bbef38c2-b9dd-46f4-8180-1ef56bbede3e

Committed 08 Mar 2024 09:19AM UTC coverage: 48.043% (+19.3%) from 28.702%

Build # bbef38c2-b9dd-46f4-8180-1ef56bbede3e

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push

circleci

Committed by

pubuzhixing8

Commit Message

feat(core): support suppressThrow in toSlateRange/toSlatePoint/isLeafInEditor to check domSelection is valid

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402 of 1034 branches covered (38.88%)

Branch coverage included in aggregate %.

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/packages/src/plugins/angular-editor.ts

import { Editor, Node, Path, Point, Range, Transforms, Element, BaseEditor } from 'slate';
import {
    EDITOR_TO_ELEMENT,
    ELEMENT_TO_NODE,
    IS_FOCUSED,
    IS_READONLY,
    NODE_TO_INDEX,
    NODE_TO_PARENT,
    NODE_TO_ELEMENT,
    NODE_TO_KEY,
    EDITOR_TO_WINDOW
} from '../utils/weak-maps';
import {
    DOMElement,
    DOMNode,
    DOMPoint,
    DOMRange,
    DOMSelection,
    DOMStaticRange,
    hasShadowRoot,
    isDOMElement,
    isDOMSelection,
    normalizeDOMPoint
} from '../utils/dom';
import { Injector } from '@angular/core';
import { NodeEntry } from 'slate';
import { SlateError } from '../types/error';
import { Key } from '../utils/key';
import { IS_CHROME, IS_FIREFOX } from '../utils/environment';
import {
    FAKE_LEFT_BLOCK_CARD_OFFSET,
    FAKE_RIGHT_BLOCK_CARD_OFFSET,
    getCardTargetAttribute,
    isCardCenterByTargetAttr,
    isCardLeftByTargetAttr,
    isCardRightByTargetAttr
} from '../utils/block-card';
import { SafeAny } from '../types';

/**
 * An Angular and DOM-specific version of the `Editor` interface.
 */

export interface AngularEditor extends BaseEditor {
    insertData: (data: DataTransfer) => void;
    insertFragmentData: (data: DataTransfer) => boolean;
    insertTextData: (data: DataTransfer) => boolean;
    setFragmentData: (data: DataTransfer, originEvent?: 'drag' | 'copy' | 'cut') => void;
    deleteCutData: () => void;
    onKeydown: (event: KeyboardEvent) => void;
    onClick: (event: MouseEvent) => void;
    injector: Injector;
    isBlockCard: (node: Node) => boolean;
    isExpanded: (node: Element) => boolean;
    onError: (errorData: SlateError) => void;
    hasRange: (editor: AngularEditor, range: Range) => boolean;
}

export const AngularEditor = {
    /**
     * Return the host window of the current editor.
     */

    getWindow(editor: AngularEditor): Window {
        const window = EDITOR_TO_WINDOW.get(editor);
        if (!window) {
            throw new Error('Unable to find a host window element for this editor');
        }
        return window;
    },
    /**
     * Find a key for a Slate node.
     */

    findKey(editor: AngularEditor, node: Node): Key {
        let key = NODE_TO_KEY.get(node);

        if (!key) {
            key = new Key();
            NODE_TO_KEY.set(node, key);
        }

        return key;
    },

    /**
     * handle editor error.
     */

    onError(errorData: SlateError) {
        if (errorData.nativeError) {
            throw errorData.nativeError;
        }
    },

