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,
  37              EscapingMode escaping,
  38              bool convert_slashes);
  39   ~PathOutput();
  40
  41   // Read-only since inverse_current_dir_ is computed depending on this.
  42   EscapingMode escaping_mode() const { return options_.mode; }
  43
  44   const SourceDir& current_dir() const { return current_dir_; }
  45
  46   // When true, converts slashes to the system-type path separators (on
  47   // Windows, this is a backslash, this is a NOP otherwise).
  48   //
  49   // Read-only since inverse_current_dir_ is computed depending on this.
  50   bool convert_slashes_to_system() const { return options_.convert_slashes; }
  51
  52   // When the output escaping is ESCAPE_SHELL, the escaper will normally put
  53   // quotes around suspect things. If this value is set to true, we'll disable
  54   // the quoting feature. This means that in ESCAPE_SHELL mode, strings with
  55   // spaces in them qon't be quoted. This mode is for when quoting is done at
  56   // some higher-level. Defaults to false.
  57   bool inhibit_quoting() const { return options_.inhibit_quoting; }
  58   void set_inhibit_quoting(bool iq) { options_.inhibit_quoting = iq; }
  59
  60   void WriteFile(std::ostream& out, const SourceFile& file) const;
  61   void WriteFile(std::ostream& out, const OutputFile& file) const;
  62   void WriteFile(std::ostream& out, const base::FilePath& file) const;
  63   void WriteDir(std::ostream& out,
  64                 const SourceDir& dir,
  65                 DirSlashEnding slash_ending) const;
  66
  67   // Backend for WriteFile and WriteDir. This appends the given file or
  68   // directory string to the file.
  69   void WritePathStr(std::ostream& out, const base::StringPiece& str) const;
  70
  71  private:
  72   // Takes the given string and writes it out, appending to the inverse
  73   // current dir. This assumes leading slashes have been trimmed.
  74   void WriteSourceRelativeString(std::ostream& out,
  75                                  const base::StringPiece& str) const;
  76
  77   SourceDir current_dir_;
  78
  79   // Uses system slashes if convert_slashes_to_system_.
  80   std::string inverse_current_dir_;
  81
  82   // Since the inverse_current_dir_ depends on some of these, we don't expose
  83   // this directly to modification.
  84   EscapeOptions options_;
  85 };
  86
  87 #endif  // TOOLS_GN_PATH_OUTPUT_H_