Java Code Examples for com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine#addPostponedAction()

/**
 * Posts a message.
 * @param message the object passed to the window
 * @param transfer an optional sequence of Transferable objects
 * @see <a href="https://developer.mozilla.org/en-US/docs/Web/API/window.postMessage">MDN documentation</a>
 */
@JsxFunction
public void postMessage(final String message, final Object transfer) {
    if (port1_ != null) {
        final Window w = getWindow();
        final URL currentURL = w.getWebWindow().getEnclosedPage().getUrl();
        final MessageEvent event = new MessageEvent();
        final String origin = currentURL.getProtocol() + "://" + currentURL.getHost() + ':' + currentURL.getPort();
        event.initMessageEvent(Event.TYPE_MESSAGE, false, false, message, origin, "", w, transfer);
        event.setParentScope(port1_);
        event.setPrototype(getPrototype(event.getClass()));

        final JavaScriptEngine jsEngine
            = (JavaScriptEngine) w.getWebWindow().getWebClient().getJavaScriptEngine();
        final PostponedAction action = new PostponedAction(w.getWebWindow().getEnclosedPage()) {
            @Override
            public void execute() throws Exception {
                final ContextFactory cf = jsEngine.getContextFactory();
                cf.call(cx -> port1_.dispatchEvent(event));
            }
        };
        jsEngine.addPostponedAction(action);
    }
}
 

/**
 * The decodeAudioData() method of the BaseAudioContext Interface is used to asynchronously
 * decode audio file data contained in an ArrayBuffer. In this case the ArrayBuffer is
 * loaded from XMLHttpRequest and FileReader.
 * The decoded AudioBuffer is resampled to the AudioContext's sampling rate,
 * then passed to a callback or promise.
 * @param buffer An ArrayBuffer containing the audio data to be decoded, usually grabbed
 * from XMLHttpRequest, WindowOrWorkerGlobalScope.fetch() or FileReader
 * @param success A callback function to be invoked when the decoding successfully finishes.
 * The single argument to this callback is an AudioBuffer representing the decodedData
 * (the decoded PCM audio data). Usually you'll want to put the decoded data into
 * an AudioBufferSourceNode, from which it can be played and manipulated how you want.
 * @param error An optional error callback, to be invoked if an error occurs
 * when the audio data is being decoded.
 * @return the promise or null
 */
@JsxFunction
public Promise decodeAudioData(final NativeArrayBuffer buffer, final Function success, final Function error) {
    final Window window = getWindow();
    final HtmlPage owningPage = (HtmlPage) window.getDocument().getPage();
    final JavaScriptEngine jsEngine =
            (JavaScriptEngine) window.getWebWindow().getWebClient().getJavaScriptEngine();

    if (error != null) {
        jsEngine.addPostponedAction(new PostponedAction(owningPage) {
            @Override
            public void execute() throws Exception {
                jsEngine.callFunction(owningPage, error, getParentScope(), AudioContext.this, new Object[] {});
            }
        });
        return null;
    }

    final Promise promise = Promise.reject(Context.getCurrentContext(), AudioContext.this, new Object[] {}, null);
    return promise;
}
 

/**
 * {@inheritDoc}
 */
@Override
public void characterDataChanged(final CharacterDataChangeEvent event) {
    final ScriptableObject target = event.getCharacterData().getScriptableObject();
    if (subtree_ || target == node_) {
        final MutationRecord mutationRecord = new MutationRecord();
        final Scriptable scope = getParentScope();
        mutationRecord.setParentScope(scope);
        mutationRecord.setPrototype(getPrototype(mutationRecord.getClass()));

        mutationRecord.setType("characterData");
        mutationRecord.setTarget(target);
        if (characterDataOldValue_) {
            mutationRecord.setOldValue(event.getOldValue());
        }

        final Window window = getWindow();
        final HtmlPage owningPage = (HtmlPage) window.getDocument().getPage();
        final JavaScriptEngine jsEngine =
                (JavaScriptEngine) window.getWebWindow().getWebClient().getJavaScriptEngine();
        jsEngine.addPostponedAction(new PostponedAction(owningPage) {
            @Override
            public void execute() throws Exception {
                final NativeArray array = new NativeArray(new Object[] {mutationRecord});
                ScriptRuntime.setBuiltinProtoAndParent(array, scope, TopLevel.Builtins.Array);
                jsEngine.callFunction(owningPage, function_, scope, MutationObserver.this, new Object[] {array});
            }
        });
    }
}
 

