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   1 /*******************************************************************************
   2  * Copyright (c) 2000, 2003 IBM Corporation and others.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Common Public License v1.0
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/cpl-v10.html
   7  *
   8  * Contributors:
   9  *     IBM Corporation - initial API and implementation
  10  *******************************************************************************/
  11
  12 package net.sourceforge.phpdt.internal.ui.preferences;
  13
  14 import java.util.HashMap;
  15 import java.util.StringTokenizer;
  16
  17 import net.sourceforge.phpdt.internal.ui.dialogs.StatusInfo;
  18 import net.sourceforge.phpdt.internal.ui.dialogs.StatusUtil;
  19 import net.sourceforge.phpdt.internal.ui.text.java.hover.JavaEditorTextHoverDescriptor;
  20 import net.sourceforge.phpdt.internal.ui.util.PixelConverter;
  21 import net.sourceforge.phpdt.ui.PreferenceConstants;
  22 import net.sourceforge.phpeclipse.PHPeclipsePlugin;
  23
  24 import org.eclipse.core.runtime.IStatus;
  25 import org.eclipse.jface.action.Action;
  26 import org.eclipse.jface.dialogs.Dialog;
  27 import org.eclipse.jface.preference.IPreferenceStore;
  28 import org.eclipse.jface.text.Assert;
  29 import org.eclipse.swt.SWT;
  30 import org.eclipse.swt.events.KeyEvent;
  31 import org.eclipse.swt.events.KeyListener;
  32 import org.eclipse.swt.events.ModifyEvent;
  33 import org.eclipse.swt.events.ModifyListener;
  34 import org.eclipse.swt.events.SelectionEvent;
  35 import org.eclipse.swt.events.SelectionListener;
  36 import org.eclipse.swt.graphics.Point;
  37 import org.eclipse.swt.layout.GridData;
  38 import org.eclipse.swt.layout.GridLayout;
  39 import org.eclipse.swt.widgets.Button;
  40 import org.eclipse.swt.widgets.Composite;
  41 import org.eclipse.swt.widgets.Control;
  42 import org.eclipse.swt.widgets.Label;
  43 import org.eclipse.swt.widgets.List;
  44 import org.eclipse.swt.widgets.Text;
  45
  46 /**
  47  * Configures Java Editor hover preferences.
  48  *
  49  * @since 2.1
  50  */
  51 class JavaEditorHoverConfigurationBlock {
  52
  53         private static final String DELIMITER= PreferencesMessages.getString("JavaEditorHoverConfigurationBlock.delimiter"); //$NON-NLS-1$
  54
  55         // Data structure to hold the values which are edited by the user
  56         private static class HoverConfig {
  57
  58                 private String fModifierString;
  59                 private boolean fIsEnabled;
  60                 private int fStateMask;
  61
  62                 private HoverConfig(String modifier, int stateMask, boolean enabled) {
  63                         fModifierString= modifier;
  64                         fIsEnabled= enabled;
  65                         fStateMask= stateMask;
  66                 }
  67         }
  68
  69         private IPreferenceStore fStore;
  70         private HoverConfig[] fHoverConfigs;
  71         private Text fModifierEditor;
  72         private Button fEnableField;
  73         private List fHoverList;
  74         private Text fDescription;
  75 //      private Button fShowHoverAffordanceCheckbox;
  76
  77         private JavaEditorPreferencePage fMainPreferencePage;
  78
  79         private StatusInfo fStatus;
  80
  81         public JavaEditorHoverConfigurationBlock(JavaEditorPreferencePage mainPreferencePage, IPreferenceStore store) {
  82                 Assert.isNotNull(mainPreferencePage);
  83                 Assert.isNotNull(store);
  84                 fMainPreferencePage= mainPreferencePage;
  85                 fStore= store;
  86         }
  87
  88         /**
  89          * Creates page for hover preferences.
