public static void trackStatistics(InsertionContext context, final StatisticsUpdate update) {
    if (ourPendingUpdate != update) {
      return;
    }

    final Document document = context.getDocument();
    int startOffset = context.getStartOffset();
    int tailOffset = context.getEditor().getCaretModel().getOffset();
    if (startOffset < 0 || tailOffset <= startOffset) {
      return;
    }

    final RangeMarker marker = document.createRangeMarker(startOffset, tailOffset);
    final DocumentAdapter listener =
        new DocumentAdapter() {
          @Override
          public void beforeDocumentChange(DocumentEvent e) {
            if (!marker.isValid()
                || e.getOffset() > marker.getStartOffset()
                    && e.getOffset() < marker.getEndOffset()) {
              cancelLastCompletionStatisticsUpdate();
            }
          }
        };

    ourStatsAlarm.addRequest(
        new Runnable() {
          @Override
          public void run() {
            if (ourPendingUpdate == update) {
              applyLastCompletionStatisticsUpdate();
            }
          }
        },
        20 * 1000);

    document.addDocumentListener(listener);
    Disposer.register(
        update,
        new Disposable() {
          @Override
          public void dispose() {
            document.removeDocumentListener(listener);
            marker.dispose();
            ourStatsAlarm.cancelAllRequests();
          }
        });
  }
 public void addSparedChars(
     CompletionProgressIndicator indicator,
     LookupElement item,
     InsertionContext context,
     char completionChar) {
   String textInserted;
   if (context.getStartOffset() >= 0 && context.getTailOffset() >= context.getStartOffset()) {
     textInserted =
         context
             .getDocument()
             .getText()
             .substring(context.getStartOffset(), context.getTailOffset());
   } else {
     textInserted = item.getLookupString();
   }
   String withoutSpaces =
       StringUtil.replace(
           textInserted, new String[] {" ", "\t", "\n"}, new String[] {"", "", ""});
   int spared = withoutSpaces.length() - indicator.getLookup().itemPattern(item).length();
   if (!LookupEvent.isSpecialCompletionChar(completionChar)
       && withoutSpaces.contains(String.valueOf(completionChar))) {
     spared--;
   }
   if (spared > 0) {
     mySpared += spared;
   }
 }
  public static boolean promptTypeArgs(InsertionContext context, int offset) {
    if (offset < 0) {
      return false;
    }

    OffsetKey key = context.trackOffset(offset, false);
    PostprocessReformattingAspect.getInstance(context.getProject()).doPostponedFormatting();
    offset = context.getOffset(key);
    if (offset < 0) {
      return false;
    }

    String open = escapeXmlIfNeeded(context, "<");
    context.getDocument().insertString(offset, open);
    context.getEditor().getCaretModel().moveToOffset(offset + open.length());
    context.getDocument().insertString(offset + open.length(), escapeXmlIfNeeded(context, ">"));
    context.setAddCompletionChar(false);
    return true;
  }
  public static boolean insertTail(
      InsertionContext context, LookupElement item, TailType tailType, boolean hasTail) {
    TailType toInsert = tailType;
    LookupItem<?> lookupItem = item.as(LookupItem.CLASS_CONDITION_KEY);
    if (lookupItem == null
        || lookupItem.getAttribute(LookupItem.TAIL_TYPE_ATTR) != TailType.UNKNOWN) {
      if (!hasTail
          && item.getObject() instanceof PsiMethod
          && ((PsiMethod) item.getObject()).getReturnType() == PsiType.VOID) {
        PsiDocumentManager.getInstance(context.getProject()).commitAllDocuments();
        if (psiElement()
            .beforeLeaf(psiElement().withText("."))
            .accepts(context.getFile().findElementAt(context.getTailOffset() - 1))) {
          return false;
        }

        boolean insertAdditionalSemicolon = true;
        final PsiReferenceExpression referenceExpression =
            PsiTreeUtil.getTopmostParentOfType(
                context.getFile().findElementAt(context.getStartOffset()),
                PsiReferenceExpression.class);
        if (referenceExpression instanceof PsiMethodReferenceExpression
            && LambdaHighlightingUtil.insertSemicolon(referenceExpression.getParent())) {
          insertAdditionalSemicolon = false;
        } else if (referenceExpression != null) {
          PsiElement parent = referenceExpression.getParent();
          if (parent instanceof PsiMethodCallExpression) {
            parent = parent.getParent();
          }
          if (parent instanceof PsiLambdaExpression
              && !LambdaHighlightingUtil.insertSemicolonAfter((PsiLambdaExpression) parent)) {
            insertAdditionalSemicolon = false;
          }
        }
        if (insertAdditionalSemicolon) {
          toInsert = TailType.SEMICOLON;
        }
      }
    }
    toInsert.processTail(context.getEditor(), context.getTailOffset());
    return true;
  }
 @Override
 protected TailType computeTailType(InsertionContext context) {
   return context.shouldAddCompletionChar() ? TailType.NONE : myTail;
 }
  public static void insertParentheses(
      final InsertionContext context,
      final LookupElement item,
      boolean overloadsMatter,
      boolean hasParams,
      final boolean forceClosingParenthesis) {
    final Editor editor = context.getEditor();
    final char completionChar = context.getCompletionChar();
    final PsiFile file = context.getFile();

