rcp的文本编辑器的实例

package bear; import java.io.BufferedReader; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStreamReader; import java.io.OutputStreamWriter; import java.io.UnsupportedEncodingException; import java.io.OutputStream; import org.eclipse.core.runtime.IProgressMonitor; import org.eclipse.jface.dialogs.MessageDialog; import org.eclipse.swt.SWT; import org.eclipse.swt.events.ModifyEvent; import org.eclipse.swt.events.ModifyListener; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.FileDialog; import org.eclipse.swt.widgets.Text; import org.eclipse.ui.IEditorInput; import org.eclipse.ui.IEditorSite; import org.eclipse.ui.ISaveablePart2; import org.eclipse.ui.PartInitException; import org.eclipse.ui.part.EditorPart; public class MyEditor extends EditorPart implements ISaveablePart2 { public static final String ID="myeditor"; private Text text; private boolean dirty; private MyInput input; public MyEditor() { // TODO Auto-generated constructor stub } @Override public void doSave(IProgressMonitor monitor) { SaveToLocal(input.getName()); dirty=false; firePropertyChange(ISaveablePart2.PROP_DIRTY); } @Override public void doSaveAs() { FileDialog dialog=new FileDialog(getEditorSite().getShell(),SWT.SAVE); String path=dialog.open(); if(path!=null){ SaveToLocal(path); } } @Override public void init(IEditorSite site, IEditorInput input) throws PartInitException { setSite(site); setInput(input); setPartName(input.getName()); this.input=(MyInput)input; } @Override public boolean isDirty() { // TODO Auto-generated method stub return dirty; } @Override public boolean isSaveAsAllowed() { // TODO Auto-generated method stub return true; } @Override public void createPartControl(Composite parent) { text =new Text(parent,SWT.BORDER|SWT.WRAP|SWT.H_SCROLL|SWT.CANCEL|SWT.MULTI); loadText(); text.addModifyListener(new ModifyListener(){ @Override public void modifyText(ModifyEvent e) { // TODO Auto-generated method stub dirty=true; firePropertyChange(ISaveablePart2.PROP_DIRTY); } }); } @Override public void setFocus() { text.setFocus(); } @Override public int promptToSaveOnClose() { if(dirty){ if(MessageDialog.openConfirm(getEditorSite().getShell(), "提示", "没保存，继续？")){ return ISaveablePart2.NO; }else{ return ISaveablePart2.CANCEL; } } return YES; } private void loadText(){ try{ BufferedReader reader=new BufferedReader(new InputStreamReader(new FileInputStream(input.getName()),"utf-8")); StringBuffer sb=new StringBuffer(); String line=reader.readLine(); while(line!=null){ sb.append(line); sb.append("\n"); line=reader.readLine(); } reader.close(); text.setText(sb.toString()); }catch(FileNotFoundException e){ e.printStackTrace(); }catch (UnsupportedEncodingException e) { e.printStackTrace(); }catch(IOException e){ e.printStackTrace(); } } private void SaveToLocal(String path){ try{ OutputStream out=new FileOutputStream(path); OutputStreamWriter writer =new OutputStreamWriter(out,"utf-8"); writer.write(text.getText()); writer.close(); out.close(); }catch(FileNotFoundException e){ e.printStackTrace(); }catch (UnsupportedEncodingException e) { e.printStackTrace(); }catch(IOException e){ e.printStackTrace(); } } }