pluginjar.java

开源的java 编辑器源代码

			else if(lname.equals("services.xml"))
			{
				servicesURI = classLoader.getResource(name);
				cache.servicesURI = servicesURI;
			}
			else if(lname.endsWith(".props"))
			{
				InputStream in = classLoader.getResourceAsStream(name);
				properties.load(in);
				in.close();
			}
			else if(name.endsWith(".class"))
			{
				String className = MiscUtilities
					.fileToClass(name);
				if(className.endsWith("Plugin"))
				{
					plugins.add(className);
				}
				classes.add(className);
			}
		}

		cache.cachedProperties = properties;
		jEdit.addPluginProps(properties);

		this.classes = cache.classes =
			(String[])classes.toArray(
			new String[classes.size()]);

		String label = null;

		Iterator iter = plugins.iterator();
		while(iter.hasNext())
		{
			String className = (String)iter.next();

			String _label = jEdit.getProperty("plugin."
				+ className + ".name");
			String version = jEdit.getProperty("plugin."
				+ className + ".version");
			if(_label == null || version == null)
			{
				Log.log(Log.WARNING,this,"Ignoring: "
					+ className);
			}
			else
			{
				cache.pluginClass = className;

				// Check if a plugin with the same name
				// is already loaded
				if(jEdit.getPlugin(className) != null)
				{
					jEdit.pluginError(path,
						"plugin-error.already-loaded",
						null);
					return null;
				}
				else
				{
					plugin = new EditPlugin.Deferred(
						className);
					plugin.jar = (EditPlugin.JAR)this;
					label = _label;
				}

				break;
			}
		}

		if(cache.actionsURI != null)
		{
			actions = new ActionSet(this,null,null,
				cache.actionsURI);
			actions.load();
			cache.cachedActionNames =
				actions.getCacheableActionNames();
			cache.cachedActionToggleFlags = new boolean[
				cache.cachedActionNames.length];
			for(int i = 0; i < cache.cachedActionNames.length; i++)
			{
				 cache.cachedActionToggleFlags[i]
				 	= jEdit.getBooleanProperty(
					cache.cachedActionNames[i]
					+ ".toggle");
			}
		}

		if(cache.browserActionsURI != null)
		{
			browserActions = new ActionSet(this,null,null,
				cache.browserActionsURI);
			browserActions.load();
			VFSBrowser.getActionContext().addActionSet(browserActions);
			cache.cachedBrowserActionNames =
				browserActions.getCacheableActionNames();
			cache.cachedBrowserActionToggleFlags = new boolean[
				cache.cachedBrowserActionNames.length];
			for(int i = 0;
				i < cache.cachedBrowserActionNames.length;
				i++)
			{
				 cache.cachedBrowserActionToggleFlags[i]
				 	= jEdit.getBooleanProperty(
					cache.cachedBrowserActionNames[i]
					+ ".toggle");
			}
		}

		if(dockablesURI != null)
		{
			DockableWindowManager.loadDockableWindows(this,
				dockablesURI,cache);
		}

		if(actions.size() != 0)
		{
			if(label != null)
			{
				actions.setLabel(jEdit.getProperty(
					"action-set.plugin",
					new String[] { label }));
			}
			else
				actionsPresentButNotCoreClass();

			jEdit.addActionSet(actions);
		}

		if(servicesURI != null)
		{
			ServiceManager.loadServices(this,servicesURI,cache);
		}

		return cache;
	} //}}}

	//{{{ startPlugin() method
	private void startPlugin()
	{
		try
		{
			plugin.start();
		}
		catch(Throwable t)
		{
			breakPlugin();

			Log.log(Log.ERROR,PluginJAR.this,
				"Error while starting plugin " + plugin.getClassName());
			Log.log(Log.ERROR,PluginJAR.this,t);
			String[] args = { t.toString() };
			jEdit.pluginError(path,"plugin-error.start-error",args);
		}

		if(plugin instanceof EBPlugin)
		{
			if(jEdit.getProperty("plugin."
				+ plugin.getClassName() + ".activate")
				== null)
			{
				// old plugins expected jEdit 4.1-style
				// behavior, where a PropertiesChanged
				// was sent after plugins were started
				((EBComponent)plugin).handleMessage(
					new org.gjt.sp.jedit.msg.PropertiesChanged(null));
			}
			EditBus.addToBus((EBPlugin)plugin);
		}

