crend(); ++iter) {
result += u" -> ";
result += *iter;
}
return result;
}
} // namespace cru::ui::render
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