Java tutorial
/******************************************************************************* * Copyright (c) 2006, 2011 IBM Corporation and others. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors: * IBM Corporation - initial API and implementation *******************************************************************************/ package org.eclipse.compare.internal.patch; import java.util.ArrayList; import org.eclipse.compare.internal.core.patch.DiffProject; import org.eclipse.compare.internal.core.patch.FilePatch2; import org.eclipse.compare.internal.core.patch.Hunk; import org.eclipse.core.resources.*; import org.eclipse.core.runtime.Assert; import org.eclipse.jface.dialogs.Dialog; import org.eclipse.jface.dialogs.IDialogConstants; import org.eclipse.jface.viewers.*; import org.eclipse.osgi.util.NLS; import org.eclipse.swt.SWT; import org.eclipse.swt.graphics.Point; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.*; import org.eclipse.ui.model.BaseWorkbenchContentProvider; import org.eclipse.ui.model.WorkbenchLabelProvider; import org.eclipse.ui.views.navigator.ResourceComparator; class RetargetPatchElementDialog extends Dialog { private static class RetargetPatchContentProvider extends BaseWorkbenchContentProvider { private final PatchDiffNode node; public RetargetPatchContentProvider(PatchDiffNode node) { this.node = node; } public Object[] getChildren(Object element) { if (element instanceof IWorkspaceRoot) { // Don't show closed projects IProject[] allProjects = ((IWorkspaceRoot) element).getProjects(); ArrayList accessibleProjects = new ArrayList(); for (int i = 0; i < allProjects.length; i++) { if (allProjects[i].isOpen()) { accessibleProjects.add(allProjects[i]); } } return accessibleProjects.toArray(); } // When retargeting a diff project, don't support expansion if (element instanceof IProject && node instanceof PatchProjectDiffNode) { return new Object[0]; } return super.getChildren(element); } } private final PatchDiffNode fSelectedNode; private final WorkspacePatcher fPatcher; private TreeViewer fViewer; private IResource fSelectedResource; public RetargetPatchElementDialog(Shell shell, WorkspacePatcher patcher, PatchDiffNode node) { super(shell); Assert.isNotNull(patcher); Assert.isNotNull(node); setShellStyle(getShellStyle() | SWT.RESIZE); this.fPatcher = patcher; fSelectedNode = node; } protected Control createButtonBar(Composite parent) { Control control = super.createButtonBar(parent); Button okButton = this.getButton(IDialogConstants.OK_ID); okButton.setEnabled(false); return control; } protected Control createDialogArea(Composite parent) { Composite composite = (Composite) super.createDialogArea(parent); initializeDialogUnits(parent); getShell().setText(PatchMessages.PreviewPatchPage_RetargetPatch); GridLayout layout = new GridLayout(); layout.numColumns = 1; layout.marginHeight = convertVerticalDLUsToPixels(IDialogConstants.VERTICAL_MARGIN); layout.marginWidth = convertHorizontalDLUsToPixels(IDialogConstants.HORIZONTAL_MARGIN); composite.setLayout(layout); final GridData data = new GridData(SWT.FILL, SWT.FILL, true, true); composite.setLayoutData(data); //add controls to composite as necessary Label label = new Label(composite, SWT.LEFT | SWT.WRAP); label.setText(getTreeLabel()); final GridData data2 = new GridData(SWT.FILL, SWT.BEGINNING, true, false); label.setLayoutData(data2); fViewer = new TreeViewer(composite, SWT.BORDER); GridData gd = new GridData(SWT.FILL, SWT.FILL, true, true); gd.widthHint = 0; gd.heightHint = 0; fViewer.getTree().setLayoutData(gd); fViewer.setContentProvider(new RetargetPatchContentProvider(fSelectedNode)); fViewer.setLabelProvider(new WorkbenchLabelProvider()); fViewer.setComparator(new ResourceComparator(ResourceComparator.NAME)); fViewer.setInput(getViewerInput()); IResource resource = getInitialSelection(); if (resource != null) { fViewer.setSelection(new