1 files changed, 187 insertions, 0 deletions
diff --git a/dom/xbl/nsXBLEventHandler.cpp b/dom/xbl/nsXBLEventHandler.cpp
new file mode 100644
index 000000000..6a873cf3b
--- /dev/null
+++ b/dom/xbl/nsXBLEventHandler.cpp
@@ -0,0 +1,187 @@
+/* -*- 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 "nsIAtom.h"
+#include "nsIDOMEventListener.h"
+#include "nsIDOMKeyEvent.h"
+#include "nsIDOMMouseEvent.h"
+#include "nsXBLPrototypeHandler.h"
+#include "nsContentUtils.h"
+#include "mozilla/dom/Event.h" // for nsIDOMEvent::InternalDOMEvent()
+#include "mozilla/dom/EventTarget.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(nsIDOMEvent* aEvent)
+{
+  if (!mProtoHandler)
+    return NS_ERROR_FAILURE;
+
+  uint8_t phase = mProtoHandler->GetPhase();
+  if (phase == NS_PHASE_TARGET) {
+    uint16_t eventPhase;
+    aEvent->GetEventPhase(&eventPhase);
+    if (eventPhase != nsIDOMEvent::AT_TARGET)
+      return NS_OK;
+  }
+
+  if (!EventMatched(aEvent))
+    return NS_OK;
+
+  mProtoHandler->ExecuteHandler(aEvent->InternalDOMEvent()->GetCurrentTarget(),
+                                aEvent);
+
+  return NS_OK;
+}
+
+nsXBLMouseEventHandler::nsXBLMouseEventHandler(nsXBLPrototypeHandler* aHandler)
+  : nsXBLEventHandler(aHandler)
+{
+}
+
+nsXBLMouseEventHandler::~nsXBLMouseEventHandler()
+{
+}
+
+bool
+nsXBLMouseEventHandler::EventMatched(nsIDOMEvent* aEvent)
+{
+  nsCOMPtr<nsIDOMMouseEvent> mouse(do_QueryInterface(aEvent));
+  return mouse && mProtoHandler->MouseEventMatched(mouse);
+}
+
+nsXBLKeyEventHandler::nsXBLKeyEventHandler(nsIAtom* 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(
+                        nsIDOMKeyEvent* aKeyEvent,
+                        uint32_t aCharCode,
+                        const IgnoreModifierState& aIgnoreModifierState)
+{
+  WidgetEvent* event = aKeyEvent->AsEvent()->WidgetEventPtr();
+  nsCOMPtr<EventTarget> target = aKeyEvent->AsEvent()->InternalDOMEvent()->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->AsEvent());
+      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(nsIDOMEvent* aEvent)
+{
+  uint32_t count = mProtoHandlers.Length();
+  if (count == 0)
+    return NS_ERROR_FAILURE;
+
+  if (mPhase == NS_PHASE_TARGET) {
+    uint16_t eventPhase;
+    aEvent->GetEventPhase(&eventPhase);
+    if (eventPhase != nsIDOMEvent::AT_TARGET)
+      return NS_OK;
+  }
+
+  nsCOMPtr<nsIDOMKeyEvent> key(do_QueryInterface(aEvent));
+  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,
+                      nsIAtom* 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();
+}