    /**
     * Find the path of Slate node.
     */

    findPath(editor: AngularEditor, node: Node): Path {
        const path: Path = [];
        let child = node;

        while (true) {
            const parent = NODE_TO_PARENT.get(child);

            if (parent == null) {
                if (Editor.isEditor(child) && child === editor) {
                    return path;
                } else {
                    break;
                }
            }

            const i = NODE_TO_INDEX.get(child);

            if (i == null) {
                break;
            }

            path.unshift(i);
            child = parent;
        }
        throw new Error(`Unable to find the path for Slate node: ${JSON.stringify(node)}`);
    },

    isNodeInEditor(editor: AngularEditor, node: Node): boolean {
        let child = node;

        while (true) {
            const parent = NODE_TO_PARENT.get(child);

            if (parent == null) {
                if (Editor.isEditor(child) && child === editor) {
                    return true;
                } else {
                    break;
                }
            }

            const i = NODE_TO_INDEX.get(child);

            if (i == null) {
                break;
            }

            child = parent;
        }

        return false;
    },

    /**
     * Find the DOM node that implements DocumentOrShadowRoot for the editor.
     */

    findDocumentOrShadowRoot(editor: AngularEditor): Document | ShadowRoot {
        const el = AngularEditor.toDOMNode(editor, editor);
        const root = el.getRootNode();
        if ((root instanceof Document || root instanceof ShadowRoot) && (root as Document).getSelection != null) {
            return root;
        }

        return el.ownerDocument;
    },

    /**
     * Check if the editor is focused.
     */

    isFocused(editor: AngularEditor): boolean {
        return !!IS_FOCUSED.get(editor);
    },

    /**
     * Check if the editor is in read-only mode.
     */

    isReadonly(editor: AngularEditor): boolean {
        return !!IS_READONLY.get(editor);
    },

    /**
     * Check if the editor is hanging right.
     */
    isBlockHangingRight(editor: AngularEditor): boolean {
        const { selection } = editor;
        if (!selection) {
            return false;
        }
        if (Range.isCollapsed(selection)) {
            return false;
        }
        const [start, end] = Range.edges(selection);
        const endBlock = Editor.above(editor, {
            at: end,
            match: node => Element.isElement(node) && Editor.isBlock(editor, node)
        });
        return Editor.isStart(editor, end, endBlock[1]);
    },

    /**
     * Blur the editor.
     */

    blur(editor: AngularEditor): void {
        const el = AngularEditor.toDOMNode(editor, editor);
        const root = AngularEditor.findDocumentOrShadowRoot(editor);
        IS_FOCUSED.set(editor, false);

        if (root.activeElement === el) {
            el.blur();
        }
    },

    /**
     * Focus the editor.
     */

    focus(editor: AngularEditor): void {
        const el = AngularEditor.toDOMNode(editor, editor);
        IS_FOCUSED.set(editor, true);

        const window = AngularEditor.getWindow(editor);
        if (window.document.activeElement !== el) {
            el.focus({ preventScroll: true });
        }
    },

    /**
     * Deselect the editor.
     */

    deselect(editor: AngularEditor): void {
        const { selection } = editor;
        const root = AngularEditor.findDocumentOrShadowRoot(editor);
        const domSelection = (root as Document).getSelection();

        if (domSelection && domSelection.rangeCount > 0) {
            domSelection.removeAllRanges();
        }

        if (selection) {
            Transforms.deselect(editor);
        }
    },

    /**
     * Check if a DOM node is within the editor.
     */

    hasDOMNode(editor: AngularEditor, target: DOMNode, options: { editable?: boolean } = {}): boolean {
        const { editable = false } = options;
        const editorEl = AngularEditor.toDOMNode(editor, editor);
        let targetEl;

        // COMPAT: In Firefox, reading `target.nodeType` will throw an error if
        // target is originating from an internal "restricted" element (e.g. a
        // stepper arrow on a number input). (2018/05/04)
        // https://github.com/ianstormtaylor/slate/issues/1819
        try {
            targetEl = (isDOMElement(target) ? target : target.parentElement) as HTMLElement;
        } catch (err) {
            if (!err.message.includes('Permission denied to access property "nodeType"')) {
                throw err;
            }
        }

        if (!targetEl) {
            return false;
        }

        return (
            targetEl.closest(`[data-slate-editor]`) === editorEl &&
            (!editable || targetEl.isContentEditable || !!targetEl.getAttribute('data-slate-zero-width'))
        );
    },

    /**
     * Insert data from a `DataTransfer` into the editor.
     */

    insertData(editor: AngularEditor, data: DataTransfer): void {
        editor.insertData(data);
    },

