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gecko-dev/dom/xbl/nsXBLPrototypeHandler.cpp

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/* -*- 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 "mozilla/ArrayUtils.h"
#include "nsCOMPtr.h"
#include "nsQueryObject.h"
#include "nsXBLPrototypeHandler.h"
#include "nsXBLPrototypeBinding.h"
#include "nsContentUtils.h"
#include "nsGlobalWindow.h"
#include "nsGlobalWindowCommands.h"
#include "nsIContent.h"
#include "nsAtom.h"
#include "nsNameSpaceManager.h"
#include "mozilla/dom/Document.h"
#include "nsIController.h"
#include "nsIControllers.h"
#include "nsXULElement.h"
#include "nsIURI.h"
#include "nsFocusManager.h"
#include "nsIFormControl.h"
#include "nsIDOMEventListener.h"
#include "nsPIDOMWindow.h"
#include "nsPIWindowRoot.h"
#include "nsIDOMWindow.h"
#include "nsIServiceManager.h"
#include "nsIScriptError.h"
#include "nsIWeakReferenceUtils.h"
#include "nsString.h"
#include "nsReadableUtils.h"
#include "nsGkAtoms.h"
#include "nsIXPConnect.h"
#include "nsDOMCID.h"
#include "nsUnicharUtils.h"
#include "nsCRT.h"
#include "nsXBLEventHandler.h"
#include "nsXBLSerialize.h"
#include "nsJSUtils.h"
#include "mozilla/BasicEvents.h"
#include "mozilla/JSEventHandler.h"
#include "mozilla/Preferences.h"
#include "mozilla/TextEvents.h"
#include "mozilla/dom/Element.h"
#include "mozilla/dom/Event.h"
#include "mozilla/dom/EventHandlerBinding.h"
#include "mozilla/dom/HTMLInputElement.h"
#include "mozilla/dom/HTMLTextAreaElement.h"
#include "mozilla/dom/KeyboardEvent.h"
#include "mozilla/dom/KeyboardEventBinding.h"
#include "mozilla/dom/MouseEvent.h"
#include "mozilla/dom/ScriptSettings.h"
#include "mozilla/layers/KeyboardMap.h"
#include "xpcpublic.h"
using namespace mozilla;
using namespace mozilla::dom;
using namespace mozilla::layers;
uint32_t nsXBLPrototypeHandler::gRefCnt = 0;
int32_t nsXBLPrototypeHandler::kMenuAccessKey = -1;
const int32_t nsXBLPrototypeHandler::cShift = (1 << 0);
const int32_t nsXBLPrototypeHandler::cAlt = (1 << 1);
const int32_t nsXBLPrototypeHandler::cControl = (1 << 2);
const int32_t nsXBLPrototypeHandler::cMeta = (1 << 3);
const int32_t nsXBLPrototypeHandler::cOS = (1 << 4);
const int32_t nsXBLPrototypeHandler::cShiftMask = (1 << 5);
const int32_t nsXBLPrototypeHandler::cAltMask = (1 << 6);
const int32_t nsXBLPrototypeHandler::cControlMask = (1 << 7);
const int32_t nsXBLPrototypeHandler::cMetaMask = (1 << 8);
const int32_t nsXBLPrototypeHandler::cOSMask = (1 << 9);
const int32_t nsXBLPrototypeHandler::cAllModifiers =
cShiftMask | cAltMask | cControlMask | cMetaMask | cOSMask;
nsXBLPrototypeHandler::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)
: mHandlerText(nullptr),
mLineNumber(aLineNumber),
mReserved(XBLReservedKey_False),
mNextHandler(nullptr),
mPrototypeBinding(aBinding) {
Init();
ConstructPrototype(nullptr, aEvent, aPhase, aAction, aCommand, aKeyCode,
aCharCode, aModifiers, aButton, aClickCount, aGroup,
aPreventDefault, aAllowUntrusted);
}
nsXBLPrototypeHandler::nsXBLPrototypeHandler(Element* aHandlerElement,
XBLReservedKey aReserved)
: mHandlerElement(nullptr),
mLineNumber(0),
mReserved(aReserved),
mNextHandler(nullptr),
mPrototypeBinding(nullptr) {
Init();
// Make sure our prototype is initialized.
ConstructPrototype(aHandlerElement);
}
nsXBLPrototypeHandler::nsXBLPrototypeHandler(ShortcutKeyData* aKeyData)
: mHandlerText(nullptr),
mLineNumber(0),
mReserved(XBLReservedKey_False),
mNextHandler(nullptr),
mPrototypeBinding(nullptr) {
Init();
ConstructPrototype(nullptr, aKeyData->event, nullptr, nullptr,
aKeyData->command, aKeyData->keycode, aKeyData->key,
aKeyData->modifiers, nullptr, nullptr, nullptr, nullptr,
nullptr);
}
nsXBLPrototypeHandler::nsXBLPrototypeHandler(nsXBLPrototypeBinding* aBinding)
: mHandlerText(nullptr),
mLineNumber(0),
mPhase(0),
mType(0),
mMisc(0),
mReserved(XBLReservedKey_False),
mKeyMask(0),
mDetail(0),
mNextHandler(nullptr),
mPrototypeBinding(aBinding) {
Init();
}
nsXBLPrototypeHandler::~nsXBLPrototypeHandler() {
--gRefCnt;
if (mType & NS_HANDLER_TYPE_XUL) {
NS_IF_RELEASE(mHandlerElement);
} else if (mHandlerText) {
free(mHandlerText);
}
// We own the next handler in the chain, so delete it now.