  90          */
  91         public Control createControl(Composite parent) {
  92
  93                 PixelConverter pixelConverter= new PixelConverter(parent);
  94
  95                 Composite hoverComposite= new Composite(parent, SWT.NULL);
  96                 GridLayout layout= new GridLayout();
  97                 layout.numColumns= 2;
  98                 hoverComposite.setLayout(layout);
  99                 GridData gd= new GridData(GridData.GRAB_HORIZONTAL | GridData.VERTICAL_ALIGN_FILL);
 100                 hoverComposite.setLayoutData(gd);
 101
 102                 Label label= new Label(hoverComposite, SWT.NONE);
 103                 label.setText(PreferencesMessages.getString("JavaEditorHoverConfigurationBlock.hoverPreferences")); //$NON-NLS-1$
 104                 gd= new GridData(GridData.FILL_HORIZONTAL);
 105                 gd.horizontalAlignment= GridData.BEGINNING;
 106                 gd.horizontalSpan= 2;
 107                 label.setLayoutData(gd);
 108                 gd= new GridData(GridData.GRAB_HORIZONTAL | GridData.VERTICAL_ALIGN_FILL);
 109
 110                 // Hover list
 111                 fHoverList= new List(hoverComposite, SWT.SINGLE | SWT.V_SCROLL | SWT.BORDER);
 112                 gd= new GridData(GridData.VERTICAL_ALIGN_BEGINNING | GridData.FILL_HORIZONTAL);
 113                 int listHeight= 10 * fHoverList.getItemHeight();
 114                 gd.heightHint= listHeight;
 115                 fHoverList.setLayoutData(gd);
 116                 fHoverList.addSelectionListener(new SelectionListener() {
 117                         public void widgetSelected(SelectionEvent e) {
 118                                 handleHoverListSelection();
 119                         }
 120                         public void widgetDefaultSelected(SelectionEvent e) {
 121                         }
 122                 });
 123
 124
 125                 Composite stylesComposite= new Composite(hoverComposite, SWT.NONE);
 126                 layout= new GridLayout();
 127                 layout.marginHeight= 0;
 128                 layout.marginWidth= 0;
 129                 layout.numColumns= 2;
 130                 stylesComposite.setLayout(layout);
 131                 gd= new GridData(GridData.FILL_HORIZONTAL);
 132                 gd.heightHint= listHeight + (2 * fHoverList.getBorderWidth());
 133                 stylesComposite.setLayoutData(gd);
 134
 135                 // Enabled checkbox
 136                 fEnableField= new Button(stylesComposite, SWT.CHECK);
 137                 fEnableField.setText(PreferencesMessages.getString("JavaEditorHoverConfigurationBlock.enabled")); //$NON-NLS-1$
 138                 gd= new GridData(GridData.FILL_HORIZONTAL);
 139                 gd.horizontalAlignment= GridData.BEGINNING;
 140                 gd.horizontalSpan= 2;
 141                 fEnableField.setLayoutData(gd);
 142                 fEnableField.addSelectionListener(new SelectionListener() {
 143                         public void widgetSelected(SelectionEvent e) {
 144                                 int i= fHoverList.getSelectionIndex();
 145                                 boolean state= fEnableField.getSelection();
 146                                 fModifierEditor.setEnabled(state);
 147                                 fHoverConfigs[i].fIsEnabled= state;
 148                                 handleModifierModified();
 149                         }
 150                         public void widgetDefaultSelected(SelectionEvent e) {
 151                         }
 152                 });
 153
 154                 // Text field for modifier string
 155                 label= new Label(stylesComposite, SWT.LEFT);
 156                 label.setText(PreferencesMessages.getString("JavaEditorHoverConfigurationBlock.keyModifier")); //$NON-NLS-1$
 157                 fModifierEditor= new Text(stylesComposite, SWT.BORDER);
 158                 gd= new GridData(GridData.HORIZONTAL_ALIGN_FILL);
 159                 fModifierEditor.setLayoutData(gd);
 160
 161                 fModifierEditor.addKeyListener(new KeyListener() {
 162                         private boolean isModifierCandidate;
 163                         public void keyPressed(KeyEvent e) {
 164                                 isModifierCandidate= e.keyCode > 0 && e.character == 0 && e.stateMask == 0;
 165                         }
 166
 167                         public void keyReleased(KeyEvent e) {
 168                                 if (isModifierCandidate && e.stateMask > 0 && e.stateMask == e.stateMask && e.character == 0) {// && e.time -time < 1000) {
 169                                         String text= fModifierEditor.getText();
