All files / collaborative-slate/src/sync toSlate.ts

91.66% Statements 77/84
83.33% Branches 50/60
100% Functions 3/3
96.92% Lines 63/65

Press n or j to go to the next uncovered block, b, p or k for the previous block.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 1006x 6x 6x     2992x   6x 2202x 1367x 1367x 1945x 1945x 1945x       1945x 616x 616x 616x 616x 616x 5x 5x 5x     1945x 5x 5x       5x 5x 5x     1940x 1661x 1661x 1661x 611x 611x 611x 611x 611x 611x 611x 611x 595x   1661x         1367x 48x   1319x 1319x 1319x 349x           1367x       1367x 1367x 1367x   835x 835x 835x 1502x 835x 835x         835x       6x 700x 700x 700x 700x 700x    
import {Slice} from 'json-joy/lib/json-crdt-extensions/peritext/slice/Slice';
import {SliceStacking} from 'json-joy/lib/json-crdt-extensions/peritext/slice/constants';
import {type Block, type Inline, LeafBlock, type Peritext} from 'json-joy/lib/json-crdt-extensions/peritext';
import type {SlateDescendantNode, SlateDocument, SlateElementNode, SlateTextNode} from '../types';
 
const isText = (node: SlateDescendantNode): node is SlateTextNode => typeof (node as SlateTextNode).text === 'string';
 
const blockToSlateNode = (block: Block | LeafBlock): SlateElementNode => {
  if (block instanceof LeafBlock) {
    const children: SlateDescendantNode[] = [];
    for (let iterator = block.texts0(), inline: Inline | undefined; (inline = iterator()); ) {
      const text = inline.text();
      const attr = inline.attr();
      const attrKeys = Object.keys(attr);
 
      let atomicSlice: Slice | undefined;
      let atomicTag: string | undefined;
      for (const tag of attrKeys) {
        const stack = attr[tag];
        Iif (!stack || stack.length <= 0) continue;
        const slice = stack[0].slice;
        Iif (!(slice instanceof Slice)) continue;
        if (slice.stacking === SliceStacking.Atomic) {
          atomicSlice = slice;
          atomicTag = tag;
          break;
        }
      }
      if (atomicSlice && atomicTag !== undefined) {
        const data = atomicSlice.data();
        const inlineEl: SlateElementNode = {
          type: atomicTag,
          children: [{text: ''}],
        };
        Eif (data && typeof data === 'object' && !Array.isArray(data)) Object.assign(inlineEl, data);
        children.push(inlineEl);
        continue;
      }
 
      if (!text && attrKeys.length === 0) continue;
      const textNode: SlateTextNode = {text: text || ''};
      const length = attrKeys.length;
      ATTRS: for (let i = 0; i < length; i++) {
        const tag = attrKeys[i];
        const stack = attr[tag];
        Iif (!stack || stack.length <= 0) continue ATTRS;
        const slice = stack[0].slice;
        Iif (!(slice instanceof Slice)) continue ATTRS;
        Iif (slice.stacking === SliceStacking.Atomic) continue ATTRS;
        const data = slice.data();
        if (data && typeof data === 'object' && !Array.isArray(data)) Object.assign(textNode, {[tag]: data});
        else textNode[tag] = data !== undefined ? data : true;
      }
      children.push(textNode);
    }
 
    // Slate requires text nodes around inline elements; bracket the run
    // with empty text nodes when needed.
    if (children.length === 0) {
      children.push({text: ''});
    } else {
      if (!isText(children[0])) children.unshift({text: ''});
      if (!isText(children[children.length - 1])) children.push({text: ''});
      for (let i = 1; i < children.length; i++) {
        Iif (!isText(children[i]) && !isText(children[i - 1])) {
          children.splice(i, 0, {text: ''});
          i++;
        }
      }
    }
    const node: SlateElementNode = {
      type: block.tag() + '',
      children: children as any,
    };
    const attr = block.attr();
    Eif (typeof attr === 'object') Object.assign(node, attr);
    return node;
  } else {
    const children: SlateElementNode[] = [];
    const blockChildren = block.children;
    const length = blockChildren.length;
    for (let i = 0; i < length; i++) children.push(blockToSlateNode(blockChildren[i]));
    const attr = block.attr();
    const node: SlateElementNode = {
      ...(attr && typeof attr === 'object' ? attr : {}),
      type: block.tag() + '',
      children: children.length ? children : [{text: ''}],
    };
    return node;
  }
};
 
export const toSlate = (txt: Peritext): SlateDocument => {
  txt.refresh();
  const block = txt.blocks.root;
  const node = blockToSlateNode(block);
  const content: SlateDocument = (node?.children ?? []) as SlateDocument;
  return content;
};