1 // Copyright 2003 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 abstract class Platform {
22 public Platform() { platform = this; }
24 // Static Data /////////////////////////////////////////////////////////////////////////////////////
26 static boolean clipboardReadEnabled = false; ///< true iff inside a C-v/A-v/Press3 trap handler
27 static Platform platform = null; ///< The appropriate Platform object for this JVM
28 static boolean alreadyDetectedProxy = false; ///< true if proxy autodetection has already been run
29 static org.xwt.HTTP.Proxy cachedProxyInfo = null; ///< the result of proxy autodetection
30 public static String build = "unknown"; ///< the current build
32 // VM Detection Logic /////////////////////////////////////////////////////////////////////
34 public static void forceLoad() { } ///< do-nothing method that forces <clinit> to run
36 // If you create a new subclass of Platform, you should add logic
37 // here to detect it. Do not reference your class directly -- use
41 System.err.println("Detecting JVM...");
43 String vendor = System.getProperty("java.vendor", "");
44 String version = System.getProperty("java.version", "");
45 String os_name = System.getProperty("os.name", "");
46 String os_version = System.getProperty("os.version", "");
47 String platform_class = null;
49 if (os_name.startsWith("Darwin")) platform_class = "Darwin";
50 else if (vendor.startsWith("Free Software Foundation")) {
51 if (os_name.startsWith("Window")) platform_class = "Win32";
52 else platform_class = "X11";
53 } else if (version.startsWith("1.1") && vendor.startsWith("Netscape")) platform_class = "Netscape";
54 else if (version.startsWith("1.1") && vendor.startsWith("Microsoft")) platform_class = "Microsoft";
55 else if (!version.startsWith("1.0") && !version.startsWith("1.1")) platform_class = "Java2";
57 // Disable 2d hardware acceleration on Jaguar (do we need this?)
58 // if (os_name.equals("Mac OS X") && os_version.startsWith("10.2")) System.setProperty("com.apple.hwaccel", "false");
59 //System.setProperty("com.apple.hwaccel", "false");
61 if (platform_class != null)
62 Class.forName("org.xwt.plat." + platform_class).newInstance();
64 String term = Platform.getEnv("TERM");
65 Log.color = term != null && term.length() != 0 && !term.equals("cygwin");
68 build = (String)Class.forName("org.xwt.Build").getField("build").get(null);
69 } catch (ClassNotFoundException cnfe) {
70 } catch (Exception e) {
71 if (Log.on) Log.info(Platform.class, "exception while detecting build:");
72 if (Log.on) Log.info(Platform.class, e);
74 if (Log.on) Log.diag(Platform.class, "XWT build: " + build);
76 if (Log.on) Log.diag(Platform.class, "XWT VM detection: vendor = " + vendor);
77 if (Log.on) Log.diag(Platform.class, " version = " + version);
78 if (Log.on) Log.diag(Platform.class, " os = " + os_name + " [version " + os_version + "]");
80 if (platform_class == null) {
81 if (Log.on) Log.info(Platform.class, "Unable to detect JVM");
82 criticalAbort("Unable to detect JVM");
85 if (Log.on) Log.diag(Platform.class, " platform = " + platform.getDescriptiveName());
86 if (Log.on) Log.diag(Platform.class, " class = " + platform.getClass().getName());
89 } catch (Exception e) {
90 if (Log.on) Log.info(Platform.class, "Exception while trying to detect JVM");
91 if (Log.on) Log.info(Platform.class, e);
92 criticalAbort("Unable to detect JVM");
98 // Methods to be Overridden ///////////////////////////////////////////////////////////////////
100 /** a string describing the VM */
101 protected String getDescriptiveName() { return "Generic Java 1.1 VM"; }
103 /** invoked after initialization messages have been printed; useful for additional platform detection log messages */
104 protected void postInit() { }
106 protected Surface _createSurface(Box b, boolean framed) { return null; }
