---

author: Chenzhu-Xie name: Library/xczphysics/CONFIG/Paste_as/Cursor_Anchor tags: meta/library

pageDecoration.prefix: "📎 "

#forward #object

Bi-directional Linking System @ Cursor

1. cross references #community #silverbullet
2. abc accurate bi directional cursor level linking system #community #silverbullet
3. issues #github
4. issues #github

here we go

filterBox 5.2

​	, (<)	. (>)
Ctrl-	[prompt|(select)C](prompt|(select)C) L	[picker|(select)C](picker|(select)C) L
Ctrl-Alt-	[pickerC|(select)](pickerC|(select)) L(A)	[picker|(paste)C](picker|(paste)C) No Clip
Ctrl-Shift-	[select (or prompt)|C](select (or prompt)|C) L	[paste (or picker)|(select)C](paste (or picker)|(select)C) L
Alt-	GOTO Flabel	GOTO Blabel
Alt-M	Cursor: Copy Nearest Flabel

aslkjwer⚓|🔙\({backRefs("aslkjwer")} | [aslkjwer⚓|🧑‍🤝‍🧑1](aslkjwer⚓|🧑‍🤝‍🧑1)\){forthRef("aslkjwer")}\({backRefs_noSelf("aslkjwer",1)} | [aslkjwer⚓|🧑‍🤝‍🧑2](aslkjwer⚓|🧑‍🤝‍🧑2)\){forthRef("aslkjwer")}\({backRefs_noSelf("aslkjwer",2)} | [aslkjwer⚓|🧑‍🤝‍🧑3](aslkjwer⚓|🧑‍🤝‍🧑3)\){forthRef("aslkjwer")}${backRefs_noSelf("aslkjwer",3)}

test⚓|qwer🔙\({backRefs("test")} | [test⚓|emm🧑‍🤝‍🧑1](test⚓|emm🧑‍🤝‍🧑1)\){forthRef("test")}\({backRefs_noSelf("test",1)} | [test⚓|haha🧑‍🤝‍🧑2](test⚓|haha🧑‍🤝‍🧑2)\){forthRef("test")}${backRefs_noSelf("test",2)}

1. Tag Page #silverbullet

function getSelectedText()
  local sel = editor.getSelection()
  if not sel or sel.from == sel.to then return nil end
  local text = editor.getText()
  return text:sub(sel.from + 1, sel.to)
end

function setSelectedText(newText)
  local sel = editor.getSelection()
  if not sel or sel.from == sel.to then return nil end
  editor.replaceRange(sel.from, sel.to, newText)
end

function usrPrompt(hinText, iniText)
  local iniText = iniText or ""
  local input = editor.prompt(hinText, iniText)
  if not input then
    editor.flashNotification("Cancelled", "warn")
  end
  return input
end

function pickerBox_labelName(hinText, iniText)
  local iniText = iniText or ""
  local allLabels = query[
    from index.tag "link"
    where toPage and toPage:find(anchorSymbol, 1, true) and alias:find(suffixBlabel, 1, true)
    order by _.toPage
  ](
    from index.tag "link"
    where toPage and toPage:find(anchorSymbol, 1, true) and alias:find(suffixBlabel, 1, true)
    order by _.toPage
  )
  local labels = query[from allLabels select {name = _.toPage:gsub(anchorSymbol, ""), description = _.page .. "@" .. _.pos}](from allLabels select {name = _.toPage:gsub(anchorSymbol, ""), description = _.page .. "@" .. _.pos})
  local sel = editor.filterBox("🔌 Insert", labels, hinText, iniText)
  if sel then return sel.name end
  if not sel then
    editor.flashNotification("Cancelled", "warn")
  end
  return nil
end

function pickerBox_FlabelRef(hinText, iniText)
  local iniText = iniText or ""
  local allFlabels = query[
    from index.tag "link"
    where toPage and toPage:find(anchorSymbol, 1, true) and alias:find(suffixBlabel, 1, true)
    order by _.toPage
  ](
    from index.tag "link"
    where toPage and toPage:find(anchorSymbol, 1, true) and alias:find(suffixBlabel, 1, true)
    order by _.toPage
  )
  local Flabels = query[from allFlabels select {name = _.toPage:gsub(anchorSymbol, "") .. suffixBlabel .. _.alias:gsub(suffixBlabel, ""), description = _.page .. "@" .. _.pos, Flabel = _.toPage:gsub(anchorSymbol, "")}](from allFlabels select {name = _.toPage:gsub(anchorSymbol, "") .. suffixBlabel .. _.alias:gsub(suffixBlabel, ""), description = _.page .. "@" .. _.pos, Flabel = _.toPage:gsub(anchorSymbol, "")})
  local sel = editor.filterBox("🔎 Flabel", Flabels, hinText, iniText)
  if sel then return sel.description, sel.Flabel end
  if not sel then
    editor.flashNotification("Cancelled", "warn")
  end
  return nil, nil
end

function pickerBox_BlabelRef(hinText, iniText)
  local iniText = iniText or ""
  local allBlabels = query[
    from index.tag "link"
    where toPage and toPage:find(anchorSymbol, 1, true) and alias:find(suffixFlabel, 1, true)
    order by _.toPage .. alias
  ](
    from index.tag "link"
    where toPage and toPage:find(anchorSymbol, 1, true) and alias:find(suffixFlabel, 1, true)
    order by _.toPage .. alias
  )
  local Blabels = query[from allBlabels select {name = _.toPage:gsub(anchorSymbol, "") .. siblings .. _.alias, description = _.page .. "@" .. _.pos, Flabel = _.toPage:gsub(anchorSymbol, "")}](from allBlabels select {name = _.toPage:gsub(anchorSymbol, "") .. siblings .. _.alias, description = _.page .. "@" .. _.pos, Flabel = _.toPage:gsub(anchorSymbol, "")})
  local sel = editor.filterBox("🔎 Blabel", Blabels, hinText, iniText)
  if sel then return sel.description, sel.Flabel end
  if not sel then
    editor.flashNotification("Cancelled", "warn")
  end
  return nil, nil
end

command.define {
  name = "Go to: Forth Anchor",
  key = "Alt-,",
  run = function()
    local FlabelRef, Flabel = pickerBox_FlabelRef('Select: Flabel (to GOTO)', js.window.navigator.clipboard.readText())
    if not FlabelRef then return end
    -- editor.flashNotification(FlabelRef)
    editor.navigate(FlabelRef)
    -- local pos = tonumber(FlabelRef:match("@(.*)$"))
    -- if pos then
    --     editor.moveCursor(pos, true)
    -- end
    editor.invokeCommand("Navigate: Center Cursor")
    editor.copyToClipboard(Flabel)
  end
}

command.define {
  name = "Go to: Back Anchor",
  key = "Alt-.",
  run = function()
    local BlabelRef, Flabel = pickerBox_BlabelRef('GOTO: Blabel', js.window.navigator.clipboard.readText())
    if not BlabelRef then return end
    -- editor.flashNotification(BlabelRef)
    editor.navigate(BlabelRef)
    -- local pos = tonumber(BlabelRef:match("@(.*)$"))
    -- if pos then
    --     editor.moveCursor(pos, true)
    -- end
    editor.invokeCommand("Navigate: Center Cursor")
    editor.copyToClipboard(Flabel)
  end
}

local anchorSymbol = "⚓"
local suffixFlabel = "🧑‍🤝‍🧑"
local suffixBlabel = "🔙"
local siblings = "➡️"

