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43 package net.java.html.boot.fx;
46 import javafx.application.Platform;
47 import javafx.beans.value.ChangeListener;
48 import javafx.beans.value.ObservableValue;
49 import javafx.concurrent.Worker;
50 import javafx.scene.web.WebView;
51 import net.java.html.BrwsrCtx;
52 import net.java.html.boot.BrowserBuilder;
53 import net.java.html.js.JavaScriptBody;
54 import org.netbeans.html.boot.fx.AbstractFXPresenter;
55 import org.netbeans.html.context.spi.Contexts;
56 import org.netbeans.html.context.spi.Contexts.Id;
58 /** Utility methods to use {@link WebView} and {@link JavaScriptBody} code
59 * in existing <em>JavaFX</em> applications.
60 * This class is for those who want to instantiate their own {@link WebView},
61 * configure it manually, embed it into own <em>JavaFX</em>
62 * application and based on other events in the application
63 * {@link #runInBrowser(javafx.scene.web.WebView, java.lang.Runnable) re-execute code}
64 * inside of such {@link WebView}s.
66 * In case such detailed control is not necessary,
67 * consider using {@link BrowserBuilder}. Btw. when using the {@link BrowserBuilder}
68 * one can execute presenter in headless mode. Just specify: <code>
69 * {@link System}.{@link System#setProperty(java.lang.String, java.lang.String) setProperty}("fxpresenter.headless", "true");
73 * @author Jaroslav Tulach
76 public final class FXBrowsers {
77 private FXBrowsers() {
80 /** Enables the Java/JavaScript bridge (that supports {@link JavaScriptBody} and co.)
81 * in the provided <code>webView</code>. This method returns
82 * immediately. Once the support is active, it calls back specified
83 * method in <code>onPageLoad</code> class - the class can possibly be
84 * loaded by a different classloader (to enable replacement of
85 * methods with {@link JavaScriptBody} annotations with executable
86 * versions). The method <code>methodName</code> needs to be <code>public</code>
87 * (in a public class), <code>static</code> and take either no parameters
88 * or an array of {@link String}s.
90 * This method sets {@link WebView#getUserData()} and {@link #runInBrowser(javafx.scene.web.WebView, java.lang.Runnable)}
91 * relies on the value. Please don't alter it.
93 * Since introduction of {@link Id technology identifiers} the
94 * provided <code>args</code> strings are also passed to the
95 * {@link BrwsrCtx context} when it is being
96 * {@link Contexts#newBuilder(java.lang.Object...) created}
97 * and can influence the selection
98 * of available technologies
99 * (like {@link org.netbeans.html.json.spi.Technology},
100 * {@link org.netbeans.html.json.spi.Transfer} or
101 * {@link org.netbeans.html.json.spi.WSTransfer}).
103 * @param webView the instance of Web View to tweak
104 * @param url the URL of the HTML page to load into the view
105 * @param onPageLoad callback class with method <code>methodName</code>
106 * @param methodName the method to call when the page is loaded
107 * @param args arguments to pass to the <code>methodName</code> method
109 public static void load(
110 final WebView webView, final URL url,
111 Class<?> onPageLoad, String methodName,
114 Object[] context = new Object[args.length + 1];
115 System.arraycopy(args, 0, context, 1, args.length);
116 final Load load = new Load(webView, null);
118 BrowserBuilder.newBrowser(context).
119 loadPage(url.toExternalForm()).
121 loadClass(onPageLoad).
122 invoke(methodName, args).
126 /** Enables the Java/JavaScript bridge (that supports {@link JavaScriptBody} and co.)
127 * in the provided <code>webView</code>. This method returns
128 * immediately. Once the support is active, it calls back specified
129 * method in <code>onPageLoad</code>'s run method.
130 * This is more convenient way to initialize the webview,
131 * but it requires one to make sure
132 * all {@link JavaScriptBody} methods has been post-processed during
133 * compilation and there will be no need to instantiate new classloader.
135 * This method sets {@link WebView#getUserData()} and {@link #runInBrowser(javafx.scene.web.WebView, java.lang.Runnable)}
136 * relies on the value. Please don't alter it.
138 * @param webView the instance of Web View to tweak
139 * @param url the URL of the HTML page to load into the view
140 * @param onPageLoad callback to call when the page is ready
143 public static void load(
144 WebView webView, final URL url, Runnable onPageLoad
146 load(webView, url, onPageLoad, null);
149 /** Enables the Java/JavaScript bridge (that supports {@link JavaScriptBody} and co.)
150 * in the provided <code>webView</code>. This method returns
151 * immediately. Once the support is active, it calls back {@link Runnable#run() run}
152 * method in <code>onPageLoad</code>.
