Java Code Examples for net.sourceforge.htmlunit.corejs.javascript.Context#getThreadLocal()

/**
 * Returns the mouse event currently firing, or {@code null} if no mouse event is being processed.
 * @return the mouse event currently firing
 */
@SuppressWarnings("unchecked")
public static MouseEvent getCurrentMouseEvent() {
    final Context context = Context.getCurrentContext();
    if (context != null) {
        final LinkedList<Event> events = (LinkedList<Event>) context.getThreadLocal(KEY_CURRENT_EVENT);
        if (events != null && !events.isEmpty() && events.getLast() instanceof MouseEvent) {
            return (MouseEvent) events.getLast();
        }
    }
    return null;
}
 

/**
 * Called when the event starts being fired.
 */
@SuppressWarnings("unchecked")
public void startFire() {
    final Context context = Context.getCurrentContext();
    LinkedList<Event> events = (LinkedList<Event>) context.getThreadLocal(KEY_CURRENT_EVENT);
    if (events == null) {
        events = new LinkedList<>();
        context.putThreadLocal(KEY_CURRENT_EVENT, events);
    }
    events.add(this);
}
 

/**
 * Returns the name of this frame's source.
 *
 * @return the name of this frame's source
 */
private static String getSourceName(final Context cx) {
    String source = (String) cx.getThreadLocal(KEY_LAST_SOURCE);
    if (source == null) {
        return "unknown";
    }
    // only the file name is interesting the rest of the url is mostly noise
    source = StringUtils.substringAfterLast(source, "/");
    // embedded scripts have something like "foo.html from (3, 10) to (10, 13)"
    source = StringUtils.substringBefore(source, " ");
    return source;
}
 

/**
 * Returns the line number of the first line in this frame's function or script, or <tt>???</tt>
 * if it cannot be determined. This is necessary because the line numbers provided by Rhino are unordered.
 *
 * @return the line number of the first line in this frame's function or script, or <tt>???</tt>
 *         if it cannot be determined
 */
private static String getFirstLine(final Context cx) {
    final Object line = cx.getThreadLocal(KEY_LAST_LINE);
    final String result;
    if (line == null) {
        result = "??";
    }
    else {
        result = String.valueOf(line);
    }
    return StringUtils.leftPad(result, 5);
}
 

/**
 * Returns the mouse event currently firing, or {@code null} if no mouse event is being processed.
 * @return the mouse event currently firing
 */
@SuppressWarnings("unchecked")
public static MouseEvent getCurrentMouseEvent() {
    final Context context = Context.getCurrentContext();
    if (context != null) {
        final LinkedList<Event> events = (LinkedList<Event>) context.getThreadLocal(KEY_CURRENT_EVENT);
        if (events != null && !events.isEmpty() && events.getLast() instanceof MouseEvent) {
            return (MouseEvent) events.getLast();
        }
    }
    return null;
}
 

/**
 * Called when the event starts being fired.
 */
@SuppressWarnings("unchecked")
public void startFire() {
    final Context context = Context.getCurrentContext();
    LinkedList<Event> events = (LinkedList<Event>) context.getThreadLocal(KEY_CURRENT_EVENT);
    if (events == null) {
        events = new LinkedList<>();
        context.putThreadLocal(KEY_CURRENT_EVENT, events);
    }
    events.add(this);
}
 

/**
 * Returns the name of this frame's source.
 *
 * @return the name of this frame's source
 */
private static String getSourceName(final Context cx) {
    String source = (String) cx.getThreadLocal(KEY_LAST_SOURCE);
    if (source == null) {
        return "unknown";
    }
    // only the file name is interesting the rest of the url is mostly noise
    source = StringUtils.substringAfterLast(source, "/");
    // embedded scripts have something like "foo.html from (3, 10) to (10, 13)"
    source = StringUtils.substringBefore(source, " ");
    return source;
}
 

/**
 * Returns the line number of the first line in this frame's function or script, or <tt>???</tt>
 * if it cannot be determined. This is necessary because the line numbers provided by Rhino are unordered.
 *
 * @return the line number of the first line in this frame's function or script, or <tt>???</tt>
 *         if it cannot be determined
 */
private static String getFirstLine(final Context cx) {
    final Object line = cx.getThreadLocal(KEY_LAST_LINE);
    final String result;
    if (line == null) {
        result = "??";
    }
    else {
        result = String.valueOf(line);
    }
    return StringUtils.leftPad(result, 5);
}
 

