| 1 | /** |
| 2 | * Copyright (c) Meta Platforms, Inc. and affiliates. |
| 3 | * |
| 4 | * This source code is licensed under the MIT license found in the |
| 5 | * LICENSE file in the root directory of this source tree. |
| 6 | * |
| 7 | * @flow |
| 8 | */ |
| 9 | |
| 10 | import * as React from 'react'; |
| 11 | import { |
| 12 | Fragment, |
| 13 | Suspense, |
| 14 | startTransition, |
| 15 | useCallback, |
| 16 | useContext, |
| 17 | useEffect, |
| 18 | useMemo, |
| 19 | useRef, |
| 20 | useState, |
| 21 | } from 'react'; |
| 22 | import AutoSizer from 'react-virtualized-auto-sizer'; |
| 23 | import {FixedSizeList} from 'react-window'; |
| 24 | import {TreeDispatcherContext, TreeStateContext} from './TreeContext'; |
| 25 | import Icon from '../Icon'; |
| 26 | import {SettingsContext} from '../Settings/SettingsContext'; |
| 27 | import {BridgeContext, StoreContext, OptionsContext} from '../context'; |
| 28 | import ComponentsTreeElement from './Element'; |
| 29 | import InspectHostNodesToggle from './InspectHostNodesToggle'; |
| 30 | import OwnersStack from './OwnersStack'; |
| 31 | import ComponentSearchInput from './ComponentSearchInput'; |
| 32 | import SettingsModalContextToggle from 'react-devtools-shared/src/devtools/views/Settings/SettingsModalContextToggle'; |
| 33 | import TreeFocusedContext from './TreeFocusedContext'; |
| 34 | import {useHighlightHostInstance, useSubscription} from '../hooks'; |
| 35 | import {clearErrorsAndWarnings as clearErrorsAndWarningsAPI} from 'react-devtools-shared/src/backendAPI'; |
| 36 | import styles from './Tree.css'; |
| 37 | import ButtonIcon from '../ButtonIcon'; |
| 38 | import Button from '../Button'; |
| 39 | import {logEvent} from 'react-devtools-shared/src/Logger'; |
| 40 | import {useExtensionComponentsPanelVisibility} from 'react-devtools-shared/src/frontend/hooks/useExtensionComponentsPanelVisibility'; |
| 41 | import {ElementTypeActivity} from 'react-devtools-shared/src/frontend/types'; |
| 42 | import {useChangeOwnerAction} from './OwnersListContext'; |
| 43 | import {useChangeActivitySliceAction} from '../SuspenseTab/ActivityList'; |
| 44 | import ActivitySlice from './ActivitySlice'; |
| 45 | |
| 46 | // Indent for each node at level N, compared to node at level N - 1. |
| 47 | const INDENTATION_SIZE = 10; |
| 48 | |
| 49 | function calculateElementOffset(elementDepth: number): number { |
| 50 | return elementDepth * INDENTATION_SIZE; |
| 51 | } |
| 52 | |
| 53 | export type ItemData = { |
| 54 | isNavigatingWithKeyboard: boolean, |
| 55 | onElementMouseEnter: (id: number) => void, |
| 56 | treeFocused: boolean, |
| 57 | calculateElementOffset: (depth: number) => number, |
| 58 | }; |
| 59 | |
| 60 | function calculateInitialScrollOffset( |
| 61 | inspectedElementIndex: number | null, |
| 62 | elementHeight: number, |
| 63 | ): number | void { |
| 64 | if (inspectedElementIndex === null) { |
| 65 | return undefined; |
| 66 | } |
| 67 | |
| 68 | if (inspectedElementIndex < 3) { |
| 69 | return undefined; |
| 70 | } |
| 71 | |
| 72 | // Make 3 elements on top of the inspected one visible |
| 73 | return (inspectedElementIndex - 3) * elementHeight; |
| 74 | } |
| 75 | |
| 76 | export default function Tree(): React.Node { |
| 77 | const dispatch = useContext(TreeDispatcherContext); |
| 78 | const { |
| 79 | activityID, |