    /**
     * Insert fragment data from a `DataTransfer` into the editor.
     */

    insertFragmentData(editor: AngularEditor, data: DataTransfer): boolean {
        return editor.insertFragmentData(data);
    },

    /**
     * Insert text data from a `DataTransfer` into the editor.
     */

    insertTextData(editor: AngularEditor, data: DataTransfer): boolean {
        return editor.insertTextData(data);
    },

    /**
     * onKeydown hook.
     */
    onKeydown(editor: AngularEditor, data: KeyboardEvent): void {
        editor.onKeydown(data);
    },

    /**
     * onClick hook.
     */
    onClick(editor: AngularEditor, data: MouseEvent): void {
        editor.onClick(data);
    },

    /**
     * Sets data from the currently selected fragment on a `DataTransfer`.
     */

    setFragmentData(editor: AngularEditor, data: DataTransfer, originEvent?: 'drag' | 'copy' | 'cut'): void {
        editor.setFragmentData(data, originEvent);
    },

    deleteCutData(editor: AngularEditor): void {
        editor.deleteCutData();
    },

    /**
     * Find the native DOM element from a Slate node.
     */

    toDOMNode(editor: AngularEditor, node: Node): HTMLElement {
        const domNode = Editor.isEditor(node) ? EDITOR_TO_ELEMENT.get(editor) : NODE_TO_ELEMENT.get(node);

        if (!domNode) {
            throw new Error(`Cannot resolve a DOM node from Slate node: ${JSON.stringify(node)}`);
        }

        return domNode;
    },

    /**
     * Find a native DOM selection point from a Slate point.
     */

    toDOMPoint(editor: AngularEditor, point: Point): DOMPoint {
        const [node] = Editor.node(editor, point.path);
        const el = AngularEditor.toDOMNode(editor, node);
        let domPoint: DOMPoint | undefined;

        // block card
        const cardTargetAttr = getCardTargetAttribute(el);
        if (cardTargetAttr) {
            if (point.offset === FAKE_LEFT_BLOCK_CARD_OFFSET) {
                const cursorNode = AngularEditor.getCardCursorNode(editor, node, { direction: 'left' });
                return [cursorNode, 1];
            } else {
                const cursorNode = AngularEditor.getCardCursorNode(editor, node, { direction: 'right' });
                return [cursorNode, 1];
            }
        }

        // If we're inside a void node, force the offset to 0, otherwise the zero
        // width spacing character will result in an incorrect offset of 1
        if (Editor.void(editor, { at: point })) {
            point = { path: point.path, offset: 0 };
        }

        // For each leaf, we need to isolate its content, which means filtering
        // to its direct text and zero-width spans. (We have to filter out any
        // other siblings that may have been rendered alongside them.)
        const selector = `[data-slate-string], [data-slate-zero-width]`;
        const texts = Array.from(el.querySelectorAll(selector));
        let start = 0;

        for (const text of texts) {
            const domNode = text.childNodes[0] as HTMLElement;

            if (domNode == null || domNode.textContent == null) {
                continue;
            }

            const { length } = domNode.textContent;
            const attr = text.getAttribute('data-slate-length');
            const trueLength = attr == null ? length : parseInt(attr, 10);
            const end = start + trueLength;

            if (point.offset <= end) {
                const offset = Math.min(length, Math.max(0, point.offset - start));
                domPoint = [domNode, offset];
                // fixed cursor position after zero width char
                if (offset === 0 && length === 1 && domNode.textContent === '\uFEFF') {
                    domPoint = [domNode, offset + 1];
                }
                break;
            }

            start = end;
        }

        if (!domPoint) {
            throw new Error(`Cannot resolve a DOM point from Slate point: ${JSON.stringify(point)}`);
        }

        return domPoint;
    },

    /**
     * Find a native DOM range from a Slate `range`.
     */

    toDOMRange(editor: AngularEditor, range: Range): DOMRange {
        const { anchor, focus } = range;
        const isBackward = Range.isBackward(range);
        const domAnchor = AngularEditor.toDOMPoint(editor, anchor);
        const domFocus = Range.isCollapsed(range) ? domAnchor : AngularEditor.toDOMPoint(editor, focus);

        const window = AngularEditor.getWindow(editor);
        const domRange = window.document.createRange();
        const [startNode, startOffset] = isBackward ? domFocus : domAnchor;
        const [endNode, endOffset] = isBackward ? domAnchor : domFocus;

