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// Copyright (c) 2013 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_SCOPE_PER_FILE_PROVIDER_H_
#define TOOLS_GN_SCOPE_PER_FILE_PROVIDER_H_
#include "base/basictypes.h"
#include "base/memory/scoped_ptr.h"
#include "tools/gn/scope.h"
#include "tools/gn/source_file.h"
// ProgrammaticProvider for a scope to provide it with per-file built-in
// variable support.
class ScopePerFileProvider : public Scope::ProgrammaticProvider {
public:
ScopePerFileProvider(Scope* scope, const SourceFile& source_file);
virtual ~ScopePerFileProvider();
// ProgrammaticProvider implementation.
virtual const Value* GetProgrammaticValue(
const base::StringPiece& ident) OVERRIDE;
// Returns the value to expose to script for the given thing. These values
// are acually set globally, but are put here so we can keep all logic
// for converting paths to built-in values in this one file.
static Value GetRootOutputDir(const Settings* settings);
static Value GetRootGenDir(const Settings* settings);
// Variable names. These two should be set globally independent of the file
// being processed.
static const char* kRootOutputDirName;
static const char* kRootGenDirName;
// Variable names. These are provided by this class as needed.
static const char* kDefaultToolchain;
static const char* kPythonPath;
static const char* kToolchain;
static const char* kTargetOutputDirName;
static const char* kTargetGenDirName;
static const char* kRelativeRootOutputDirName;
static const char* kRelativeRootGenDirName;
static const char* kRelativeTargetOutputDirName;
static const char* kRelativeTargetGenDirName;
private:
const Value* GetDefaultToolchain();
const Value* GetPythonPath();
const Value* GetToolchain();
const Value* GetTargetOutputDir();
const Value* GetTargetGenDir();
const Value* GetRelativeRootOutputDir();
const Value* GetRelativeRootGenDir();
const Value* GetRelativeTargetOutputDir();
const Value* GetRelativeTargetGenDir();
static std::string GetRootOutputDirWithNoLastSlash(const Settings* settings);
static std::string GetRootGenDirWithNoLastSlash(const Settings* settings);
std::string GetFileDirWithNoLastSlash() const;
std::string GetRelativeRootWithNoLastSlash() const;
SourceFile source_file_;
// All values are lazily created.
scoped_ptr<Value> default_toolchain_;
scoped_ptr<Value> python_path_;
scoped_ptr<Value> toolchain_;
scoped_ptr<Value> target_output_dir_;
scoped_ptr<Value> target_gen_dir_;
scoped_ptr<Value> relative_root_output_dir_;
scoped_ptr<Value> relative_root_gen_dir_;
scoped_ptr<Value> relative_target_output_dir_;
scoped_ptr<Value> relative_target_gen_dir_;
DISALLOW_COPY_AND_ASSIGN(ScopePerFileProvider);
};
#endif // TOOLS_GN_SCOPE_PER_FILE_PROVIDER_H_
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