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
  53   // Writes the given OutputFiles with spaces separating them. This will also
  54   // write an initial space before the first item.
  55   void WriteFiles(std::ostream& out,
  56                   const std::vector<OutputFile>& files) const;
  57
  58   // This variant assumes the dir ends in a trailing slash or is empty.
  59   void WriteDir(std::ostream& out,
  60                 const SourceDir& dir,
  61                 DirSlashEnding slash_ending) const;
  62
  63   void WriteDir(std::ostream& out,
  64                 const OutputFile& file,
  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_