net.sourceforge.phpeclipse.ui/src/net/sourceforge/phpeclipse/phpeditor/php/PHPCompletionProcessor.java

   1 /**********************************************************************
   2  Copyright (c) 2000, 2002 IBM Corp. 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 implementation
  10  **********************************************************************/
  11 package net.sourceforge.phpeclipse.phpeditor.php;
  12
  13 import java.io.IOException;
  14 import java.util.ArrayList;
  15 import java.util.Arrays;
  16 import java.util.HashMap;
  17 import java.util.HashSet;
  18 import java.util.Iterator;
  19 import java.util.List;
  20 import java.util.Set;
  21 import java.util.SortedMap;
  22
  23 import net.sourceforge.phpdt.core.ICompilationUnit;
  24 import net.sourceforge.phpdt.core.IJavaElement;
  25 import net.sourceforge.phpdt.core.IMethod;
  26 import net.sourceforge.phpdt.core.IType;
  27 import net.sourceforge.phpdt.core.JavaCore;
  28 import net.sourceforge.phpdt.core.ToolFactory;
  29 import net.sourceforge.phpdt.core.compiler.ITerminalSymbols;
  30 import net.sourceforge.phpdt.core.compiler.InvalidInputException;
  31 import net.sourceforge.phpdt.internal.compiler.DefaultErrorHandlingPolicies;
  32 import net.sourceforge.phpdt.internal.compiler.ast.CompilationUnitDeclaration;
  33 import net.sourceforge.phpdt.internal.compiler.impl.CompilerOptions;
  34 import net.sourceforge.phpdt.internal.compiler.parser.Scanner;
  35 import net.sourceforge.phpdt.internal.compiler.parser.SyntaxError;
  36 import net.sourceforge.phpdt.internal.compiler.parser.UnitParser;
  37 import net.sourceforge.phpdt.internal.compiler.parser.VariableInfo;
  38 import net.sourceforge.phpdt.internal.compiler.problem.DefaultProblemFactory;
  39 import net.sourceforge.phpdt.internal.compiler.problem.ProblemReporter;
  40 import net.sourceforge.phpdt.internal.corext.template.php.JavaContext;
  41 import net.sourceforge.phpdt.internal.corext.template.php.JavaContextType;
  42 import net.sourceforge.phpdt.internal.ui.text.PHPCodeReader;
  43 import net.sourceforge.phpdt.internal.ui.text.java.IPHPCompletionProposal;
  44 import net.sourceforge.phpdt.internal.ui.text.java.JavaParameterListValidator;
  45 import net.sourceforge.phpdt.internal.ui.text.java.PHPCompletionProposalComparator;
  46 import net.sourceforge.phpdt.internal.ui.text.template.BuiltInEngine;
  47 import net.sourceforge.phpdt.internal.ui.text.template.DeclarationEngine;
  48 import net.sourceforge.phpdt.internal.ui.text.template.LocalVariableProposal;
  49 import net.sourceforge.phpdt.internal.ui.text.template.contentassist.TemplateEngine;
  50 import net.sourceforge.phpdt.ui.IWorkingCopyManager;
  51 //import net.sourceforge.phpeclipse.PHPeclipsePlugin;
  52 import net.sourceforge.phpeclipse.builder.IdentifierIndexManager;
  53 import net.sourceforge.phpeclipse.phpeditor.PHPEditor;
  54 import net.sourceforge.phpeclipse.phpeditor.PHPSyntaxRdr;
  55 import net.sourceforge.phpeclipse.ui.WebUI;
  56
  57 import org.eclipse.core.resources.IFile;
  58 import org.eclipse.core.resources.IProject;
  59 import org.eclipse.jface.text.BadLocationException;
  60 import org.eclipse.jface.text.IDocument;
  61 import org.eclipse.jface.text.IRegion;
  62 import org.eclipse.jface.text.ITextViewer;
  63 import org.eclipse.jface.text.Region;
  64 import org.eclipse.jface.text.contentassist.ICompletionProposal;
  65 import org.eclipse.jface.text.contentassist.IContentAssistProcessor;
  66 import org.eclipse.jface.text.contentassist.IContextInformation;
  67 import org.eclipse.jface.text.contentassist.IContextInformationExtension;
  68 import org.eclipse.jface.text.contentassist.IContextInformationValidator;
  69 import org.eclipse.jface.text.templates.TemplateContextType;
  70 import org.eclipse.swt.graphics.Image;
  71 import org.eclipse.swt.graphics.Point;
  72 import org.eclipse.ui.IEditorInput;
  73 import org.eclipse.ui.IEditorPart;
  74 import org.eclipse.ui.IFileEditorInput;
  75
  76 /**
  77  * Example PHP completion processor.
  78  */
  79 public class PHPCompletionProcessor implements IContentAssistProcessor {
  80         /**
  81          * Simple content assist tip closer. The tip is valid in a range of 5
  82          * characters around its popup location.
