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import { defaults, repeat } from 'lodash';
const DEFAULTS = {
subListIndentSpaces: 4,
};
const countIndentSpaces = text => {
const matches = text.match(/^\s+/m);
return matches ? matches[0].length : 0;
};
const buildHTMLToMarkdownRender = (baseRenderer, formattingPreferences = {}) => {
const { subListIndentSpaces } = defaults(formattingPreferences, DEFAULTS);
// eslint-disable-next-line @gitlab/require-i18n-strings
const sublistNode = 'LI OL, LI UL';
return {
TEXT_NODE(node) {
return baseRenderer.getSpaceControlled(
baseRenderer.trim(baseRenderer.getSpaceCollapsedText(node.nodeValue)),
node,
);
},
/*
* This converter overwrites the default indented list converter
* to allow us to parameterize the number of indent spaces for
* sublists.
*
* See the original implementation in
* https://github.com/nhn/tui.editor/blob/master/libs/to-mark/src/renderer.basic.js#L161
*/
[sublistNode](node, subContent) {
const baseResult = baseRenderer.convert(node, subContent);
// Default to 1 to prevent possible divide by 0
const firstLevelIndentSpacesCount = countIndentSpaces(baseResult) || 1;
const reindentedList = baseResult
.split('\n')
.map(line => {
const itemIndentSpacesCount = countIndentSpaces(line);
const nestingLevel = Math.ceil(itemIndentSpacesCount / firstLevelIndentSpacesCount);
const indentSpaces = repeat(' ', subListIndentSpaces * nestingLevel);
return line.replace(/^ +/, indentSpaces);
})
.join('\n');
return reindentedList;
},
};
};
export default buildHTMLToMarkdownRender;
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