| 80 | numElements, |
| 81 | ownerID, |
| 82 | searchIndex, |
| 83 | searchResults, |
| 84 | inspectedElementID, |
| 85 | inspectedElementIndex, |
| 86 | } = useContext(TreeStateContext); |
| 87 | const bridge = useContext(BridgeContext); |
| 88 | const store = useContext(StoreContext); |
| 89 | const {hideSettings} = useContext(OptionsContext); |
| 90 | const {lineHeight} = useContext(SettingsContext); |
| 91 | |
| 92 | const [isNavigatingWithKeyboard, setIsNavigatingWithKeyboard] = |
| 93 | useState(false); |
| 94 | const {highlightHostInstance, clearHighlightHostInstance} = |
| 95 | useHighlightHostInstance(); |
| 96 | const [treeFocused, setTreeFocused] = useState<boolean>(false); |
| 97 | const componentsPanelVisible = useExtensionComponentsPanelVisibility(bridge); |
| 98 | |
| 99 | const treeRef = useRef<HTMLDivElement | null>(null); |
| 100 | const focusTargetRef = useRef<HTMLDivElement | null>(null); |
| 101 | const listDOMElementRef = useRef<Element | null>(null); |
| 102 | const setListDOMElementRef = useCallback((listDOMElement: Element) => { |
| 103 | listDOMElementRef.current = listDOMElement; |
| 104 | |
| 105 | // Controls the initial horizontal offset of the Tree if the element was pre-selected. For example, via Elements panel in browser DevTools. |
| 106 | // Initial vertical offset is controlled via initialScrollOffset prop of the FixedSizeList component. |
| 107 | if ( |
| 108 | !componentsPanelVisible || |
| 109 | inspectedElementIndex == null || |
| 110 | listDOMElement == null |
| 111 | ) { |
| 112 | return; |
| 113 | } |
| 114 | |
| 115 | const element = store.getElementAtIndex(inspectedElementIndex); |
| 116 | if (element == null) { |
| 117 | return; |
| 118 | } |
| 119 | |
| 120 | const viewportLeft = listDOMElement.scrollLeft; |
| 121 | const viewportRight = viewportLeft + listDOMElement.clientWidth; |
| 122 | const elementLeft = calculateElementOffset(element.depth); |
| 123 | // Because of virtualization, this element might not be rendered yet; we can't look up its width. |
| 124 | // Assuming that it may take up to the half of the viewport. |
| 125 | const elementRight = elementLeft + listDOMElement.clientWidth / 2; |
| 126 | |
| 127 | const isElementFullyVisible = |
| 128 | elementLeft >= viewportLeft && elementRight <= viewportRight; |
| 129 | |
| 130 | if (!isElementFullyVisible) { |
| 131 | const horizontalDelta = |
| 132 | Math.min(0, elementLeft - viewportLeft) + |
| 133 | Math.max(0, elementRight - viewportRight); |
| 134 | |
| 135 | // $FlowExpectedError[incompatible-type] Flow doesn't support instant as an option for behavior. |
| 136 | listDOMElement.scrollBy({ |
| 137 | left: horizontalDelta, |
| 138 | behavior: 'instant', |
| 139 | }); |
| 140 | } |
| 141 | }, []); |
| 142 | |
| 143 | useEffect(() => { |
| 144 | if (!componentsPanelVisible || inspectedElementIndex == null) { |
| 145 | return; |
| 146 | } |
| 147 | |
| 148 | const listDOMElement = listDOMElementRef.current; |
| 149 | if (listDOMElement == null) { |
| 150 | return; |
| 151 | } |
| 152 | |
| 153 | const viewportHeight = listDOMElement.clientHeight; |
| 154 | const viewportLeft = listDOMElement.scrollLeft; |
| 155 | const viewportRight = viewportLeft + listDOMElement.clientWidth; |
| 156 | const viewportTop = listDOMElement.scrollTop; |
| 157 | const viewportBottom = viewportTop + viewportHeight; |
