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 18 namespace content { 19 20 namespace { 21 22 class 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 36 RendererClipboardWriteContext::RendererClipboardWriteContext() { 37 } 38 39 RendererClipboardWriteContext::~RendererClipboardWriteContext() { 40 } 41 42 // This definition of WriteBitmapFromPixels uses shared memory to communicate 43 // across processes. 44 void 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. 80 void 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 93 RendererClipboardClient::RendererClipboardClient() { 94 } 95 96 RendererClipboardClient::~RendererClipboardClient() { 97 } 98 99 ui::Clipboard* RendererClipboardClient::GetClipboard() { 100 return NULL; 101 } 102 103 uint64 RendererClipboardClient::GetSequenceNumber( 104 ui::Clipboard::Buffer buffer) { 105 uint64 sequence_number = 0; 106 RenderThreadImpl::current()->Send( 107 new ClipboardHostMsg_GetSequenceNumber(buffer, 108 &sequence_number)); 109 return sequence_number; 110 } 111 112 bool RendererClipboardClient::IsFormatAvailable( 113 const ui::Clipboard::FormatType& format, 114 ui::Clipboard::Buffer buffer) { 115 bool result; 116 RenderThreadImpl::current()->Send( 117 new ClipboardHostMsg_IsFormatAvailable(format, buffer, &result)); 118 return result; 119 } 120 121 void RendererClipboardClient::Clear(ui::Clipboard::Buffer buffer) { 122 RenderThreadImpl::current()->Send(new ClipboardHostMsg_Clear(buffer)); 123 } 124 125 void RendererClipboardClient::ReadAvailableTypes( 126 ui::Clipboard::Buffer buffer, 127 std::vector<string16>* types, 128 bool* contains_filenames) { 129 RenderThreadImpl::current()->Send(new ClipboardHostMsg_ReadAvailableTypes( 130 buffer, types, contains_filenames)); 131 } 132 133 void RendererClipboardClient::ReadText(ui::Clipboard::Buffer buffer, 134 string16* result) { 135 RenderThreadImpl::current()->Send( 136 new ClipboardHostMsg_ReadText(buffer, result)); 137 } 138 139 void RendererClipboardClient::ReadAsciiText(ui::Clipboard::Buffer buffer, 140 std::string* result) { 141 RenderThreadImpl::current()->Send( 142 new ClipboardHostMsg_ReadAsciiText(buffer, result)); 143 } 144 145 void RendererClipboardClient::ReadHTML(ui::Clipboard::Buffer buffer, 146 string16* markup, 147 GURL* url, uint32* fragment_start, 148 uint32* fragment_end) { 149 RenderThreadImpl::current()->Send( 150 new ClipboardHostMsg_ReadHTML(buffer, markup, url, fragment_start, 151 fragment_end)); 152 } 153 154 void RendererClipboardClient::ReadRTF(ui::Clipboard::Buffer buffer, 155 std::string* result) { 156 RenderThreadImpl::current()->Send( 157 new ClipboardHostMsg_ReadRTF(buffer, result)); 158 } 159 160 void RendererClipboardClient::ReadImage(ui::Clipboard::Buffer buffer, 161 std::string* data) { 162 base::SharedMemoryHandle image_handle; 163 uint32 image_size; 164 RenderThreadImpl::current()->Send( 165 new ClipboardHostMsg_ReadImage(buffer, &image_handle, &image_size)); 166 if (base::SharedMemory::IsHandleValid(image_handle)) { 167 base::SharedMemory buffer(image_handle, true); 168 buffer.Map(image_size); 169 data->append(static_cast<char*>(buffer.memory()), image_size); 170 } 171 } 172 173 void RendererClipboardClient::ReadCustomData(ui::Clipboard::Buffer buffer, 174 const string16& type, 175 string16* data) { 176 RenderThreadImpl::current()->Send( 177 new ClipboardHostMsg_ReadCustomData(buffer, type, data)); 178 } 179 180 void RendererClipboardClient::ReadData(const ui::Clipboard::FormatType& format, 181 std::string* data) { 182 RenderThreadImpl::current()->Send( 183 new ClipboardHostMsg_ReadData(format, data)); 184 } 185 186 ClipboardClient::WriteContext* RendererClipboardClient::CreateWriteContext() { 187 return new RendererClipboardWriteContext; 188 } 189 190 } // namespace content 191