/**
 * Sends the specified content to the server in an HTTP request and receives the response.
 * @param content the body of the message being sent with the request
 */
@JsxFunction
public void send(final Object content) {
    if (webRequest_ == null) {
        return;
    }
    prepareRequest(content);

    final Window w = getWindow();
    final WebWindow ww = w.getWebWindow();
    final WebClient client = ww.getWebClient();
    final AjaxController ajaxController = client.getAjaxController();
    final HtmlPage page = (HtmlPage) ww.getEnclosedPage();
    final boolean synchron = ajaxController.processSynchron(page, webRequest_, async_);
    if (synchron) {
        doSend(Context.getCurrentContext());
    }
    else {
        if (getBrowserVersion().hasFeature(XHR_FIRE_STATE_OPENED_AGAIN_IN_ASYNC_MODE)) {
            // quite strange but IE seems to fire state loading twice
            // in async mode (at least with HTML of the unit tests)
            setState(OPENED, Context.getCurrentContext());
        }

        // Create and start a thread in which to execute the request.
        final Scriptable startingScope = w;
        final ContextFactory cf = ((JavaScriptEngine) client.getJavaScriptEngine()).getContextFactory();
        final ContextAction<Object> action = new ContextAction<Object>() {
            @Override
            public Object run(final Context cx) {
                // KEY_STARTING_SCOPE maintains a stack of scopes
                @SuppressWarnings("unchecked")
                Deque<Scriptable> stack =
                        (Deque<Scriptable>) cx.getThreadLocal(JavaScriptEngine.KEY_STARTING_SCOPE);
                if (null == stack) {
                    stack = new ArrayDeque<>();
                    cx.putThreadLocal(JavaScriptEngine.KEY_STARTING_SCOPE, stack);
                }
                stack.push(startingScope);

                try {
                    doSend(cx);
                }
                finally {
                    stack.pop();
                }
                return null;
            }

            @Override
            public String toString() {
                return "XMLHttpRequest " + webRequest_.getHttpMethod() + " '" + webRequest_.getUrl() + "'";
            }
        };
        final JavaScriptJob job = BackgroundJavaScriptFactory.theFactory().
                createJavascriptXMLHttpRequestJob(cf, action);
        if (LOG.isDebugEnabled()) {
            LOG.debug("Starting XMLHttpRequest thread for asynchronous request");
        }
        jobID_ = ww.getJobManager().addJob(job, page);
    }
}
 

/**
 * Sends an HTTP request to the server and receives a response.
 * @param body the body of the message being sent with the request.
 */
@JsxFunction
public void send(final Object body) {
    if (webRequest_ == null) {
        setState(STATE_DONE, Context.getCurrentContext());
        return;
    }
    if (sent_) {
        throw Context.reportRuntimeError("Unspecified error (request already sent).");
    }
    sent_ = true;

    prepareRequest(body);

    // quite strange but IE seems to fire state loading twice
    setState(STATE_OPENED, Context.getCurrentContext());

    final Window w = getWindow();
    final WebClient client = w.getWebWindow().getWebClient();
    final AjaxController ajaxController = client.getAjaxController();
    final HtmlPage page = (HtmlPage) w.getWebWindow().getEnclosedPage();
    final boolean synchron = ajaxController.processSynchron(page, webRequest_, async_);
    if (synchron) {
        doSend(Context.getCurrentContext());
    }
    else {
        // Create and start a thread in which to execute the request.
        final Scriptable startingScope = w;
        final ContextFactory cf = ((JavaScriptEngine) client.getJavaScriptEngine()).getContextFactory();
        final ContextAction<Object> action = new ContextAction<Object>() {
            @Override
            public Object run(final Context cx) {
                // KEY_STARTING_SCOPE maintains a stack of scopes
                @SuppressWarnings("unchecked")
                Deque<Scriptable> stack =
                        (Deque<Scriptable>) cx.getThreadLocal(JavaScriptEngine.KEY_STARTING_SCOPE);
                if (null == stack) {
                    stack = new ArrayDeque<>();
                    cx.putThreadLocal(JavaScriptEngine.KEY_STARTING_SCOPE, stack);
                }
                stack.push(startingScope);

                try {
                    doSend(cx);
                }
                finally {
                    stack.pop();
                }
                return null;
            }
        };
        final JavaScriptJob job = BackgroundJavaScriptFactory.theFactory().
                createJavascriptXMLHttpRequestJob(cf, action);
        if (LOG.isDebugEnabled()) {
            LOG.debug("Starting XMLHTTPRequest thread for asynchronous request");
        }
        jobID_ = w.getWebWindow().getJobManager().addJob(job, page);
    }
}
 