 170                                         Point selection= fModifierEditor.getSelection();
 171                                         int i= selection.x - 1;
 172                                         while (i > -1 && Character.isWhitespace(text.charAt(i))) {
 173                                                 i--;
 174                                         }
 175                                         boolean needsPrefixDelimiter= i > -1 && !String.valueOf(text.charAt(i)).equals(DELIMITER);
 176
 177                                         i= selection.y;
 178                                         while (i < text.length() && Character.isWhitespace(text.charAt(i))) {
 179                                                 i++;
 180                                         }
 181                                         boolean needsPostfixDelimiter= i < text.length() && !String.valueOf(text.charAt(i)).equals(DELIMITER);
 182
 183                                         String insertString;
 184
 185                                         if (needsPrefixDelimiter && needsPostfixDelimiter)
 186                                                 insertString= PreferencesMessages.getFormattedString("JavaEditorHoverConfigurationBlock.insertDelimiterAndModifierAndDelimiter", new String[] {Action.findModifierString(e.stateMask)}); //$NON-NLS-1$
 187                                         else if (needsPrefixDelimiter)
 188                                                 insertString= PreferencesMessages.getFormattedString("JavaEditorHoverConfigurationBlock.insertDelimiterAndModifier", new String[] {Action.findModifierString(e.stateMask)}); //$NON-NLS-1$
 189                                         else if (needsPostfixDelimiter)
 190                                                 insertString= PreferencesMessages.getFormattedString("JavaEditorHoverConfigurationBlock.insertModifierAndDelimiter", new String[] {Action.findModifierString(e.stateMask)}); //$NON-NLS-1$
 191                                         else
 192                                                 insertString= Action.findModifierString(e.stateMask);
 193
 194                                         if (insertString != null)
 195                                                 fModifierEditor.insert(insertString);
 196                                 }
 197                         }
 198                 });
 199
 200                 fModifierEditor.addModifyListener(new ModifyListener() {
 201                         public void modifyText(ModifyEvent e) {
 202                                 handleModifierModified();
 203                         }
 204                 });
 205
 206                 // Description
 207                 Label descriptionLabel= new Label(stylesComposite, SWT.LEFT);
 208                 descriptionLabel.setText(PreferencesMessages.getString("JavaEditorHoverConfigurationBlock.description")); //$NON-NLS-1$
 209                 gd= new GridData(GridData.VERTICAL_ALIGN_BEGINNING);
 210                 gd.horizontalSpan= 2;
 211                 descriptionLabel.setLayoutData(gd);
 212                 fDescription= new Text(stylesComposite, SWT.LEFT | SWT.WRAP | SWT.MULTI | SWT.READ_ONLY | SWT.BORDER);
 213                 gd= new GridData(GridData.FILL_BOTH);
 214                 gd.horizontalSpan= 2;
 215                 fDescription.setLayoutData(gd);
 216
 217                 // Vertical filler
 218                 Label filler= new Label(hoverComposite, SWT.LEFT);
 219                 gd= new GridData(GridData.BEGINNING | GridData.VERTICAL_ALIGN_FILL);
 220                 gd.heightHint= pixelConverter.convertHeightInCharsToPixels(1) / 3;
 221                 filler.setLayoutData(gd);
 222
 223                 // Affordance checkbox
 224 //              fShowHoverAffordanceCheckbox= new Button(hoverComposite, SWT.CHECK);
 225 //              fShowHoverAffordanceCheckbox.setText(PreferencesMessages.getString("JavaEditorHoverConfigurationBlock.showAffordance")); //$NON-NLS-1$
 226 //              gd= new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING);
 227 //              gd.horizontalIndent= 0;
 228 //              gd.horizontalSpan= 2;
 229 //              fShowHoverAffordanceCheckbox.setLayoutData(gd);
 230
 231                 initialize();
 232
 233                 Dialog.applyDialogFont(hoverComposite);
 234                 return hoverComposite;
 235         }
 236
 237         private JavaEditorTextHoverDescriptor[] getContributedHovers() {
 238                 return PHPeclipsePlugin.getDefault().getJavaEditorTextHoverDescriptors();
 239         }
 240
 241         void initialize() {
 242                 JavaEditorTextHoverDescriptor[] hoverDescs= getContributedHovers();
