Ozone integration.

ui/ozone/generate_ozone_platform_list.py

Index: ui/ozone/generate_ozone_platform_list.py
diff --git a/ui/ozone/generate_ozone_platform_list.py b/ui/ozone/generate_ozone_platform_list.py
new file mode 100755
index 0000000000000000000000000000000000000000..d47c398259b97243d700df86ad4ddd88bf998387
--- /dev/null
+++ b/ui/ozone/generate_ozone_platform_list.py
@@ -0,0 +1,177 @@
+#!/usr/bin/env python
+# Copyright 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.
+
+"""Code generator for Ozone platform list.
+
+This script takes as arguments a list of platform names and generates a C++
+source file containing a list of those platforms.
+
+Each platform gets an integer identifier that is used to find objects for that
+platform (particularly constructors for platform-specific objects).
+
+Example Output: ./generate_ozone_platform_list.py --default wayland dri wayland
+
+  // platform_list.txt
+
+  wayland
+  dri
+
+  // platform_list.h
+
+  #ifndef UI_OZONE_PLATFORM_LIST_H_
+  #define UI_OZONE_PLATFORM_LIST_H_
+
+  namespace ui {
+
+  const int kPlatformWayland = 0;
+  const int kPlatformDri = 1;
+
+  extern const char *kPlatformNames[kPlatformCount];
+
+  }  // namespace ui
+
+  // platform_list.cc
+
+  #include "ui/ozone/platform_list.h"
+
+  namespace ui {
+
+  const char *kPlatformNames[] = {
+   "wayland", // kPlatformWayland
+   "dri", // kPlatformDri
+  };
+
+  }  // namespace ui
+
+  #endif  // UI_OZONE_PLATFORM_LIST_H_
+
+"""
+
+import optparse
+import os
+import collections
+import re
+import sys
+import string
+
+
+def GetConstantName(name):
+  """Determine name of static constructor function from platform name.
+
+  We just capitalize the platform name and prepend "CreateOzonePlatform".
+  """
+
+  return 'kPlatform' + string.capitalize(name)
+
+
+def GeneratePlatformListText(out, platforms):
+  """Generate text file with list of platform names, in platform id order."""
+
+  for platform in platforms:
+    out.write(platform)
+    out.write('\n')
+
+  out.write('\n')
+
+
+def GeneratePlatformListHeader(out, platforms):
+  """Generate ids of ozone platforms & declaration of static names array."""
+
+  out.write('// DO NOT MODIFY. GENERATED BY generate_ozone_platform_list.py\n')
+  out.write('\n')
+
+  out.write('#ifndef UI_OZONE_PLATFORM_LIST_H_\n')
+  out.write('#define UI_OZONE_PLATFORM_LIST_H_\n')
+  out.write('\n')
+
+  out.write('namespace ui {\n')
+  out.write('\n')
+
+  # Prototypes for platform initializers.
+  for plat_id, plat_name in enumerate(platforms):
+    out.write('const int %s = %d;\n' % (GetConstantName(plat_name), plat_id))
+  out.write('\n')
+
+  # Platform count.
+  out.write('const int kPlatformCount = %d;\n' % len(platforms))
+  out.write('\n')
+
+  # Declaration for names list.
+  out.write('extern const char* kPlatformNames[kPlatformCount];\n')
+  out.write('\n')
+
+  out.write('}  // namespace ui\n')
+  out.write('\n')
+
+  out.write('#endif  // UI_OZONE_PLATFORM_LIST_H_\n')
+  out.write('\n')
+
+
+def GeneratePlatformListSource(out, platforms):
+  """Generate static array containing a list of ozone platforms."""
+
+  out.write('// DO NOT MODIFY. GENERATED BY generate_ozone_platform_list.py\n')
+  out.write('\n')
+
+  out.write('#include "ui/ozone/platform_list.h"\n')
+  out.write('\n')
+
+  out.write('namespace ui {\n')
+  out.write('\n')
+
+  # Definition of names list.
+  out.write('const char* kPlatformNames[] = {\n')
+
+  # Prototypes for platform initializers.
+  for plat_name in platforms:
+    out.write('    "%s",  // %s\n' % (plat_name, GetConstantName(plat_name)))
+  out.write('};\n')
+  out.write('\n')
+
+  out.write('}  // namespace ui\n')
+  out.write('\n')
+
+
+def main(argv):
+  parser = optparse.OptionParser()
+  parser.add_option('--output_cc')
+  parser.add_option('--output_h')
+  parser.add_option('--output_txt')
+  parser.add_option('--default')
+  options, platforms = parser.parse_args(argv)
+
+  # Reorder the platforms when --default is specified.
+  # The default platform must appear first in the platform list.
+  if options.default and options.default in platforms:
+    platforms.remove(options.default)
+    platforms.insert(0, options.default)
+
+  # Write to standard output or file specified by --output_{cc,h}.
+  out_cc = sys.stdout
+  out_h = sys.stdout
+  out_txt = sys.stdout
+  if options.output_cc:
+    out_cc = open(options.output_cc, 'wb')
+  if options.output_h:
+    out_h = open(options.output_h, 'wb')
+  if options.output_txt:
+    out_txt = open(options.output_txt, 'wb')
+
+  GeneratePlatformListText(out_txt, platforms)
+  GeneratePlatformListHeader(out_h, platforms)
+  GeneratePlatformListSource(out_cc, platforms)
+
+  if options.output_cc:
+    out_cc.close()
+  if options.output_h:
+    out_h.close()
+  if options.output_txt:
+    out_txt.close()
+
+  return 0
+
+
+if __name__ == '__main__':
+  sys.exit(main(sys.argv[1:]))