nsXBLPrototypeHandler.h
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 nsXBLPrototypeHandler_h__
#define nsXBLPrototypeHandler_h__
#include "nsIAtom.h"
#include "nsString.h"
#include "nsCOMPtr.h"
#include "nsIController.h"
#include "nsAutoPtr.h"
#include "nsXBLEventHandler.h"
#include "nsIWeakReference.h"
#include "nsCycleCollectionParticipant.h"
#include "js/TypeDecls.h"
class nsIDOMEvent;
class nsIContent;
class nsIDOMUIEvent;
class nsIDOMKeyEvent;
class nsIDOMMouseEvent;
class nsIObjectInputStream;
class nsIObjectOutputStream;
class nsXBLPrototypeBinding;
namespace mozilla {
namespace dom {
class AutoJSAPI;
class EventTarget;
}
}
#define NS_HANDLER_TYPE_XBL_JS (1 << 0)
#define NS_HANDLER_TYPE_XBL_COMMAND (1 << 1)
#define NS_HANDLER_TYPE_XUL (1 << 2)
#define NS_HANDLER_HAS_ALLOW_UNTRUSTED_ATTR (1 << 4)
#define NS_HANDLER_ALLOW_UNTRUSTED (1 << 5)
#define NS_HANDLER_TYPE_SYSTEM (1 << 6)
#define NS_HANDLER_TYPE_PREVENTDEFAULT (1 << 7)
// XXX Use nsIDOMEvent:: codes?
#define NS_PHASE_CAPTURING 1
#define NS_PHASE_TARGET 2
#define NS_PHASE_BUBBLING 3
namespace mozilla {
namespace dom {
struct IgnoreModifierState
{
// When mShift is true, Shift key state will be ignored.
bool mShift;
// When mOS is true, OS key state will be ignored.
bool mOS;
IgnoreModifierState()
: mShift(false)
, mOS(false)
{
}
};
} // namespace dom
} // namespace mozilla
class nsXBLPrototypeHandler
{
typedef mozilla::dom::IgnoreModifierState IgnoreModifierState;
public:
// This constructor is used by XBL handlers (both the JS and command shorthand variety)
nsXBLPrototypeHandler(const char16_t* aEvent, const char16_t* aPhase,
const char16_t* aAction, const char16_t* aCommand,
const char16_t* aKeyCode, const char16_t* aCharCode,
const char16_t* aModifiers, const char16_t* aButton,
const char16_t* aClickCount, const char16_t* aGroup,
const char16_t* aPreventDefault,
const char16_t* aAllowUntrusted,
nsXBLPrototypeBinding* aBinding,
uint32_t aLineNumber);
// This constructor is used only by XUL key handlers (e.g., <key>)
explicit nsXBLPrototypeHandler(nsIContent* aKeyElement);
// This constructor is used for handlers loaded from the cache
explicit nsXBLPrototypeHandler(nsXBLPrototypeBinding* aBinding);
~nsXBLPrototypeHandler();
// if aCharCode is not zero, it is used instead of the charCode of aKeyEvent.
bool KeyEventMatched(nsIDOMKeyEvent* aKeyEvent,
uint32_t aCharCode,
const IgnoreModifierState& aIgnoreModifierState);
inline bool KeyEventMatched(nsIAtom* aEventType,
nsIDOMKeyEvent* aEvent,
uint32_t aCharCode,
const IgnoreModifierState& aIgnoreModifierState)
{
if (aEventType != mEventName)
return false;
return KeyEventMatched(aEvent, aCharCode, aIgnoreModifierState);
}
bool MouseEventMatched(nsIDOMMouseEvent* aMouseEvent);
inline bool MouseEventMatched(nsIAtom* aEventType,
nsIDOMMouseEvent* aEvent)
{
if (aEventType != mEventName)
return false;
return MouseEventMatched(aEvent);
}
already_AddRefed<nsIContent> GetHandlerElement();
void AppendHandlerText(const nsAString& aText);
uint8_t GetPhase() { return mPhase; }
uint8_t GetType() { return mType; }
nsXBLPrototypeHandler* GetNextHandler() { return mNextHandler; }
void SetNextHandler(nsXBLPrototypeHandler* aHandler) { mNextHandler = aHandler; }
nsresult ExecuteHandler(mozilla::dom::EventTarget* aTarget, nsIDOMEvent* aEvent);
already_AddRefed<nsIAtom> GetEventName();
void SetEventName(nsIAtom* aName) { mEventName = aName; }
nsXBLEventHandler* GetEventHandler()
{
if (!mHandler) {
mHandler = NS_NewXBLEventHandler(this, mEventName);
}
return mHandler;
}
nsXBLEventHandler* GetCachedEventHandler()
{
return mHandler;
}
bool HasAllowUntrustedAttr()
{
return (mType & NS_HANDLER_HAS_ALLOW_UNTRUSTED_ATTR) != 0;
}
// This returns a valid value only if HasAllowUntrustedEventsAttr returns
// true.
