Fix the language server / PDE error highlighting another way

app/src/processing/app/Problem.java

@@ -28,21 +28,6 @@
  */
 public interface Problem {
 
-  /**
-   * Strategy converting line number in tab to character offset from tab start.
-   */
-  public interface LineToTabOffsetGetter {
-
-    /**
-     * Convert a line number to the number of characters past tab start.
-     * 
-     * @param line The line number to convert.
-     * @return The number of characters past tab start where that line starts.
-     */
-    public int get(int line);
-
-  }
-
   /**
    * Get if the problem is an error that prevented compilation.
    * 
@@ -81,56 +66,21 @@ public interface LineToTabOffsetGetter {
    */
   public String getMessage();
 
-  /**
-   * Get the exact character on which this problem starts in code tab relative.
-   * 
-   * @return Number of characters past the start of the tab if known where the
-   *    code associated with the Problem starts. Returns empty if not provided.
-   */
-  public Optional<Integer> getTabStartOffset();
-
-  /**
-   * Get the exact character on which this problem ends in code tab relative.
-   * 
-   * @return Number of characters past the start of the tab if known where the
-   *    code associated with the Problem ends. Returns empty if not provided.
-   */
-  public Optional<Integer> getTabStopOffset();
-
   /**
    * Get the exact character on which this problem starts in code line relative.
    * 
    * @return Number of characters past the start of the line if known where the
-   *    code associated with the Problem starts. Returns empty if not provided.
+   *    code associated with the Problem starts.
    */
-  public Optional<Integer> getLineStartOffset();
+  public int getStartOffset();
 
   /**
    * Get the exact character on which this problem ends in code line relative.
    * 
    * @return Number of characters past the start of the line if known where the
-   *    code associated with the Problem ends. Returns empty if not provided.
-   */
-  public Optional<Integer> getLineStopOffset();
-
-  /**
-   * Get the exact character on which this problem ends in code tab relative.
-   * 
-   * @param strategy Strategy to convert line to tab start if needed.
-   * @return Number of characters past the start of the tab if known where the
-   *    code associated with the Problem ends, using the provided conversion
-   *    if needed. Returns line start if character position not given.
+   *    code associated with the Problem ends.
    */
-  public int computeTabStartOffset(LineToTabOffsetGetter strategy);
+  public int getStopOffset();
 
-  /**
-   * Get the exact character on which this problem ends in code tab relative.
-   * 
-   * @param strategy Strategy to convert line to tab start if needed.
-   * @return Number of characters past the start of the tab if known where the
-   *    code associated with the Problem ends, using the provided conversion
-   *    if needed. Returns line start if character position not given.
-   */
-  public int computeTabStopOffset(LineToTabOffsetGetter strategy);
 }
 

app/src/processing/app/syntax/PdeTextAreaPainter.java

@@ -46,8 +46,6 @@ public class PdeTextAreaPainter extends TextAreaPainter {
   protected Color gutterTextInactiveColor;
   protected Color gutterHighlightColor;
 
-  private final Problem.LineToTabOffsetGetter lineToTabOffsetGetter;
-
 
   public PdeTextAreaPainter(JEditTextArea textArea, TextAreaDefaults defaults) {
     super(textArea, defaults);
@@ -78,10 +76,6 @@ public void mousePressed(MouseEvent event) {
         }
       }
     });
-
-    lineToTabOffsetGetter = (x) -> {
-      return textArea.getLineStartOffset(x);
-    };
   }
 
 
@@ -153,14 +147,11 @@ protected void paintLine(Graphics gfx, int line, int x, TokenMarkerState marker)
   protected void paintErrorLine(Graphics gfx, int line, int x) {
     List<Problem> problems = getEditor().findProblems(line);
     for (Problem problem : problems) {
-      int startOffset = problem.computeTabStartOffset(lineToTabOffsetGetter);
-      int stopOffset = problem.computeTabStopOffset(lineToTabOffsetGetter);
-
       int lineOffsetStart = textArea.getLineStartOffset(line);
       int lineOffsetStop = textArea.getLineStopOffset(line);
 
-      int wiggleStart = Math.max(startOffset, lineOffsetStart);
-      int wiggleStop = Math.min(stopOffset, lineOffsetStop);
+      int wiggleStart = lineOffsetStart + problem.getStartOffset();
+      int wiggleStop = lineOffsetStart + problem.getStopOffset();
 
       int y = textArea.lineToY(line) + getLineDisplacement();
 
@@ -338,8 +329,8 @@ public String getToolTipText(MouseEvent event) {
         int lineStart = textArea.getLineStartOffset(line);
         int lineEnd = textArea.getLineStopOffset(line);
 
