Set document posting "cp-dialog-set-print-document" message

chrome/browser/printing/print_dialog_cloud_win.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/printing/print_dialog_cloud.h"
 
 #include "base/base64.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
+#include "base/json/json_writer.h"
 #include "base/memory/ref_counted_memory.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/thread_task_runner_handle.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/browser/ui/scoped_tabbed_browser_displayer.h"
 #include "chrome/common/chrome_switches.h"
 #include "components/cloud_devices/common/cloud_devices_urls.h"
 #include "components/google/core/browser/google_util.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/browser_thread.h"
+#include "content/public/browser/message_port_provider.h"
 #include "content/public/browser/render_frame_host.h"
+#include "content/public/common/message_port_types.h"
 
 namespace print_dialog_cloud {
 
 namespace {
 
 // Limit is used only to allocate memory. Cloud has own small limit.
 const int kMaxFileSize = 1024 * 1024 * 1024;
 
 // Sets print data into Cloud Print widget.
 class PrintDataSetter : public content::WebContentsObserver {
  public:
   PrintDataSetter(content::WebContents* web_contents,
                   const scoped_refptr<base::RefCountedMemory>& data,
                   const base::string16& print_job_title,
                   const base::string16& print_ticket,
                   const std::string& file_type)
       : WebContentsObserver(web_contents) {
     DCHECK_NE(data->size(), 0u);
     std::string base64_data;
     base::Base64Encode(base::StringPiece(data->front_as<char>(), data->size()),
                        &base64_data);
     std::string header("data:");
     header.append(file_type);
     header.append(";base64,");
     base64_data.insert(0, header);
 
-    InitPrintFunction(base::StringValue(base64_data),
-                      base::StringValue(print_job_title));
+    base::DictionaryValue message_data;
+    message_data.SetString("type", "dataUrl");
+    message_data.SetString("title", print_job_title);
+    message_data.SetString("content", base64_data);
+    std::string json_data;
+    base::JSONWriter::Write(message_data, &json_data);
+    message_data_ = L"cp-dialog-set-print-document::";
+    message_data_.append(base::UTF8ToUTF16(json_data));
   }
 
  private:
   // Overridden from content::WebContentsObserver:
   void DocumentLoadedInFrame(
       content::RenderFrameHost* render_frame_host) override {
-    if (cloud_devices::IsCloudPrintURL(web_contents()->GetURL()))
-      return; // Disabled because of crbug.com/542821.
+    GURL url = web_contents()->GetURL();
+    if (cloud_devices::IsCloudPrintURL(url)) {
+      base::string16 origin = base::UTF8ToUTF16(url.GetOrigin().spec());
+      content::MessagePortProvider::PostMessageToFrame(
+          web_contents(), origin, origin, message_data_,
+          std::vector<content::TransferredMessagePort>());
+    }
   }
 
   void WebContentsDestroyed() override { delete this; }
 
-  void InitPrintFunction(const base::Value& arg1, const base::Value& arg2) {
-    std::vector<const base::Value*> args;
-    args.push_back(&arg1);
-    args.push_back(&arg2);
-    print_function_ =
-        content::WebUI::GetJavascriptCall("printApp._printDataUrl", args);
-  }
-
-  base::string16 print_function_;
-
+  base::string16 message_data_;
   DISALLOW_COPY_AND_ASSIGN(PrintDataSetter);
 };
 
 void CreatePrintDialog(content::BrowserContext* browser_context,
                        const base::string16& print_job_title,
                        const base::string16& print_ticket,
                        const std::string& file_type,
                        const scoped_refptr<base::RefCountedMemory>& data) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
   Profile* profile = Profile::FromBrowserContext(browser_context);
@@ skipping 60 matching lines @@
   std::string file_type =
       command_line.GetSwitchValueASCII(switches::kCloudPrintFileType);
   if (file_type.empty())
     file_type = "application/pdf";
   CreatePrintDialogForFile(profile, cloud_print_file, print_job_title,
                            print_job_print_ticket, file_type);
   return true;
 }
 
 }  // namespace print_dialog_cloud