/* -*- 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/. */

#include "nsCOMPtr.h"

#include "nsAtom.h"

#include "nsIDOMEventListener.h"

#include "nsXBLPrototypeHandler.h"

#include "nsContentUtils.h"

#include "mozilla/dom/Event.h" // for Event

#include "mozilla/dom/EventBinding.h" // for Event

#include "mozilla/dom/EventTarget.h"

#include "mozilla/dom/KeyboardEvent.h"

#include "mozilla/TextEvents.h"

using namespace mozilla;

using namespace mozilla::dom;

nsXBLEventHandler::nsXBLEventHandler(nsXBLPrototypeHandler* aHandler)

  : mProtoHandler(aHandler)

{

}

nsXBLEventHandler::~nsXBLEventHandler()

{

}

NS_IMPL_ISUPPORTS(nsXBLEventHandler, nsIDOMEventListener)

NS_IMETHODIMP

nsXBLEventHandler::HandleEvent(Event* aEvent)

{

  if (!mProtoHandler)

    return NS_ERROR_FAILURE;

  uint8_t phase = mProtoHandler->GetPhase();

  if (phase == NS_PHASE_TARGET) {

    if (aEvent->EventPhase() != Event_Binding::AT_TARGET) {

      return NS_OK;

    }

  }

  if (!EventMatched(aEvent))

    return NS_OK;

  mProtoHandler->ExecuteHandler(aEvent->GetCurrentTarget(), aEvent);

  return NS_OK;

}

nsXBLMouseEventHandler::nsXBLMouseEventHandler(nsXBLPrototypeHandler* aHandler)

  : nsXBLEventHandler(aHandler)

{

}

nsXBLMouseEventHandler::~nsXBLMouseEventHandler()

{

}

bool

nsXBLMouseEventHandler::EventMatched(Event* aEvent)

{

  MouseEvent* mouse = aEvent->AsMouseEvent();

  return mouse && mProtoHandler->MouseEventMatched(mouse);

}

nsXBLKeyEventHandler::nsXBLKeyEventHandler(nsAtom* aEventType, uint8_t aPhase,

                                           uint8_t aType)

  : mEventType(aEventType),

    mPhase(aPhase),

    mType(aType),

    mIsBoundToChrome(false),

    mUsingContentXBLScope(false)

{

}

nsXBLKeyEventHandler::~nsXBLKeyEventHandler()

{

}

NS_IMPL_ISUPPORTS(nsXBLKeyEventHandler, nsIDOMEventListener)

bool

nsXBLKeyEventHandler::ExecuteMatchedHandlers(

                        KeyboardEvent* aKeyEvent,

                        uint32_t aCharCode,

                        const IgnoreModifierState& aIgnoreModifierState)

{

  WidgetEvent* event = aKeyEvent->WidgetEventPtr();

  nsCOMPtr<EventTarget> target = aKeyEvent->GetCurrentTarget();

  bool executed = false;

  for (uint32_t i = 0; i < mProtoHandlers.Length(); ++i) {

    nsXBLPrototypeHandler* handler = mProtoHandlers[i];

    bool hasAllowUntrustedAttr = handler->HasAllowUntrustedAttr();

    if ((event->IsTrusted() ||

        (hasAllowUntrustedAttr && handler->AllowUntrustedEvents()) ||

        (!hasAllowUntrustedAttr && !mIsBoundToChrome && !mUsingContentXBLScope)) &&

        handler->KeyEventMatched(aKeyEvent, aCharCode, aIgnoreModifierState)) {

      handler->ExecuteHandler(target, aKeyEvent);

      executed = true;

    }

  }

#ifdef XP_WIN

  // Windows native applications ignore Windows-Logo key state when checking

  // shortcut keys even if the key is pressed.  Therefore, if there is no

  // shortcut key which exactly matches current modifier state, we should

  // retry to look for a shortcut key without the Windows-Logo key press.

  if (!executed && !aIgnoreModifierState.mOS) {

    WidgetKeyboardEvent* keyEvent = event->AsKeyboardEvent();

    if (keyEvent && keyEvent->IsOS()) {

      IgnoreModifierState ignoreModifierState(aIgnoreModifierState);

      ignoreModifierState.mOS = true;

      return ExecuteMatchedHandlers(aKeyEvent, aCharCode, ignoreModifierState);

    }

  }

#endif

  return executed;

}

NS_IMETHODIMP

nsXBLKeyEventHandler::HandleEvent(Event* aEvent)

{

  uint32_t count = mProtoHandlers.Length();

  if (count == 0)

    return NS_ERROR_FAILURE;

  if (mPhase == NS_PHASE_TARGET) {

    if (aEvent->EventPhase() != Event_Binding::AT_TARGET) {

      return NS_OK;

    }

  }

  RefPtr<KeyboardEvent> key = aEvent->AsKeyboardEvent();

  if (!key) {

    return NS_OK;

  }

  WidgetKeyboardEvent* nativeKeyboardEvent =

    aEvent->WidgetEventPtr()->AsKeyboardEvent();

  MOZ_ASSERT(nativeKeyboardEvent);

  AutoShortcutKeyCandidateArray shortcutKeys;

  nativeKeyboardEvent->GetShortcutKeyCandidates(shortcutKeys);

  if (shortcutKeys.IsEmpty()) {

    ExecuteMatchedHandlers(key, 0, IgnoreModifierState());

    return NS_OK;

  }

  for (uint32_t i = 0; i < shortcutKeys.Length(); ++i) {

    IgnoreModifierState ignoreModifierState;

    ignoreModifierState.mShift = shortcutKeys[i].mIgnoreShift;

    if (ExecuteMatchedHandlers(key, shortcutKeys[i].mCharCode,

                               ignoreModifierState)) {

      return NS_OK;

    }

  }

  return NS_OK;

}

///////////////////////////////////////////////////////////////////////////////////

already_AddRefed<nsXBLEventHandler>

NS_NewXBLEventHandler(nsXBLPrototypeHandler* aHandler,

                      nsAtom* aEventType)

{

  RefPtr<nsXBLEventHandler> handler;

  switch (nsContentUtils::GetEventClassID(nsDependentAtomString(aEventType))) {

    case eDragEventClass:

    case eMouseEventClass:

    case eMouseScrollEventClass:

    case eWheelEventClass:

    case eSimpleGestureEventClass:

      handler = new nsXBLMouseEventHandler(aHandler);

      break;

    default:

      handler = new nsXBLEventHandler(aHandler);

      break;

  }

  return handler.forget();

}