-- =========== Forth Anchor + Back Refs ==================

local function tableBack(Flabel)
  local aspiringPage = Flabel .. anchorSymbol
  return query[
    from index.tag "link"
    where toPage == aspiringPage and alias:find(suffixFlabel, 1, true)
    order by _.thBlabel
    select {ref=_.ref, thBlabel=_.thBlabel}
  ](
    from index.tag "link"
    where toPage == aspiringPage and alias:find(suffixFlabel, 1, true)
    order by _.thBlabel
    select {ref=_.ref, thBlabel=_.thBlabel}
  )
end

function backRefs(Flabel)
  local str = template.each(tableBack(Flabel), template.new[==[​[${_.ref}|${_.thBlabel}](${_.ref}|${_.thBlabel})​]==])
  if #str == 0 then return "​" end
  return str
end

command.define {
  name = "Insert: ForthAnchor + BackRefs (sel: alias)",
  key = "Ctrl-,",
  run = function()
    local alias = getSelectedText() or ""
    local Flabel = usrPrompt('Enter: label (to be Referred)', '')
    if not Flabel then return end
    local aspiringPage = Flabel .. anchorSymbol
    local forthAnchor = "[" .. aspiringPage .. "||^|" .. suffixBlabel .. "](" .. aspiringPage .. "||^|" .. suffixBlabel .. ")"
    local backRefs = '${backRefs("' .. Flabel .. '")}'
    local fullText = forthAnchor .. backRefs
    if alias and alias ~= "" then setSelectedText("") end
    editor.insertAtPos(fullText, editor.getCursor(), true)
    editor.copyToClipboard(Flabel)
    editor.insertAtCursor(alias, false) -- scrollIntoView?
    editor.invokeCommand("Widgets: Refresh All")
  end
}

command.define {
  name = "Insert: ForthAnchor + BackRefs (pick: label)",
  key = "Ctrl-Alt-,",
  run = function()
    local alias = getSelectedText() or ""
    local Flabel = pickerBox_labelName('Enter: label (to be Referred)', js.window.navigator.clipboard.readText())
    if not Flabel then return end
    Flabel = usrPrompt('Enter: label (to be Referred)', Flabel)
    if not Flabel then return end
    local forthAnchor = "[" .. Flabel .. "|^|" .. anchorSymbol .. "|" .. alias .. suffixBlabel .. "](" .. Flabel .. "|^|" .. anchorSymbol .. "|" .. alias .. suffixBlabel .. ")"
    local backRefs = '${backRefs("' .. Flabel .. '")}'
    local fullText = forthAnchor .. backRefs
    editor.copyToClipboard(Flabel)
    if alias and alias ~= "" then
      setSelectedText("")
      editor.copyToClipboard(alias)
    end
    editor.insertAtPos(fullText, editor.getCursor(), true)
    -- editor.copyToClipboard(Flabel)
    -- editor.insertAtCursor(alias, false) -- scrollIntoView?
    editor.invokeCommand("Widgets: Refresh All")
  end
}

command.define {
  name = "Insert: ForthAnchor + BackRefs (sel: label)",
  key = "Ctrl-Shift-,",
  run = function()
    local iniText = getSelectedText() or ""
    local Flabel
    if iniText and iniText ~= "" then
      Flabel = iniText
    else
      Flabel = usrPrompt('Enter: label (to be Referred)', '')
    end
    if not Flabel then return end
    local aspiringPage = Flabel .. anchorSymbol
    local forthAnchor = "[" .. aspiringPage .. "||^|" .. suffixBlabel .. "](" .. aspiringPage .. "||^|" .. suffixBlabel .. ")"
    local backRefs = '${backRefs("' .. Flabel .. '")}'
    local fullText = forthAnchor .. backRefs
    if iniText and iniText ~= "" then setSelectedText("") end
    editor.insertAtPos(fullText, editor.getCursor(), true)
    editor.copyToClipboard(Flabel)
    editor.invokeCommand("Widgets: Refresh All")
  end
}

-- =========== Back Anchor + Forth Ref ==================

local function tableBack_noSelf(Flabel, thBlabelNum)
  local aspiringPage = Flabel .. anchorSymbol
  return query[
    from index.tag "link"
    where toPage == aspiringPage and alias:find(suffixFlabel, 1, true) and thBlabelNum ~= _.thBlabel
    order by _.thBlabel
    select {ref=_.ref, thBlabel=_.thBlabel}
  ](
    from index.tag "link"
    where toPage == aspiringPage and alias:find(suffixFlabel, 1, true) and thBlabelNum ~= _.thBlabel
    order by _.thBlabel
    select {ref=_.ref, thBlabel=_.thBlabel}
  )
end

function backRefs_noSelf(Flabel, thBlabelNum)
  local str = template.each(tableBack_noSelf(Flabel, thBlabelNum), template.new[==[​[${_.ref}|${_.thBlabel}](${_.ref}|${_.thBlabel})​]==])
  if #str == 0 then return "​" end
  return str
end

local function tableForth(Flabel)
  local aspiringPage = Flabel .. anchorSymbol
  return query[
    from index.tag "link"
    where toPage == aspiringPage and alias:find(suffixBlabel, 1, true)
    select {ref=_.ref}
  ](
    from index.tag "link"
    where toPage == aspiringPage and alias:find(suffixBlabel, 1, true)
    select {ref=_.ref}
  )
end

function forthRef(Flabel)
  local str = template.each(tableForth(Flabel), template.new("[${_.ref}|​" .. siblings .. "​](${_.ref}|​" .. siblings .. "​)"))
  if #str == 0 then return "​" end
  return str
end