153 * This is more convenient way to initialize the webview,
154 * but it requires one to make sure
155 * all {@link JavaScriptBody} methods has been post-processed during
156 * compilation and there will be no need to instantiate new classloader.
158 * This method sets {@link WebView#getUserData()} and {@link #runInBrowser(javafx.scene.web.WebView, java.lang.Runnable)}
159 * relies on the value. Please don't alter it.
161 * @param webView the instance of Web View to tweak
162 * @param url the URL of the HTML page to load into the view
163 * @param onPageLoad callback to call when the page is ready
164 * @param loader the loader to use when constructing initial {@link BrwsrCtx} or <code>null</code>
167 public static void load(
168 WebView webView, final URL url, Runnable onPageLoad, ClassLoader loader
170 load(webView, url, onPageLoad, loader, new Object[0]);
173 /** Enables the Java/JavaScript bridge (that supports {@link JavaScriptBody} and co.)
174 * in the provided <code>webView</code>. This method returns
175 * immediately. Once the support is active, it calls back {@link Runnable#run() run}
176 * method in <code>onPageLoad</code>.
177 * This is more convenient way to initialize the webview,
178 * but it requires one to make sure
179 * all {@link JavaScriptBody} methods has been post-processed during
180 * compilation and there will be no need to instantiate new classloader.
182 * This method sets {@link WebView#getUserData()} and {@link #runInBrowser(javafx.scene.web.WebView, java.lang.Runnable)}
183 * relies on the value. Please don't alter it.
185 * @param webView the instance of Web View to tweak
186 * @param url the URL of the HTML page to load into the view
187 * @param onPageLoad callback to call when the page is ready
188 * @param loader the loader to use when constructing initial {@link BrwsrCtx} or <code>null</code>
189 * @param context additonal configuration to pass to {@link BrowserBuilder#newBrowser(java.lang.Object...)}
190 * and {@link Contexts#newBuilder(java.lang.Object...)} factory methods
193 public static void load(
194 WebView webView, final URL url, Runnable onPageLoad, ClassLoader loader,
197 Object[] newCtx = new Object[context.length + 1];
198 System.arraycopy(context, 0, newCtx, 1, context.length);
199 final Load load = new Load(webView, onPageLoad);
201 BrowserBuilder.newBrowser(newCtx).
202 loadPage(url.toExternalForm()).
208 /** Executes a code inside of provided {@link WebView}. This method
209 * associates the {@link BrwsrCtx execution context} with provided browser,
210 * so the {@link JavaScriptBody} annotations know where to execute
211 * their JavaScript bodies.
212 * The code is going to be executed synchronously
213 * in case {@link Platform#isFxApplicationThread()} returns <code>true</code>.
214 * Otherwise this method returns immediately and the code is executed
215 * later via {@link Platform#runLater(java.lang.Runnable)}.
217 * This method relies on {@link WebView#getUserData()} being properly
218 * provided by the <code>load</code> methods in this class.
220 * @param webView the web view previously prepared by one of the <code>load</code>
221 * methods in this class
222 * @param code the code to execute
223 * @throws IllegalArgumentException if the web view was not properly
225 * @see BrwsrCtx#execute(java.lang.Runnable)
228 public static void runInBrowser(WebView webView, Runnable code) {
229 Object ud = webView.getUserData();
230 if (!(ud instanceof Load)) {
231 throw new IllegalArgumentException();
233 ((Load)ud).ctx.execute(code);
236 private static class Load extends AbstractFXPresenter implements Runnable {
237 private final WebView webView;
238 private final Runnable myLoad;
239 private BrwsrCtx ctx;
241 public Load(WebView webView, Runnable onLoad) {
242 this.webView = webView;
243 this.myLoad = onLoad;
244 webView.setUserData(this);
248 ctx = BrwsrCtx.findDefault(Load.class);
249 if (myLoad != null) {
255 protected void waitFinished() {
260 protected WebView findView(final URL resource) {
261 final Worker<Void> w = webView.getEngine().getLoadWorker();
262 w.stateProperty().addListener(new ChangeListener<Worker.State>() {
263 private String previous;
266 public void changed(ObservableValue<? extends Worker.State> ov, Worker.State t, Worker.State newState) {
267 if (newState.equals(Worker.State.SUCCEEDED)) {
272 if (newState.equals(Worker.State.FAILED)) {
274 throw new IllegalStateException("Failed to load " + resource);
278 private boolean checkValid() {
279 final String crnt = webView.getEngine().getLocation();
280 if (previous != null && !previous.equals(crnt)) {
281 w.stateProperty().removeListener(this);