1// Copyright (c) 2013 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef TOOLS_GN_SCOPE_PER_FILE_PROVIDER_H_
6#define TOOLS_GN_SCOPE_PER_FILE_PROVIDER_H_
7
8#include "base/basictypes.h"
9#include "base/memory/scoped_ptr.h"
10#include "tools/gn/scope.h"
11#include "tools/gn/source_file.h"
12
13// ProgrammaticProvider for a scope to provide it with per-file built-in
14// variable support.
15class ScopePerFileProvider : public Scope::ProgrammaticProvider {
16 public:
17  // allow_target_vars allows the target-related variables to get resolved.
18  // When allow_target_vars is unset, the target-related values will be
19  // undefined to GN script.
20  ScopePerFileProvider(Scope* scope, bool allow_target_vars);
21  virtual ~ScopePerFileProvider();
22
23  // ProgrammaticProvider implementation.
24  virtual const Value* GetProgrammaticValue(
25      const base::StringPiece& ident) OVERRIDE;
26
27 private:
28  const Value* GetCurrentToolchain();
29  const Value* GetDefaultToolchain();
30  const Value* GetPythonPath();
31  const Value* GetRootBuildDir();
32  const Value* GetRootGenDir();
33  const Value* GetRootOutDir();
34  const Value* GetTargetGenDir();
35  const Value* GetTargetOutDir();
36
37  bool allow_target_vars_;
38
39  // All values are lazily created.
40  scoped_ptr<Value> current_toolchain_;
41  scoped_ptr<Value> default_toolchain_;
42  scoped_ptr<Value> python_path_;
43  scoped_ptr<Value> root_build_dir_;
44  scoped_ptr<Value> root_gen_dir_;
45  scoped_ptr<Value> root_out_dir_;
46  scoped_ptr<Value> target_gen_dir_;
47  scoped_ptr<Value> target_out_dir_;
48
49  DISALLOW_COPY_AND_ASSIGN(ScopePerFileProvider);
50};
51
52#endif  // TOOLS_GN_SCOPE_PER_FILE_PROVIDER_H_
53