--- /dev/null
+// Copyright 2004 Adam Megacz, see the COPYING file for licensing [GPL]
+package org.ibex;
+
+import java.lang.reflect.*;
+import java.net.*;
+import java.io.*;
+import org.ibex.js.*;
+import org.ibex.util.*;
+
+/**
+ * Abstracts away the small irregularities in JVM implementations.
+ *
+ * The default Platform class supports a vanilla JDK 1.1
+ * JVM. Subclasses are provided for other VMs. Methods whose names
+ * start with an underscore are meant to be overridden by
+ * subclasses. If you create a subclass of Platform, you should put
+ * it in the org.ibex.plat package, and add code to this file's static
+ * block to detect the new platform.
+ */
+public abstract class Platform {
+
+ public Platform() { platform = this; }
+
+ // Static Data /////////////////////////////////////////////////////////////////////////////////////
+
+ static boolean clipboardReadEnabled = false; ///< true iff inside a C-v/A-v/Press3 trap handler
+ static Platform platform = null; ///< The appropriate Platform object for this JVM
+ static boolean alreadyDetectedProxy = false; ///< true if proxy autodetection has already been run
+ static org.ibex.HTTP.Proxy cachedProxyInfo = null; ///< the result of proxy autodetection
+ public static String build = "unknown"; ///< the current build
+
+ // VM Detection Logic /////////////////////////////////////////////////////////////////////
+
+ // If you create a new subclass of Platform, you should add logic
+ // here to detect it. Do not reference your class directly -- use
+ // reflection.
+
+ public static void forceLoad() {
+ System.err.print("Detecting JVM...");
+ try {
+ String vendor = System.getProperty("java.vendor", "");
+ String version = System.getProperty("java.version", "");
+ String os_name = System.getProperty("os.name", "");
+ String os_version = System.getProperty("os.version", "");
+ String platform_class = null;
+
+ if (vendor.startsWith("Free Software Foundation")) {
+ if (os_name.startsWith("Window")) platform_class = "Win32";
+ else if (os_name.startsWith("Linux")) platform_class = "Linux";
+ else if (os_name.startsWith("SunOS")) platform_class = "Solaris";
+ else if (os_name.startsWith("Solaris")) platform_class = "Solaris";
+ else if (os_name.startsWith("Darwin")) platform_class = "Darwin";
+ else platform_class = "X11";
+ }
+ else if (!version.startsWith("1.0") && !version.startsWith("1.1")) platform_class = "Java2";
+
+ if (platform_class == null) {
+ Log.error(Platform.class, "Unable to detect JVM");
+ criticalAbort("Unable to detect JVM");
+ }
+
+ System.err.println(" " + os_name + " ==> org.ibex.plat." + platform_class);
+ try {
+ if (platform_class != null) Class.forName("org.ibex.plat." + platform_class).newInstance();
+ } catch (InstantiationException e) {
+ throw e.getCause();
+ }
+
+ String term = Platform.getEnv("TERM");
+ Log.color = term != null && term.length() != 0 && !term.equals("cygwin");
+
+ try {
+ build = (String)Class.forName("org.ibex.Build").getField("build").get(null);
+ Log.diag(Platform.class, "Ibex build: " + build);
+ } catch (ClassNotFoundException cnfe) {
+ Log.warn(Platform.class, "Ibex build: unknown");
+ } catch (Exception e) {
+ Log.info(Platform.class, "exception while detecting build:");
+ Log.info(Platform.class, e);
+ }
+
+ Log.diag(Platform.class, "Ibex VM detection: vendor = " + vendor);
+ Log.diag(Platform.class, " version = " + version);
+ Log.diag(Platform.class, " os = " + os_name + " [version " + os_version + "]");
+ Log.diag(Platform.class, " platform = " + platform.getDescriptiveName());
+ Log.diag(Platform.class, " class = " + platform.getClass().getName());
+ platform.postInit();
+
+ } catch (Throwable e) {
+ Log.error(Platform.class, "Exception while trying to detect JVM");
+ Log.error(Platform.class, e);
+ criticalAbort("Unable to detect JVM");
+ }
+
+ }
+
+
+ // Methods to be Overridden ///////////////////////////////////////////////////////////////////
+
+ protected Surface _createSurface(Box b, boolean framed) { return null; }
+ protected Picture _createPicture(JS r) { return null; }
