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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.ui.WebUI;
  23 //import net.sourceforge.phpeclipse.PHPeclipsePlugin;
  24
  25 import org.eclipse.core.runtime.IStatus;
  26 import org.eclipse.jface.action.Action;
  27 import org.eclipse.jface.dialogs.Dialog;
  28 import org.eclipse.jface.preference.IPreferenceStore;
  29 import org.eclipse.jface.text.Assert;
  30 import org.eclipse.swt.SWT;
  31 import org.eclipse.swt.events.KeyEvent;
  32 import org.eclipse.swt.events.KeyListener;
  33 import org.eclipse.swt.events.ModifyEvent;
  34 import org.eclipse.swt.events.ModifyListener;
  35 import org.eclipse.swt.events.SelectionEvent;
  36 import org.eclipse.swt.events.SelectionListener;
  37 import org.eclipse.swt.graphics.Point;
  38 import org.eclipse.swt.layout.GridData;
  39 import org.eclipse.swt.layout.GridLayout;
  40 import org.eclipse.swt.widgets.Button;
  41 import org.eclipse.swt.widgets.Composite;
  42 import org.eclipse.swt.widgets.Control;
  43 import org.eclipse.swt.widgets.Label;
  44 import org.eclipse.swt.widgets.List;
  45 import org.eclipse.swt.widgets.Text;
  46
  47 /**
  48  * Configures Java Editor hover preferences.
  49  *
  50  * @since 2.1
  51  */
  52 class JavaEditorHoverConfigurationBlock {
  53
  54         private static final String DELIMITER = PreferencesMessages
  55                         .getString("JavaEditorHoverConfigurationBlock.delimiter"); //$NON-NLS-1$
  56
  57         // Data structure to hold the values which are edited by the user
  58         private static class HoverConfig {
  59
  60                 private String fModifierString;
  61
  62                 private boolean fIsEnabled;
  63
  64                 private int fStateMask;
  65
  66                 private HoverConfig(String modifier, int stateMask, boolean enabled) {
  67                         fModifierString = modifier;
  68                         fIsEnabled = enabled;
  69                         fStateMask = stateMask;
  70                 }
  71         }
  72
  73         private IPreferenceStore fStore;
  74
  75         private HoverConfig[] fHoverConfigs;
  76
  77         private Text fModifierEditor;
  78
  79         private Button fEnableField;
  80
  81         private List fHoverList;
  82
  83         private Text fDescription;
  84
  85         private Button fShowHoverAffordanceCheckbox;
  86
  87         private JavaEditorPreferencePage fMainPreferencePage;
  88
  89         private StatusInfo fStatus;
  90
  91         public JavaEditorHoverConfigurationBlock(
  92                         JavaEditorPreferencePage mainPreferencePage, IPreferenceStore store) {
  93                 Assert.isNotNull(mainPreferencePage);
  94                 Assert.isNotNull(store);
  95                 fMainPreferencePage = mainPreferencePage;
  96                 fStore = store;
  97         }
  98
  99         /**
 100          * Creates page for hover preferences.
 101          */
 102         public Control createControl(Composite parent) {
 103
 104                 PixelConverter pixelConverter = new PixelConverter(parent);
 105
 106                 Composite hoverComposite = new Composite(parent, SWT.NULL);
 107                 GridLayout layout = new GridLayout();
 108                 layout.numColumns = 2;
 109                 hoverComposite.setLayout(layout);
 110                 GridData gd = new GridData(GridData.GRAB_HORIZONTAL
 111                                 | GridData.VERTICAL_ALIGN_FILL);
 112                 hoverComposite.setLayoutData(gd);
 113
 114                 Label label = new Label(hoverComposite, SWT.NONE);
 115                 label
 116                                 .setText(PreferencesMessages
 117                                                 .getString("JavaEditorHoverConfigurationBlock.hoverPreferences")); //$NON-NLS-1$
 118                 gd = new GridData(GridData.FILL_HORIZONTAL);
 119                 gd.horizontalAlignment = GridData.BEGINNING;
 120                 gd.horizontalSpan = 2;
 121                 label.setLayoutData(gd);
 122                 gd = new GridData(GridData.GRAB_HORIZONTAL
 123                                 | GridData.VERTICAL_ALIGN_FILL);
 124
 125                 // Hover list
 126                 fHoverList = new List(hoverComposite, SWT.SINGLE | SWT.V_SCROLL
 127                                 | SWT.BORDER);
 128                 gd = new GridData(GridData.VERTICAL_ALIGN_BEGINNING
 129                                 | GridData.FILL_HORIZONTAL);
 130                 int listHeight = 10 * fHoverList.getItemHeight();
 131                 gd.heightHint = listHeight;
 132                 fHoverList.setLayoutData(gd);
 133                 fHoverList.addSelectionListener(new SelectionListener() {
 134                         public void widgetSelected(SelectionEvent e) {
 135                                 handleHoverListSelection();
 136                         }
 137
 138                         public void widgetDefaultSelected(SelectionEvent e) {
 139                         }
 140                 });
 141
 142                 Composite stylesComposite = new Composite(hoverComposite, SWT.NONE);
