Move flash clipboard to the new proxy and add custom format support

content/renderer/pepper/pepper_flash_clipboard_host.cc

+// 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 "content/renderer/pepper/pepper_flash_clipboard_host.h"
+
+#include "base/pickle.h"
+#include "base/utf_string_conversions.h"
+#include "content/public/renderer/renderer_ppapi_host.h"
+#include "content/renderer/renderer_clipboard_client.h"
+#include "ipc/ipc_message_macros.h"
+#include "ppapi/c/pp_errors.h"
+#include "ppapi/c/private/ppb_flash_clipboard.h"
+#include "ppapi/host/dispatch_host_message.h"
+#include "ppapi/host/ppapi_host.h"
+#include "ppapi/proxy/ppapi_messages.h"
+#include "ppapi/proxy/resource_message_params.h"
+#include "webkit/glue/clipboard_client.h"
+#include "webkit/glue/scoped_clipboard_writer_glue.h"
+
+namespace content {
+
+namespace {
+
+const size_t kMaxClipboardWriteSize = 1000000;
+
+ui::Clipboard::Buffer ConvertClipboardType(
+    uint32_t type) {
+  switch (type) {
+    case PP_FLASH_CLIPBOARD_TYPE_STANDARD:
+      return ui::Clipboard::BUFFER_STANDARD;
+    case PP_FLASH_CLIPBOARD_TYPE_SELECTION:
+      return ui::Clipboard::BUFFER_SELECTION;
+  }
+  NOTREACHED();
+  return ui::Clipboard::BUFFER_STANDARD;
+}
+
+// Functions to pack/unpack custom data from a pickle. See the header file for
+// more detail on custom formats in Pepper.
+// TODO(raymes): This code is very similar to the code in

[dcheng, 2012/10/29 20:26:29]

We should probably address this sooner rather than later. This code expects
valid UTF-8, while the custom data code assumes UTF-16 right? If we mix and
match, there would be a lot of unexpected results.

It'd be better if we just decided the serialization format should always be
UTF-8 or UTF-16 and convert where necessary (whether that's here or in the
ui/base/clipboard code)

[raymes, 2012/10/29 23:30:00]

I filed a bug and added a TODO. As discussed, I've used a different native
format for now.

On 2012/10/29 20:26:29, dcheng wrote:

+// ui/base/clipboard/custom_data_helper.cc except that it operates on custom
+// data represented as std::strings rather than string16s. This could be unified
+// by changing that code (and its uses) to read/write custom data as arbitrary
+// bytes rather than string16s. This would also allow interoperability between
+// the web clipboard and the pepper clipboard.
+bool JumpToFormatInPickle(const string16& format, PickleIterator* iter) {
+  uint64 size = 0;
+  if (!iter->ReadUInt64(&size))
+    return false;
+  for (uint64 i = 0; i < size; ++i) {
+    string16 stored_format;
+    if (!iter->ReadString16(&stored_format))
+      return false;
+    if (stored_format == format)
+      return true;
+    int skip_length;
+    if (!iter->ReadLength(&skip_length))
+      return false;
+    if (!iter->SkipBytes(skip_length))
+      return false;
+  }
+  return false;
+}
+
+bool IsFormatAvailableInPickle(const string16& format, const Pickle& pickle) {
+  PickleIterator iter(pickle);
+  return JumpToFormatInPickle(format, &iter);
+}
+
+std::string ReadDataFromPickle(const string16& format, const Pickle& pickle) {
+  std::string result;
+  PickleIterator iter(pickle);
+  if (!JumpToFormatInPickle(format, &iter) || !iter.ReadString(&result))
+    return "";

[dcheng, 2012/10/29 20:26:29]

std::string() is preferred over "".

[raymes, 2012/10/29 23:30:00]

Done.