+ protected PixelBuffer _createPixelBuffer(int w, int h, Surface owner) { return null; }
+ protected Font.Glyph _createGlyph(org.ibex.Font f, char c) { return new DefaultGlyph(f, c); }
+
+ public static PixelBuffer createPixelBuffer(int w, int h, Surface s) { return platform._createPixelBuffer(w, h, s); }
+ public static Picture createPicture(JS r) { return platform._createPicture(r); }
+ public static Font.Glyph createGlyph(org.ibex.Font f, char c) { return platform._createGlyph(f, c); }
+ public static Surface createSurface(Box b, boolean framed, boolean refreshable) {
+ Surface ret = platform._createSurface(b, framed);
+ ret.setInvisible(false);
+ if (refreshable) {
+ Surface.allSurfaces.addElement(ret);
+ ret.dirty(0, 0, b.width, b.height);
+ ret.Refresh();
+ }
+ try {
+ if (b.get("titlebar") != null) ret.setTitleBarText((String)b.get("titlebar"));
+ } catch (JSExn e) {
+ Log.warn(Platform.class, e);
+ }
+ return ret;
+ }
+
+ /** a string describing the VM */
+ protected String getDescriptiveName() { return "Generic Java 1.1 VM"; }
+
+ /** invoked after initialization messages have been printed; useful for additional platform detection log messages */
+ protected void postInit() { }
+
+ /** the human-readable name of the key mapped to Ibex's 'alt' key */
+ public static String altKeyName() { return platform._altKeyName(); }
+ protected String _altKeyName() { return "alt"; }
+
+ /** returns the contents of the clipboard */
+ public static Object getClipBoard() { return clipboardReadEnabled ? platform._getClipBoard() : null; }
+ protected String _getClipBoard() { return null; }
+
+ /** sets the contents of the clipboard */
+ public static void setClipBoard(String s) { platform._setClipBoard(s); }
+ protected void _setClipBoard(String s) { }
+
+ /** returns the width of the screen, in pixels */
+ public static int getScreenWidth() { return platform._getScreenWidth(); }
+ protected int _getScreenWidth() { return 640; }
+
+ /** returns the height of the screen, in pixels */
+ public static int getScreenHeight() { return platform._getScreenHeight(); }
+ protected int _getScreenHeight() { return 480; }
+
+ /** used to notify the user of very serious failures; usually used when logging is not working or unavailable */
+ protected void _criticalAbort(String message) { System.exit(-1); }
+ public static void criticalAbort(String message) {
+ Log.info(Platform.class, "Critical Abort:");
+ Log.info(Platform.class, message);
+ platform._criticalAbort(message);
+ }
+
+ /** if true, org.ibex.Surface will generate a Click automatically after a press and a release */
+ public static boolean needsAutoClick() { return platform._needsAutoClick(); }
+ protected boolean _needsAutoClick() { return false; }
+
+ /** if true, org.ibex.Surface will generate a DoubleClick automatically after recieving two clicks in a short period of time */
+ public static boolean needsAutoDoubleClick() { return platform._needsAutoDoubleClick(); }
+ protected boolean _needsAutoDoubleClick() { return false; }
+
+ /** returns true iff the platform has a case-sensitive filesystem */
+ public static boolean isCaseSensitive() { return platform._isCaseSensitive(); }
+ protected boolean _isCaseSensitive() { return true; }
+
+ /** returns an InputStream to the builtin xwar */
+ public static InputStream getBuiltinInputStream() { return platform._getBuiltinInputStream(); }
+ protected InputStream _getBuiltinInputStream() {return getClass().getClassLoader().getResourceAsStream("org/ibex/builtin.jar");}
+
+ /** returns the value of the environment variable key, or null if no such key exists */
+ public static String getEnv(String key) { return platform._getEnv(key); }
+ protected String _getEnv(String key) {
+ try {
+ String os = System.getProperty("os.name").toLowerCase();
+ Process p;
+ if (os.indexOf("windows 9") != -1 || os.indexOf("windows me") != -1) {
+ // hack -- jdk1.2/1.3 on Win32 pop open an ugly DOS box; 1.4 does not
+ if (platform.getClass().getName().endsWith("Java12")) return null;
