Quick opcode filter for M&B mod wiki

Add a small input box in the operations and triggers pages to easily look up, find and filter specific Mount&Blade 1.011 and Warband module system opcodes and triggers.
目前為 2025-07-21 提交的版本，檢視最新版本。
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// ==UserScript==
// @name        Quick opcode filter for M&B mod wiki
// @description Add a small input box in the operations and triggers pages to easily look up, find and filter specific Mount&Blade 1.011 and Warband module system opcodes and triggers.
// @namespace   https://gf.qytechs.cn/users/4813
//
// @match       https://mbcommands.fandom.com/wiki/Operations
// @match       https://antifandom.com/mbcommands/wiki/Operations
//
// @match       https://mbcommands.fandom.com/wiki/Triggers
// @match       https://antifandom.com/mbcommands/wiki/Triggers
//
// @icon        https://static.wikia.nocookie.net/mount26blade20mooders20reference/images/4/4a/Site-favicon.ico/revision/latest
// @version     2025.07.21.3
// @author      Swyter
// @license     GNU GPLv3
// @grant       none
// @run-at      document-start
// ==/UserScript==

/* swy: append our new filter input box HTML element into the page */
search=document.createElement("input")
search.setAttribute("id", "opfilter")
search.setAttribute("type", "text")
search.setAttribute("spellcheck", "false")
search.setAttribute("placeholder", "Filter operations or triggers... :)")
document.documentElement.appendChild(search)

/* swy: append a new inline CSS stylesheet for our stuff into the page,
        before it loads completely to avoid flicker */
style=document.createElement("style")
style.textContent = `
  .operation[hidden],
  .operation[hidden] + dl,
  body[opfilter] .mw-parser-output p:not(.operation),
  body[opfilter] .mw-parser-output pre,
  body[opfilter] .mw-parser-output ol,
  body[opfilter] .mw-parser-output ul,
  body[opfilter] .mw-parser-output *:not(.operation) + dl,
  body[opfilter] .mw-parser-output div,
  body[opfilter] .mw-parser-output table,
  aside.page__right-rail,                    /* swy: get rid of the useless right block cruft from Fandom; usually only shows ads */
  div.main-page-box:has(a[href*=greasyfork]) /* swy: get rid of the tip mentioning this userscript if it's already installed */
  {
    display: none; /* swy: hide all the flowing text, explanations and tables while in filter mode */
  }

  input#opfilter
  {
    position: fixed;
    width: calc(100% - (20% + 20%)); /* swy: center it leaving 20% of page width at either side */
    left: calc(20%);
    bottom: 20px;
    box-shadow: 0 0 4px black, 0 0 40px black, 0 0 100px black;
    opacity: .8;
    z-index: 300; /* swy: make it appear when outside of the HTML <body>, the input element gets added to the HTML root */
    font-size: x-large;
    border: none;
    border-radius: 2px;
    padding: 3px;
  }

  input#opfilter:not(:focus)
  {
    opacity: .35; /* swy: fade it out when the input box is not focused */
  }

  * { scroll-margin-top: 100px; } /* swy: fix scrolling to an element but getting hidden by the top bar: https://stackoverflow.com/a/59253905/674685 */
`
document.documentElement.appendChild(style)

/* swy: on every new typed input do this */
search.oninput=function(e)
{
  /* swy: hide all the non-operation stuff (text, explanations, ...) when using the search box; make it clean */
  document.body.setAttribute("opfilter", "true")

  /* swy: get a list of every operation, get the search text the user typed, split into words */
  operations  = document.querySelectorAll(".operation");
  search_text = e.target.value

  search_elems = search_text.toLowerCase().split(/\s+/)

  /* swy: go across every operation in the page and show it, if it contains
          *every* word in the filter, or just hide it otherwise */
  for (var op of operations)
  {
    matches_all = true

    for (var el of search_elems)
      if (!op.id.includes(el))
        matches_all = false

    if (matches_all)
      op.removeAttribute("hidden")
    else
      op.setAttribute("hidden", "true")
  }

  /* swy: hide empty headers (with no operation block hanging from it) */
  wiki_content = document.querySelector(".mw-parser-output")
  cur_elem     = wiki_content.lastElementChild
  header_regex = /H[0-9]/
  parent_ctx = 0
  ctx = 0
  do
  {
    cur_elem_visible = !!cur_elem.offsetParent; /* swy: https://stackoverflow.com/a/21696585/674685 */

    //cur_elem_visible && console.log("loop", cur_elem, cur_elem_visible, "parent_ctx", parent_ctx, "ctx", ctx)

    if (cur_elem.nodeName.match(header_regex))
    {
      h_number = +cur_elem.nodeName[1] /* swy: 'h3' -> 3 */

      //console.log("header", cur_elem, cur_elem.textContent, "parent_ctx", parent_ctx, "ctx", ctx, "h_number", h_number)

      if ((ctx > 0 && h_number > 2) || (parent_ctx > 0 && h_number == 2))
        cur_elem.removeAttribute("hidden")
      else
        cur_elem.setAttribute("hidden", "true")

      if (h_number == 2)
        parent_ctx = 0

      ctx = 0

      //console.log("header", cur_elem, cur_elem.textContent, "parent_ctx", parent_ctx, "ctx", ctx, "h_number", h_number)
    }
    else if(cur_elem_visible)
    {
      ctx++
      parent_ctx++
      //console.log("other", cur_elem, ctx)
    }
  } while (cur_elem = cur_elem.previousElementSibling)

  /* swy: scroll into the first (visible) operation that matches our search, if any */
  if (first_visible_op = document.querySelector('.operation:not([hidden])'))
      first_visible_op.scrollIntoView();
}
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