NS_CONTENT_DELETE_LIST_MEMBER(nsXBLPrototypeHandler, this, mNextHandler);
}
bool nsXBLPrototypeHandler::TryConvertToKeyboardShortcut(
KeyboardShortcut* aOut) const {
// Convert the event type
KeyboardInput::KeyboardEventType eventType;
if (mEventName == nsGkAtoms::keydown) {
eventType = KeyboardInput::KEY_DOWN;
} else if (mEventName == nsGkAtoms::keypress) {
eventType = KeyboardInput::KEY_PRESS;
} else if (mEventName == nsGkAtoms::keyup) {
eventType = KeyboardInput::KEY_UP;
} else {
return false;
}
// Convert the modifiers
Modifiers modifiersMask = GetModifiersMask();
Modifiers modifiers = GetModifiers();
// Mask away any bits that won't be compared
modifiers &= modifiersMask;
// Convert the keyCode or charCode
uint32_t keyCode;
uint32_t charCode;
if (mMisc) {
keyCode = 0;
charCode = static_cast<uint32_t>(mDetail);
} else {
keyCode = static_cast<uint32_t>(mDetail);
charCode = 0;
}
NS_LossyConvertUTF16toASCII commandText(mHandlerText);
KeyboardScrollAction action;
if (!nsGlobalWindowCommands::FindScrollCommand(commandText.get(), &action)) {
// This action doesn't represent a scroll so we need to create a dispatch
// to content keyboard shortcut so APZ handles this command correctly
*aOut = KeyboardShortcut(eventType, keyCode, charCode, modifiers,
modifiersMask);
return true;
}
// This prototype is a command which represents a scroll action, so create
// a keyboard shortcut to handle it
*aOut = KeyboardShortcut(eventType, keyCode, charCode, modifiers,
modifiersMask, action);
return true;
}
already_AddRefed<Element> nsXBLPrototypeHandler::GetHandlerElement() {
if (mType & NS_HANDLER_TYPE_XUL) {
nsCOMPtr<Element> element = do_QueryReferent(mHandlerElement);
return element.forget();
}
return nullptr;
}
void nsXBLPrototypeHandler::AppendHandlerText(const nsAString& aText) {
if (mHandlerText) {
// Append our text to the existing text.
char16_t* temp = mHandlerText;
mHandlerText = ToNewUnicode(nsDependentString(temp) + aText);
free(temp);
} else {
mHandlerText = ToNewUnicode(aText);
}
}
/////////////////////////////////////////////////////////////////////////////
// Get the menu access key from prefs.
// XXX Eventually pick up using CSS3 key-equivalent property or somesuch
void nsXBLPrototypeHandler::InitAccessKeys() {
if (kMenuAccessKey >= 0) {
return;
}
// Compiled-in defaults, in case we can't get the pref --
// mac doesn't have menu shortcuts, other platforms use alt.
#ifdef XP_MACOSX
kMenuAccessKey = 0;
#else
kMenuAccessKey = KeyboardEvent_Binding::DOM_VK_ALT;
#endif
// Get the menu access key value from prefs, overriding the default:
kMenuAccessKey = Preferences::GetInt("ui.key.menuAccessKey", kMenuAccessKey);
}
nsresult nsXBLPrototypeHandler::ExecuteHandler(EventTarget* aTarget,
Event* aEvent) {
nsresult rv = NS_ERROR_FAILURE;
// Prevent default action?
if (mType & NS_HANDLER_TYPE_PREVENTDEFAULT) {
aEvent->PreventDefault();
// If we prevent default, then it's okay for
// mHandlerElement and mHandlerText to be null
rv = NS_OK;
}
if (!mHandlerElement) // This works for both types of handlers. In both
// cases, the union's var should be defined.
return rv;
// See if our event receiver is a content node (and not us).
bool isXULKey = !!(mType & NS_HANDLER_TYPE_XUL);
bool isXBLCommand = !!(mType & NS_HANDLER_TYPE_XBL_COMMAND);
NS_ASSERTION(!(isXULKey && isXBLCommand),
"can't be both a key and xbl command handler");
// XUL handlers and commands shouldn't be triggered by non-trusted
// events.
if (isXULKey || isXBLCommand) {
if (!aEvent->IsTrusted()) return NS_OK;
}
if (isXBLCommand) {
return DispatchXBLCommand(aTarget, aEvent);
}
// If we're executing on a XUL key element, just dispatch a command
// event at the element. It will take care of retargeting it to its
// command element, if applicable, and executing the event handler.
if (isXULKey) {
return DispatchXULKeyCommand(aEvent);
}
// Look for a compiled handler on the element.
