Java tutorial
/* * Copyright (c) 2012, the Dart project authors. * * Licensed under the Eclipse Public License v1.0 (the "License"); you may not use this file except * in compliance with the License. You may obtain a copy of the License at * * http://www.eclipse.org/legal/epl-v10.html * * Unless required by applicable law or agreed to in writing, software distributed under the License * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express * or implied. See the License for the specific language governing permissions and limitations under * the License. */ package com.google.dart.tools.ui.internal.refactoring; import com.google.dart.tools.internal.corext.refactoring.code.ExtractMethodRefactoring; import com.google.dart.tools.internal.corext.refactoring.code.ParameterInfo; import com.google.dart.tools.internal.corext.refactoring.util.Messages; import com.google.dart.tools.ui.DartPluginImages; import com.google.dart.tools.ui.DartToolsPlugin; import com.google.dart.tools.ui.PreferenceConstants; import com.google.dart.tools.ui.internal.dialogs.TextFieldNavigationHandler; import com.google.dart.tools.ui.internal.text.DartHelpContextIds; import com.google.dart.tools.ui.internal.text.editor.DartSourceViewer; import com.google.dart.tools.ui.internal.util.RowLayouter; import com.google.dart.tools.ui.text.DartSourceViewerConfiguration; import org.eclipse.jface.dialogs.Dialog; import org.eclipse.jface.layout.PixelConverter; import org.eclipse.jface.preference.IPreferenceStore; import org.eclipse.jface.resource.JFaceResources; import org.eclipse.jface.text.Document; import org.eclipse.ltk.core.refactoring.RefactoringStatus; import org.eclipse.ltk.ui.refactoring.UserInputWizardPage; import org.eclipse.swt.SWT; import org.eclipse.swt.events.ModifyEvent; import org.eclipse.swt.events.ModifyListener; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Text; import org.eclipse.ui.PlatformUI; public class ExtractMethodInputPage extends UserInputWizardPage { public static final String PAGE_NAME = "ExtractMethodInputPage";//$NON-NLS-1$ private ExtractMethodRefactoring fRefactoring; private Text fTextField; private boolean fFirstTime; private DartSourceViewer fSignaturePreview; private Document fSignaturePreviewDocument; // private IDialogSettings fSettings; private static final String DESCRIPTION = RefactoringMessages.ExtractMethodInputPage_description; // private static final String GENERATE_JAVADOC = "GenerateJavadoc"; //$NON-NLS-1$ public ExtractMethodInputPage() { super(PAGE_NAME); setImageDescriptor(DartPluginImages.DESC_WIZBAN_REFACTOR_CU); setDescription(DESCRIPTION); fFirstTime = true; fSignaturePreviewDocument = new Document(); } @Override public void createControl(Composite parent) { fRefactoring = (ExtractMethodRefactoring) getRefactoring(); loadSettings(); Composite result = new Composite(parent, SWT.NONE); setControl(result); GridLayout layout = new GridLayout(); layout.numColumns = 2; result.setLayout(layout); RowLayouter layouter = new RowLayouter(2); GridData gd = null; initializeDialogUnits(result); Label label = new Label(result, SWT.NONE); label.setText(getLabelText()); fTextField = createTextInputField(result, SWT.BORDER); fTextField.setLayoutData(new GridData(GridData.FILL_HORIZONTAL)); layouter.perform(label, fTextField, 1); if (!fRefactoring.getParameters().isEmpty()) { ChangeParametersControl cp = new ChangeParametersControl(result, SWT.NONE, RefactoringMessages.ExtractMethodInputPage_parameters, new IParameterListChangeListener.Empty() { @Override public void parameterChanged(ParameterInfo parameter) { parameterModified(); } @Override public void parameterListChanged() { parameterModified(); } }, ChangeParametersControl.Mode.EXTRACT_METHOD); gd = new GridData(GridData.FILL_BOTH); gd.horizontalSpan = 2; cp.setLayoutData(gd); cp.setInput(fRefactoring.getParameters()); } // checkBox = new Button(result, SWT.CHECK); // checkBox.setText(RefactoringMessages.ExtractMethodInputPage_generateJavadocComment); // boolean generate = computeGenerateJavadoc(); // setGenerateJavadoc(generate); // checkBox.setSelection(generate); // checkBox.addSelectionListener(new SelectionAdapter() { // @Override // public void widgetSelected(SelectionEvent e) { // setGenerateJavadoc(((Button) e.widget).getSelection()); // } // }); // layouter.perform(checkBox); int duplicates = fRefactoring.getNumberOfDuplicates(); Button checkBox = new Button(result, SWT.CHECK); if (duplicates == 0) { checkBox.setText(RefactoringMessages.ExtractMethodInputPage_duplicates_none); } else if (duplicates == 1) { checkBox.setText(RefactoringMessages.ExtractMethodInputPage_duplicates_single); } else { checkBox.setText(Messages.format(RefactoringMessages.ExtractMethodInputPage_duplicates_multi, new Integer(duplicates))); } checkBox.setSelection(fRefactoring.getReplaceAllOccurrences()); checkBox.setEnabled(duplicates > 0); checkBox.