minieditor.java

这是一个很厉害的JAVA程序

		} 
//		else if(ae.getSource() == menuFilePrintSetup) { 
//		ta.printItSetup(ta.getText(), ta.getFont()); 
//		todo... 
//		} 
		else if(ae.getSource() == menuFileSave) { 
			OutputStreamWriter osw; 
			if(fns != null) { 
				try{ 
					osw = new OutputStreamWriter( 
							new BufferedOutputStream( 
									new FileOutputStream(fns))); 
					osw.write(ta.getText(), 0, ta.getText().length()); 
					osw.close(); 
					fileStatus.setText("file saved"); 
				} catch(IOException e) { 
				} 
				if(fileStatus.getText().endsWith("*")) { 
					fileStatus.setText(fileStatus.getText().substring(0, 
							fileStatus.getText().length() - 1)); 
				} 
			} 
			else { 
				Frame saveFileFrame = new Frame("Save file"); 
				FileDialog fileDialog = new FileDialog(saveFileFrame); 
				fileDialog.setMode(FileDialog.SAVE); 
				fileDialog.setFile("*.txt;*.java"); 
				fileDialog.show(); 
				String file = fileDialog.getFile(); 
				String directory = fileDialog.getDirectory(); 
				if(file != null) { 
					fns = directory + file; 
					try{ 
						osw = new OutputStreamWriter( 
								new BufferedOutputStream( 
										new FileOutputStream(fns))); 
						osw.write(ta.getText(), 0, ta.getText().length()); 
						osw.close(); 
						fileStatus.setText("file saved"); 
					} catch(IOException e) { 
					} 
				} 
			} 
		} 
		else if(ae.getSource() == menuFileSaveAs) { 
			OutputStreamWriter osw; 
			Frame saveFileFrame = new Frame("Save file"); 
			FileDialog fileDialog = new FileDialog(saveFileFrame); 
			fileDialog.setMode(FileDialog.SAVE); 
			fileDialog.setFile("*.txt;*.java"); 
			fileDialog.show(); 
			String file = fileDialog.getFile(); 
			String directory = fileDialog.getDirectory(); 
			if(file != null) { 
				fns = directory + file; 
				try{ 
					osw = new OutputStreamWriter( 
							new BufferedOutputStream( 
									new FileOutputStream(fns))); 
					osw.write(ta.getText(), 0, ta.getText().length()); 
					osw.close(); 
					fileStatus.setText("file saved"); 
				} catch(IOException e) { 
				} 
			} 
		} 
		else if(ae.getSource() == menuFileExit) { 
			System.exit(0); 
		} 
		else if(ae.getSource() == menuEditUndo) { 
			if(undo.canUndo()) { 
				try { 
					undo.undo(); 
				} catch(CannotUndoException ex) { 
					System.out.println("Unable to undo: " + ex); 
					ex.printStackTrace(); 
				} 
				if(!undo.canUndo()) 
					menuEditUndo.setEnabled(false); 
			} 
//			else 
//			menuEditUndo.setEnabled(false); 
		} 
		else if(ae.getSource() == menuEditRedo) { 
//			todo... 
