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 #include "tools/gn/unique_vector.h"
  16
  17 class OutputFile;
  18 class SourceFile;
  19
  20 namespace base {
  21 class FilePath;
  22 }
  23
  24 // Writes file names to streams assuming a certain input directory and
  25 // escaping rules. This gives us a central place for managing this state.
  26 class PathOutput {
  27  public:
  28   // Controls whether writing directory names include the trailing slash.
  29   // Often we don't want the trailing slash when writing out to a command line,
  30   // especially on Windows where it's a backslash and might be interpreted as
  31   // escaping the thing following it.
  32   enum DirSlashEnding {
  33     DIR_INCLUDE_LAST_SLASH,
  34     DIR_NO_LAST_SLASH,
  35   };
  36
  37   PathOutput(const SourceDir& current_dir, const base::StringPiece& source_root,
  38              EscapingMode escaping);
  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   // Getter/setters for flags inside the escape options.
  47   bool inhibit_quoting() const { return options_.inhibit_quoting; }
  48   void set_inhibit_quoting(bool iq) { options_.inhibit_quoting = iq; }
  49   void set_escape_platform(EscapingPlatform p) { options_.platform = p; }
  50
  51   void WriteFile(std::ostream& out, const SourceFile& file) const;
  52   void WriteFile(std::ostream& out, const OutputFile& file) const;
  53   void WriteFile(std::ostream& out, const base::FilePath& file) const;
  54
  55   // Writes the given OutputFiles with spaces separating them. This will also
  56   // write an initial space before the first item.
  57   void WriteFiles(std::ostream& out,
  58                   const std::vector<OutputFile>& files) const;
  59   void WriteFiles(std::ostream& out,
  60                   const UniqueVector<OutputFile>& files) const;
  61
  62   // This variant assumes the dir ends in a trailing slash or is empty.
  63   void WriteDir(std::ostream& out,
  64                 const SourceDir& dir,
  65                 DirSlashEnding slash_ending) const;
  66
  67   void WriteDir(std::ostream& out,
  68                 const OutputFile& file,
  69                 DirSlashEnding slash_ending) const;
  70
  71   // Backend for WriteFile and WriteDir. This appends the given file or
  72   // directory string to the file.
  73   void WritePathStr(std::ostream& out, const base::StringPiece& str) const;
  74
  75  private:
  76   // Takes the given string and writes it out, appending to the inverse
  77   // current dir. This assumes leading slashes have been trimmed.
  78   void WriteSourceRelativeString(std::ostream& out,
  79                                  const base::StringPiece& str) const;
  80
  81   SourceDir current_dir_;
  82
  83   // Uses system slashes if convert_slashes_to_system_.
  84   std::string inverse_current_dir_;
  85
  86   // Since the inverse_current_dir_ depends on some of these, we don't expose
  87   // this directly to modification.
  88   EscapeOptions options_;
  89 };
  90
  91 #endif  // TOOLS_GN_PATH_OUTPUT_H_