  83          */
  84         // protected static class Validator implements IContextInformationValidator,
  85         // IContextInformationPresenter {
  86         // protected int fInstallOffset;
  87         //
  88         // /*
  89         // * @see IContextInformationValidator#isContextInformationValid(int)
  90         // */
  91         // public boolean isContextInformationValid(int offset) {
  92         // return Math.abs(fInstallOffset - offset) < 5;
  93         // }
  94         //
  95         // /*
  96         // * @see IContextInformationValidator#install(IContextInformation,
  97         // ITextViewer, int)
  98         // */
  99         // public void install(IContextInformation info, ITextViewer viewer, int
 100         // offset) {
 101         // fInstallOffset = offset;
 102         // }
 103         //
 104         // /*
 105         // * @see
 106         // org.eclipse.jface.text.contentassist.IContextInformationPresenter#updatePresentation(int,
 107         // TextPresentation)
 108         // */
 109         // public boolean updatePresentation(int documentPosition, TextPresentation
 110         // presentation) {
 111         // return false;
 112         // }
 113         // };
 114         private static class ContextInformationWrapper implements
 115                         IContextInformation, IContextInformationExtension {
 116                 private final IContextInformation fContextInformation;
 117
 118                 private int fPosition;
 119
 120                 public ContextInformationWrapper(IContextInformation contextInformation) {
 121                         fContextInformation = contextInformation;
 122                 }
 123
 124                 /*
 125                  * @see IContextInformation#getContextDisplayString()
 126                  */
 127                 public String getContextDisplayString() {
 128                         return fContextInformation.getContextDisplayString();
 129                 }
 130
 131                 /*
 132                  * @see IContextInformation#getImage()
 133                  */
 134                 public Image getImage() {
 135                         return fContextInformation.getImage();
 136                 }
 137
 138                 /*
 139                  * @see IContextInformation#getInformationDisplayString()
 140                  */
 141                 public String getInformationDisplayString() {
 142                         return fContextInformation.getInformationDisplayString();
 143                 }
 144
 145                 /*
 146                  * @see IContextInformationExtension#getContextInformationPosition()
 147                  */
 148                 public int getContextInformationPosition() {
 149                         return fPosition;
 150                 }
 151
 152                 public void setContextInformationPosition(int position) {
 153                         fPosition = position;
 154                 }
 155         };
 156
 157         // private class TableName {
 158         // String fTableName;
 159         //
 160         // TableName() {
 161         // fTableName = null;
 162         // }
 163         //
 164         // /**
 165         // * @return Returns the tableName.
 166         // */
 167         // public String getTableName() {
 168         // if (fTableName == null) {
 169         // return "<!--no-table-->";
 170         // }
 171         // return fTableName;
 172         // }
 173         //
 174         // /**
 175         // * @param tableName
 176         // * The tableName to set.
 177         // */
 178         // public void setTableName(String tableName) {
 179         // fTableName = tableName;
 180         // }
 181         // }
 182
 183         private char[] fProposalAutoActivationSet;
 184
 185         protected IContextInformationValidator fValidator = null;
 186
 187         private TemplateEngine fTemplateEngine;
 188
 189         private PHPCompletionProposalComparator fComparator;
 190
 191         private IEditorPart fEditor;
 192
 193         protected IWorkingCopyManager fManager;
 194
 195         public PHPCompletionProcessor(IEditorPart editor) {
 196                 fEditor = editor;
 197                 fManager = WebUI.getDefault().getWorkingCopyManager();
 198                 TemplateContextType contextType = WebUI.getDefault()
 199                                 .getTemplateContextRegistry().getContextType("php"); //$NON-NLS-1$
 200                 if (contextType != null)
 201                         fTemplateEngine = new TemplateEngine(contextType);
 202                 fComparator = new PHPCompletionProposalComparator();
 203         }
 204
 205         /**
 206          * Tells this processor to order the proposals alphabetically.
 207          *
 208          * @param order
 209          *            <code>true</code> if proposals should be ordered.
 210          */
 211         public void orderProposalsAlphabetically(boolean order) {
 212                 fComparator.setOrderAlphabetically(order);
 213         }
 214
 215         /**
 216          * Sets this processor's set of characters triggering the activation of the
 217          * completion proposal computation.
 218          *
 219          * @param activationSet
 220          *            the activation set
 221          */
 222         public void setCompletionProposalAutoActivationCharacters(
 223                         char[] activationSet) {
 224                 fProposalAutoActivationSet = activationSet;
 225         }
 226
 227         /*
 228          * (non-Javadoc) Method declared on IContentAssistProcessor
 229          */
 230         public ICompletionProposal[] computeCompletionProposals(ITextViewer viewer,
 231                         int documentOffset) {
 232                 int contextInformationPosition = guessContextInformationPosition(
 233                                 viewer, documentOffset);
 234                 return internalComputeCompletionProposals(viewer, documentOffset,
 235                                 contextInformationPosition);
 236         }
 237
 238         private int getLastToken(List list, ITextViewer viewer,
 239                         int completionPosition, JavaContext context) {
 240                 // TableName tableName) {
 241                 IDocument document = viewer.getDocument();
 242                 int start = context.getStart();
 243                 // int end = context.getEnd();
 244                 String startText;
 245                 int lastSignificantToken = ITerminalSymbols.TokenNameEOF;
 246                 try {
 247                         // begin search 2 lines behind of this
 248                         int j = start;
 249                         if (j != 0) {
 250                                 char ch;
 251                                 while (j > 0) {
 252                                         ch = document.getChar(--j);
 253                                         if (ch == '\n') {
 254                                                 break;
 255                                         }
 256                                 }
 257                                 while (j > 0) {
 258                                         ch = document.getChar(--j);
 259                                         if (ch == '\n') {
 260                                                 break;
 261                                         }
 262                                 }
 263                         }
 264                         if (j != start) {
 265                                 // scan the line for the dereferencing operator '->'
 266                                 startText = document.get(j, start - j);
 267                                 if (Scanner.DEBUG) {
 268                                         System.out.println(startText);
 269                                 }
 270                                 int token = ITerminalSymbols.TokenNameEOF;