 143                 layout = new GridLayout();
 144                 layout.marginHeight = 0;
 145                 layout.marginWidth = 0;
 146                 layout.numColumns = 2;
 147                 stylesComposite.setLayout(layout);
 148                 gd = new GridData(GridData.FILL_HORIZONTAL);
 149                 gd.heightHint = listHeight + (2 * fHoverList.getBorderWidth());
 150                 stylesComposite.setLayoutData(gd);
 151
 152                 // Enabled checkbox
 153                 fEnableField = new Button(stylesComposite, SWT.CHECK);
 154                 fEnableField.setText(PreferencesMessages
 155                                 .getString("JavaEditorHoverConfigurationBlock.enabled")); //$NON-NLS-1$
 156                 gd = new GridData(GridData.FILL_HORIZONTAL);
 157                 gd.horizontalAlignment = GridData.BEGINNING;
 158                 gd.horizontalSpan = 2;
 159                 fEnableField.setLayoutData(gd);
 160                 fEnableField.addSelectionListener(new SelectionListener() {
 161                         public void widgetSelected(SelectionEvent e) {
 162                                 int i = fHoverList.getSelectionIndex();
 163                                 boolean state = fEnableField.getSelection();
 164                                 fModifierEditor.setEnabled(state);
 165                                 fHoverConfigs[i].fIsEnabled = state;
 166                                 handleModifierModified();
 167                         }
 168
 169                         public void widgetDefaultSelected(SelectionEvent e) {
 170                         }
 171                 });
 172
 173                 // Text field for modifier string
 174                 label = new Label(stylesComposite, SWT.LEFT);
 175                 label.setText(PreferencesMessages
 176                                 .getString("JavaEditorHoverConfigurationBlock.keyModifier")); //$NON-NLS-1$
 177                 fModifierEditor = new Text(stylesComposite, SWT.BORDER);
 178                 gd = new GridData(GridData.HORIZONTAL_ALIGN_FILL);
 179                 fModifierEditor.setLayoutData(gd);
 180
 181                 fModifierEditor.addKeyListener(new KeyListener() {
 182                         private boolean isModifierCandidate;
 183
 184                         public void keyPressed(KeyEvent e) {
 185                                 isModifierCandidate = e.keyCode > 0 && e.character == 0
 186                                                 && e.stateMask == 0;
 187                         }
 188
 189                         public void keyReleased(KeyEvent e) {
 190                                 if (isModifierCandidate && e.stateMask > 0
 191                                                 && e.stateMask == e.stateMask && e.character == 0) {// &&
 192                                                                                                                                                         // e.time
 193                                                                                                                                                         // -time
 194                                                                                                                                                         // <
 195                                                                                                                                                         // 1000)
 196                                                                                                                                                         // {
 197                                         String text = fModifierEditor.getText();
 198                                         Point selection = fModifierEditor.getSelection();
 199                                         int i = selection.x - 1;
 200                                         while (i > -1 && Character.isWhitespace(text.charAt(i))) {
 201                                                 i--;
 202                                         }
 203                                         boolean needsPrefixDelimiter = i > -1
 204                                                         && !String.valueOf(text.charAt(i))
 205                                                                         .equals(DELIMITER);
 206
 207                                         i = selection.y;
 208                                         while (i < text.length()
 209                                                         && Character.isWhitespace(text.charAt(i))) {
 210                                                 i++;
 211                                         }
 212                                         boolean needsPostfixDelimiter = i < text.length()
 213                                                         && !String.valueOf(text.charAt(i))
 214                                                                         .equals(DELIMITER);
 215
 216                                         String insertString;
 217
 218                                         if (needsPrefixDelimiter && needsPostfixDelimiter)
