Java tutorial
/* * Copyright (C) 2011 The Android Open Source Project * * Licensed under the Eclipse Public License, Version 1.0 (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/org/documents/epl-v10.php * * 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.android.ide.eclipse.adt.internal.refactorings.extractstring; import com.android.ide.eclipse.adt.AdtPlugin; import com.android.ide.eclipse.adt.AdtUtils; import org.eclipse.core.resources.IFile; import org.eclipse.jdt.core.IBuffer; import org.eclipse.jdt.core.JavaModelException; import org.eclipse.jdt.core.dom.ASTNode; import org.eclipse.jdt.ui.text.java.IInvocationContext; import org.eclipse.jdt.ui.text.java.IJavaCompletionProposal; import org.eclipse.jface.text.IDocument; import org.eclipse.jface.text.ITextSelection; import org.eclipse.jface.text.TextSelection; import org.eclipse.jface.text.contentassist.IContextInformation; import org.eclipse.ltk.ui.refactoring.RefactoringWizard; import org.eclipse.ltk.ui.refactoring.RefactoringWizardOpenOperation; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.graphics.Point; import org.eclipse.ui.IEditorPart; import org.eclipse.ui.IWorkbenchWindow; import org.eclipse.ui.PlatformUI; /** * Proposal for extracting strings in Java files */ public class ExtractStringProposal implements IJavaCompletionProposal { private IInvocationContext mContext; public ExtractStringProposal(IInvocationContext context) { mContext = context; } @Override public void apply(IDocument document) { IEditorPart editor = AdtUtils.getActiveEditor(); IFile file = AdtUtils.getActiveFile(); if (editor == null || file == null) { return; } ASTNode coveringNode = mContext.getCoveringNode(); int start = coveringNode.getStartPosition(); int length = coveringNode.getLength(); ITextSelection selection = new TextSelection(start, length); ExtractStringRefactoring refactoring = new ExtractStringRefactoring(file, editor, selection); RefactoringWizard wizard = new ExtractStringWizard(refactoring, file.getProject()); RefactoringWizardOpenOperation op = new RefactoringWizardOpenOperation(wizard); try { IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow(); op.run(window.getShell(), wizard.getDefaultPageTitle()); } catch (InterruptedException e) { } } @Override public Point getSelection(IDocument document) { return null; } @Override public String getAdditionalProposalInfo() { try { ASTNode coveringNode = mContext.getCoveringNode(); int start = coveringNode.getStartPosition(); int length = coveringNode.getLength(); IBuffer buffer = mContext.getCompilationUnit().getBuffer(); StringBuilder sb = new StringBuilder(); String string = buffer.getText(start, length); string = ExtractStringRefactoring.unquoteAttrValue(string); String token = ExtractStringInputPage.guessId(string); // Look up the beginning and the end of the line (outside of the extracted string) // such that we can show a preview of the diff, e.g. if you have // foo.setTitle("Hello"); we want to show foo.setTitle(R.string.hello); // so we need to extract "foo.setTitle(" and ");". // Look backwards to the beginning of the line (and strip whitespace) int i = start - 1; while (i > 0) { char c = buffer.getChar(i); if (c == '\r' || (c == '\n')) { break; } i--; } String linePrefix = buffer.getText(i + 1, start - (i + 1)).trim(); // Look forwards to the end of the line (and strip whitespace) i = start + length; while (i < buffer.getLength()) { char c = buffer.getChar(i); if (c == '\r' || (c == '\n')) { break; } i++; } String lineSuffix = buffer.getText(start + length, i - (start + length)); // Should we show the replacement as just R.string.foo or // context.getString(R.string.foo) ? boolean useContext = false; ASTNode parent = coveringNode.getParent(); if (parent != null) { int type = parent.getNodeType(); if (type == ASTNode.ASSIGNMENT || type == ASTNode.VARIABLE_DECLARATION_STATEMENT || type == ASTNode.VARIABLE_DECLARATION_FRAGMENT || type == ASTNode.VARIABLE_DECLARATION_EXPRESSION) { useContext = true; } } // Display .java change: sb.append("...<br>"); //$NON-NLS-1$ sb.append(linePrefix); sb.append("<b>"); //$NON-NLS-1$ if (useContext) { sb.append("context.getString("); //$NON-NLS-1$ } sb.append("R.string."); //$NON-NLS-1$ sb.append(token); if (useContext) { sb.append(")"); //$NON-NLS-1$ } sb.append("</b>"); //$NON-NLS-1$ sb.append(lineSuffix); sb.append("<br>...<br>"); //$NON-NLS-1$ // Display strings.xml change: sb.append("<br>"); //$NON-NLS-1$ sb.append("<resources><br>"); //$NON-NLS-1$ sb.append(" <b><string name=\""); //$NON-NLS-1$ sb.append(token); sb.append("\">"); //$NON-NLS-1$ sb.append(string); sb.append("</string></b><br>"); //$NON-NLS-1$ sb.append("</resources>"); //$NON-NLS-1$ return sb.toString(); } catch (JavaModelException e) { AdtPlugin.log(e, null); } return "Initiates the Extract String refactoring operation"; } @Override public String getDisplayString() { return "Extract String"; } @Override public Image getImage() { return AdtPlugin.getAndroidLogo(); } @Override public IContextInformation getContextInformation() { return null; } @Override public int getRelevance() { return 80; } }