sgauthier
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61 lines
2.0 KiB
JavaScript
61 lines
2.0 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.default = remarkStripTrailingBreaks;
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var _mdastUtilToString = _interopRequireDefault(require("mdast-util-to-string"));
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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/**
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* Removes break nodes that are at the end of a block.
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*
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* When a trailing double space or backslash is encountered at the end of a
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* markdown block, Remark will interpret the character(s) literally, as only
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* break entities followed by text qualify as breaks. A manually created MDAST,
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* however, may have such entities, and users of visual editors shouldn't see
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* these artifacts in resulting markdown.
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*/
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function remarkStripTrailingBreaks() {
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function transform(node) {
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if (node.children) {
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node.children = node.children.map((child, idx, children) => {
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/**
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* Only touch break nodes. Convert all subsequent nodes to their text
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* value and exclude the break node if no non-whitespace characters
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* are found.
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*/
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if (child.type === 'break') {
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const subsequentNodes = children.slice(idx + 1);
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/**
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* Create a small MDAST so that mdastToString can process all
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* siblings as children of one node rather than making multiple
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* calls.
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*/
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const fragment = {
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type: 'root',
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children: subsequentNodes
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};
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const subsequentText = (0, _mdastUtilToString.default)(fragment);
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return subsequentText.trim() ? child : null;
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}
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/**
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* Always return the child if not a break.
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*/
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return child;
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})
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/**
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* Because some break nodes may be excluded, we filter out the resulting
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* null values.
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*/.filter(child => child)
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/**
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* Recurse through the MDAST by transforming each individual child node.
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*/.map(transform);
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}
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return node;
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}
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return transform;
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} |