[Chrome] Support NumCopies print preset

chrome/renderer/pepper/pepper_printing_renderer_host.cc

+// Copyright (c) 2014 The Chromium Authors. All rights reserved.

[Vitaly Buka (NO REVIEWS), 2014/09/03 21:36:24]

Copyright (c) 2014 -> Copyright 2014
please update other files of your change to

+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/renderer/pepper/pepper_printing_renderer_host.h"
+
+#include "chrome/common/print_messages.h"
+#include "chrome/renderer/printing/print_web_view_helper.h"
+#include "content/public/renderer/pepper_plugin_instance.h"
+#include "content/public/renderer/render_view.h"
+#include "content/public/renderer/renderer_ppapi_host.h"
+#include "ppapi/host/dispatch_host_message.h"
+#include "ppapi/proxy/ppapi_messages.h"
+#include "third_party/WebKit/public/web/WebDocument.h"
+#include "third_party/WebKit/public/web/WebElement.h"
+#include "third_party/WebKit/public/web/WebLocalFrame.h"
+#include "third_party/WebKit/public/web/WebPluginContainer.h"
+#include "third_party/WebKit/public/web/WebView.h"
+
+PepperPrintingRendererHost::PepperPrintingRendererHost(
+    content::RendererPpapiHost* host,
+    PP_Instance instance,
+    PP_Resource resource)
+    : ppapi::host::ResourceHost(host->GetPpapiHost(), instance, resource),
+      host_(host) {
+}
+
+PepperPrintingRendererHost::~PepperPrintingRendererHost() {
+}
+
+int32_t PepperPrintingRendererHost::OnResourceMessageReceived(
+    const IPC::Message& msg,
+    ppapi::host::HostMessageContext* context) {
+  PPAPI_BEGIN_MESSAGE_MAP(PepperPrintingRendererHost, msg)
+    PPAPI_DISPATCH_HOST_RESOURCE_CALL(
+        PpapiHostMsg_PrintHost_SetPrintPresetOptionsFromDocument,
+        OnHostMsgSetPrintPresetOptionsFromDocument)
+  PPAPI_END_MESSAGE_MAP()
+  return PP_ERROR_FAILED;
+}
+
+int32_t PepperPrintingRendererHost::OnHostMsgSetPrintPresetOptionsFromDocument(
+    ppapi::host::HostMessageContext* context,
+    PP_PrintPresetOptions_Dev& print_options) {
+#if defined(ENABLE_FULL_PRINTING)
+  content::PepperPluginInstance* instance =
+      host_->GetPluginInstance(pp_instance());
+  if (!instance)
+    return PP_ERROR_FAILED;
+
+  blink::WebElement element = instance->GetContainer()->element();
+  blink::WebView* view = element.document().frame()->view();
+  content::RenderView* render_view = content::RenderView::FromWebView(view);
+
+  using printing::PrintWebViewHelper;
+  PrintWebViewHelper* print_view_helper = PrintWebViewHelper::Get(render_view);

[Vitaly Buka (NO REVIEWS), 2014/09/03 21:36:24]

why not to send message to browser directly, without using helper?

[Nikhil, 2014/09/04 11:42:53]

Yea, we can send from here without going to helper. But it's not working. Please
see my other comment.

[raymes, 2014/09/05 00:06:41]

Also - another thing to keep in mind is that we could simplify this CL a lot if
there is a way to set the number of copies in the browser directly. What we
would do is switch to using the pepper_printing_host.cc that is already inside
the browser. If we can set the number of copies directly from inside that file,
then we don't have to add a new printing host in the renderer. It would be best
to go down that road if it's possible. It may also help solve your problem
(though I have no idea what's actually causing the problem you're seeing).

+  if (print_view_helper) {
+    PrintHostMsg_SetOptionsFromDocument_Params params;
+    params.is_scaling_disabled = print_options.is_scaling_disabled;
+    params.copies = print_options.copies;
+
+    print_view_helper->SetPrintPresetOptionsFromDocument(params);
+    return PP_OK;
+  }
+#endif
+  return PP_ERROR_FAILED;
+}