 271                                 // token = getLastSQLToken(startText);
 272                                 // tableName.setTableName(getLastSQLTableName(startText));
 273                                 Scanner scanner = ToolFactory
 274                                                 .createScanner(false, false, false);
 275                                 scanner.setSource(startText.toCharArray());
 276                                 scanner.setPHPMode(true);
 277                                 int beforeLastToken = ITerminalSymbols.TokenNameEOF;
 278                                 int lastToken = ITerminalSymbols.TokenNameEOF;
 279                                 char[] ident = null;
 280                                 try {
 281                                         token = scanner.getNextToken();
 282                                         lastToken = token;
 283                                         while (token != ITerminalSymbols.TokenNameERROR
 284                                                         && token != ITerminalSymbols.TokenNameEOF) {
 285                                                 beforeLastToken = lastToken;
 286                                                 if (token == ITerminalSymbols.TokenNameVariable) {
 287                                                         ident = scanner.getCurrentTokenSource();
 288                                                         if (ident.length == 5 && ident[0] == '$'
 289                                                                         && ident[1] == 't' && ident[2] == 'h'
 290                                                                         && ident[3] == 'i' && ident[4] == 's') {
 291                                                                 token = ITerminalSymbols.TokenNamethis_PHP_COMPLETION;
 292                                                         }
 293                                                 }
 294                                                 lastToken = token;
 295                                                 // System.out.println(scanner.toStringAction(lastToken));
 296                                                 token = scanner.getNextToken();
 297                                         }
 298                                 } catch (InvalidInputException e1) {
 299                                 } catch (SyntaxError e) {
 300                                 }
 301                                 switch (lastToken) {
 302                                 case ITerminalSymbols.TokenNameMINUS_GREATER:
 303                                         // dereferencing operator '->' found
 304                                         lastSignificantToken = ITerminalSymbols.TokenNameMINUS_GREATER;
 305                                         if (beforeLastToken == ITerminalSymbols.TokenNameVariable) {
 306                                                 lastSignificantToken = ITerminalSymbols.TokenNameVariable;
 307                                                 list.set(0, ident);
 308                                         } else if (beforeLastToken == ITerminalSymbols.TokenNamethis_PHP_COMPLETION) {
 309                                                 lastSignificantToken = ITerminalSymbols.TokenNamethis_PHP_COMPLETION;
 310                                                 list.set(0, ident);
 311                                         }
 312                                         break;
 313                                 case ITerminalSymbols.TokenNamenew:
 314                                         lastSignificantToken = ITerminalSymbols.TokenNamenew;
 315                                         break;
 316                                 }
 317                         }
 318                 } catch (BadLocationException e) {
 319                 }
 320                 return lastSignificantToken;
 321         }
 322
 323         String getSQLTableName(String sqlText, int start) {
 324                 int tableNameStart = -1;
 325                 int currentCharacterPosition = start + 1;
 326                 char ch;
 327                 try {
 328                         while (true) {
 329                                 ch = sqlText.charAt(currentCharacterPosition++);
 330                                 if (tableNameStart == -1 && Scanner.isPHPIdentifierStart(ch)) {
 331                                         tableNameStart = currentCharacterPosition - 1;
 332                                 } else {
 333                                         if (!Scanner.isPHPIdentifierPart(ch)) {
 334                                                 return sqlText.substring(tableNameStart,
 335                                                                 currentCharacterPosition - 1);
 336                                         }
 337                                 }
 338                         }
 339                 } catch (IndexOutOfBoundsException e) {
 340                         if (tableNameStart >= 0) {
 341                                 return sqlText.substring(tableNameStart,
 342                                                 currentCharacterPosition - 1);
 343                         }
 344                 }
 345                 return "";
 346         }
 347
 348         // private String getLastSQLTableName(String startText) {
 349         // // scan for sql identifiers
 350         // char ch = ' ';
 351         // int currentSQLPosition = startText.length();
 352         // int identEnd = -1;
 353         // String ident = null;
 354         // try {
 355         // while (true) {
 356         // ch = startText.charAt(--currentSQLPosition);
 357         // if (Scanner.isSQLIdentifierPart(ch)) {
 358         // // if (ch >= 'A' && ch <= 'Z') {
 359         // if (identEnd < 0) {
 360         // identEnd = currentSQLPosition + 1;
 361         // }
 362         // // } else if (ch >= 'a' && ch <= 'z') {
 363         // // if (identEnd < 0) {
 364         // // identEnd = currentSQLPosition + 1;
 365         // // }
 366         // } else if (identEnd >= 0) {
 367         // ident = startText.substring(currentSQLPosition + 1, identEnd);
 368         // // select -- from -- where --
 369         // // update -- set -- where --
 370         // // insert into -- ( -- ) values ( -- )
 371         // if (ident.length() >= 4 && ident.length() <= 6) {
 372         // ident = ident.toLowerCase();
 373         // switch (ident.length()) {
 374         // // case 3 :
 375         // // if (ident.equals("set")) {
 376         // // // System.out.println("set");
 377         // // token = ITerminalSymbols.TokenNameSQLset;
 378         // // return token;
 379         // // }
 380         // // break;
 381         // case 4:
 382         // if (ident.equals("from")) {
 383         // // System.out.println("from");
 384         // return getSQLTableName(startText, identEnd);
 385         // } else if (ident.equals("into")) {
 386         // // System.out.println("into");
 387         // return getSQLTableName(startText, identEnd);
 388         // }
 389         // break;
 390         // case 6:
 391         // if (ident.equals("update")) {
 392         // // System.out.println("update");
 393         // return getSQLTableName(startText, identEnd);
 394         // }
 395         // break;
 396         // }
 397         // }
 398         // identEnd = -1;
 399         // } else if (Character.isWhitespace(ch)) {
 400         // }
 401         // }
 402         // } catch (IndexOutOfBoundsException e) {
 403         // }
 404         // return "<!--no-table-->";
 405         // }
 406
 407         /**
 408          * Detect the last significant SQL token in the text before the completion
 409          *
 410          * @param startText
 411          */
 412         // private int getLastSQLToken(String startText) {
 413         // int token;
 414         // // scan for sql identifiers