+ p = Runtime.getRuntime().exec("command.com /c set");
+ } else if (os.indexOf("windows") > -1) {
+ // hack -- jdk1.2/1.3 on Win32 pop open an ugly DOS box; 1.4 does not
+ if (platform.getClass().getName().endsWith("Java12")) return null;
+ p = Runtime.getRuntime().exec("cmd.exe /c set");
+ } else {
+ p = Runtime.getRuntime().exec("env");
+ }
+ BufferedReader br = new BufferedReader(new InputStreamReader(p.getInputStream()));
+ String s;
+ while ((s = br.readLine()) != null)
+ if (s.startsWith(key + "="))
+ return s.substring(key.length() + 1);
+ } catch (Exception e) {
+ Log.info(this, "Exception while reading from environment:");
+ Log.info(this, e);
+ }
+ return null;
+ }
+
+ /** convert a JPEG into an Image */
+ public static synchronized void decodeJPEG(InputStream is, Picture p) { platform._decodeJPEG(is, p); }
+ protected abstract void _decodeJPEG(InputStream is, Picture p);
+
+ /** displays a platform-specific "open file" dialog and returns the chosen filename, or null if the user hit cancel */
+ protected String _fileDialog(String suggestedFileName, boolean write) { return null; }
+ public static String fileDialog(String suggestedFileName, boolean write) throws org.ibex.js.JSExn {
+ return platform._fileDialog(suggestedFileName, write);
+ }
+
+ /** default implementation is Eric Albert's BrowserLauncher.java */
+ protected void _newBrowserWindow(String url) {
+ try {
+ Class c = Class.forName("edu.stanford.ejalbert.BrowserLauncher");
+ Method m = c.getMethod("openURL", new Class[] { String.class });
+ m.invoke(null, new String[] { url });
+ } catch (Exception e) {
+ Log.warn(this, "exception trying to open a browser window");
+ Log.warn(this, e);
+ }
+ }
+
+ /** opens a new browser window */
+ public static void newBrowserWindow(String url) {
+ if (!(url.startsWith("https://") || url.startsWith("http://") || url.startsWith("ftp://") || url.startsWith("mailto:"))) {
+ Log.info(Platform.class, "ibex.newBrowserWindow() only supports http and https urls");
+ return;
+ }
+ // check the URL for well-formedness, as a defense against buffer overflow attacks
+ // FIXME check URL without using URL class
+ /*
+ try {
+ String u = url;
+ if (u.startsWith("https")) u = "http" + u.substring(5);
+ new URL(u);
+ } catch (MalformedURLException e) {
+ Log.info(Platform.class, "URL " + url + " is not well-formed");
+ Log.info(Platform.class, e);
+ }
+ */
+ Log.info(Platform.class, "newBrowserWindow, url = " + url);
+ platform._newBrowserWindow(url);
+ }
+
+ /** detects proxy settings */
+ protected synchronized org.ibex.HTTP.Proxy _detectProxy() { return null; }
+ public static synchronized org.ibex.HTTP.Proxy detectProxy() {
+
+ if (cachedProxyInfo != null) return cachedProxyInfo;
+ if (alreadyDetectedProxy) return null;
+ alreadyDetectedProxy = true;
+
+ Log.info(Platform.class, "attempting environment-variable DNS proxy detection");
+ cachedProxyInfo = org.ibex.HTTP.Proxy.detectProxyViaManual();
+ if (cachedProxyInfo != null) return cachedProxyInfo;
+
+ Log.info(Platform.class, "attempting " + platform.getClass().getName() + " proxy detection");
+ cachedProxyInfo = platform._detectProxy();
+ if (cachedProxyInfo != null) return cachedProxyInfo;
+
+ return cachedProxyInfo;
+ }
+
+ /** returns a Scheduler instance; used to implement platform-specific schedulers */
+ protected Scheduler _getScheduler() { return new Scheduler(); }
+ public static Scheduler getScheduler() { return platform._getScheduler(); }
+
+ // FEATURE: be more efficient for many of the subclasses
+ public static class DefaultGlyph extends Font.Glyph {
+ private Picture p = null;
+ public DefaultGlyph(org.ibex.Font f, char c) { super(f, c); }
+ public Picture getPicture() {
+ if (p == null && isLoaded) {
+ Picture p = createPicture(null);
+ p.data = new int[data.length];
+ for(int i=0; i<data.length; i++) p.data[i] = (data[i] & 0xff) << 24;
+ this.data = null;
+ p.width = this.width;
+ p.height = this.height;
+ p.isLoaded = true;
+ this.p = p;
+ }
+ return p;
+ }
+ }
+}
+
+
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