// Should be compiled and bound with "on" in front of the name.
RefPtr<nsAtom> onEventAtom = NS_Atomize(NS_LITERAL_STRING("onxbl") +
nsDependentAtomString(mEventName));
// Compile the handler and bind it to the element.
nsCOMPtr<nsIScriptGlobalObject> boundGlobal;
nsCOMPtr<nsPIWindowRoot> winRoot = do_QueryInterface(aTarget);
if (winRoot) {
if (nsCOMPtr<nsPIDOMWindowOuter> window = winRoot->GetWindow()) {
NS_ENSURE_TRUE(window->GetCurrentInnerWindow(), NS_ERROR_UNEXPECTED);
boundGlobal = do_QueryInterface(window->GetPrivateRoot());
}
} else
boundGlobal = do_QueryInterface(aTarget);
if (!boundGlobal) {
nsCOMPtr<Document> boundDocument(do_QueryInterface(aTarget));
if (!boundDocument) {
// We must be an element.
nsCOMPtr<nsIContent> content(do_QueryInterface(aTarget));
if (!content) return NS_OK;
boundDocument = content->OwnerDoc();
}
boundGlobal = do_QueryInterface(boundDocument->GetScopeObject());
}
if (!boundGlobal) return NS_OK;
nsISupports* scriptTarget;
if (winRoot) {
scriptTarget = boundGlobal;
} else {
scriptTarget = aTarget;
}
// We're about to create a new JSEventHandler, which means that we need to
// Initiatize an AutoJSAPI with aTarget's bound global to make sure any errors
// are reported to the correct place.
AutoJSAPI jsapi;
if (NS_WARN_IF(!jsapi.Init(boundGlobal))) {
return NS_OK;
}
JSContext* cx = jsapi.cx();
JS::Rooted<JSObject*> handler(cx);
rv = EnsureEventHandler(jsapi, onEventAtom, &handler);
NS_ENSURE_SUCCESS(rv, rv);
JS::Rooted<JSObject*> scopeObject(
cx, xpc::GetXBLScopeOrGlobal(cx, boundGlobal->GetGlobalJSObject()));
NS_ENSURE_TRUE(scopeObject, NS_ERROR_OUT_OF_MEMORY);
// Bind it to the bound element. Note that if we're using a separate XBL
// scope, we'll actually be binding the event handler to a cross-compartment
// wrapper to the bound element's reflector.
// First, enter our XBL scope. This is where the generic handler should have
// been compiled, above.
JSAutoRealm ar(cx, scopeObject);
JS::Rooted<JSObject*> genericHandler(cx, handler.get());
bool ok = JS_WrapObject(cx, &genericHandler);
NS_ENSURE_TRUE(ok, NS_ERROR_OUT_OF_MEMORY);
MOZ_ASSERT(!js::IsCrossCompartmentWrapper(genericHandler));
// Build a scope chain in the XBL scope.
RefPtr<Element> targetElement = do_QueryObject(scriptTarget);
JS::AutoObjectVector scopeChain(cx);
ok = nsJSUtils::GetScopeChainForXBL(cx, targetElement, *mPrototypeBinding,
scopeChain);
NS_ENSURE_TRUE(ok, NS_ERROR_OUT_OF_MEMORY);
// Next, clone the generic handler with our desired scope chain.
JS::Rooted<JSObject*> bound(
cx, JS::CloneFunctionObject(cx, genericHandler, scopeChain));
NS_ENSURE_TRUE(bound, NS_ERROR_FAILURE);
RefPtr<EventHandlerNonNull> handlerCallback = new EventHandlerNonNull(
static_cast<JSContext*>(nullptr), bound, scopeObject,
/* aIncumbentGlobal = */ nullptr);
TypedEventHandler typedHandler(handlerCallback);
// Execute it.
nsCOMPtr<JSEventHandler> jsEventHandler;
rv = NS_NewJSEventHandler(scriptTarget, onEventAtom, typedHandler,
getter_AddRefs(jsEventHandler));
NS_ENSURE_SUCCESS(rv, rv);
// Handle the event.
