Java JavaScript类代码示例

import com.vaadin.ui.JavaScript; //导入依赖的package包/类
void callBlind(final JavaScriptCallback<Void> javaScriptCallback)
{
	final Stopwatch timer = Stopwatch.createStarted();
	final ScheduledFuture<?> future = createTimeoutHook();

	JavaScript.getCurrent().addFunction(hookName, new JavaScriptFunction()
	{
		boolean done = false;

		private static final long serialVersionUID = 1L;

		@Override
		public void call(JsonArray arguments)
		{
			logger.debug("Handling response for " + hookName);
			if (!done)
			{
				done = true;
				javaScriptCallback.callback(null);
			}
			else
			{
				logger.warn("This appears to have been a duplicate callback, ignoring it!");
			}
			future.cancel(false);
			removeHooks(hookName, errorHookName);
			if (timer.elapsed(TimeUnit.MILLISECONDS) > EXPECTED_RESPONSE_TIME_MS)
			{
				logger.warn(jsToExecute + "\n\nResponded after {}ms", timer.elapsed(TimeUnit.MILLISECONDS));
			}

		}
	});
	setupErrorHook(future);
	JavaScript.getCurrent().execute(wrapJSInTryCatchBlind(jsToExecute));

}
 

import com.vaadin.ui.JavaScript; //导入依赖的package包/类
public FileExample() {
    setCaption("Interactive SVG");
    addComponent(new MLabel(
            "A simple example from an svg file using Embedded component. Unlike with Image component, the SVGs JS etc are active. The example also demonstrates how to provide a trivial server side integration API for the SVG."));
    Embedded svg = new Embedded();
    svg.setWidth("400px");
    svg.setHeight("400px");
    svg.setSource(new ClassResource("/pull.svg"));

    // Expose a JS hook that pull.svg file calls when clicked
    JavaScript.getCurrent().addFunction("callMyVaadinFunction", (JsonArray arguments) -> {
        Notification.show("Message from SVG:" + arguments.getString(0));
    });

    addComponent(svg);
}
 

import com.vaadin.ui.JavaScript; //导入依赖的package包/类
@SuppressWarnings("serial")
private final void registerJavaScriptFunctionsIfNeeded()
{
	if (jsFunctionsRegistered.getAndSet(true))
	{
		return; // already registered
	}

	final JavaScript javaScript = JavaScript.getCurrent();
	javaScript.addFunction(JS_FUNC_OnSwipe, new JavaScriptFunction()
	{
		@Override
		public void call(final JsonArray arguments)
		{
			invokeOnSwipe(arguments);
		}
	});
}
 

import com.vaadin.ui.JavaScript; //导入依赖的package包/类
public static void getCookieValue(String key, final Callback callback) {
    final String callbackid = "hybridbpmcookie"+UUID.randomUUID().toString().substring(0,8);
    JavaScript.getCurrent().addFunction(callbackid, new JavaScriptFunction() {

        @Override
        public void call(JsonArray arguments) {
            JavaScript.getCurrent().removeFunction(callbackid);
            if(arguments.length() == 0) {
                callback.onValue(null);
            } else {
                callback.onValue(arguments.getString(0));
            }
        }
    });
    JavaScript.getCurrent().execute(String.format(
            "var nameEQ = \"%2$s=\";var ca = document.cookie.split(';');for(var i=0;i < ca.length;i++) {var c = ca[i];while (c.charAt(0)==' ') c = c.substring(1,c.length); if (c.indexOf(nameEQ) == 0) {%1$s( c.substring(nameEQ.length,c.length)); return;};} %1$s();", 
            callbackid,key
    ));

}
 

import com.vaadin.ui.JavaScript; //导入依赖的package包/类
public static void detectCookieValue(String key, final Callback callback) {
    final String callbackid = "viritincookiecb"+UUID.randomUUID().toString().substring(0,8);
    JavaScript.getCurrent().addFunction(callbackid, new JavaScriptFunction() {
        private static final long serialVersionUID = -3426072590182105863L;

        @Override
        public void call(JsonArray arguments) {
            JavaScript.getCurrent().removeFunction(callbackid);
            if(arguments.length() == 0) {
                callback.onValueDetected(null);
            } else {
                callback.onValueDetected(arguments.getString(0));
            }
        }
    });
    
    JavaScript.getCurrent().execute(String.format(
            "var nameEQ = \"%2$s=\";var ca = document.cookie.split(';');for(var i=0;i < ca.length;i++) {var c = ca[i];while (c.charAt(0)==' ') c = c.substring(1,c.length); if (c.indexOf(nameEQ) == 0) {%1$s( c.substring(nameEQ.length,c.length)); return;};} %1$s();", 
            callbackid,key
    ));

