Kategorie: Allgemein

Leider ist der Eintrag nur auf Amerikanisches Englisch verfügbar. Der Inhalt wird unten in einer verfügbaren Sprache angezeigt. Klicken Sie auf den Link, um die aktuelle Sprache zu ändern.

Yes, I am still using AntTweakBar. As you might know, the development of AntTweakBar is discontinued. At some point in the future, I will switch. Currently, I consider imgui the best successor. But I haven’t had time to look into imgui. So, when I resurrected an old small tool of mine, it still used ATB, and I did not want to recode all of this. But out of „because-I-can,“ I decided  to update all dependencies to their newest versions. As a result the ATB integration with GLFW 3 did not work any longer. A couple of callback functions where changed between GLFW 2 and GLFW 3. I ended up rewriting my glue code between those two libraries.

Here it is, if any of you ever come across the same issue. First the callbacks:

static void keyCallback(GLFWwindow* window, int key, int scancode, int action, int mods)
{
#ifdef HAS_ANTTWEAK_BAR
  if (action == GLFW_PRESS || action == GLFW_REPEAT)
  {
    int twMod = 0;
    bool ctrl;
    if (mods & GLFW_MOD_SHIFT) twMod |= TW_KMOD_SHIFT;
    if (ctrl = (mods & GLFW_MOD_CONTROL)) twMod |= TW_KMOD_CTRL;
    if (mods & GLFW_MOD_ALT) twMod |= TW_KMOD_ALT;

    int twKey = 0;
    switch (key)
    {
    case GLFW_KEY_BACKSPACE: twKey = TW_KEY_BACKSPACE; break;
    case GLFW_KEY_TAB: twKey = TW_KEY_TAB; break;
    //case GLFW_KEY_???: twKey = TW_KEY_CLEAR; break;
    case GLFW_KEY_ENTER: twKey = TW_KEY_RETURN; break;
    case GLFW_KEY_PAUSE: twKey = TW_KEY_PAUSE; break;
    case GLFW_KEY_ESCAPE: twKey = TW_KEY_ESCAPE; break;
    case GLFW_KEY_SPACE: twKey = TW_KEY_SPACE; break;
    case GLFW_KEY_DELETE: twKey = TW_KEY_DELETE; break;
    case GLFW_KEY_UP: twKey = TW_KEY_UP; break;
    case GLFW_KEY_DOWN: twKey = TW_KEY_DOWN; break;
    case GLFW_KEY_RIGHT: twKey = TW_KEY_RIGHT; break;
    case GLFW_KEY_LEFT: twKey = TW_KEY_LEFT; break;
    case GLFW_KEY_INSERT: twKey = TW_KEY_INSERT; break;
    case GLFW_KEY_HOME: twKey = TW_KEY_HOME; break;
    case GLFW_KEY_END: twKey = TW_KEY_END; break;
    case GLFW_KEY_PAGE_UP: twKey = TW_KEY_PAGE_UP; break;
    case GLFW_KEY_PAGE_DOWN: twKey = TW_KEY_PAGE_DOWN; break;
    case GLFW_KEY_F1: twKey = TW_KEY_F1; break;
    case GLFW_KEY_F2: twKey = TW_KEY_F2; break;
    case GLFW_KEY_F3: twKey = TW_KEY_F3; break;
    case GLFW_KEY_F4: twKey = TW_KEY_F4; break;
    case GLFW_KEY_F5: twKey = TW_KEY_F5; break;
    case GLFW_KEY_F6: twKey = TW_KEY_F6; break;
    case GLFW_KEY_F7: twKey = TW_KEY_F7; break;
    case GLFW_KEY_F8: twKey = TW_KEY_F8; break;
    case GLFW_KEY_F9: twKey = TW_KEY_F9; break;
    case GLFW_KEY_F10: twKey = TW_KEY_F10; break;
    case GLFW_KEY_F11: twKey = TW_KEY_F11; break;
    case GLFW_KEY_F12: twKey = TW_KEY_F12; break;
    case GLFW_KEY_F13: twKey = TW_KEY_F13; break;
    case GLFW_KEY_F14: twKey = TW_KEY_F14; break;
    case GLFW_KEY_F15: twKey = TW_KEY_F15; break;
    }
    if (twKey == 0 && ctrl && key < 128)
    {
      twKey = key;
    }
    if (twKey != 0)
    {
      if (::TwKeyPressed(twKey, twMod)) return;
    }
  }
#endif
}