| 158 | |
| 159 | const element = store.getElementAtIndex(inspectedElementIndex); |
| 160 | if (element == null) { |
| 161 | return; |
| 162 | } |
| 163 | const elementLeft = calculateElementOffset(element.depth); |
| 164 | // Because of virtualization, this element might not be rendered yet; we can't look up its width. |
| 165 | // Assuming that it may take up to the half of the viewport. |
| 166 | const elementRight = elementLeft + listDOMElement.clientWidth / 2; |
| 167 | const elementTop = inspectedElementIndex * lineHeight; |
| 168 | const elementBottom = elementTop + lineHeight; |
| 169 | |
| 170 | const isElementFullyVisible = |
| 171 | elementTop >= viewportTop && |
| 172 | elementBottom <= viewportBottom && |
| 173 | elementLeft >= viewportLeft && |
| 174 | elementRight <= viewportRight; |
| 175 | |
| 176 | if (!isElementFullyVisible) { |
| 177 | const verticalDelta = |
| 178 | Math.min(0, elementTop - viewportTop) + |
| 179 | Math.max(0, elementBottom - viewportBottom); |
| 180 | const horizontalDelta = |
| 181 | Math.min(0, elementLeft - viewportLeft) + |
| 182 | Math.max(0, elementRight - viewportRight); |
| 183 | |
| 184 | // $FlowExpectedError[incompatible-type] Flow doesn't support instant as an option for behavior. |
| 185 | listDOMElement.scrollBy({ |
| 186 | top: verticalDelta, |
| 187 | left: horizontalDelta, |
| 188 | behavior: treeFocused && ownerID == null ? 'smooth' : 'instant', |
| 189 | }); |
| 190 | } |
| 191 | }, [inspectedElementIndex, componentsPanelVisible, lineHeight]); |
| 192 | |
| 193 | // Picking an element in the inspector should put focus into the tree. |
| 194 | // If possible, navigation works right after picking a node. |
| 195 | // NOTE: This is not guaranteed to work, because browser extension panels are hosted inside an iframe. |
| 196 | useEffect(() => { |
| 197 | function handleStopInspectingHost(didSelectNode: boolean) { |
| 198 | if (didSelectNode && focusTargetRef.current !== null) { |
| 199 | focusTargetRef.current.focus(); |
| 200 | logEvent({ |
| 201 | event_name: 'select-element', |
| 202 | metadata: {source: 'inspector'}, |
| 203 | }); |
| 204 | } |
| 205 | } |
| 206 | bridge.addListener('stopInspectingHost', handleStopInspectingHost); |
| 207 | return () => |
| 208 | bridge.removeListener('stopInspectingHost', handleStopInspectingHost); |
| 209 | }, [bridge]); |
| 210 | |
| 211 | // Navigate the tree with up/down arrow keys. |
| 212 | useEffect(() => { |
| 213 | if (treeRef.current === null) { |
| 214 | return () => {}; |
| 215 | } |
| 216 | |
| 217 | const handleKeyDown = (event: KeyboardEvent) => { |
| 218 | if ((event as any).target.tagName === 'INPUT' || event.defaultPrevented) { |
| 219 | return; |
| 220 | } |
| 221 | |
| 222 | let element; |
| 223 | switch (event.key) { |
| 224 | case 'ArrowDown': |
| 225 | event.preventDefault(); |
| 226 | if (event.altKey) { |
| 227 | dispatch({type: 'SELECT_NEXT_SIBLING_IN_TREE'}); |
| 228 | } else { |
| 229 | dispatch({type: 'SELECT_NEXT_ELEMENT_IN_TREE'}); |
| 230 | } |
| 231 | break; |
| 232 | case 'ArrowLeft': |
| 233 | event.preventDefault(); |
| 234 | element = |
| 235 | inspectedElementID !== null |
| 236 | ? store.getElementByID(inspectedElementID) |
| 237 | : null; |
| 238 | if (element !== null) { |
| 239 | if (event.altKey) { |
| 240 | // $FlowFixMe[invalid-compare] |
