planning

node_modules/micromark/dist/util/normalize-uri.js

@@ -0,0 +1,62 @@
+'use strict'
+
+var asciiAlphanumeric = require('../character/ascii-alphanumeric.js')
+var fromCharCode = require('../constant/from-char-code.js')
+
+// encoded sequences.
+
+function normalizeUri(value) {
+  var index = -1
+  var result = []
+  var start = 0
+  var skip = 0
+  var code
+  var next
+  var replace
+
+  while (++index < value.length) {
+    code = value.charCodeAt(index) // A correct percent encoded value.
+
+    if (
+      code === 37 &&
+      asciiAlphanumeric(value.charCodeAt(index + 1)) &&
+      asciiAlphanumeric(value.charCodeAt(index + 2))
+    ) {
+      skip = 2
+    } // ASCII.
+    else if (code < 128) {
+      if (!/[!#$&-;=?-Z_a-z~]/.test(fromCharCode(code))) {
+        replace = fromCharCode(code)
+      }
+    } // Astral.
+    else if (code > 55295 && code < 57344) {
+      next = value.charCodeAt(index + 1) // A correct surrogate pair.
+
+      if (code < 56320 && next > 56319 && next < 57344) {
+        replace = fromCharCode(code, next)
+        skip = 1
+      } // Lone surrogate.
+      else {
+        replace = '\uFFFD'
+      }
+    } // Unicode.
+    else {
+      replace = fromCharCode(code)
+    }
+
+    if (replace) {
+      result.push(value.slice(start, index), encodeURIComponent(replace))
+      start = index + skip + 1
+      replace = undefined
+    }
+
+    if (skip) {
+      index += skip
+      skip = 0
+    }
+  }
+
+  return result.join('') + value.slice(start)
+}
+
+module.exports = normalizeUri