        // A slate Point at zero-width Leaf always has an offset of 0 but a native DOM selection at
        // zero-width node has an offset of 1 so we have to check if we are in a zero-width node and
        // adjust the offset accordingly.
        const startEl = (isDOMElement(startNode) ? startNode : startNode.parentElement) as HTMLElement;
        const isStartAtZeroWidth = !!startEl.getAttribute('data-slate-zero-width');
        const endEl = (isDOMElement(endNode) ? endNode : endNode.parentElement) as HTMLElement;
        const isEndAtZeroWidth = !!endEl.getAttribute('data-slate-zero-width');

        domRange.setStart(startNode, isStartAtZeroWidth ? 1 : startOffset);
        domRange.setEnd(endNode, isEndAtZeroWidth ? 1 : endOffset);
        return domRange;
    },

    /**
     * Find a Slate node from a native DOM `element`.
     */

    toSlateNode<T extends boolean>(
        editor: AngularEditor,
        domNode: DOMNode,
        options?: {
            suppressThrow: T;
        }
    ): T extends true ? Node | null : Node {
        const { suppressThrow } = options || { suppressThrow: false };
        let domEl = isDOMElement(domNode) ? domNode : domNode.parentElement;

        if (domEl && !domEl.hasAttribute('data-slate-node')) {
            domEl = domEl.closest(`[data-slate-node]`);
        }

        const node = domEl ? ELEMENT_TO_NODE.get(domEl as HTMLElement) : null;

        if (!node) {
            if (suppressThrow) {
                return null as T extends true ? Node | null : Node;
            }
            throw new Error(`Cannot resolve a Slate node from DOM node: ${domEl}`);
        }

        return node;
    },

    /**
     * Get the target range from a DOM `event`.
     */

    findEventRange(editor: AngularEditor, event: any): Range {
        if ('nativeEvent' in event) {
            event = event.nativeEvent;
        }

        const { clientX: x, clientY: y, target } = event;

        if (x == null || y == null) {
            throw new Error(`Cannot resolve a Slate range from a DOM event: ${event}`);
        }

        const node = AngularEditor.toSlateNode(editor, event.target, { suppressThrow: false });
        const path = AngularEditor.findPath(editor, node);

        // If the drop target is inside a void node, move it into either the
        // next or previous node, depending on which side the `x` and `y`
        // coordinates are closest to.
        if (Element.isElement(node) && Editor.isVoid(editor, node)) {
            const rect = target.getBoundingClientRect();
            const isPrev = editor.isInline(node) ? x - rect.left < rect.left + rect.width - x : y - rect.top < rect.top + rect.height - y;

            const edge = Editor.point(editor, path, {
                edge: isPrev ? 'start' : 'end'
            });
            const point = isPrev ? Editor.before(editor, edge) : Editor.after(editor, edge);

            if (point) {
                return Editor.range(editor, point);
            }
        }

        // Else resolve a range from the caret position where the drop occured.
        let domRange: DOMRange;
        const window = AngularEditor.getWindow(editor);
        const { document } = window;

        // COMPAT: In Firefox, `caretRangeFromPoint` doesn't exist. (2016/07/25)
        if (document.caretRangeFromPoint) {
            domRange = document.caretRangeFromPoint(x, y);
        } else {
            const position = (document as SafeAny).caretPositionFromPoint(x, y);

            if (position) {
                domRange = document.createRange();
                domRange.setStart(position.offsetNode, position.offset);
                domRange.setEnd(position.offsetNode, position.offset);
            }
        }

        if (!domRange) {
            throw new Error(`Cannot resolve a Slate range from a DOM event: ${event}`);
        }