}
 

import com.vaadin.ui.JavaScript; //导入依赖的package包/类
/**
 * Do on test closing
 * 
 * @param event
 */
public void requestClose(@Observes final CloseTestEvent event) {
	log.debug("close requested");
	if (requestBack) {
		log.debug("closing ProcessUI with history back");
		JavaScript javaScript = ui.getPage().getJavaScript();
		javaScript.execute("window.history.back();");
		ui.requestClose();

	} else {
		String path = VaadinServlet.getCurrent().getServletContext().getContextPath();
		ui.getPage().setLocation(path + CLOSE_URL);
		// this is also possible way but not for SWT browser
		// Page.getCurrent().getJavaScript().execute("window.setTimeout(function(){/*window.open('','_self','');*/window.close();},10);")

		log.debug("closing ProcessUI");
		ui.requestClose();
	}
}
 

import com.vaadin.ui.JavaScript; //导入依赖的package包/类
public static void showHelpBrowserWindow(String guid) {
    JavaScript javaScript = MainUI.getCurrent().getPage().getJavaScript();
    if (!useFirstName) {
        javaScript.execute(closeNativeWindow(HELP_WINDOW_NAME_1));
    } else {
        javaScript.execute(closeNativeWindow(HELP_WINDOW_NAME_2));
    }

    MainUI.getCurrent().getPage().open("/WebHelp/" + guid,
            useFirstName ? HELP_WINDOW_NAME_1 : HELP_WINDOW_NAME_2);
    useFirstName = !useFirstName;
}
 

import com.vaadin.ui.JavaScript; //导入依赖的package包/类
public static void setBeforePageUnloadMessage(final String message)
{
	final JavaScript javaScript = Page.getCurrent().getJavaScript();
	if (message == null || message.trim().isEmpty())
	{
		javaScript.execute("$(window).off('beforeunload');");
	}
	else
	{
		// TODO: escape the message
		javaScript.execute("$(window).on('beforeunload', function() { return \"" + message + "\"; });");
	}
}
 

import com.vaadin.ui.JavaScript; //导入依赖的package包/类
public synchronized void enable(final Component component, final SwipeHandler handler)
{
	Preconditions.checkNotNull(component, "component is null");
	final String componentId = component.getId();
	Preconditions.checkNotNull(componentId, "componentId is null");

	final ComponentSwipe swipe = new ComponentSwipe(componentId, handler);

	component2swipe.put(component, swipe);
	componentId2swipe.put(componentId, swipe);

	registerJavaScriptFunctionsIfNeeded();

	final JavaScript javaScript = JavaScript.getCurrent();
	javaScript.execute(""
			+ "if (!window.swipesMap) { window.swipesMap={}; }"
			//
			+ "window.swipesMap['" + componentId + "'] = Swiped.init({"
			+ "query: '#" + componentId + "'"
			+ ", left: 300"
			+ ", right: 300"
			+ ", tolerance: 200"
			+ ", onOpen: function() { " + JS_FUNC_OnSwipe + "('" + componentId + "'); }"
			+ "});"
			//
			+ "\n console.log('Enabled swiping for element: " + componentId + "');"
			);
}
 

import com.vaadin.ui.JavaScript; //导入依赖的package包/类
public void destroy()
{
	JavaScript.getCurrent().execute("window.swipesMap['" + componentId + "'].destroy(false);"); // isRemoveNode=false
}
 

import com.vaadin.ui.JavaScript; //导入依赖的package包/类
public static void setCookie(String key, String value, String path) {
    JavaScript.getCurrent().execute(String.format(
            "document.cookie = \"%s=%s; path=%s\";", key, value, path
    ));
}
 

import com.vaadin.ui.JavaScript; //导入依赖的package包/类
private static void addTypeStyle(final Long tagId, final String color) {
    final JavaScript javaScript = UI.getCurrent().getPage().getJavaScript();
    UI.getCurrent()
            .access(() -> javaScript.execute(
                    HawkbitCommonUtil.getScriptSMHighlightWithColor(".v-table-row-distribution-upload-type-" + tagId
                            + "{background-color:" + color + " !important;background-image:none !important }")));
}
 

import com.vaadin.ui.JavaScript; //导入依赖的package包/类
private void _jsSetTimeStep(TimeStep timeStep) {
	JavaScript.getCurrent()
			.execute("document.getElementById('" + LIVE_CHART_ID
					+ "').firstElementChild.contentDocument.getElementsByClassName('stepli')["
					+ timeStep.ordinal() + "].click();");
}
 

import com.vaadin.ui.JavaScript; //导入依赖的package包/类
public static void setCookie(String key, String value, LocalDateTime expirationTime) {
   
    String expires = toCookieGMTDate(expirationTime);
    
    JavaScript.getCurrent().execute(String.format(
            "document.cookie = \"%s=%s; Expires=%s\";", key, value, expires
    ));
}
 

import com.vaadin.ui.JavaScript; //导入依赖的package包/类
void removeHooks(final String hook1, final String hook2)
{
	final JavaScript js = JavaScript.getCurrent();
	js.removeFunction(hook1);
	js.removeFunction(hook2);

}