Move //mojo/shell to //shell

mojo/shell/desktop/mojo_main.cc

-// 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.
-
-#include <algorithm>
-#include <iostream>
-
-#include "base/at_exit.h"
-#include "base/bind.h"
-#include "base/command_line.h"
-#include "base/logging.h"
-#include "base/message_loop/message_loop.h"
-#include "base/strings/string_split.h"
-#include "base/strings/utf_string_conversions.h"
-#include "mojo/shell/child_process.h"
-#include "mojo/shell/context.h"
-#include "mojo/shell/init.h"
-#include "mojo/shell/mojo_url_resolver.h"
-#include "mojo/shell/switches.h"
-
-namespace {
-
-#if defined(OS_LINUX)
-// Copied from ui/gfx/switches.cc to avoid a dependency on //ui/gfx
-const char kEnableHarfBuzzRenderText[] = "enable-harfbuzz-rendertext";
-#endif
-
-bool IsEmpty(const std::string& s) {
-  return s.empty();
-}
-
-// The value of app_url_and_args is "<mojo_app_url> [<args>...]", where args
-// is a list of "configuration" arguments separated by spaces. If one or more
-// arguments are specified they will be available when the Mojo application
-// is initialized. See ApplicationImpl::args().
-GURL GetAppURLAndSetArgs(const std::string& app_url_and_args,
-                         mojo::shell::Context* context) {
-  // SplitString() returns empty strings for extra delimeter characters (' ').
-  std::vector<std::string> argv;
-  base::SplitString(app_url_and_args, ' ', &argv);
-  argv.erase(std::remove_if(argv.begin(), argv.end(), IsEmpty), argv.end());
-
-  if (argv.empty())
-    return GURL::EmptyGURL();
-  GURL app_url(argv[0]);
-  if (!app_url.is_valid()) {
-    LOG(ERROR) << "Error: invalid URL: " << argv[0];
-    return app_url;
-  }
-  if (argv.size() > 1)
-    context->application_manager()->SetArgsForURL(argv, app_url);
-  return app_url;
-}
-
-void RunApps(mojo::shell::Context* context) {
-  const auto& command_line = *base::CommandLine::ForCurrentProcess();
-  for (const auto& arg : command_line.GetArgs()) {
-    std::string arg2;
-#if defined(OS_WIN)
-    arg2 = base::UTF16ToUTF8(arg);
-#else
-    arg2 = arg;
-#endif
-    GURL url = GetAppURLAndSetArgs(arg2, context);
-    if (!url.is_valid())
-      return;
-    context->Run(GetAppURLAndSetArgs(arg2, context));
-  }
-}
-
-void Usage() {
-  std::cerr << "Launch Mojo applications.\n";
-  std::cerr
-      << "Usage: mojo_shell"
-      << " [--" << switches::kArgsFor << "=<mojo-app>]"
-      << " [--" << switches::kContentHandlers << "=<handlers>]"
-      << " [--" << switches::kEnableExternalApplications << "]"
-      << " [--" << switches::kDisableCache << "]"
-      << " [--" << switches::kEnableMultiprocess << "]"
-      << " [--" << switches::kOrigin << "=<url-lib-path>]"
-      << " [--" << switches::kURLMappings << "=from1=to1,from2=to2]"
-      << " <mojo-app> ...\n\n"
-      << "A <mojo-app> is a Mojo URL or a Mojo URL and arguments within "
-      << "quotes.\n"
-      << "Example: mojo_shell \"mojo:js_standalone test.js\".\n"
-      << "<url-lib-path> is searched for shared libraries named by mojo URLs.\n"
-      << "The value of <handlers> is a comma separated list like:\n"
-      << "text/html,mojo:html_viewer,"
-      << "application/javascript,mojo:js_content_handler\n";
-}
-
-bool IsArgsFor(const std::string& arg, std::string* value) {
-  const std::string kArgsForSwitches[] = {
-    "-" + std::string(switches::kArgsFor),
-    "--" + std::string(switches::kArgsFor),
-  };
-  for (size_t i = 0; i < arraysize(kArgsForSwitches); i++) {
-    std::string argsfor_switch(kArgsForSwitches[i]);
-    if (arg.compare(0, argsfor_switch.size(), argsfor_switch) == 0) {
-      *value = arg.substr(argsfor_switch.size() + 1, std::string::npos);
-      return true;
-    }
-  }
-  return false;
-}
-
-}  // namespace
-
-int main(int argc, char** argv) {
-  base::AtExitManager at_exit;
-  base::CommandLine::Init(argc, argv);
-
-  const base::CommandLine& command_line =
-    *base::CommandLine::ForCurrentProcess();
-
-  const std::set<std::string> all_switches = switches::GetAllSwitches();
-  const base::CommandLine::SwitchMap switches = command_line.GetSwitches();
-  bool found_unknown_switch = false;
-  for (const auto& s : switches) {
-    if (all_switches.find(s.first) == all_switches.end()) {
-      std::cerr << "unknown switch: " << s.first << std::endl;
-      found_unknown_switch = true;
-    }
-  }
-
-  if (found_unknown_switch ||
-      (!command_line.HasSwitch(switches::kEnableExternalApplications) &&
-       (command_line.HasSwitch(switches::kHelp) ||
-        command_line.GetArgs().empty()))) {
-    Usage();
-    return 0;
-  }
-
-#if defined(OS_LINUX)
-  // We use gfx::RenderText from multiple threads concurrently and the pango
-  // backend (currently the default on linux) is not close to threadsafe. Force
-  // use of the harfbuzz backend for now.
-  base::CommandLine::ForCurrentProcess()->AppendSwitch(
-      kEnableHarfBuzzRenderText);
-#endif
-  mojo::shell::InitializeLogging();
-
-  // TODO(vtl): Unify parent and child process cases to the extent possible.
-  if (scoped_ptr<mojo::shell::ChildProcess> child_process =
-          mojo::shell::ChildProcess::Create(
-              *base::CommandLine::ForCurrentProcess())) {
-    child_process->Main();
-  } else {
-    // We want the shell::Context to outlive the MessageLoop so that pipes are
-    // all gracefully closed / error-out before we try to shut the Context down.
-    mojo::shell::Context shell_context;
-    {
-      base::MessageLoop message_loop;
-      if (!shell_context.Init()) {
-        Usage();
-        return 0;
-      }
-
-      // The mojo_shell --args-for command-line switch is handled specially
-      // because it can appear more than once. The base::CommandLine class
-      // collapses multiple occurrences of the same switch.
-      for (int i = 1; i < argc; i++) {
-        std::string args_for_value;
-        if (IsArgsFor(argv[i], &args_for_value))
-          GetAppURLAndSetArgs(args_for_value, &shell_context);
-      }
-
-      message_loop.PostTask(FROM_HERE, base::Bind(RunApps, &shell_context));
-      message_loop.Run();
-    }
-  }
-  return 0;
-}