jsEventHandler->HandleEvent(aEvent);
jsEventHandler->Disconnect();
return NS_OK;
}
nsresult nsXBLPrototypeHandler::EnsureEventHandler(
AutoJSAPI& jsapi, nsAtom* aName, JS::MutableHandle<JSObject*> aHandler) {
JSContext* cx = jsapi.cx();
// Check to see if we've already compiled this
JS::Rooted<JSObject*> globalObject(cx, JS::CurrentGlobalOrNull(cx));
nsCOMPtr<nsPIDOMWindowInner> pWindow =
xpc::WindowOrNull(globalObject)->AsInner();
if (pWindow) {
JS::Rooted<JSObject*> cachedHandler(
cx, pWindow->GetCachedXBLPrototypeHandler(this));
if (cachedHandler) {
JS::ExposeObjectToActiveJS(cachedHandler);
aHandler.set(cachedHandler);
NS_ENSURE_TRUE(aHandler, NS_ERROR_FAILURE);
return NS_OK;
}
}
// Ensure that we have something to compile
nsDependentString handlerText(mHandlerText);
NS_ENSURE_TRUE(!handlerText.IsEmpty(), NS_ERROR_FAILURE);
JS::Rooted<JSObject*> scopeObject(cx,
xpc::GetXBLScopeOrGlobal(cx, globalObject));
NS_ENSURE_TRUE(scopeObject, NS_ERROR_OUT_OF_MEMORY);
nsAutoCString bindingURI;
nsresult rv = mPrototypeBinding->DocURI()->GetSpec(bindingURI);
NS_ENSURE_SUCCESS(rv, rv);
uint32_t argCount;
const char** argNames;
nsContentUtils::GetEventArgNames(kNameSpaceID_XBL, aName, false, &argCount,
&argNames);
// Compile the event handler in the xbl scope.
JSAutoRealm ar(cx, scopeObject);
JS::CompileOptions options(cx);
options.setFileAndLine(bindingURI.get(), mLineNumber);
JS::Rooted<JSObject*> handlerFun(cx);
JS::AutoObjectVector emptyVector(cx);
rv = nsJSUtils::CompileFunction(jsapi, emptyVector, options,
nsAtomCString(aName), argCount, argNames,
handlerText, handlerFun.address());
NS_ENSURE_SUCCESS(rv, rv);
NS_ENSURE_TRUE(handlerFun, NS_ERROR_FAILURE);
// Wrap the handler into the content scope, since we're about to stash it
// on the DOM window and such.
JSAutoRealm ar2(cx, globalObject);
bool ok = JS_WrapObject(cx, &handlerFun);
NS_ENSURE_TRUE(ok, NS_ERROR_OUT_OF_MEMORY);
aHandler.set(handlerFun);
NS_ENSURE_TRUE(aHandler, NS_ERROR_FAILURE);
if (pWindow) {
pWindow->CacheXBLPrototypeHandler(this, aHandler);
}
return NS_OK;
}
nsresult nsXBLPrototypeHandler::DispatchXBLCommand(EventTarget* aTarget,
Event* aEvent) {
// This is a special-case optimization to make command handling fast.
// It isn't really a part of XBL, but it helps speed things up.
if (aEvent) {
// See if preventDefault has been set. If so, don't execute.
if (aEvent->DefaultPrevented()) {
return NS_OK;
}
bool dispatchStopped = aEvent->IsDispatchStopped();
if (dispatchStopped) {
return NS_OK;
}
}
// Instead of executing JS, let's get the controller for the bound
// element and call doCommand on it.
nsCOMPtr<nsIController> controller;
nsCOMPtr<nsPIDOMWindowOuter> privateWindow;
nsCOMPtr<nsPIWindowRoot> windowRoot = do_QueryInterface(aTarget);
if (windowRoot) {
privateWindow = windowRoot->GetWindow();
} else {
privateWindow = do_QueryInterface(aTarget);
if (!privateWindow) {
nsCOMPtr<nsIContent> elt(do_QueryInterface(aTarget));
nsCOMPtr<Document> doc;
// XXXbz sXBL/XBL2 issue -- this should be the "scope doc" or
// something... whatever we use when wrapping DOM nodes
// normally. It's not clear that the owner doc is the right
// thing.
if (elt) doc = elt->OwnerDoc();
if (!doc) doc = do_QueryInterface(aTarget);
if (!doc) return NS_ERROR_FAILURE;
privateWindow = doc->GetWindow();
if (!privateWindow) return NS_ERROR_FAILURE;
}
windowRoot = privateWindow->GetTopWindowRoot();
}
NS_LossyConvertUTF16toASCII command(mHandlerText);
if (windowRoot) {
// If user tries to do something, user must try to do it in visible window.
// So, let's retrieve controller of visible window.
windowRoot->GetControllerForCommand(command.get(), true,
getter_AddRefs(controller));
} else {
controller =
GetController(aTarget); // We're attached to the receiver possibly.
}
// We are the default action for this command.
