syntax = "proto3";

package render;

option go_package = "github.com/limpidchart/lc-proto/render/v0;render";

import "google/protobuf/wrappers.proto";

// ChartScale represents options to configure chart scale.
message ChartScale {
  // ChartScaleKind contains available scale kinds.
  enum ChartScaleKind {
    UNSPECIFIED_SCALE = 0;
    LINEAR = 1;
    BAND = 2;
  }

  // One of the available scale kinds.
  ChartScaleKind kind = 1;

  // Start of the scale range.
  google.protobuf.Int32Value range_start = 2;

  // End of the scale range.
  google.protobuf.Int32Value range_end = 3;

  // Scale domain with one of available kind.
  oneof domain {
    // Numeric scale domain.
    DomainNumeric domain_numeric = 4;

    // String scale domain categories.
    DomainCategories domain_categories = 5;
  }

  // Does this scale needs an offset from the start and end of an axis.
  // This is usually need for an area or line views.
  bool no_boundaries_offset = 7;

  // Inner padding for categories.
  google.protobuf.FloatValue inner_padding = 8;

  // Outer padding for categories.
  google.protobuf.FloatValue outer_padding = 9;
}

// DomainNumeric represents numeric scale domain.
message DomainNumeric {
  // Start of the numeric scale domain.
  float start = 1;

  // End of the numeric scale domain.
  float end = 2;
}

// DomainCategories represents string categorical scale domain.
message DomainCategories {
  repeated string categories = 1;
}