 243                 fHoverConfigs= new HoverConfig[hoverDescs.length];
 244                 for (int i= 0; i < hoverDescs.length; i++) {
 245                         fHoverConfigs[i]= new HoverConfig(hoverDescs[i].getModifierString(), hoverDescs[i].getStateMask(), hoverDescs[i].isEnabled());
 246                         fHoverList.add(hoverDescs[i].getLabel());
 247                 }
 248                 initializeFields();
 249         }
 250
 251         void initializeFields() {
 252                 fHoverList.getDisplay().asyncExec(new Runnable() {
 253                         public void run() {
 254                                 if (fHoverList != null && !fHoverList.isDisposed()) {
 255                                         fHoverList.select(0);
 256                                         handleHoverListSelection();
 257                                 }
 258                         }
 259                 });
 260 //              fShowHoverAffordanceCheckbox.setSelection(fStore.getBoolean(PreferenceConstants.EDITOR_SHOW_TEXT_HOVER_AFFORDANCE));
 261         }
 262
 263         void performOk() {
 264                 StringBuffer buf= new StringBuffer();
 265                 StringBuffer maskBuf= new StringBuffer();
 266                 for (int i= 0; i < fHoverConfigs.length; i++) {
 267                         buf.append(getContributedHovers()[i].getId());
 268                         buf.append(JavaEditorTextHoverDescriptor.VALUE_SEPARATOR);
 269                         if (!fHoverConfigs[i].fIsEnabled)
 270                                 buf.append(JavaEditorTextHoverDescriptor.DISABLED_TAG);
 271                         String modifier= fHoverConfigs[i].fModifierString;
 272                         if (modifier == null || modifier.length() == 0)
 273                                 modifier= JavaEditorTextHoverDescriptor.NO_MODIFIER;
 274                         buf.append(modifier);
 275                         buf.append(JavaEditorTextHoverDescriptor.VALUE_SEPARATOR);
 276
 277                         maskBuf.append(getContributedHovers()[i].getId());
 278                         maskBuf.append(JavaEditorTextHoverDescriptor.VALUE_SEPARATOR);
 279                         maskBuf.append(fHoverConfigs[i].fStateMask);
 280                         maskBuf.append(JavaEditorTextHoverDescriptor.VALUE_SEPARATOR);
 281                 }
 282                 fStore.setValue(PreferenceConstants.EDITOR_TEXT_HOVER_MODIFIERS, buf.toString());
 283                 fStore.setValue(PreferenceConstants.EDITOR_TEXT_HOVER_MODIFIER_MASKS, maskBuf.toString());
 284
 285 //              fStore.setValue(PreferenceConstants.EDITOR_SHOW_TEXT_HOVER_AFFORDANCE, fShowHoverAffordanceCheckbox.getSelection());
 286
 287                 PHPeclipsePlugin.getDefault().resetJavaEditorTextHoverDescriptors();
 288         }
 289
 290         void performDefaults() {
 291                 restoreFromPreferences();
 292                 initializeFields();
 293         }
 294
 295         private void restoreFromPreferences() {
 296
 297 //              fShowHoverAffordanceCheckbox.setSelection(fStore.getBoolean(PreferenceConstants.EDITOR_SHOW_TEXT_HOVER_AFFORDANCE));
 298
 299                 String compiledTextHoverModifiers= fStore.getString(PreferenceConstants.EDITOR_TEXT_HOVER_MODIFIERS);
 300
 301                 StringTokenizer tokenizer= new StringTokenizer(compiledTextHoverModifiers, JavaEditorTextHoverDescriptor.VALUE_SEPARATOR);
 302                 HashMap idToModifier= new HashMap(tokenizer.countTokens() / 2);
 303
 304                 while (tokenizer.hasMoreTokens()) {
 305                         String id= tokenizer.nextToken();
 306                         if (tokenizer.hasMoreTokens())
 307                                 idToModifier.put(id, tokenizer.nextToken());
 308                 }
 309
 310                 String compiledTextHoverModifierMasks= PHPeclipsePlugin.getDefault().getPreferenceStore().getString(PreferenceConstants.EDITOR_TEXT_HOVER_MODIFIER_MASKS);
 311
 312                 tokenizer= new StringTokenizer(compiledTextHoverModifierMasks, JavaEditorTextHoverDescriptor.VALUE_SEPARATOR);
 313                 HashMap idToModifierMask= new HashMap(tokenizer.countTokens() / 2);
 314
 315                 while (tokenizer.hasMoreTokens()) {
 316                         String id= tokenizer.nextToken();
 317                         if (tokenizer.hasMoreTokens())
 318                                 idToModifierMask.put(id, tokenizer.nextToken());
 319                 }
 320
 321                 for (int i= 0; i < fHoverConfigs.length; i++) {
 322                         String modifierString= (String)idToModifier.get(getContributedHovers()[i].getId());
 323                         boolean enabled= true;