bool AllowUntrustedEvents()
{
return (mType & NS_HANDLER_ALLOW_UNTRUSTED) != 0;
}
nsresult Read(nsIObjectInputStream* aStream);
nsresult Write(nsIObjectOutputStream* aStream);
public:
static uint32_t gRefCnt;
protected:
void Init() {
++gRefCnt;
if (gRefCnt == 1)
// Get the primary accelerator key.
InitAccessKeys();
}
already_AddRefed<nsIController> GetController(mozilla::dom::EventTarget* aTarget);
inline int32_t GetMatchingKeyCode(const nsAString& aKeyName);
void ConstructPrototype(nsIContent* aKeyElement,
const char16_t* aEvent=nullptr, const char16_t* aPhase=nullptr,
const char16_t* aAction=nullptr, const char16_t* aCommand=nullptr,
const char16_t* aKeyCode=nullptr, const char16_t* aCharCode=nullptr,
const char16_t* aModifiers=nullptr, const char16_t* aButton=nullptr,
const char16_t* aClickCount=nullptr, const char16_t* aGroup=nullptr,
const char16_t* aPreventDefault=nullptr,
const char16_t* aAllowUntrusted=nullptr);
void ReportKeyConflict(const char16_t* aKey, const char16_t* aModifiers, nsIContent* aElement, const char *aMessageName);
void GetEventType(nsAString& type);
bool ModifiersMatchMask(nsIDOMUIEvent* aEvent,
const IgnoreModifierState& aIgnoreModifierState);
nsresult DispatchXBLCommand(mozilla::dom::EventTarget* aTarget, nsIDOMEvent* aEvent);
nsresult DispatchXULKeyCommand(nsIDOMEvent* aEvent);
nsresult EnsureEventHandler(mozilla::dom::AutoJSAPI& jsapi, nsIAtom* aName,
JS::MutableHandle<JSObject*> aHandler);
static int32_t KeyToMask(int32_t key);
static int32_t AccelKeyMask();
static int32_t kMenuAccessKey;
static void InitAccessKeys();
static const int32_t cShift;
static const int32_t cAlt;
static const int32_t cControl;
static const int32_t cMeta;
static const int32_t cOS;
static const int32_t cShiftMask;
static const int32_t cAltMask;
static const int32_t cControlMask;
static const int32_t cMetaMask;
static const int32_t cOSMask;
static const int32_t cAllModifiers;
protected:
union {
nsIWeakReference* mHandlerElement; // For XUL <key> element handlers. [STRONG]
char16_t* mHandlerText; // For XBL handlers (we don't build an
// element for the <handler>, and instead
// we cache the JS text or command name
// that we should use.
};
uint32_t mLineNumber; // The line number we started at in the XBL file
// The following four values make up 32 bits.
uint8_t mPhase; // The phase (capturing, bubbling)
uint8_t mType; // The type of the handler. The handler is either a XUL key
// handler, an XBL "command" event, or a normal XBL event with
// accompanying JavaScript. The high bit is used to indicate
// whether this handler should prevent the default action.
uint8_t mMisc; // Miscellaneous extra information. For key events,
// stores whether or not we're a key code or char code.
// For mouse events, stores the clickCount.
int32_t mKeyMask; // Which modifier keys this event handler expects to have down
// in order to be matched.
// The primary filter information for mouse/key events.
int32_t mDetail; // For key events, contains a charcode or keycode. For
// mouse events, stores the button info.
// Prototype handlers are chained. We own the next handler in the chain.
nsXBLPrototypeHandler* mNextHandler;
nsCOMPtr<nsIAtom> mEventName; // The type of the event, e.g., "keypress"
nsRefPtr<nsXBLEventHandler> mHandler;
nsXBLPrototypeBinding* mPrototypeBinding; // the binding owns us
};
#endif