/**
 * {@inheritDoc}
 */
@Override
public void attributeReplaced(final HtmlAttributeChangeEvent event) {
    final HtmlElement target = event.getHtmlElement();
    if (subtree_ || target == node_.getDomNodeOrDie()) {
        final String attributeName = event.getName();
        if (attributeFilter_ == null || attributeFilter_.contains(attributeName)) {
            final MutationRecord mutationRecord = new MutationRecord();
            final Scriptable scope = getParentScope();
            mutationRecord.setParentScope(scope);
            mutationRecord.setPrototype(getPrototype(mutationRecord.getClass()));

            mutationRecord.setAttributeName(attributeName);
            mutationRecord.setType("attributes");
            mutationRecord.setTarget(target.getScriptableObject());
            if (attributeOldValue_) {
                mutationRecord.setOldValue(event.getValue());
            }

            final Window window = getWindow();
            final HtmlPage owningPage = (HtmlPage) window.getDocument().getPage();
            final JavaScriptEngine jsEngine =
                    (JavaScriptEngine) window.getWebWindow().getWebClient().getJavaScriptEngine();
            jsEngine.addPostponedAction(new PostponedAction(owningPage) {
                @Override
                public void execute() throws Exception {
                    final NativeArray array = new NativeArray(new Object[] {mutationRecord});
                    ScriptRuntime.setBuiltinProtoAndParent(array, scope, TopLevel.Builtins.Array);
                    jsEngine.callFunction(owningPage, function_, scope,
                                            MutationObserver.this, new Object[] {array});
                }
            });
        }
    }
}
 

/**
 * Posts a message.
 * @param message the object passed to the window
 * @param transfer an optional sequence of Transferable objects
 * @see <a href="https://developer.mozilla.org/en-US/docs/Web/API/window.postMessage">MDN documentation</a>
 */
@JsxFunction
public void postMessage(final String message, final Object transfer) {
    if (port1_ != null) {
        final Window w = getWindow();
        final URL currentURL = w.getWebWindow().getEnclosedPage().getUrl();
        final MessageEvent event = new MessageEvent();
        final String origin = currentURL.getProtocol() + "://" + currentURL.getHost() + ':' + currentURL.getPort();
        event.initMessageEvent(Event.TYPE_MESSAGE, false, false, message, origin, "", w, transfer);
        event.setParentScope(port1_);
        event.setPrototype(getPrototype(event.getClass()));

        final JavaScriptEngine jsEngine
            = (JavaScriptEngine) w.getWebWindow().getWebClient().getJavaScriptEngine();
        final PostponedAction action = new PostponedAction(w.getWebWindow().getEnclosedPage()) {
            @Override
            public void execute() throws Exception {
                final ContextAction contextAction = new ContextAction() {
                    @Override
                    public Object run(final Context cx) {
                        return port1_.dispatchEvent(event);
                    }
                };

                final ContextFactory cf = jsEngine.getContextFactory();
                cf.call(contextAction);
            }
        };
        jsEngine.addPostponedAction(action);
    }
}
 

/**
 * {@inheritDoc}
 */
@Override
public void characterDataChanged(final CharacterDataChangeEvent event) {
    final ScriptableObject target = event.getCharacterData().getScriptableObject();
    if (subtree_ || target == node_) {
        final MutationRecord mutationRecord = new MutationRecord();
        final Scriptable scope = getParentScope();
        mutationRecord.setParentScope(scope);
        mutationRecord.setPrototype(getPrototype(mutationRecord.getClass()));

        mutationRecord.setType("characterData");
        mutationRecord.setTarget(target);
        if (characterDataOldValue_) {
            mutationRecord.setOldValue(event.getOldValue());
        }

        final Window window = getWindow();
        final HtmlPage owningPage = (HtmlPage) window.getDocument().getPage();
        final JavaScriptEngine jsEngine =
                (JavaScriptEngine) window.getWebWindow().getWebClient().getJavaScriptEngine();
        jsEngine.addPostponedAction(new PostponedAction(owningPage) {
            @Override
            public void execute() throws Exception {
                final NativeArray array = new NativeArray(new Object[] {mutationRecord});
                ScriptRuntime.setBuiltinProtoAndParent(array, scope, TopLevel.Builtins.Array);
                jsEngine.callFunction(owningPage, function_, scope, MutationObserver.this, new Object[] {array});
            }
        });
    }
}
 

/**
 * {@inheritDoc}
 */
@Override
public void attributeReplaced(final HtmlAttributeChangeEvent event) {
    final HtmlElement target = event.getHtmlElement();
    if (subtree_ || target == node_.getDomNodeOrDie()) {
        final String attributeName = event.getName();
        if (attributeFilter_ == null || attributeFilter_.contains(attributeName)) {
            final MutationRecord mutationRecord = new MutationRecord();
            final Scriptable scope = getParentScope();
            mutationRecord.setParentScope(scope);
            mutationRecord.setPrototype(getPrototype(mutationRecord.getClass()));

            mutationRecord.setAttributeName(attributeName);
            mutationRecord.setType("attributes");
            mutationRecord.setTarget((ScriptableObject) target.getScriptableObject());
            if (attributeOldValue_) {
                mutationRecord.setOldValue(event.getValue());
            }

            final Window window = getWindow();
            final HtmlPage owningPage = (HtmlPage) window.getDocument().getPage();
            final JavaScriptEngine jsEngine =
                    (JavaScriptEngine) window.getWebWindow().getWebClient().getJavaScriptEngine();
            jsEngine.addPostponedAction(new PostponedAction(owningPage) {
                @Override
                public void execute() throws Exception {
                    final NativeArray array = new NativeArray(new Object[] {mutationRecord});
                    ScriptRuntime.setBuiltinProtoAndParent(array, scope, TopLevel.Builtins.Array);
                    jsEngine.callFunction(owningPage, function_, scope,
                                            MutationObserver.this, new Object[] {array});
                }
            });
        }
    }
}