Initial commit

node_modules/stylelint/lib/utils/nodeContextLookup.js

@@ -0,0 +1,35 @@
+// Too weird for Flow
+"use strict"
+
+/**
+ * Create a collection of Maps that serve to contextualize a given node.
+ * This is useful to ensure that you only compare nodes that share a certain
+ * context.
+ *
+ * All nodes are initially contextualized by their input source.
+ * From there, you can contextualize them however you want.
+ *
+ * For a usage example, see `selector-no-descending-specificity`.
+ */
+module.exports = function () {
+  const contextMap = new Map()
+
+  return {
+    getContext(node) {
+      const nodeSource = node.source.input.from
+      const baseContext = creativeGetMap(contextMap, nodeSource)
+      const subContexts = Array.from(arguments).slice(1)
+
+      return subContexts.reduce((result, context) => {
+        return creativeGetMap(result, context)
+      }, baseContext)
+    },
+  }
+}
+
+function creativeGetMap(someMap, someThing) {
+  if (!someMap.has(someThing)) {
+    someMap.set(someThing, new Map())
+  }
+  return someMap.get(someThing)
+}