command.define {
  name = "Insert: BackAnchor + ForthRef (label: pick)",
  key = "Ctrl-.",
  run = function()
    local alias = getSelectedText() or ""
    local Flabel = pickerBox_labelName('Pick: label (to Compose)', js.window.navigator.clipboard.readText())
    if not Flabel then return end
    local thBlabelNum = #tableBack(Flabel) + 1
    local aspiringPage = Flabel .. anchorSymbol
    local backAnchor = "[" .. aspiringPage .. "||^|" .. suffixFlabel .. thBlabelNum .. "](" .. aspiringPage .. "||^|" .. suffixFlabel .. thBlabelNum .. ")"
    local forthRef = '${forthRef("' .. Flabel .. '")}'
    local backRefs_noSelf = '${backRefs_noSelf("' .. Flabel .. '",' .. thBlabelNum .. ')}'
    local fullText = backAnchor .. forthRef .. backRefs_noSelf
    if alias and alias ~= "" then setSelectedText("") end
    editor.insertAtPos(fullText, editor.getCursor(), true)
    editor.copyToClipboard(Flabel)
    editor.insertAtCursor(alias, false) -- scrollIntoView?
    editor.invokeCommand("Widgets: Refresh All")
  end
}

command.define {
  name = "Insert: BackAnchor + ForthRef (alias: paste)",
  key = "Ctrl-Alt-.",
  run = function()
    local iniText = getSelectedText() or ""
    local alias = js.window.navigator.clipboard.readText()
    local Flabel = pickerBox_labelName('Pick: label (to Compose)', iniText)
    if not Flabel then return end
    local thBlabelNum = #tableBack(Flabel) + 1
    local aspiringPage = Flabel .. anchorSymbol
    local backAnchor = "[" .. aspiringPage .. "||^|" .. suffixFlabel .. thBlabelNum .. "](" .. aspiringPage .. "||^|" .. suffixFlabel .. thBlabelNum .. ")"
    local forthRef = '${forthRef("' .. Flabel .. '")}'
    local backRefs_noSelf = '${backRefs_noSelf("' .. Flabel .. '",' .. thBlabelNum .. ')}'
    local fullText = backAnchor .. forthRef .. backRefs_noSelf
    if iniText and iniText ~= "" then setSelectedText("") end
    editor.insertAtPos(fullText, editor.getCursor(), true)
    -- editor.copyToClipboard(Flabel)
    editor.insertAtCursor(alias, false) -- scrollIntoView?
    editor.invokeCommand("Widgets: Refresh All")
  end
}

command.define {
  name = "Insert: BackAnchor + ForthRef (label: paste)",
  key = "Ctrl-Shift-.",
  run = function()
    local alias = getSelectedText() or ""
    local iniText = js.window.navigator.clipboard.readText()
    local Flabel
    if iniText and iniText ~= "" then
      Flabel = iniText
    else
      Flabel = pickerBox_labelName('Pick: label (to Build)', '')
    end
    if not Flabel then return end
    local thBlabelNum = #tableBack(Flabel) + 1
    local aspiringPage = Flabel .. anchorSymbol
    local backAnchor = "[" .. aspiringPage .. "||^|" .. suffixFlabel .. thBlabelNum .. "](" .. aspiringPage .. "||^|" .. suffixFlabel .. thBlabelNum .. ")"
    local forthRef = '${forthRef("' .. Flabel .. '")}'
    local backRefs_noSelf = '${backRefs_noSelf("' .. Flabel .. '",' .. thBlabelNum .. ')}'
    local fullText = backAnchor .. forthRef .. backRefs_noSelf
    if alias and alias ~= "" then setSelectedText("") end
    editor.insertAtPos(fullText, editor.getCursor(), true)
    editor.copyToClipboard(Flabel)
    editor.insertAtCursor(alias, false) -- scrollIntoView?
    editor.invokeCommand("Widgets: Refresh All")
  end
}

index.defineTag {
  name = "link",
  metatable = {
    __index = function(self, attr)
      if attr == "thBlabel" then
        return tonumber(string.match(self.alias, suffixFlabel .. "([0-9]+)"))
      end
    end
  }
}

-- =========== Magneto Copy: Nearest Label ==================

function SelectiondistanceToCursor(startPos, endPos, cursorPos)
  if cursorPos < startPos then return startPos - cursorPos end
  if cursorPos > endPos   then return cursorPos - endPos   end
  return 0
end

function getCursorPos()
  local cur = editor.getCursor() 
  local cursor_pos = (type(cur) == "table" and cur.pos) or cur
  return cursor_pos
end

function findNearestLabel()
  local pageText = editor.getText()
  local curPos = getCursorPos()

  local pattern = "%[%[^\n%](^\n%)+" .. anchorSymbol .. "|"
  local nearest = nil

  local init = 1
  local ok, err = pcall(function()
    while true do
      local s, e = pageText:find(pattern, init)
      if not s then break end
      
      local dist = SelectiondistanceToCursor(s, e, curPos)
      if not nearest or dist < nearest.dist then
        nearest = { start = s, stop = e, text = pageText:sub(s, e), dist = dist }
      end
      
      init = (e >= init) and (e + 1) or (init + 1)
    end
  end)

  return nearest
end

command.define{
  name = "Cursor: Copy Nearest Label",
  description = "Copy the raw page name of the nearest Wiki Link",
  key = "Alt-m",
  run = function()
    local match = findNearestLabel()
    
    if not match then
      editor.flashNotification("No Label found.")
      return
    end

    local inner = match.text:sub(3, -3)
    editor.copyToClipboard(inner)
    editor.flashNotification(inner .. anchorSymbol)
  end
}

Less Index Overhead 4.2

==Update== 1. no text display if no forward-label/backrefs/siblings found 2. switch emoji 🧑‍🤝‍🧑,➡️ 3. add auto reindex alt+q (refresh widgets) 4. 4 commands for different input - Ctrl-<> for manual input - Ctrl-Shift-<> for quick input

​	Ctrl-	Ctrl-Shift-
, (<)	[prompt|(select)C](prompt|(select)C), copy:L	[select (or prompt)|C](select (or prompt)|C), copy:L
. (>)	[prompt|(select)C](prompt|(select)C), copy:L	[paste (or prompt)|(select)C](paste (or prompt)|(select)C), copy:L