 219                                                 insertString = PreferencesMessages
 220                                                                 .getFormattedString(
 221                                                                                 "JavaEditorHoverConfigurationBlock.insertDelimiterAndModifierAndDelimiter", new String[] { Action.findModifierString(e.stateMask) }); //$NON-NLS-1$
 222                                         else if (needsPrefixDelimiter)
 223                                                 insertString = PreferencesMessages
 224                                                                 .getFormattedString(
 225                                                                                 "JavaEditorHoverConfigurationBlock.insertDelimiterAndModifier", new String[] { Action.findModifierString(e.stateMask) }); //$NON-NLS-1$
 226                                         else if (needsPostfixDelimiter)
 227                                                 insertString = PreferencesMessages
 228                                                                 .getFormattedString(
 229                                                                                 "JavaEditorHoverConfigurationBlock.insertModifierAndDelimiter", new String[] { Action.findModifierString(e.stateMask) }); //$NON-NLS-1$
 230                                         else
 231                                                 insertString = Action.findModifierString(e.stateMask);
 232
 233                                         if (insertString != null)
 234                                                 fModifierEditor.insert(insertString);
 235                                 }
 236                         }
 237                 });
 238
 239                 fModifierEditor.addModifyListener(new ModifyListener() {
 240                         public void modifyText(ModifyEvent e) {
 241                                 handleModifierModified();
 242                         }
 243                 });
 244
 245                 // Description
 246                 Label descriptionLabel = new Label(stylesComposite, SWT.LEFT);
 247                 descriptionLabel.setText(PreferencesMessages
 248                                 .getString("JavaEditorHoverConfigurationBlock.description")); //$NON-NLS-1$
 249                 gd = new GridData(GridData.VERTICAL_ALIGN_BEGINNING);
 250                 gd.horizontalSpan = 2;
 251                 descriptionLabel.setLayoutData(gd);
 252                 fDescription = new Text(stylesComposite, SWT.LEFT | SWT.WRAP
 253                                 | SWT.MULTI | SWT.READ_ONLY | SWT.BORDER);
 254                 gd = new GridData(GridData.FILL_BOTH);
 255                 gd.horizontalSpan = 2;
 256                 fDescription.setLayoutData(gd);
 257
 258                 // Vertical filler
 259                 Label filler = new Label(hoverComposite, SWT.LEFT);
 260                 gd = new GridData(GridData.BEGINNING | GridData.VERTICAL_ALIGN_FILL);
 261                 gd.heightHint = pixelConverter.convertHeightInCharsToPixels(1) / 3;
 262                 filler.setLayoutData(gd);
 263
 264                 // Affordance checkbox
 265                 fShowHoverAffordanceCheckbox = new Button(hoverComposite, SWT.CHECK);
 266                 fShowHoverAffordanceCheckbox.setText(PreferencesMessages
 267                                 .getString("JavaEditorHoverConfigurationBlock.showAffordance")); //$NON-NLS-1$
 268                 gd = new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING);
 269                 gd.horizontalIndent = 0;
 270                 gd.horizontalSpan = 2;
 271                 fShowHoverAffordanceCheckbox.setLayoutData(gd);
 272
 273                 initialize();
 274
 275                 Dialog.applyDialogFont(hoverComposite);
 276                 return hoverComposite;
 277         }
 278
 279         private JavaEditorTextHoverDescriptor[] getContributedHovers() {
 280                 return WebUI.getDefault()
 281                                 .getJavaEditorTextHoverDescriptors();
 282         }
 283
 284         void initialize() {
 285                 JavaEditorTextHoverDescriptor[] hoverDescs = getContributedHovers();
 286                 fHoverConfigs = new HoverConfig[hoverDescs.length];
 287                 for (int i = 0; i < hoverDescs.length; i++) {
 288                         fHoverConfigs[i] = new HoverConfig(hoverDescs[i]
 289                                         .getModifierString(), hoverDescs[i].getStateMask(),
 290                                         hoverDescs[i].isEnabled());
 291                         fHoverList.add(hoverDescs[i].getLabel());
 292                 }
 293                 initializeFields();
 294         }
 295
 296         void initializeFields() {
 297                 fHoverList.getDisplay().asyncExec(new Runnable() {
 298                         public void run() {
 299                                 if (fHoverList != null && !fHoverList.isDisposed()) {
 300                                         fHoverList.select(0);
 301                                         handleHoverListSelection();
