| /******************************************************************************* |
| * Copyright (c) 2000, 2004 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Common Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/cpl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.team.internal.ccvs.ui.repo; |
| |
| import java.io.UnsupportedEncodingException; |
| import java.util.Collections; |
| |
| import org.eclipse.jface.dialogs.Dialog; |
| import org.eclipse.jface.preference.FieldEditor; |
| import org.eclipse.jface.preference.IPreferenceStore; |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.events.*; |
| import org.eclipse.swt.graphics.*; |
| import org.eclipse.swt.layout.GridData; |
| import org.eclipse.swt.layout.GridLayout; |
| import org.eclipse.swt.widgets.*; |
| import org.eclipse.team.internal.ccvs.ui.Policy; |
| import org.eclipse.ui.WorkbenchEncoding; |
| import org.eclipse.ui.ide.IDEEncoding; |
| |
| /** |
| * A field editor that allows the user to choose an encoding. |
| */ |
| public class EncodingFieldEditor extends FieldEditor { |
| private Composite container; |
| private Button defaultEncodingButton; |
| private String defaultEnc; |
| private Button otherEncodingButton; |
| private Combo encodingCombo; |
| private boolean isValid = true; |
| private String oldSelectedEncoding; |
| |
| /** |
| * Create an encoding filed editor. |
| * @param name the name of the preference this field editor works on |
| * @param labelText the label text of the field editor |
| * @param parent the parent of the field editor's control |
| */ |
| public EncodingFieldEditor(String name, String labelText, Composite parent) { |
| super(name, labelText, parent); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.jface.preference.FieldEditor#adjustForNumColumns(int) |
| */ |
| protected void adjustForNumColumns(int numColumns) { |
| ((GridData)getContainer().getLayoutData()).horizontalSpan = numColumns; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.jface.preference.FieldEditor#doFillIntoGrid(org.eclipse.swt.widgets.Composite, int) |
| */ |
| protected void doFillIntoGrid(Composite parent, int numColumns) { |
| container = createEncodingGroup(parent, numColumns); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.jface.preference.FieldEditor#doLoad() |
| */ |
| protected void doLoad() { |
| if (encodingCombo != null) { |
| String value = getPreferenceStore().getString(getPreferenceName()); |
| if (value.equals(defaultEnc)) { |
| doLoadDefault(); |
| } else { |
| encodingCombo.setText(value); |
| oldSelectedEncoding = value; |
| updateEncodingState(false); |
| } |
| } |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.jface.preference.FieldEditor#doLoadDefault() |
| */ |
| protected void doLoadDefault() { |
| updateEncodingState(true); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.jface.preference.FieldEditor#doStore() |
| */ |
| protected void doStore() { |
| String encoding = getSelectedEncoding(); |
| if (encoding.equals(defaultEnc)) { |
| getPreferenceStore().setToDefault(getPreferenceName()); |
| } else { |
| getPreferenceStore().setValue(getPreferenceName(), encoding); |
| } |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.jface.preference.FieldEditor#getNumberOfControls() |
| */ |
| public int getNumberOfControls() { |
| return 1; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.jface.preference.FieldEditor#isValid() |
| */ |
| public boolean isValid() { |
| return isValid; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.jface.preference.FieldEditor#refreshValidState() |
| */ |
| protected void refreshValidState() { |
| updateValidState(); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.jface.preference.FieldEditor#setPreferenceStore(org.eclipse.jface.preference.IPreferenceStore) |
| */ |
| public void setPreferenceStore(IPreferenceStore store) { |
| super.setPreferenceStore(store); |
| defaultEnc = store.getDefaultString(getPreferenceName()); |
| updateDefaultEncoding(); |
| } |
| |
| private void updateDefaultEncoding() { |
| defaultEncodingButton.setText(Policy.bind("WorkbenchPreference.defaultEncoding", defaultEnc)); //$NON-NLS-1$ |
