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#include "cru/platform/graphics/cairo/PangoTextLayout.h"
#include "cru/common/StringUtil.h"
#include "cru/platform/Check.h"
#include "cru/platform/graphics/cairo/CairoGraphicsFactory.h"
#include "cru/platform/graphics/cairo/PangoFont.h"
namespace cru::platform::graphics::cairo {
PangoTextLayout::PangoTextLayout(CairoGraphicsFactory* factory,
std::shared_ptr<IFont> font)
: CairoResource(factory) {
Expects(font);
font_ = CheckPlatform<PangoFont>(font, GetPlatformId());
pango_layout_ = pango_layout_new(factory->GetDefaultPangoContext());
pango_layout_set_font_description(pango_layout_,
font_->GetPangoFontDescription());
};
PangoTextLayout::~PangoTextLayout() { g_object_unref(pango_layout_); }
String PangoTextLayout::GetText() { return text_; }
void PangoTextLayout::SetText(String new_text) {
text_ = std::move(new_text);
utf8_text_ = text_.ToUtf8();
pango_layout_set_text(pango_layout_, utf8_text_.c_str(), utf8_text_.size());
}
std::shared_ptr<IFont> PangoTextLayout::GetFont() { return font_; }
void PangoTextLayout::SetFont(std::shared_ptr<IFont> font) {
Expects(font);
font_ = CheckPlatform<PangoFont>(font, GetPlatformId());
pango_layout_set_font_description(pango_layout_,
font_->GetPangoFontDescription());
}
void PangoTextLayout::SetMaxWidth(float max_width) {
return pango_layout_set_width(pango_layout_, max_width);
}
void PangoTextLayout::SetMaxHeight(float max_height) {
return pango_layout_set_height(pango_layout_, max_height);
}
bool PangoTextLayout::IsEditMode() { return edit_mode_; }
void PangoTextLayout::SetEditMode(bool enable) { edit_mode_ = enable; }
Index PangoTextLayout::GetLineIndexFromCharIndex(Index char_index) {
int line;
pango_layout_index_to_line_x(pango_layout_,
FromUtf16IndexToUtf8Index(char_index), false,
&line, nullptr);
return line;
}
Index PangoTextLayout::GetLineCount() {
return pango_layout_get_line_count(pango_layout_);
}
float PangoTextLayout::GetLineHeight(Index line_index) {
auto line = pango_layout_get_line_readonly(pango_layout_, line_index);
int height;
pango_layout_line_get_height(line, &height);
return height;
}
Index PangoTextLayout::FromUtf8IndexToUtf16Index(Index index) {
Utf8CodePointIterator iter(utf8_text_.data(), utf8_text_.size());
int cp_count = 0;
while ((!iter.IsPastEnd()) && iter.GetPosition() < index) {
++iter;
cp_count++;
}
return text_.IndexFromCodePointToCodeUnit(cp_count);
}
Index PangoTextLayout::FromUtf16IndexToUtf8Index(Index index) {
Index cp_index = text_.IndexFromCodeUnitToCodePoint(index);
Utf8CodePointIterator iter(utf8_text_.data(), utf8_text_.size());
for (Index i = 0; i < cp_index; ++i) {
++iter;
}
return iter.GetPosition();
}
} // namespace cru::platform::graphics::cairo
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