 415         // char ch = ' ';
 416         // int currentSQLPosition = startText.length();
 417         // int identEnd = -1;
 418         // String ident = null;
 419         // try {
 420         // while (true) {
 421         // ch = startText.charAt(--currentSQLPosition);
 422         // if (ch >= 'A' && ch <= 'Z') {
 423         // if (identEnd < 0) {
 424         // identEnd = currentSQLPosition + 1;
 425         // }
 426         // } else if (ch >= 'a' && ch <= 'z') {
 427         // if (identEnd < 0) {
 428         // identEnd = currentSQLPosition + 1;
 429         // }
 430         // } else if (identEnd >= 0) {
 431         // ident = startText.substring(currentSQLPosition + 1, identEnd);
 432         // // select -- from -- where --
 433         // // update -- set -- where --
 434         // // insert into -- ( -- ) values ( -- )
 435         // if (ident.length() >= 3 && ident.length() <= 6) {
 436         // ident = ident.toLowerCase();
 437         // switch (ident.length()) {
 438         // case 3:
 439         // if (ident.equals("set")) {
 440         // // System.out.println("set");
 441         // token = ITerminalSymbols.TokenNameSQLset;
 442         // return token;
 443         // }
 444         // break;
 445         // case 4:
 446         // if (ident.equals("from")) {
 447         // // System.out.println("from");
 448         // token = ITerminalSymbols.TokenNameSQLfrom;
 449         // // getSQLTableName();
 450         // return token;
 451         // } else if (ident.equals("into")) {
 452         // // System.out.println("into");
 453         // token = ITerminalSymbols.TokenNameSQLinto;
 454         // return token;
 455         // }
 456         // break;
 457         // case 5:
 458         // if (ident.equals("where")) {
 459         // // System.out.println("where");
 460         // token = ITerminalSymbols.TokenNameSQLwhere;
 461         // return token;
 462         // }
 463         // break;
 464         // case 6:
 465         // if (ident.equals("select")) {
 466         // // System.out.println("select");
 467         // token = ITerminalSymbols.TokenNameSQLselect;
 468         // return token;
 469         // } else if (ident.equals("insert")) {
 470         // // System.out.println("insert");
 471         // token = ITerminalSymbols.TokenNameSQLinsert;
 472         // return token;
 473         // } else if (ident.equals("update")) {
 474         // // System.out.println("update");
 475         // token = ITerminalSymbols.TokenNameSQLupdate;
 476         // return token;
 477         // } else if (ident.equals("values")) {
 478         // // System.out.println("values");
 479         // token = ITerminalSymbols.TokenNameSQLvalues;
 480         // return token;
 481         // }
 482         // break;
 483         // }
 484         // }
 485         // identEnd = -1;
 486         // }
 487         // }
 488         // } catch (IndexOutOfBoundsException e) {
 489         // }
 490         // return ITerminalSymbols.TokenNameEOF;
 491         // }
 492         private ICompletionProposal[] internalComputeCompletionProposals(
 493                         ITextViewer viewer, int offset, int contextOffset) {
 494                 ICompilationUnit unit = fManager.getWorkingCopy(fEditor
 495                                 .getEditorInput());
 496                 IDocument document = viewer.getDocument();
 497                 IFile file = null;
 498                 IProject project = null;
 499                 if (offset > 0) {
 500                         PHPEditor editor = null;
 501                         if (fEditor != null && (fEditor instanceof PHPEditor)) {
 502                                 editor = (PHPEditor) fEditor;
 503                                 IEditorInput editorInput = editor.getEditorInput();
 504                                 if (editorInput instanceof IFileEditorInput) {
 505                                         file = ((IFileEditorInput) editorInput).getFile();
 506                                         project = file.getProject();
 507                                 } else {
 508                                         return new ICompletionProposal[0];
 509                                 }
 510                         }
 511                 }
 512
 513                 Point selection = viewer.getSelectedRange();
 514                 // remember selected text
 515                 String selectedText = null;
 516                 if (selection.y != 0) {
 517                         try {
 518                                 selectedText = document.get(selection.x, selection.y);
 519                         } catch (BadLocationException e) {
 520                         }
 521                 }
 522
 523                 if (offset > 2 && fProposalAutoActivationSet != null) {
 524                         // restrict auto activation for '>' character to '->' token
 525
 526                         try {
 527                                 char ch = document.getChar(offset - 1);
 528                                 if (ch == '>') {
 529                                         for (int i = 0; i < fProposalAutoActivationSet.length; i++) {
 530                                                 ch = fProposalAutoActivationSet[i];
 531                                                 if (ch == '>') { // auto activation enabled
 532                                                         ch = document.getChar(offset - 2);
 533                                                         if (ch != '-') {
 534                                                                 return new IPHPCompletionProposal[0];
 535                                                         }
 536                                                         break;
 537                                                 }
 538                                         }
 539                                 }
 540                         } catch (BadLocationException e) {
 541                                 e.printStackTrace();
 542                         }
 543                 }
 544
 545                 JavaContextType phpContextType = (JavaContextType) WebUI
 546                                 .getDefault().getTemplateContextRegistry()
 547                                 .getContextType("php"); //$NON-NLS-1$
 548                 JavaContext context = (JavaContext) phpContextType.createContext(
 549                                 document, offset, selection.y, unit);
 550                 context.setVariable("selection", selectedText); //$NON-NLS-1$
 551                 String prefix = context.getKey();
 552
 553                 HashMap methodVariables = null;
 554                 // HashMap typeVariables = null;
 555                 HashMap unitVariables = null;
 556                 ICompilationUnit compilationUnit = (ICompilationUnit) context
 557                                 .findEnclosingElement(IJavaElement.COMPILATION_UNIT);
 558                 // if (compilationUnit != null) {
 559                 // unitVariables = ((CompilationUnit) compilationUnit).variables;
 560                 // }
 561                 IType type = (IType) context.findEnclosingElement(IJavaElement.TYPE);
 562                 if (type != null) {
 563                         // typeVariables = ((SourceType) type).variables;
 564                 }
 565                 IMethod method = (IMethod) context
 566                                 .findEnclosingElement(IJavaElement.METHOD);
 567                 // if (method != null) {
 568                 // methodVariables = ((SourceMethod) method).variables;
 569                 // }
 570
 571                 boolean emptyPrefix = prefix == null || prefix.equals("");
 572                 IPHPCompletionProposal[] localVariableResults = new IPHPCompletionProposal[0];
 573
 574                 if (!emptyPrefix && prefix.length() >= 1 && prefix.charAt(0) == '$') {
 575                         // php Variable ?