| 241 | if (element.ownerID !== null) { |
| 242 | dispatch({type: 'SELECT_OWNER_LIST_PREVIOUS_ELEMENT_IN_TREE'}); |
| 243 | } |
| 244 | } else { |
| 245 | if (element.children.length > 0 && !element.isCollapsed) { |
| 246 | store.toggleIsCollapsed(element.id, true); |
| 247 | } else { |
| 248 | dispatch({type: 'SELECT_PARENT_ELEMENT_IN_TREE'}); |
| 249 | } |
| 250 | } |
| 251 | } |
| 252 | break; |
| 253 | case 'ArrowRight': |
| 254 | event.preventDefault(); |
| 255 | element = |
| 256 | inspectedElementID !== null |
| 257 | ? store.getElementByID(inspectedElementID) |
| 258 | : null; |
| 259 | if (element !== null) { |
| 260 | if (event.altKey) { |
| 261 | dispatch({type: 'SELECT_OWNER_LIST_NEXT_ELEMENT_IN_TREE'}); |
| 262 | } else { |
| 263 | if (element.children.length > 0 && element.isCollapsed) { |
| 264 | store.toggleIsCollapsed(element.id, false); |
| 265 | } else { |
| 266 | dispatch({type: 'SELECT_CHILD_ELEMENT_IN_TREE'}); |
| 267 | } |
| 268 | } |
| 269 | } |
| 270 | break; |
| 271 | case 'ArrowUp': |
| 272 | event.preventDefault(); |
| 273 | if (event.altKey) { |
| 274 | dispatch({type: 'SELECT_PREVIOUS_SIBLING_IN_TREE'}); |
| 275 | } else { |
| 276 | dispatch({type: 'SELECT_PREVIOUS_ELEMENT_IN_TREE'}); |
| 277 | } |
| 278 | break; |
| 279 | default: |
| 280 | return; |
| 281 | } |
| 282 | setIsNavigatingWithKeyboard(true); |
| 283 | }; |
| 284 | |
| 285 | // We used to listen to at the document level for this event. |
| 286 | // That allowed us to listen to up/down arrow key events while another section |
| 287 | // of DevTools (like the search input) was focused. |
| 288 | // This was a minor UX positive. |
| 289 | // |
| 290 | // (We had to use ownerDocument rather than document for this, because the |
| 291 | // DevTools extension renders the Components and Profiler tabs into portals.) |
| 292 | // |
| 293 | // This approach caused a problem though: it meant that a react-devtools-inline |
| 294 | // instance could steal (and prevent/block) keyboard events from other JavaScript |
| 295 | // on the page– which could even include other react-devtools-inline instances. |
| 296 | // This is a potential major UX negative. |
| 297 | // |
| 298 | // Given the above trade offs, we now listen on the root of the Tree itself. |
| 299 | const container = treeRef.current; |
| 300 | container.addEventListener('keydown', handleKeyDown); |
| 301 | |
| 302 | return () => { |
| 303 | container.removeEventListener('keydown', handleKeyDown); |
| 304 | }; |
| 305 | }, [dispatch, inspectedElementID, store]); |
| 306 | |
| 307 | // Focus management. |
| 308 | const handleBlur = useCallback(() => setTreeFocused(false), []); |
| 309 | const handleFocus = useCallback(() => setTreeFocused(true), []); |
| 310 | |
| 311 | const changeActivitySliceAction = useChangeActivitySliceAction(); |
| 312 | const changeOwnerAction = useChangeOwnerAction(); |
| 313 | const handleKeyPress = useCallback( |
| 314 | (event: $FlowFixMe) => { |
| 315 | switch (event.key) { |
| 316 | case 'Enter': |
| 317 | case ' ': |
| 318 | if (inspectedElementID !== null) { |
| 319 | const inspectedElement = store.getElementByID(inspectedElementID); |
| 320 | startTransition(() => { |
| 321 | if ( |
| 322 | inspectedElement !== null && |
| 323 | inspectedElement.type === ElementTypeActivity |
| 324 | ) { |
