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// Process block-level custom containers
//
export default function container_plugin (md, name, options) {
// Second param may be useful if you decide
// to increase minimal allowed marker length
function validateDefault (params/*, markup */) {
return params.trim().split(' ', 2)[0] === name
}
function renderDefault (tokens, idx, _options, env, slf) {
// add a class to the opening tag
if (tokens[idx].nesting === 1) {
tokens[idx].attrJoin('class', name)
}
return slf.renderToken(tokens, idx, _options, env, slf)
}
options = options || {}
const min_markers = 3
const marker_str = options.marker || ':'
const marker_char = marker_str.charCodeAt(0)
const marker_len = marker_str.length
const validate = options.validate || validateDefault
const render = options.render || renderDefault
function container (state, startLine, endLine, silent) {
let pos
let auto_closed = false
let start = state.bMarks[startLine] + state.tShift[startLine]
let max = state.eMarks[startLine]
// Check out the first character quickly,
// this should filter out most of non-containers
//
if (marker_char !== state.src.charCodeAt(start)) { return false }
// Check out the rest of the marker string
//
for (pos = start + 1; pos <= max; pos++) {
if (marker_str[(pos - start) % marker_len] !== state.src[pos]) {
break
}
}
const marker_count = Math.floor((pos - start) / marker_len)
if (marker_count < min_markers) { return false }
pos -= (pos - start) % marker_len
const markup = state.src.slice(start, pos)
const params = state.src.slice(pos, max)
if (!validate(params, markup)) { return false }
// Since start is found, we can report success here in validation mode
//
if (silent) { return true }
// Search for the end of the block
//
let nextLine = startLine
for (;;) {
nextLine++
if (nextLine >= endLine) {
// unclosed block should be autoclosed by end of document.
// also block seems to be autoclosed by end of parent
break
}
start = state.bMarks[nextLine] + state.tShift[nextLine]
max = state.eMarks[nextLine]
if (start < max && state.sCount[nextLine] < state.blkIndent) {
// non-empty line with negative indent should stop the list:
// - ```
// test
break
}
if (marker_char !== state.src.charCodeAt(start)) { continue }
if (state.sCount[nextLine] - state.blkIndent >= 4) {
// closing fence should be indented less than 4 spaces
continue
}
for (pos = start + 1; pos <= max; pos++) {
if (marker_str[(pos - start) % marker_len] !== state.src[pos]) {
break
}
}
// closing code fence must be at least as long as the opening one
if (Math.floor((pos - start) / marker_len) < marker_count) { continue }
// make sure tail has spaces only
pos -= (pos - start) % marker_len
pos = state.skipSpaces(pos)
if (pos < max) { continue }
// found!
auto_closed = true
break
}
const old_parent = state.parentType
const old_line_max = state.lineMax
state.parentType = 'container'
// this will prevent lazy continuations from ever going past our end marker
state.lineMax = nextLine
const token_o = state.push('container_' + name + '_open', 'div', 1)
token_o.markup = markup
token_o.block = true
token_o.info = params
token_o.map = [startLine, nextLine]
state.md.block.tokenize(state, startLine + 1, nextLine)
const token_c = state.push('container_' + name + '_close', 'div', -1)
token_c.markup = state.src.slice(start, pos)
token_c.block = true
state.parentType = old_parent
state.lineMax = old_line_max
state.line = nextLine + (auto_closed ? 1 : 0)
return true
}
md.block.ruler.before('fence', 'container_' + name, container, {
alt: ['paragraph', 'reference', 'blockquote', 'list']
})
md.renderer.rules['container_' + name + '_open'] = render
md.renderer.rules['container_' + name + '_close'] = render
};
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