// Stop any other default action from executing.
aEvent->PreventDefault();
if (mEventName == nsGkAtoms::keypress &&
mDetail == KeyboardEvent_Binding::DOM_VK_SPACE && mMisc == 1) {
// get the focused element so that we can pageDown only at
// certain times.
nsCOMPtr<nsPIDOMWindowOuter> windowToCheck;
if (windowRoot)
windowToCheck = windowRoot->GetWindow();
else
windowToCheck = privateWindow->GetPrivateRoot();
nsCOMPtr<nsIContent> focusedContent;
if (windowToCheck) {
nsCOMPtr<nsPIDOMWindowOuter> focusedWindow;
focusedContent = nsFocusManager::GetFocusedDescendant(
windowToCheck, nsFocusManager::eIncludeAllDescendants,
getter_AddRefs(focusedWindow));
}
// If the focus is in an editable region, don't scroll.
if (focusedContent && focusedContent->IsEditable()) {
return NS_OK;
}
// If the focus is in a form control, don't scroll.
for (nsIContent* c = focusedContent; c; c = c->GetParent()) {
nsCOMPtr<nsIFormControl> formControl = do_QueryInterface(c);
if (formControl) {
return NS_OK;
}
}
}
if (controller) controller->DoCommand(command.get());
return NS_OK;
}
nsresult nsXBLPrototypeHandler::DispatchXULKeyCommand(Event* aEvent) {
nsCOMPtr<Element> handlerElement = GetHandlerElement();
NS_ENSURE_STATE(handlerElement);
if (handlerElement->AttrValueIs(kNameSpaceID_None, nsGkAtoms::disabled,
nsGkAtoms::_true, eCaseMatters)) {
// Don't dispatch command events for disabled keys.
return NS_OK;
}
aEvent->PreventDefault();
// Copy the modifiers from the key event.
RefPtr<KeyboardEvent> keyEvent = aEvent->AsKeyboardEvent();
if (!keyEvent) {
NS_ERROR("Trying to execute a key handler for a non-key event!");
return NS_ERROR_FAILURE;
}
// XXX We should use mozilla::Modifiers for supporting all modifiers.
bool isAlt = keyEvent->AltKey();
bool isControl = keyEvent->CtrlKey();
bool isShift = keyEvent->ShiftKey();
bool isMeta = keyEvent->MetaKey();
nsContentUtils::DispatchXULCommand(handlerElement, true, nullptr, nullptr,
isControl, isAlt, isShift, isMeta);
return NS_OK;
}
Modifiers nsXBLPrototypeHandler::GetModifiers() const {
Modifiers modifiers = 0;
if (mKeyMask & cMeta) {
modifiers |= MODIFIER_META;
}
if (mKeyMask & cOS) {
modifiers |= MODIFIER_OS;
}
if (mKeyMask & cShift) {
modifiers |= MODIFIER_SHIFT;
}
if (mKeyMask & cAlt) {
modifiers |= MODIFIER_ALT;
}
if (mKeyMask & cControl) {
modifiers |= MODIFIER_CONTROL;
}
return modifiers;
}
Modifiers nsXBLPrototypeHandler::GetModifiersMask() const {
Modifiers modifiersMask = 0;
if (mKeyMask & cMetaMask) {
modifiersMask |= MODIFIER_META;
}
if (mKeyMask & cOSMask) {
modifiersMask |= MODIFIER_OS;
}
if (mKeyMask & cShiftMask) {
modifiersMask |= MODIFIER_SHIFT;
}
if (mKeyMask & cAltMask) {
modifiersMask |= MODIFIER_ALT;
}
if (mKeyMask & cControlMask) {
modifiersMask |= MODIFIER_CONTROL;
}
return modifiersMask;
}
already_AddRefed<nsAtom> nsXBLPrototypeHandler::GetEventName() {
RefPtr<nsAtom> eventName = mEventName;
return eventName.forget();
}
already_AddRefed<nsIController> nsXBLPrototypeHandler::GetController(
EventTarget* aTarget) {
// XXX Fix this so there's a generic interface that describes controllers,
// This code should have no special knowledge of what objects might have
// controllers.
nsCOMPtr<nsIControllers> controllers;
nsCOMPtr<nsIContent> targetContent(do_QueryInterface(aTarget));
RefPtr<nsXULElement> xulElement = nsXULElement::FromNodeOrNull(targetContent);
if (xulElement) {
controllers = xulElement->GetControllers(IgnoreErrors());
}
if (!controllers) {
HTMLTextAreaElement* htmlTextArea =
HTMLTextAreaElement::FromNode(targetContent);
if (htmlTextArea) htmlTextArea->GetControllers(getter_AddRefs(controllers));
}
if (!controllers) {
HTMLInputElement* htmlInputElement =
HTMLInputElement::FromNode(targetContent);
if (htmlInputElement)
htmlInputElement->GetControllers(getter_AddRefs(controllers));
}
if (!controllers) {
nsCOMPtr<nsPIDOMWindowOuter> domWindow(do_QueryInterface(aTarget));
if (domWindow) {
domWindow->GetControllers(getter_AddRefs(controllers));
}
}
// Return the first controller.
