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https://bitbucket.org/chromiumembedded/cef
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78 lines
2.9 KiB
C++
78 lines
2.9 KiB
C++
// Copyright 2015 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "libcef/renderer/extensions/print_render_frame_helper_delegate.h"
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#include <vector>
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#include "libcef/common/extensions/extensions_util.h"
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#include "base/command_line.h"
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#include "base/strings/string_util.h"
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#include "chrome/common/chrome_switches.h"
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#include "chrome/common/extensions/extension_constants.h"
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#include "chrome/common/url_constants.h"
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#include "content/public/renderer/render_frame.h"
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#include "extensions/common/constants.h"
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#include "extensions/renderer/guest_view/mime_handler_view/post_message_support.h"
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#include "services/service_manager/public/cpp/interface_provider.h"
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#include "third_party/blink/public/web/web_document.h"
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#include "third_party/blink/public/web/web_element.h"
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#include "third_party/blink/public/web/web_local_frame.h"
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namespace extensions {
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CefPrintRenderFrameHelperDelegate::CefPrintRenderFrameHelperDelegate(
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bool is_windowless)
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: is_windowless_(is_windowless) {}
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CefPrintRenderFrameHelperDelegate::~CefPrintRenderFrameHelperDelegate() {}
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// Return the PDF object element if |frame| is the out of process PDF extension.
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blink::WebElement CefPrintRenderFrameHelperDelegate::GetPdfElement(
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blink::WebLocalFrame* frame) {
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GURL url = frame->GetDocument().Url();
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bool inside_print_preview = url.GetOrigin() == chrome::kChromeUIPrintURL;
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bool inside_pdf_extension =
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url.SchemeIs(extensions::kExtensionScheme) &&
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url.host_piece() == extension_misc::kPdfExtensionId;
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if (inside_print_preview || inside_pdf_extension) {
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// <object> with id="plugin" is created in
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// chrome/browser/resources/pdf/pdf_viewer_base.js.
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auto viewer_element = frame->GetDocument().GetElementById("viewer");
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if (!viewer_element.IsNull() && !viewer_element.ShadowRoot().IsNull()) {
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auto plugin_element =
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viewer_element.ShadowRoot().QuerySelector("#plugin");
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if (!plugin_element.IsNull()) {
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return plugin_element;
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}
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}
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NOTREACHED();
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}
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return blink::WebElement();
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}
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bool CefPrintRenderFrameHelperDelegate::IsPrintPreviewEnabled() {
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return !is_windowless_ && PrintPreviewEnabled();
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}
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bool CefPrintRenderFrameHelperDelegate::OverridePrint(
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blink::WebLocalFrame* frame) {
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auto* post_message_support =
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extensions::PostMessageSupport::FromWebLocalFrame(frame);
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if (post_message_support) {
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// This message is handled in chrome/browser/resources/pdf/pdf.js and
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// instructs the PDF plugin to print. This is to make window.print() on a
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// PDF plugin document correctly print the PDF. See
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// https://crbug.com/448720.
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base::DictionaryValue message;
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message.SetString("type", "print");
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post_message_support->PostMessageFromValue(message);
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return true;
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}
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return false;
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}
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} // namespace extensions
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