eventsender.cpp

linux下开源浏览器WebKit的源码,市面上的很多商用浏览器都是移植自WebKit

        return;
    }

    if (msgQueue[startOfQueue].delay) {
        ::Sleep(msgQueue[startOfQueue].delay);
        msgQueue[startOfQueue].delay = 0;
    }

    ::PostMessage(webViewWindow, WM_DRT_SEND_QUEUED_EVENT, 0, 0);
    while (::GetMessage(&msg, webViewWindow, 0, 0)) {
        // FIXME: Why do we get a WM_MOUSELEAVE? it breaks tests
        if (msg.message == WM_MOUSELEAVE)
            continue;
        if (msg.message != WM_DRT_SEND_QUEUED_EVENT) {
            dispatchMessage(&msg);
            continue;
        }
        msg = msgQueue[startOfQueue++].msg;
        switch (msg.message) {
            case WM_LBUTTONUP:
                doMouseUp(msg);
                break;
            case WM_MOUSEMOVE:
                doMouseMove(msg);
                break;
            case WM_LBUTTONDOWN:
                dispatchMessage(&msg);
                break;
            default:
                // Not reached
                break;
        }
        if (startOfQueue >= endOfQueue)
            break;
        ::Sleep(msgQueue[startOfQueue].delay);
        msgQueue[startOfQueue].delay = 0;
        ::PostMessage(webViewWindow, WM_DRT_SEND_QUEUED_EVENT, 0, 0);
    }
    startOfQueue = 0;
    endOfQueue = 0;

    replayingSavedEvents = false;
}

static JSValueRef keyDownCallback(JSContextRef context, JSObjectRef function, JSObjectRef thisObject, size_t argumentCount, const JSValueRef arguments[], JSValueRef* exception)
{
    if (argumentCount < 1)
        return JSValueMakeUndefined(context);

    static const JSStringRef lengthProperty = JSStringCreateWithUTF8CString("length");

    COMPtr<IWebFramePrivate> framePrivate;
    if (SUCCEEDED(frame->QueryInterface(&framePrivate)))
        framePrivate->layout();
    
    JSStringRef character = JSValueToStringCopy(context, arguments[0], exception);
    ASSERT(!*exception);
    int virtualKeyCode;
    int charCode = 0;
    int keyData = 1;
    bool needsShiftKeyModifier = false;
    if (JSStringIsEqualToUTF8CString(character, "leftArrow")) {
        virtualKeyCode = VK_LEFT;
        keyData += KF_EXTENDED << 16; // In this case, extended means "not keypad".
    } else if (JSStringIsEqualToUTF8CString(character, "rightArrow")) {
        virtualKeyCode = VK_RIGHT;
        keyData += KF_EXTENDED << 16;
    } else if (JSStringIsEqualToUTF8CString(character, "upArrow")) {
        virtualKeyCode = VK_UP;
        keyData += KF_EXTENDED << 16;
    } else if (JSStringIsEqualToUTF8CString(character, "downArrow")) {
        virtualKeyCode = VK_DOWN;
        keyData += KF_EXTENDED << 16;
    } else if (JSStringIsEqualToUTF8CString(character, "pageUp"))
        virtualKeyCode = VK_PRIOR;
    else if (JSStringIsEqualToUTF8CString(character, "pageDown"))
        virtualKeyCode = VK_NEXT;
    else if (JSStringIsEqualToUTF8CString(character, "home"))
        virtualKeyCode = VK_HOME;
    else if (JSStringIsEqualToUTF8CString(character, "end"))
        virtualKeyCode = VK_END;
    else if (JSStringIsEqualToUTF8CString(character, "delete"))
        virtualKeyCode = VK_BACK;
    else {
        charCode = JSStringGetCharactersPtr(character)[0];
        virtualKeyCode = LOBYTE(VkKeyScan(charCode));
        if (WTF::isASCIIUpper(charCode))
            needsShiftKeyModifier = true;
    }
    JSStringRelease(character);

    BYTE keyState[256];
    if (argumentCount > 1 || needsShiftKeyModifier) {
        ::GetKeyboardState(keyState);

