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#!/usr/bin/env python
# Copyright 2013 The Chromium Authors
# 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_
"""
try:
from StringIO import StringIO # for Python 2
except ImportError:
from io import StringIO # for Python 3
import optparse
import os
import collections
import re
import sys
def GetConstantName(name):
"""Determine name of static constructor function from platform name.
We just capitalize the platform name and prepend "CreateOzonePlatform".
"""
return 'kPlatform' + name.capitalize()
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 = getattr(sys.stdout, 'buffer', sys.stdout)
out_h = getattr(sys.stdout, 'buffer', sys.stdout)
out_txt = getattr(sys.stdout, 'buffer', 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')
out_txt_str = StringIO()
out_h_str = StringIO()
out_cc_str = StringIO()
GeneratePlatformListText(out_txt_str, platforms)
out_txt.write(out_txt_str.getvalue().encode('utf-8'))
GeneratePlatformListHeader(out_h_str, platforms)
out_h.write(out_h_str.getvalue().encode('utf-8'))
GeneratePlatformListSource(out_cc_str, platforms)
out_cc.write(out_cc_str.getvalue().encode('utf-8'))
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:]))
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