        // Resolve a Slate range from the DOM range.
        const range = AngularEditor.toSlateRange(editor, domRange, { suppressThrow: false });
        return range;
    },

    isLeafInEditor(
        editor: AngularEditor,
        leafNode: DOMElement,
        options: {
            suppressThrow: boolean;
        }
    ): boolean {
        const { suppressThrow } = options;
        const textNode = leafNode.closest('[data-slate-node="text"]')!;
        const node = AngularEditor.toSlateNode(editor, textNode, { suppressThrow });
        if (node && AngularEditor.isNodeInEditor(editor, node)) {
            return true;
        } else {
            return false;
        }
    },

    /**
     * Find a Slate point from a DOM selection's `domNode` and `domOffset`.
     */

    toSlatePoint<T extends boolean>(
        editor: AngularEditor,
        domPoint: DOMPoint,
        options: {
            exactMatch?: boolean;
            suppressThrow: T;
        }
    ): T extends true ? Point | null : Point {
        const { exactMatch, suppressThrow } = options;
        const [domNode] = domPoint;
        const [nearestNode, nearestOffset] = normalizeDOMPoint(domPoint);
        let parentNode = nearestNode.parentNode as DOMElement;
        let textNode: DOMElement | null = null;
        let offset = 0;

        // block card
        const cardTargetAttr = getCardTargetAttribute(domNode);
        if (cardTargetAttr) {
            const domSelection = window.getSelection();
            const isBackward = editor.selection && Range.isBackward(editor.selection);
            const blockCardEntry = AngularEditor.toSlateCardEntry(editor, domNode) || AngularEditor.toSlateCardEntry(editor, nearestNode);
            const [, blockPath] = blockCardEntry;
            if (domSelection.isCollapsed) {
                if (isCardLeftByTargetAttr(cardTargetAttr)) {
                    return { path: blockPath, offset: -1 };
                } else {
                    return { path: blockPath, offset: -2 };
                }
            }
            // forward
            // and to the end of previous node
            if (isCardLeftByTargetAttr(cardTargetAttr) && !isBackward) {
                const endPath = blockPath[blockPath.length - 1] <= 0 ? blockPath : Path.previous(blockPath);
                return Editor.end(editor, endPath);
            }
            // to the of current node
            if ((isCardCenterByTargetAttr(cardTargetAttr) || isCardRightByTargetAttr(cardTargetAttr)) && !isBackward) {
                return Editor.end(editor, blockPath);
            }
            // backward
            // and to the start of next node
            if (isCardRightByTargetAttr(cardTargetAttr) && isBackward) {
                return Editor.start(editor, Path.next(blockPath));
            }
            // and to the start of current node
            if ((isCardCenterByTargetAttr(cardTargetAttr) || isCardLeftByTargetAttr(cardTargetAttr)) && isBackward) {
                return Editor.start(editor, blockPath);
            }
        }

        if (parentNode) {
            const voidNode = parentNode.closest('[data-slate-void="true"]');
            let leafNode = parentNode.closest('[data-slate-leaf]');
            let domNode: DOMElement | null = null;

            // Calculate how far into the text node the `nearestNode` is, so that we
            // can determine what the offset relative to the text node is.
            if (leafNode && AngularEditor.isLeafInEditor(editor, leafNode, { suppressThrow: true })) {
                textNode = leafNode.closest('[data-slate-node="text"]')!;
                const window = AngularEditor.getWindow(editor);
                const range = window.document.createRange();
                range.setStart(textNode, 0);
                range.setEnd(nearestNode, nearestOffset);
                const contents = range.cloneContents();
                const removals = [
                    ...Array.prototype.slice.call(contents.querySelectorAll('[data-slate-zero-width]')),
                    ...Array.prototype.slice.call(contents.querySelectorAll('[contenteditable=false]'))
                ];

                removals.forEach(el => {
                    el!.parentNode!.removeChild(el);
                });

