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#include "cru/win/graph/direct/text_layout.hpp"
#include "cru/win/graph/direct/exception.hpp"
#include <cassert>
#include <utility>
namespace cru::platform::graph::win::direct {
DWriteTextLayout::DWriteTextLayout(IDirectFactory* factory,
std::shared_ptr<Font> font,
std::wstring text)
: text_(std::move(text)) {
assert(factory);
assert(font);
assert(IsDirectResource(font.get()));
factory_ = factory;
font_ = std::static_pointer_cast<DWriteFont>(font);
ThrowIfFailed(factory->GetDWriteFactory()->CreateTextLayout(
text_.c_str(), static_cast<UINT32>(text_.size()),
font_->GetComInterface(), max_width_, max_height_, &text_layout_));
}
std::wstring DWriteTextLayout::GetText() { return text_; }
void DWriteTextLayout::SetText(std::wstring new_text) {
text_.swap(new_text);
ThrowIfFailed(factory_->GetDWriteFactory()->CreateTextLayout(
text_.c_str(), static_cast<UINT32>(text_.size()),
font_->GetComInterface(), max_width_, max_height_, &text_layout_));
}
std::shared_ptr<Font> DWriteTextLayout::GetFont() {
return std::static_pointer_cast<Font>(font_);
}
void DWriteTextLayout::SetFont(std::shared_ptr<Font> font) {
assert(IsDirectResource(font.get()));
auto f = std::static_pointer_cast<DWriteFont>(font);
f.swap(font_);
ThrowIfFailed(factory_->GetDWriteFactory()->CreateTextLayout(
text_.c_str(), static_cast<UINT32>(text_.size()),
font_->GetComInterface(), max_width_, max_height_, &text_layout_));
}
void DWriteTextLayout::SetMaxWidth(float max_width) {
max_width_ = max_width;
ThrowIfFailed(text_layout_->SetMaxWidth(max_width_));
}
void DWriteTextLayout::SetMaxHeight(float max_height) {
max_height_ = max_height;
ThrowIfFailed(text_layout_->SetMaxHeight(max_height_));
}
Rect DWriteTextLayout::GetTextBounds() {
DWRITE_TEXT_METRICS metrics;
ThrowIfFailed(text_layout_->GetMetrics(&metrics));
return Rect{metrics.left, metrics.top, metrics.width, metrics.height};
}
std::vector<Rect> DWriteTextLayout::TextRangeRect(const TextRange& text_range) {
DWRITE_TEXT_METRICS text_metrics;
ThrowIfFailed(text_layout_->GetMetrics(&text_metrics));
const auto metrics_count =
text_metrics.lineCount * text_metrics.maxBidiReorderingDepth;
std::vector<DWRITE_HIT_TEST_METRICS> hit_test_metrics(metrics_count);
UINT32 actual_count;
text_layout_->HitTestTextRange(text_range.position, text_range.count, 0, 0,
hit_test_metrics.data(), metrics_count,
&actual_count);
hit_test_metrics.erase(hit_test_metrics.cbegin() + actual_count,
hit_test_metrics.cend());
std::vector<Rect> result;
result.reserve(actual_count);
for (const auto& metrics : hit_test_metrics) {
result.push_back(Rect{metrics.left, metrics.top,
metrics.left + metrics.width,
metrics.top + metrics.height});
}
return result;
}
} // namespace cru::platform::graph::win::direct
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