| 325 | changeActivitySliceAction(inspectedElementID); |
| 326 | } else { |
| 327 | changeOwnerAction(inspectedElementID); |
| 328 | } |
| 329 | }); |
| 330 | } |
| 331 | break; |
| 332 | default: |
| 333 | break; |
| 334 | } |
| 335 | }, |
| 336 | [dispatch, inspectedElementID], |
| 337 | ); |
| 338 | |
| 339 | // If we switch the selected element while using the keyboard, |
| 340 | // start highlighting it in the DOM instead of the last hovered node. |
| 341 | const searchRef = useRef({searchIndex, searchResults}); |
| 342 | useEffect(() => { |
| 343 | let didSelectNewSearchResult = false; |
| 344 | if ( |
| 345 | searchRef.current.searchIndex !== searchIndex || |
| 346 | searchRef.current.searchResults !== searchResults |
| 347 | ) { |
| 348 | searchRef.current.searchIndex = searchIndex; |
| 349 | searchRef.current.searchResults = searchResults; |
| 350 | didSelectNewSearchResult = true; |
| 351 | } |
| 352 | if (isNavigatingWithKeyboard || didSelectNewSearchResult) { |
| 353 | if (inspectedElementID !== null) { |
| 354 | highlightHostInstance(inspectedElementID); |
| 355 | } else { |
| 356 | clearHighlightHostInstance(); |
| 357 | } |
| 358 | } |
| 359 | }, [ |
| 360 | bridge, |
| 361 | isNavigatingWithKeyboard, |
| 362 | highlightHostInstance, |
| 363 | searchIndex, |
| 364 | searchResults, |
| 365 | inspectedElementID, |
| 366 | ]); |
| 367 | |
| 368 | // Highlight last hovered element. |
| 369 | const handleElementMouseEnter = useCallback( |
| 370 | (id: $FlowFixMe) => { |
| 371 | // Ignore hover while we're navigating with keyboard. |
| 372 | // This avoids flicker from the hovered nodes under the mouse. |
| 373 | if (!isNavigatingWithKeyboard) { |
| 374 | highlightHostInstance(id); |
| 375 | } |
| 376 | }, |
| 377 | [isNavigatingWithKeyboard, highlightHostInstance], |
| 378 | ); |
| 379 | |
| 380 | const handleMouseMove = useCallback(() => { |
| 381 | // We started using the mouse again. |
| 382 | // This will enable hover styles in individual rows. |
| 383 | setIsNavigatingWithKeyboard(false); |
| 384 | }, []); |
| 385 | |
| 386 | const handleMouseLeave = clearHighlightHostInstance; |
| 387 | |
| 388 | // The synthetic onMouseLeave on the tree div only fires within the document, |
| 389 | // so we need a native listener on the document itself. |
| 390 | useEffect(() => { |
| 391 | const container = focusTargetRef.current; |
| 392 | if (container == null) { |
| 393 | return; |
| 394 | } |
| 395 | const ownerDocument = container.ownerDocument; |
| 396 | ownerDocument.addEventListener('mouseleave', clearHighlightHostInstance); |
| 397 | return () => { |
| 398 | ownerDocument.removeEventListener( |
| 399 | 'mouseleave', |
| 400 | clearHighlightHostInstance, |
| 401 | ); |
| 402 | }; |
| 403 | }, [clearHighlightHostInstance]); |
| 404 | |
| 405 | // Let react-window know to re-render any time the underlying tree data changes. |
| 406 | // This includes the owner context, since it controls a filtered view of the tree. |
| 407 | const itemData = useMemo<ItemData>( |
| 408 | () => ({ |
| 409 | isNavigatingWithKeyboard, |
| 410 | onElementMouseEnter: handleElementMouseEnter, |
| 411 | treeFocused, |
| 412 | calculateElementOffset, |
| 413 | }), |
| 414 | [ |
| 415 | isNavigatingWithKeyboard, |
| 416 | handleElementMouseEnter, |
| 417 | treeFocused, |
| 418 | calculateElementOffset, |
| 419 | ], |
| 420 | ); |
