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com.dukescript.presenters.iOS Maven / Gradle / Ivy
package com.dukescript.presenters;
/*
* #%L
* DukeScript Presenter for iOS - a library from the "DukeScript Presenters" project.
* Visit http://dukescript.com for support and commercial license.
* %%
* Copyright (C) 2015 Eppleton IT Consulting
* %%
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program. If not, see
* .
* #L%
*/
import java.io.Closeable;
import java.io.IOException;
import java.io.InterruptedIOException;
import java.io.Reader;
import java.net.URL;
import java.net.URLDecoder;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.Executor;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.netbeans.html.boot.spi.Fn;
import org.openide.util.lookup.ServiceProvider;
import org.robovm.apple.coregraphics.CGRect;
import org.robovm.apple.foundation.NSAutoreleasePool;
import org.robovm.apple.foundation.NSBundle;
import org.robovm.apple.foundation.NSError;
import org.robovm.apple.foundation.NSOperationQueue;
import org.robovm.apple.foundation.NSURL;
import org.robovm.apple.foundation.NSURLRequest;
import org.robovm.apple.uikit.UIApplication;
import org.robovm.apple.uikit.UIApplicationDelegateAdapter;
import org.robovm.apple.uikit.UIApplicationLaunchOptions;
import org.robovm.apple.uikit.UIColor;
import org.robovm.apple.uikit.UIInterfaceOrientation;
import org.robovm.apple.uikit.UIScreen;
import org.robovm.apple.uikit.UIViewAutoresizing;
import org.robovm.apple.uikit.UIViewController;
import org.robovm.apple.uikit.UIWebView;
import org.robovm.apple.uikit.UIWebViewDelegate;
import org.robovm.apple.uikit.UIWebViewDelegateAdapter;
import org.robovm.apple.uikit.UIWebViewNavigationType;
import org.robovm.apple.uikit.UIWindow;
@ServiceProvider(service = Fn.Presenter.class)
public final class iOS extends Generic
implements Executor {
static final Logger LOG = Logger.getLogger(iOS.class.getName());
private UIWebView webView;
private Thread dispatchThread;
public iOS() throws Exception {
super(true, false, "iOS", NSBundle.getMainBundle().getBundleIdentifier());
}
@Override
void log(Level level, String msg, Object... args) {
if (args.length == 1 && args[0] instanceof Throwable) {
LOG.log(level, msg, (Throwable) args[0]);
} else {
LOG.log(level, msg, args);
}
}
@Override
final void dispatch(final Runnable r) {
if (dispatchThread == Thread.currentThread()) {
r.run();
} else {
runOnUiThread(r);
}
}
@Override
public final void execute(final Runnable command) {
class CtxRun implements Runnable {
@Override
public void run() {
Closeable c = Fn.activate(iOS.this);
try {
command.run();
} finally {
try {
c.close();
} catch (IOException ex) {
iOS.this.log(Level.SEVERE, null, ex);
}
}
}
}
dispatch(new CtxRun());
}
static void runOnUiThread(Runnable w) {
NSOperationQueue mq = NSOperationQueue.getMainQueue();
mq.addOperation(w);
}
@Override
String callbackFn(String welcome) {
loadJS(
"function iOS(method, a1, a2, a3, a4) {\n"
+ " window.iOSVal = null;\n"
+ " var url = 'presenter://' + method;\n"
+ " url += '?p0=' + encodeURIComponent(a1);\n"
+ " url += '&p1=' + encodeURIComponent(a2);\n"
+ " url += '&p2=' + encodeURIComponent(a3);\n"
+ " url += '&p3=' + encodeURIComponent(a4);\n"
+ " var iframe = document.createElement('iframe');\n"
+ " iframe.setAttribute('width','1');\n"
+ " iframe.setAttribute('height','1');\n"
+ " iframe.setAttribute('frameborder',0);\n"
+ " iframe.setAttribute('style','display:none');\n"
+ " iframe.setAttribute('src', url);\n"
+ " document.documentElement.appendChild(iframe);\n"
+ " iframe.parentNode.removeChild(iframe);\n"
+ " iframe = null;\n"
+ " var r = window.iOSVal;\n"
+ " delete window.iOSVal;\n"
+ " return r;\n"
+ "}\n"
);
loadJS(welcome);
return "iOS";
}
@Override
void loadJS(String js) {
String res = webView.evaluateJavaScript(js);
LOG.log(Level.FINE, "loadJS done: {0}", res);
}
@Override
public void displayPage(URL page, Runnable onPageLoad) {
NSAutoreleasePool pool = new NSAutoreleasePool();
try {
App.mainView(page.toExternalForm(), new WebViewDelegate(onPageLoad));
} catch (RuntimeException ex) {
throw ex;
} catch (Exception ex) {
throw new IllegalStateException(ex);
}
pool.close();
}
@Override