 576                         String lowerCasePrefix = prefix.toLowerCase();
 577                         HashSet localVariables = new HashSet();
 578                         if (compilationUnit != null) {
 579                                 unitVariables = getUnitVariables(unitVariables, compilationUnit);
 580                                 getVariableProposals(localVariables, viewer, project, context,
 581                                                 unitVariables, lowerCasePrefix, 94);
 582                         }
 583                         if (method != null) {
 584                                 methodVariables = getMethodVariables(methodVariables, method);
 585                                 getVariableProposals(localVariables, viewer, project, context,
 586                                                 methodVariables, lowerCasePrefix, 99);
 587                         }
 588                         if (!localVariables.isEmpty()) {
 589                                 localVariableResults = (IPHPCompletionProposal[]) localVariables
 590                                                 .toArray(new IPHPCompletionProposal[localVariables
 591                                                                 .size()]);
 592                         }
 593                 }
 594
 595                 // TableName sqlTable = new TableName();
 596                 ArrayList list = new ArrayList();
 597                 list.add(null);
 598                 int lastSignificantToken = getLastToken(list, viewer, offset, context); // ,
 599                                                                                                                                                                 // sqlTable);
 600                 boolean useClassMembers = (lastSignificantToken == ITerminalSymbols.TokenNameMINUS_GREATER)
 601                                 || (lastSignificantToken == ITerminalSymbols.TokenNameVariable)
 602                                 || (lastSignificantToken == ITerminalSymbols.TokenNamenew)
 603                                 || (lastSignificantToken == ITerminalSymbols.TokenNamethis_PHP_COMPLETION);
 604
 605                 if (fTemplateEngine != null) {
 606                         IPHPCompletionProposal[] templateResults = new IPHPCompletionProposal[0];
 607                         ICompletionProposal[] results;
 608                         if (!emptyPrefix) {
 609                                 fTemplateEngine.reset();
 610                                 fTemplateEngine.complete(viewer, offset, unit);
 611                                 templateResults = fTemplateEngine.getResults();
 612                         }
 613                         // TODO delete this
 614                         IPHPCompletionProposal[] identifierResults = new IPHPCompletionProposal[0];
 615
 616                         // declarations stored in file project.index on project level
 617                         IPHPCompletionProposal[] declarationResults = new IPHPCompletionProposal[0];
 618                         if (project != null) {
 619                                 DeclarationEngine declarationEngine;
 620                                 JavaContextType contextType = (JavaContextType) WebUI
 621                                                 .getDefault().getTemplateContextRegistry()
 622                                                 .getContextType("php"); //$NON-NLS-1$
 623                                 if (contextType != null) {
 624                                         IdentifierIndexManager indexManager = WebUI
 625                                                         .getDefault().getIndexManager(project);
 626                                         SortedMap sortedMap;
 627                                         declarationEngine = new DeclarationEngine(project,
 628                                                         contextType, lastSignificantToken, file);
 629                                         if (lastSignificantToken == ITerminalSymbols.TokenNamethis_PHP_COMPLETION) {
 630                                                 // complete '$this->'
 631                                                 sortedMap = indexManager.getIdentifiers(file);
 632                                                 declarationEngine.completeObject(viewer, offset,
 633                                                                 sortedMap, unit);
 634                                         } else {
 635                                                 String typeRef = null;
 636                                                 char[] varName = (char[]) list.get(0);
 637                                                 if (varName != null) {
 638                                                         if (method != null) {
 639                                                                 methodVariables = getMethodVariables(
 640                                                                                 methodVariables, method);
 641                                                                 VariableInfo info = (VariableInfo) methodVariables
 642                                                                                 .get(new String(varName));
 643                                                                 if (info != null && info.typeIdentifier != null) {
 644                                                                         typeRef = new String(info.typeIdentifier);
 645                                                                 }
 646                                                         }
 647                                                 }
 648                                                 if (typeRef != null) {
 649                                                         // complete '$variable->' with type information
 650                                                         sortedMap = indexManager.getIdentifiers(typeRef);
 651                                                         declarationEngine.completeObject(viewer, offset,
 652                                                                         sortedMap, unit);
 653                                                 } else {
 654                                                         // complete '$variable->' without type information
 655                                                         sortedMap = indexManager.getIdentifierMap();
 656                                                         declarationEngine.complete(viewer, offset,
 657                                                                         sortedMap, unit);
 658                                                 }
 659                                         }
 660                                         declarationResults = declarationEngine.getResults();
 661                                 }
 662                         }
 663                         // built in function names from phpsyntax.xml
