diff options
Diffstat (limited to 'java/awt/Toolkit.java')
| -rw-r--r-- | java/awt/Toolkit.java | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/java/awt/Toolkit.java b/java/awt/Toolkit.java index f2d254310..24b72de86 100644 --- a/java/awt/Toolkit.java +++ b/java/awt/Toolkit.java @@ -39,6 +39,7 @@ exception statement from your version. */ package java.awt; +import gnu.classpath.SystemProperties; import gnu.java.awt.peer.GLightweightPeer; import java.awt.datatransfer.Clipboard; @@ -79,11 +80,16 @@ import java.awt.peer.TextFieldPeer; import java.awt.peer.WindowPeer; import java.beans.PropertyChangeListener; import java.beans.PropertyChangeSupport; +import java.io.File; +import java.io.FileInputStream; import java.net.URL; +import java.security.AccessController; +import java.security.PrivilegedAction; import java.util.ArrayList; import java.util.Hashtable; import java.util.Map; import java.util.Properties; +import java.util.StringTokenizer; /** * The AWT system uses a set of native peer objects to implement its @@ -538,6 +544,8 @@ public abstract class Toolkit throw new AWTError(toolkit_name + " is not a subclass of " + "java.awt.Toolkit"); toolkit = (Toolkit) obj; + + initAccessibility(); return toolkit; } catch (ThreadDeath death) @@ -1219,4 +1227,138 @@ public abstract class Toolkit */ public abstract Map<TextAttribute,?> mapInputMethodHighlight(InputMethodHighlight highlight); + + /** + * Initializes the accessibility framework. In particular, this loads the + * properties javax.accessibility.screen_magnifier_present and + * javax.accessibility.screen_reader_present and loads + * the classes specified in javax.accessibility.assistive_technologies. + */ + private static void initAccessibility() + { + AccessController.doPrivileged + (new PrivilegedAction() + { + public Object run() + { + Properties props = new Properties(); + String sep = File.separator; + + // Try the user configuration. + try + { + File propsFile = new File(System.getProperty("user.home") + sep + + ".accessibility.properties"); + FileInputStream in = new FileInputStream(propsFile); + props.load(in); + in.close(); + } + catch (Exception ex) + { + // User configuration not present, ignore. + } + + // Try the system configuration if there was no user configuration. + if (props.size() == 0) + { + try + { + File propsFile = + new File(System.getProperty("gnu.classpath.home.url") + + sep + "accessibility.properties"); + FileInputStream in = new FileInputStream(propsFile); + props.load(in); + in.close(); + } + catch (Exception ex) + { + // System configuration not present, ignore. + } + } + + // Fetch the screen_magnifier_present property. Check systen properties + // first, then fallback to the configuration file. + String magPresent = SystemProperties.getProperty + ("javax.accessibility.screen_magnifier_present"); + if (magPresent == null) + { + magPresent = props.getProperty("screen_magnifier_present"); + if (magPresent != null) + { + SystemProperties.setProperty + ("javax.accessibility.screen_magnifier_present", magPresent); + } + } + + // Fetch the screen_reader_present property. Check systen properties + // first, then fallback to the configuration file. + String readerPresent = SystemProperties.getProperty + ("javax.accessibility.screen_reader_present"); + if (readerPresent == null) + { + readerPresent = props.getProperty("screen_reader_present"); + if (readerPresent != null) + { + SystemProperties.setProperty + ("javax.accessibility.screen_reader_present", readerPresent); + } + } + + // Fetch the list of classes to be loaded. + String classes = SystemProperties.getProperty + ("javax.accessibility.assistive_technologies"); + if (classes == null) + { + classes = props.getProperty("assistive_technologies"); + if (classes != null) + { + SystemProperties.setProperty + ("javax.accessibility.assistive_technologies", classes); + } + } + + // Try to load the assisitive_technologies classes. + if (classes != null) + { + ClassLoader cl = ClassLoader.getSystemClassLoader(); + StringTokenizer tokenizer = new StringTokenizer(classes, ","); + while (tokenizer.hasMoreTokens()) + { + String className = tokenizer.nextToken(); + try + { + Class atClass = cl.loadClass(className); + atClass.newInstance(); + } + catch (ClassNotFoundException ex) + { + AWTError err = new AWTError("Assistive Technology class not" + + " found: " + className); + err.initCause(ex); + throw err; + } + catch (InstantiationException ex) + { + AWTError err = + new AWTError("Assistive Technology class cannot be " + + "instantiated: " + className); + err.initCause(ex); + throw err; + } + catch (IllegalAccessException ex) + { + AWTError err = + new AWTError("Assistive Technology class cannot be " + + "accessed: " + className); + err.initCause(err); + throw err; + } + } + } + return null; + } + }); + + } + } // class Toolkit |