editpane.java

用java 编写的源码开放的文本编辑器。有很多有用的特性

	//{{{ getMinimumSize() method
	/**
	 * Returns 0,0 for split pane compatibility.
	 */
	public final Dimension getMinimumSize()
	{
		return new Dimension(0,0);
	} //}}}

	//{{{ Package-private members

	//{{{ EditPane constructor
	EditPane(View view, Buffer buffer)
	{
		super(new BorderLayout());

		init = true;

		this.view = view;

		EditBus.addToBus(this);

		textArea = new JEditTextArea(view);

		add(BorderLayout.CENTER,textArea);

		propertiesChanged();

		if(buffer == null)
			setBuffer(jEdit.getFirstBuffer());
		else
			setBuffer(buffer);

		loadBufferSwitcher();

		init = false;
	} //}}}

	//{{{ close() method
	void close()
	{
		saveCaretInfo();
		EditBus.send(new EditPaneUpdate(this,EditPaneUpdate.DESTROYED));
		EditBus.removeFromBus(this);
	} //}}}

	//}}}

	//{{{ Private members

	//{{{ Instance variables
	private boolean init;
	private View view;
	private Buffer buffer;
	private Buffer recentBuffer;
	private BufferSwitcher bufferSwitcher;
	private JEditTextArea textArea;
	//}}}

	//{{{ propertiesChanged() method
	private void propertiesChanged()
	{
		TextAreaPainter painter = textArea.getPainter();

		painter.setFont(UIManager.getFont("TextArea.font"));
		painter.setBracketHighlightEnabled(jEdit.getBooleanProperty(
			"view.bracketHighlight"));
		painter.setBracketHighlightColor(
			jEdit.getColorProperty("view.bracketHighlightColor"));
		painter.setEOLMarkersPainted(jEdit.getBooleanProperty(
			"view.eolMarkers"));
		painter.setEOLMarkerColor(
			jEdit.getColorProperty("view.eolMarkerColor"));
		painter.setWrapGuidePainted(jEdit.getBooleanProperty(
			"view.wrapGuide"));
		painter.setWrapGuideColor(
			jEdit.getColorProperty("view.wrapGuideColor"));
		painter.setCaretColor(
			jEdit.getColorProperty("view.caretColor"));
		painter.setSelectionColor(
			jEdit.getColorProperty("view.selectionColor"));
		painter.setBackground(
			jEdit.getColorProperty("view.bgColor"));
		painter.setForeground(
			jEdit.getColorProperty("view.fgColor"));
		painter.setBlockCaretEnabled(jEdit.getBooleanProperty(
			"view.blockCaret"));
		painter.setLineHighlightEnabled(jEdit.getBooleanProperty(
			"view.lineHighlight"));
		painter.setLineHighlightColor(
			jEdit.getColorProperty("view.lineHighlightColor"));
		painter.setAntiAliasEnabled(jEdit.getBooleanProperty(
			"view.antiAlias"));
		painter.setFractionalFontMetricsEnabled(jEdit.getBooleanProperty(
			"view.fracFontMetrics"));
		painter.setStyles(GUIUtilities.loadStyles(
			jEdit.getProperty("view.font"),
			jEdit.getIntegerProperty("view.fontsize",12)));

		painter.setFoldLineStyle(GUIUtilities.parseStyle(
			jEdit.getProperty("view.style.foldLine"),
			jEdit.getProperty("view.font"),
			jEdit.getIntegerProperty("view.fontsize",12)));
		Gutter gutter = textArea.getGutter();
		gutter.setExpanded(jEdit.getBooleanProperty(
			"view.gutter.lineNumbers"));
		int interval = jEdit.getIntegerProperty(
			"view.gutter.highlightInterval",5);
		gutter.setHighlightInterval(interval);
		gutter.setCurrentLineHighlightEnabled(jEdit.getBooleanProperty(
			"view.gutter.highlightCurrentLine"));
		gutter.setBracketHighlightEnabled(jEdit.getBooleanProperty(
			"view.gutter.bracketHighlight"));
		gutter.setBracketHighlightColor(
			jEdit.getColorProperty("view.gutter.bracketHighlightColor"));
		gutter.setBackground(
			jEdit.getColorProperty("view.gutter.bgColor"));
		gutter.setForeground(
			jEdit.getColorProperty("view.gutter.fgColor"));
		gutter.setHighlightedForeground(
			jEdit.getColorProperty("view.gutter.highlightColor"));
		gutter.setFoldColor(
			jEdit.getColorProperty("view.gutter.foldColor"));
		gutter.setMarkerHighlightColor(
			jEdit.getColorProperty("view.gutter.markerColor"));
		gutter.setMarkerHighlightEnabled(jEdit.getBooleanProperty(
			"view.gutter.markerHighlight"));
		gutter.setCurrentLineForeground(
			jEdit.getColorProperty("view.gutter.currentLineColor"));
		String alignment = jEdit.getProperty(
			"view.gutter.numberAlignment");
		if ("right".equals(alignment))
		{
			gutter.setLineNumberAlignment(Gutter.RIGHT);
		}
		else if ("center".equals(alignment))
		{
			gutter.setLineNumberAlignment(Gutter.CENTER);
		}
		else // left == default case
		{
			gutter.setLineNumberAlignment(Gutter.LEFT);
		}

		gutter.setFont(jEdit.getFontProperty("view.gutter.font"));

		int width = jEdit.getIntegerProperty(
			"view.gutter.borderWidth",3);
		gutter.setBorder(width,
			jEdit.getColorProperty("view.gutter.focusBorderColor"),
			jEdit.getColorProperty("view.gutter.noFocusBorderColor"),
			textArea.getPainter().getBackground());

		textArea.setCaretBlinkEnabled(jEdit.getBooleanProperty(
			"view.caretBlink"));

		textArea.setElectricScroll(jEdit.getIntegerProperty(
			"view.electricBorders",0));