${query from index.tag "link" where toPage and toPage:find("⚓", 1, true) and alias:find("🔙", 1, true) order by _.ref and alias:find("🔙", 1, true) order by _.ref )}

function getSelectedText()
  local sel = editor.getSelection()
  if not sel or sel.from == sel.to then return nil end
  local text = editor.getText()
  return text:sub(sel.from + 1, sel.to)
end

function setSelectedText(newText)
  local sel = editor.getSelection()
  if not sel or sel.from == sel.to then return nil end
  editor.replaceRange(sel.from, sel.to, newText)
end

function usrPrompt(hinText, iniText)
  local iniText = iniText or ""
  local input = editor.prompt(hinText, iniText)
  if not input then
    editor.flashNotification("Cancelled", "warn")
  end
  return input
end

local anchorSymbol = "⚓"
local suffixFlabel = "🧑‍🤝‍🧑"
local suffixBlabel = "🔙"
local siblings = "➡️"

-- =========== Forth Anchor + Back Refs ==================

local function tableBack(Flabel)
  local aspiringPage = Flabel .. anchorSymbol
  return query[
    from index.tag "link"
    where toPage == aspiringPage and alias:find(suffixFlabel, 1, true)
    order by _.thBlabel
    select {ref=_.ref, thBlabel=_.thBlabel}
  ](
    from index.tag "link"
    where toPage == aspiringPage and alias:find(suffixFlabel, 1, true)
    order by _.thBlabel
    select {ref=_.ref, thBlabel=_.thBlabel}
  )
end

function backRefs(Flabel)
  local str = template.each(tableBack(Flabel), template.new[==[​[${_.ref}|${_.thBlabel}](${_.ref}|${_.thBlabel})​]==])
  if #str == 0 then return "​" end
  return str
end

command.define {
  name = "Insert: ForthAnchor + BackRefs (sel: label)",
  key = "Ctrl-Shift-,",
  run = function()
    local iniText = getSelectedText() or ""
    local Flabel
    if iniText and iniText ~= "" then
      Flabel = iniText
    else
      Flabel = usrPrompt('Enter: label (to be Referred)', '')
    end
    if not Flabel then return end
    local aspiringPage = Flabel .. anchorSymbol
    local forthAnchor = "[" .. aspiringPage .. "||^|" .. suffixBlabel .. "](" .. aspiringPage .. "||^|" .. suffixBlabel .. ")"
    local backRefs = '${backRefs("' .. Flabel .. '")}'
    local fullText = forthAnchor .. backRefs
    if iniText and iniText ~= "" then setSelectedText("") end
    editor.insertAtPos(fullText, editor.getCursor(), true)
    editor.copyToClipboard(Flabel)
    editor.invokeCommand("Widgets: Refresh All")
  end
}

command.define {
  name = "Insert: ForthAnchor + BackRefs (sel: alias)",
  key = "Ctrl-,",
  run = function()
    local alias = getSelectedText() or ""
    local Flabel = usrPrompt('Enter: label (to be Referred)', '')
    if not Flabel then return end
    local aspiringPage = Flabel .. anchorSymbol
    local forthAnchor = "[" .. aspiringPage .. "||^|" .. suffixBlabel .. "](" .. aspiringPage .. "||^|" .. suffixBlabel .. ")"
    local backRefs = '${backRefs("' .. Flabel .. '")}'
    local fullText = forthAnchor .. backRefs
    if alias and alias ~= "" then setSelectedText("") end
    editor.insertAtPos(fullText, editor.getCursor(), true)
    editor.copyToClipboard(Flabel)
    editor.insertAtCursor(alias, false) -- scrollIntoView?
    editor.invokeCommand("Widgets: Refresh All")
  end
}

-- =========== Back Anchor + Forth Ref ==================

local function tableBack_noSelf(Flabel, thBlabelNum)
  local aspiringPage = Flabel .. anchorSymbol
  return query[
    from index.tag "link"
    where toPage == aspiringPage and alias:find(suffixFlabel, 1, true) and thBlabelNum ~= _.thBlabel
    order by _.thBlabel
    select {ref=_.ref, thBlabel=_.thBlabel}
  ](
    from index.tag "link"
    where toPage == aspiringPage and alias:find(suffixFlabel, 1, true) and thBlabelNum ~= _.thBlabel
    order by _.thBlabel
    select {ref=_.ref, thBlabel=_.thBlabel}
  )
end

function backRefs_noSelf(Flabel, thBlabelNum)
  local str = template.each(tableBack_noSelf(Flabel, thBlabelNum), template.new[==[​[${_.ref}|${_.thBlabel}](${_.ref}|${_.thBlabel})​]==])
  if #str == 0 then return "​" end
  return str
end

local function tableForth(Flabel)
  local aspiringPage = Flabel .. anchorSymbol
  return query[
    from index.tag "link"
    where toPage == aspiringPage and alias:find(suffixBlabel, 1, true)
    select {ref=_.ref}
  ](
    from index.tag "link"
    where toPage == aspiringPage and alias:find(suffixBlabel, 1, true)
    select {ref=_.ref}
  )
end

function forthRef(Flabel)
  local str = template.each(tableForth(Flabel), template.new("[${_.ref}|​" .. siblings .. "​](${_.ref}|​" .. siblings .. "​)"))
  if #str == 0 then return "​" end
  return str
end

command.define {
  name = "Insert: BackAnchor + ForthRef (label: input)",
  key = "Ctrl-.",
  run = function()
    local alias = getSelectedText() or ""
    local Flabel = usrPrompt('Jump to: label', '')
    if not Flabel then return end
    local thBlabelNum = #tableBack(Flabel) + 1
    local aspiringPage = Flabel .. anchorSymbol
    local backAnchor = "[" .. aspiringPage .. "||^|" .. suffixFlabel .. thBlabelNum .. "](" .. aspiringPage .. "||^|" .. suffixFlabel .. thBlabelNum .. ")"
    local forthRef = '${forthRef("' .. Flabel .. '")}'
    local backRefs_noSelf = '${backRefs_noSelf("' .. Flabel .. '",' .. thBlabelNum .. ')}'
    local fullText = backAnchor .. forthRef .. backRefs_noSelf
    if alias and alias ~= "" then setSelectedText("") end
    editor.insertAtPos(fullText, editor.getCursor(), true)
    editor.copyToClipboard(Flabel)
    editor.insertAtCursor(alias, false) -- scrollIntoView?
    editor.invokeCommand("Widgets: Refresh All")
  end
}