-        int errorStart = problem.computeTabStartOffset(lineToTabOffsetGetter);
-        int errorEnd = problem.computeTabStopOffset(lineToTabOffsetGetter) + 1;
+        int errorStart = lineStart + problem.getStartOffset();
+        int errorEnd = lineStart + problem.getStopOffset();
 
         int startOffset = Math.max(errorStart, lineStart) - lineStart;
         int stopOffset = Math.min(errorEnd, lineEnd) - lineStart;

app/src/processing/app/ui/Editor.java

@@ -2556,16 +2556,16 @@ public void updateErrorTable(List<Problem> problems) {
 
 
   public void highlight(Problem p) {
-    Problem.LineToTabOffsetGetter getter = (x) -> {
-      return textarea.getLineStartOffset(x);
-    };
-
-    if (p != null) {
-      int tabIndex = p.getTabIndex();
-      int tabToStartOffset = p.computeTabStartOffset(getter);
-      int tabToStopOffset = p.computeTabStopOffset(getter);
-      highlight(tabIndex, tabToStartOffset, tabToStopOffset);
+    if (p == null) {
+      return;
     }
+
+    int tabIndex = p.getTabIndex();
+    int lineNumber = p.getLineNumber();
+    int lineStart = textarea.getLineStartOffset(lineNumber);
+    int tabToStartOffset = lineStart + p.getStartOffset();
+    int tabToStopOffset = lineStart + p.getStopOffset();
+    highlight(tabIndex, tabToStartOffset, tabToStopOffset);
   }
 
 
@@ -2630,11 +2630,10 @@ public List<Problem> findProblems(int line) {
         .filter(p -> p.getTabIndex() == currentTab)
         .filter(p -> {
           int pStartLine = p.getLineNumber();
-          int pEndOffset = p.computeTabStopOffset(
-            (startLine) -> textarea.getLineStartOffset(pStartLine)
-          );
+          int lineOffset = textarea.getLineStartOffset(pStartLine);
+          int pEndOffset = lineOffset + p.getStopOffset();
           int pEndLine = textarea.getLineOfOffset(pEndOffset);
-
+          
           return line >= pStartLine && line <= pEndLine;
         })
         .collect(Collectors.toList());

java/src/processing/mode/java/ErrorChecker.java

@@ -199,7 +199,7 @@ static private JavaProblem convertIProblem(IProblem iproblem, PreprocSketch ps)
       String badCode = ps.getPdeCode(in);
       int line = ps.tabOffsetToTabLine(in.tabIndex, in.startTabOffset);
       JavaProblem p = JavaProblem.fromIProblem(iproblem, in.tabIndex, line, badCode);
-      p.setPDEOffsets(in.startTabOffset, in.stopTabOffset);
+      p.setPDEOffsets(0, iproblem.getSourceEnd() - iproblem.getSourceStart());
       return p;
     }
     return null;
@@ -252,7 +252,6 @@ static private List<JavaProblem> checkForCurlyQuotes(PreprocSketch ps) {
 
       String message = Language.interpolate("editor.status.bad_curly_quote", q);
       JavaProblem problem = new JavaProblem(message, JavaProblem.ERROR, tabIndex, tabLine);
-      problem.setPDEOffsets(tabOffset, tabOffset+1);
 
       problems.add(problem);
     }
@@ -294,7 +293,6 @@ static private List<JavaProblem> checkForCurlyQuotes(PreprocSketch ps) {
                 message = Language.interpolate("editor.status.bad_curly_quote", q);
               }
               JavaProblem p = new JavaProblem(message, JavaProblem.ERROR, in.tabIndex, line);
-              p.setPDEOffsets(tabStart, tabStop);
               problems2.add(p);
             }
           }

java/src/processing/mode/java/JavaProblem.java

@@ -20,8 +20,6 @@
 
 package processing.mode.java;
 
-import java.util.Optional;
-
 import org.eclipse.jdt.core.compiler.IProblem;
 
 import processing.app.Problem;
@@ -44,9 +42,9 @@ public class JavaProblem implements Problem {
   /** Line number (pde code) of the error */
   private final int lineNumber;
 
-  private Optional<Integer> startOffset;
+  private int startOffset;
 
-  private Optional<Integer> stopOffset;
+  private int stopOffset;
 
   /**
    * If the error is a 'cannot find type' contains the list of suggested imports
@@ -62,8 +60,10 @@ public JavaProblem(String message, int type, int tabIndex, int lineNumber) {
     this.type = type;
     this.tabIndex = tabIndex;
     this.lineNumber = lineNumber;
-    this.startOffset = Optional.empty();
-    this.stopOffset = Optional.empty();
+
+    // Default to 0, 1 unless a longer section is specified
+    this.startOffset = 0;
+    this.stopOffset = 1;
   }
 
