1// Copyright (c) 2012 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5// This file provides the embedder's side of the Clipboard interface.
6
7#include "content/renderer/renderer_clipboard_client.h"
8
9#include "base/memory/shared_memory.h"
10#include "base/strings/string16.h"
11#include "content/common/clipboard_messages.h"
12#include "content/public/renderer/content_renderer_client.h"
13#include "content/renderer/render_thread_impl.h"
14#include "content/renderer/scoped_clipboard_writer_glue.h"
15#include "ui/base/clipboard/clipboard.h"
16#include "ui/gfx/size.h"
17
18namespace content {
19
20namespace {
21
22class RendererClipboardWriteContext : public ClipboardClient::WriteContext {
23 public:
24  RendererClipboardWriteContext();
25  virtual ~RendererClipboardWriteContext();
26  virtual void WriteBitmapFromPixels(ui::Clipboard::ObjectMap* objects,
27                                     const void* pixels,
28                                     const gfx::Size& size) OVERRIDE;
29  virtual void Flush(const ui::Clipboard::ObjectMap& objects) OVERRIDE;
30
31 private:
32  scoped_ptr<base::SharedMemory> shared_buf_;
33  DISALLOW_COPY_AND_ASSIGN(RendererClipboardWriteContext);
34};
35
36RendererClipboardWriteContext::RendererClipboardWriteContext() {
37}
38
39RendererClipboardWriteContext::~RendererClipboardWriteContext() {
40}
41
42// This definition of WriteBitmapFromPixels uses shared memory to communicate
43// across processes.
44void RendererClipboardWriteContext::WriteBitmapFromPixels(
45    ui::Clipboard::ObjectMap* objects,
46    const void* pixels,
47    const gfx::Size& size) {
48  // Do not try to write a bitmap more than once
49  if (shared_buf_)
50    return;
51
52  uint32 buf_size = 4 * size.width() * size.height();
53
54  // Allocate a shared memory buffer to hold the bitmap bits.
55  shared_buf_.reset(ChildThread::current()->AllocateSharedMemory(buf_size));
56  if (!shared_buf_)
57    return;
58
59  // Copy the bits into shared memory
60  DCHECK(shared_buf_->memory());
61  memcpy(shared_buf_->memory(), pixels, buf_size);
62  shared_buf_->Unmap();
63
64  ui::Clipboard::ObjectMapParam size_param;
65  const char* size_data = reinterpret_cast<const char*>(&size);
66  for (size_t i = 0; i < sizeof(gfx::Size); ++i)
67    size_param.push_back(size_data[i]);
68
69  ui::Clipboard::ObjectMapParams params;
70
71  // The first parameter is replaced on the receiving end with a pointer to
72  // a shared memory object containing the bitmap. We reserve space for it here.
73  ui::Clipboard::ObjectMapParam place_holder_param;
74  params.push_back(place_holder_param);
75  params.push_back(size_param);
76  (*objects)[ui::Clipboard::CBF_SMBITMAP] = params;
77}
78
79// Flushes the objects to the clipboard with an IPC.
80void RendererClipboardWriteContext::Flush(
81    const ui::Clipboard::ObjectMap& objects) {
82  if (shared_buf_) {
83    RenderThreadImpl::current()->Send(
84        new ClipboardHostMsg_WriteObjectsSync(objects, shared_buf_->handle()));
85  } else {
86    RenderThreadImpl::current()->Send(
87        new ClipboardHostMsg_WriteObjectsAsync(objects));
88  }
89}
90
91}  // anonymous namespace
92
93RendererClipboardClient::RendererClipboardClient() {
94}
95
96RendererClipboardClient::~RendererClipboardClient() {
97}
98
99ui::Clipboard* RendererClipboardClient::GetClipboard() {
100  return NULL;
101}
102
103uint64 RendererClipboardClient::GetSequenceNumber(ui::ClipboardType type) {
104  uint64 sequence_number = 0;
105  RenderThreadImpl::current()->Send(
106      new ClipboardHostMsg_GetSequenceNumber(type, &sequence_number));
107  return sequence_number;
108}
109
110bool RendererClipboardClient::IsFormatAvailable(
111    const ui::Clipboard::FormatType& format,
112    ui::ClipboardType type) {
113  bool result;
114  RenderThreadImpl::current()->Send(
115      new ClipboardHostMsg_IsFormatAvailable(format, type, &result));
116  return result;
117}
118
119void RendererClipboardClient::Clear(ui::ClipboardType type) {
120  RenderThreadImpl::current()->Send(new ClipboardHostMsg_Clear(type));
121}
122
123void RendererClipboardClient::ReadAvailableTypes(
124    ui::ClipboardType type,
125    std::vector<base::string16>* types,
126    bool* contains_filenames) {
127  RenderThreadImpl::current()->Send(new ClipboardHostMsg_ReadAvailableTypes(
128      type, types, contains_filenames));
129}
130
131void RendererClipboardClient::ReadText(ui::ClipboardType type,
132                                       base::string16* result) {
133  RenderThreadImpl::current()->Send(
134      new ClipboardHostMsg_ReadText(type, result));
135}
136
137void RendererClipboardClient::ReadAsciiText(ui::ClipboardType type,
138                                            std::string* result) {
139  RenderThreadImpl::current()->Send(
140      new ClipboardHostMsg_ReadAsciiText(type, result));
141}
142
143void RendererClipboardClient::ReadHTML(ui::ClipboardType type,
144                                       base::string16* markup,
145                                       GURL* url, uint32* fragment_start,
146                                       uint32* fragment_end) {
147  RenderThreadImpl::current()->Send(new ClipboardHostMsg_ReadHTML(
148      type, markup, url, fragment_start, fragment_end));
149}
150
151void RendererClipboardClient::ReadRTF(ui::ClipboardType type,
152                                      std::string* result) {
153  RenderThreadImpl::current()->Send(new ClipboardHostMsg_ReadRTF(type, result));
154}
155
156void RendererClipboardClient::ReadImage(ui::ClipboardType type,
157                                        std::string* data) {
158  base::SharedMemoryHandle image_handle;
159  uint32 image_size;
160  RenderThreadImpl::current()->Send(
161      new ClipboardHostMsg_ReadImage(type, &image_handle, &image_size));
162  if (base::SharedMemory::IsHandleValid(image_handle)) {
163    base::SharedMemory buffer(image_handle, true);
164    buffer.Map(image_size);
165    data->append(static_cast<char*>(buffer.memory()), image_size);
166  }
167}
168
169void RendererClipboardClient::ReadCustomData(ui::ClipboardType clipboard_type,
170                                             const base::string16& type,
171                                             base::string16* data) {
172  RenderThreadImpl::current()->Send(
173      new ClipboardHostMsg_ReadCustomData(clipboard_type, type, data));
174}
175
176void RendererClipboardClient::ReadData(const ui::Clipboard::FormatType& format,
177                                       std::string* data) {
178  RenderThreadImpl::current()->Send(
179      new ClipboardHostMsg_ReadData(format, data));
180}
181
182ClipboardClient::WriteContext* RendererClipboardClient::CreateWriteContext() {
183  return new RendererClipboardWriteContext;
184}
185
186}  // namespace content
187