StructuredSelection(resource)); fViewer.expandToLevel(resource, 0); } setupListeners(); Dialog.applyDialogFont(composite); return parent; } private IResource getViewerInput() { if (fPatcher.isWorkspacePatch()) return ResourcesPlugin.getWorkspace().getRoot(); return fPatcher.getTarget(); } private IResource getInitialSelection() { if (fSelectedNode instanceof PatchFileDiffNode) { PatchFileDiffNode node = (PatchFileDiffNode) fSelectedNode; return fPatcher.getTargetFile(node.getDiffResult().getDiff()); } else if (fSelectedNode instanceof HunkDiffNode) { HunkDiffNode node = (HunkDiffNode) fSelectedNode; return fPatcher.getTargetFile(node.getHunkResult().getDiffResult().getDiff()); } else if (fSelectedNode instanceof PatchProjectDiffNode) { PatchProjectDiffNode node = (PatchProjectDiffNode) fSelectedNode; DiffProject diffProject = node.getDiffProject(); return Utilities.getProject(diffProject); } return null; } private String getTreeLabel() { if (fSelectedNode instanceof PatchProjectDiffNode) { PatchProjectDiffNode node = (PatchProjectDiffNode) fSelectedNode; DiffProject project = node.getDiffProject(); return NLS.bind(PatchMessages.PreviewPatchPage_SelectProject, project.getName()); } else if (fSelectedNode instanceof PatchFileDiffNode) { PatchFileDiffNode node = (PatchFileDiffNode) fSelectedNode; //copy over all hunks to new target resource FilePatch2 diff = node.getDiffResult().getDiff(); return NLS.bind(PatchMessages.RetargetPatchElementDialog_0, fPatcher.getPath(diff)); } else if (fSelectedNode instanceof HunkDiffNode) { HunkDiffNode node = (HunkDiffNode) fSelectedNode; Hunk hunk = node.getHunkResult().getHunk(); return NLS.bind(PatchMessages.RetargetPatchElementDialog_1, fPatcher.getPath(hunk.getParent())); } return ""; //$NON-NLS-1$ } protected void okPressed() { if (fSelectedResource != null) { if (fSelectedNode instanceof PatchProjectDiffNode && fSelectedResource instanceof IProject) { PatchProjectDiffNode node = (PatchProjectDiffNode) fSelectedNode; DiffProject project = node.getDiffProject(); fPatcher.retargetProject(project, (IProject) fSelectedResource); } else if (fSelectedNode instanceof PatchFileDiffNode && fSelectedResource instanceof IFile) { PatchFileDiffNode node = (PatchFileDiffNode) fSelectedNode; //copy over all hunks to new target resource FilePatch2 diff = node.getDiffResult().getDiff(); fPatcher.retargetDiff(diff, (IFile) fSelectedResource); } else if (fSelectedNode instanceof HunkDiffNode && fSelectedResource instanceof IFile) { HunkDiffNode node = (HunkDiffNode) fSelectedNode; fPatcher.retargetHunk(node.getHunkResult().getHunk(), (IFile) fSelectedResource); } } super.okPressed(); } void setupListeners() { fViewer.addSelectionChangedListener(new ISelectionChangedListener() { public void selectionChanged(SelectionChangedEvent event) { IStructuredSelection s = (IStructuredSelection) event.getSelection(); Object obj = s.getFirstElement(); if (obj instanceof IResource) { fSelectedResource = (IResource) obj; if (fSelectedNode instanceof PatchProjectDiffNode) { if (fSelectedResource instanceof IProject) { Button okButton = getButton(IDialogConstants.OK_ID); okButton.setEnabled(true); } } else if (fSelectedNode instanceof PatchFileDiffNode || fSelectedNode instanceof HunkDiffNode) { if (fSelectedResource instanceof IFile) { Button okButton = getButton(IDialogConstants.OK_ID); okButton.setEnabled(true); } } } } }); fViewer.addDoubleClickListener(new IDoubleClickListener() { public void doubleClick(DoubleClickEvent event) { ISelection s = event.getSelection(); if (s instanceof IStructuredSelection) { Object item = ((IStructuredSelection) s).getFirstElement(); if (fViewer.getExpandedState(item)) fViewer.collapseToLevel(item, 1); else fViewer.expandToLevel(item, 1); } } }); } protected Point getInitialSize() { final Point size = super.getInitialSize(); size.x = convertWidthInCharsToPixels(75); size.y += convertHeightInCharsToPixels(20); return size; } }