/**
 * It takes two arguments, both are callback functions for the success and failure cases of the Promise.
 *
 * @param onFulfilled success function
 * @param onRejected failure function
 * @return {@link Promise}
 */
@JsxFunction
public Promise then(final Object onFulfilled, final Object onRejected) {
    final Window window = getWindow();
    final Promise returnPromise = new Promise(window);

    final Promise thisPromise = this;

    final BasicJavaScriptJob job = new BasicJavaScriptJob() {

        @Override
        public void run() {
            final Context cx = Context.enter();
            try {
                Function toExecute = null;
                if (thisPromise.state_ == PromiseState.FULFILLED && onFulfilled instanceof Function) {
                    toExecute = (Function) onFulfilled;
                }
                else if (thisPromise.state_ == PromiseState.REJECTED && onRejected instanceof Function) {
                    toExecute = (Function) onRejected;
                }

                try {
                    final Object callbackResult;
                    if (toExecute == null) {
                        final Promise dummy = new Promise();
                        dummy.state_ = thisPromise.state_;
                        dummy.value_ = thisPromise.value_;
                        callbackResult = dummy;
                    }
                    else {
                        // KEY_STARTING_SCOPE maintains a stack of scopes
                        @SuppressWarnings("unchecked")
                        Stack<Scriptable> stack = (Stack<Scriptable>) cx.getThreadLocal(KEY_STARTING_SCOPE);
                        if (null == stack) {
                            stack = new Stack<>();
                            cx.putThreadLocal(KEY_STARTING_SCOPE, stack);
                        }
                        stack.push(window);
                        try {
                            callbackResult = toExecute.call(cx, window, thisPromise, new Object[] {value_});
                        }
                        finally {
                            stack.pop();
                        }

                        window.getWebWindow().getWebClient().getJavaScriptEngine().processPostponedActions();
                    }
                    if (callbackResult instanceof Promise) {
                        final Promise resultPromise = (Promise) callbackResult;
                        if (resultPromise.state_ == PromiseState.FULFILLED) {
                            returnPromise.settle(true, resultPromise.value_, window);
                        }
                        else if (resultPromise.state_ == PromiseState.REJECTED) {
                            returnPromise.settle(false, resultPromise.value_, window);
                        }
                        else {
                            if (resultPromise.dependentPromises_ == null) {
                                resultPromise.dependentPromises_ = new ArrayList<Promise>(2);
                            }
                            resultPromise.dependentPromises_.add(returnPromise);
                        }
                    }
                    else {
                        returnPromise.settle(true, callbackResult, window);
                    }
                }
                catch (final JavaScriptException e) {
                    returnPromise.settle(false, e.getValue(), window);
                }
            }
            finally {
                Context.exit();
            }
        }

        /** {@inheritDoc} */
        @Override
        public String toString() {
            return super.toString() + " Promise.then";
        }
    };

    if (state_ == PromiseState.FULFILLED || state_ == PromiseState.REJECTED) {
        window.getWebWindow().getJobManager().addJob(job, window.getDocument().getPage());
    }
    else {
        if (settledJobs_ == null) {
            settledJobs_ = new ArrayList<BasicJavaScriptJob>(2);
        }
        settledJobs_.add(job);
    }

    return returnPromise;
}
 

/**
 * Sends the specified content to the server in an HTTP request and receives the response.
 * @param content the body of the message being sent with the request
 */
@JsxFunction
public void send(final Object content) {
    if (webRequest_ == null) {
        return;
    }
    prepareRequest(content);

    final Window w = getWindow();
    final WebClient client = w.getWebWindow().getWebClient();
    final AjaxController ajaxController = client.getAjaxController();
    final HtmlPage page = (HtmlPage) w.getWebWindow().getEnclosedPage();
    final boolean synchron = ajaxController.processSynchron(page, webRequest_, async_);
    if (synchron) {
        doSend(Context.getCurrentContext());
    }
    else {
        if (getBrowserVersion().hasFeature(XHR_FIRE_STATE_OPENED_AGAIN_IN_ASYNC_MODE)) {
            // quite strange but IE seems to fire state loading twice
            // in async mode (at least with HTML of the unit tests)
            setState(OPENED, Context.getCurrentContext());
        }