| 421 | |
| 422 | const itemKey = useCallback( |
| 423 | (index: number) => store.getElementIDAtIndex(index), |
| 424 | [store], |
| 425 | ); |
| 426 | |
| 427 | const handlePreviousErrorOrWarningClick = React.useCallback(() => { |
| 428 | dispatch({type: 'SELECT_PREVIOUS_ELEMENT_WITH_ERROR_OR_WARNING_IN_TREE'}); |
| 429 | }, []); |
| 430 | |
| 431 | const handleNextErrorOrWarningClick = React.useCallback(() => { |
| 432 | dispatch({type: 'SELECT_NEXT_ELEMENT_WITH_ERROR_OR_WARNING_IN_TREE'}); |
| 433 | }, []); |
| 434 | |
| 435 | const errorsOrWarningsSubscription = useMemo( |
| 436 | () => ({ |
| 437 | getCurrentValue: () => ({ |
| 438 | errors: store.componentWithErrorCount, |
| 439 | warnings: store.componentWithWarningCount, |
| 440 | }), |
| 441 | subscribe: (callback: Function) => { |
| 442 | store.addListener('mutated', callback); |
| 443 | return () => store.removeListener('mutated', callback); |
| 444 | }, |
| 445 | }), |
| 446 | [store], |
| 447 | ); |
| 448 | const {errors, warnings} = useSubscription(errorsOrWarningsSubscription); |
| 449 | |
| 450 | const clearErrorsAndWarnings = () => { |
| 451 | clearErrorsAndWarningsAPI({bridge, store}); |
| 452 | }; |
| 453 | |
| 454 | const zeroElementsNotice = ( |
| 455 | <div className={styles.ZeroElementsNotice}> |
| 456 | <p>Loading React Element Tree...</p> |
| 457 | <p> |
| 458 | If this seems stuck, please follow the{' '} |
| 459 | <a |
| 460 | className={styles.Link} |
| 461 | href="https://github.com/facebook/react/blob/main/packages/react-devtools/README.md#the-react-tab-shows-no-components" |
| 462 | target="_blank"> |
| 463 | troubleshooting instructions |
| 464 | </a> |
| 465 | . |
| 466 | </p> |
| 467 | </div> |
| 468 | ); |
| 469 | |
| 470 | return ( |
| 471 | <TreeFocusedContext.Provider value={treeFocused}> |
| 472 | <div className={styles.Tree} ref={treeRef}> |
| 473 | <div className={styles.SearchInput}> |
| 474 | {store.supportsClickToInspect && ( |
| 475 | <Fragment> |
| 476 | <InspectHostNodesToggle /> |
| 477 | <div className={styles.VRule} /> |
| 478 | </Fragment> |
| 479 | )} |
| 480 | <Suspense fallback={<Loading />}> |
| 481 | {ownerID !== null ? ( |
| 482 | <OwnersStack /> |
| 483 | ) : activityID !== null ? ( |
| 484 | <ActivitySlice /> |
| 485 | ) : ( |
| 486 | <ComponentSearchInput /> |
| 487 | )} |
| 488 | </Suspense> |
| 489 | {ownerID === null && (errors > 0 || warnings > 0) && ( |
| 490 | <React.Fragment> |
| 491 | <div className={styles.VRule} /> |
| 492 | {errors > 0 && ( |
| 493 | <div className={styles.IconAndCount}> |
| 494 | <Icon className={styles.ErrorIcon} type="error" /> |
| 495 | {errors} |
| 496 | </div> |
| 497 | )} |
| 498 | {warnings > 0 && ( |
| 499 | <div className={styles.IconAndCount}> |
| 500 | <Icon className={styles.WarningIcon} type="warning" /> |
| 501 | {warnings} |
| 502 | </div> |
| 503 | )} |
| 504 | <Button |
| 505 | onClick={handlePreviousErrorOrWarningClick} |
| 506 | title="Scroll to previous error or warning"> |
| 507 | <ButtonIcon type="up" /> |
| 508 | </Button> |
| 509 | <Button |
| 510 | onClick={handleNextErrorOrWarningClick} |
| 511 | title="Scroll to next error or warning"> |
| 512 | <ButtonIcon type="down" /> |
| 513 | </Button> |
| 514 | <Button |
| 515 | onClick={clearErrorsAndWarnings} |
| 516 | title="Clear all errors and warnings"> |
| 517 | <ButtonIcon type="clear" /> |
