// Copyright (c) 2012 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/browser/printing/printing_message_filter.h"

#include <memory>
#include <string>
#include <utility>

#include "base/bind.h"
#include "base/memory/singleton.h"
#include "base/task/post_task.h"
#include "build/build_config.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/printing/print_job_manager.h"
#include "chrome/browser/printing/print_view_manager.h"
#include "chrome/browser/printing/printer_query.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/common/pref_names.h"
#include "components/keyed_service/content/browser_context_keyed_service_shutdown_notifier_factory.h"
#include "components/printing/browser/print_manager_utils.h"
#include "components/printing/common/print_messages.h"
#include "content/public/browser/browser_task_traits.h"
#include "content/public/browser/render_frame_host.h"
#include "content/public/browser/web_contents.h"
#include "content/public/common/child_process_host.h"
#include "printing/buildflags/buildflags.h"

#if BUILDFLAG(ENABLE_PRINT_PREVIEW)
#include "chrome/browser/ui/webui/print_preview/print_preview_ui.h"
#endif

#if defined(OS_WIN) && defined(GOOGLE_CHROME_BUILD)
#include "chrome/browser/conflicts/module_database_win.h"
#endif

using content::BrowserThread;

namespace printing {

namespace {

class PrintingMessageFilterShutdownNotifierFactory
    : public BrowserContextKeyedServiceShutdownNotifierFactory {
 public:
  static PrintingMessageFilterShutdownNotifierFactory* GetInstance() {
    return base::Singleton<PrintingMessageFilterShutdownNotifierFactory>::get();
  }

 private:
  friend struct base::DefaultSingletonTraits<
      PrintingMessageFilterShutdownNotifierFactory>;

  PrintingMessageFilterShutdownNotifierFactory()
      : BrowserContextKeyedServiceShutdownNotifierFactory(
            "PrintingMessageFilter") {}

  ~PrintingMessageFilterShutdownNotifierFactory() override {}

  DISALLOW_COPY_AND_ASSIGN(PrintingMessageFilterShutdownNotifierFactory);
};

#if defined(OS_WIN) && BUILDFLAG(ENABLE_PRINT_PREVIEW)
content::WebContents* GetWebContentsForRenderFrame(int render_process_id,
                                                   int render_frame_id) {
  DCHECK_CURRENTLY_ON(BrowserThread::UI);
  content::RenderFrameHost* frame =
      content::RenderFrameHost::FromID(render_process_id, render_frame_id);
  return frame ? content::WebContents::FromRenderFrameHost(frame) : nullptr;
}

PrintViewManager* GetPrintViewManager(int render_process_id,
                                      int render_frame_id) {
  DCHECK_CURRENTLY_ON(BrowserThread::UI);
  content::WebContents* web_contents =
      GetWebContentsForRenderFrame(render_process_id, render_frame_id);
  return web_contents ? PrintViewManager::FromWebContents(web_contents)
                      : nullptr;
}
#endif  // defined(OS_WIN) && BUILDFLAG(ENABLE_PRINT_PREVIEW)

}  // namespace

PrintingMessageFilter::PrintingMessageFilter(int render_process_id,
                                             Profile* profile)
    : BrowserMessageFilter(PrintMsgStart),
      render_process_id_(render_process_id),
      queue_(g_browser_process->print_job_manager()->queue()) {
  DCHECK(queue_.get());
  printing_shutdown_notifier_ =
      PrintingMessageFilterShutdownNotifierFactory::GetInstance()
          ->Get(profile)
          ->Subscribe(base::Bind(&PrintingMessageFilter::ShutdownOnUIThread,
                                 base::Unretained(this)));
  is_printing_enabled_.Init(prefs::kPrintingEnabled, profile->GetPrefs());
  is_printing_enabled_.MoveToThread(
      base::CreateSingleThreadTaskRunnerWithTraits({BrowserThread::IO}));
}