public void loadScript(Reader code) throws Exception {
StringBuilder sb = new StringBuilder();
for (;;) {
int ch = code.read();
if (ch == -1) {
break;
}
sb.append((char) ch);
}
webView.evaluateJavaScript(sb.toString());
}
static final class App extends UIApplicationDelegateAdapter {
private static UIWindow window;
private static UIWebView webView;
private static UIWebViewDelegate delegate;
private static String page;
private static CountDownLatch waitFor;
@Override
public boolean didFinishLaunching(UIApplication application, UIApplicationLaunchOptions launchOptions) {
application.setStatusBarHidden(false);
final CGRect bounds = UIScreen.getMainScreen().getBounds();
webView = new UIWebView(bounds);
webView.setDelegate(delegate);
webView.setAutoresizingMask(UIViewAutoresizing.with(
UIViewAutoresizing.FlexibleBottomMargin,
UIViewAutoresizing.FlexibleHeight,
UIViewAutoresizing.FlexibleLeftMargin,
UIViewAutoresizing.FlexibleRightMargin,
UIViewAutoresizing.FlexibleTopMargin,
UIViewAutoresizing.FlexibleWidth
));
CGRect whole = UIScreen.getMainScreen().getBounds();
window = new UIWindow(whole);
window.setRootViewController(new UIViewController() {
@Override
public boolean prefersStatusBarHidden() {
return true;
}
@Override
public boolean shouldAutorotate() {
return true;
}
@Override
public boolean shouldAutomaticallyForwardRotationMethods() {
return false;
}
@Override
public void didRotate(UIInterfaceOrientation uiio) {
}
});
window.getRootViewController().setView(webView);
window.setBackgroundColor(UIColor.white());
window.addSubview(webView);
window.makeKeyAndVisible();
NSURLRequest req = new NSURLRequest(new NSURL(page));
webView.loadRequest(req);
waitFor.countDown();
return true;
}
static UIWebView mainView(String p, UIWebViewDelegate d) throws IOException {
page = p;
waitFor = new CountDownLatch(1);
delegate = d;
UIApplication.main(new String[]{p}, null, App.class);
try {
waitFor.await();
} catch (InterruptedException ex) {
throw new InterruptedIOException();
}
return webView;
}
}
private final class WebViewDelegate extends UIWebViewDelegateAdapter {
private final Runnable onPageLoad;
public WebViewDelegate(Runnable onPageLoad) {
this.onPageLoad = onPageLoad;
}
@Override
public boolean shouldStartLoad(UIWebView webView, NSURLRequest request, UIWebViewNavigationType navigationType) {
final String url = request.getURL().getAbsoluteString();
final String pref = "presenter://";
if (url.startsWith(pref)) {
int[] q = {url.indexOf('?')};
String method = url.substring(pref.length(), q[0]);
try {
String p0 = nextParam(url, q);
String p1 = nextParam(url, q);
String p2 = nextParam(url, q);
String p3 = nextParam(url, q);
String ret = callback(method, p0, p1, p2, p3);
if (ret != null) {
StringBuilder exec = new StringBuilder();
exec.append("window.iOSVal = ");
if (ret.startsWith("javascript:")) {
exec.append("\"");
for (int i = 0; i < ret.length(); i++) {
char ch = ret.charAt(i);
if (ch == '\n') {
exec.append("\\n");
} else if (ch == '\"') {
exec.append("\\\"");
} else if (ch < 16) {
exec.append("\\u000").append(Integer.toHexString(ch));
} else if (ch < 32) {
exec.append("\\u00").append(Integer.toHexString(ch));
} else {
exec.append(ch);
}
}
exec.append("\"");
} else {
exec.append(ret);
}
String check = webView.evaluateJavaScript(exec.toString());
LOG.log(Level.FINE, "evaluating {0} with return {1}", new Object[]{exec, check});
}
} catch (Exception ex) {
LOG.log(Level.SEVERE, "Error processing " + url, ex);
}
return false;
}
final NSURL openURL = request.getURL();
if (!openURL.isFileURL()) {
UIApplication.getSharedApplication().openURL(openURL);
return false;
}
return true;
}
private String nextParam(String text, int[] from) throws Exception {
int eq = text.indexOf('=', from[0]);
int amp = text.indexOf('&', eq);
if (amp == -1) {
amp = text.length();
}
from[0] = amp;
return URLDecoder.decode(text.substring(eq + 1, amp), "UTF-8");
}
@Override
public void didStartLoad(UIWebView webView) {
iOS.this.webView = webView;
}
@Override
public void didFailLoad(UIWebView webView, NSError error) {
iOS.this.webView = webView;
}
@Override
public void didFinishLoad(UIWebView webView) {
if (dispatchThread == null) {
execute(onPageLoad);
dispatchThread = Thread.currentThread();
}
}
}
}