| 518 | </Button> |
| 519 | </React.Fragment> |
| 520 | )} |
| 521 | {!hideSettings && ( |
| 522 | <Fragment> |
| 523 | <div className={styles.VRule} /> |
| 524 | <SettingsModalContextToggle /> |
| 525 | </Fragment> |
| 526 | )} |
| 527 | </div> |
| 528 | {numElements === 0 ? ( |
| 529 | zeroElementsNotice |
| 530 | ) : ( |
| 531 | <div |
| 532 | className={styles.AutoSizerWrapper} |
| 533 | onBlur={handleBlur} |
| 534 | onFocus={handleFocus} |
| 535 | onKeyPress={handleKeyPress} |
| 536 | onMouseMove={handleMouseMove} |
| 537 | onMouseLeave={handleMouseLeave} |
| 538 | ref={focusTargetRef} |
| 539 | tabIndex={0}> |
| 540 | <AutoSizer> |
| 541 | {({height, width}) => ( |
| 542 | <FixedSizeList |
| 543 | className={styles.List} |
| 544 | height={height} |
| 545 | initialScrollOffset={calculateInitialScrollOffset( |
| 546 | inspectedElementIndex, |
| 547 | lineHeight, |
| 548 | )} |
| 549 | innerElementType={InnerElementType} |
| 550 | itemCount={numElements} |
| 551 | itemData={itemData} |
| 552 | itemKey={itemKey} |
| 553 | itemSize={lineHeight} |
| 554 | outerRef={setListDOMElementRef} |
| 555 | overscanCount={10} |
| 556 | width={width}> |
| 557 | {ComponentsTreeElement} |
| 558 | </FixedSizeList> |
| 559 | )} |
| 560 | </AutoSizer> |
| 561 | </div> |
| 562 | )} |
| 563 | </div> |
| 564 | </TreeFocusedContext.Provider> |
| 565 | ); |
| 566 | } |
| 567 | |
| 568 | // $FlowFixMe[missing-local-annot] |
| 569 | function InnerElementType({children, style}) { |
| 570 | const store = useContext(StoreContext); |
| 571 | |
| 572 | const {height} = style; |
| 573 | const maxDepth = store.getMaximumRecordedDepth(); |
| 574 | // Maximum possible indentation plus some arbitrary offset for the node content. |
| 575 | const width = calculateElementOffset(maxDepth) + 500; |
| 576 | |
| 577 | return ( |
| 578 | <div className={styles.InnerElementType} style={{height, width}}> |
| 579 | {children} |
| 580 | |
| 581 | <VerticalDelimiter /> |
| 582 | </div> |
| 583 | ); |
| 584 | } |
| 585 | |
| 586 | function VerticalDelimiter() { |
| 587 | const store = useContext(StoreContext); |
| 588 | const {ownerID, inspectedElementIndex} = useContext(TreeStateContext); |
| 589 | const {lineHeight} = useContext(SettingsContext); |
| 590 | |
| 591 | if (ownerID != null || inspectedElementIndex == null) { |
| 592 | return null; |
| 593 | } |
| 594 | |
| 595 | const element = store.getElementAtIndex(inspectedElementIndex); |
| 596 | if (element == null) { |
| 597 | return null; |
| 598 | } |
| 599 | const indexOfLowestDescendant = |
| 600 | store.getIndexOfLowestDescendantElement(element); |
| 601 | if (indexOfLowestDescendant == null) { |
| 602 | return null; |
| 603 | } |
| 604 | |
| 605 | const delimiterLeft = calculateElementOffset(element.depth) + 12; |
| 606 | const delimiterTop = (inspectedElementIndex + 1) * lineHeight; |
| 607 | const delimiterHeight = |
| 608 | (indexOfLowestDescendant + 1) * lineHeight - delimiterTop; |
| 609 | |
| 610 | return ( |
| 611 | <div |
| 612 | className={styles.VerticalDelimiter} |
| 613 | style={{ |
| 614 | left: delimiterLeft, |
| 615 | top: delimiterTop, |
| 616 | height: delimiterHeight, |
| 617 | }} |
| 618 | /> |
| 619 | ); |
| 620 | } |
| 621 | |
| 622 | function Loading() { |
| 623 | return <div className={styles.Loading}>Loading...</div>; |
| 624 | } |