 664                         ArrayList syntaxbuffer = PHPSyntaxRdr.getSyntaxData();
 665                         IPHPCompletionProposal[] builtinResults = new IPHPCompletionProposal[0];
 666                         if ((!useClassMembers) && syntaxbuffer != null) {
 667                                 BuiltInEngine builtinEngine;
 668                                 JavaContextType contextType = (JavaContextType) WebUI
 669                                                 .getDefault().getTemplateContextRegistry()
 670                                                 .getContextType("php"); //$NON-NLS-1$
 671                                 if (contextType != null) {
 672                                         builtinEngine = new BuiltInEngine(contextType);
 673                                         builtinEngine.complete(viewer, offset, syntaxbuffer, unit);
 674                                         builtinResults = builtinEngine.getResults();
 675                                 }
 676                         }
 677                         // ICompletionProposal[] sqlResults = new ICompletionProposal[0];
 678                         // if (project != null) {
 679                         // sqlResults = getSQLProposals(viewer, project, context, prefix,
 680                         // sqlTable);
 681                         // }
 682                         // concatenate the result arrays
 683                         IPHPCompletionProposal[] total;
 684                         total = new IPHPCompletionProposal[localVariableResults.length
 685                                         + templateResults.length + identifierResults.length
 686                                         + builtinResults.length + declarationResults.length];// +
 687                         // sqlResults.length];
 688                         System.arraycopy(templateResults, 0, total, 0,
 689                                         templateResults.length);
 690                         System.arraycopy(identifierResults, 0, total,
 691                                         templateResults.length, identifierResults.length);
 692                         System.arraycopy(builtinResults, 0, total, templateResults.length
 693                                         + identifierResults.length, builtinResults.length);
 694                         System.arraycopy(declarationResults, 0, total,
 695                                         templateResults.length + identifierResults.length
 696                                                         + builtinResults.length, declarationResults.length);
 697                         // System.arraycopy(sqlResults, 0, total, templateResults.length +
 698                         // identifierResults.length + builtinResults.length
 699                         // + declarationResults.length, sqlResults.length);
 700                         // System.arraycopy(localVariableResults, 0, total,
 701                         // templateResults.length
 702                         // + identifierResults.length + builtinResults.length
 703                         // + declarationResults.length + sqlResults.length,
 704                         // localVariableResults.length);
 705                         System
 706                                         .arraycopy(localVariableResults, 0, total,
 707                                                         templateResults.length + identifierResults.length
 708                                                                         + builtinResults.length
 709                                                                         + declarationResults.length,
 710                                                         localVariableResults.length);
 711                         results = total;
 712                         // fNumberOfComputedResults = (results == null ? 0 :
 713                         // results.length);
 714                         /*
 715                          * Order here and not in result collector to make sure that the
 716                          * order applies to all proposals and not just those of the
 717                          * compilation unit.
 718                          */
 719                         return order(results);
 720                 }
 721                 return new IPHPCompletionProposal[0];
 722         }
 723
 724         /**
 725          * @param unitVariables
 726          * @param unit
 727          */
 728         private HashMap getUnitVariables(HashMap unitVariables,
 729                         ICompilationUnit unit) {
 730                 if (unitVariables == null) {
 731                         try {
 732                                 String unitText = unit.getSource();
 733                                 unitVariables = new HashMap();
 734
 735                                 ProblemReporter problemReporter = new ProblemReporter(
 736                                                 DefaultErrorHandlingPolicies.exitAfterAllProblems(),
 737                                                 new CompilerOptions(JavaCore.getOptions()),
 738                                                 new DefaultProblemFactory());
 739                                 UnitParser parser = new UnitParser(problemReporter);
 740                                 parser.compilationUnit = new CompilationUnitDeclaration(
 741                                                 problemReporter, null, unitText.length());
 742                                 parser.parse(unitText, unitVariables);
 743
 744                         } catch (Exception e) {
 745                                 // TODO Auto-generated catch block
 746                                 e.printStackTrace();
 747                                 WebUI.log(e);
 748                         }
 749                 }
 750                 return unitVariables;
 751         }
 752
 753         /**
 754          * @param methodVariables
 755          * @param method
 756          */
 757         private HashMap getMethodVariables(HashMap methodVariables, IMethod method) {
 758                 if (methodVariables == null) {
 759                         try {
 760                                 String methodText = method.getSource();
 761                                 methodVariables = new HashMap();
 762                                 ProblemReporter problemReporter = new ProblemReporter(
 763                                                 DefaultErrorHandlingPolicies.exitAfterAllProblems(),
 764                                                 new CompilerOptions(JavaCore.getOptions()),
 765                                                 new DefaultProblemFactory());
 766                                 UnitParser parser = new UnitParser(problemReporter);
 767                                 parser.compilationUnit = new CompilationUnitDeclaration(
 768                                                 problemReporter, null, methodText.length());
 769                                 parser.parseFunction(methodText, methodVariables);
