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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_web_view_helper_delegate.h"
#include <vector>
#include "base/command_line.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/common/render_messages.h"
#include "chrome/renderer/prerender/prerender_helper.h"
#include "content/public/renderer/render_frame.h"
#include "content/public/renderer/render_view.h"
#include "ipc/ipc_message.h"
#include "third_party/WebKit/public/web/WebDocument.h"
#include "third_party/WebKit/public/web/WebElement.h"
#include "third_party/WebKit/public/web/WebLocalFrame.h"
#if defined(ENABLE_EXTENSIONS)
#include "chrome/common/extensions/extension_constants.h"
#include "extensions/common/constants.h"
#include "extensions/renderer/guest_view/mime_handler_view/mime_handler_view_container.h"
#endif // defined(ENABLE_EXTENSIONS)
ChromePrintWebViewHelperDelegate::~ChromePrintWebViewHelperDelegate(){
}
bool ChromePrintWebViewHelperDelegate::CancelPrerender(
content::RenderView* render_view, int routing_id) {
if (!render_view || !prerender::PrerenderHelper::IsPrerendering(
render_view->GetMainRenderFrame()))
return false;
return render_view->Send(
new ChromeViewHostMsg_CancelPrerenderForPrinting(routing_id));
}
// Return the PDF object element if |frame| is the out of process PDF extension.
blink::WebElement ChromePrintWebViewHelperDelegate::GetPdfElement(
blink::WebLocalFrame* frame) {
#if defined(ENABLE_EXTENSIONS)
GURL url = frame->document().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->document().getElementById("plugin");
if (!plugin_element.isNull()) {
return plugin_element;
}
NOTREACHED();
}
#endif // defined(ENABLE_EXTENSIONS)
return blink::WebElement();
}
bool ChromePrintWebViewHelperDelegate::IsPrintPreviewEnabled() {
base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
return !command_line->HasSwitch(switches::kDisablePrintPreview);
}
bool ChromePrintWebViewHelperDelegate::OverridePrint(
blink::WebLocalFrame* frame) {
#if defined(ENABLE_EXTENSIONS)
if (!frame->document().isPluginDocument())
return false;
std::vector<extensions::MimeHandlerViewContainer*> 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;
}
#endif // defined(ENABLE_EXTENSIONS)
return false;
}
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