1 // Copyright 2002 Adam Megacz, see the COPYING file for licensing [GPL]
4 import java.lang.reflect.*;
11 * Abstracts away the small irregularities in JVM implementations.
13 * The default Platform class supports a vanilla JDK 1.1
14 * JVM. Subclasses are provided for other VMs. Methods whose names
15 * start with an underscore are meant to be overridden by
16 * subclasses. If you create a subclass of Platform, you should put
17 * it in the org.xwt.plat package, and add code to this file's static
18 * block to detect the new platform.
20 public class Platform {
22 // Static Data /////////////////////////////////////////////////////////////////////////////////////
25 * set to true during the delivery of a KeyPressed:C-v/A-v or Press3; it is safe to use a
26 * 'global' here, since message delivery is single-threaded and non-preemptable
28 static boolean clipboardReadEnabled = false;
30 /** The appropriate Platform object for this JVM */
31 static Platform platform = null;
33 /** true if proxy autodetection has already been run */
34 static boolean alreadyDetectedProxy = false;
36 /** the result of proxy autodetection */
37 static Proxy cachedProxyInfo = null;
39 /** the current build */
40 public static String build = "unknown";
42 // VM Detection Logic /////////////////////////////////////////////////////////////////////
44 /** do-nothing method that forces <clinit> to run */
45 public static void forceLoad() { }
47 // If you create a new subclass of Platform, you should add logic
48 // here to detect it. Do not reference your class directly -- use
52 System.err.println("Detecting JVM...");
54 String vendor = System.getProperty("java.vendor", "");
55 String version = System.getProperty("java.version", "");
56 String os_name = System.getProperty("os.name", "");
57 String os_version = System.getProperty("os.version", "");
58 String platform_class = null;
60 if (os_name.startsWith("Darwin")) platform_class = "Darwin";
61 else if (vendor.startsWith("Free Software Foundation")) {
62 if (os_name.startsWith("Window")) platform_class = "Win32";
63 else platform_class = "X11";
64 } else if (version.startsWith("1.1") && vendor.startsWith("Netscape")) platform_class = "Netscape";
65 else if (version.startsWith("1.1") && vendor.startsWith("Microsoft")) platform_class = "Microsoft";
66 else if (!version.startsWith("1.0") && !version.startsWith("1.1")) platform_class = "Java2";
69 // Disable 2d hardware acceleration on Jaguar
70 if (os_name.equals("Mac OS X") && os_version.equals("10.2"))
72 System.setProperty("com.apple.hwaccel", "false");
74 if (platform_class != null) {
75 platform = (Platform)Class.forName("org.xwt.plat." + platform_class).newInstance();
80 build = (String)Class.forName("org.xwt.Build").getField("build").get(null);
81 } catch (ClassNotFoundException cnfe) {
82 } catch (Exception e) {
83 if (Log.on) Log.log(Platform.class, "exception while detecting build:");
84 if (Log.on) Log.log(Platform.class, e);
86 if (Log.on) Log.log(Platform.class, "XWT build: " + build);
88 if (Log.on) Log.log(Platform.class, "XWT VM detection: vendor = " + vendor);
89 if (Log.on) Log.log(Platform.class, " version = " + version);
90 if (Log.on) Log.log(Platform.class, " os = " + os_name + " [version " + os_version + "]");
92 if (platform_class == null) {
93 if (Log.on) Log.log(Platform.class, "Unable to detect JVM");
94 new Platform().criticalAbort("Unable to detect JVM");
97 if (Log.on) Log.log(Platform.class, " platform = " + platform.getDescriptiveName());
98 if (Log.on) Log.log(Platform.class, " class = " + platform.getClass().getName());
101 } catch (Exception e) {
102 if (Log.on) Log.log(Platform.class, "Exception while trying to detect JVM");
103 if (Log.on) Log.log(Platform.class, e);
104 new Platform().criticalAbort("Unable to detect JVM");
110 // Methods to be Overridden ////////////////////////////////////////////////////////////////////
112 /** a string describing the VM */
113 protected String getDescriptiveName() { return "Generic Java 1.1 VM"; }
115 /** this initializes the platform; code in here can invoke methods on Platform since Platform.platform has already been set */
116 protected void init() { }
117 protected void postInit() { }
119 /** creates and returns a doublebuffer 'belonging' to <tt>owner</tt>; we need to associate DoubleBuffers to surfaces
120 * due to AWT 1.1 requirements (definately for Navigator, possibly also for MSJVM).