command.define {
  name = "Insert: BackAnchor + ForthRef (label: clip)",
  key = "Ctrl-Shift-.",
  run = function()
    local alias = getSelectedText() or ""
    local iniText = js.window.navigator.clipboard.readText()
    local Flabel
    if iniText and iniText ~= "" then
      Flabel = iniText
    else
      Flabel = usrPrompt('Jump to: label', '')
    end
    if not Flabel then return end
    local thBlabelNum = #tableBack(Flabel) + 1
    local aspiringPage = Flabel .. anchorSymbol
    local backAnchor = "[" .. aspiringPage .. "||^|" .. suffixFlabel .. thBlabelNum .. "](" .. aspiringPage .. "||^|" .. suffixFlabel .. thBlabelNum .. ")"
    local forthRef = '${forthRef("' .. Flabel .. '")}'
    local backRefs_noSelf = '${backRefs_noSelf("' .. Flabel .. '",' .. thBlabelNum .. ')}'
    local fullText = backAnchor .. forthRef .. backRefs_noSelf
    if alias and alias ~= "" then setSelectedText("") end
    editor.insertAtPos(fullText, editor.getCursor(), true)
    editor.copyToClipboard(Flabel)
    editor.insertAtCursor(alias, false) -- scrollIntoView?
    editor.invokeCommand("Widgets: Refresh All")
  end
}

index.defineTag {
  name = "link",
  metatable = {
    __index = function(self, attr)
      if attr == "thBlabel" then
        return tonumber(string.match(self.alias, suffixFlabel .. "([0-9]+)"))
      end
    end
  }
}

backup 3.2

oiuweqr➡️|🔙\({backRefs("oiuweqr")} [oiuweqr🔙1|➡️](oiuweqr🔙1|➡️)\){forthRef("oiuweqr",1)}🧑‍🤝‍🧑\({backRefs_noSelf("oiuweqr",1)} [oiuweqr🔙2|➡️](oiuweqr🔙2|➡️)\){forthRef("oiuweqr",2)}🧑‍🤝‍🧑${backRefs_noSelf("oiuweqr",2)}

\({query[ from index.tag "link" where toPage and toPage:find("oiuweqr➡️", 1, true) ]( from index.tag "link" where toPage and toPage:find("oiuweqr➡️", 1, true) )} \){query from index.tag "aspiring-page" where name and name:find("oiuweqr➡️", 1, true) )}

function getSelectedText()
  local sel = editor.getSelection()
  if not sel or sel.from == sel.to then return nil end
  local text = editor.getText()
  return text:sub(sel.from + 1, sel.to)
end

function setSelectedText(newText)
  local sel = editor.getSelection()
  if not sel or sel.from == sel.to then return nil end
  editor.replaceRange(sel.from, sel.to, newText)
end

function usrPrompt(hinText, iniText)
  local iniText = iniText or ""
  local input = editor.prompt(hinText, iniText)
  if not input then
    editor.flashNotification("Cancelled", "warn")
  end
  return input
end

local suffixFlabel = "➡️"
local suffixBlabel = "🔙"
local siblings = "🧑‍🤝‍🧑"

-- =========== Forth Anchor + Back Refs ==================

local function tableBack(Flabel)
  local aspiringPageBack = Flabel .. suffixBlabel
  return query[
    from index.tag "link"
    where toPage and toPage:find(aspiringPageBack, 1, true)
    order by _.thBlabel
    select {ref=_.ref, thBlabel=_.thBlabel}
  ](
    from index.tag "link"
    where toPage and toPage:find(aspiringPageBack, 1, true)
    order by _.thBlabel
    select {ref=_.ref, thBlabel=_.thBlabel}
  )
end

function backRefs(Flabel)
  local str = template.each(tableBack(Flabel), template.new[==[​[${_.ref}|${_.thBlabel}](${_.ref}|${_.thBlabel})​]==])
  if #str == 0 then return "No BackRef" end
  return str
end

command.define {
  name = "Insert: ForthAnchor + BackRefs",
  key = "Ctrl-,",
  run = function()
    local iniText = getSelectedText()
    -- local Flabel = usrPrompt('Enter: label (to be Referred)', iniText)
    local Flabel
    if iniText and iniText ~= "" then
      Flabel = iniText
    else
      Flabel = usrPrompt('Enter: label (to be Referred)', '')
    end
    if not Flabel then return end
    local aspiringPageForth = Flabel .. suffixFlabel
    local forthAnchor = "[" .. aspiringPageForth .. "|" .. suffixBlabel .. "|^|](" .. aspiringPageForth .. "|" .. suffixBlabel .. "|^|)"
    local backRefs = '${backRefs("' .. Flabel .. '")}'
    local fullText = forthAnchor .. backRefs
    if iniText and iniText ~= "" then
      setSelectedText("") -- Delete selected iniText
    end
    editor.insertAtPos(fullText, editor.getCursor(), true)
    editor.copyToClipboard(Flabel)
  end
}

-- =========== Back Anchor + Forth Ref ==================

local function tableBack_noSelf(Flabel, thBlabelNum)
  local aspiringPageBack = Flabel .. suffixBlabel
  return query[
    from index.tag "link"
    where toPage and toPage:find(aspiringPageBack, 1, true) and thBlabelNum ~= _.thBlabel
    order by _.thBlabel
    select {ref=_.ref, thBlabel=_.thBlabel}
  ](
    from index.tag "link"
    where toPage and toPage:find(aspiringPageBack, 1, true) and thBlabelNum ~= _.thBlabel
    order by _.thBlabel
    select {ref=_.ref, thBlabel=_.thBlabel}
  )
end

function backRefs_noSelf(Flabel, thBlabelNum)
  local str = template.each(tableBack_noSelf(Flabel, thBlabelNum), template.new[==[​[${_.ref}|${_.thBlabel}](${_.ref}|${_.thBlabel})​]==])
  if #str == 0 then return "No Sibling" end
  return str
end

local function tableForth(Flabel)
  local aspiringPageForth = Flabel .. suffixFlabel
  return query[
    from index.tag "link"
    where toPage == aspiringPageForth
    select {ref=_.ref}
  ](
    from index.tag "link"
    where toPage == aspiringPageForth
    select {ref=_.ref}
  )
end

function forthRef(Flabel, thBlabelNum)
  local str = template.each(tableForth(Flabel), template.new("[${_.ref}|​" .. thBlabelNum .. "​](${_.ref}|​" .. thBlabelNum .. "​)"))
  if #str == 0 then return "No such Anchor" end
  return str
end