// XXX This code should be checking the command name and using supportscommand
// and iscommandenabled.
nsCOMPtr<nsIController> controller;
if (controllers) {
controllers->GetControllerAt(0, getter_AddRefs(controller));
}
return controller.forget();
}
bool nsXBLPrototypeHandler::KeyEventMatched(
KeyboardEvent* aKeyEvent, uint32_t aCharCode,
const IgnoreModifierState& aIgnoreModifierState) {
if (mDetail != -1) {
// Get the keycode or charcode of the key event.
uint32_t code;
if (mMisc) {
if (aCharCode)
code = aCharCode;
else
code = aKeyEvent->CharCode();
if (IS_IN_BMP(code)) code = ToLowerCase(char16_t(code));
} else
code = aKeyEvent->KeyCode();
if (code != uint32_t(mDetail)) return false;
}
return ModifiersMatchMask(aKeyEvent, aIgnoreModifierState);
}
bool nsXBLPrototypeHandler::MouseEventMatched(MouseEvent* aMouseEvent) {
if (mDetail == -1 && mMisc == 0 && (mKeyMask & cAllModifiers) == 0)
return true; // No filters set up. It's generic.
if (mDetail != -1 && (aMouseEvent->Button() != mDetail)) {
return false;
}
if (mMisc != 0 && (aMouseEvent->Detail() != mMisc)) {
return false;
}
return ModifiersMatchMask(aMouseEvent, IgnoreModifierState());
}
struct keyCodeData {
const char* str;
uint16_t strlength;
uint16_t keycode;
};
// All of these must be uppercase, since the function below does
// case-insensitive comparison by converting to uppercase.
// XXX: be sure to check this periodically for new symbol additions!
static const keyCodeData gKeyCodes[] = {
#define NS_DEFINE_VK(aDOMKeyName, aDOMKeyCode) \
{#aDOMKeyName, sizeof(#aDOMKeyName) - 1, aDOMKeyCode},
#include "mozilla/VirtualKeyCodeList.h"
#undef NS_DEFINE_VK
{nullptr, 0, 0}};
int32_t nsXBLPrototypeHandler::GetMatchingKeyCode(const nsAString& aKeyName) {
nsAutoCString keyName;
LossyCopyUTF16toASCII(aKeyName, keyName);
ToUpperCase(keyName); // We want case-insensitive comparison with data
// stored as uppercase.
uint32_t keyNameLength = keyName.Length();
const char* keyNameStr = keyName.get();
for (uint16_t i = 0; i < ArrayLength(gKeyCodes) - 1; ++i) {
if (keyNameLength == gKeyCodes[i].strlength &&
!nsCRT::strcmp(gKeyCodes[i].str, keyNameStr)) {
return gKeyCodes[i].keycode;
}
}
return 0;
}
int32_t nsXBLPrototypeHandler::KeyToMask(int32_t key) {
switch (key) {
case KeyboardEvent_Binding::DOM_VK_META:
return cMeta | cMetaMask;
case KeyboardEvent_Binding::DOM_VK_WIN:
return cOS | cOSMask;
case KeyboardEvent_Binding::DOM_VK_ALT:
return cAlt | cAltMask;
case KeyboardEvent_Binding::DOM_VK_CONTROL:
default:
return cControl | cControlMask;
}
return cControl | cControlMask; // for warning avoidance
}
// static
int32_t nsXBLPrototypeHandler::AccelKeyMask() {
switch (WidgetInputEvent::AccelModifier()) {
case MODIFIER_ALT:
return KeyToMask(KeyboardEvent_Binding::DOM_VK_ALT);
case MODIFIER_CONTROL:
return KeyToMask(KeyboardEvent_Binding::DOM_VK_CONTROL);
case MODIFIER_META:
return KeyToMask(KeyboardEvent_Binding::DOM_VK_META);
case MODIFIER_OS:
return KeyToMask(KeyboardEvent_Binding::DOM_VK_WIN);
default:
MOZ_CRASH("Handle the new result of WidgetInputEvent::AccelModifier()");
return 0;
}
}
void nsXBLPrototypeHandler::GetEventType(nsAString& aEvent) {
nsCOMPtr<Element> handlerElement = GetHandlerElement();
if (!handlerElement) {
aEvent.Truncate();
return;
}
handlerElement->GetAttr(kNameSpaceID_None, nsGkAtoms::event, aEvent);
if (aEvent.IsEmpty() && (mType & NS_HANDLER_TYPE_XUL))
// If no type is specified for a XUL <key> element, let's assume that we're
// "keypress".
aEvent.AssignLiteral("keypress");
}
void nsXBLPrototypeHandler::ConstructPrototype(
Element* aKeyElement, 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) {
mType = 0;
if (aKeyElement) {
mType |= NS_HANDLER_TYPE_XUL;
MOZ_ASSERT(!mPrototypeBinding);
nsWeakPtr weak = do_GetWeakReference(aKeyElement);
if (!weak) {
return;
}
weak.swap(mHandlerElement);
} else {
mType |= aCommand ? NS_HANDLER_TYPE_XBL_COMMAND : NS_HANDLER_TYPE_XBL_JS;
mHandlerText = nullptr;
}
mDetail = -1;
mMisc = 0;
mKeyMask = 0;
mPhase = NS_PHASE_BUBBLING;
if (aAction)
mHandlerText = ToNewUnicode(nsDependentString(aAction));
else if (aCommand)
mHandlerText = ToNewUnicode(nsDependentString(aCommand));
nsAutoString event(aEvent);
if (event.IsEmpty()) {
if (mType & NS_HANDLER_TYPE_XUL) GetEventType(event);
if (event.IsEmpty()) return;
}
mEventName = NS_Atomize(event);
if (aPhase) {
const nsDependentString phase(aPhase);
if (phase.EqualsLiteral("capturing"))
mPhase = NS_PHASE_CAPTURING;
else if (phase.EqualsLiteral("target"))
mPhase = NS_PHASE_TARGET;
}
// Button and clickcount apply only to XBL handlers and don't apply to XUL key
// handlers.
