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// 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/renderer/printing/chrome_print_render_frame_helper_delegate.h"
#include <vector>
#include "base/command_line.h"
#include "base/strings/string_util.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/common/prerender.mojom.h"
#include "chrome/common/url_constants.h"
#include "chrome/renderer/prerender/prerender_helper.h"
#include "content/public/renderer/render_frame.h"
#include "extensions/buildflags/buildflags.h"
#include "mojo/public/cpp/bindings/remote.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"
#if BUILDFLAG(ENABLE_EXTENSIONS)
#include "chrome/common/extensions/extension_constants.h"
#include "extensions/common/constants.h"
#include "extensions/renderer/guest_view/mime_handler_view/post_message_support.h"
#endif // BUILDFLAG(ENABLE_EXTENSIONS)
ChromePrintRenderFrameHelperDelegate::ChromePrintRenderFrameHelperDelegate() =
default;
ChromePrintRenderFrameHelperDelegate::~ChromePrintRenderFrameHelperDelegate() =
default;
bool ChromePrintRenderFrameHelperDelegate::CancelPrerender(
content::RenderFrame* render_frame) {
if (!prerender::PrerenderHelper::IsPrerendering(render_frame))
return false;
mojo::Remote<chrome::mojom::PrerenderCanceler> canceler;
render_frame->GetRemoteInterfaces()->GetInterface(
canceler.BindNewPipeAndPassReceiver());
canceler->CancelPrerenderForPrinting();
return true;
}
// Return the PDF object element if |frame| is the out of process PDF extension.
blink::WebElement ChromePrintRenderFrameHelperDelegate::GetPdfElement(
blink::WebLocalFrame* frame) {
#if BUILDFLAG(ENABLE_EXTENSIONS)
GURL url = frame->GetDocument().Url();
bool inside_print_preview = url.GetOrigin() == chrome::kChromeUIPrintURL;
bool inside_pdf_extension =
url.SchemeIs(extensions::kExtensionScheme) &&
url.host_piece() == extension_misc::kPdfExtensionId;
if (inside_print_preview || inside_pdf_extension) {
// <object> with id="plugin" is created in
// chrome/browser/resources/pdf/pdf_viewer.js.
auto plugin_element = frame->GetDocument().GetElementById("plugin");
if (!plugin_element.IsNull()) {
return plugin_element;
}
NOTREACHED();
}
#endif // BUILDFLAG(ENABLE_EXTENSIONS)
return blink::WebElement();
}
bool ChromePrintRenderFrameHelperDelegate::IsPrintPreviewEnabled() {
base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
return !command_line->HasSwitch(switches::kDisablePrintPreview);
}
bool ChromePrintRenderFrameHelperDelegate::OverridePrint(
blink::WebLocalFrame* frame) {
#if BUILDFLAG(ENABLE_EXTENSIONS)
auto* post_message_support =
extensions::PostMessageSupport::FromWebLocalFrame(frame);
if (post_message_support) {
// This message is handled in chrome/browser/resources/pdf/pdf_viewer.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;
}
#endif // BUILDFLAG(ENABLE_EXTENSIONS)
return false;
}
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