                // COMPAT: Edge has a bug where Range.prototype.toString() will
                // convert \n into \r\n. The bug causes a loop when slate-react
                // attempts to reposition its cursor to match the native position. Use
                // textContent.length instead.
                // https://developer.microsoft.com/en-us/microsoft-edge/platform/issues/10291116/
                offset = contents.textContent!.length;
                domNode = textNode;
            } else if (voidNode) {
                // For void nodes, the element with the offset key will be a cousin, not an
                // ancestor, so find it by going down from the nearest void parent.
                const spacer = voidNode.querySelector('[data-slate-spacer="true"]')!;
                leafNode = spacer.firstElementChild;
                parentNode = leafNode.firstElementChild;
                textNode = spacer;
                domNode = leafNode;
                offset = domNode.textContent!.length;
            }

            // COMPAT: If the parent node is a Slate zero-width space, editor is
            // because the text node should have no characters. However, during IME
            // composition the ASCII characters will be prepended to the zero-width
            // space, so subtract 1 from the offset to account for the zero-width
            // space character.
            if (domNode && offset === domNode.textContent!.length && parentNode && parentNode.hasAttribute('data-slate-zero-width')) {
                offset--;
            }
        }

        if (!textNode) {
            if (suppressThrow) {
                return null as T extends true ? Point | null : Point;
            }
            throw new Error(`Cannot resolve a Slate point from DOM point: ${domPoint}`);
        }

        // COMPAT: If someone is clicking from one Slate editor into another,
        // the select event fires twice, once for the old editor's `element`
        // first, and then afterwards for the correct `element`. (2017/03/03)
        const slateNode = AngularEditor.toSlateNode(editor, textNode, { suppressThrow });
        if (!slateNode && suppressThrow) {
            return null as T extends true ? Point | null : Point;
        }
        const path = AngularEditor.findPath(editor, slateNode);
        return { path, offset };
    },

    /**
     * Find a Slate range from a DOM range or selection.
     */

    toSlateRange<T extends boolean>(
        editor: AngularEditor,
        domRange: DOMRange | DOMStaticRange | DOMSelection,
        options?: {
            exactMatch?: boolean;
            suppressThrow: T;
        }
    ): T extends true ? Range | null : Range {
        const { exactMatch, suppressThrow } = options || {};
        const el = isDOMSelection(domRange) ? domRange.anchorNode : domRange.startContainer;
        let anchorNode;
        let anchorOffset;
        let focusNode;
        let focusOffset;
        let isCollapsed;

        if (el) {
            if (isDOMSelection(domRange)) {
                anchorNode = domRange.anchorNode;
                anchorOffset = domRange.anchorOffset;
                focusNode = domRange.focusNode;
                focusOffset = domRange.focusOffset;
                // COMPAT: There's a bug in chrome that always returns `true` for
                // `isCollapsed` for a Selection that comes from a ShadowRoot.
                // (2020/08/08)
                // https://bugs.chromium.org/p/chromium/issues/detail?id=447523
                if (IS_CHROME && hasShadowRoot()) {
                    isCollapsed = domRange.anchorNode === domRange.focusNode && domRange.anchorOffset === domRange.focusOffset;
                } else {
                    isCollapsed = domRange.isCollapsed;
                }
            } else {
                anchorNode = domRange.startContainer;
                anchorOffset = domRange.startOffset;
                focusNode = domRange.endContainer;
                focusOffset = domRange.endOffset;
                isCollapsed = domRange.collapsed;
            }
        }

        if (anchorNode == null || focusNode == null || anchorOffset == null || focusOffset == null) {
            throw new Error(`Cannot resolve a Slate range from DOM range: ${domRange}`);
        }