command.define {
  name = "Insert: BackAnchor + ForthRef",
  key = "Ctrl-.",
  run = function()
    local alias = getSelectedText()
    local iniText = js.window.navigator.clipboard.readText()
    -- local Flabel = usrPrompt('Jump to: label', iniText)
    local Flabel
    if iniText and iniText ~= "" then
      Flabel = iniText
    else
      Flabel = usrPrompt('Jump to: label', '')
    end
    if not Flabel then return end
    local thBlabelNum = #tableBack(Flabel) + 1
    local aspiringPageBack = Flabel .. suffixBlabel .. thBlabelNum
    local backAnchor = "[" .. aspiringPageBack .. "||^|" .. suffixFlabel .. "](" .. aspiringPageBack .. "||^|" .. suffixFlabel .. ")"
    local forthRef = '${forthRef("' .. Flabel .. '",' .. thBlabelNum .. ')}'
    local backRefs_noSelf = '${backRefs_noSelf("' .. Flabel .. '",' .. thBlabelNum .. ')}'
    local fullText = backAnchor .. forthRef .. siblings .. backRefs_noSelf
    if alias and alias ~= "" then
      setSelectedText("") -- Delete selected alias
    else
      alias = ''
    end
    editor.insertAtPos(fullText, editor.getCursor(), true)
    editor.insertAtCursor(alias, false) -- scrollIntoView?
  end
}

index.defineTag {
  name = "link",
  metatable = {
    __index = function(self, attr)
      if attr == "thBlabel" then
        return tonumber(string.match(self.toPage, ".+" .. suffixBlabel .. "([0-9]+)"))
      end
    end
  }
}

backup 3.1

mdn➡️|🔙\({backRefs("mdn")} [mdn🔙1|➡️](mdn🔙1|➡️)\){forthRef("mdn",1)} mdn🔙2|➡️${forthRef("mdn",2)}

function getSelectedText()
  local sel = editor.getSelection()
  if not sel or sel.from == sel.to then return nil end
  local text = editor.getText()
  return text:sub(sel.from + 1, sel.to)
end

function setSelectedText(newText)
  local sel = editor.getSelection()
  if not sel or sel.from == sel.to then return nil end
  editor.replaceRange(sel.from, sel.to, newText)
end

function usrPrompt(hinText, iniText)
  local iniText = iniText or ""
  local input = editor.prompt(hinText, iniText)
  if not input then
    editor.flashNotification("Cancelled", "warn")
  end
  return input
end

local suffixFlabel = "➡️"
local suffixBlabel = "🔙"

-- =========== Forth Anchor + Back Refs ==================

local function tableBack(Flabel)
  local aspiringPageBack = Flabel .. suffixBlabel
  return query[
    from index.tag "link"
    where toPage and toPage:find(aspiringPageBack, 1, true)
    order by _.thBlabel
    select {ref=_.ref, thBlabel=_.thBlabel}
  ](
    from index.tag "link"
    where toPage and toPage:find(aspiringPageBack, 1, true)
    order by _.thBlabel
    select {ref=_.ref, thBlabel=_.thBlabel}
  )
end

function backRefs(Flabel)
  local str = template.each(tableBack(Flabel), template.new[==[​[${_.ref}|${_.thBlabel}](${_.ref}|${_.thBlabel})​]==])
  if #str == 0 then return "No BackRef" end
  return str
end

command.define {
  name = "Insert: ForthAnchor + BackRefs",
  key = "Ctrl-,",
  run = function()
    local iniText = getSelectedText()
    -- local Flabel = usrPrompt('Enter: label (to be Referred)', iniText)
    local Flabel
    if iniText and iniText ~= "" then
      Flabel = iniText
    else
      Flabel = usrPrompt('Enter: label (to be Referred)', '')
    end
    if not Flabel then return end
    local aspiringPageForth = Flabel .. suffixFlabel
    local forthAnchor = "[" .. aspiringPageForth .. "||^|" .. suffixBlabel .. "](" .. aspiringPageForth .. "||^|" .. suffixBlabel .. ")"
    local backRefs = '${backRefs("' .. Flabel .. '")}'
    local fullText = forthAnchor .. backRefs
    if iniText and iniText ~= "" then
      setSelectedText("") -- Delete selected iniText
    end
    editor.insertAtPos(fullText, editor.getCursor(), true)
    editor.copyToClipboard(Flabel)
  end
}

-- =========== Back Anchor + Forth Ref ==================

local function tableForth(Flabel)
  local aspiringPageForth = Flabel .. suffixFlabel
  return query[
    from index.tag "link"
    where toPage == aspiringPageForth
    select {ref=_.ref}
  ](
    from index.tag "link"
    where toPage == aspiringPageForth
    select {ref=_.ref}
  )
end

function forthRef(Flabel, thBlabelNum)
  local str = template.each(tableForth(Flabel), template.new("[${_.ref}|​" .. thBlabelNum .. "​](${_.ref}|​" .. thBlabelNum .. "​)"))
  if #str == 0 then return "No such Anchor" end
  return str
end

command.define {
  name = "Insert: BackAnchor + ForthRef",
  key = "Ctrl-.",
  run = function()
    local alias = getSelectedText()
    local iniText = js.window.navigator.clipboard.readText()
    -- local Flabel = usrPrompt('Jump to: label', iniText)
    local Flabel
    if iniText and iniText ~= "" then
      Flabel = iniText
    else
      Flabel = usrPrompt('Jump to: label', '')
    end
    if not Flabel then return end
    local thBlabelNum = #tableBack(Flabel) + 1
    local aspiringPageBack = Flabel .. suffixBlabel .. thBlabelNum
    local backAnchor = "[" .. aspiringPageBack .. "||^|" .. suffixFlabel .. "](" .. aspiringPageBack .. "||^|" .. suffixFlabel .. ")"
    local forthRef = '${forthRef("' .. Flabel .. '",' .. thBlabelNum .. ')}'
    local fullText = backAnchor .. forthRef
    if alias and alias ~= "" then
      setSelectedText("") -- Delete selected alias
    else
      alias = ''
    end
    editor.insertAtPos(fullText, editor.getCursor(), true)
    editor.insertAtCursor(alias, false) -- scrollIntoView?
  end
}

index.defineTag {
  name = "link",
  metatable = {
    __index = function(self, attr)
      if attr == "thBlabel" then
        return tonumber(string.match(self.toPage, ".+" .. suffixBlabel .. "([0-9]+)"))
      end
    end
  }
}

backup 2.2

aaa🔵|🔵\({backrefStat("aaa")}🔙\){backRefs("aaa")} aaa🟣1|🟣\({forthRef("aaa",1)}➡️\){backrefStat("aaa")} aaa🟣2|🟣\({forthRef("aaa",2)}➡️\){backrefStat("aaa")}

function getSelectedText()
  local sel = editor.getSelection()
  if not sel or sel.from == sel.to then return nil end
  local text = editor.getText()
  return text:sub(sel.from + 1, sel.to)
end

function setSelectedText(newText)
  local sel = editor.getSelection()
  if not sel or sel.from == sel.to then return nil end
  editor.replaceRange(sel.from, sel.to, newText)
end

function usrPrompt(hinText, iniText)
  local iniText = iniText or ""
  local input = editor.prompt(hinText, iniText)
  if not input then
    editor.flashNotification("Cancelled", "warn")
  end
  return input
end

local suffixFlabel = "🔵"
local suffixBlabel = "🟣"
local F = '➡️'
local B = '🔙'