107 protected Picture _createPicture(Stream r) { return null; }
108 protected PixelBuffer _createPixelBuffer(int w, int h, Surface owner) { return null; }
109 protected Font.Glyph _createGlyph(org.xwt.Font f, char c) { return new DefaultGlyph(f, c); }
111 public static PixelBuffer createPixelBuffer(int w, int h, Surface s) { return platform._createPixelBuffer(w, h, s); }
112 public static Picture createPicture(Stream r) { return platform._createPicture(r); }
113 public static Font.Glyph createGlyph(org.xwt.Font f, char c) { return platform._createGlyph(f, c); }
114 public static Surface createSurface(Box b, boolean framed, boolean refreshable) {
115 Surface ret = platform._createSurface(b, framed);
116 ret.setInvisible(false);
117 ret.setLimits(b.minwidth, b.minheight, b.maxwidth, b.maxheight);
119 Surface.allSurfaces.addElement(ret);
120 ret.dirty(0, 0, b.width, b.height);
126 /** the human-readable name of the key mapped to XWT's 'alt' key */
127 public static String altKeyName() { return platform._altKeyName(); }
128 protected String _altKeyName() { return "alt"; }
130 /** returns the contents of the clipboard */
131 public static Object getClipBoard() { return clipboardReadEnabled ? platform._getClipBoard() : null; }
132 protected String _getClipBoard() { return null; }
134 /** sets the contents of the clipboard */
135 public static void setClipBoard(String s) { platform._setClipBoard(s); }
136 protected void _setClipBoard(String s) { }
138 /** returns the width of the screen, in pixels */
139 public static int getScreenWidth() { return platform._getScreenWidth(); }
140 protected int _getScreenWidth() { return 640; }
142 /** returns the height of the screen, in pixels */
143 public static int getScreenHeight() { return platform._getScreenHeight(); }
144 protected int _getScreenHeight() { return 480; }
146 /** used to notify the user of very serious failures; usually used when logging is not working or unavailable */
147 protected void _criticalAbort(String message) { System.exit(-1); }
149 /** if true, org.xwt.Surface will generate a Click automatically after a press and a release */
150 public static boolean needsAutoClick() { return platform._needsAutoClick(); }
151 protected boolean _needsAutoClick() { return false; }
153 /** if true, org.xwt.Surface will generate a DoubleClick automatically after recieving two clicks in a short period of time */
154 public static boolean needsAutoDoubleClick() { return platform._needsAutoDoubleClick(); }
155 protected boolean _needsAutoDoubleClick() { return false; }
157 /** returns true iff the platform has a case-sensitive filesystem */
158 public static boolean isCaseSensitive() { return platform._isCaseSensitive(); }
159 protected boolean _isCaseSensitive() { return true; }
161 /** returns an InputStream to the builtin xwar */
162 public static InputStream getBuiltinInputStream() { return platform._getBuiltinInputStream(); }
163 protected InputStream _getBuiltinInputStream() {
164 return this.getClass().getClassLoader().getResourceAsStream("org/xwt/builtin.jar");
167 /** returns the value of the environment variable key, or null if no such key exists */
168 public static String getEnv(String key) { return platform._getEnv(key); }
169 protected String _getEnv(String key) {
171 String os = System.getProperty("os.name").toLowerCase();
173 if (os.indexOf("windows 9") != -1 || os.indexOf("windows me") != -1) {
174 // hack -- jdk1.2/1.3 on Win32 pop open an ugly DOS box; 1.4 does not
175 if (platform.getClass().getName().endsWith("Java12")) return null;
176 p = Runtime.getRuntime().exec("command.com /c set");
177 } else if (os.indexOf("windows") > -1) {
178 // hack -- jdk1.2/1.3 on Win32 pop open an ugly DOS box; 1.4 does not
179 if (platform.getClass().getName().endsWith("Java12")) return null;
180 p = Runtime.getRuntime().exec("cmd.exe /c set");