        BYTE newKeyState[256];
        memcpy(newKeyState, keyState, sizeof(keyState));

        if (needsShiftKeyModifier)
            newKeyState[VK_SHIFT] = 0x80;

        if (argumentCount > 1) {
            JSObjectRef modifiersArray = JSValueToObject(context, arguments[1], exception);
            if (modifiersArray) {
                int modifiersCount = JSValueToNumber(context, JSObjectGetProperty(context, modifiersArray, lengthProperty, 0), 0);
                for (int i = 0; i < modifiersCount; ++i) {
                    JSValueRef value = JSObjectGetPropertyAtIndex(context, modifiersArray, i, 0);
                    JSStringRef string = JSValueToStringCopy(context, value, 0);
                    if (JSStringIsEqualToUTF8CString(string, "ctrlKey"))
                        newKeyState[VK_CONTROL] = 0x80;
                    else if (JSStringIsEqualToUTF8CString(string, "shiftKey"))
                        newKeyState[VK_SHIFT] = 0x80;
                    else if (JSStringIsEqualToUTF8CString(string, "altKey"))
                        newKeyState[VK_MENU] = 0x80;

                    JSStringRelease(string);
                }
            }
        }

        ::SetKeyboardState(newKeyState);
    }

    MSG msg = makeMsg(webViewWindow, (::GetKeyState(VK_MENU) & 0x8000) ? WM_SYSKEYDOWN : WM_KEYDOWN, virtualKeyCode, keyData);
    if (virtualKeyCode != 255)
        dispatchMessage(&msg);
    else {
        // For characters that do not exist in the active keyboard layout,
        // ::Translate will not work, so we post an WM_CHAR event ourselves.
        ::PostMessage(webViewWindow, WM_CHAR, charCode, 0);
    }

    // Tests expect that all messages are processed by the time keyDown() returns.
    if (::PeekMessage(&msg, webViewWindow, WM_CHAR, WM_CHAR, PM_REMOVE) || ::PeekMessage(&msg, webViewWindow, WM_SYSCHAR, WM_SYSCHAR, PM_REMOVE))
        ::DispatchMessage(&msg);

    MSG msgUp = makeMsg(webViewWindow, (::GetKeyState(VK_MENU) & 0x8000) ? WM_SYSKEYUP : WM_KEYUP, virtualKeyCode, keyData);
    ::DispatchMessage(&msgUp);

    if (argumentCount > 1 || needsShiftKeyModifier)
        ::SetKeyboardState(keyState);

    return JSValueMakeUndefined(context);
}

// eventSender.dispatchMessage(message, wParam, lParam, time = currentEventTime(), x = lastMousePosition.x, y = lastMousePosition.y)
static JSValueRef dispatchMessageCallback(JSContextRef context, JSObjectRef function, JSObjectRef thisObject, size_t argumentCount, const JSValueRef arguments[], JSValueRef* exception)
{
    if (argumentCount < 3)
        return JSValueMakeUndefined(context);

    COMPtr<IWebFramePrivate> framePrivate;
    if (SUCCEEDED(frame->QueryInterface(&framePrivate)))
        framePrivate->layout();
    
    MSG msg = {};
    msg.hwnd = webViewWindow;
    msg.message = JSValueToNumber(context, arguments[0], exception);
    ASSERT(!*exception);
    msg.wParam = JSValueToNumber(context, arguments[1], exception);
    ASSERT(!*exception);
    msg.lParam = static_cast<ULONG_PTR>(JSValueToNumber(context, arguments[2], exception));
    ASSERT(!*exception);
    if (argumentCount >= 4) {
        msg.time = JSValueToNumber(context, arguments[3], exception);
        ASSERT(!*exception);
    }
    if (!msg.time)
        msg.time = currentEventTime();
    if (argumentCount >= 6) {
        msg.pt.x = JSValueToNumber(context, arguments[4], exception);
        ASSERT(!*exception);
        msg.pt.y = JSValueToNumber(context, arguments[5], exception);
        ASSERT(!*exception);
    } else
        msg.pt = lastMousePosition;

    ::DispatchMessage(&msg);

    return JSValueMakeUndefined(context);
}

static JSValueRef textZoomInCallback(JSContextRef context, JSObjectRef function, JSObjectRef thisObject, size_t argumentCount, const JSValueRef arguments[], JSValueRef* exception)
{
    COMPtr<IWebView> webView;
    if (FAILED(frame->webView(&webView)))
        return JSValueMakeUndefined(context);

    COMPtr<IWebIBActions> webIBActions(Query, webView);
    if (!webIBActions)
        return JSValueMakeUndefined(context);

    webIBActions->makeTextLarger(0);
    return JSValueMakeUndefined(context);
}

static JSValueRef textZoomOutCallback(JSContextRef context, JSObjectRef function, JSObjectRef thisObject, size_t argumentCount, const JSValueRef arguments[], JSValueRef* exception)
{
    COMPtr<IWebView> webView;
    if (FAILED(frame->webView(&webView)))
        return JSValueMakeUndefined(context);