122 protected DoubleBuffer _createDoubleBuffer(int w, int h, Surface owner) { return null; }
124 /** creates and returns a new surface */
125 protected Surface _createSurface(Box b, boolean framed) { return null; }
127 /** creates a socket object */
128 protected Socket _getSocket(String host, int port, boolean ssl, boolean negotiate) throws IOException {
129 Socket ret = ssl ? new TinySSL(host, port, negotiate) : new Socket(java.net.InetAddress.getByName(host), port);
130 ret.setTcpNoDelay(true);
134 /** creates and returns a picture */
135 protected Picture _createPicture(int[] b, int w, int h) { return null; }
137 /** should return true if it is safe to supress full-surface dirties immediately after a window resize */
138 protected boolean _supressDirtyOnResize() { return false; }
140 /** the human-readable name of the key mapped to XWT's 'alt' key */
141 protected String _altKeyName() { return "alt"; }
143 /** opens a connection to the resource identified by URL u, and returns an InputStream */
144 protected InputStream _urlToInputStream(URL u) throws IOException { return u.openStream(); }
146 /** returns the contents of the clipboard */
147 protected String _getClipBoard() { return null; }
149 /** sets the contents of the clipboard */
150 protected void _setClipBoard(String s) { }
152 /** returns the width of the screen, in pixels */
153 protected int _getScreenWidth() { return 640; }
155 /** returns the height of the screen, in pixels */
156 protected int _getScreenHeight() { return 480; }
158 /** returns the width of a string in a platform-specific font */
159 protected int _stringWidth(String font, String text) { return 10 * text.length(); }
161 /** returns the maximum ascent of all glyphs in a given platform-specific font */
162 protected int _getMaxAscent(String font) { return 10; }
164 /** returns the maximum descent of all glyphs in a given platform-specific font */
165 protected int _getMaxDescent(String font) { return 2; }
167 /** returns a list of all platform-specific fonts available */
168 protected String[] _listFonts() { return new String[] { }; }
170 /** returns the maximum number of threads that the XWT engine can create without adversely affecting the host OS */
171 protected int _maxThreads() { return 25; }
173 /** creates a weak reference */
174 protected org.xwt.Weak _getWeak(final Object o) {
175 return new org.xwt.Weak() {
176 public Object get() { return o; }
180 /** Called once XWT is initialized and the application is running. */
181 protected void _running() {}
184 protected void _exit() { System.exit(0); }
186 /** used to notify the user of very serious failures; usually used when logging is not working or unavailable */
187 protected void _criticalAbort(String message) { _exit(); }
189 /** used to notify the user of very serious failures; usually used when logging is not working or unavailable */
190 protected String _getDefaultFont() { return "sansserif10"; }
192 /** if true, org.xwt.Surface will generate a Click automatically after a press and a release */
193 protected boolean _needsAutoClick() { return false; }
195 /** if true, org.xwt.Surface will generate a DoubleClick automatically after recieving two clicks in a short period of time */
196 protected boolean _needsAutoDoubleClick() { return false; }
198 protected void _newBrowserWindow(String url) {
199 if (Log.on) Log.log(this, "Platform " + platform.getClass().getName() + " cannot open browser windows");
203 /** Returns null if XWT should always use direct connection; otherwise returns a ProxyInfo object with proxy settings */
204 protected synchronized Proxy _detectProxy() { return null; }
206 /** displays a platform-specific "open file" dialog and returns the chosen filename, or null if the user hit cancel */
207 protected String _fileDialog(String suggestedFileName, boolean write) { return null; }
209 /** returns true iff the platform has a case-sensitive filesystem */
210 protected boolean _isCaseSensitive() { return true; }
212 /** returns an InputStream to the builtin xwar */
213 protected InputStream _getBuiltinInputStream() {
215 return new FileInputStream("builtin.xwar");
217 return new ByteArrayInputStream(org.bouncycastle.util.encoders.Base64.decode(org.xwt.Builtin.encoded));
219 } catch (Exception e) {
225 /** returns the value of the environment variable key, or null if no such key exists */
226 protected String _getEnv(String key) {
228 String os = System.getProperty("os.name").toLowerCase();
230 if (os.indexOf("windows 9") != -1 || os.indexOf("windows me") != -1) {
231 // hack -- jdk1.2/1.3 on Win32 pop open an ugly DOS box; 1.4 does not
232 if (platform.getClass().getName().endsWith("Java12")) return null;
233 p = Runtime.getRuntime().exec("command.com /c set");
234 } else if (os.indexOf("windows") > -1) {