182 p = Runtime.getRuntime().exec("env");
184 BufferedReader br = new BufferedReader(new InputStreamReader(p.getInputStream()));
186 while ((s = br.readLine()) != null)
187 if (s.startsWith(key + "="))
188 return s.substring(key.length() + 1);
189 } catch (Exception e) {
190 if (Log.on) Log.info(this, "Exception while reading from environment:");
191 if (Log.on) Log.info(this, e);
196 /** convert a JPEG into an Image */
197 public static synchronized void decodeJPEG(InputStream is, Picture p) { platform._decodeJPEG(is, p); }
198 protected abstract void _decodeJPEG(InputStream is, Picture p);
200 /** displays a platform-specific "open file" dialog and returns the chosen filename, or null if the user hit cancel */
201 protected String _fileDialog(String suggestedFileName, boolean write) { return null; }
202 public static String fileDialog(String suggestedFileName, boolean write) throws org.xwt.js.JSExn {
203 return platform._fileDialog(suggestedFileName, write);
206 /** default implementation is Eric Albert's BrowserLauncher.java */
207 protected void _newBrowserWindow(String url) {
209 Class c = Class.forName("edu.stanford.ejalbert.BrowserLauncher");
210 Method m = c.getMethod("openURL", new Class[] { String.class });
211 m.invoke(null, new String[] { url });
212 } catch (Exception e) {
217 /** opens a new browser window */
218 public static void newBrowserWindow(String url) {
219 if (!(url.startsWith("https://") || url.startsWith("http://") || url.startsWith("ftp://") || url.startsWith("mailto:"))) {
220 if (Log.on) Log.info(Platform.class, "xwt.newBrowserWindow() only supports http and https urls");
224 // check the URL for well-formedness, as a defense against buffer overflow attacks
227 if (u.startsWith("https")) u = "http" + u.substring(5);
229 } catch (MalformedURLException e) {
230 if (Log.on) Log.info(Platform.class, "URL " + url + " is not well-formed");
231 if (Log.on) Log.info(Platform.class, e);
234 if (Log.on) Log.info(Platform.class, "newBrowserWindow, url = " + url);
235 platform._newBrowserWindow(url);
238 /** used to notify the user of very serious failures; usually used when logging is not working or unavailable */
239 public static void criticalAbort(String message) {
240 if (Log.on) Log.info(Platform.class, "Critical Abort:");
241 if (Log.on) Log.info(Platform.class, message);
242 platform._criticalAbort(message);
245 /** detects proxy settings */
246 protected synchronized org.xwt.HTTP.Proxy _detectProxy() { return null; }
247 public static synchronized org.xwt.HTTP.Proxy detectProxy() {
249 if (cachedProxyInfo != null) return cachedProxyInfo;
250 if (alreadyDetectedProxy) return null;
251 alreadyDetectedProxy = true;
253 if (Log.on) Log.info(Platform.class, "attempting environment-variable DNS proxy detection");
254 cachedProxyInfo = org.xwt.HTTP.Proxy.detectProxyViaManual();
255 if (cachedProxyInfo != null) return cachedProxyInfo;
257 if (Log.on) Log.info(Platform.class, "attempting " + platform.getClass().getName() + " proxy detection");
258 cachedProxyInfo = platform._detectProxy();
259 if (cachedProxyInfo != null) return cachedProxyInfo;
261 return cachedProxyInfo;
264 /** returns a Scheduler instance; used to implement platform-specific schedulers */
265 protected Scheduler _getScheduler() { return new Scheduler(); }
266 public static Scheduler getScheduler() { return platform._getScheduler(); }
268 // FEATURE: be more efficient for many of the subclasses
269 public static class DefaultGlyph extends Font.Glyph {
270 private Picture p = null;
271 public DefaultGlyph(org.xwt.Font f, char c) { super(f, c); }
272 public Picture getPicture() {
273 if (p == null && isLoaded) {
274 p = createPicture(null);
275 p.data = new int[data.length];
276 for(int i=0; i<data.length; i++) p.data[i] = (data[i] & 0xff) << 24;
278 p.width = this.width;
279 p.height = this.height;