Avoid NPE for "mark occurences"
[phpeclipse.git] / net.sourceforge.phpeclipse / src / net / sourceforge / phpeclipse / wizards / PHPFileWizardPage.java
1 package net.sourceforge.phpeclipse.wizards;
2
3 /**********************************************************************
4  Copyright (c) 2000, 2002 IBM Corp. and others.
5  All rights reserved. This program and the accompanying materials
6  are made available under the terms of the Common Public License v1.0
7  which accompanies this distribution, and is available at
8  http://www.eclipse.org/legal/cpl-v10.html
9
10  Contributors:
11  IBM Corporation - Initial implementation
12  www.phpeclipse.de
13  **********************************************************************/
14
15 import org.eclipse.core.resources.IContainer;
16 import org.eclipse.core.resources.IResource;
17 import org.eclipse.core.resources.ResourcesPlugin;
18 import org.eclipse.core.runtime.IPath;
19 import org.eclipse.core.runtime.Path;
20 import org.eclipse.jface.dialogs.IDialogPage;
21 import org.eclipse.jface.viewers.ISelection;
22 import org.eclipse.jface.viewers.IStructuredSelection;
23 import org.eclipse.jface.wizard.WizardPage;
24 import org.eclipse.swt.SWT;
25 import org.eclipse.swt.events.ModifyEvent;
26 import org.eclipse.swt.events.ModifyListener;
27 import org.eclipse.swt.events.SelectionAdapter;
28 import org.eclipse.swt.events.SelectionEvent;
29 import org.eclipse.swt.layout.GridData;
30 import org.eclipse.swt.layout.GridLayout;
31 import org.eclipse.swt.widgets.Button;
32 import org.eclipse.swt.widgets.Composite;
33 import org.eclipse.swt.widgets.Label;
34 import org.eclipse.swt.widgets.Text;
35 import org.eclipse.ui.dialogs.ContainerSelectionDialog;
36
37 /**
38  * The "New" wizard page allows setting the container for the new file as well
39  * as the file name. The page will only accept file name without the extension
40  * OR with the extension that matches the expected one (cs).
41  */
42
43 public class PHPFileWizardPage extends WizardPage {
44   private static final String INITIAL_FILENAME = "file.php";
45
46 private Text containerText;
47
48   private Text fileText;
49
50   private ISelection selection;
51
52   /**
53    * Constructor for SampleNewWizardPage.
54    * 
55    * @param pageName
56    */
57   public PHPFileWizardPage(ISelection selection) {
58     super("wizardPage");
59     setTitle(PHPWizardMessages.getString("WizardPage.title"));
60     setDescription(PHPWizardMessages.getString("WizardPage.description"));
61     this.selection = selection;
62   }
63
64   /**
65    * @see IDialogPage#createControl(Composite)
66    */
67   public void createControl(Composite parent) {
68     Composite container = new Composite(parent, SWT.NULL);
69     GridLayout layout = new GridLayout();
70     container.setLayout(layout);
71     layout.numColumns = 3;
72     layout.verticalSpacing = 9;
73     Label label = new Label(container, SWT.NULL);
74     label.setText(PHPWizardMessages.getString("WizardPage.containerLabel"));
75
76     containerText = new Text(container, SWT.BORDER | SWT.SINGLE);
77     GridData gd = new GridData(GridData.FILL_HORIZONTAL);
78     containerText.setLayoutData(gd);
79     containerText.addModifyListener(new ModifyListener() {
80       public void modifyText(ModifyEvent e) {
81         dialogChanged();
82       }
83     });
84
85     Button button = new Button(container, SWT.PUSH);
86     button.setText(PHPWizardMessages.getString("WizardPage.browseButtonText"));
87     button.addSelectionListener(new SelectionAdapter() {
88       public void widgetSelected(SelectionEvent e) {
89         handleBrowse();
90       }
91     });
92     label = new Label(container, SWT.NULL);
93     label.setText(PHPWizardMessages.getString("WizardPage.fileLabel"));
94
95     fileText = new Text(container, SWT.BORDER | SWT.SINGLE);
96     gd = new GridData(GridData.FILL_HORIZONTAL);
97     fileText.setLayoutData(gd);
98     fileText.addModifyListener(new ModifyListener() {
99       public void modifyText(ModifyEvent e) {
100         dialogChanged();
101       }
102     });
103     initialize();
104     dialogChanged();
105     setControl(container);
106   }
107
108   /**
109    * Tests if the current workbench selection is a suitable container to use.
