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

87 lines
3.1 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 "libcef/common/extensions/extensions_util.h"
#include "base/command_line.h"
#include "base/strings/string_util.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/common/extensions/extension_constants.h"
#include "chrome/common/pdf_util.h"
#include "chrome/common/url_constants.h"
#include "content/public/renderer/render_frame.h"
#include "extensions/common/constants.h"
#include "extensions/renderer/guest_view/mime_handler_view/post_message_support.h"
#include "pdf/pdf_features.h"
#include "services/service_manager/public/cpp/interface_provider.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 is_windowless)
: is_windowless_(is_windowless) {}
CefPrintRenderFrameHelperDelegate::~CefPrintRenderFrameHelperDelegate() =
default;
// Return the PDF object element if |frame| is the out of process PDF extension.
blink::WebElement CefPrintRenderFrameHelperDelegate::GetPdfElement(
blink::WebLocalFrame* frame) {
if (IsPdfInternalPluginAllowedOrigin(frame->GetSecurityOrigin())) {
DCHECK(!base::FeatureList::IsEnabled(chrome_pdf::features::kPdfUnseasoned));
// <object> with id="plugin" is created in
// chrome/browser/resources/pdf/pdf_viewer_base.js.
auto viewer_element = frame->GetDocument().GetElementById("viewer");
if (!viewer_element.IsNull() && !viewer_element.ShadowRoot().IsNull()) {
auto plugin_element =
viewer_element.ShadowRoot().QuerySelector("#plugin");
if (!plugin_element.IsNull()) {
return plugin_element;
}
}
NOTREACHED();
return blink::WebElement();
}
if (frame->Parent() &&
IsPdfInternalPluginAllowedOrigin(frame->Parent()->GetSecurityOrigin())) {
DCHECK(base::FeatureList::IsEnabled(chrome_pdf::features::kPdfUnseasoned));
auto plugin_element = frame->GetDocument().QuerySelector("embed");
DCHECK(!plugin_element.IsNull());
return plugin_element;
}
return blink::WebElement();
}
bool CefPrintRenderFrameHelperDelegate::IsPrintPreviewEnabled() {
return !is_windowless_ && PrintPreviewEnabled();
}
bool CefPrintRenderFrameHelperDelegate::OverridePrint(
blink::WebLocalFrame* frame) {
auto* post_message_support =
extensions::PostMessageSupport::FromWebLocalFrame(frame);
if (post_message_support) {
// 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");
post_message_support->PostMessageFromValue(message);
return true;
}
return false;
}
} // namespace extensions