static void charCallback(GLFWwindow* window, unsigned int key)
{
#ifdef HAS_ANTTWEAK_BAR
  if (::TwKeyPressed(key, 0)) return;
#endif
}

static void mousebuttonCallback(GLFWwindow* window, int button, int action, int mods)
{
#ifdef HAS_ANTTWEAK_BAR
  if (::TwEventMouseButtonGLFW(button, action)) return;
#endif
}

static void mousePosCallback(GLFWwindow* window, double xpos, double ypos)
{
#ifdef HAS_ANTTWEAK_BAR
  if (::TwEventMousePosGLFW((int)xpos, (int)ypos)) return;
#endif
}

static void mouseScrollCallback(GLFWwindow* window, double xoffset, double yoffset)
{
#ifdef HAS_ANTTWEAK_BAR
  static double pos = 0;
  pos += yoffset;
  if (::TwEventMouseWheelGLFW((int)pos)) return;
#endif
}

static void resizeCallback(GLFWwindow* window, int width, int height)
{
#ifdef HAS_ANTTWEAK_BAR
  ::TwWindowSize(width, height);
#endif
}

Of course, you can omit the #ifdefs if you don’t care. Add your own codes to the functions after ATB has been handled.

Then, it’s just your typical initialization of GLFW callbacks:

::glfwSetKeyCallback(window, keyCallback);
::glfwSetCharCallback(window, charCallback);
::glfwSetMouseButtonCallback(window, mousebuttonCallback);
::glfwSetCursorPosCallback(window, mousePosCallback);
::glfwSetScrollCallback(window, mouseScrollCallback);
::glfwSetWindowSizeCallback(window, resizeCallback);

Leider ist der Eintrag nur auf Amerikanisches Englisch verfügbar. Der Inhalt wird unten in einer verfügbaren Sprache angezeigt. Klicken Sie auf den Link, um die aktuelle Sprache zu ändern.

As can be read on the internet: HtmlAgilityPack is not for beautiful, aka human readable, html files.

“[…] it’s a ‘by design’ choice.” [https://stackoverflow.com/a/5969074]

So everyone redirects you to some other library.

Now, I am a bit stubborn. I want to use HtmlAgilityPack and I want to have indented, human-readable html files. The magic is within text nodes in the DOM. So, I wrote two utility functions to help me out.

First, to get rid of all unwanted whitespaces. This one might be a bit aggressiv, but it was ok for me:

static private void removeWhitespace(HtmlNode node) {
  foreach (HtmlNode n in node.ChildNodes.ToArray()) {
    if (n.NodeType == HtmlNodeType.Text) {
      if (string.IsNullOrWhiteSpace(n.InnerHtml)) {
        node.RemoveChild(n);
      }
    } else removeWhitespace(n);
  }
}

And, second, to create white spaces for line breaks and indentions:

internal static void beautify(HtmlDocument doc) {
  foreach (var topNode in doc.DocumentNode.ChildNodes.ToArray()) {
    switch (topNode.NodeType) {
      case HtmlNodeType.Comment: {
          HtmlCommentNode cn = (HtmlCommentNode)topNode;
          if (string.IsNullOrEmpty(cn.Comment)) continue;
          if (!cn.Comment.EndsWith("\n")) cn.Comment += "\n";
        } break;
      case HtmlNodeType.Element: {
          beautify(topNode, 0);
          topNode.AppendChild(doc.CreateTextNode("\n"));
          //doc.DocumentNode.InsertAfter(doc.CreateTextNode("\n"), topNode);
        } break;
      case HtmlNodeType.Text:
        break;
      default:
        break;
    }
  }
}

private static bool beautify(HtmlNode node, int level) {
  if (!node.HasChildNodes) return false;

  var children = node.ChildNodes.ToArray();
  bool onlyText = true;
  foreach (var c in children) {
    if (c.NodeType != HtmlNodeType.Text) onlyText = false;
  }
  if (onlyText) return false;

  string nli = "\n" + new string('\t', level);

  foreach (var c in children) {
    node.InsertBefore(node.OwnerDocument.CreateTextNode(nli), c);
    if (c.NodeType == HtmlNodeType.Element) {
      if (c.HasChildNodes) {
        if (beautify(c, level + 1)) {
          c.AppendChild(c.OwnerDocument.CreateTextNode(nli));
        }
      }
    }
  }
  return true;
}

As you might see, the code is pretty hacky. But, it works for me. Maybe, it also works for you, or it can be a starting point.