    COMPtr<IWebIBActions> webIBActions(Query, webView);
    if (!webIBActions)
        return JSValueMakeUndefined(context);

    webIBActions->makeTextSmaller(0);
    return JSValueMakeUndefined(context);
}

static JSValueRef zoomPageInCallback(JSContextRef context, JSObjectRef function, JSObjectRef thisObject, size_t argumentCount, const JSValueRef arguments[], JSValueRef* exception)
{
    COMPtr<IWebView> webView;
    if (FAILED(frame->webView(&webView)))
        return JSValueMakeUndefined(context);

    COMPtr<IWebIBActions> webIBActions(Query, webView);
    if (!webIBActions)
        return JSValueMakeUndefined(context);

    webIBActions->zoomPageIn(0);
    return JSValueMakeUndefined(context);
}

static JSValueRef zoomPageOutCallback(JSContextRef context, JSObjectRef function, JSObjectRef thisObject, size_t argumentCount, const JSValueRef arguments[], JSValueRef* exception)
{
    COMPtr<IWebView> webView;
    if (FAILED(frame->webView(&webView)))
        return JSValueMakeUndefined(context);

    COMPtr<IWebIBActions> webIBActions(Query, webView);
    if (!webIBActions)
        return JSValueMakeUndefined(context);

    webIBActions->zoomPageOut(0);
    return JSValueMakeUndefined(context);
}

static JSStaticFunction staticFunctions[] = {
    { "contextClick", contextClickCallback, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontDelete },
    { "mouseDown", mouseDownCallback, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontDelete },
    { "mouseUp", mouseUpCallback, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontDelete },
    { "mouseMoveTo", mouseMoveToCallback, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontDelete },
    { "leapForward", leapForwardCallback, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontDelete },
    { "keyDown", keyDownCallback, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontDelete },
    { "dispatchMessage", dispatchMessageCallback, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontDelete },
    { "textZoomIn", textZoomInCallback, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontDelete },
    { "textZoomOut", textZoomOutCallback, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontDelete },
    { "zoomPageIn", zoomPageInCallback, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontDelete },
    { "zoomPageOut", zoomPageOutCallback, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontDelete },
    { 0, 0, 0 }
};

static JSStaticValue staticValues[] = {
    { "dragMode", getDragModeCallback, setDragModeCallback, kJSPropertyAttributeNone },
    { "WM_KEYDOWN", getConstantCallback, 0, kJSPropertyAttributeReadOnly | kJSPropertyAttributeNone },
    { "WM_KEYUP", getConstantCallback, 0, kJSPropertyAttributeReadOnly | kJSPropertyAttributeNone },
    { "WM_CHAR", getConstantCallback, 0, kJSPropertyAttributeReadOnly | kJSPropertyAttributeNone },
    { "WM_DEADCHAR", getConstantCallback, 0, kJSPropertyAttributeReadOnly | kJSPropertyAttributeNone },
    { "WM_SYSKEYDOWN", getConstantCallback, 0, kJSPropertyAttributeReadOnly | kJSPropertyAttributeNone },
    { "WM_SYSKEYUP", getConstantCallback, 0, kJSPropertyAttributeReadOnly | kJSPropertyAttributeNone },
    { "WM_SYSCHAR", getConstantCallback, 0, kJSPropertyAttributeReadOnly | kJSPropertyAttributeNone },
    { "WM_SYSDEADCHAR", getConstantCallback, 0, kJSPropertyAttributeReadOnly | kJSPropertyAttributeNone },
    { 0, 0, 0, 0 }
};

static JSClassRef getClass(JSContextRef context)
{
    static JSClassRef eventSenderClass = 0;

    if (!eventSenderClass) {
        JSClassDefinition classDefinition = {0};
        classDefinition.staticFunctions = staticFunctions;
        classDefinition.staticValues = staticValues;

        eventSenderClass = JSClassCreate(&classDefinition);
    }

    return eventSenderClass;
}

JSObjectRef makeEventSender(JSContextRef context)
{
    down = false;
    dragMode = true;
    replayingSavedEvents = false;
    timeOffset = 0;
    lastMousePosition.x = 0;
    lastMousePosition.y = 0;

    endOfQueue = 0;
    startOfQueue = 0;

    didDragEnter = false;
    draggingInfo = 0;

    return JSObjectMake(context, getClass(context), 0);
}