 770                         } catch (Exception e) {
 771                                 // TODO Auto-generated catch block
 772                                 e.printStackTrace();
 773                                 WebUI.log(e);
 774                         }
 775                 }
 776                 return methodVariables;
 777         }
 778
 779         /**
 780          * @param viewer
 781          * @param project
 782          * @param context
 783          * @param prefix
 784          * @return
 785          */
 786         private void getVariableProposals(HashSet localVariables,
 787                         ITextViewer viewer, IProject project, JavaContext context,
 788                         HashMap variables, String prefix, int relevance) {
 789                 // try {
 790                 int start = context.getStart();
 791                 int end = context.getEnd();
 792                 IRegion region = new Region(start, end - start);
 793                 // IMethod method = (IMethod)
 794                 // context.findEnclosingElement(IJavaElement.METHOD);
 795                 // if (method != null && (method instanceof SourceMethod) &&
 796                 // ((SourceMethod)
 797                 // method).variables != null) {
 798                 // HashMap map = ((SourceMethod) method).variables;
 799                 Set set = variables.keySet();
 800                 Iterator iter = set.iterator();
 801                 String varName;
 802                 boolean matchesVarName;
 803                 while (iter.hasNext()) {
 804                         varName = (String) iter.next();
 805                         if (varName.length() >= prefix.length()) {
 806                                 matchesVarName = true;
 807                                 for (int i = 0; i < prefix.length(); i++) {
 808                                         if (prefix.charAt(i) != Character.toLowerCase(varName
 809                                                         .charAt(i))) {
 810                                                 matchesVarName = false;
 811                                                 break;
 812                                         }
 813                                 }
 814                                 if (matchesVarName) {
 815                                         LocalVariableProposal prop;
 816                                         // if (varName.length == prefix.length()) {
 817                                         // prop = new LocalVariableProposal(new String(varName),
 818                                         // region,
 819                                         // viewer, relevance-10);
 820                                         // } else {
 821                                         prop = new LocalVariableProposal(new String(varName),
 822                                                         region, viewer, relevance);
 823                                         // }
 824                                         localVariables.add(prop);
 825                                 }
 826                         }
 827                 }
 828                 // }
 829
 830                 // char[] varName;
 831                 // boolean matchesVarName;
 832                 // if (method != null) {
 833                 // ISourceRange range = method.getSourceRange();
 834                 // char[] source = method.getSource().toCharArray();
 835                 // Scanner scanner = new Scanner();
 836                 // scanner.setSource(source);
 837                 // scanner.phpMode = true;
 838                 // int token = Scanner.TokenNameWHITESPACE;
 839                 // while ((token = scanner.getNextToken()) != Scanner.TokenNameEOF) {
 840                 // if (token == Scanner.TokenNameVariable) {
 841                 // varName = scanner.getCurrentTokenSource();
 842                 // if (varName.length >= prefix.length()) {
 843                 // matchesVarName = true;
 844                 // for (int i = 0; i < prefix.length(); i++) {
 845                 // if (prefix.charAt(i) != varName[i]) {
 846                 // matchesVarName = false;
 847                 // break;
 848                 // }
 849                 // }
 850                 // if (matchesVarName) {
 851                 // LocalVariableProposal prop = new LocalVariableProposal(new
 852                 // String(varName), region, viewer);
 853                 // if (varName.length == prefix.length()) {
 854                 // prop.setRelevance(98);
 855                 // }
 856                 // localVariables.add(prop);
 857                 // }
 858                 // }
 859                 // }
 860                 // }
 861                 // }
 862                 // } catch (Throwable e) {
 863                 // // ignore - Syntax exceptions could occur, if there are syntax errors
 864                 // !
 865                 // }
 866         }
 867
 868         /**
 869          * @param viewer
 870          * @param project
 871          * @param context
 872          * @param prefix
 873          * @param sqlTable
 874          * @param sqlResults
 875          * @return
 876          */
 877         // private ICompletionProposal[] getSQLProposals(ITextViewer viewer,
 878         // IProject
 879         // project, DocumentTemplateContext context,
 880         // String prefix, TableName sqlTable) {
 881         // ICompletionProposal[] sqlResults = new ICompletionProposal[0];
 882         // // Get The Database bookmark from the Quantum SQL plugin:
 883         // // BookmarkCollection sqlBookMarks = BookmarkCollection.getInstance();
 884         // // if (sqlBookMarks != null) {
 885         // String bookmarkString =
 886         // ProjectPrefUtil.getMiscProjectsPreferenceValue(project,
 887         // IPreferenceConstants.PHP_BOOKMARK_DEFAULT);
 888         // if (bookmarkString != null && !bookmarkString.equals("")) {
 889         // String[] bookmarks = ExternalInterface.getBookmarkNames();
 890         // boolean foundBookmark = false;
 891         // for (int i = 0; i < bookmarks.length; i++) {
 892         // if (bookmarks[i].equals(bookmarkString)) {
 893         // foundBookmark = true;
 894         // }
 895         // }
 896         // if (!foundBookmark) {
 897         // return sqlResults;
 898         // }
 899         // // Bookmark bookmark = sqlBookMarks.find(bookmarkString);
 900         // ArrayList sqlList = new ArrayList();
 901         // if (!ExternalInterface.isBookmarkConnected(bookmarkString)) {
 902         // ExternalInterface.connectBookmark(bookmarkString, null);
 903         // if (!ExternalInterface.isBookmarkConnected(bookmarkString)) {
 904         // return sqlResults;
 905         // }
 906         // }
 907         // // if (ExternalInterface.isBookmarkConnected(bookmarkString)) {
 908         // try {
 909         // int start = context.getStart();
 910         // int end = context.getEnd();
 911         // String foundSQLTableName = sqlTable.getTableName();
