Pepper/Flapper: Add very basic clipboard support.

Note that this is a trusted private interface; we rely on Flash to do a user
action check.

BUG=none
TEST=Trung can cut-and-paste in his Flapper

Review URL: http://codereview.chromium.org/6611034

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@76857 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 102 insertions, 0 deletions

diff --git a/webkit/plugins/ppapi/ppb_flash_clipboard_impl.cc b/webkit/plugins/ppapi/ppb_flash_clipboard_impl.cc
new file mode 100644
index 0000000..630a897
--- /dev/null
+++ b/webkit/plugins/ppapi/ppb_flash_clipboard_impl.cc
@@ -0,0 +1,102 @@
+// Copyright (c) 2011 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 "webkit/plugins/ppapi/ppb_flash_clipboard_impl.h"
+
+#include <algorithm>
+#include <string>
+
+#include "base/logging.h"
+#include "base/ref_counted.h"
+#include "ppapi/c/pp_errors.h"
+#include "ppapi/c/private/ppb_flash_clipboard.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebClipboard.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebCString.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebKit.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebKitClient.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebString.h"
+#include "webkit/plugins/ppapi/ppapi_plugin_instance.h"
+#include "webkit/plugins/ppapi/resource_tracker.h"
+#include "webkit/plugins/ppapi/var.h"
+
+namespace webkit {
+namespace ppapi {
+
+namespace {
+
+const size_t kMaxClipboardWriteSize = 1000000;
+
+WebKit::WebClipboard::Buffer ConvertClipboardType(
+    PP_Flash_Clipboard_Type type) {
+  switch (type) {
+    case PP_FLASH_CLIPBOARD_TYPE_STANDARD:
+      return WebKit::WebClipboard::BufferStandard;
+    case PP_FLASH_CLIPBOARD_TYPE_SELECTION:
+      return WebKit::WebClipboard::BufferSelection;
+    case PP_FLASH_CLIPBOARD_TYPE_DRAG:
+      return WebKit::WebClipboard::BufferDrag;
+    default:
+      NOTREACHED();
+      return WebKit::WebClipboard::BufferStandard;
+  }
+}
+
+PP_Var ReadPlainText(PP_Instance instance_id,
+                     PP_Flash_Clipboard_Type clipboard_type) {
+  PluginInstance* instance = ResourceTracker::Get()->GetInstance(instance_id);
+  if (!instance)
+    return PP_MakeNull();
+
+  WebKit::WebClipboard* web_clipboard = WebKit::webKitClient()->clipboard();
+  if (!web_clipboard) {
+    NOTREACHED();
+    return PP_MakeNull();
+  }
+
+  WebKit::WebCString s =
+      web_clipboard->readPlainText(ConvertClipboardType(clipboard_type)).utf8();
+  return StringVar::StringToPPVar(instance->module(), s);
+}
+
+int32_t WritePlainText(PP_Instance instance_id,
+                       PP_Flash_Clipboard_Type clipboard_type,
+                       PP_Var text) {
+  scoped_refptr<StringVar> text_string(StringVar::FromPPVar(text));
+  if (!text_string)
+    return PP_ERROR_BADARGUMENT;
+
+  if (text_string->value().length() > kMaxClipboardWriteSize)
+    return PP_ERROR_NOSPACE;
+
+  if (clipboard_type != PP_FLASH_CLIPBOARD_TYPE_STANDARD) {
+    NOTIMPLEMENTED();
+    return PP_ERROR_FAILED;
+  }
+
+  WebKit::WebClipboard* web_clipboard = WebKit::webKitClient()->clipboard();
+  if (!web_clipboard) {
+    NOTREACHED();
+    return PP_ERROR_FAILED;
+  }
+
+  web_clipboard->writePlainText(
+      WebKit::WebCString(text_string->value()).utf16());
+  return PP_OK;
+}
+
+const PPB_Flash_Clipboard ppb_flash_clipboard = {
+  &ReadPlainText,
+  &WritePlainText,
+};
+
+}  // namespace
+
+// static
+const PPB_Flash_Clipboard*
+    PPB_Flash_Clipboard_Impl::GetInterface() {
+  return &ppb_flash_clipboard;
+}
+
+}  // namespace ppapi
+}  // namespace webkit