Pass command line arguments onto platform apps which provide the right intent.

chrome/browser/extensions/platform_app_intent_dispatcher.cc

Index: chrome/browser/extensions/platform_app_intent_dispatcher.cc
diff --git a/chrome/browser/extensions/platform_app_intent_dispatcher.cc b/chrome/browser/extensions/platform_app_intent_dispatcher.cc
new file mode 100644
index 0000000000000000000000000000000000000000..eee86e5a7b03b20299daad8a5e94cf0b7fc1aa5f
--- /dev/null
+++ b/chrome/browser/extensions/platform_app_intent_dispatcher.cc
@@ -0,0 +1,109 @@
+// Copyright (c) 2012 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 "chrome/browser/extensions/platform_app_intent_dispatcher.h"
+
+#include "base/bind.h"
+#include "base/command_line.h"
+#include "base/file_path.h"
+#include "base/file_util.h"
+#include "base/string16.h"
+#include "base/threading/thread_restrictions.h"
+#include "base/utf_string_conversions.h"
+#include "chrome/browser/extensions/extension_host.h"
+#include "chrome/common/extensions/extension_messages.h"
+#include "chrome/common/extensions/url_pattern.h"
+#include "chrome/common/extensions/url_pattern_set.h"
+#include "content/public/browser/child_process_security_policy.h"
+#include "content/public/browser/browser_thread.h"

[James Hawkins, 2012/03/26 19:55:57]

nit: Alphabetize includes.

[benwells, 2012/03/27 04:24:12]

Done.

+#include "content/public/browser/render_process_host.h"
+#include "content/public/browser/web_intents_dispatcher.h"
+#include "content/public/common/url_constants.h"
+#include "googleurl/src/gurl.h"
+#include "net/base/mime_util.h"
+#include "net/base/net_util.h"
+#include "webkit/glue/web_intent_data.h"
+#include "webkit/glue/web_intent_service_data.h"
+
+namespace extensions {
+
+// static
+void PlatformAppIntentDispatcher::DispatchIntentData(ExtensionHost* host) {
+  scoped_refptr<PlatformAppIntentDispatcher> dispatcher =
+      new PlatformAppIntentDispatcher(host);
+  dispatcher->DoDispatchIntentData();
+}
+
+PlatformAppIntentDispatcher::PlatformAppIntentDispatcher(ExtensionHost* host)
+    : host_(host) {}
+
+void PlatformAppIntentDispatcher::DoDispatchIntentData() {
+  // See if we have a command line argument.

[James Hawkins, 2012/03/26 19:55:57]

nit: Don't use 'we' (or pronouns in general) in comments; pronouns are
ambiguous.

[benwells, 2012/03/27 04:24:12]

Done.

+  CommandLine* command_line = CommandLine::ForCurrentProcess();
+  CommandLine::StringVector args = command_line->GetArgs();
+  if (!args.size())
+    return;
+
+  FilePath file_path(args[0]);
+  std::string mime_type;
+  {
+    // TODO(benwells): Remove this ScopedAllowIO. This should be done by
+    // delaying the creation of the render view until after the MIME type has
+    // been retrieved on the FILE thread. This should be done once the platform
+    // app startup and windowing model has settled down.
+    base::ThreadRestrictions::ScopedAllowIO allow;
+
+    // Get the MIME type of the file.
+    if (!net::GetMimeTypeFromFile(file_path, &mime_type))
+      return;
+  }
+
+  // Find the intent service from the platform app for the file being opened.
+  const string16 open_action = ASCIIToUTF16("http://webintents.org/view");

[James Hawkins, 2012/03/26 19:55:57]

s/open_action/kOpenAction/ for const variable.

[benwells, 2012/03/27 04:24:12]

Done.

+  webkit_glue::WebIntentServiceData service;
+  bool found_service = false;
+
+  std::vector<webkit_glue::WebIntentServiceData> services =
+      host_->extension()->intents_services();
+  for (size_t i = 0; i < services.size(); i++) {
+    std::string service_type_ascii = UTF16ToASCII(services[i].type);
+    if (services[i].action == open_action &&
+        net::MatchesMimeType(service_type_ascii, mime_type)) {
+      service = services[i];
+      found_service = true;
+    }
+  }
+  if (!found_service)
+    return;
+
+  // Give the app permission to use the file:// scheme.
+  using content::ChildProcessSecurityPolicy;
+  ChildProcessSecurityPolicy* policy =
+      ChildProcessSecurityPolicy::GetInstance();
+  DCHECK(policy);
+  int child_id = host_->render_process_host()->GetID();
+  policy->GrantScheme(child_id, chrome::kFileScheme);
+
+  // Give the renderer permission to the given URL.
+  ExtensionAPIPermissionSet apis; // empty

[James Hawkins, 2012/03/26 19:55:57]

nit: Two spaces before start of comments.

Though I'm not sure it's necessary to document that a variable is intentionally
empty.

[benwells, 2012/03/27 04:24:12]

Done (comment removed).

+  URLPatternSet script_hosts; // empty
+  GURL file_url(net::FilePathToFileURL(file_path));
+  URLPattern file_url_pattern(URLPattern::SCHEME_FILE, file_url.spec());
+  URLPatternSet explicit_hosts;
+  explicit_hosts.AddPattern(file_url_pattern);
+  host_->render_process_host()->Send(new ExtensionMsg_UpdatePermissions(
+      static_cast<int>(UpdatedExtensionPermissionsInfo::ADDED),
+      host_->extension()->id(),

[James Hawkins, 2012/03/26 19:55:57]

Optional nit: Can save lines by moving parameters to the previous lines.

[benwells, 2012/03/27 04:24:12]

Done.

+      apis,
+      explicit_hosts,
+      script_hosts));
+
+  // Dispatch the intent data to the renderer.
+  string16 mime_type_utf16 = ASCIIToUTF16(mime_type);
+  webkit_glue::WebIntentData intent_data(open_action, mime_type_utf16,
+      ASCIIToUTF16(file_url.spec()));
+  DirectDispatchIntent(intent_data, host_->render_view_host());
+}
+
+} // namespace extensions