grafana/public/app/features/dashboard/components/PanelEditor/utils.ts

import { CSSProperties } from 'react';
import { set as lodashSet, omit } from 'lodash';
import { FieldConfigSource, PanelPlugin } from '@grafana/data';
import { PanelModel } from '../../state/PanelModel';
import { DisplayMode } from './types';
import { GRID_CELL_HEIGHT, GRID_CELL_VMARGIN, GRID_COLUMN_COUNT } from 'app/core/constants';

export function calculatePanelSize(mode: DisplayMode, width: number, height: number, panel: PanelModel): CSSProperties {
  if (mode === DisplayMode.Fill) {
    return { width, height };
  }
  const colWidth = (window.innerWidth - GRID_CELL_VMARGIN * 4) / GRID_COLUMN_COUNT;
  const pWidth = colWidth * panel.gridPos.w;
  const pHeight = GRID_CELL_HEIGHT * panel.gridPos.h;
  const scale = Math.min(width / pWidth, height / pHeight);

  if (mode === DisplayMode.Exact && pWidth <= width && pHeight <= height) {
    return {
      width: pWidth,
      height: pHeight,
    };
  }

  return {
    width: pWidth * scale,
    height: pHeight * scale,
  };
}

export function supportsDataQuery(plugin: PanelPlugin | undefined): boolean {
  return plugin?.meta.skipDataQuery === false;
}

export const updateDefaultFieldConfigValue = (
  config: FieldConfigSource,
  name: string,
  value: any,
  isCustom?: boolean
) => {
  let defaults = { ...config.defaults };
  const remove = value === undefined || value === null || '';

  if (isCustom) {
    if (defaults.custom) {
      if (remove) {
        defaults.custom = omit(defaults.custom, name);
      } else {
        defaults.custom = lodashSet({ ...defaults.custom }, name, value);
      }
    } else if (!remove) {
      defaults.custom = lodashSet({ ...defaults.custom }, name, value);
    }
  } else if (remove) {
    defaults = omit(defaults, name);
  } else {
    defaults = lodashSet({ ...defaults }, name, value);
  }

  return {
    ...config,
    defaults,
  };
};