cef/libcef/renderer/extensions/print_render_frame_helper_d...

70 lines
2.4 KiB
C++

// 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 "libcef/renderer/extensions/print_render_frame_helper_delegate.h"
#include <vector>
#include "chrome/common/chrome_switches.h"
#include "chrome/common/extensions/extension_constants.h"
#include "content/public/renderer/render_frame.h"
#include "content/public/renderer/render_view.h"
#include "extensions/common/constants.h"
#include "extensions/renderer/guest_view/mime_handler_view/mime_handler_view_container.h"
#include "third_party/blink/public/web/web_document.h"
#include "third_party/blink/public/web/web_element.h"
#include "third_party/blink/public/web/web_local_frame.h"
namespace extensions {
CefPrintRenderFrameHelperDelegate::~CefPrintRenderFrameHelperDelegate() {}
bool CefPrintRenderFrameHelperDelegate::CancelPrerender(
content::RenderFrame* render_frame) {
return false;
}
// Return the PDF object element if |frame| is the out of process PDF extension.
blink::WebElement CefPrintRenderFrameHelperDelegate::GetPdfElement(
blink::WebLocalFrame* frame) {
GURL url = frame->GetDocument().Url();
if (url.SchemeIs(extensions::kExtensionScheme) &&
url.host() == extension_misc::kPdfExtensionId) {
// <object> with id="plugin" is created in
// chrome/browser/resources/pdf/pdf.js.
auto plugin_element = frame->GetDocument().GetElementById("plugin");
if (!plugin_element.IsNull()) {
return plugin_element;
}
NOTREACHED();
}
return blink::WebElement();
}
bool CefPrintRenderFrameHelperDelegate::IsPrintPreviewEnabled() {
return false;
}
bool CefPrintRenderFrameHelperDelegate::OverridePrint(
blink::WebLocalFrame* frame) {
if (!frame->GetDocument().IsPluginDocument())
return false;
auto mime_handlers = extensions::MimeHandlerViewContainer::FromRenderFrame(
content::RenderFrame::FromWebFrame(frame));
if (!mime_handlers.empty()) {
// This message is handled in chrome/browser/resources/pdf/pdf.js and
// instructs the PDF plugin to print. This is to make window.print() on a
// PDF plugin document correctly print the PDF. See
// https://crbug.com/448720.
base::DictionaryValue message;
message.SetString("type", "print");
mime_handlers.front()->PostMessageFromValue(message);
return true;
}
return false;
}
} // namespace extensions