std::string SystemPreferences::GetColor()

in shell/browser/api/electron_api_system_preferences_mac.mm [481:569]
88 lines of code
42 McCabe index (conditional complexity)

std::string SystemPreferences::GetColor(gin_helper::ErrorThrower thrower,
                                        const std::string& color) {
  NSColor* sysColor = nil;
  if (color == "alternate-selected-control-text") {
    sysColor = [NSColor alternateSelectedControlTextColor];
    EmitWarning(
        node::Environment::GetCurrent(thrower.isolate()),
        "'alternate-selected-control-text' is deprecated as an input to "
        "getColor.  Use 'selected-content-background' instead.",
        "electron");
  } else if (color == "control-background") {
    sysColor = [NSColor controlBackgroundColor];
  } else if (color == "control") {
    sysColor = [NSColor controlColor];
  } else if (color == "control-text") {
    sysColor = [NSColor controlTextColor];
  } else if (color == "disabled-control-text") {
    sysColor = [NSColor disabledControlTextColor];
  } else if (color == "find-highlight") {
    if (@available(macOS 10.14, *))
      sysColor = [NSColor findHighlightColor];
  } else if (color == "grid") {
    sysColor = [NSColor gridColor];
  } else if (color == "header-text") {
    sysColor = [NSColor headerTextColor];
  } else if (color == "highlight") {
    sysColor = [NSColor highlightColor];
  } else if (color == "keyboard-focus-indicator") {
    sysColor = [NSColor keyboardFocusIndicatorColor];
  } else if (color == "label") {
    sysColor = [NSColor labelColor];
  } else if (color == "link") {
    sysColor = [NSColor linkColor];
  } else if (color == "placeholder-text") {
    sysColor = [NSColor placeholderTextColor];
  } else if (color == "quaternary-label") {
    sysColor = [NSColor quaternaryLabelColor];
  } else if (color == "scrubber-textured-background") {
    if (@available(macOS 10.12.2, *))
      sysColor = [NSColor scrubberTexturedBackgroundColor];
  } else if (color == "secondary-label") {
    sysColor = [NSColor secondaryLabelColor];
  } else if (color == "selected-content-background") {
    if (@available(macOS 10.14, *))
      sysColor = [NSColor selectedContentBackgroundColor];
  } else if (color == "selected-control") {
    sysColor = [NSColor selectedControlColor];
  } else if (color == "selected-control-text") {
    sysColor = [NSColor selectedControlTextColor];
  } else if (color == "selected-menu-item-text") {
    sysColor = [NSColor selectedMenuItemTextColor];
  } else if (color == "selected-text-background") {
    sysColor = [NSColor selectedTextBackgroundColor];
  } else if (color == "selected-text") {
    sysColor = [NSColor selectedTextColor];
  } else if (color == "separator") {
    if (@available(macOS 10.14, *))
      sysColor = [NSColor separatorColor];
  } else if (color == "shadow") {
    sysColor = [NSColor shadowColor];
  } else if (color == "tertiary-label") {
    sysColor = [NSColor tertiaryLabelColor];
  } else if (color == "text-background") {
    sysColor = [NSColor textBackgroundColor];
  } else if (color == "text") {
    sysColor = [NSColor textColor];
  } else if (color == "under-page-background") {
    sysColor = [NSColor underPageBackgroundColor];
  } else if (color == "unemphasized-selected-content-background") {
    if (@available(macOS 10.14, *))
      sysColor = [NSColor unemphasizedSelectedContentBackgroundColor];
  } else if (color == "unemphasized-selected-text-background") {
    if (@available(macOS 10.14, *))
      sysColor = [NSColor unemphasizedSelectedTextBackgroundColor];
  } else if (color == "unemphasized-selected-text") {
    if (@available(macOS 10.14, *))
      sysColor = [NSColor unemphasizedSelectedTextColor];
  } else if (color == "window-background") {
    sysColor = [NSColor windowBackgroundColor];
  } else if (color == "window-frame-text") {
    sysColor = [NSColor windowFrameTextColor];
  } else {
    thrower.ThrowError("Unknown color: " + color);
  }

  if (sysColor)
    return ToRGBHex(skia::NSSystemColorToSkColor(sysColor));
  return "";
}