 302                                 }
 303                         }
 304                 });
 305                 fShowHoverAffordanceCheckbox
 306                                 .setSelection(fStore
 307                                                 .getBoolean(PreferenceConstants.EDITOR_SHOW_TEXT_HOVER_AFFORDANCE));
 308         }
 309
 310         void performOk() {
 311                 StringBuffer buf = new StringBuffer();
 312                 StringBuffer maskBuf = new StringBuffer();
 313                 for (int i = 0; i < fHoverConfigs.length; i++) {
 314                         buf.append(getContributedHovers()[i].getId());
 315                         buf.append(JavaEditorTextHoverDescriptor.VALUE_SEPARATOR);
 316                         if (!fHoverConfigs[i].fIsEnabled)
 317                                 buf.append(JavaEditorTextHoverDescriptor.DISABLED_TAG);
 318                         String modifier = fHoverConfigs[i].fModifierString;
 319                         if (modifier == null || modifier.length() == 0)
 320                                 modifier = JavaEditorTextHoverDescriptor.NO_MODIFIER;
 321                         buf.append(modifier);
 322                         buf.append(JavaEditorTextHoverDescriptor.VALUE_SEPARATOR);
 323
 324                         maskBuf.append(getContributedHovers()[i].getId());
 325                         maskBuf.append(JavaEditorTextHoverDescriptor.VALUE_SEPARATOR);
 326                         maskBuf.append(fHoverConfigs[i].fStateMask);
 327                         maskBuf.append(JavaEditorTextHoverDescriptor.VALUE_SEPARATOR);
 328                 }
 329                 fStore.setValue(PreferenceConstants.EDITOR_TEXT_HOVER_MODIFIERS, buf
 330                                 .toString());
 331                 fStore.setValue(PreferenceConstants.EDITOR_TEXT_HOVER_MODIFIER_MASKS,
 332                                 maskBuf.toString());
 333
 334                 fStore.setValue(PreferenceConstants.EDITOR_SHOW_TEXT_HOVER_AFFORDANCE,
 335                                 fShowHoverAffordanceCheckbox.getSelection());
 336
 337                 WebUI.getDefault().resetJavaEditorTextHoverDescriptors();
 338         }
 339
 340         void performDefaults() {
 341                 restoreFromPreferences();
 342                 initializeFields();
 343         }
 344
 345         private void restoreFromPreferences() {
 346
 347                 fShowHoverAffordanceCheckbox
 348                                 .setSelection(fStore
 349                                                 .getBoolean(PreferenceConstants.EDITOR_SHOW_TEXT_HOVER_AFFORDANCE));
 350
 351                 String compiledTextHoverModifiers = fStore
 352                                 .getString(PreferenceConstants.EDITOR_TEXT_HOVER_MODIFIERS);
 353
 354                 StringTokenizer tokenizer = new StringTokenizer(
 355                                 compiledTextHoverModifiers,
 356                                 JavaEditorTextHoverDescriptor.VALUE_SEPARATOR);
 357                 HashMap idToModifier = new HashMap(tokenizer.countTokens() / 2);
 358
 359                 while (tokenizer.hasMoreTokens()) {
 360                         String id = tokenizer.nextToken();
 361                         if (tokenizer.hasMoreTokens())
 362                                 idToModifier.put(id, tokenizer.nextToken());
 363                 }
 364
 365                 String compiledTextHoverModifierMasks = WebUI.getDefault()
 366                                 .getPreferenceStore().getString(
 367                                                 PreferenceConstants.EDITOR_TEXT_HOVER_MODIFIER_MASKS);
 368
 369                 tokenizer = new StringTokenizer(compiledTextHoverModifierMasks,
 370                                 JavaEditorTextHoverDescriptor.VALUE_SEPARATOR);
 371                 HashMap idToModifierMask = new HashMap(tokenizer.countTokens() / 2);
 372
 373                 while (tokenizer.hasMoreTokens()) {
 374                         String id = tokenizer.nextToken();
 375                         if (tokenizer.hasMoreTokens())
 376                                 idToModifierMask.put(id, tokenizer.nextToken());
 377                 }
 378
 379                 for (int i = 0; i < fHoverConfigs.length; i++) {
 380                         String modifierString = (String) idToModifier
 381                                         .get(getContributedHovers()[i].getId());
 382                         boolean enabled = true;
 383                         if (modifierString == null)
 384                                 modifierString = JavaEditorTextHoverDescriptor.DISABLED_TAG;
 385
 386                         if (modifierString
 387                                         .startsWith(JavaEditorTextHoverDescriptor.DISABLED_TAG)) {
 388                                 enabled = false;
 389                                 modifierString = modifierString.substring(1);
 390                         }
 391
 392                         if (modifierString
 393                                         .equals(JavaEditorTextHoverDescriptor.NO_MODIFIER))
 394                                 modifierString = ""; //$NON-NLS-1$