235 // hack -- jdk1.2/1.3 on Win32 pop open an ugly DOS box; 1.4 does not
236 if (platform.getClass().getName().endsWith("Java12")) return null;
237 p = Runtime.getRuntime().exec("cmd.exe /c set");
239 p = Runtime.getRuntime().exec("env");
241 BufferedReader br = new BufferedReader(new InputStreamReader(p.getInputStream()));
243 while ((s = br.readLine()) != null)
244 if (s.startsWith(key + "="))
245 return s.substring(key.length() + 1);
246 } catch (Exception e) {
247 if (Log.on) Log.log(this, "Exception while reading from environment:");
248 if (Log.on) Log.log(this, e);
253 /** convert a JPEG into an Image */
254 protected ImageDecoder _decodeJPEG(InputStream is, String name) { return null; }
257 // Static methods -- thunk to the instance /////////////////////////////////////////////////////////////////////////
259 /** if true, org.xwt.Surface should generate Click messages automatically when a Release happens after a Press and the mouse has not moved much */
260 public static boolean needsAutoClick() { return platform._needsAutoClick(); }
262 /** if true, org.xwt.Surface should generate DoubleClick messages automatically when needed */
263 public static boolean needsAutoDoubleClick() { return platform._needsAutoDoubleClick(); }
265 /** should return true if it is safe to supress full-surface dirties immediately after a window resize */
266 public static String getDefaultFont() { return platform._getDefaultFont(); }
268 /** should return true if it is safe to supress full-surface dirties immediately after a window resize */
269 public static boolean supressDirtyOnResize() { return platform._supressDirtyOnResize(); }
271 /** returns the width of a string in a platform-specific font */
272 public static int stringWidth(String font, String text) { return platform._stringWidth(font, text); }
274 /** returns the maximum ascent of all glyphs in a given platform-specific font */
275 public static int getMaxAscent(String font) { return platform._getMaxAscent(font); }
277 /** returns the maximum descent of all glyphs in a given platform-specific font. Three pixel minimum ensures space for underline. */
278 public static int getMaxDescent(String font) { return Math.max(3, platform._getMaxDescent(font)); }
280 /** returns the maximum number of threads that the XWT engine can create without adversely affecting the host OS */
281 public static int maxThreads() { return platform._maxThreads(); }
283 /** returns a list of all platform-specific fonts available */
284 public static String[] listFonts() { return platform._listFonts(); }
286 /** creates a weak reference */
287 public static org.xwt.Weak getWeak(Object o) { return platform._getWeak(o); }
289 /** opens a connection to the resource identified by URL u, and returns an InputStream */
290 public static InputStream urlToInputStream(URL u) throws IOException { return platform._urlToInputStream(u); }
292 /** returns the contents of the clipboard */
293 public static Object getClipBoard() { return clipboardReadEnabled ? platform._getClipBoard() : null; }
295 /** sets the contents of the clipboard */
296 public static void setClipBoard(String s) { platform._setClipBoard(s); }
298 /** creates a socket object, with or without ssl encryption */
299 public static Socket getSocket(String host, int port, boolean ssl, boolean negotiate) throws IOException {
300 return platform._getSocket(host, port, ssl, negotiate);
303 /** returns the width of the screen, in pixels */
304 public static int getScreenWidth() { return platform._getScreenWidth(); }
306 /** returns the height of the screen, in pixels */
307 public static int getScreenHeight() { return platform._getScreenHeight(); }
309 /** creates and returns a doublebuffer 'belonging' to <tt>owner</tt> */
310 public static DoubleBuffer createDoubleBuffer(int w, int h, Surface s) { return platform._createDoubleBuffer(w, h, s); }
312 /** creates and returns a picture */
313 public static Picture createPicture(int[] data, int w, int h) { return platform._createPicture(data, w, h); }
315 /** returns an InputStream to the builtin xwar */
316 public static InputStream getBuiltinInputStream() { return platform._getBuiltinInputStream(); }
318 /** creates and returns a picture */
319 public static Picture createPicture(ImageDecoder i) { return platform._createPicture(i.getData(), i.getWidth(), i.getHeight()); }
321 /** returns true iff the platform has a case-sensitive filesystem */
322 public static boolean isCaseSensitive() { return platform._isCaseSensitive(); }
324 /** returns the value of the environment variable key, or null if no such key exists */
325 public static String getEnv(String key) { return platform._getEnv(key); }
327 /** displays a platform-specific "open file" dialog and returns the chosen filename, or null if the user hit cancel */
328 public static String fileDialog(String suggestedFileName, boolean write) {
