Move clipboard-related webkit_glue embedder functions into a ClipboardClient interface.

content/renderer/renderer_clipboard_client.cc

+// 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.
+
+// This file provides the embedder's side of random webkit glue functions.
+
+#include "content/renderer/renderer_clipboard_client.h"
+
+#include "build/build_config.h"
+
+#include <string>
+#include <vector>
+
+#include "base/shared_memory.h"
+#include "base/string16.h"
+#include "content/common/clipboard_messages.h"
+#include "content/public/renderer/content_renderer_client.h"
+#include "content/renderer/render_thread_impl.h"
+#include "ui/base/clipboard/clipboard.h"
+#include "ui/gfx/size.h"
+#include "webkit/glue/scoped_clipboard_writer_glue.h"
+
+namespace {
+
+class RendererClipboardWriteContext :
+    public webkit_glue::ClipboardClient::WriteContext {
+ public:
+  RendererClipboardWriteContext();
+  virtual ~RendererClipboardWriteContext();
+  virtual void WriteBitmapFromPixels(ui::Clipboard::ObjectMap* objects,
+                                     const void* pixels,
+                                     const gfx::Size& size);
+  virtual void FlushAndDestroy(const ui::Clipboard::ObjectMap& objects);
+
+ private:
+  scoped_ptr<base::SharedMemory> shared_buf_;
+  DISALLOW_COPY_AND_ASSIGN(RendererClipboardWriteContext);
+};
+
+RendererClipboardWriteContext::RendererClipboardWriteContext() {
+}
+
+RendererClipboardWriteContext::~RendererClipboardWriteContext() {
+}
+
+// This definition of WriteBitmapFromPixels uses shared memory to communicate
+// across processes.
+void RendererClipboardWriteContext::WriteBitmapFromPixels(
+    ui::Clipboard::ObjectMap* objects,
+    const void* pixels,
+    const gfx::Size& size) {
+  // Do not try to write a bitmap more than once
+  if (shared_buf_.get())
+    return;
+
+  uint32 buf_size = 4 * size.width() * size.height();
+
+  // Allocate a shared memory buffer to hold the bitmap bits.
+  shared_buf_.reset(ChildThread::current()->AllocateSharedMemory(buf_size));
+  if (!shared_buf_.get())
+    return;
+
+  // Copy the bits into shared memory
+  DCHECK(shared_buf_->memory());
+  memcpy(shared_buf_->memory(), pixels, buf_size);
+  shared_buf_->Unmap();
+
+  ui::Clipboard::ObjectMapParam size_param;
+  const char* size_data = reinterpret_cast<const char*>(&size);
+  for (size_t i = 0; i < sizeof(gfx::Size); ++i)
+    size_param.push_back(size_data[i]);
+
+  ui::Clipboard::ObjectMapParams params;
+
+  // The first parameter is replaced on the receiving end with a pointer to
+  // a shared memory object containing the bitmap. We reserve space for it here.
+  ui::Clipboard::ObjectMapParam place_holder_param;
+  params.push_back(place_holder_param);
+  params.push_back(size_param);
+  (*objects)[ui::Clipboard::CBF_SMBITMAP] = params;
+}
+
+// Define a destructor that makes IPCs to flush the contents to the
+// system clipboard.
+void RendererClipboardWriteContext::FlushAndDestroy(
+    const ui::Clipboard::ObjectMap& objects) {
+  scoped_ptr<RendererClipboardWriteContext> delete_on_return(this);
+  if (objects.empty())
+    return;
+
+  if (shared_buf_.get()) {
+    RenderThreadImpl::current()->Send(
+        new ClipboardHostMsg_WriteObjectsSync(objects, shared_buf_->handle()));
+  } else {
+    RenderThreadImpl::current()->Send(
+        new ClipboardHostMsg_WriteObjectsAsync(objects));
+  }
+}
+
+}  // anonymous namespace
+
+RendererClipboardClient::RendererClipboardClient() {
+}
+
+RendererClipboardClient::~RendererClipboardClient() {
+}
+
+ui::Clipboard* RendererClipboardClient::GetClipboard() {
+  return NULL;
+}
+
+uint64 RendererClipboardClient::GetSequenceNumber(
+    ui::Clipboard::Buffer buffer) {
+  uint64 sequence_number = 0;
+  RenderThreadImpl::current()->Send(
+      new ClipboardHostMsg_GetSequenceNumber(buffer,
+                                             &sequence_number));
+  return sequence_number;
+}
+
+bool RendererClipboardClient::IsFormatAvailable(
+    const ui::Clipboard::FormatType& format,
+    ui::Clipboard::Buffer buffer) {
+  bool result;
+  RenderThreadImpl::current()->Send(
+      new ClipboardHostMsg_IsFormatAvailable(format, buffer, &result));
+  return result;
+}
+
+void RendererClipboardClient::ReadAvailableTypes(
+    ui::Clipboard::Buffer buffer,
+    std::vector<string16>* types,
+    bool* contains_filenames) {
+  RenderThreadImpl::current()->Send(new ClipboardHostMsg_ReadAvailableTypes(
+      buffer, types, contains_filenames));
+}
+
+void RendererClipboardClient::ReadText(ui::Clipboard::Buffer buffer,
+                                       string16* result) {
+  RenderThreadImpl::current()->Send(
+      new ClipboardHostMsg_ReadText(buffer, result));
+}
+
+void RendererClipboardClient::ReadAsciiText(ui::Clipboard::Buffer buffer,
+                                            std::string* result) {
+  RenderThreadImpl::current()->Send(
+      new ClipboardHostMsg_ReadAsciiText(buffer, result));
+}
+
+void RendererClipboardClient::ReadHTML(ui::Clipboard::Buffer buffer,
+                                       string16* markup,
+                                       GURL* url, uint32* fragment_start,
+                                       uint32* fragment_end) {
+  RenderThreadImpl::current()->Send(
+      new ClipboardHostMsg_ReadHTML(buffer, markup, url, fragment_start,
+                                    fragment_end));
+}
+
+void RendererClipboardClient::ReadImage(ui::Clipboard::Buffer buffer,
+                                        std::string* data) {
+  base::SharedMemoryHandle image_handle;
+  uint32 image_size;
+  RenderThreadImpl::current()->Send(
+      new ClipboardHostMsg_ReadImage(buffer, &image_handle, &image_size));
+  if (base::SharedMemory::IsHandleValid(image_handle)) {
+    base::SharedMemory buffer(image_handle, true);
+    buffer.Map(image_size);
+    data->append(static_cast<char*>(buffer.memory()), image_size);
+  }
+}
+
+webkit_glue::ClipboardClient::WriteContext*
+RendererClipboardClient::CreateWriteContext() {
+  return new RendererClipboardWriteContext;
+}