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#ifndef IMAGE_IO_BASE_DATA_LINE_MAP_BUILDER_DESTINATION_H_ // NOLINT
#define IMAGE_IO_BASE_DATA_LINE_MAP_BUILDER_DESTINATION_H_ // NOLINT
#include "image_io/base/data_destination.h"
#include "image_io/base/data_line_map.h"
namespace photos_editing_formats {
namespace image_io {
/// A class to build a data line map of the string implied by the transfer
/// range of a data segment before passing the transfer off to an optional
/// next data destination.
class DataLineMapBuilderDestination : public DataDestination {
public:
/// @param data_line_map The data line map to build.
/// @param next_destination An optional next transfer data destination
DataLineMapBuilderDestination(DataLineMap* data_line_map,
DataDestination* next_destination)
: data_line_map_(data_line_map),
next_destination_(next_destination),
bytes_transferred_(0) {}
void StartTransfer() override {
if (next_destination_ != nullptr) {
next_destination_->StartTransfer();
}
}
void FinishTransfer() override {
if (next_destination_ != nullptr) {
next_destination_->FinishTransfer();
}
}
TransferStatus Transfer(const DataRange& transfer_range,
const DataSegment& data_segment) override {
bytes_transferred_ += transfer_range.GetLength();
data_line_map_->FindDataLines(transfer_range, data_segment);
return next_destination_ != nullptr
? next_destination_->Transfer(transfer_range, data_segment)
: kTransferOk;
}
size_t GetBytesTransferred() const override { return bytes_transferred_; }
private:
DataLineMap* data_line_map_;
DataDestination* next_destination_;
size_t bytes_transferred_;
};
} // namespace image_io
} // namespace photos_editing_formats
#endif // IMAGE_IO_BASE_DATA_LINE_MAP_BUILDER_DESTINATION_H_ // NOLINT
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