discourse/app/assets/javascripts/pretty-text/engines/discourse-markdown/html-img.js.es6

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// special handling for IMG tags on a line by themeselves
// we always have to handle it as so it is an inline
// see: https://talk.commonmark.org/t/newline-and-img-tags/2511
const REGEX = /^<img.*\\?>\s*$/i;
function rule(state, startLine, endLine) {
var nextLine, token, lineText,
pos = state.bMarks[startLine] + state.tShift[startLine],
max = state.eMarks[startLine];
// if it's indented more than 3 spaces, it should be a code block
if (state.sCount[startLine] - state.blkIndent >= 4) { return false; }
if (!state.md.options.html) { return false; }
if (state.src.charCodeAt(pos) !== 0x3C/* < */) { return false; }
let pos1 = state.src.charCodeAt(pos+1);
if (pos1 !== 73 /* I */ && pos1 !== 105 /* i */) { return false; }
lineText = state.src.slice(pos, max);
if (!REGEX.test(lineText)) {
return false;
}
let lines = [];
lines.push(lineText);
nextLine = startLine + 1;
for (; nextLine < endLine; nextLine++) {
pos = state.bMarks[nextLine] + state.tShift[nextLine];
max = state.eMarks[nextLine];
lineText = state.src.slice(pos, max);
if (lineText.trim() === "") {
break;
}
if (!REGEX.test(lineText)) {
break;
}
lines.push(lineText);
}
state.line = nextLine;
let oldParentType = state.parentType;
state.parentType = 'paragraph';
token = state.push('paragraph_open', 'p', 1);
token.map = [startLine, state.line];
token = state.push('inline', '', 0);
token.content = lines.join('\n');
token.map = [startLine, state.line];
token.children = [];
token = state.push('paragraph_close', 'p', -1);
state.parentType = oldParentType;
return true;
}
export function setup(helper) {
helper.registerPlugin(md=>{
md.block.ruler.before('html_block', 'html_img', rule, {alt: ['fence']});
});
}