+  return result;
+}
+
+bool WriteDataToPickle(const std::map<string16, std::string>& data,
+                       Pickle* pickle) {
+  pickle->WriteUInt64(data.size());
+  for (std::map<string16, std::string>::const_iterator it = data.begin();
+       it != data.end(); ++it) {
+    if (!pickle->WriteString16(it->first))
+      return false;
+    if (!pickle->WriteString(it->second))
+      return false;
+  }
+  return true;
+}
+
+}  // namespace
+
+PepperFlashClipboardHost::PepperFlashClipboardHost(
+    RendererPpapiHost* host,
+    PP_Instance instance,
+    PP_Resource resource)
+    : ResourceHost(host->GetPpapiHost(), instance, resource),
+      clipboard_client_(new RendererClipboardClient) {
+}
+
+PepperFlashClipboardHost::~PepperFlashClipboardHost() {
+}
+
+int32_t PepperFlashClipboardHost::OnResourceMessageReceived(
+    const IPC::Message& msg,
+    ppapi::host::HostMessageContext* context) {
+  IPC_BEGIN_MESSAGE_MAP(PepperFlashClipboardHost, msg)
+    PPAPI_DISPATCH_HOST_RESOURCE_CALL(
+        PpapiHostMsg_FlashClipboard_RegisterCustomFormat,
+        OnMsgRegisterCustomFormat);
+    PPAPI_DISPATCH_HOST_RESOURCE_CALL(
+        PpapiHostMsg_FlashClipboard_IsFormatAvailable,
+        OnMsgIsFormatAvailable);
+    PPAPI_DISPATCH_HOST_RESOURCE_CALL(
+        PpapiHostMsg_FlashClipboard_ReadData,
+        OnMsgReadData);
+    PPAPI_DISPATCH_HOST_RESOURCE_CALL(
+        PpapiHostMsg_FlashClipboard_WriteData,
+        OnMsgWriteData);
+  IPC_END_MESSAGE_MAP()
+  return PP_ERROR_FAILED;
+}
+
+int32_t PepperFlashClipboardHost::OnMsgRegisterCustomFormat(
+    ppapi::host::HostMessageContext* host_context,
+    const std::string& format_name) {
+  uint32_t format = custom_formats_.RegisterFormat(format_name);
+  if (format == PP_FLASH_CLIPBOARD_FORMAT_INVALID)
+    return PP_ERROR_FAILED;
+  host_context->reply_msg =
+      PpapiPluginMsg_FlashClipboard_RegisterCustomFormatReply(format);
+  return PP_OK;
+}
+
+int32_t PepperFlashClipboardHost::OnMsgIsFormatAvailable(
+    ppapi::host::HostMessageContext* host_context,
+    uint32_t clipboard_type,
+    uint32_t format) {
+  if (clipboard_type != PP_FLASH_CLIPBOARD_TYPE_STANDARD) {
+    NOTIMPLEMENTED();
+    return PP_ERROR_FAILED;
+  }
+
+  ui::Clipboard::Buffer buffer_type = ConvertClipboardType(clipboard_type);
+  bool available = false;
+  switch (format) {
+    case PP_FLASH_CLIPBOARD_FORMAT_PLAINTEXT: {
+      bool plain = clipboard_client_->IsFormatAvailable(
+          ui::Clipboard::GetPlainTextFormatType(), buffer_type);
+      bool plainw = clipboard_client_->IsFormatAvailable(
+          ui::Clipboard::GetPlainTextWFormatType(), buffer_type);
+      available = plain || plainw;
+      break;
+    }
+    case PP_FLASH_CLIPBOARD_FORMAT_HTML:
+      available = clipboard_client_->IsFormatAvailable(
+          ui::Clipboard::GetHtmlFormatType(), buffer_type);
+      break;
+    case PP_FLASH_CLIPBOARD_FORMAT_RTF:
+      available = clipboard_client_->IsFormatAvailable(
+          ui::Clipboard::GetRtfFormatType(), buffer_type);
+      break;
+    case PP_FLASH_CLIPBOARD_FORMAT_INVALID:
+      break;
+    default:
+      if (custom_formats_.IsFormatRegistered(format)) {
+        std::string format_name = custom_formats_.GetFormatName(format);
+        std::string clipboard_data;
+        clipboard_client_->ReadData(
+            ui::Clipboard::GetWebCustomDataFormatType(), &clipboard_data);
+        Pickle pickle(clipboard_data.data(), clipboard_data.size());
+        available = IsFormatAvailableInPickle(UTF8ToUTF16(format_name), pickle);
+      }
+      break;
+  }
+
+  return available ? PP_OK : PP_ERROR_FAILED;
+}
+
+int32_t PepperFlashClipboardHost::OnMsgReadData(
+    ppapi::host::HostMessageContext* host_context,
+    uint32_t clipboard_type,
+    uint32_t format) {
+  if (clipboard_type != PP_FLASH_CLIPBOARD_TYPE_STANDARD) {
+    NOTIMPLEMENTED();
+    return PP_ERROR_FAILED;
+  }
+
+  ui::Clipboard::Buffer buffer_type = ConvertClipboardType(clipboard_type);
+  std::string clipboard_string;
+  int32_t result = PP_ERROR_FAILED;
+  switch (format) {
+    case PP_FLASH_CLIPBOARD_FORMAT_PLAINTEXT: {
+      if (clipboard_client_->IsFormatAvailable(
+          ui::Clipboard::GetPlainTextWFormatType(), buffer_type)) {
+        string16 text;
+        clipboard_client_->ReadText(buffer_type, &text);