 395
 396                         fHoverConfigs[i].fModifierString = modifierString;
 397                         fHoverConfigs[i].fIsEnabled = enabled;
 398                         fHoverConfigs[i].fStateMask = JavaEditorTextHoverDescriptor
 399                                         .computeStateMask(modifierString);
 400
 401                         if (fHoverConfigs[i].fStateMask == -1) {
 402                                 try {
 403                                         fHoverConfigs[i].fStateMask = Integer
 404                                                         .parseInt((String) idToModifierMask
 405                                                                         .get(getContributedHovers()[i].getId()));
 406                                 } catch (NumberFormatException ex) {
 407                                         fHoverConfigs[i].fStateMask = -1;
 408                                 }
 409                         }
 410                 }
 411         }
 412
 413         private void handleModifierModified() {
 414                 int i = fHoverList.getSelectionIndex();
 415                 String modifiers = fModifierEditor.getText();
 416                 fHoverConfigs[i].fModifierString = modifiers;
 417                 fHoverConfigs[i].fStateMask = JavaEditorTextHoverDescriptor
 418                                 .computeStateMask(modifiers);
 419                 if (fHoverConfigs[i].fIsEnabled && fHoverConfigs[i].fStateMask == -1)
 420                         fStatus = new StatusInfo(
 421                                         IStatus.ERROR,
 422                                         PreferencesMessages
 423                                                         .getFormattedString(
 424                                                                         "JavaEditorHoverConfigurationBlock.modifierIsNotValid", fHoverConfigs[i].fModifierString)); //$NON-NLS-1$
 425                 else
 426                         fStatus = new StatusInfo();
 427                 updateStatus();
 428         }
 429
 430         private void handleHoverListSelection() {
 431                 int i = fHoverList.getSelectionIndex();
 432                 boolean enabled = fHoverConfigs[i].fIsEnabled;
 433                 fEnableField.setSelection(enabled);
 434                 fModifierEditor.setEnabled(enabled);
 435                 fModifierEditor.setText(fHoverConfigs[i].fModifierString);
 436                 String description = getContributedHovers()[i].getDescription();
 437                 if (description == null)
 438                         description = ""; //$NON-NLS-1$
 439                 fDescription.setText(description);
 440         }
 441
 442         IStatus getStatus() {
 443                 if (fStatus == null)
 444                         fStatus = new StatusInfo();
 445                 return fStatus;
 446         }
 447
 448         private void updateStatus() {
 449                 int i = 0;
 450                 HashMap stateMasks = new HashMap(fHoverConfigs.length);
 451                 while (fStatus.isOK() && i < fHoverConfigs.length) {
 452                         if (fHoverConfigs[i].fIsEnabled) {
 453                                 String label = getContributedHovers()[i].getLabel();
 454                                 Integer stateMask = new Integer(fHoverConfigs[i].fStateMask);
 455                                 if (fHoverConfigs[i].fStateMask == -1)
 456                                         fStatus = new StatusInfo(
 457                                                         IStatus.ERROR,
 458                                                         PreferencesMessages
 459                                                                         .getFormattedString(
 460                                                                                         "JavaEditorHoverConfigurationBlock.modifierIsNotValidForHover", new String[] { fHoverConfigs[i].fModifierString, label })); //$NON-NLS-1$
 461                                 else if (stateMasks.containsKey(stateMask))
 462                                         fStatus = new StatusInfo(
 463                                                         IStatus.ERROR,
 464                                                         PreferencesMessages
 465                                                                         .getFormattedString(
 466                                                                                         "JavaEditorHoverConfigurationBlock.duplicateModifier", new String[] { label, (String) stateMasks.get(stateMask) })); //$NON-NLS-1$
 467                                 else
 468                                         stateMasks.put(stateMask, label);
 469                         }
 470                         i++;
 471                 }
 472
 473                 if (fStatus.isOK())
 474                         fMainPreferencePage.updateStatus(fStatus);
 475                 else {
 476                         fMainPreferencePage.setValid(false);
 477                         StatusUtil.applyToStatusLine(fMainPreferencePage, fStatus);
 478                 }
 479         }
 480 }