| } |
| |
| private Composite getContainer() { |
| return container; |
| } |
| |
| private Group createEncodingGroup(Composite parent, int numColumns) { |
| |
| Font font = parent.getFont(); |
| Group group = new Group(parent, SWT.NONE); |
| GridData data = new GridData(GridData.FILL_HORIZONTAL); |
| data.horizontalSpan = numColumns; |
| group.setLayoutData(data); |
| GridLayout layout = new GridLayout(); |
| layout.numColumns = 2; |
| group.setLayout(layout); |
| group.setText(getLabelText()); |
| group.setFont(font); |
| |
| SelectionAdapter buttonListener = new SelectionAdapter() { |
| public void widgetSelected(SelectionEvent e) { |
| updateEncodingState(defaultEncodingButton.getSelection()); |
| updateValidState(); |
| } |
| }; |
| |
| if (defaultEnc == null) { |
| defaultEnc = WorkbenchEncoding.getWorkbenchDefaultEncoding(); |
| } |
| defaultEncodingButton = new Button(group, SWT.RADIO); |
| updateDefaultEncoding(); |
| data = new GridData(); |
| data.horizontalSpan = 2; |
| defaultEncodingButton.setLayoutData(data); |
| defaultEncodingButton.addSelectionListener(buttonListener); |
| defaultEncodingButton.setFont(font); |
| |
| otherEncodingButton = new Button(group, SWT.RADIO); |
| otherEncodingButton.setText(Policy.bind("WorkbenchPreference.otherEncoding")); //$NON-NLS-1$ |
| otherEncodingButton.addSelectionListener(buttonListener); |
| otherEncodingButton.setFont(font); |
| |
| encodingCombo = new Combo(group, SWT.NONE); |
| encodingCombo.setFont(font); |
| data = new GridData(); |
| data.widthHint = convertWidthInCharsToPixels(encodingCombo, 15); |
| encodingCombo.setLayoutData(data); |
| encodingCombo.addModifyListener(new ModifyListener() { |
| public void modifyText(ModifyEvent e) { |
| updateValidState(); |
| } |
| }); |
| encodingCombo.addSelectionListener(new SelectionAdapter() { |
| public void widgetSelected(SelectionEvent e) { |
| updateValidState(); |
| } |
| }); |
| |
| java.util.List encodings = IDEEncoding.getIDEEncodings(); |
| |
| if (!encodings.contains(defaultEnc)) { |
| encodings.add(defaultEnc); |
| } |
| |
| String enc = IDEEncoding.getResourceEncoding(); |
| boolean isDefault = enc == null || enc.length() == 0; |
| |
| Collections.sort(encodings); |
| for (int i = 0; i < encodings.size(); ++i) { |
| encodingCombo.add((String) encodings.get(i)); |
| } |
| |
| encodingCombo.setText(isDefault ? defaultEnc : enc); |
| |
| updateEncodingState(isDefault); |
| return group; |
| } |
| |
| private int convertWidthInCharsToPixels(Control control, int chars) { |
| GC gc= new GC(control); |
| gc.setFont(control.getFont()); |
| FontMetrics fontMetrics = gc.getFontMetrics(); |
| int result = Dialog.convertWidthInCharsToPixels(fontMetrics, chars); |
| gc.dispose(); |
| return result; |
| } |
| |
| private void updateEncodingState(boolean useDefault) { |
| defaultEncodingButton.setSelection(useDefault); |
| otherEncodingButton.setSelection(!useDefault); |
| encodingCombo.setEnabled(!useDefault); |
| updateValidState(); |
| } |
| |
| private void updateValidState() { |
| boolean isValidNow = isEncodingValid(); |
| if (isValidNow != isValid) { |
| isValid = isValidNow; |
| if (isValid) { |
| clearErrorMessage(); |
| } else { |
| showErrorMessage(Policy.bind("WorkbenchPreference.unsupportedEncoding")); //$NON-NLS-1$ |
| } |
| fireStateChanged(IS_VALID, !isValid, isValid); |
| |
| String newValue = getSelectedEncoding(); |
| if (isValid && !newValue.equals(oldSelectedEncoding)) { |
| fireValueChanged(VALUE, oldSelectedEncoding, newValue); |
| oldSelectedEncoding = newValue; |
| } |
| } |
| } |
| |
| private String getSelectedEncoding() { |
| if (defaultEncodingButton.getSelection()) { |
| return defaultEnc; |
| } |
| else { |
| return encodingCombo.getText(); |
| } |
| } |
| |
| private boolean isEncodingValid() { |
| return defaultEncodingButton.getSelection() || |
| isValidEncoding(encodingCombo.getText()); |
| } |
| |
| private boolean isValidEncoding(String enc) { |
| try { |
| new String(new byte[0], enc); |
| return true; |
| } catch (UnsupportedEncodingException e) { |
| return false; |
| } |
| } |
| } |