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// Copyright 2015 The Chromium Authors
// 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 <utility>
#include <vector>
#include "base/check.h"
#include "base/command_line.h"
#include "base/strings/string_util.h"
#include "chrome/common/chrome_switches.h"
#include "content/public/renderer/render_frame.h"
#include "mojo/public/cpp/bindings/remote.h"
#include "pdf/buildflags.h"
#include "third_party/blink/public/platform/browser_interface_broker_proxy.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"
#include "url/origin.h"
#if BUILDFLAG(ENABLE_PDF)
#include "chrome/common/webui_url_constants.h"
#include "components/pdf/common/pdf_util.h"
#include "extensions/renderer/guest_view/mime_handler_view/post_message_support.h"
#endif // BUILDFLAG(ENABLE_PDF)
ChromePrintRenderFrameHelperDelegate::ChromePrintRenderFrameHelperDelegate() =
default;
ChromePrintRenderFrameHelperDelegate::~ChromePrintRenderFrameHelperDelegate() =
default;
// Returns the PDF object element if the parent of `frame` is the PDF extension
// frame.
blink::WebElement ChromePrintRenderFrameHelperDelegate::GetPdfElement(
blink::WebLocalFrame* frame) {
#if BUILDFLAG(ENABLE_PDF)
if (frame->Parent()) {
// Note that the parent of `frame` is for the to-be-printed PDF, so it can
// never be the PDF viewer embedded in Print Preview.
const url::Origin parent_origin(frame->Parent()->GetSecurityOrigin());
CHECK_NE(parent_origin,
url::Origin::Create(GURL(chrome::kChromeUIPrintURL)));
if (IsPdfExtensionOrigin(parent_origin)) {
auto plugin_element = frame->GetDocument().QuerySelector("embed");
CHECK(!plugin_element.IsNull());
return plugin_element;
}
}
#endif // BUILDFLAG(ENABLE_PDF)
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_PDF)
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::Value::Dict message;
message.Set("type", "print");
post_message_support->PostMessageFromValue(base::Value(std::move(message)));
return true;
}
#endif // BUILDFLAG(ENABLE_PDF)
return false;
}
bool ChromePrintRenderFrameHelperDelegate::ShouldGenerateTaggedPDF() {
return true;
}
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