public void customizeCellRenderer()

in flutter-idea/src/io/flutter/view/DiagnosticsTreeCellRenderer.java [63:225]
138 lines of code
38 McCabe index (conditional complexity)

  public void customizeCellRenderer(
    @NotNull final JTree tree,
    final Object value,
    final boolean selected,
    final boolean expanded,
    final boolean leaf,
    final int row,
    final boolean hasFocus
  ) {
    this.tree = tree;
    this.selected = selected;

    setOpaque(false);
    setIconOpaque(false);
    setTransparentIconBackground(true);

    final Object userObject = ((DefaultMutableTreeNode)value).getUserObject();
    if (userObject instanceof String) {
      appendText((String)userObject, SimpleTextAttributes.GRAYED_ATTRIBUTES);
      return;
    }
    if (!(userObject instanceof DiagnosticsNode)) return;
    final DiagnosticsNode node = (DiagnosticsNode)userObject;

    boolean highlight = selected;
    boolean isLinkedChild = false;
    // Highlight nodes that exist in both the details and summary tree to
    // show how the trees are linked together.
    if (!highlight && panel.isHighlightNodesShownInBothTrees()) {
      if (panel.detailsSubtree && panel.isCreatedByLocalProject(node)) {
        isLinkedChild = panel.parentTree.hasDiagnosticsValue(node.getValueRef());
      }
      else {
        if (panel.subtreePanel != null) {
          isLinkedChild = panel.subtreePanel.hasDiagnosticsValue(node.getValueRef());
        }
      }
    }
    if (highlight) {
      setOpaque(true);
      setIconOpaque(false);
      setTransparentIconBackground(true);
      setBackground(HIGHLIGHT_COLOR);
      // TODO(jacobr): consider using UIUtil.getTreeSelectionBackground() instead.
    }
    else if (isLinkedChild || panel.currentShowNode == value) {
      setOpaque(true);
      setIconOpaque(false);
      setTransparentIconBackground(true);
      setBackground(panel.currentShowNode == value ? SHOW_MATCH_COLOR : LINKED_COLOR);
    }

    final String name = node.getName();
    SimpleTextAttributes textAttributes = InspectorPanel.textAttributesForLevel(node.getLevel());
    if (node.isProperty()) {
      // Display of inline properties.
      final String propertyType = node.getPropertyType();
      final JsonObject properties = node.getValuePropertiesJson();
      if (panel.isCreatedByLocalProject(node)) {
        textAttributes = textAttributes
          .derive(SimpleTextAttributes.REGULAR_ITALIC_ATTRIBUTES.getStyle(), null, null, null);
      }

      if (StringUtils.isNotEmpty(name) && node.getShowName()) {
        appendText(name + node.getSeparator() + " ", textAttributes);
      }

      String description = node.getDescription();
      if (propertyType != null && properties != null) {
        switch (propertyType) {
          case "Color": {
            final int alpha = getIntMember(properties, "alpha");
            final int red = getIntMember(properties, "red");
            final int green = getIntMember(properties, "green");
            final int blue = getIntMember(properties, "blue");

            if (alpha == 255) {
              description = String.format("#%02x%02x%02x", red, green, blue);
            }
            else {
              description = String.format("#%02x%02x%02x%02x", alpha, red, green, blue);
            }

            //noinspection UseJBColor
            final Color color = new Color(red, green, blue, alpha);
            this.addIcon(colorIconMaker.getCustomIcon(color));
            this.setIconOpaque(false);
            this.setTransparentIconBackground(true);
            break;
          }

          case "IconData": {
            final int codePoint = getIntMember(properties, "codePoint");
            if (codePoint > 0) {
              final Icon icon = FlutterMaterialIcons.getIconForHex(String.format("%1$04x", codePoint));
              if (icon != null) {
                this.addIcon(icon);
                this.setIconOpaque(false);
                this.setTransparentIconBackground(true);
              }
            }
            break;
          }
        }
      }

      if (SHOW_RENDER_OBJECT_PROPERTIES_AS_LINKS && propertyType.equals("RenderObject")) {
        textAttributes = textAttributes
          .derive(SimpleTextAttributes.LINK_ATTRIBUTES.getStyle(), JBColor.blue, null, null);
      }

      // TODO(jacobr): custom display for units, iterables, and padding.
      appendText(description, textAttributes);
      if (node.getLevel().equals(DiagnosticLevel.fine) && node.hasDefaultValue()) {
        appendText(" ", textAttributes);
        this.addIcon(panel.defaultIcon);
      }
    }
    else {
      // Non property, regular node case.
      if (StringUtils.isNotEmpty(name) && node.getShowName() && !name.equals("child")) {
        if (name.startsWith("child ")) {
          appendText(name, SimpleTextAttributes.GRAYED_ATTRIBUTES);
        }
        else {
          appendText(name, textAttributes);
        }

        if (node.getShowSeparator()) {
          appendText(node.getSeparator(), SimpleTextAttributes.GRAY_ATTRIBUTES);
        }
        else {
          appendText(" ", SimpleTextAttributes.GRAY_ATTRIBUTES);
        }
      }

      if (panel.detailsSubtree && panel.isCreatedByLocalProject(node) && !panel.isHighlightNodesShownInBothTrees()) {
        textAttributes = textAttributes.derive(
          SimpleTextAttributes.REGULAR_BOLD_ATTRIBUTES.getStyle(), null, null, null);
      }

      final String description = node.getDescription();
      final Matcher match = primaryDescriptionPattern.matcher(description);
      if (match.matches()) {
        appendText(" ", SimpleTextAttributes.GRAY_ATTRIBUTES);
        appendText(match.group(1), textAttributes);
        appendText(" ", textAttributes);
        appendText(match.group(2), SimpleTextAttributes.GRAYED_ATTRIBUTES);
      }
      else if (!node.getDescription().isEmpty()) {
        appendText(" ", SimpleTextAttributes.GRAY_ATTRIBUTES);
        appendText(node.getDescription(), textAttributes);
      }

      // TODO(devoncarew): For widgets that are definied in the current project, we could consider
      // appending the relative path to the defining library ('lib/src/foo_page.dart').

      final Icon icon = node.getIcon();
      if (icon != null) {
        setIcon(icon);
      }
    }
  }