122 lines
4 KiB
JavaScript
122 lines
4 KiB
JavaScript
import { anchorIsValid } from '../doc/anchors.js';
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import { isPair, isAlias, isNode, isScalar, isCollection } from '../nodes/Node.js';
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import { stringifyComment } from './stringifyComment.js';
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import { stringifyString } from './stringifyString.js';
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function createStringifyContext(doc, options) {
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const opt = Object.assign({
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blockQuote: true,
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commentString: stringifyComment,
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defaultKeyType: null,
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defaultStringType: 'PLAIN',
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directives: null,
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doubleQuotedAsJSON: false,
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doubleQuotedMinMultiLineLength: 40,
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falseStr: 'false',
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indentSeq: true,
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lineWidth: 80,
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minContentWidth: 20,
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nullStr: 'null',
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simpleKeys: false,
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singleQuote: null,
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trueStr: 'true',
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verifyAliasOrder: true
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}, doc.schema.toStringOptions, options);
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let inFlow;
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switch (opt.collectionStyle) {
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case 'block':
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inFlow = false;
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break;
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case 'flow':
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inFlow = true;
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break;
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default:
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inFlow = null;
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}
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return {
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anchors: new Set(),
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doc,
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indent: '',
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indentStep: typeof opt.indent === 'number' ? ' '.repeat(opt.indent) : ' ',
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inFlow,
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options: opt
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};
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}
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function getTagObject(tags, item) {
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if (item.tag) {
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const match = tags.filter(t => t.tag === item.tag);
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if (match.length > 0)
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return match.find(t => t.format === item.format) ?? match[0];
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}
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let tagObj = undefined;
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let obj;
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if (isScalar(item)) {
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obj = item.value;
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const match = tags.filter(t => t.identify?.(obj));
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tagObj =
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match.find(t => t.format === item.format) ?? match.find(t => !t.format);
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}
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else {
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obj = item;
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tagObj = tags.find(t => t.nodeClass && obj instanceof t.nodeClass);
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}
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if (!tagObj) {
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const name = obj?.constructor?.name ?? typeof obj;
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throw new Error(`Tag not resolved for ${name} value`);
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}
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return tagObj;
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}
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// needs to be called before value stringifier to allow for circular anchor refs
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function stringifyProps(node, tagObj, { anchors, doc }) {
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if (!doc.directives)
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return '';
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const props = [];
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const anchor = (isScalar(node) || isCollection(node)) && node.anchor;
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if (anchor && anchorIsValid(anchor)) {
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anchors.add(anchor);
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props.push(`&${anchor}`);
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}
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const tag = node.tag ? node.tag : tagObj.default ? null : tagObj.tag;
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if (tag)
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props.push(doc.directives.tagString(tag));
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return props.join(' ');
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}
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function stringify(item, ctx, onComment, onChompKeep) {
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if (isPair(item))
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return item.toString(ctx, onComment, onChompKeep);
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if (isAlias(item)) {
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if (ctx.doc.directives)
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return item.toString(ctx);
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if (ctx.resolvedAliases?.has(item)) {
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throw new TypeError(`Cannot stringify circular structure without alias nodes`);
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}
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else {
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if (ctx.resolvedAliases)
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ctx.resolvedAliases.add(item);
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else
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ctx.resolvedAliases = new Set([item]);
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item = item.resolve(ctx.doc);
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}
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}
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let tagObj = undefined;
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const node = isNode(item)
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? item
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: ctx.doc.createNode(item, { onTagObj: o => (tagObj = o) });
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if (!tagObj)
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tagObj = getTagObject(ctx.doc.schema.tags, node);
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const props = stringifyProps(node, tagObj, ctx);
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if (props.length > 0)
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ctx.indentAtStart = (ctx.indentAtStart ?? 0) + props.length + 1;
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const str = typeof tagObj.stringify === 'function'
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? tagObj.stringify(node, ctx, onComment, onChompKeep)
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: isScalar(node)
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? stringifyString(node, ctx, onComment, onChompKeep)
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: node.toString(ctx, onComment, onChompKeep);
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if (!props)
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return str;
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return isScalar(node) || str[0] === '{' || str[0] === '['
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? `${props} ${str}`
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: `${props}\n${ctx.indent}${str}`;
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}
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export { createStringifyContext, stringify };
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