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 15 MHTMLGenerator::MHTMLGenerator(RenderViewImpl* render_view) 16 : RenderViewObserver(render_view), 17 file_(base::kInvalidPlatformFileValue) { 18 } 19 20 MHTMLGenerator::~MHTMLGenerator() { 21 } 22 23 // RenderViewObserver implementation: 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 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 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. 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
