74 lines
1.5 KiB
JavaScript
74 lines
1.5 KiB
JavaScript
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module.exports = toMarkdown
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var zwitch = require('zwitch')
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var configure = require('./configure')
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var defaultHandlers = require('./handle')
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var defaultJoin = require('./join')
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var defaultUnsafe = require('./unsafe')
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function toMarkdown(tree, options) {
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var settings = options || {}
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var context = {
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enter: enter,
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stack: [],
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unsafe: [],
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join: [],
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handlers: {},
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options: {}
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}
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var result
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configure(context, {
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unsafe: defaultUnsafe,
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join: defaultJoin,
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handlers: defaultHandlers
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})
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configure(context, settings)
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if (context.options.tightDefinitions) {
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context.join = [joinDefinition].concat(context.join)
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}
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context.handle = zwitch('type', {
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invalid: invalid,
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unknown: unknown,
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handlers: context.handlers
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})
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result = context.handle(tree, null, context, {before: '\n', after: '\n'})
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if (
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result &&
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result.charCodeAt(result.length - 1) !== 10 &&
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result.charCodeAt(result.length - 1) !== 13
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) {
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result += '\n'
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}
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return result
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function enter(name) {
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context.stack.push(name)
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return exit
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function exit() {
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context.stack.pop()
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}
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}
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}
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function invalid(value) {
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throw new Error('Cannot handle value `' + value + '`, expected node')
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}
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function unknown(node) {
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throw new Error('Cannot handle unknown node `' + node.type + '`')
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}
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function joinDefinition(left, right) {
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// No blank line between adjacent definitions.
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if (left.type === 'definition' && left.type === right.type) {
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return 0
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}
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}
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