329 if (!ThreadMessage.suspendThread()) return null;
331 return platform._fileDialog(suggestedFileName, write);
333 ThreadMessage.resumeThread();
337 /** opens a new browser window */
338 public static void newBrowserWindow(String url) {
339 if (!(url.startsWith("https://") || url.startsWith("http://") || url.startsWith("ftp://") || url.startsWith("mailto:"))) {
340 if (Log.on) Log.log(Platform.class, "xwt.newBrowserWindow() only supports http and https urls");
344 // check the URL for well-formedness, as a defense against buffer overflow attacks
347 if (u.startsWith("https")) u = "http" + u.substring(5);
349 } catch (MalformedURLException e) {
350 if (Log.on) Log.log(Platform.class, "URL " + url + " is not well-formed");
351 if (Log.on) Log.log(Platform.class, e);
354 if (Log.on) Log.log(Platform.class, "newBrowserWindow, url = " + url);
355 platform._newBrowserWindow(url);
358 /** Called once XWT is initialized and the application is running. */
359 public static void running() {
360 Log.log(Platform.class, "XWT is running");
365 public static void exit() {
366 Log.log(Platform.class, "exiting via Platform.exit()");
370 /** the human-readable name of the key mapped to XWT's 'alt' key */
371 public static String altKeyName() { return platform._altKeyName(); }
373 /** used to notify the user of very serious failures; usually used when logging is not working or unavailable */
374 public static void criticalAbort(String message) {
375 if (Log.on) Log.log(Platform.class, "Critical Abort:");
376 if (Log.on) Log.log(Platform.class, message);
377 platform._criticalAbort(message);
380 /** this method invokes the platform _createSurface() method and then enforces a few post-call invariants */
381 public static Surface createSurface(Box b, boolean framed, boolean refreshable) {
382 Surface ret = platform._createSurface(b, framed);
383 ret.setInvisible(b.invisible);
384 b.width = b.height < Surface.scarPicture.getWidth() ? Surface.scarPicture.getWidth() : b.width;
385 b.height = b.height < Surface.scarPicture.getHeight() ? Surface.scarPicture.getHeight() : b.height;
387 Object titlebar = b.get("titlebar", true);
388 if (titlebar != null) ret.setTitleBarText(titlebar.toString());
390 Object icon = b.get("icon", true);
391 if (icon != null && !"".equals(icon)) {
392 Picture pic = ImageDecoder.getPicture(icon.toString());
393 if (pic != null) ret.setIcon(pic);
394 else if (Log.on) Log.log(Platform.class, "unable to load icon " + icon);
397 ret.setLimits(b.minwidth, b.minheight, b.maxwidth, b.maxheight);
400 Surface.refreshableSurfaceWasCreated = true;
401 Surface.allSurfaces.addElement(ret);
402 ret.dirty(0, 0, b.width, b.height);
408 /** detects proxy settings */
409 public static synchronized Proxy detectProxy() {
411 if (cachedProxyInfo != null) return cachedProxyInfo;
412 if (alreadyDetectedProxy) return null;
413 alreadyDetectedProxy = true;
415 if (Log.on) Log.log(Platform.class, "attempting environment-variable DNS proxy detection");
416 cachedProxyInfo = Proxy.detectProxyViaManual();
417 if (cachedProxyInfo != null) return cachedProxyInfo;
419 if (Log.on) Log.log(Platform.class, "attempting " + platform.getClass().getName() + " proxy detection");
420 cachedProxyInfo = platform._detectProxy();
421 if (cachedProxyInfo != null) return cachedProxyInfo;
423 return cachedProxyInfo;
426 public static synchronized ImageDecoder decodeJPEG(InputStream is, String name) {
427 return platform._decodeJPEG(is, name);
430 // Helpful font parsing stuff //////////////////////////////////////////////////////
432 public static class ParsedFont {
433 public ParsedFont() { }
434 public ParsedFont(String s) { parse(s); }
435 public int size = 10;
436 public String name = "";
438 public boolean italic = false;
439 public boolean bold = false;
440 public boolean underline = false;
441 public boolean dotted_underline = false;
443 private static int stoi(Object o) {
444 if (o == null) return 0;
445 if (o instanceof Integer) return ((Integer)o).intValue();
447 String s = o.toString();
448 try { return Integer.parseInt(s.indexOf('.') == -1 ? s : s.substring(0, s.indexOf('.'))); }
449 catch (NumberFormatException e) { return 0; }
452 public void parse(String font) {
454 while(i < font.length() && !Character.isDigit(font.charAt(i)) && font.charAt(i) != '*') i++;
455 name = font.substring(0, i).toLowerCase().replace('_', ' ');
460 dotted_underline = false;
461 if (i != font.length()) {
462 if (font.charAt(i) == '*') {
467 while (j < font.length() && Character.isDigit(font.charAt(j))) j++;
468 if (i != j) size = stoi(font.substring(i, j));
471 while(i < font.length()) {
472 switch (font.charAt(i)) {
473 case 'b': bold = true; break;
474 case 'i': italic = true; break;
475 case 'd': dotted_underline = true; break;
476 case 'u': underline = true; break;