		} 
		else if(ae.getSource() == menuEditCut) { 
			ta.cut(); 
		} 
		else if(ae.getSource() == menuEditCopy) { 
			ta.copy(); 
		} 
		else if(ae.getSource() == menuEditPaste) { 
			ta.paste(); 
		} 
		else if(ae.getSource() == menuEditDeleteSelection) { 
			ta.replaceRange("", ta.getSelectionStart(), ta.getSelectionEnd()); 
		} 
		else if(ae.getSource() == menuEditDeleteLine) { 
			String str = ta.getText(); 
			int pos = ta.getCaretPosition(); 
			int lineStart = 0, lineEnd = 0; 
			lineStart = str.substring(0, pos).lastIndexOf('\12'); 
			lineEnd = str.indexOf('\15', pos); 
			lineStart = (lineStart == -1) ? 0 : (lineStart - 1); 
			ta.replaceRange("", lineStart, lineEnd); 
			lineStart = (lineStart == 0) ? 0 : (lineStart + 2); 
			ta.setCaretPosition(lineStart); 
		} 
		else if(ae.getSource() == menuEditDeleteWord) { 
			String str = ta.getText(); 
			int pos = ta.getCaretPosition(); 
			int wordStart = 0, wordEnd = 0; 
			wordEnd = wordLocation(str, pos, true); 
			if(wordEnd == pos) { 
				wordStart = pos; 
				wordEnd = pos + 1; 
				ta.replaceRange("", wordStart, wordEnd); 
			} 
			else { 
				wordStart = wordLocation(str, pos, false); 
				if(wordStart == -1) 
					ta.replaceRange("", 0, wordEnd); 
				else 
					ta.replaceRange("", wordStart, wordEnd); 
			} 
		} 
		else if(ae.getSource() == menuEditFind) { 
			JDialog ds = new JDialog(this, "Find", true); 
			ds.getContentPane().setLayout(new FlowLayout()); 
			ds.setResizable(false); 
			tfs = new TextField(15); 
			ds.getContentPane().add(tfs); 
			bs = new Button("Find"); 
			bs.addActionListener(this); 
			Button bsc = new Button("Cancel"); 
			bsc.addActionListener(new ActionListener() { 
				public void actionPerformed(ActionEvent bOke) { 
					dispose(); 
					foundCount = 0; 
				} 
			}); 
			ds.getContentPane().add(bs); 
			ds.getContentPane().add(bsc); 
			JLabel dsMessage1 = new JLabel("Found counts: "); 
			dsMessage2 = new JLabel(" 0"); 
			dsLoop = new Checkbox("Loop"); 
			dsLoop.setState(findingLoop); 
			dsMatchCase = new Checkbox("Match Case"); 
			ds.getContentPane().add(dsLoop); 
			ds.getContentPane().add(dsMatchCase); 
			ds.getContentPane().add(dsMessage1); 
			ds.getContentPane().add(dsMessage2); 
			ds.setLocation(120, 120); 
			ds.addWindowListener(new WindowAdapter() { 
				public void windowClosing(WindowEvent e) { 
					dispose(); 
					FindStartPos = 0; 
				} 
			}); 
			ds.setSize(250,110); 
			ds.setVisible(true); 
		} 
		else if(ae.getSource() == bs) { 
			int a = 0, b = 0; 
			String str1, str2, str3, str4, strA, strB; 
			str1 = ta.getText(); 
			str2 = str1.toLowerCase(); 
			str3 = tfs.getText(); 
			str4 = str3.toLowerCase(); 
			if(dsMatchCase.getState()) { 
				strA = str1; 
				strB = str3; 
			} 
			else { 
				strA = str2; 
				strB = str4; 
			} 
			a = strA.indexOf(strB, FindStartPos); 
			if(a > -1) { 
				ta.setCaretPosition(a); 
				b = tfs.getText().length(); 
				ta.select(a, a + b); 
				FindStartPos = a + b; 
				foundCount++; 
				dsMessage2.setText(foundCount+""); 
			} 
			else { 
				if(dsLoop.getState()) { 
					JOptionPane.showMessageDialog(null, "End of file.", "Find result",1); 
					FindStartPos = 0; 
				} 
				else { 
					JOptionPane.showMessageDialog(null, "End of file.", "Find result",1); 
				} 
				foundCount = 0; 
			} 
		} 
		else if(ae.getSource() == menuEditReplace) { 
			JDialog dr = new JDialog(this, "Replace", true); 
			dr.getContentPane().setLayout(new GridBagLayout()); 
			GridBagConstraints gbc = new GridBagConstraints(); 
