1 // Copyright (c) 2011 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 #include "content/renderer/mhtml_generator.h"
6
7 #include "base/platform_file.h"
8 #include "content/common/view_messages.h"
9 #include "content/renderer/render_view_impl.h"
10 #include "third_party/WebKit/public/platform/WebCString.h"
11 #include "third_party/WebKit/public/web/WebPageSerializer.h"
12
13 namespace content {
14
MHTMLGenerator(RenderViewImpl * render_view)15 MHTMLGenerator::MHTMLGenerator(RenderViewImpl* render_view)
16 : RenderViewObserver(render_view),
17 file_(base::kInvalidPlatformFileValue) {
18 }
19
~MHTMLGenerator()20 MHTMLGenerator::~MHTMLGenerator() {
21 }
22
23 // RenderViewObserver implementation:
OnMessageReceived(const IPC::Message & message)24 bool MHTMLGenerator::OnMessageReceived(const IPC::Message& message) {
25 bool handled = true;
26 IPC_BEGIN_MESSAGE_MAP(MHTMLGenerator, message)
27 IPC_MESSAGE_HANDLER(ViewMsg_SavePageAsMHTML, OnSavePageAsMHTML)
28 IPC_MESSAGE_UNHANDLED(handled = false)
29 IPC_END_MESSAGE_MAP()
30 return handled;
31 }
32
OnSavePageAsMHTML(int job_id,IPC::PlatformFileForTransit file_for_transit)33 void MHTMLGenerator::OnSavePageAsMHTML(
34 int job_id, IPC::PlatformFileForTransit file_for_transit) {
35 base::PlatformFile file =
36 IPC::PlatformFileForTransitToPlatformFile(file_for_transit);
37 file_ = file;
38 int64 size = GenerateMHTML();
39 base::ClosePlatformFile(file);
40 NotifyBrowser(job_id, size);
41 }
42
NotifyBrowser(int job_id,int64 data_size)43 void MHTMLGenerator::NotifyBrowser(int job_id, int64 data_size) {
44 render_view()->Send(new ViewHostMsg_SavedPageAsMHTML(job_id, data_size));
45 file_ = base::kInvalidPlatformFileValue;
46 }
47
48 // TODO(jcivelli): write the chunks in deferred tasks to give a chance to the
49 // message loop to process other events.
GenerateMHTML()50 int64 MHTMLGenerator::GenerateMHTML() {
51 blink::WebCString mhtml =
52 blink::WebPageSerializer::serializeToMHTML(render_view()->GetWebView());
53 const size_t chunk_size = 1024;
54 const char* data = mhtml.data();
55 size_t total_bytes_written = 0;
56 while (total_bytes_written < mhtml.length()) {
57 size_t copy_size =
58 std::min(mhtml.length() - total_bytes_written, chunk_size);
59 int bytes_written = base::WritePlatformFile(file_, total_bytes_written,
60 data + total_bytes_written,
61 copy_size);
62 if (bytes_written == -1)
63 return -1;
64 total_bytes_written += bytes_written;
65 }
66 return total_bytes_written;
67 }
68
69 } // namespace content
70