+        if (!text.empty()) {
+          result = PP_OK;
+          clipboard_string = UTF16ToUTF8(text);
+          break;
+        }
+      }
+      // If the PlainTextW format isn't available or is empty, take the
+      // ASCII text format.
+      if (clipboard_client_->IsFormatAvailable(
+          ui::Clipboard::GetPlainTextFormatType(), buffer_type)) {
+        result = PP_OK;
+        clipboard_client_->ReadAsciiText(buffer_type, &clipboard_string);
+      }
+      break;
+    }
+    case PP_FLASH_CLIPBOARD_FORMAT_HTML: {
+      if (!clipboard_client_->IsFormatAvailable(
+          ui::Clipboard::GetHtmlFormatType(), buffer_type)) {
+        break;
+      }
+
+      string16 html;
+      GURL gurl;
+      uint32 fragment_start;
+      uint32 fragment_end;
+      clipboard_client_->ReadHTML(buffer_type, &html, &gurl, &fragment_start,
+                                  &fragment_end);
+      result = PP_OK;
+      clipboard_string = UTF16ToUTF8(
+          html.substr(fragment_start, fragment_end - fragment_start));
+      break;
+    }
+    case PP_FLASH_CLIPBOARD_FORMAT_RTF: {
+      if (!clipboard_client_->IsFormatAvailable(
+          ui::Clipboard::GetRtfFormatType(), buffer_type)) {
+        break;
+      }
+      result = PP_OK;
+      clipboard_client_->ReadRTF(buffer_type, &clipboard_string);
+      break;
+    }
+    case PP_FLASH_CLIPBOARD_FORMAT_INVALID:
+      break;
+    default: {
+      if (custom_formats_.IsFormatRegistered(format)) {
+        string16 format_name = UTF8ToUTF16(
+            custom_formats_.GetFormatName(format));
+        std::string clipboard_data;
+        clipboard_client_->ReadData(
+            ui::Clipboard::GetWebCustomDataFormatType(), &clipboard_data);
+        Pickle pickle(clipboard_data.data(), clipboard_data.size());
+        if (IsFormatAvailableInPickle(format_name, pickle)) {
+          result = PP_OK;
+          clipboard_string = ReadDataFromPickle(format_name, pickle);
+        }
+      }
+      break;
+    }
+  }
+
+  if (result == PP_OK) {
+    host_context->reply_msg =
+        PpapiPluginMsg_FlashClipboard_ReadDataReply(clipboard_string);
+  }
+  return result;
+}
+
+int32_t PepperFlashClipboardHost::OnMsgWriteData(
+    ppapi::host::HostMessageContext* host_context,
+    uint32_t clipboard_type,
+    const std::vector<uint32_t>& formats,
+    const std::vector<std::string>& data) {
+  if (clipboard_type != PP_FLASH_CLIPBOARD_TYPE_STANDARD) {
+    NOTIMPLEMENTED();
+    return PP_ERROR_FAILED;
+  }
+
+  DCHECK(formats.size() == data.size());
+  // If no formats are passed in clear the clipboard.
+  if (formats.size() == 0) {
+    clipboard_client_->Clear(ConvertClipboardType(clipboard_type));
+    return PP_OK;
+  }
+
+  webkit_glue::ScopedClipboardWriterGlue scw(clipboard_client_.get());
+  std::map<string16, std::string> custom_data_map;
+  int32_t res = PP_OK;
+  for (uint32_t i = 0; i < formats.size(); ++i) {
+    if (data[i].length() > kMaxClipboardWriteSize) {
+      res = PP_ERROR_NOSPACE;
+      break;
+    }
+
+    switch (formats[i]) {
+      case PP_FLASH_CLIPBOARD_FORMAT_PLAINTEXT:
+        scw.WriteText(UTF8ToUTF16(data[i]));
+        break;
+      case PP_FLASH_CLIPBOARD_FORMAT_HTML:
+        scw.WriteHTML(UTF8ToUTF16(data[i]), "");
+        break;
+      case PP_FLASH_CLIPBOARD_FORMAT_RTF:
+        scw.WriteRTF(data[i]);
+        break;
+      case PP_FLASH_CLIPBOARD_FORMAT_INVALID:
+        res = PP_ERROR_BADARGUMENT;
+        break;
+      default:
+        if (custom_formats_.IsFormatRegistered(formats[i])) {
+          std::string format_name = custom_formats_.GetFormatName(formats[i]);
+          custom_data_map[UTF8ToUTF16(format_name)] = data[i];
+        } else {
+          // Invalid format.
+          res = PP_ERROR_BADARGUMENT;
+          break;
+        }
+    }
+
+    if (res != PP_OK)
+      break;
+  }
+
+  if (custom_data_map.size() > 0) {
+    Pickle pickle;
+    if (WriteDataToPickle(custom_data_map, &pickle)) {
+      scw.WritePickledData(pickle,
+                           ui::Clipboard::GetWebCustomDataFormatType());
+    } else {
+      res = PP_ERROR_BADARGUMENT;
+    }
+  }
+
+  if (res != PP_OK) {
+    // Need to clear the objects so nothing is written.
+    scw.Reset();
+  }
+
+  return res;
+}
+
+}  // namespace content
+