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#include "cru/ui/render/TextRenderObject.hpp"
#include "../Helper.hpp"
#include "cru/common/Logger.hpp"
#include "cru/platform/graph/Factory.hpp"
#include "cru/platform/graph/TextLayout.hpp"
#include "cru/platform/graph/util/Painter.hpp"
#include <algorithm>
#include <limits>
namespace cru::ui::render {
TextRenderObject::TextRenderObject(
std::shared_ptr<platform::graph::IBrush> brush,
std::shared_ptr<platform::graph::IFont> font,
std::shared_ptr<platform::graph::IBrush> selection_brush,
std::shared_ptr<platform::graph::IBrush> caret_brush) {
Expects(brush);
Expects(font);
Expects(selection_brush);
Expects(caret_brush);
SetChildMode(ChildMode::None);
brush.swap(brush_);
font.swap(font_);
selection_brush.swap(selection_brush_);
caret_brush.swap(caret_brush_);
const auto graph_factory = GetGraphFactory();
text_layout_ = graph_factory->CreateTextLayout(font_, "");
}
TextRenderObject::~TextRenderObject() = default;
std::string TextRenderObject::GetText() const {
return text_layout_->GetText();
}
void TextRenderObject::SetText(std::string new_text) {
text_layout_->SetText(std::move(new_text));
}
void TextRenderObject::SetBrush(
std::shared_ptr<platform::graph::IBrush> new_brush) {
Expects(new_brush);
new_brush.swap(brush_);
InvalidatePaint();
}
std::shared_ptr<platform::graph::IFont> TextRenderObject::GetFont() const {
return text_layout_->GetFont();
}
void TextRenderObject::SetFont(std::shared_ptr<platform::graph::IFont> font) {
Expects(font);
text_layout_->SetFont(std::move(font));
}
std::vector<Rect> TextRenderObject::TextRangeRect(const TextRange& text_range) {
return text_layout_->TextRangeRect(text_range);
}
Point TextRenderObject::TextSinglePoint(gsl::index position, bool trailing) {
return text_layout_->TextSinglePoint(position, trailing);
}
platform::graph::TextHitTestResult TextRenderObject::TextHitTest(
const Point& point) {
return text_layout_->HitTest(point);
}
void TextRenderObject::SetSelectionRange(std::optional<TextRange> new_range) {
selection_range_ = std::move(new_range);
InvalidatePaint();
}
void TextRenderObject::SetSelectionBrush(
std::shared_ptr<platform::graph::IBrush> new_brush) {
Expects(new_brush);
new_brush.swap(selection_brush_);
if (selection_range_ && selection_range_->count) {
InvalidatePaint();
}
}
void TextRenderObject::SetDrawCaret(bool draw_caret) {
if (draw_caret_ != draw_caret) {
draw_caret_ = draw_caret;
InvalidatePaint();
}
}
void TextRenderObject::SetCaretPosition(gsl::index position) {
if (position != caret_position_) {
caret_position_ = position;
if (draw_caret_) {
InvalidatePaint();
}
}
}
void TextRenderObject::GetCaretBrush(
std::shared_ptr<platform::graph::IBrush> brush) {
Expects(brush);
brush.swap(caret_brush_);
if (draw_caret_) {
InvalidatePaint();
}
}
void TextRenderObject::SetCaretWidth(const float width) {
Expects(width >= 0.0f);
caret_width_ = width;
if (draw_caret_) {
InvalidatePaint();
}
}
void TextRenderObject::Draw(platform::graph::IPainter* painter) {
platform::graph::util::WithTransform(
painter,
platform::Matrix::Translation(GetMargin().left + GetPadding().left,
GetMargin().top + GetPadding().top),
[this](platform::graph::IPainter* p) {
if (this->selection_range_.has_value()) {
const auto&& rects =
text_layout_->TextRangeRect(this->selection_range_.value());
for (const auto& rect : rects)
p->FillRectangle(rect, this->GetSelectionBrush().get());
}
p->DrawText(Point{}, text_layout_.get(), brush_.get());
if (this->draw_caret_ && this->caret_width_ != 0.0f) {
auto caret_pos = this->caret_position_;
gsl::index text_size = this->GetText().size();
if (caret_pos < 0) {
caret_pos = 0;
} else if (caret_pos > text_size) {
caret_pos = text_size;
}
const auto caret_top_center =
this->text_layout_->TextSinglePoint(caret_pos, false);
const auto font_height = this->font_->GetFontSize();
const auto caret_width = this->caret_width_;
p->FillRectangle(Rect{caret_top_center.x - caret_width / 2.0f,
caret_top_center.y, caret_width, font_height},
this->caret_brush_.get());
}
});
}
RenderObject* TextRenderObject::HitTest(const Point& point) {
const auto padding_rect = GetPaddingRect();
return padding_rect.IsPointInside(point) ? this : nullptr;
}
Size TextRenderObject::OnMeasureContent(const MeasureRequirement& requirement,
const MeasureSize& preferred_size) {
float measure_width;
if (preferred_size.width.IsSpecified())
measure_width = preferred_size.width.GetLengthOrUndefined();
else
measure_width = preferred_size.width.GetLengthOrMax();
text_layout_->SetMaxWidth(measure_width);
text_layout_->SetMaxHeight(std::numeric_limits<float>::max());
const auto text_size = text_layout_->GetTextBounds().GetSize();
auto result = text_size;
if (requirement.max.width.IsSpecified() &&
text_size.width > requirement.max.width.GetLengthOrUndefined()) {
log::Warn(
"TextRenderObject: Text actual width exceeds the required max width.");
result.width = requirement.max.width.GetLengthOrUndefined();
} else {
result.width = std::max(result.width, preferred_size.width.GetLengthOr0());
result.width = std::max(result.width, requirement.min.width.GetLengthOr0());
}
if (requirement.max.height.IsSpecified() &&
text_size.height > requirement.max.height.GetLengthOrUndefined()) {
log::Warn(
"TextRenderObject: Text actual height exceeds the required max "
"height.");
result.width = requirement.max.width.GetLengthOrUndefined();
} else {
result.height =
std::max(result.height, preferred_size.height.GetLengthOr0());
result.width =
std::max(result.height, requirement.min.height.GetLengthOr0());
}
return result;
}
void TextRenderObject::OnLayoutContent(const Rect& content_rect) {
CRU_UNUSED(content_rect)
}
void TextRenderObject::OnAfterLayout() {
const auto&& size = GetContentRect().GetSize();
text_layout_->SetMaxWidth(size.width);
text_layout_->SetMaxHeight(size.height);
}
} // namespace cru::ui::render
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