		// buffers retain a reference to the fold handler in
		// question... and the easiest way to handle fold
		// handler loading is this...
		Buffer buffer = jEdit.getFirstBuffer();
		while(buffer != null)
		{
			FoldHandler handler =
				FoldHandler.getFoldHandler(
				buffer.getStringProperty("folding"));
			// == null before loaded
			if(buffer.getFoldHandler() != null
				&& handler != null
				&& handler != buffer.getFoldHandler())
			{
				buffer.setFoldHandler(handler);
			}
			buffer = buffer.getNext();
		}
	} //}}}

	//{{{ startPluginLater() method
	private void startPluginLater()
	{
		SwingUtilities.invokeLater(new Runnable()
		{
			public void run()
			{
				if(!activated)
					return;

				startPlugin();
			}
		});
	} //}}}

	//{{{ breakPlugin() method
	private void breakPlugin()
	{
		plugin = new EditPlugin.Broken(plugin.getClassName());
		plugin.jar = (EditPlugin.JAR)this;

		// remove action sets, dockables, etc so that user doesn't
		// see the broken plugin
		uninit(false);
		// but we want properties to hang around
		jEdit.addPluginProps(properties);
	} //}}}

	//}}}

	//{{{ PluginCacheEntry class
	/**
	 * Used by the <code>DockableWindowManager</code> and
	 * <code>ServiceManager</code> to handle caching.
	 * @since jEdit 4.2pre1
	 */
	public static class PluginCacheEntry
	{
		public static final int MAGIC = 0xB7A2E420;

		//{{{ Instance variables
		public PluginJAR plugin;
		public long modTime;

		public String[] classes;
		public URL actionsURI;
		public String[] cachedActionNames;
		public boolean[] cachedActionToggleFlags;
		public URL browserActionsURI;
		public String[] cachedBrowserActionNames;
		public boolean[] cachedBrowserActionToggleFlags;
		public URL dockablesURI;
		public String[] cachedDockableNames;
		public boolean[] cachedDockableActionFlags;
		public URL servicesURI;
		public ServiceManager.Descriptor[] cachedServices;

		public Properties cachedProperties;
		public String pluginClass;
		//}}}

		/* read() and write() must be kept perfectly in sync...
		 * its a very simple file format. doing it this way is
		 * faster than serializing since serialization calls
		 * reflection, etc. */

		//{{{ read() method
		public boolean read(DataInputStream din) throws IOException
		{
			int cacheMagic = din.readInt();
			if(cacheMagic != MAGIC)
				return false;

			String cacheBuild = readString(din);
			if(!cacheBuild.equals(jEdit.getBuild()))
				return false;

			long cacheModTime = din.readLong();
			if(cacheModTime != modTime)
				return false;

			actionsURI = readURI(din);
			cachedActionNames = readStringArray(din);
			cachedActionToggleFlags = readBooleanArray(din);

			browserActionsURI = readURI(din);
			cachedBrowserActionNames = readStringArray(din);
			cachedBrowserActionToggleFlags = readBooleanArray(din);

			dockablesURI = readURI(din);
			cachedDockableNames = readStringArray(din);
			cachedDockableActionFlags = readBooleanArray(din);

			servicesURI = readURI(din);
			int len = din.readInt();
			if(len == 0)
				cachedServices = null;
			else
			{
				cachedServices = new ServiceManager.Descriptor[len];
				for(int i = 0; i < len; i++)
				{
					ServiceManager.Descriptor d = new
						ServiceManager.Descriptor(
						readString(din),
						readString(din),
						null,
						plugin);
					cachedServices[i] = d;
				}
			}

			classes = readStringArray(din);

			cachedProperties = readMap(din);

			pluginClass = readString(din);

			return true;
		} //}}}

		//{{{ write() method
		public void write(DataOutputStream dout) throws IOException
		{
			dout.writeInt(MAGIC);
			writeString(dout,jEdit.getBuild());

