planning

node_modules/unist-util-stringify-position/index.js

@@ -0,0 +1,50 @@
+'use strict'
+
+var own = {}.hasOwnProperty
+
+module.exports = stringify
+
+function stringify(value) {
+  // Nothing.
+  if (!value || typeof value !== 'object') {
+    return ''
+  }
+
+  // Node.
+  if (own.call(value, 'position') || own.call(value, 'type')) {
+    return position(value.position)
+  }
+
+  // Position.
+  if (own.call(value, 'start') || own.call(value, 'end')) {
+    return position(value)
+  }
+
+  // Point.
+  if (own.call(value, 'line') || own.call(value, 'column')) {
+    return point(value)
+  }
+
+  // ?
+  return ''
+}
+
+function point(point) {
+  if (!point || typeof point !== 'object') {
+    point = {}
+  }
+
+  return index(point.line) + ':' + index(point.column)
+}
+
+function position(pos) {
+  if (!pos || typeof pos !== 'object') {
+    pos = {}
+  }
+
+  return point(pos.start) + '-' + point(pos.end)
+}
+
+function index(value) {
+  return value && typeof value === 'number' ? value : 1
+}