if (aButton && *aButton) mDetail = *aButton - '0';
if (aClickCount && *aClickCount) mMisc = *aClickCount - '0';
// Modifiers are supported by both types of handlers (XUL and XBL).
nsAutoString modifiers(aModifiers);
if (mType & NS_HANDLER_TYPE_XUL)
aKeyElement->GetAttr(kNameSpaceID_None, nsGkAtoms::modifiers, modifiers);
if (!modifiers.IsEmpty()) {
mKeyMask = cAllModifiers;
char* str = ToNewCString(modifiers);
char* newStr;
char* token = nsCRT::strtok(str, ", \t", &newStr);
while (token != nullptr) {
if (PL_strcmp(token, "shift") == 0)
mKeyMask |= cShift | cShiftMask;
else if (PL_strcmp(token, "alt") == 0)
mKeyMask |= cAlt | cAltMask;
else if (PL_strcmp(token, "meta") == 0)
mKeyMask |= cMeta | cMetaMask;
else if (PL_strcmp(token, "os") == 0)
mKeyMask |= cOS | cOSMask;
else if (PL_strcmp(token, "control") == 0)
mKeyMask |= cControl | cControlMask;
else if (PL_strcmp(token, "accel") == 0)
mKeyMask |= AccelKeyMask();
else if (PL_strcmp(token, "access") == 0)
mKeyMask |= KeyToMask(kMenuAccessKey);
else if (PL_strcmp(token, "any") == 0)
mKeyMask &= ~(mKeyMask << 5);
token = nsCRT::strtok(newStr, ", \t", &newStr);
}
free(str);
}
nsAutoString key(aCharCode);
if (key.IsEmpty()) {
if (mType & NS_HANDLER_TYPE_XUL) {
aKeyElement->GetAttr(kNameSpaceID_None, nsGkAtoms::key, key);
if (key.IsEmpty())
aKeyElement->GetAttr(kNameSpaceID_None, nsGkAtoms::charcode, key);
}
}
if (!key.IsEmpty()) {
if (mKeyMask == 0) mKeyMask = cAllModifiers;
ToLowerCase(key);
// We have a charcode.
mMisc = 1;
mDetail = key[0];
const uint8_t GTK2Modifiers = cShift | cControl | cShiftMask | cControlMask;
if ((mType & NS_HANDLER_TYPE_XUL) &&
(mKeyMask & GTK2Modifiers) == GTK2Modifiers &&
modifiers.First() != char16_t(',') &&
(mDetail == 'u' || mDetail == 'U'))
ReportKeyConflict(key.get(), modifiers.get(), aKeyElement,
"GTK2Conflict2");
const uint8_t WinModifiers = cControl | cAlt | cControlMask | cAltMask;
if ((mType & NS_HANDLER_TYPE_XUL) &&
(mKeyMask & WinModifiers) == WinModifiers &&
modifiers.First() != char16_t(',') &&
(('A' <= mDetail && mDetail <= 'Z') ||
('a' <= mDetail && mDetail <= 'z')))
ReportKeyConflict(key.get(), modifiers.get(), aKeyElement,
"WinConflict2");
} else {
key.Assign(aKeyCode);
if (mType & NS_HANDLER_TYPE_XUL)
aKeyElement->GetAttr(kNameSpaceID_None, nsGkAtoms::keycode, key);
if (!key.IsEmpty()) {
if (mKeyMask == 0) mKeyMask = cAllModifiers;
mDetail = GetMatchingKeyCode(key);
}
}
if (aGroup && nsDependentString(aGroup).EqualsLiteral("system"))
mType |= NS_HANDLER_TYPE_SYSTEM;
if (aPreventDefault &&
nsDependentString(aPreventDefault).EqualsLiteral("true"))
mType |= NS_HANDLER_TYPE_PREVENTDEFAULT;
if (aAllowUntrusted) {
mType |= NS_HANDLER_HAS_ALLOW_UNTRUSTED_ATTR;
if (nsDependentString(aAllowUntrusted).EqualsLiteral("true")) {
mType |= NS_HANDLER_ALLOW_UNTRUSTED;
} else {
mType &= ~NS_HANDLER_ALLOW_UNTRUSTED;
}
}
}
void nsXBLPrototypeHandler::ReportKeyConflict(const char16_t* aKey,
const char16_t* aModifiers,
Element* aKeyElement,
const char* aMessageName) {
nsCOMPtr<Document> doc;
if (mPrototypeBinding) {
nsXBLDocumentInfo* docInfo = mPrototypeBinding->XBLDocumentInfo();
if (docInfo) {
doc = docInfo->GetDocument();
}
} else {
doc = aKeyElement->OwnerDoc();
}
nsAutoString id;
aKeyElement->GetAttr(kNameSpaceID_None, nsGkAtoms::id, id);