			gbc.gridx = 0; 
			gbc.gridy = 0; 
			gbc.gridwidth = 2; 
			gbc.gridheight =1; 
//			gbc.fill = gbc.HORIZONTAL; gbc.anchor = gbc.CENTER; 
			Panel p1 = new Panel(); 
			dr.getContentPane().add(p1); 
//			drMatchCase = new Checkbox("Match Case"); 
//			gbc.gridx = 1; 
//			gbc.gridy = 1; 
//			gbc.gridwidth = 1; 
//			gbc.gridheight =1; 
//			dr.getContentPane().add(drMatchCase); 
			gbc.gridx = 2; 
			gbc.gridy = 0; 
			gbc.gridwidth = 1; 
			gbc.gridheight =1; 
//			gbc.fill = gbc.NONE; gbc.anchor = gbc.EAST; 
			Panel p2 = new Panel(); 
			p1.setLayout(new GridLayout(5, 1)); 
			p2.setLayout(new GridLayout(4, 1)); 
			dr.getContentPane().add(p2); 
			JLabel drMessage1 = new JLabel("Replace: "); 
			JLabel drMessage2 = new JLabel("With: "); 
			drMatchCase = new Checkbox("Match Case"); 
			tfro = new TextField(15); 
			tfrn = new TextField(15); 
			p1.add(drMessage1); 
			p1.add(tfro); 
			p1.add(drMessage2); 
			p1.add(tfrn); 
			p1.add(drMatchCase); 
			brf = new Button("Find"); 
//			brf.addActionListener(this); 
			brf.addActionListener(new ActionListener() { 
				public void actionPerformed(ActionEvent brfe) { 
					int a = 0, b = 0; 
					String str1, str2, str3, str4, strA, strB; 
					str1 = ta.getText(); 
					str2 = str1.toLowerCase(); 
					str3 = tfro.getText(); 
					str4 = str3.toLowerCase(); 
					if(drMatchCase.getState()) { 
						strA = str1; 
						strB = str3; 
					} 
					else { 
						strA = str2; 
						strB = str4; 
					} 
					a = strA.indexOf(strB, FindStartPos); 
					if(a > -1) { 
						ta.setCaretPosition(a); 
						b = tfro.getText().length(); 
						ta.select(a, a + b); 
						FindStartPos = a + b; 
						foundCount++; 
					} 
					else { 
						JOptionPane.showMessageDialog(null, "End of file.", "Result",1); 
						foundCount = 0; 
					} 
				} 
			}); 
			brr = new Button("Replace"); 
			brr.addActionListener(new ActionListener() { 
				public void actionPerformed(ActionEvent brre) { 
					if(tfrn.getText().length() == 0 && ta.getSelectedText() != null) 
						ta.replaceSelection(""); 
					if(tfrn.getText().length() > 0 && ta.getSelectedText() != null) 
						ta.replaceSelection(tfrn.getText()); 
					int a = 0, b = 0; 
					String str1, str2, str3, str4, strA, strB; 
					str1 = ta.getText(); 
					str2 = str1.toLowerCase(); 
					str3 = tfro.getText(); 
					str4 = str3.toLowerCase(); 
					if(drMatchCase.getState()) { 
						strA = str1; 
						strB = str3; 
					} 
					else { 
						strA = str2; 
						strB = str4; 
					} 
					a = strA.indexOf(strB, FindStartPos); 
					if(a > -1) { 
						ta.setCaretPosition(a); 
						b = tfro.getText().length(); 
						ta.select(a, a + b); 
						FindStartPos = a + b; 
						foundCount++; 
					} 
					else { 
						JOptionPane.showMessageDialog(null, "End of file.", "Result",1); 
						foundCount = 0; 
					} 
				} 
			}); 
			brra = new Button("Replace All"); 
			brra.addActionListener(new ActionListener() { 
				public void actionPerformed(ActionEvent brrae) { 
					int a = 0; 
					while( a > -1) { 
						int b = 0; 
						String str1, str2, str3, str4, strA, strB; 
						str1 = ta.getText(); 
						str2 = str1.toLowerCase(); 
						str3 = tfro.getText(); 
						str4 = str3.toLowerCase(); 
						if(drMatchCase.getState()) { 
							strA = str1; 
							strB = str3; 
						} 
						else { 
							strA = str2; 
							strB = str4; 
						} 
						a = strA.indexOf(strB, FindStartPos); 
						if(a > -1) { 
							ta.setCaretPosition(a); 
							b = tfro.getText().length();