-- =========== Forth Anchor + Back Refs ==================

local function tableBack(Flabel)
  local aspiringPageBack = Flabel .. suffixBlabel
  return query[
    from index.tag "link"
    where toPage and toPage:find(aspiringPageBack, 1, true)
    order by _.thBlabel
    select {ref=_.ref, thBlabel=_.thBlabel}
  ](
    from index.tag "link"
    where toPage and toPage:find(aspiringPageBack, 1, true)
    order by _.thBlabel
    select {ref=_.ref, thBlabel=_.thBlabel}
  )
end

function backrefStat(Flabel)
  return #tableBack(Flabel)
end

function backRefs(Flabel)
  local str = template.each(tableBack(Flabel), template.new[==[​[${_.ref}|${_.thBlabel}](${_.ref}|${_.thBlabel})​]==])
  if #str == 0 then return "No BackRef" end
  return str
end

command.define {
  name = "Insert: ForthAnchor + BackRefs",
  key = "Ctrl-,",
  run = function()
    local iniText = getSelectedText()
    -- local Flabel = usrPrompt('Enter: label (to be Referred)', iniText)
    local Flabel
    if iniText and iniText ~= "" then
      Flabel = iniText
    else
      Flabel = usrPrompt('Enter: label (to be Referred)', '')
    end
    if not Flabel then return end
    local aspiringPageForth = Flabel .. suffixFlabel
    local forthAnchor = "[" .. aspiringPageForth .. "||^|" .. suffixFlabel .. "](" .. aspiringPageForth .. "||^|" .. suffixFlabel .. ")"
    local backrefStat = '${backrefStat("' .. Flabel .. '")}'
    local backRefs = '${backRefs("' .. Flabel .. '")}'
    local fullText = forthAnchor .. backrefStat .. B .. backRefs
    if iniText and iniText ~= "" then
      setSelectedText("") -- Delete selected iniText
    end
    editor.insertAtPos(fullText, editor.getCursor(), true)
    editor.copyToClipboard(Flabel)
  end
}

-- =========== Back Anchor + Forth Ref ==================

local function tableForth(Flabel)
  local aspiringPageForth = Flabel .. suffixFlabel
  return query[
    from index.tag "link"
    where toPage == aspiringPageForth
    select {ref=_.ref}
  ](
    from index.tag "link"
    where toPage == aspiringPageForth
    select {ref=_.ref}
  )
end

function forthRef(Flabel, thBlabelNum)
  local str = template.each(tableForth(Flabel), template.new("[${_.ref}|​" .. thBlabelNum .. "​](${_.ref}|​" .. thBlabelNum .. "​)"))
  if #str == 0 then return "No such Anchor" end
  return str
end

command.define {
  name = "Insert: BackAnchor + ForthRef",
  key = "Ctrl-.",
  run = function()
    local alias = getSelectedText()
    local iniText = js.window.navigator.clipboard.readText()
    -- local Flabel = usrPrompt('Jump to: label', iniText)
    local Flabel
    if iniText and iniText ~= "" then
      Flabel = iniText
    else
      Flabel = usrPrompt('Jump to: label', '')
    end
    if not Flabel then return end
    local thBlabelNum = backrefStat(Flabel) + 1
    local aspiringPageBack = Flabel .. suffixBlabel .. thBlabelNum
    local backAnchor = "[" .. aspiringPageBack .. "||^|" .. suffixBlabel .. "](" .. aspiringPageBack .. "||^|" .. suffixBlabel .. ")"
    local forthRef = '${forthRef("' .. Flabel .. '",' .. thBlabelNum .. ')}'
    local backrefStat = '${backrefStat("' .. Flabel .. '")}'
    local fullText = backAnchor .. forthRef .. F .. backrefStat
    if alias and alias ~= "" then
      setSelectedText("") -- Delete selected alias
    else
      alias = ''
    end
    editor.insertAtPos(fullText, editor.getCursor(), true)
    editor.insertAtCursor(alias, false) -- scrollIntoView?
  end
}

index.defineTag {
  name = "link",
  metatable = {
    __index = function(self, attr)
      if attr == "thBlabel" then
        return tonumber(string.match(self.toPage, ".+" .. suffixBlabel .. "([0-9]+)"))
      end
    end
  }
}

backup 2.1

function getSelectedText()
  local sel = editor.getSelection()
  if not sel or sel.from == sel.to then return nil end
  local text = editor.getText()
  return text:sub(sel.from + 1, sel.to)
end

function setSelectedText(newText)
  local sel = editor.getSelection()
  if not sel or sel.from == sel.to then return nil end
  editor.replaceRange(sel.from, sel.to, newText)
end

function usrPrompt(hinText, iniText)
  local iniText = iniText or ""
  local input = editor.prompt(hinText, iniText)
  if not input then
    editor.flashNotification("Cancelled", "warn")
  end
  return input
end

local suffixFlabel = "🔵"
local suffixBlabel = "🟣"
local F = '➡️'
local B = '🔙'

