[XY axis] Improve expression with explicit params

src/plugins/vis_type_xy/public/expression_functions/category_axis.ts

@@ -0,0 +1,116 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
+ */
+
+import { i18n } from '@kbn/i18n';
+import {
+  ExpressionFunctionDefinition,
+  Datatable,
+  ExpressionValueBoxed,
+} from '../../../expressions/public';
+import { CategoryAxis } from '../types';
+import { ExpressionValueScale } from './vis_scale';
+import { ExpressionValueLabel } from './label';
+
+export interface Arguments extends Omit<CategoryAxis, 'title' | 'scale' | 'labels'> {
+  titleText?: string;
+  scale: ExpressionValueScale;
+  labels: ExpressionValueLabel;
+}
+
+export type ExpressionValueCategoryAxis = ExpressionValueBoxed<
+  'category_axis',
+  {
+    id: CategoryAxis['id'];
+    show: CategoryAxis['show'];
+    position: CategoryAxis['position'];
+    axisType: CategoryAxis['type'];
+    title: {
+      text?: string;
+    };
+    labels: CategoryAxis['labels'];
+    scale: CategoryAxis['scale'];
+  }
+>;
+
+export const categoryAxis = (): ExpressionFunctionDefinition<
+  'categoryaxis',
+  Datatable | null,
+  Arguments,
+  ExpressionValueCategoryAxis
+> => ({
+  name: 'categoryaxis',
+  help: i18n.translate('visTypeXy.function.categoryAxis.help', {
+    defaultMessage: 'Generates category axis object',
+  }),
+  type: 'category_axis',
+  args: {
+    id: {
+      types: ['string'],
+      help: i18n.translate('visTypeXy.function.categoryAxis.id.help', {
+        defaultMessage: 'Id of category axis',
+      }),
+      required: true,
+    },
+    show: {
+      types: ['boolean'],
+      help: i18n.translate('visTypeXy.function.categoryAxis.show.help', {
+        defaultMessage: 'Show the category axis',
+      }),
+      required: true,
+    },
+    position: {
+      types: ['string'],
+      help: i18n.translate('visTypeXy.function.categoryAxis.position.help', {
+        defaultMessage: 'Position of the category axis',
+      }),
+      required: true,
+    },
+    type: {
+      types: ['string'],
+      help: i18n.translate('visTypeXy.function.categoryAxis.type.help', {
+        defaultMessage: 'Type of the category axis',
+      }),
+      required: true,
+    },
+    titleText: {
+      types: ['string'],
+      help: i18n.translate('visTypeXy.function.categoryAxis.titleText.help', {
+        defaultMessage: 'Title text of the category axis',
+      }),
+    },
+    scale: {
+      types: ['vis_scale'],
+      help: i18n.translate('visTypeXy.function.categoryAxis.scale.help', {
+        defaultMessage: 'Scale config',
+      }),
+    },
+    labels: {
+      types: ['label'],
+      help: i18n.translate('visTypeXy.function.categoryAxis.labels.help', {
+        defaultMessage: 'Axis label config',
+      }),
+    },
+  },
+  fn: (context, args) => {
+    return {
+      type: 'category_axis',
+      id: args.id,
+      show: args.show,
+      position: args.position,
+      axisType: args.type,
+      title: {
+        text: args.titleText,
+      },
+      scale: {
+        ...args.scale,
+        type: args.scale.scaleType,
+      },
+      labels: args.labels,
+    };
+  },
+});

src/plugins/vis_type_xy/public/expression_functions/label.ts

@@ -0,0 +1,89 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
+ */
+
+import { i18n } from '@kbn/i18n';
+import { Labels } from '../../../charts/public';
+import {
+  ExpressionFunctionDefinition,
+  Datatable,
+  ExpressionValueBoxed,
+} from '../../../expressions/public';
+
+export type ExpressionValueLabel = ExpressionValueBoxed<
+  'label',
+  {
+    color?: Labels['color'];
+    filter?: Labels['filter'];
+    overwriteColor?: Labels['overwriteColor'];
+    rotate?: Labels['rotate'];
+    show?: Labels['show'];
+    truncate?: Labels['truncate'];
+  }
+>;
+
+export const label = (): ExpressionFunctionDefinition<
+  'label',
+  Datatable | null,
+  Labels,
+  ExpressionValueLabel
+> => ({
+  name: 'label',
+  help: i18n.translate('visTypeXy.function.label.help', {
+    defaultMessage: 'Generates label object',
+  }),
+  type: 'label',
+  args: {
+    color: {
+      types: ['string'],
+      help: i18n.translate('visTypeXy.function.label.color.help', {
+        defaultMessage: 'Color of label',
+      }),
+    },
+    filter: {
+      types: ['boolean'],
+      help: i18n.translate('visTypeXy.function.label.filter.help', {
+        defaultMessage: 'filter',
+      }),
+    },
+    overwriteColor: {
+      types: ['boolean'],
+      help: i18n.translate('visTypeXy.function.label.overwriteColor.help', {
+        defaultMessage: 'Overwrite color',
+      }),
+    },
+    rotate: {
+      types: ['number'],
+      help: i18n.translate('visTypeXy.function.label.rotate.help', {
+        defaultMessage: 'Rotate angle',
+      }),
+    },
+    show: {
+      types: ['boolean'],
+      help: i18n.translate('visTypeXy.function.label.show.help', {
+        defaultMessage: 'Show label',
+      }),
+    },
+    truncate: {
+      types: ['number', 'null'],
+      help: i18n.translate('visTypeXy.function.label.truncate.help', {
+        defaultMessage: 'The number of symbols before truncating',
+      }),
+    },
+  },
+  fn: (context, args) => {
+    return {
+      type: 'label',
+      color: args.color,
+      filter: args.hasOwnProperty('filter') ? args.filter : undefined,
+      overwriteColor: args.overwriteColor,
+      rotate: args.rotate,
+      show: args.show,
+      truncate: args.truncate,
+    };
+  },
+});