polygerrit-ui/app/elements/edit/gr-edit-file-controls/gr-edit-file-controls.ts

/**
 * @license
 * Copyright 2017 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */
import '../../shared/gr-dropdown/gr-dropdown';
import {GrEditConstants} from '../gr-edit-constants';
import {sharedStyles} from '../../../styles/shared-styles';
import {FileActionTapEventDetail} from '../../../types/events';
import {LitElement, css, html} from 'lit';
import {customElement, property} from 'lit/decorators.js';
import {DropdownLink} from '../../shared/gr-dropdown/gr-dropdown';

interface EditAction {
  label: string;
  id: string;
}

@customElement('gr-edit-file-controls')
export class GrEditFileControls extends LitElement {
  /**
   * Fired when an action in the overflow menu is tapped.
   *
   * @event file-action-tap
   */

  @property({type: String})
  filePath?: string;

  @property({type: Array})
  _allFileActions = Object.values(GrEditConstants.Actions);

  static override get styles() {
    return [
      sharedStyles,
      css`
        :host {
          align-items: center;
          display: flex;
          justify-content: flex-end;
        }
        gr-dropdown {
          --gr-dropdown-item-color: var(--link-color);
          --gr-button-padding: var(--spacing-xs) var(--spacing-s);
          --gr-dropdown-item-background-color: transparent;
          --gr-dropdown-item-border: none;
          --gr-dropdown-item-text-transform: uppercase;
        }
        #actions {
          margin-right: var(--spacing-l);
        }
      `,
    ];
  }

  override render() {
    const fileActions = this._computeFileActions(this._allFileActions);
    return html` <gr-dropdown
      id="actions"
      .items=${fileActions}
      down-arrow=""
      vertical-offset="20"
      @tap-item=${this._handleActionTap}
      link=""
      >Actions</gr-dropdown
    >`;
  }

  _handleActionTap(e: CustomEvent<DropdownLink>) {
    e.preventDefault();
    e.stopPropagation();
    const actionId = e.detail.id;
    if (!actionId) return;
    if (!this.filePath) return;
    this._dispatchFileAction(actionId, this.filePath);
  }

  _dispatchFileAction(action: string, path: string) {
    this.dispatchEvent(
      new CustomEvent<FileActionTapEventDetail>('file-action-tap', {
        detail: {action, path},
        bubbles: true,
        composed: true,
      })
    );
  }

  _computeFileActions(actions: EditAction[]): DropdownLink[] {
    // TODO(kaspern): conditionally disable some actions based on file status.
    return actions.map(action => {
      return {
        name: action.label,
        id: action.id,
      };
    });
  }
}

declare global {
  interface HTMLElementTagNameMap {
    'gr-edit-file-controls': GrEditFileControls;
  }
}