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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/numerics/safe_math.h" | |
11 #include "base/strings/string16.h" | |
12 #include "content/common/clipboard_messages.h" | |
13 #include "content/public/renderer/content_renderer_client.h" | |
14 #include "content/renderer/render_thread_impl.h" | |
15 #include "content/renderer/scoped_clipboard_writer_glue.h" | |
16 #include "ui/base/clipboard/clipboard.h" | |
17 #include "ui/gfx/size.h" | |
18 | |
19 namespace content { | |
20 | |
21 namespace { | |
22 | |
23 class RendererClipboardWriteContext : public ClipboardClient::WriteContext { | |
24 public: | |
25 RendererClipboardWriteContext(); | |
26 virtual ~RendererClipboardWriteContext(); | |
27 virtual void WriteBitmapFromPixels(ui::Clipboard::ObjectMap* objects, | |
28 const void* pixels, | |
29 const gfx::Size& size) OVERRIDE; | |
30 virtual void Flush(const ui::Clipboard::ObjectMap& objects) OVERRIDE; | |
31 | |
32 private: | |
33 scoped_ptr<base::SharedMemory> shared_buf_; | |
34 DISALLOW_COPY_AND_ASSIGN(RendererClipboardWriteContext); | |
35 }; | |
36 | |
37 RendererClipboardWriteContext::RendererClipboardWriteContext() { | |
38 } | |
39 | |
40 RendererClipboardWriteContext::~RendererClipboardWriteContext() { | |
41 } | |
42 | |
43 // This definition of WriteBitmapFromPixels uses shared memory to communicate | |
44 // across processes. | |
45 void RendererClipboardWriteContext::WriteBitmapFromPixels( | |
46 ui::Clipboard::ObjectMap* objects, | |
47 const void* pixels, | |
48 const gfx::Size& size) { | |
49 // Do not try to write a bitmap more than once | |
50 if (shared_buf_) | |
51 return; | |
52 | |
53 base::CheckedNumeric<uint32> checked_buf_size = 4; | |
54 checked_buf_size *= size.width(); | |
55 checked_buf_size *= size.height(); | |
56 if (!checked_buf_size.IsValid()) | |
57 return; | |
58 | |
59 uint32 buf_size = checked_buf_size.ValueOrDie(); | |
60 | |
61 // Allocate a shared memory buffer to hold the bitmap bits. | |
62 shared_buf_.reset(ChildThread::current()->AllocateSharedMemory(buf_size)); | |
63 if (!shared_buf_) | |
64 return; | |
65 | |
66 // Copy the bits into shared memory | |
67 DCHECK(shared_buf_->memory()); | |
68 memcpy(shared_buf_->memory(), pixels, buf_size); | |
69 shared_buf_->Unmap(); | |
70 | |
71 ui::Clipboard::ObjectMapParam size_param; | |
72 const char* size_data = reinterpret_cast<const char*>(&size); | |
73 for (size_t i = 0; i < sizeof(gfx::Size); ++i) | |
74 size_param.push_back(size_data[i]); | |
75 | |
76 ui::Clipboard::ObjectMapParams params; | |
77 | |
78 // The first parameter is replaced on the receiving end with a pointer to | |
79 // a shared memory object containing the bitmap. We reserve space for it here. | |
80 ui::Clipboard::ObjectMapParam place_holder_param; | |
81 params.push_back(place_holder_param); | |
82 params.push_back(size_param); | |
83 (*objects)[ui::Clipboard::CBF_SMBITMAP] = params; | |
84 } | |
85 | |
86 // Flushes the objects to the clipboard with an IPC. | |
87 void RendererClipboardWriteContext::Flush( | |
88 const ui::Clipboard::ObjectMap& objects) { | |
89 if (shared_buf_) { | |
90 RenderThreadImpl::current()->Send( | |
91 new ClipboardHostMsg_WriteObjectsSync(objects, shared_buf_->handle())); | |
92 } else { | |
93 RenderThreadImpl::current()->Send( | |
94 new ClipboardHostMsg_WriteObjectsAsync(objects)); | |
95 } | |
96 } | |
97 | |
98 } // anonymous namespace | |
99 | |
100 RendererClipboardClient::RendererClipboardClient() { | |
101 } | |
102 | |
103 RendererClipboardClient::~RendererClipboardClient() { | |
104 } | |
105 | |
106 ui::Clipboard* RendererClipboardClient::GetClipboard() { | |
107 return NULL; | |
108 } | |
109 | |
110 uint64 RendererClipboardClient::GetSequenceNumber(ui::ClipboardType type) { | |
111 uint64 sequence_number = 0; | |
112 RenderThreadImpl::current()->Send( | |
113 new ClipboardHostMsg_GetSequenceNumber(type, &sequence_number)); | |
114 return sequence_number; | |
115 } | |
116 | |
117 bool RendererClipboardClient::IsFormatAvailable(content::ClipboardFormat format, | |
118 ui::ClipboardType type) { | |
119 bool result = false; | |
120 RenderThreadImpl::current()->Send( | |
121 new ClipboardHostMsg_IsFormatAvailable(format, type, &result)); | |
122 return result; | |
123 } | |
124 | |
125 void RendererClipboardClient::Clear(ui::ClipboardType type) { | |
126 RenderThreadImpl::current()->Send(new ClipboardHostMsg_Clear(type)); | |
127 } | |
128 | |
129 void RendererClipboardClient::ReadAvailableTypes( | |
130 ui::ClipboardType type, | |
131 std::vector<base::string16>* types, | |
132 bool* contains_filenames) { | |
133 RenderThreadImpl::current()->Send(new ClipboardHostMsg_ReadAvailableTypes( | |
134 type, types, contains_filenames)); | |
135 } | |
136 | |
137 void RendererClipboardClient::ReadText(ui::ClipboardType type, | |
138 base::string16* result) { | |
139 RenderThreadImpl::current()->Send( | |
140 new ClipboardHostMsg_ReadText(type, result)); | |
141 } | |
142 | |
143 void 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 | |
151 void RendererClipboardClient::ReadRTF(ui::ClipboardType type, | |
152 std::string* result) { | |
153 RenderThreadImpl::current()->Send(new ClipboardHostMsg_ReadRTF(type, result)); | |
154 } | |
155 | |
156 void RendererClipboardClient::ReadImage(ui::ClipboardType type, | |
157 std::string* data) { | |
158 base::SharedMemoryHandle image_handle; | |
159 uint32 image_size = 0; | |
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 | |
169 void 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 | |
176 ClipboardClient::WriteContext* RendererClipboardClient::CreateWriteContext() { | |
177 return new RendererClipboardWriteContext; | |
178 } | |
179 | |
180 } // namespace content | |
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