tools/gn/path_output.h

   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_PATH_OUTPUT_H_
   6 #define TOOLS_GN_PATH_OUTPUT_H_
   7
   8 #include <iosfwd>
   9 #include <string>
  10
  11 #include "base/basictypes.h"
  12 #include "base/strings/string_piece.h"
  13 #include "tools/gn/escape.h"
  14 #include "tools/gn/source_dir.h"
  15
  16 class OutputFile;
  17 class SourceFile;
  18
  19 namespace base {
  20 class FilePath;
  21 }
  22
  23 // Writes file names to streams assuming a certain input directory and
  24 // escaping rules. This gives us a central place for managing this state.
  25 class PathOutput {
  26  public:
  27   // Controls whether writing directory names include the trailing slash.
  28   // Often we don't want the trailing slash when writing out to a command line,
  29   // especially on Windows where it's a backslash and might be interpreted as
  30   // escaping the thing following it.
  31   enum DirSlashEnding {
  32     DIR_INCLUDE_LAST_SLASH,
  33     DIR_NO_LAST_SLASH,
  34   };
  35
  36   PathOutput(const SourceDir& current_dir, EscapingMode escaping);
  37   ~PathOutput();
  38
  39   // Read-only since inverse_current_dir_ is computed depending on this.
  40   EscapingMode escaping_mode() const { return options_.mode; }
  41
  42   const SourceDir& current_dir() const { return current_dir_; }
  43
  44   // Getter/setters for flags inside the escape options.
  45   bool inhibit_quoting() const { return options_.inhibit_quoting; }
  46   void set_inhibit_quoting(bool iq) { options_.inhibit_quoting = iq; }
  47   void set_escape_platform(EscapingPlatform p) { options_.platform = p; }
  48
  49   void WriteFile(std::ostream& out, const SourceFile& file) const;
  50   void WriteFile(std::ostream& out, const OutputFile& file) const;
  51   void WriteFile(std::ostream& out, const base::FilePath& file) const;
  52   void WriteDir(std::ostream& out,
  53                 const SourceDir& dir,
  54                 DirSlashEnding slash_ending) const;
  55
  56   // Backend for WriteFile and WriteDir. This appends the given file or
  57   // directory string to the file.
  58   void WritePathStr(std::ostream& out, const base::StringPiece& str) const;
  59
  60  private:
  61   // Takes the given string and writes it out, appending to the inverse
  62   // current dir. This assumes leading slashes have been trimmed.
  63   void WriteSourceRelativeString(std::ostream& out,
  64                                  const base::StringPiece& str) const;
  65
  66   SourceDir current_dir_;
  67
  68   // Uses system slashes if convert_slashes_to_system_.
  69   std::string inverse_current_dir_;
  70
  71   // Since the inverse_current_dir_ depends on some of these, we don't expose
  72   // this directly to modification.
  73   EscapeOptions options_;
  74 };
  75
  76 #endif  // TOOLS_GN_PATH_OUTPUT_H_