const char16_t* params[] = {aKey, aModifiers, id.get()};
nsContentUtils::ReportToConsole(
nsIScriptError::warningFlag, NS_LITERAL_CSTRING("XBL Prototype Handler"),
doc, nsContentUtils::eXBL_PROPERTIES, aMessageName, params,
ArrayLength(params), nullptr, EmptyString(), mLineNumber);
}
bool nsXBLPrototypeHandler::ModifiersMatchMask(
UIEvent* aEvent, const IgnoreModifierState& aIgnoreModifierState) {
WidgetInputEvent* inputEvent = aEvent->WidgetEventPtr()->AsInputEvent();
NS_ENSURE_TRUE(inputEvent, false);
if (mKeyMask & cMetaMask) {
if (inputEvent->IsMeta() != ((mKeyMask & cMeta) != 0)) {
return false;
}
}
if ((mKeyMask & cOSMask) && !aIgnoreModifierState.mOS) {
if (inputEvent->IsOS() != ((mKeyMask & cOS) != 0)) {
return false;
}
}
if (mKeyMask & cShiftMask && !aIgnoreModifierState.mShift) {
if (inputEvent->IsShift() != ((mKeyMask & cShift) != 0)) {
return false;
}
}
if (mKeyMask & cAltMask) {
if (inputEvent->IsAlt() != ((mKeyMask & cAlt) != 0)) {
return false;
}
}
if (mKeyMask & cControlMask) {
if (inputEvent->IsControl() != ((mKeyMask & cControl) != 0)) {
return false;
}
}
return true;
}
nsresult nsXBLPrototypeHandler::Read(nsIObjectInputStream* aStream) {
AssertInCompilationScope();
nsresult rv = aStream->Read8(&mPhase);
NS_ENSURE_SUCCESS(rv, rv);
rv = aStream->Read8(&mType);
NS_ENSURE_SUCCESS(rv, rv);
rv = aStream->Read8(&mMisc);
NS_ENSURE_SUCCESS(rv, rv);
rv = aStream->Read32(reinterpret_cast<uint32_t*>(&mKeyMask));
NS_ENSURE_SUCCESS(rv, rv);
uint32_t detail;
rv = aStream->Read32(&detail);
NS_ENSURE_SUCCESS(rv, rv);
mDetail = detail;
nsAutoString name;
rv = aStream->ReadString(name);
NS_ENSURE_SUCCESS(rv, rv);
mEventName = NS_Atomize(name);
rv = aStream->Read32(&mLineNumber);
NS_ENSURE_SUCCESS(rv, rv);
nsAutoString handlerText;
rv = aStream->ReadString(handlerText);
NS_ENSURE_SUCCESS(rv, rv);
if (!handlerText.IsEmpty()) mHandlerText = ToNewUnicode(handlerText);
return NS_OK;
}
nsresult nsXBLPrototypeHandler::Write(nsIObjectOutputStream* aStream) {
AssertInCompilationScope();
// Make sure we don't write out NS_HANDLER_TYPE_XUL types, as they are used
// for <keyset> elements.
if ((mType & NS_HANDLER_TYPE_XUL) || !mEventName) return NS_OK;
XBLBindingSerializeDetails type = XBLBinding_Serialize_Handler;
nsresult rv = aStream->Write8(type);
rv = aStream->Write8(mPhase);
NS_ENSURE_SUCCESS(rv, rv);
rv = aStream->Write8(mType);
NS_ENSURE_SUCCESS(rv, rv);
rv = aStream->Write8(mMisc);
NS_ENSURE_SUCCESS(rv, rv);
rv = aStream->Write32(static_cast<uint32_t>(mKeyMask));
NS_ENSURE_SUCCESS(rv, rv);
rv = aStream->Write32(mDetail);
NS_ENSURE_SUCCESS(rv, rv);
rv = aStream->WriteWStringZ(nsDependentAtomString(mEventName).get());
NS_ENSURE_SUCCESS(rv, rv);
rv = aStream->Write32(mLineNumber);
NS_ENSURE_SUCCESS(rv, rv);
return aStream->WriteWStringZ(mHandlerText ? mHandlerText : u"");
}
size_t nsXBLPrototypeHandler::SizeOfIncludingThis(
MallocSizeOf aMallocSizeOf) const {
size_t n = 0;
for (const nsXBLPrototypeHandler* handler = this; handler;
handler = handler->mNextHandler) {
n += aMallocSizeOf(handler);
if (!(mType & NS_HANDLER_TYPE_XUL)) {
n += aMallocSizeOf(handler->mHandlerText);
}
n += aMallocSizeOf(handler->mHandler);
}
return n;
}
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