		// Set up the right-click popup menu
		JPopupMenu popup = GUIUtilities.loadPopupMenu("view.context");
		JMenuItem customize = new JMenuItem(jEdit.getProperty(
			"view.context.customize"));
		customize.addActionListener(new ActionListener()
		{
			public void actionPerformed(ActionEvent evt)
			{
				new GlobalOptions(view,"context");
			}
		});
		popup.addSeparator();
		popup.add(customize);
		textArea.setRightClickPopup(popup);

		// use old property name for backwards compatibility
		textArea.setQuickCopyEnabled(jEdit.getBooleanProperty(
			"view.middleMousePaste"));

		textArea.propertiesChanged();
	} //}}}

	//{{{ loadBufferSwitcher() method
	private void loadBufferSwitcher()
	{
		if(jEdit.getBooleanProperty("view.showBufferSwitcher"))
		{
			if(bufferSwitcher == null)
			{
				bufferSwitcher = new BufferSwitcher(this);
				add(BorderLayout.NORTH,bufferSwitcher);
				bufferSwitcher.updateBufferList();
				revalidate();
			}
		}
		else if(bufferSwitcher != null)
		{
			remove(bufferSwitcher);
			revalidate();
			bufferSwitcher = null;
		}
	} //}}}

	//{{{ handleBufferUpdate() method
	private void handleBufferUpdate(BufferUpdate msg)
	{
		Buffer _buffer = msg.getBuffer();
		if(msg.getWhat() == BufferUpdate.CREATED)
		{
			if(bufferSwitcher != null)
				bufferSwitcher.updateBufferList();

			/* When closing the last buffer, the BufferUpdate.CLOSED
			 * handler doesn't call setBuffer(), because null buffers
			 * are not supported. Instead, it waits for the subsequent
			 * 'Untitled' file creation. */
			if(buffer.isClosed())
			{
				setBuffer(jEdit.getFirstBuffer());
				// since recentBuffer will be set to the one that
				// was closed
				recentBuffer = null;
			}
		}
		else if(msg.getWhat() == BufferUpdate.CLOSED)
		{
			if(bufferSwitcher != null)
				bufferSwitcher.updateBufferList();

			if(_buffer == buffer)
			{
				Buffer newBuffer = (recentBuffer != null ?
					recentBuffer : _buffer.getPrev());
				if(newBuffer != null && !newBuffer.isClosed())
					setBuffer(newBuffer);
				else if(jEdit.getBufferCount() != 0)
					setBuffer(jEdit.getFirstBuffer());

				recentBuffer = null;
			}
			else if(_buffer == recentBuffer)
				recentBuffer = null;
		}
		else if(msg.getWhat() == BufferUpdate.LOAD_STARTED)
		{
			if(_buffer == buffer)
			{
				textArea.setCaretPosition(0);
				textArea.getPainter().repaint();
			}
		}
		else if(msg.getWhat() == BufferUpdate.LOADED)
		{
			if(_buffer == buffer)
			{
				textArea.repaint();
				textArea.updateScrollBars();
				if(bufferSwitcher != null)
					bufferSwitcher.updateBufferList();

				if(view.getEditPane() == this)
				{
					StatusBar status = view.getStatus();
					status.updateCaretStatus();
					status.updateBufferStatus();
					status.updateMiscStatus();
				}

				loadCaretInfo();
			}

		}
		else if(msg.getWhat() == BufferUpdate.DIRTY_CHANGED)
		{
			if(_buffer == buffer)
			{
				if(bufferSwitcher != null)
				{
					if(buffer.isDirty())
						bufferSwitcher.repaint();
					else
						bufferSwitcher.updateBufferList();
				}
			}
		}
		else if(msg.getWhat() == BufferUpdate.MARKERS_CHANGED)
		{
			if(_buffer == buffer)
				textArea.getGutter().repaint();
		}
		else if(msg.getWhat() == BufferUpdate.PROPERTIES_CHANGED)
		{
			if(_buffer == buffer)
			{
				textArea.getFoldVisibilityManager()
					.foldStructureChanged();
				textArea.propertiesChanged();
				textArea.repaint();

				if(view.getEditPane() == this)
					view.getStatus().updateBufferStatus();
			}
		}
		else if(msg.getWhat() == BufferUpdate.SAVED)
		{
			if(_buffer == buffer)
				textArea.propertiesChanged();
		}
	} //}}}

	//}}}
}