/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef __nsWindowWatcher_h__
#define __nsWindowWatcher_h__

// {a21bfa01-f349-4394-a84c-8de5cf0737d0}
#define NS_WINDOWWATCHER_CID \
  {0xa21bfa01, 0xf349, 0x4394, {0xa8, 0x4c, 0x8d, 0xe5, 0xcf, 0x7, 0x37, 0xd0}}

#include "nsCOMPtr.h"
#include "mozilla/Mutex.h"
#include "nsIWindowCreator.h" // for stupid compilers
#include "nsIWindowWatcher.h"
#include "nsIPromptFactory.h"
#include "nsITabParent.h"
#include "nsPIWindowWatcher.h"
#include "nsTArray.h"

class nsIURI;
class nsIDocShellTreeItem;
class nsIDocShellTreeOwner;
class nsPIDOMWindow;
class nsWatcherWindowEnumerator;
class nsPromptService;
struct nsWatcherWindowEntry;
struct SizeSpec;

class nsWindowWatcher
  : public nsIWindowWatcher
  , public nsPIWindowWatcher
  , public nsIPromptFactory
{
  friend class nsWatcherWindowEnumerator;

public:
  nsWindowWatcher();

  nsresult Init();

  NS_DECL_ISUPPORTS

  NS_DECL_NSIWINDOWWATCHER
  NS_DECL_NSPIWINDOWWATCHER
  NS_DECL_NSIPROMPTFACTORY

  static int32_t GetWindowOpenLocation(nsIDOMWindow* aParent,
                                       uint32_t aChromeFlags,
                                       bool aCalledFromJS,
                                       bool aPositionSpecified,
                                       bool aSizeSpecified);

protected:
  virtual ~nsWindowWatcher();

  friend class nsPromptService;
  bool AddEnumerator(nsWatcherWindowEnumerator* aEnumerator);
  bool RemoveEnumerator(nsWatcherWindowEnumerator* aEnumerator);

  nsWatcherWindowEntry* FindWindowEntry(nsIDOMWindow* aWindow);
  nsresult RemoveWindow(nsWatcherWindowEntry* aInfo);

  // Get the caller tree item.  Look on the JS stack, then fall back
  // to the parent if there's nothing there.
  already_AddRefed<nsIDocShellTreeItem> GetCallerTreeItem(
    nsIDocShellTreeItem* aParentItem);

  // Unlike GetWindowByName this will look for a caller on the JS
  // stack, and then fall back on aCurrentWindow if it can't find one.
  nsPIDOMWindow* SafeGetWindowByName(const nsAString& aName,
                                     nsIDOMWindow* aCurrentWindow);

  // Just like OpenWindowJS, but knows whether it got called via OpenWindowJS
  // (which means called from script) or called via OpenWindow.
  nsresult OpenWindowInternal(nsIDOMWindow* aParent,
                              const char* aUrl,
                              const char* aName,
                              const char* aFeatures,
                              bool aCalledFromJS,
                              bool aDialog,
                              bool aNavigate,
                              nsITabParent* aOpeningTab,
                              nsIArray* aArgv,
                              nsIDOMWindow** aResult);

  static nsresult URIfromURL(const char* aURL,
                             nsIDOMWindow* aParent,
                             nsIURI** aURI);

  static uint32_t CalculateChromeFlags(nsIDOMWindow* aParent,
                                       const char* aFeatures,
                                       bool aFeaturesSpecified,
                                       bool aDialog,
                                       bool aChromeURL,
                                       bool aHasChromeParent,
                                       bool aOpenedFromRemoteTab);
  static int32_t WinHasOption(const char* aOptions, const char* aName,
                              int32_t aDefault, bool* aPresenceFlag);
  /* Compute the right SizeSpec based on aFeatures */
  static void CalcSizeSpec(const char* aFeatures, SizeSpec& aResult);
  static nsresult ReadyOpenedDocShellItem(nsIDocShellTreeItem* aOpenedItem,
                                          nsIDOMWindow* aParent,
                                          bool aWindowIsNew,
                                          nsIDOMWindow** aOpenedWindow);
  static void SizeOpenedDocShellItem(nsIDocShellTreeItem* aDocShellItem,
                                     nsIDOMWindow* aParent,
                                     bool aIsCallerChrome,
                                     const SizeSpec& aSizeSpec);
  static void GetWindowTreeItem(nsIDOMWindow* aWindow,
                                nsIDocShellTreeItem** aResult);
  static void GetWindowTreeOwner(nsIDOMWindow* aWindow,
                                 nsIDocShellTreeOwner** aResult);

  nsTArray<nsWatcherWindowEnumerator*> mEnumeratorList;
  nsWatcherWindowEntry* mOldestWindow;
  mozilla::Mutex mListLock;

  nsCOMPtr<nsIWindowCreator> mWindowCreator;
};

#endif