			dout.writeLong(modTime);

			writeString(dout,actionsURI);
			writeStringArray(dout,cachedActionNames);
			writeBooleanArray(dout,cachedActionToggleFlags);

			writeString(dout,browserActionsURI);
			writeStringArray(dout,cachedBrowserActionNames);
			writeBooleanArray(dout,cachedBrowserActionToggleFlags);

			writeString(dout,dockablesURI);
			writeStringArray(dout,cachedDockableNames);
			writeBooleanArray(dout,cachedDockableActionFlags);

			writeString(dout,servicesURI);
			if(cachedServices == null)
				dout.writeInt(0);
			else
			{
				dout.writeInt(cachedServices.length);
				for(int i = 0; i < cachedServices.length; i++)
				{
					writeString(dout,cachedServices[i].clazz);
					writeString(dout,cachedServices[i].name);
				}
			}

			writeStringArray(dout,classes);

			writeMap(dout,cachedProperties);

			writeString(dout,pluginClass);
		} //}}}

		//{{{ Private members

		//{{{ readString() method
		private String readString(DataInputStream din)
			throws IOException
		{
			int len = din.readInt();
			if(len == 0)
				return null;
			char[] str = new char[len];
			for(int i = 0; i < len; i++)
				str[i] = din.readChar();
			return new String(str);
		} //}}}

		//{{{ readURI() method
		private URL readURI(DataInputStream din)
			throws IOException
		{
			String str = readString(din);
			if(str == null)
				return null;
			else
				return new URL(str);
		} //}}}

		//{{{ readStringArray() method
		private String[] readStringArray(DataInputStream din)
			throws IOException
		{
			int len = din.readInt();
			if(len == 0)
				return null;
			String[] str = new String[len];
			for(int i = 0; i < len; i++)
			{
				str[i] = readString(din);
			}
			return str;
		} //}}}

		//{{{ readBooleanArray() method
		private boolean[] readBooleanArray(DataInputStream din)
			throws IOException
		{
			int len = din.readInt();
			if(len == 0)
				return null;
			boolean[] bools = new boolean[len];
			for(int i = 0; i < len; i++)
			{
				bools[i] = din.readBoolean();
			}
			return bools;
		} //}}}

		//{{{ readMap() method
		private Properties readMap(DataInputStream din)
			throws IOException
		{
			Properties returnValue = new Properties();
			int count = din.readInt();
			for(int i = 0; i < count; i++)
			{
				String key = readString(din);
				String value = readString(din);
				if(value == null)
					value = "";
				returnValue.put(key,value);
			}
			return returnValue;
		} //}}}

		//{{{ writeString() method
		private void writeString(DataOutputStream dout,
			Object obj) throws IOException
		{
			if(obj == null)
			{
				dout.writeInt(0);
			}
			else
			{
				String str = obj.toString();
				dout.writeInt(str.length());
				dout.writeChars(str);
			}
		} //}}}

		//{{{ writeStringArray() method
		private void writeStringArray(DataOutputStream dout,
			String[] str) throws IOException
		{
			if(str == null)
			{
				dout.writeInt(0);
			}
			else
			{
				dout.writeInt(str.length);
				for(int i = 0; i < str.length; i++)
				{
					writeString(dout,str[i]);
				}
			}
		} //}}}

		//{{{ writeBooleanArray() method
		private void writeBooleanArray(DataOutputStream dout,
			boolean[] bools) throws IOException
		{
			if(bools == null)
			{
				dout.writeInt(0);
			}
			else
			{
				dout.writeInt(bools.length);
				for(int i = 0; i < bools.length; i++)
				{
					dout.writeBoolean(bools[i]);
				}
			}
		} //}}}

		//{{{ writeMap() method
		private void writeMap(DataOutputStream dout, Map map)
			throws IOException
		{
			dout.writeInt(map.size());
			Iterator iter = map.keySet().iterator();
			while(iter.hasNext())
			{
				String key = (String)iter.next();
				writeString(dout,key);
				writeString(dout,map.get(key));
			}
		} //}}}

		//}}}
	} //}}}
}