 
@@ -87,32 +87,22 @@ static public JavaProblem fromIProblem(IProblem iProblem, int tabIndex,
 
 
   public void setPDEOffsets(int startOffset, int stopOffset){
-    this.startOffset = Optional.of(startOffset);
-    this.stopOffset = Optional.of(stopOffset);
+    this.startOffset = startOffset;
+    this.stopOffset = stopOffset;
   }
 
 
   @Override
-  public Optional<Integer> getTabStartOffset() {
+  public int getStartOffset() {
     return startOffset;
   }
 
 
   @Override
-  public Optional<Integer> getTabStopOffset() {
+  public int getStopOffset() {
     return stopOffset;
   }
 
-  @Override
-  public Optional<Integer> getLineStartOffset() {
-    return Optional.empty();
-  }
-
-  @Override
-  public Optional<Integer> getLineStopOffset() {
-    return Optional.empty();
-  }
-
   @Override
   public boolean isError() {
     return type == ERROR;
@@ -163,36 +153,4 @@ public String toString() {
         + message;
   }
 
-  @Override
-  public int computeTabStartOffset(LineToTabOffsetGetter strategy) {
-    Optional<Integer> nativeTabStartOffset = getTabStartOffset();
-    if (nativeTabStartOffset.isPresent()) {
-      return nativeTabStartOffset.get();
-    }
-
-    Optional<Integer> lineStartOffset = getLineStartOffset();
-    int lineOffset = strategy.get(getLineNumber());
-    if (lineStartOffset.isPresent()) {
-      return lineOffset + lineStartOffset.get();
-    } else {
-      return lineOffset;
-    }
-  }
-
-  @Override
-  public int computeTabStopOffset(LineToTabOffsetGetter strategy) {
-    Optional<Integer> nativeTabStopOffset = getTabStopOffset();
-    if (nativeTabStopOffset.isPresent()) {
-      return nativeTabStopOffset.get();
-    }
-
-    Optional<Integer> lineStopOffset = getLineStopOffset();
-    int lineOffset = strategy.get(getLineNumber());
-    if (lineStopOffset.isPresent()) {
-      return lineOffset + lineStopOffset.get();
-    } else {
-      return lineOffset;
-    }
-  }
-
 }

java/src/processing/mode/java/PreprocService.java

@@ -99,7 +99,7 @@ public class PreprocService {
     }};
 
   /**
-   * Create a new preprocessing service to support an editor.
+   * Create a new preprocessing service to support the language server.
    */
   public PreprocService(JavaMode javaMode, Sketch sketch) {
     this.javaMode = javaMode;
@@ -411,10 +411,12 @@ private PreprocSketch preprocessSketch(PreprocSketch prevResult) {
       throw new RuntimeException("Unexpected sketch exception in preprocessing: " + e);
     }
 
+    final int endNumLines = numLines;
+
     if (preprocessorResult.getPreprocessIssues().size() > 0) {
       preprocessorResult.getPreprocessIssues().stream()
-          .map((x) -> ProblemFactory.build(x, tabLineStarts))
-          .forEach(result.otherProblems::add);
+        .map((x) -> ProblemFactory.build(x, tabLineStarts))
+        .forEach(result.otherProblems::add);
 
       result.hasSyntaxErrors = true;
     }

java/src/processing/mode/java/ProblemFactory.java

@@ -14,50 +14,6 @@
  */
 public class ProblemFactory {
 
-  /**
-   * Create a new {Problem}.
-   *
-   * @param pdePreprocessIssue The preprocess issue found.
-   * @param tabStarts The list of line numbers on which each tab starts.
-   * @param editor The editor in which errors will appear.
-   * @return Newly created problem.
-   */
-  public static Problem build(PdePreprocessIssue pdePreprocessIssue, List<Integer> tabStarts,
-      int numLines, Editor editor) {
-
-    int line = pdePreprocessIssue.getLine();
-
-    // Sometimes errors are reported one line past end of sketch. Fix that.
-    if (line >= numLines) {
-      line = numLines - 1;
-    }
-
-    // Get local area
-    TabLine tabLine = getTab(tabStarts, line);
-
-    int tab = tabLine.getTab();
-    int localLine = tabLine.getLineInTab(); // Problems emitted in 0 index
-
-    // Generate syntax problem
-    String message = pdePreprocessIssue.getMsg();
-
-    int lineStart = editor.getLineStartOffset(localLine);
-    int lineStop = editor.getLineStopOffset(localLine) - 1;
-
-    if (lineStart == lineStop) {
-      lineStop++;
-    }
-
-    return new SyntaxProblem(
-        tab,
-        localLine,
-        message,
-        lineStart,
-        lineStop,
-        false
-    );
-  }
-
   /**
    * Create a new {Problem}.
    *
@@ -85,8 +41,7 @@ public static Problem build(PdePreprocessIssue pdePreprocessIssue, List<Integer>
         localLine,
         message,
         0,
-        col,
-        true
+        col
     );
   }