110    */
111
112   private void initialize() {
113     if (selection != null && selection.isEmpty() == false
114         && selection instanceof IStructuredSelection) {
115       IStructuredSelection ssel = (IStructuredSelection) selection;
116       if (ssel.size() > 1)
117         return;
118       Object obj = ssel.getFirstElement();
119       if (obj instanceof IResource) {
120         IContainer container;
121         if (obj instanceof IContainer)
122           container = (IContainer) obj;
123         else
124           container = ((IResource) obj).getParent();
125         containerText.setText(container.getFullPath().toString());
126         fileText.setFocus();
127       }
128     }
129     fileText.setText(INITIAL_FILENAME);
130   }
131
132   /**
133    * Uses the standard container selection dialog to choose the new value for
134    * the container field.
135    */
136
137   private void handleBrowse() {
138     ContainerSelectionDialog dialog = new ContainerSelectionDialog(getShell(),
139         ResourcesPlugin.getWorkspace().getRoot(), false, PHPWizardMessages
140             .getString("WizardPage.selectNewFileContainer"));
141     if (dialog.open() == ContainerSelectionDialog.OK) {
142       Object[] results = dialog.getResult();
143       if (results.length == 1) {
144           Object result=results[0];
145           if (result instanceof IPath) {
146                   IPath ipath = (IPath) result;
147                   containerText.setText(ipath.toString());
148           }
149       }
150     }
151   }
152
153   /**
154    * Ensures that both text fields are set.
155    */
156   private void dialogChanged() {
157     String container = getContainerName();
158     String fileName = getFileName();
159
160     if (container.length() == 0) {
161       updateStatus(PHPWizardMessages
162           .getString("WizardPage.containerMustBeSpecified"));
163       return;
164     }
165     if (fileName.length() == 0) {
166       updateStatus("WizardPage.nameMustBeSpecified");
167       return;
168     }
169
170     updateStatus(null);
171   }
172
173   private void updateStatus(String message) {
174     setErrorMessage(message);
175     setPageComplete(message == null);
176   }
177
178   public String getContainerName() {
179     return containerText.getText();
180   }
181
182   public String getFileName() {
183     return fileText.getText();
184   }
185
186   /**
187    * @see WizardPage#isPageComplete()
188    */
189   public boolean isPageComplete() {
190     return !checkFolderForExistingFile() && super.isPageComplete();
191   }
192
193   /**
194          * Finds the current directory where the file should be created
195          */
196         protected boolean checkFolderForExistingFile() {
197                 IContainer container = getFileContainer();
198                 if (container != null) {
199                         IResource file = container.getFile(new Path(fileText.getText()
200                                         .trim()));
201                         if (file != null && file.exists()) {
202                                 this.setErrorMessage(PHPWizardMessages
203                                                 .getString("WizardPage.fileAlreadyExists"));
204                                 return true;
205                         }
206
207                         ((PHPFileWizard) this.getWizard()).setFileName(fileText.getText()
208                                         .trim());
209                 }
210                 return false;
211         }
212
213         private IContainer getFileContainer() {
214                 if (containerText.getText() != null) {
215                         IPath containerPath = new Path(containerText.getText().trim());
216                         IContainer container;
217                         if (containerPath.segmentCount() > 1) {
218                                 container = ResourcesPlugin.getWorkspace().getRoot().getFolder(
219                                                 containerPath);
220                         } else {
221                                 // this is a project
222                                 container = ResourcesPlugin.getWorkspace().getRoot()
223                                                 .getProject(containerText.getText().trim());
224                         }
225                         if (container != null && container.exists()) {
226                                 return container;
227                         }
228                 }
229                 return null;
230         }
231
232         public void setVisible(boolean visible) {
233                 super.setVisible(visible);
234                 if (visible) {
235                         String fileName=fileText.getText().trim();
236                         if (getFileContainer() != null && fileName.equalsIgnoreCase(INITIAL_FILENAME)) {
237                                 fileText.setFocus();
238                                 fileText.setText(fileName);
239                                 fileText.setSelection(0, fileName.length()-(new Path(INITIAL_FILENAME)).getFileExtension().length()-1);
240                         }
241                 }
242         }
243
244 }