 912         // String tableName;
 913         // String columnName;
 914         // String prefixWithoutDollar = prefix;
 915         // boolean isDollarPrefix = false;
 916         // if (prefix.length() > 0 && prefix.charAt(0) == '$') {
 917         // prefixWithoutDollar = prefix.substring(1);
 918         // isDollarPrefix = true;
 919         // }
 920         // IRegion region = new Region(start, end - start);
 921         // ResultSet set;
 922         // if (!isDollarPrefix) {
 923         // String[] tableNames = ExternalInterface.getMatchingTableNames(null,
 924         // bookmarkString, prefixWithoutDollar, null, false);
 925         // for (int i = 0; i < tableNames.length; i++) {
 926         // sqlList.add(new SQLProposal(tableNames[i], context, region, viewer,
 927         // PHPUiImages.get(PHPUiImages.IMG_TABLE)));
 928         // }
 929         // }
 930         //
 931         // String[] columnNames = ExternalInterface.getMatchingColumnNames(null,
 932         // bookmarkString, prefixWithoutDollar, null, false);
 933         // for (int i = 0; i < columnNames.length; i++) {
 934         // sqlList.add(new SQLProposal(columnNames[i], context, region, viewer,
 935         // PHPUiImages.get(PHPUiImages.IMG_TABLE)));
 936         // }
 937         //
 938         // sqlResults = new IPHPCompletionProposal[sqlList.size()];
 939         // for (int i = 0; i < sqlList.size(); i++) {
 940         // sqlResults[i] = (SQLProposal) sqlList.get(i);
 941         // }
 942         // } catch (Exception /* NotConnectedException */ e) {
 943         //
 944         // }
 945         // // }
 946         // }
 947         // // }
 948         // return sqlResults;
 949         // }
 950         private boolean looksLikeMethod(PHPCodeReader reader) throws IOException {
 951                 int curr = reader.read();
 952                 while (curr != PHPCodeReader.EOF && Character.isWhitespace((char) curr))
 953                         curr = reader.read();
 954
 955                 if (curr == PHPCodeReader.EOF)
 956                         return false;
 957
 958                 return Scanner.isPHPIdentifierPart((char) curr);
 959         }
 960
 961         private int guessContextInformationPosition(ITextViewer viewer, int offset) {
 962                 int contextPosition = offset;
 963                 IDocument document = viewer.getDocument();
 964                 try {
 965
 966                         PHPCodeReader reader = new PHPCodeReader();
 967                         reader.configureBackwardReader(document, offset, true, true);
 968
 969                         int nestingLevel = 0;
 970
 971                         int curr = reader.read();
 972                         while (curr != PHPCodeReader.EOF) {
 973
 974                                 if (')' == (char) curr)
 975                                         ++nestingLevel;
 976
 977                                 else if ('(' == (char) curr) {
 978                                         --nestingLevel;
 979
 980                                         if (nestingLevel < 0) {
 981                                                 int start = reader.getOffset();
 982                                                 if (looksLikeMethod(reader))
 983                                                         return start + 1;
 984                                         }
 985                                 }
 986
 987                                 curr = reader.read();
 988                         }
 989                 } catch (IOException e) {
 990                 }
 991                 return contextPosition;
 992         }
 993
 994         /**
 995          * @see IContentAssistProcessor#computeContextInformation(ITextViewer, int)
 996          */
 997         public IContextInformation[] computeContextInformation(ITextViewer viewer,
 998                         int offset) {
 999                 int contextInformationPosition = guessContextInformationPosition(
1000                                 viewer, offset);
1001                 List result = addContextInformations(viewer, contextInformationPosition);
1002                 return (IContextInformation[]) result
1003                                 .toArray(new IContextInformation[result.size()]);
1004         }
1005
1006         private List addContextInformations(ITextViewer viewer, int offset) {
1007                 ICompletionProposal[] proposals = internalComputeCompletionProposals(
1008                                 viewer, offset, -1);
1009                 List result = new ArrayList();
1010                 for (int i = 0; i < proposals.length; i++) {
1011                         IContextInformation contextInformation = proposals[i]
1012                                         .getContextInformation();
1013                         if (contextInformation != null) {
1014                                 ContextInformationWrapper wrapper = new ContextInformationWrapper(
1015                                                 contextInformation);
1016                                 wrapper.setContextInformationPosition(offset);
1017                                 result.add(wrapper);
1018                         }
1019                 }
1020                 return result;
1021         }
1022
1023         /**
1024          * Order the given proposals.
1025          */
1026         private ICompletionProposal[] order(ICompletionProposal[] proposals) {
1027                 Arrays.sort(proposals, fComparator);
1028                 // int len = proposals.length;
1029                 // if (len > 10) {
1030                 // len = 10;
1031                 // }
1032                 // for (int i = 0; i < len; i++) {
1033                 // System.out.println(proposals[i].getDisplayString());
1034                 // }
1035                 return proposals;
1036         }
1037
1038         /*
1039          * (non-Javadoc) Method declared on IContentAssistProcessor
1040          */
1041         public char[] getCompletionProposalAutoActivationCharacters() {
1042                 return fProposalAutoActivationSet;
1043                 // return null; // new char[] { '$' };
1044         }
1045
1046         /*
1047          * (non-Javadoc) Method declared on IContentAssistProcessor
1048          */
1049         public char[] getContextInformationAutoActivationCharacters() {
1050                 return null;
1051         }
1052
1053         /*
1054          * (non-Javadoc) Method declared on IContentAssistProcessor
1055          */
1056         public IContextInformationValidator getContextInformationValidator() {
1057                 if (fValidator == null)
1058                         fValidator = new JavaParameterListValidator();
1059                 return fValidator;
1060         }
1061
1062         /*
1063          * (non-Javadoc) Method declared on IContentAssistProcessor
1064          */
1065         public String getErrorMessage() {
1066                 return null;
1067         }
1068 }