PrintingMessageFilter::~PrintingMessageFilter() {
  DCHECK_CURRENTLY_ON(BrowserThread::UI);
}

void PrintingMessageFilter::ShutdownOnUIThread() {
  DCHECK_CURRENTLY_ON(BrowserThread::UI);
  is_printing_enabled_.Destroy();
  printing_shutdown_notifier_.reset();
}

void PrintingMessageFilter::OnDestruct() const {
  BrowserThread::DeleteOnUIThread::Destruct(this);
}

bool PrintingMessageFilter::OnMessageReceived(const IPC::Message& message) {
  bool handled = true;
  IPC_BEGIN_MESSAGE_MAP(PrintingMessageFilter, message)
    IPC_MESSAGE_HANDLER_DELAY_REPLY(PrintHostMsg_GetDefaultPrintSettings,
                                    OnGetDefaultPrintSettings)
    IPC_MESSAGE_HANDLER_DELAY_REPLY(PrintHostMsg_ScriptedPrint, OnScriptedPrint)
    IPC_MESSAGE_HANDLER_DELAY_REPLY(PrintHostMsg_UpdatePrintSettings,
                                    OnUpdatePrintSettings)
#if BUILDFLAG(ENABLE_PRINT_PREVIEW)
    IPC_MESSAGE_HANDLER(PrintHostMsg_CheckForCancel, OnCheckForCancel)
#endif
    IPC_MESSAGE_UNHANDLED(handled = false)
  IPC_END_MESSAGE_MAP()
  return handled;
}

void PrintingMessageFilter::OnGetDefaultPrintSettings(IPC::Message* reply_msg) {
  DCHECK_CURRENTLY_ON(BrowserThread::IO);
  scoped_refptr<PrinterQuery> printer_query;
  if (!is_printing_enabled_.GetValue()) {
    // Reply with NULL query.
    OnGetDefaultPrintSettingsReply(printer_query, reply_msg);
    return;
  }
  printer_query = queue_->PopPrinterQuery(0);
  if (!printer_query.get()) {
    printer_query =
        queue_->CreatePrinterQuery(render_process_id_, reply_msg->routing_id());
  }

  // Loads default settings. This is asynchronous, only the IPC message sender
  // will hang until the settings are retrieved.
  printer_query->GetSettings(
      PrinterQuery::GetSettingsAskParam::DEFAULTS, 0, false, DEFAULT_MARGINS,
      false, false,
      base::Bind(&PrintingMessageFilter::OnGetDefaultPrintSettingsReply, this,
                 printer_query, reply_msg));
}

void PrintingMessageFilter::OnGetDefaultPrintSettingsReply(
    scoped_refptr<PrinterQuery> printer_query,
    IPC::Message* reply_msg) {
  PrintMsg_Print_Params params;
  if (!printer_query.get() ||
      printer_query->last_status() != PrintingContext::OK) {
    params.Reset();
  } else {
    RenderParamsFromPrintSettings(printer_query->settings(), &params);
    params.document_cookie = printer_query->cookie();
  }
  PrintHostMsg_GetDefaultPrintSettings::WriteReplyParams(reply_msg, params);
  Send(reply_msg);
  // If printing was enabled.
  if (printer_query.get()) {
    // If user hasn't cancelled.
    if (printer_query->cookie() && printer_query->settings().dpi()) {
      queue_->QueuePrinterQuery(printer_query.get());
    } else {
      printer_query->StopWorker();
    }
  }
}

void PrintingMessageFilter::OnScriptedPrint(
    const PrintHostMsg_ScriptedPrint_Params& params,
    IPC::Message* reply_msg) {
#if defined(OS_WIN) && defined(GOOGLE_CHROME_BUILD)
  ModuleDatabase::GetInstance()->DisableThirdPartyBlocking();
#endif

  scoped_refptr<PrinterQuery> printer_query =
      queue_->PopPrinterQuery(params.cookie);
  if (!printer_query.get()) {
    printer_query =
        queue_->CreatePrinterQuery(render_process_id_, reply_msg->routing_id());
  }
  printer_query->GetSettings(
      PrinterQuery::GetSettingsAskParam::ASK_USER, params.expected_pages_count,
      params.has_selection, params.margin_type, params.is_scripted,
      params.is_modifiable,
      base::Bind(&PrintingMessageFilter::OnScriptedPrintReply, this,
                 printer_query, reply_msg));
}

