react-native-devtools-frontend/front_end/sources/ScriptFormatterEditorAction.js

// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import * as Common from '../common/common.js';
import * as FormatterModule from '../formatter/formatter.js';
import * as Persistence from '../persistence/persistence.js';
import * as SourceFrame from '../source_frame/source_frame.js';
import * as UI from '../ui/ui.js';
import * as Workspace from '../workspace/workspace.js';

import {EditorAction, Events, SourcesView} from './SourcesView.js';  // eslint-disable-line no-unused-vars

/**
 * @implements {EditorAction}
 */
export class ScriptFormatterEditorAction {
  constructor() {
    /** @type {!Set<string>} */
    this._pathsToFormatOnLoad = new Set();

    /** @type {!SourcesView} */
    this._sourcesView;
    /** @type {!UI.Toolbar.ToolbarButton} */
    this._button;
  }

  /**
   * @param {!Common.EventTarget.EventTargetEvent} event
   */
  _editorSelected(event) {
    const uiSourceCode = /** @type {!Workspace.UISourceCode.UISourceCode} */ (event.data);
    this._updateButton(uiSourceCode);

    if (this._isFormatableScript(uiSourceCode) && this._pathsToFormatOnLoad.has(uiSourceCode.url()) &&
        !FormatterModule.SourceFormatter.SourceFormatter.instance().hasFormatted(uiSourceCode)) {
      this._showFormatted(uiSourceCode);
    }
  }

  /**
   * @param {!Common.EventTarget.EventTargetEvent} event
   */
  async _editorClosed(event) {
    const uiSourceCode = /** @type {!Workspace.UISourceCode.UISourceCode} */ (event.data.uiSourceCode);
    const wasSelected = /** @type {boolean} */ (event.data.wasSelected);

    if (wasSelected) {
      this._updateButton(null);
    }
    const original =
        await FormatterModule.SourceFormatter.SourceFormatter.instance().discardFormattedUISourceCode(uiSourceCode);
    if (original) {
      this._pathsToFormatOnLoad.delete(original.url());
    }
  }

  /**
   * @param {?Workspace.UISourceCode.UISourceCode} uiSourceCode
   */
  _updateButton(uiSourceCode) {
    const isFormattable = this._isFormatableScript(uiSourceCode);
    this._button.element.classList.toggle('hidden', !isFormattable);
    if (uiSourceCode) {
      // We always update the title of the button, even if the {uiSourceCode} is
      // not formattable, since we use the title (the aria-label actually) as a
      // signal for the E2E tests that the source code loading is done.
      this._button.setTitle(Common.UIString.UIString(`Pretty print ${uiSourceCode.name()}`));
    }
  }

  /**
   * @override
   * @param {!SourcesView} sourcesView
   * @return {!UI.Toolbar.ToolbarButton}
   */
  button(sourcesView) {
    if (this._button) {
      return this._button;
    }

    this._sourcesView = sourcesView;
    this._sourcesView.addEventListener(Events.EditorSelected, event => {
      this._editorSelected(event);
    });
    this._sourcesView.addEventListener(Events.EditorClosed, event => {
      this._editorClosed(event);
    });

    this._button = new UI.Toolbar.ToolbarButton(Common.UIString.UIString('Pretty print'), 'largeicon-pretty-print');
    this._button.addEventListener(UI.Toolbar.ToolbarButton.Events.Click, this.toggleFormatScriptSource, this);
    this._updateButton(sourcesView.currentUISourceCode());

    return this._button;
  }

  /**
   * @param {?Workspace.UISourceCode.UISourceCode} uiSourceCode
   * @return {boolean}
   */
  _isFormatableScript(uiSourceCode) {
    if (!uiSourceCode) {
      return false;
    }
    if (uiSourceCode.project().canSetFileContent()) {
      return false;
    }
    if (uiSourceCode.project().type() === Workspace.Workspace.projectTypes.Formatter) {
      return false;
    }
    if (Persistence.Persistence.PersistenceImpl.instance().binding(uiSourceCode)) {
      return false;
    }
    if (uiSourceCode.mimeType() === 'application/wasm') {
      return false;
    }
    return uiSourceCode.contentType().hasScripts();
  }

  isCurrentUISourceCodeFormatable() {
    const uiSourceCode = this._sourcesView.currentUISourceCode();
    return this._isFormatableScript(uiSourceCode);
  }

  /**
   * @param {!Common.EventTarget.EventTargetEvent} event
   */
  toggleFormatScriptSource(event) {
    const uiSourceCode = this._sourcesView.currentUISourceCode();
    if (!uiSourceCode || !this._isFormatableScript(uiSourceCode)) {
      return;
    }
    this._pathsToFormatOnLoad.add(uiSourceCode.url());
    this._showFormatted(uiSourceCode);
  }

  /**
   * @param {!Workspace.UISourceCode.UISourceCode} uiSourceCode
   */
  async _showFormatted(uiSourceCode) {
    const formatData = await FormatterModule.SourceFormatter.SourceFormatter.instance().format(uiSourceCode);
    if (uiSourceCode !== this._sourcesView.currentUISourceCode()) {
      return;
    }
    const sourceFrame = this._sourcesView.viewForFile(uiSourceCode);
    let start = [0, 0];
    if (sourceFrame instanceof SourceFrame.SourceFrame.SourceFrameImpl) {
      const selection = sourceFrame.selection();
      start = formatData.mapping.originalToFormatted(selection.startLine, selection.startColumn);
    }
    this._sourcesView.showSourceLocation(formatData.formattedSourceCode, start[0], start[1]);
  }
}