    final TailType tailType =
        completionChar == '('
            ? TailType.NONE
            : completionChar == ':'
                ? TailType.COND_EXPR_COLON
                : LookupItem.handleCompletionChar(context.getEditor(), item, completionChar);
    final boolean hasTail = tailType != TailType.NONE && tailType != TailType.UNKNOWN;
    final boolean smart = completionChar == Lookup.COMPLETE_STATEMENT_SELECT_CHAR;

    if (completionChar == '('
        || completionChar == '.'
        || completionChar == ','
        || completionChar == ';'
        || completionChar == ':'
        || completionChar == ' ') {
      context.setAddCompletionChar(false);
    }

    if (hasTail) {
      hasParams = false;
    }
    final boolean needRightParenth =
        forceClosingParenthesis
            || !smart
                && (CodeInsightSettings.getInstance().AUTOINSERT_PAIR_BRACKET
                    || !hasParams && completionChar != '(');

    context.commitDocument();

    final CommonCodeStyleSettings styleSettings = context.getCodeStyleSettings();
    final PsiElement elementAt = file.findElementAt(context.getStartOffset());
    if (elementAt == null || !(elementAt.getParent() instanceof PsiMethodReferenceExpression)) {
      ParenthesesInsertHandler.getInstance(
              hasParams,
              styleSettings.SPACE_BEFORE_METHOD_CALL_PARENTHESES,
              styleSettings.SPACE_WITHIN_METHOD_CALL_PARENTHESES && hasParams,
              needRightParenth,
              styleSettings.METHOD_PARAMETERS_LPAREN_ON_NEXT_LINE)
          .handleInsert(context, item);
    }

    if (hasParams) {
      // Invoke parameters popup
      AutoPopupController.getInstance(file.getProject())
          .autoPopupParameterInfo(editor, overloadsMatter ? null : (PsiElement) item.getObject());
    }

    if (smart || !needRightParenth || !insertTail(context, item, tailType, hasTail)) {
      return;
    }

    if (completionChar == '.') {
      AutoPopupController.getInstance(file.getProject())
          .autoPopupMemberLookup(context.getEditor(), null);
    } else if (completionChar == ',') {
      AutoPopupController.getInstance(file.getProject())
          .autoPopupParameterInfo(context.getEditor(), null);
    }
  }
 public static String escapeXmlIfNeeded(InsertionContext context, String generics) {
   if (context.getFile().getViewProvider().getBaseLanguage() == StdLanguages.JSPX) {
     return StringUtil.escapeXml(generics);
   }
   return generics;
 }
  @Override
  public void handleInsert(InsertionContext context) {
    final Document document = context.getEditor().getDocument();
    document.replaceString(context.getStartOffset(), context.getTailOffset(), ";");
    final InsertionContext qualifierContext =
        CompletionUtil.emulateInsertion(context, context.getStartOffset(), myQualifier);
    OffsetKey oldStart = context.trackOffset(context.getStartOffset(), false);

    int start =
        CharArrayUtil.shiftForward(
            context.getDocument().getCharsSequence(), context.getStartOffset(), " \t\n");
    if (shouldParenthesizeQualifier(context.getFile(), start, qualifierContext.getTailOffset())) {
      final String space =
          CodeStyleSettingsManager.getSettings(qualifierContext.getProject())
                  .SPACE_WITHIN_PARENTHESES
              ? " "
              : "";
      document.insertString(start, "(" + space);
      document.insertString(qualifierContext.getTailOffset(), space + ")");
    }

    final char atTail = document.getCharsSequence().charAt(context.getTailOffset() - 1);
    if (atTail != ';') {
      LOG.error(
          LogMessageEx.createEvent(
              "Unexpected character",
              "atTail="
                  + atTail
                  + "\n"
                  + "offset="
                  + context.getTailOffset()
                  + "\n"
                  + "item="
                  + this
                  + "\n"
                  + "item.class="
                  + this.getClass()
                  + "\n"
                  + DebugUtil.currentStackTrace(),
              AttachmentFactory.createAttachment(context.getDocument())));
    }
    document.replaceString(context.getTailOffset() - 1, context.getTailOffset(), ".");

    CompletionUtil.emulateInsertion(getDelegate(), context.getTailOffset(), context);
    context.commitDocument();

    int formatStart = context.getOffset(oldStart);
    int formatEnd = context.getTailOffset();
    if (formatStart >= 0 && formatEnd >= 0) {
      CodeStyleManager.getInstance(context.getProject())
          .reformatText(context.getFile(), formatStart, formatEnd);
    }
  }