void PrintingMessageFilter::OnScriptedPrintReply(
    scoped_refptr<PrinterQuery> printer_query,
    IPC::Message* reply_msg) {
  PrintMsg_PrintPages_Params params;
  if (printer_query->last_status() != PrintingContext::OK ||
      !printer_query->settings().dpi()) {
    params.Reset();
  } else {
    RenderParamsFromPrintSettings(printer_query->settings(), &params.params);
    params.params.document_cookie = printer_query->cookie();
    params.pages = PageRange::GetPages(printer_query->settings().ranges());
  }
  PrintHostMsg_ScriptedPrint::WriteReplyParams(reply_msg, params);
  Send(reply_msg);
  if (!params.params.dpi.IsEmpty() && params.params.document_cookie) {
    queue_->QueuePrinterQuery(printer_query.get());
  } else {
    printer_query->StopWorker();
  }
}

void PrintingMessageFilter::OnUpdatePrintSettings(int document_cookie,
                                                  base::Value job_settings,
                                                  IPC::Message* reply_msg) {
  scoped_refptr<PrinterQuery> printer_query;
  if (!is_printing_enabled_.GetValue()) {
    // Reply with NULL query.
    OnUpdatePrintSettingsReply(printer_query, reply_msg);
    return;
  }
  printer_query = queue_->PopPrinterQuery(document_cookie);
  if (!printer_query.get()) {
    printer_query = queue_->CreatePrinterQuery(
        content::ChildProcessHost::kInvalidUniqueID, MSG_ROUTING_NONE);
  }
  printer_query->SetSettings(
      std::move(job_settings),
      base::Bind(&PrintingMessageFilter::OnUpdatePrintSettingsReply, this,
                 printer_query, reply_msg));
}

#if defined(OS_WIN) && BUILDFLAG(ENABLE_PRINT_PREVIEW)
void PrintingMessageFilter::NotifySystemDialogCancelled(int routing_id) {
  PrintViewManager* manager =
      GetPrintViewManager(render_process_id_, routing_id);
  manager->SystemDialogCancelled();
}
#endif

void PrintingMessageFilter::OnUpdatePrintSettingsReply(
    scoped_refptr<PrinterQuery> printer_query,
    IPC::Message* reply_msg) {
  PrintMsg_PrintPages_Params params;
  if (!printer_query.get() ||
      printer_query->last_status() != PrintingContext::OK) {
    params.Reset();
  } else {
    RenderParamsFromPrintSettings(printer_query->settings(), &params.params);
    params.params.document_cookie = printer_query->cookie();
    params.pages = PageRange::GetPages(printer_query->settings().ranges());
  }
  bool canceled = printer_query.get() &&
                  (printer_query->last_status() == PrintingContext::CANCEL);
#if defined(OS_WIN) && BUILDFLAG(ENABLE_PRINT_PREVIEW)
  if (canceled) {
    int routing_id = reply_msg->routing_id();
    base::PostTaskWithTraits(
        FROM_HERE, {BrowserThread::UI},
        base::Bind(&PrintingMessageFilter::NotifySystemDialogCancelled, this,
                   routing_id));
  }
#endif
  PrintHostMsg_UpdatePrintSettings::WriteReplyParams(reply_msg, params,
                                                     canceled);
  Send(reply_msg);
  // If user hasn't cancelled.
  if (printer_query.get()) {
    if (printer_query->cookie() && printer_query->settings().dpi()) {
      queue_->QueuePrinterQuery(printer_query.get());
    } else {
      printer_query->StopWorker();
    }
  }
}

#if BUILDFLAG(ENABLE_PRINT_PREVIEW)
void PrintingMessageFilter::OnCheckForCancel(const PrintHostMsg_PreviewIds& ids,
                                             bool* cancel) {
  *cancel = PrintPreviewUI::ShouldCancelRequest(ids);
}
#endif

}  // namespace printing