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bug5048: started implementing cross-window messaging infrastructure

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This commit is contained in:
Axel Uhl committed 2019-11-06 17:07:30 +01:00
1 parent 6fd96c4190
commit cdbed1c7f3
15 files changed
+341 -4
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java/com.sap.sse.gwt/.gitignore
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@@ -1,3 +1,2 @@
/bin/
/bin/
/bin/
/com.sap.*
java/com.sap.sse.gwt/.tmp/gwt-work/.gitignore
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@@ -0,0 +1 @@
com.*
java/com.sap.sse.gwt/META-INF/MANIFEST.MF
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@@ -13,6 +13,7 @@ Require-Bundle: com.google.gwt.user;bundle-version="2.8.2";resolution:=optional,
com.sap.sse.filestorage,
com.sap.sse.security.common
Bundle-ActivationPolicy: lazy
Web-ContextPath: /gwt-base
Import-Package: com.sap.sse.security,
javax.servlet;version="3.1.0",
javax.servlet.descriptor;version="3.1.0",
java/com.sap.sse.gwt/Messaging.html
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<!doctype html>
<!-- The DOCTYPE declaration above will set the -->
<!-- browser's rendering engine into -->
<!-- "Standards Mode". Replacing this declaration -->
<!-- with a "Quirks Mode" doctype may lead to some -->
<!-- differences in layout. -->
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<!-- -->
<!-- Consider inlining CSS to reduce the number of requested files -->
<!-- -->
<link rel="shortcut icon" type="image/x-icon" href="images/sap.ico" />
<!-- -->
<!-- Any title is fine -->
<!-- -->
<title>Load this into an IFrame and create a MessagePort for that IFrame, then you can send and receive messages</title>
<!-- -->
<!-- This script loads your compiled module. -->
<!-- If you add any GWT meta tags, they must -->
<!-- be added before this line. -->
<!-- -->
<script type="text/javascript" src="com.sap.sse.gwt.Messaging/com.sap.sse.gwt.Messaging.nocache.js"></script>
</head>
<!-- -->
<!-- The body can have arbitrary html, or -->
<!-- you can leave the body empty if you want -->
<!-- to create a completely dynamic UI. -->
<!-- -->
<body>
<!-- OPTIONAL: include this if you want history support -->
<iframe src="javascript:''" id="__gwt_historyFrame" tabIndex='-1' style="position:absolute;width:0;height:0;border:0"></iframe>
<!-- RECOMMENDED if your web app will not function without JavaScript enabled -->
<noscript>
<div style="width: 22em; position: absolute; left: 50%; margin-left: -11em; color: red; background-color: white; border: 1px solid red; padding: 4px; font-family: sans-serif">
Your web browser must have JavaScript enabled
in order for this application to display correctly.
</div>
</noscript>
</body>
</html>
java/com.sap.sse.gwt/MessagingTest.html
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@@ -0,0 +1,48 @@
<!doctype html>
<!-- The DOCTYPE declaration above will set the -->
<!-- browser's rendering engine into -->
<!-- "Standards Mode". Replacing this declaration -->
<!-- with a "Quirks Mode" doctype may lead to some -->
<!-- differences in layout. -->
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<!-- -->
<!-- Consider inlining CSS to reduce the number of requested files -->
<!-- -->
<link rel="shortcut icon" type="image/x-icon" href="images/sap.ico" />
<!-- -->
<!-- Any title is fine -->
<!-- -->
<title>Messaging Test</title>
<!-- -->
<!-- This script loads your compiled module. -->
<!-- If you add any GWT meta tags, they must -->
<!-- be added before this line. -->
<!-- -->
<script type="text/javascript" src="com.sap.sse.gwt.MessagingTest/com.sap.sse.gwt.MessagingTest.nocache.js"></script>
</head>
<!-- -->
<!-- The body can have arbitrary html, or -->
<!-- you can leave the body empty if you want -->
<!-- to create a completely dynamic UI. -->
<!-- -->
<body>
<!-- OPTIONAL: include this if you want history support -->
<iframe src="javascript:''" id="__gwt_historyFrame" tabIndex='-1' style="position:absolute;width:0;height:0;border:0"></iframe>
<!-- RECOMMENDED if your web app will not function without JavaScript enabled -->
<noscript>
<div style="width: 22em; position: absolute; left: 50%; margin-left: -11em; color: red; background-color: white; border: 1px solid red; padding: 4px; font-family: sans-serif">
Your web browser must have JavaScript enabled
in order for this application to display correctly.
