Bounded Bikeshed

BoundedBikeshed

Focus on the topic instead of the bike shed.
当前为 2023-08-16 提交的版本，查看最新版本。
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// ==UserScript==
// @name        BoundedBikeshed
// @description Focus on the topic instead of the bike shed.
// @author      Tim Kuijsten
// @license     ISC
// @namespace   netsend.nl
// @supportURL  https://github.com/timkuijsten/BoundedBikeshed
// @match       https://news.ycombinator.com/item?id=*
// @match       https://lobste.rs/s/*
// @match       https://tweakers.net/*/*
// @grant       none
// @version     0.3.0
// ==/UserScript==

"use strict";

// ISC license

// Copyright (C) 2023 Tim Kuijsten
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
// PERFORMANCE OF THIS SOFTWARE.

(function() {
  var activatethresh = 10;

  // returns the number of descendants of "comment"
  function hidesubcommentsLobsters(comment) {
    var descendants = 0;

    // first li.comments_subtree is the reaction form and not an existing comment
    if (comment.querySelector(".details") == null) {
      return descendants;
    }

    var subcomments = comment.querySelectorAll(":scope > ol.comments > li.comments_subtree");
    if (subcomments.length == 0) {
      return descendants;
    }

    subcomments.forEach(function(subcomment) {
      descendants++;
      descendants += hidesubcommentsLobsters(subcomment);
    });

    var el = document.createElement("span");
    el.textContent = "| ";
    var subel = document.createElement("span");
    subel.style.cursor = "pointer";

    var title = "";
    if (subcomments.length > 1) {
      title = subcomments.length + " comments";
    } else {
      title = "1 comment";
    }

    title += " (+" + (descendants - subcomments.length) + ")";
    subel.textContent = "comments";
    subel.title = title;

    el.appendChild(subel);
    comment.querySelector(".details .byline").appendChild(el);

    var subcommentcontainer = comment.querySelector(":scope > ol.comments");

    (function(scc) {
      var visible = false;
      subel.addEventListener("click", function() {
        if (visible) {
          scc.remove();
        } else {
          comment.appendChild(scc);
        }
        visible = !visible;
      });
    })(subcommentcontainer);

    subcommentcontainer.remove();

    return descendants;
  }

  // returns the number of descendants of "comment"
  function hidesubcommentsTweakers(comment) {
    var descendants = 0;
    var subcomments = comment.querySelectorAll(":scope > twk-reaction");
    if (subcomments.length == 0) {
      return descendants;
    }

    subcomments.forEach(function(subcomment) {
      descendants++;
      descendants += hidesubcommentsTweakers(subcomment);
    });

    var el = document.createElement("a");
    el.style.cursor = "pointer";
    el.style.marginRight = "12px";

    var title = "";
    if (subcomments.length > 1) {
      title = subcomments.length + " reacties";
    } else if (subcomments.length == 1) {
      title = "1 reactie";
    }
    if (subcomments.length > 0) {
      title += " (+" + (descendants - subcomments.length) + ")";
      el.textContent = "Reacties";
      el.title = title;
    }

    var footer = comment.querySelector(".reactieFooter");
    footer.insertBefore(el, footer.querySelector("a"));

    var subcommentcontainer = comment;

    (function togglesub(scc) {
      var visible = false;
      el.addEventListener("click", function() {
        if (visible) {
          scc.querySelectorAll(":scope > twk-reaction").forEach(function(el) {
            el.style.display = "none";
          });
        } else {
          scc.querySelectorAll(":scope > twk-reaction").forEach(function(el) {
            el.style.display = "";
          });
        }
        visible = !visible;
      });
    })(subcommentcontainer);

    subcommentcontainer.querySelectorAll(":scope > twk-reaction").forEach(function(el) {
      el.style.display = "none";
    });

    return descendants;
  }

  function HNaddbutton(comment, subgroup, nrdescendants) {
    var el = document.createElement("span");
    el.textContent = "| ";
    var subel = document.createElement("span");
    subel.style.cursor = "pointer";
    var title = "";
    if (subgroup.length > 1) {
      title = subgroup.length + " subcomments";
    } else if (subgroup.length == 1) {
      title = "1 subcomment";
    }
    title += " (+" + (nrdescendants - subgroup.length) + ")";
    subel.textContent += "comments";
    subel.title = title;
    el.append(subel);
    comment.querySelector("span.comhead").append(el);
    (function togglesub(sg) {
      var visible = false;
      subel.addEventListener("click", function() {
        if (visible) {
          sg.forEach(function(el) {
            el.classList.add("noshow");
          });
        } else {
          sg.forEach(function(el) {
            el.classList.remove("noshow");
          });
        }
        visible = !visible;
      });
    })(subgroup);
  }
  // returns the number of descendants of "comment"
  function hidesubcommentsHN(comment) {
    var indent = Number(comment.querySelector("td.ind").getAttribute("indent"));
    var curindent;
    var nextcomment = comment.nextElementSibling;
    var subgroup = [];
    var descendants = 0;
    while (nextcomment) {
      // if not a descendant, return
      // if not a child, recurse
      // else add to group of childs
      var tdind = nextcomment.querySelector("td.ind");
      if (tdind == null) {
        if (subgroup.length > 0) {
          HNaddbutton(comment, subgroup, descendants);
        }
        return descendants;
      }
      curindent = Number(tdind.getAttribute("indent"));
      if (curindent <= indent) {
        if (subgroup.length > 0) {
          HNaddbutton(comment, subgroup, descendants);
        }
        return descendants;
      }

      // curindent > indent

      nextcomment.classList.add("noshow");

      if (curindent > indent + 1) {
        var r = hidesubcommentsHN(nextcomment.previousElementSibling);
        while (r--) {
          nextcomment = nextcomment.nextElementSibling;
          descendants++;
        }
        continue;
      }

      // curindent == indent + 1
      subgroup.push(nextcomment);

      nextcomment = nextcomment.nextElementSibling;
      descendants++;
    }
    if (subgroup.length > 0) {
      HNaddbutton(comment, subgroup, descendants);
    }
    return descendants;
  }

  var allcomments;
  switch (window.location.hostname) {
  case "news.ycombinator.com":
    allcomments = document.querySelectorAll("table.comment-tree tr.comtr");
    if (allcomments.length > activatethresh) {
      document.querySelectorAll("table.comment-tree tr.comtr").forEach(function(comment) {
        if (comment.querySelector("td[indent='0']")) {
          hidesubcommentsHN(comment);
        }
      });
    }
    break;
  case "lobste.rs":
    allcomments = document.querySelectorAll("li.comments_subtree");
    // first li.comments_subtree is the reaction form and not an existing comment
    if (allcomments.length - 1 > activatethresh) {
      document.querySelectorAll("body > * > ol.comments > li.comments_subtree").forEach(hidesubcommentsLobsters);
    }
    break;
  case "tweakers.net":
    allcomments = document.querySelectorAll("twk-reaction");
    if (allcomments.length > activatethresh) {
      document.querySelectorAll("#reactieContainer > twk-reaction").forEach(hidesubcommentsTweakers);
    }
    break;
  }
})();
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