All files / roosterjs-content-model-core/lib/coreApi/formatContentModel scrollCaretIntoView.ts

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import { getDOMInsertPointRect } from 'roosterjs-content-model-dom';
import type { EditorCore, ImageSelection, RangeSelection } from 'roosterjs-content-model-types';
 
/**
 * @internal
 */
export function scrollCaretIntoView(core: EditorCore, selection: RangeSelection | ImageSelection) {
    const rect = getDOMInsertPointRect(
        core.physicalRoot.ownerDocument,
        selection.type == 'image'
            ? {
                  node: selection.image,
                  offset: 0,
              }
            : selection.isReverted
            ? {
                  node: selection.range.startContainer,
                  offset: selection.range.startOffset,
              }
            : {
                  node: selection.range.endContainer,
                  offset: selection.range.endOffset,
              }
    );
    const visibleRect = core.api.getVisibleViewport(core);
    const scrollContainer = core.domEvent.scrollContainer;
 
    Eif (rect && visibleRect) {
        if (rect.bottom > visibleRect.bottom) {
            const zoomScale = core.domHelper.calculateZoomScale();
 
            scrollContainer.scrollTop += (rect.bottom - visibleRect.bottom) / zoomScale;
        } else if (rect.top < visibleRect.top) {
            const zoomScale = core.domHelper.calculateZoomScale();
 
            scrollContainer.scrollTop += (rect.top - visibleRect.top) / zoomScale;
        }
    }
}