</div>
</noscript>
</body>
</html>
java/com.sap.sse.gwt/WEB-INF/web.xml
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<?xml version="1.0" encoding="utf-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
version="2.5">
<!-- Disable directory listing: -->
<servlet>
<servlet-name>default</servlet-name>
<servlet-class>org.eclipse.jetty.servlet.DefaultServlet
</servlet-class>
<init-param>
<param-name>dirAllowed</param-name>
<param-value>false</param-value>
</init-param>
<init-param>
<param-name>useFileMappedBuffer</param-name>
<param-value>false</param-value>
</init-param>
</servlet>
</web-app>
java/com.sap.sse.gwt/build.properties
+3 -1
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@@ -2,7 +2,9 @@ source.. = src/,\
resources/
output.. = bin/
bin.includes = META-INF/,\
.
.,\
com.sap.sse.gwt.MessagingTest/,\
com.sap.sse.gwt.Messaging/
src.includes = resources/,\
src/
java/com.sap.sse.gwt/pom.xml
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@@ -9,7 +9,18 @@
</parent>
<artifactId>com.sap.sse.gwt</artifactId>
<packaging>eclipse-plugin</packaging>
<dependencies>
<dependency>
<groupId>com.google.elemental2</groupId>
<artifactId>elemental2-core</artifactId>
<version>1.0.0-RC1</version>
</dependency>
<dependency>
<groupId>com.google.elemental2</groupId>
<artifactId>elemental2-dom</artifactId>
<version>1.0.0-RC1</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
java/com.sap.sse.gwt/src/com/sap/sse/gwt/Messaging.gwt.xml
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<?xml version="1.0" encoding="UTF-8"?>
<!-- Could not determine the version of your GWT SDK; using the module DTD from GWT 1.6.4. You may want to change this. -->
<!DOCTYPE module PUBLIC "-//Google Inc.//DTD Google Web Toolkit 2.7.0//EN" "http://gwtproject.org/doctype/2.7.0/gwt-module.dtd">
<module>
<!-- Inherit the core Web Toolkit stuff. -->
<inherits name='com.google.gwt.user.User'/>
<inherits name='com.google.gwt.debug.Debug'/>
<inherits name='com.google.gwt.ajaxloader.AjaxLoader' />
<inherits name="com.google.gwt.resources.Resources" />
<inherits name="com.google.gwt.logging.Logging"/>
<!-- Other module inherits -->
<inherits name="com.sap.sse.gwt.EmulatedJRE" />
<inherits name="com.sap.sse.gwt.SSESharedGWT" />
<inherits name="com.sap.sse.SSECommon" />
<super-source path="jre" />
<entry-point class='com.sap.sse.gwt.client.messaging.MessagingEntryPoint'/>
<set-property name="gwt.logging.enabled" value="TRUE"/>
<set-property name="gwt.logging.logLevel" value="FINE"/>
<set-property name="gwt.logging.consoleHandler" value="ENABLED" />
<set-property name="gwt.logging.developmentModeHandler" value="DISABLED" />
<set-property name="gwt.logging.systemHandler" value="ENABLED" />
<!-- Turning CSS obfuscation off -->
<set-configuration-property name="CssResource.style" value="pretty"/>
<!-- Turning CSS obfuscation on, which is the default -->
<!-- <set-configuration-property name="CssResource.style" value="obf"/> -->
<set-configuration-property name="CssResource.enableGss" value="true" />
<set-configuration-property name="CssResource.conversionMode" value="strict" />
<source path='client'/>
</module>
java/com.sap.sse.gwt/src/com/sap/sse/gwt/MessagingTest.gwt.xml
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@@ -0,0 +1,36 @@
<?xml version="1.0" encoding="UTF-8"?>
<!-- Could not determine the version of your GWT SDK; using the module DTD from GWT 1.6.4. You may want to change this. -->
<!DOCTYPE module PUBLIC "-//Google Inc.//DTD Google Web Toolkit 2.7.0//EN" "http://gwtproject.org/doctype/2.7.0/gwt-module.dtd">
<module>
<!-- Inherit the core Web Toolkit stuff. -->
<inherits name='com.google.gwt.user.User'/>
<inherits name='com.google.gwt.debug.Debug'/>
<inherits name='com.google.gwt.ajaxloader.AjaxLoader' />
<inherits name="com.google.gwt.resources.Resources" />
<inherits name="com.google.gwt.logging.Logging"/>
<!-- Other module inherits -->
<inherits name="com.sap.sse.gwt.EmulatedJRE" />
<inherits name="com.sap.sse.gwt.SSESharedGWT" />
<inherits name="com.sap.sse.SSECommon" />
<super-source path="jre" />
<entry-point class='com.sap.sse.gwt.client.messaging.MessagingTestEntryPoint'/>
<set-property name="gwt.logging.enabled" value="TRUE"/>
<set-property name="gwt.logging.logLevel" value="FINE"/>
<set-property name="gwt.logging.consoleHandler" value="ENABLED" />
<set-property name="gwt.logging.developmentModeHandler" value="DISABLED" />
<set-property name="gwt.logging.systemHandler" value="ENABLED" />
<!-- Turning CSS obfuscation off -->
<set-configuration-property name="CssResource.style" value="pretty"/>
<!-- Turning CSS obfuscation on, which is the default -->
<!-- <set-configuration-property name="CssResource.style" value="obf"/> -->
