-
Notifications
You must be signed in to change notification settings - Fork 3.4k
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
- Loading branch information
Showing
12 changed files
with
367 additions
and
41 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,124 @@ | ||
| type Rect = { | ||
| top: number; | ||
| right: number; | ||
| bottom: number; | ||
| left: number; | ||
| }; | ||
|
|
||
| const getParentElement = (element: Node): Element | null => | ||
| element.parentElement || (element.getRootNode() as ShadowRoot).host || null; | ||
|
|
||
| const getElementRect = (element: Element): Rect => { | ||
| const rect = element.getBoundingClientRect(); | ||
| const scaleX = | ||
| ('offsetWidth' in element && | ||
| rect.width / (element as HTMLElement).offsetWidth) || | ||
| 1; | ||
| const scaleY = | ||
| ('offsetHeight' in element && | ||
| rect.height / (element as HTMLElement).offsetHeight) || | ||
| 1; | ||
| return { | ||
| top: rect.top, | ||
| right: rect.left + element.clientWidth * scaleX, | ||
| bottom: rect.top + element.clientHeight * scaleY, | ||
| left: rect.left, | ||
| }; | ||
| }; | ||
|
|
||
| const paddingValueToInt = (value: string) => { | ||
| const number = parseInt(value, 10); | ||
| return Number.isNaN(number) ? 0 : number; | ||
| }; | ||
|
|
||
| // Follow the steps described in https://www.w3.org/TR/cssom-view-1/#element-scrolling-members, | ||
| // assuming that the scroll option is set to 'nearest'. | ||
| const getScrollDistance = ( | ||
| targetStart: number, | ||
| targetEnd: number, | ||
| scrollStart: number, | ||
| scrollEnd: number, | ||
| scrollPaddingStart: number, | ||
| scrollPaddingEnd: number, | ||
| ) => { | ||
| if (targetStart < scrollStart && targetEnd > scrollEnd) { | ||
| return 0; | ||
| } | ||
|
|
||
| if (targetStart < scrollStart) { | ||
| return -(scrollStart - targetStart + scrollPaddingStart); | ||
| } | ||
|
|
||
| if (targetEnd > scrollEnd) { | ||
| return targetEnd - targetStart > scrollEnd - scrollStart | ||
| ? targetStart + scrollPaddingStart - scrollStart | ||
| : targetEnd - scrollEnd + scrollPaddingEnd; | ||
| } | ||
| return 0; | ||
| }; | ||
|
|
||
| const scrollRectIntoView = (root: HTMLElement, targetRect: Rect) => { | ||
| const document = root.ownerDocument; | ||
|
|
||
| let rect = targetRect; | ||
|
|
||
| let current: Element | null = root; | ||
| while (current) { | ||
| const isDocumentBody = current === document.body; | ||
| const bounding = isDocumentBody | ||
| ? { | ||
| top: 0, | ||
| right: | ||
| window.visualViewport?.width ?? | ||
| document.documentElement.clientWidth, | ||
| bottom: | ||
| window.visualViewport?.height ?? | ||
| document.documentElement.clientHeight, | ||
| left: 0, | ||
| } | ||
| : getElementRect(current); | ||
|
|
||
| const style = getComputedStyle(current); | ||
| const scrollDistanceX = getScrollDistance( | ||
| rect.left, | ||
| rect.right, | ||
| bounding.left, | ||
| bounding.right, | ||
| paddingValueToInt(style.scrollPaddingLeft), | ||
| paddingValueToInt(style.scrollPaddingRight), | ||
| ); | ||
| const scrollDistanceY = getScrollDistance( | ||
| rect.top, | ||
| rect.bottom, | ||
| bounding.top, | ||
| bounding.bottom, | ||
| paddingValueToInt(style.scrollPaddingTop), | ||
| paddingValueToInt(style.scrollPaddingBottom), | ||
| ); | ||
| if (scrollDistanceX || scrollDistanceY) { | ||
| if (isDocumentBody) { | ||
| document.defaultView?.scrollBy(scrollDistanceX, scrollDistanceY); | ||
| } else { | ||
| const startX = current.scrollLeft, | ||
| startY = current.scrollTop; | ||
| if (scrollDistanceY) current.scrollTop += scrollDistanceY; | ||
| if (scrollDistanceX) current.scrollLeft += scrollDistanceX; | ||
| const scrolledX = current.scrollLeft - startX; | ||
| const scrolledY = current.scrollTop - startY; | ||
| rect = { | ||
| left: rect.left - scrolledX, | ||
| top: rect.top - scrolledY, | ||
| right: rect.right - scrolledX, | ||
| bottom: rect.bottom - scrolledY, | ||
| }; | ||
| } | ||
| } | ||
|
|
||
| current = | ||
| isDocumentBody || style.position === 'fixed' | ||
| ? null | ||
| : getParentElement(current); | ||
| } | ||
| }; | ||
|
|
||
| export default scrollRectIntoView; |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Some generated files are not rendered by default. Learn more about how customized files appear on GitHub.
Oops, something went wrong.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Oops, something went wrong.