        // Create and start a thread in which to execute the request.
        final Scriptable startingScope = w;
        final ContextFactory cf = ((JavaScriptEngine) client.getJavaScriptEngine()).getContextFactory();
        final ContextAction action = new ContextAction() {
            @Override
            public Object run(final Context cx) {
                // KEY_STARTING_SCOPE maintains a stack of scopes
                @SuppressWarnings("unchecked")
                Stack<Scriptable> stack =
                        (Stack<Scriptable>) cx.getThreadLocal(JavaScriptEngine.KEY_STARTING_SCOPE);
                if (null == stack) {
                    stack = new Stack<>();
                    cx.putThreadLocal(JavaScriptEngine.KEY_STARTING_SCOPE, stack);
                }
                stack.push(startingScope);

                try {
                    doSend(cx);
                }
                finally {
                    stack.pop();
                }
                return null;
            }

            @Override
            public String toString() {
                return "XMLHttpRequest " + webRequest_.getHttpMethod() + " '" + webRequest_.getUrl() + "'";
            }
        };
        final JavaScriptJob job = BackgroundJavaScriptFactory.theFactory().
                createJavascriptXMLHttpRequestJob(cf, action);
        if (LOG.isDebugEnabled()) {
            LOG.debug("Starting XMLHttpRequest thread for asynchronous request");
        }
        jobID_ = w.getWebWindow().getJobManager().addJob(job, page);
    }
}
 

/**
 * Sends an HTTP request to the server and receives a response.
 * @param body the body of the message being sent with the request.
 */
@JsxFunction
public void send(final Object body) {
    if (webRequest_ == null) {
        setState(STATE_DONE, Context.getCurrentContext());
        return;
    }
    if (sent_) {
        throw Context.reportRuntimeError("Unspecified error (request already sent).");
    }
    sent_ = true;

    prepareRequest(body);

    // quite strange but IE seems to fire state loading twice
    setState(STATE_OPENED, Context.getCurrentContext());

    final Window w = getWindow();
    final WebClient client = w.getWebWindow().getWebClient();
    final AjaxController ajaxController = client.getAjaxController();
    final HtmlPage page = (HtmlPage) w.getWebWindow().getEnclosedPage();
    final boolean synchron = ajaxController.processSynchron(page, webRequest_, async_);
    if (synchron) {
        doSend(Context.getCurrentContext());
    }
    else {
        // Create and start a thread in which to execute the request.
        final Scriptable startingScope = w;
        final ContextFactory cf = ((JavaScriptEngine) client.getJavaScriptEngine()).getContextFactory();
        final ContextAction action = new ContextAction() {
            @Override
            public Object run(final Context cx) {
                // KEY_STARTING_SCOPE maintains a stack of scopes
                @SuppressWarnings("unchecked")
                Stack<Scriptable> stack =
                        (Stack<Scriptable>) cx.getThreadLocal(JavaScriptEngine.KEY_STARTING_SCOPE);
                if (null == stack) {
                    stack = new Stack<>();
                    cx.putThreadLocal(JavaScriptEngine.KEY_STARTING_SCOPE, stack);
                }
                stack.push(startingScope);

                try {
                    doSend(cx);
                }
                finally {
                    stack.pop();
                }
                return null;
            }
        };
        final JavaScriptJob job = BackgroundJavaScriptFactory.theFactory().
                createJavascriptXMLHttpRequestJob(cf, action);
        if (LOG.isDebugEnabled()) {
            LOG.debug("Starting XMLHTTPRequest thread for asynchronous request");
        }
        jobID_ = w.getWebWindow().getJobManager().addJob(job, page);
    }
}