        // COMPAT: Triple-clicking a word in chrome will sometimes place the focus
        // inside a `contenteditable="false"` DOM node following the word, which
        // will cause `toSlatePoint` to throw an error. (2023/03/07)
        if (
            'getAttribute' in focusNode &&
            (focusNode as HTMLElement).getAttribute('contenteditable') === 'false' &&
            (focusNode as HTMLElement).getAttribute('data-slate-void') !== 'true'
        ) {
            focusNode = anchorNode;
            focusOffset = anchorNode.textContent?.length || 0;
        }

        const anchor = AngularEditor.toSlatePoint(editor, [anchorNode, anchorOffset], { suppressThrow, exactMatch });
        if (!anchor) {
            return null as T extends true ? Range | null : Range;
        }

        const focus = isCollapsed ? anchor : AngularEditor.toSlatePoint(editor, [focusNode, focusOffset], { suppressThrow, exactMatch });
        if (!focus) {
            return null as T extends true ? Range | null : Range;
        }

        let range: Range = { anchor: anchor as Point, focus: focus as Point };
        // if the selection is a hanging range that ends in a void
        // and the DOM focus is an Element
        // (meaning that the selection ends before the element)
        // unhang the range to avoid mistakenly including the void
        if (
            Range.isExpanded(range) &&
            Range.isForward(range) &&
            isDOMElement(focusNode) &&
            Editor.void(editor, { at: range.focus, mode: 'highest' })
        ) {
            range = Editor.unhangRange(editor, range, { voids: true });
        }

        return range;
    },

    isLeafBlock(editor: AngularEditor, node: Node): boolean {
        return Element.isElement(node) && !editor.isInline(node) && Editor.hasInlines(editor, node);
    },

    isBlockCardLeftCursor(editor: AngularEditor) {
        return (
            editor.selection.anchor.offset === FAKE_LEFT_BLOCK_CARD_OFFSET && editor.selection.focus.offset === FAKE_LEFT_BLOCK_CARD_OFFSET
        );
    },

    isBlockCardRightCursor(editor: AngularEditor) {
        return (
            editor.selection.anchor.offset === FAKE_RIGHT_BLOCK_CARD_OFFSET &&
            editor.selection.focus.offset === FAKE_RIGHT_BLOCK_CARD_OFFSET
        );
    },

    getCardCursorNode(
        editor: AngularEditor,
        blockCardNode: Node,
        options: {
            direction: 'left' | 'right' | 'center';
        }
    ) {
        const blockCardElement = AngularEditor.toDOMNode(editor, blockCardNode);
        const cardCenter = blockCardElement.parentElement;
        return options.direction === 'left' ? cardCenter.previousElementSibling.firstChild : cardCenter.nextElementSibling.firstChild;
    },

    toSlateCardEntry(editor: AngularEditor, node: DOMNode): NodeEntry {
        const element = node.parentElement.closest('.slate-block-card')?.querySelector('[card-target="card-center"]').firstElementChild;
        const slateNode = AngularEditor.toSlateNode(editor, element, { suppressThrow: false });
        const path = AngularEditor.findPath(editor, slateNode);
        return [slateNode, path];
    },

    /**
     * move native selection to card-left or card-right
     * @param editor
     * @param blockCardNode
     * @param options
     */
    moveBlockCard(
        editor: AngularEditor,
        blockCardNode: Node,
        options: {
            direction: 'left' | 'right';
        }
    ) {
        const cursorNode = AngularEditor.getCardCursorNode(editor, blockCardNode, options);
        const window = AngularEditor.getWindow(editor);
        const domSelection = window.getSelection();
        domSelection.setBaseAndExtent(cursorNode, 1, cursorNode, 1);
    },

    /**
     * move slate selection to card-left or card-right
     * @param editor
     * @param path
     * @param options
     */
    moveBlockCardCursor(
        editor: AngularEditor,
        path: Path,
        options: {
            direction: 'left' | 'right';
        }
    ) {
        const cursor = {
            path,
            offset: options.direction === 'left' ? FAKE_LEFT_BLOCK_CARD_OFFSET : FAKE_RIGHT_BLOCK_CARD_OFFSET
        };
        Transforms.select(editor, { anchor: cursor, focus: cursor });
    },

    hasRange(editor: AngularEditor, range: Range): boolean {
        const { anchor, focus } = range;
        return Editor.hasPath(editor, anchor.path) && Editor.hasPath(editor, focus.path);
    }
};

worktile / slate-angular / bbef38c2-b9dd-46f4-8180-1ef56bbede3e

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