mockit.coverage.reporting.sourceFiles.NeutralOutput Maven / Gradle / Ivy

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JMockit Coverage is a code coverage tool with several metrics (line, path, data) capable of generating HTML reports. It is designed with ease of use in mind, avoiding the need for complex configuration. Instead, smart (but overridable) defaults are employed, such as the selection of which classes to consider for coverage, and where to find sources files for report generation.

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/*
 * Copyright (c) 2006-2015 Rogério Liesenfeld
 * This file is subject to the terms of the MIT license (see LICENSE.txt).
 */
package mockit.coverage.reporting.sourceFiles;

import java.io.*;
import javax.annotation.*;

import mockit.coverage.reporting.parsing.*;

final class NeutralOutput
{
   @Nonnull private final PrintWriter output;
   private boolean previousLineInImports;
   private boolean previousLineInComments;
   @Nullable private String lineIndentation;
   private boolean blankLinesPending;

   NeutralOutput(@Nonnull PrintWriter output) { this.output = output; }

   boolean writeLineWithoutCoverageInfo(@Nonnull LineParser lineParser)
   {
      if (previousLineInComments || !previousLineInImports) {
         if (writeLineInComments(lineParser) || writeLineInImports(lineParser)) {
            return true;
         }
      }
      else if (writeLineInImports(lineParser) || writeLineInComments(lineParser)) {
         return true;
      }

      if (lineParser.isBlankLine()) {
         blankLinesPending = true;
         return true;
      }

      writeBlankLineIfPending();
      return false;
   }

   private boolean writeLineInComments(@Nonnull LineParser lineParser)
   {
      LineElement initialElement = lineParser.getInitialElement();

      if (
         lineParser.isInComments() ||
         previousLineInComments && initialElement.isComment() && initialElement.getNext() == null
      ) {
         String lineText = initialElement.toString();

         if (previousLineInComments) {
            output.println();
         }
         else {
            writeOpeningForCollapsibleBlockOfLines();
            output.write("      ");
            extractLineIndentation(lineText);
            previousLineInComments = true;
         }

         output.write(lineText);
         return true;
      }
      else if (previousLineInComments) {
         output.append("
").append(lineIndentation).println("/*...*/");
         output.println("    ");
         previousLineInComments = false;
      }

      return false;
   }

   private void writeOpeningForCollapsibleBlockOfLines()
   {
      writeBlankLineIfPending();
      output.println("    ");
      output.println("       ");
   }

   private void writeBlankLineIfPending()
   {
      if (blankLinesPending) {
         output.println("     ");
         blankLinesPending = false;
      }
   }

   private void extractLineIndentation(@Nonnull String lineText)
   {
      int indentationSize = 0;

      for (int i = 0; i < lineText.length(); i++, indentationSize++) {
         if (lineText.charAt(i) > ' ') break;
      }

      lineIndentation = lineText.substring(0, indentationSize);
   }

   private boolean writeLineInImports(@Nonnull LineParser lineParser)
   {
      LineElement initialElement = lineParser.getInitialElement();
      boolean isImport = initialElement.isKeyword("import");

      if (!previousLineInImports && isImport || previousLineInImports && (isImport || lineParser.isBlankLine())) {
         String lineText = initialElement.toString();

         if (previousLineInImports) {
            output.println();
            blankLinesPending = !isImport;
         }
         else {
            writeOpeningForCollapsibleBlockOfLines();
            output.write("      ");
            previousLineInImports = true;
         }

         output.write(lineText);
         return true;
      }
      else if (previousLineInImports) {
         output.println("
import ...");
         output.println("    ");
         previousLineInImports = false;
      }

      return false;
   }
}