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58 lines
1.6 KiB
Plaintext
58 lines
1.6 KiB
Plaintext
import Scope from '../../scope.js';
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import type { Leaf } from './blot.js';
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import ShadowBlot from './shadow.js';
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class LeafBlot extends ShadowBlot implements Leaf {
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public static scope = Scope.INLINE_BLOT;
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/**
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* Returns the value represented by domNode if it is this Blot's type
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* No checking that domNode can represent this Blot type is required so
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* applications needing it should check externally before calling.
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*/
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public static value(_domNode: Node): any {
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return true;
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}
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/**
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* Given location represented by node and offset from DOM Selection Range,
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* return index to that location.
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*/
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public index(node: Node, offset: number): number {
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if (
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this.domNode === node ||
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this.domNode.compareDocumentPosition(node) &
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Node.DOCUMENT_POSITION_CONTAINED_BY
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) {
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return Math.min(offset, 1);
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}
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return -1;
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}
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/**
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* Given index to location within blot, return node and offset representing
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* that location, consumable by DOM Selection Range
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*/
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public position(index: number, _inclusive?: boolean): [Node, number] {
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const childNodes: Node[] = Array.from(this.parent.domNode.childNodes);
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let offset = childNodes.indexOf(this.domNode);
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if (index > 0) {
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offset += 1;
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}
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return [this.parent.domNode, offset];
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}
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/**
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* Return value represented by this blot
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* Should not change without interaction from API or
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* user change detectable by update()
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*/
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public value(): any {
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return {
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[this.statics.blotName]: this.statics.value(this.domNode) || true,
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};
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}
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}
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export default LeafBlot;
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