1 files changed, 72 insertions, 0 deletions
diff --git a/gn/src/gn/visibility.h b/gn/src/gn/visibility.h
new file mode 100644
index 00000000000..fc1673138aa
--- /dev/null
+++ b/gn/src/gn/visibility.h
@@ -0,0 +1,72 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef TOOLS_GN_VISIBILITY_H_
+#define TOOLS_GN_VISIBILITY_H_
+
+#include <memory>
+#include <string_view>
+#include <vector>
+
+#include "base/macros.h"
+#include "gn/label_pattern.h"
+#include "gn/source_dir.h"
+
+namespace base {
+class Value;
+}
+
+class Err;
+class Item;
+class Label;
+class Scope;
+class Value;
+
+class Visibility {
+ public:
+  // Defaults to private visibility (only the current file).
+  Visibility();
+  ~Visibility();
+
+  // Set the visibility to the thing specified by the given value. On failure,
+  // returns false and sets the error.
+  bool Set(const SourceDir& current_dir,
+           const std::string_view& source_root,
+           const Value& value,
+           Err* err);
+
+  // Sets the visibility to be public.
+  void SetPublic();
+
+  // Sets the visibility to be private to the given directory.
+  void SetPrivate(const SourceDir& current_dir);
+
+  // Returns true if the target with the given label can depend on one with the
+  // current visibility.
+  bool CanSeeMe(const Label& label) const;
+
+  // Returns a string listing the visibility. |indent| number of spaces will
+  // be added on the left side of the output. If |include_brackets| is set, the
+  // result will be wrapped in "[ ]" and the contents further indented. The
+  // result will end in a newline.
+  std::string Describe(int indent, bool include_brackets) const;
+
+  // Returns value representation of this visibility
+  std::unique_ptr<base::Value> AsValue() const;
+
+  // Helper function to check visibility between the given two items. If
+  // to is invisible to from, returns false and sets the error.
+  static bool CheckItemVisibility(const Item* from, const Item* to, Err* err);
+
+  // Helper function to fill an item's visibility from the "visibility" value
+  // in the current scope.
+  static bool FillItemVisibility(Item* item, Scope* scope, Err* err);
+
+ private:
+  std::vector<LabelPattern> patterns_;
+
+  DISALLOW_COPY_AND_ASSIGN(Visibility);
+};
+
+#endif  // TOOLS_GN_VISIBILITY_H_