<set-configuration-property name="CssResource.enableGss" value="true" />
<set-configuration-property name="CssResource.conversionMode" value="strict" />
<source path='client'/>
</module>
java/com.sap.sse.gwt/src/com/sap/sse/gwt/client/messaging/MessageEvent.java
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package com.sap.sse.gwt.client.messaging;
import com.google.gwt.core.client.JavaScriptObject;
import com.sap.sse.gwt.client.StorageEvent;
public class MessageEvent<T> extends JavaScriptObject {
protected MessageEvent() {
super();
}
public static interface Handler {
void onStorageChange(StorageEvent event);
}
public final native T getData() /*-{
return this.data;
}-*/;
public final native String getLastEventId() /*-{
return this.lastEventId;
}-*/;
public final native String getOrigin() /*-{
return this.origin;
}-*/;
public final MessagePort getSource() {
return getWindowSource().cast();
}
private final native JavaScriptObject getWindowSource() /*-{
return this.source;
}-*/;
}
java/com.sap.sse.gwt/src/com/sap/sse/gwt/client/messaging/MessageListener.java
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package com.sap.sse.gwt.client.messaging;
import com.google.gwt.core.client.JavaScriptObject;
public interface MessageListener<T> {
default void onMessageReceived(JavaScriptObject jsMessageEvent) {
@SuppressWarnings("unchecked")
final MessageEvent<T> messageEvent = (MessageEvent<T>) jsMessageEvent.cast();
this.onMessageReceived(messageEvent);
}
void onMessageReceived(MessageEvent<T> messageEvent);
}
java/com.sap.sse.gwt/src/com/sap/sse/gwt/client/messaging/MessagePort.java
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package com.sap.sse.gwt.client.messaging;
import com.google.gwt.core.client.JavaScriptObject;
import com.google.gwt.dom.client.IFrameElement;
/**
* The handle to a {@code Window} in the DOM which can be used to post a message to and to register a message event
* listener on.
*
* @author Axel Uhl (d043530)
*
*/
public class MessagePort extends JavaScriptObject {
protected MessagePort() {
super();
}
public static final native MessagePort getGlobalWindow() /*-{
return $wnd;
}-*/;
public static final native MessagePort getCurrentWindow() /*-{
return window;
}-*/;
public static final native MessagePort getFromIframe(IFrameElement iframe) /*-{
return iframe.contentWindow;
}-*/;
public final native <T> void postMessage(T message, String targetOrigin) /*-{
this.postMessage(message, targetOrigin);
}-*/;
public final native <T> void addMessageListener(MessageListener<T> listener) /*-{
this.addEventListener("message",
function(messageEvent) {
listener.@com.sap.sse.gwt.client.messaging.MessageListener::onMessageReceived(Lcom/google/gwt/core/client/JavaScriptObject;)(messageEvent);
});
}-*/;
}
java/com.sap.sse.gwt/src/com/sap/sse/gwt/client/messaging/MessagingEntryPoint.java
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@@ -0,0 +1,19 @@
package com.sap.sse.gwt.client.messaging;
import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.core.client.GWT;
public class MessagingEntryPoint implements EntryPoint {
@Override
public void onModuleLoad() {
GWT.log("This is Messaging Entry Point");
final MessagePort messagePort = MessagePort.getGlobalWindow();
messagePort.addMessageListener(new MessageListener<String>() {
@Override
public void onMessageReceived(MessageEvent<String> messageEvent) {
GWT.log("Received "+messageEvent.getData()+" from origin "+messageEvent.getOrigin());
messageEvent.getSource().postMessage("Response to "+messageEvent.getData(), "*");
}
});
}
}
java/com.sap.sse.gwt/src/com/sap/sse/gwt/client/messaging/MessagingTestEntryPoint.java
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package com.sap.sse.gwt.client.messaging;
import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.core.client.GWT;
import com.google.gwt.dom.client.Document;
import com.google.gwt.dom.client.IFrameElement;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.RootPanel;
public class MessagingTestEntryPoint implements EntryPoint {
@Override
public void onModuleLoad() {
GWT.log("Hello World");
final MessagePort localPort = MessagePort.getCurrentWindow();
localPort.addMessageListener(messageEvent -> GWT.log("Received " + messageEvent.getData() + " from origin " + messageEvent.getOrigin()));
final IFrameElement iframe1 = Document.get().createIFrameElement();
iframe1.setSrc("http://localhost:8888/gwt-base/Messaging.html");
Document.get().getBody().appendChild(iframe1);
final Button button = new Button("Test");
final MessagePort globalPort = MessagePort.getFromIframe(iframe1);
button.addClickHandler(e -> {
globalPort.postMessage("Hello iFrame!", "*");
});
RootPanel.get().add(button);
}
}