 324                         if (modifierString == null)
 325                                 modifierString= JavaEditorTextHoverDescriptor.DISABLED_TAG;
 326
 327                         if (modifierString.startsWith(JavaEditorTextHoverDescriptor.DISABLED_TAG)) {
 328                                 enabled= false;
 329                                 modifierString= modifierString.substring(1);
 330                         }
 331
 332                         if (modifierString.equals(JavaEditorTextHoverDescriptor.NO_MODIFIER))
 333                                 modifierString= ""; //$NON-NLS-1$
 334
 335                         fHoverConfigs[i].fModifierString= modifierString;
 336                         fHoverConfigs[i].fIsEnabled= enabled;
 337                         fHoverConfigs[i].fStateMask= JavaEditorTextHoverDescriptor.computeStateMask(modifierString);
 338
 339                         if (fHoverConfigs[i].fStateMask == -1) {
 340                                 try {
 341                                         fHoverConfigs[i].fStateMask= Integer.parseInt((String)idToModifierMask.get(getContributedHovers()[i].getId()));
 342                                 } catch (NumberFormatException ex) {
 343                                         fHoverConfigs[i].fStateMask= -1;
 344                                 }
 345                         }
 346                 }
 347         }
 348
 349         private void handleModifierModified() {
 350                 int i= fHoverList.getSelectionIndex();
 351                 String modifiers= fModifierEditor.getText();
 352                 fHoverConfigs[i].fModifierString= modifiers;
 353                 fHoverConfigs[i].fStateMask= JavaEditorTextHoverDescriptor.computeStateMask(modifiers);
 354                 if (fHoverConfigs[i].fIsEnabled && fHoverConfigs[i].fStateMask == -1)
 355                         fStatus= new StatusInfo(IStatus.ERROR, PreferencesMessages.getFormattedString("JavaEditorHoverConfigurationBlock.modifierIsNotValid", fHoverConfigs[i].fModifierString)); //$NON-NLS-1$
 356                 else
 357                         fStatus= new StatusInfo();
 358                 updateStatus();
 359         }
 360
 361         private void handleHoverListSelection() {
 362                 int i= fHoverList.getSelectionIndex();
 363                 boolean enabled= fHoverConfigs[i].fIsEnabled;
 364                 fEnableField.setSelection(enabled);
 365                 fModifierEditor.setEnabled(enabled);
 366                 fModifierEditor.setText(fHoverConfigs[i].fModifierString);
 367                 String description= getContributedHovers()[i].getDescription();
 368                 if (description == null)
 369                         description= ""; //$NON-NLS-1$
 370                 fDescription.setText(description);
 371         }
 372
 373         IStatus getStatus() {
 374                 if (fStatus == null)
 375                         fStatus= new StatusInfo();
 376                 return fStatus;
 377         }
 378
 379         private void updateStatus() {
 380                 int i= 0;
 381                 HashMap stateMasks= new HashMap(fHoverConfigs.length);
 382                 while (fStatus.isOK() && i < fHoverConfigs.length) {
 383                         if (fHoverConfigs[i].fIsEnabled) {
 384                                 String label= getContributedHovers()[i].getLabel();
 385                                 Integer stateMask= new Integer(fHoverConfigs[i].fStateMask);
 386                                 if (fHoverConfigs[i].fStateMask == -1)
 387                                         fStatus= new StatusInfo(IStatus.ERROR, PreferencesMessages.getFormattedString("JavaEditorHoverConfigurationBlock.modifierIsNotValidForHover", new String[] {fHoverConfigs[i].fModifierString, label})); //$NON-NLS-1$
 388                                 else if (stateMasks.containsKey(stateMask))
 389                                         fStatus= new StatusInfo(IStatus.ERROR, PreferencesMessages.getFormattedString("JavaEditorHoverConfigurationBlock.duplicateModifier", new String[] {label, (String)stateMasks.get(stateMask)})); //$NON-NLS-1$
 390                                 else
 391                                         stateMasks.put(stateMask, label);
 392                         }
 393                         i++;
 394                 }
 395
 396                 if (fStatus.isOK())
 397                         fMainPreferencePage.updateStatus(fStatus);
 398                 else {
 399                         fMainPreferencePage.setValid(false);
 400                         StatusUtil.applyToStatusLine(fMainPreferencePage, fStatus);
 401                 }
 402         }
 403 }