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { fRefactoring.setReplaceAllOccurrences(((Button) e.widget).getSelection()); } }); layouter.perform(checkBox); label = new Label(result, SWT.SEPARATOR | SWT.HORIZONTAL); label.setLayoutData(new GridData(GridData.FILL_HORIZONTAL)); layouter.perform(label); createSignaturePreview(result, layouter); Dialog.applyDialogFont(result); PlatformUI.getWorkbench().getHelpSystem().setHelp(getControl(), DartHelpContextIds.EXTRACT_METHOD_WIZARD_PAGE); } @Override public void setVisible(boolean visible) { if (visible) { if (fFirstTime) { fFirstTime = false; setPageComplete(false); updatePreview(getText()); fTextField.setFocus(); } else { setPageComplete(validatePage(true)); } } super.setVisible(visible); } // private boolean computeGenerateJavadoc() { // boolean result = fRefactoring.getGenerateJavadoc(); // if (result) { // return result; // } // return fSettings.getBoolean(GENERATE_JAVADOC); // } private void createSignaturePreview(Composite composite, RowLayouter layouter) { Label previewLabel = new Label(composite, SWT.NONE); previewLabel.setText(RefactoringMessages.ExtractMethodInputPage_signature_preview); layouter.perform(previewLabel); IPreferenceStore store = DartToolsPlugin.getDefault().getCombinedPreferenceStore(); fSignaturePreview = new DartSourceViewer(composite, null, null, false, SWT.READ_ONLY | SWT.V_SCROLL | SWT.WRAP /*| SWT.BORDER*/, store); fSignaturePreview.configure(new DartSourceViewerConfiguration( DartToolsPlugin.getDefault().getDartTextTools().getColorManager(), store, null, null)); fSignaturePreview.getTextWidget().setFont(JFaceResources.getFont(PreferenceConstants.EDITOR_TEXT_FONT)); fSignaturePreview.adaptBackgroundColor(composite); fSignaturePreview.setDocument(fSignaturePreviewDocument); fSignaturePreview.setEditable(false); Control signaturePreviewControl = fSignaturePreview.getControl(); PixelConverter pixelConverter = new PixelConverter(signaturePreviewControl); GridData gdata = new GridData(GridData.FILL_BOTH); gdata.widthHint = pixelConverter.convertWidthInCharsToPixels(50); gdata.heightHint = pixelConverter.convertHeightInCharsToPixels(2); signaturePreviewControl.setLayoutData(gdata); layouter.perform(signaturePreviewControl); } private Text createTextInputField(Composite parent, int style) { Text result = new Text(parent, style); result.addModifyListener(new ModifyListener() { @Override public void modifyText(ModifyEvent e) { textModified(getText()); } }); TextFieldNavigationHandler.install(result); return result; } private String getLabelText() { return RefactoringMessages.ExtractMethodInputPage_label_text; } private String getText() { if (fTextField == null) { return null; } return fTextField.getText(); } private void loadSettings() { // TODO(scheglov) // fSettings = getDialogSettings().getSection(ExtractMethodWizard.DIALOG_SETTING_SECTION); // if (fSettings == null) { // fSettings = getDialogSettings().addNewSection(ExtractMethodWizard.DIALOG_SETTING_SECTION); // fSettings.put( // GENERATE_JAVADOC, // JavaPreferencesSettings.getCodeGenerationSettings(fRefactoring.getCompilationUnit().getJavaProject()).createComments); // } } private void parameterModified() { updatePreview(getText()); setPageComplete(validatePage(false)); } // private void setGenerateJavadoc(boolean value) { // fSettings.put(GENERATE_JAVADOC, value); // fRefactoring.setGenerateJavadoc(value); // } private void textModified(String text) { fRefactoring.setMethodName(text); RefactoringStatus status = validatePage(true); if (!status.hasFatalError()) { updatePreview(text); } else { fSignaturePreviewDocument.set(""); //$NON-NLS-1$ } setPageComplete(status); } private void updatePreview(String text) { if (fSignaturePreview == null) { return; } if (text.length() == 0) { text = "someMethodName"; //$NON-NLS-1$ } int top = fSignaturePreview.getTextWidget().getTopPixel(); String signature; try { signature = fRefactoring.getSignature(text); } catch (IllegalArgumentException e) { signature = ""; //$NON-NLS-1$ } fSignaturePreviewDocument.set(signature); fSignaturePreview.getTextWidget().setTopPixel(top); } private RefactoringStatus validateMethodName() { RefactoringStatus result = new RefactoringStatus(); String text = getText(); if ("".equals(text)) { //$NON-NLS-1$ result.addFatalError(RefactoringMessages.ExtractMethodInputPage_validation_emptyMethodName); return result; } result.merge(fRefactoring.checkMethodName()); return result; } private RefactoringStatus validatePage(boolean text) { RefactoringStatus result = new RefactoringStatus(); if (text) { result.merge(validateMethodName()); result.merge(validateParameters()); } else { result.merge(validateParameters()); result.merge(validateMethodName()); } return result; } private RefactoringStatus validateParameters() { RefactoringStatus result = new RefactoringStatus(); for (ParameterInfo parameter : fRefactoring.getParameters()) { if ("".equals(parameter.getNewName())) { result.addFatalError(RefactoringMessages.ExtractMethodInputPage_validation_emptyParameterName); return result; } } result.merge(fRefactoring.checkParameterNames()); return result; } }