third_party/WebKit/Source/core/css/CSSGridTemplateAreasValue.cpp

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#include "core/css/CSSGridTemplateAreasValue.h"

#include "platform/wtf/text/StringBuilder.h"

namespace blink {

CSSGridTemplateAreasValue::CSSGridTemplateAreasValue(
    const NamedGridAreaMap& grid_area_map,
    size_t row_count,
    size_t column_count)
    : CSSValue(kGridTemplateAreasClass),
      grid_area_map_(grid_area_map),
      row_count_(row_count),
      column_count_(column_count) {
  DCHECK(row_count_);
  DCHECK(column_count_);
}

static String StringForPosition(const NamedGridAreaMap& grid_area_map,
                                size_t row,
                                size_t column) {
  for (const auto& item : grid_area_map) {
    const GridArea& area = item.value;
    if (row >= area.rows.StartLine() && row < area.rows.EndLine() &&
        column >= area.columns.StartLine() && column < area.columns.EndLine())
      return item.key;
  }

  return ".";
}

String CSSGridTemplateAreasValue::CustomCSSText() const {
  StringBuilder builder;
  for (size_t row = 0; row < row_count_; ++row) {
    builder.Append('"');
    for (size_t column = 0; column < column_count_; ++column) {
      builder.Append(StringForPosition(grid_area_map_, row, column));
      if (column != column_count_ - 1)
        builder.Append(' ');
    }
    builder.Append('"');
    if (row != row_count_ - 1)
      builder.Append(' ');
  }
  return builder.ToString();
}

bool CSSGridTemplateAreasValue::Equals(
    const CSSGridTemplateAreasValue& other) const {
  return grid_area_map_ == other.grid_area_map_ &&
         row_count_ == other.row_count_ && column_count_ == other.column_count_;
}

}  // namespace blink