-- =========== Forth Anchor + Back Refs ==================

local function tableBack(Flabel)
  local aspiringPageBack = Flabel .. suffixBlabel
  return query[
    from index.tag "link"
    where toPage and toPage:find(aspiringPageBack, 1, true)
    order by _.thBlabel
    select {ref=_.ref, thBlabel=_.thBlabel}
  ](
    from index.tag "link"
    where toPage and toPage:find(aspiringPageBack, 1, true)
    order by _.thBlabel
    select {ref=_.ref, thBlabel=_.thBlabel}
  )
end

function backrefStat(Flabel)
  return #tableBack(Flabel)
end

function backRefs(Flabel)
  local str = template.each(tableBack(Flabel), template.new[==[​[${_.ref}|${_.thBlabel}](${_.ref}|${_.thBlabel})​]==])
  if #str == 0 then return "No BackRef" end
  return str
end

command.define {
  name = "Insert: ForthAnchor + BackRefs",
  key = "Ctrl-,",
  run = function()
    local iniText = getSelectedText()
    -- local Flabel = usrPrompt('Enter: label (to be Referred)', iniText)
    local Flabel
    if iniText and iniText ~= "" then
      Flabel = iniText
    else
      Flabel = usrPrompt('Enter: label (to be Referred)', '')
    end
    if not Flabel then return end
    local aspiringPageForth = Flabel .. suffixFlabel
    local forthAnchor = "[" .. aspiringPageForth .. "||^|" .. suffixFlabel .. "](" .. aspiringPageForth .. "||^|" .. suffixFlabel .. ")"
    local backrefStat = '${backrefStat("' .. Flabel .. '")}'
    local backRefs = '${backRefs("' .. Flabel .. '")}'
    local fullText = forthAnchor .. backrefStat .. B .. backRefs
    if iniText and iniText ~= "" then
      setSelectedText("") -- Delete selected iniText
    end
    editor.insertAtPos(fullText, editor.getCursor(), true)
    editor.copyToClipboard(Flabel)
  end
}

-- =========== Back Anchor + Forth Ref ==================

local function tableForth(Flabel)
  local aspiringPageForth = Flabel .. suffixFlabel
  return query[
    from index.tag "link"
    where toPage == aspiringPageForth
    select {ref=_.ref}
  ](
    from index.tag "link"
    where toPage == aspiringPageForth
    select {ref=_.ref}
  )
end

function forthRef(Flabel)
  local str = template.each(tableForth(Flabel), template.new("[${_.ref}|​" .. backrefStat(Flabel) .. "​](${_.ref}|​" .. backrefStat(Flabel) .. "​)"))
  if #str == 0 then return "No such Anchor" end
  return str
end

command.define {
  name = "Insert: BackAnchor + ForthRef",
  key = "Ctrl-.",
  run = function()
    local alias = getSelectedText()
    local iniText = js.window.navigator.clipboard.readText()
    -- local Flabel = usrPrompt('Jump to: label', iniText)
    local Flabel
    if iniText and iniText ~= "" then
      Flabel = iniText
    else
      Flabel = usrPrompt('Jump to: label', '')
    end
    if not Flabel then return end
    local thBlabelNum = backrefStat(Flabel) + 1
    local aspiringPageBack = Flabel .. suffixBlabel .. thBlabelNum
    local backAnchor = "[" .. aspiringPageBack .. "||^|" .. suffixBlabel .. "](" .. aspiringPageBack .. "||^|" .. suffixBlabel .. ")"
    local forthRef = '${forthRef("' .. Flabel .. '")}'
    local fullText = backAnchor .. thBlabelNum .. F .. forthRef
    if alias and alias ~= "" then
      setSelectedText("") -- Delete selected alias
    else
      alias = ''
    end
    editor.insertAtPos(fullText, editor.getCursor(), true)
    editor.insertAtCursor(alias, false) -- scrollIntoView?
  end
}

index.defineTag {
  name = "link",
  metatable = {
    __index = function(self, attr)
      if attr == "thBlabel" then
        return tonumber(string.match(self.toPage, ".+" .. suffixBlabel .. "([0-9]+)"))
      end
    end
  }
}

backup 1

simpler🔵|\({backrefStat("simpler")} 🔙 \){backRefs("simpler")}

simpler🟣2|simpler🟣2 ➡️ \({forthRef("simpler")}\){backrefStat("simpler")} 1. simpler🟣3|simpler🟣3 ➡️ \({forthRef("simpler")}\){backrefStat("simpler")} simpler🟣1|simpler🟣1 ➡️ \({forthRef("simpler")}\){backrefStat("simpler")}

Header A	Header B
Cell A	[simpler🟣4

• [ ] simpler🟣5|simpler🟣5 ➡️ \({forthRef("simpler")}\){backrefStat("simpler")}

function getSelectedText()
  local sel = editor.getSelection()
  if not sel or sel.from == sel.to then return nil end
  local text = editor.getText()
  return text:sub(sel.from + 1, sel.to)
end

function setSelectedText(newText)
  local sel = editor.getSelection()
  if not sel or sel.from == sel.to then return nil end
  editor.replaceRange(sel.from, sel.to, newText)
end

function usrPrompt(hinText, iniText)
  local iniText = iniText or ""
  local input = editor.prompt(hinText, iniText)
  if not input then
    editor.flashNotification("Cancelled", "warn")
  end
  return input
end

local suffixFlabel = "🔵"
local suffixBlabel = "🟣"
local F = " ➡️ "
local B = " 🔙 "

-- =========== Forth Anchor + Back Refs ==================

local function tableBack(Flabel)
  local aspiringPageBack = Flabel .. suffixBlabel
  return query[
    from index.tag "link"
    where toPage and toPage:find(aspiringPageBack, 1, true)
    order by _.thBlabel
    select {ref=_.ref, thBlabel=_.thBlabel}
  ](
    from index.tag "link"
    where toPage and toPage:find(aspiringPageBack, 1, true)
    order by _.thBlabel
    select {ref=_.ref, thBlabel=_.thBlabel}
  )
end

function backrefStat(Flabel)
  return #tableBack(Flabel)
end

function backRefs(Flabel)
  local str = template.each(tableBack(Flabel), template.new[==[​[${_.ref}](${_.ref})~${_.thBlabel}~]==])
  if #str == 0 then return "No BackRef" end
  return str
end

command.define {
  name = "Insert: ForthAnchor + BackRefs",
  key = "Ctrl-,",
  run = function()
    local iniText = getSelectedText()
    -- local Flabel = usrPrompt('Enter: label (to be Referred)', iniText)
    local Flabel
    if iniText and iniText ~= "" then
      Flabel = iniText
    else
      Flabel = usrPrompt('Enter: label (to be Referred)', '')
    end
    if not Flabel then return end
    local aspiringPageForth = Flabel .. suffixFlabel
    local forthAnchor = "[" .. aspiringPageForth .. "||^|](" .. aspiringPageForth .. "||^|)"
    local backrefStat = '${backrefStat("' .. Flabel .. '")}'
    local backRefs = '${backRefs("' .. Flabel .. '")}'
    local fullText = forthAnchor .. backrefStat .. B .. backRefs
    if iniText and iniText ~= "" then
      setSelectedText("") -- Delete selected iniText
    end
    editor.insertAtPos(fullText, editor.getCursor(), true)
    editor.copyToClipboard(Flabel)
  end
}

-- =========== Back Anchor + Forth Ref ==================

local function tableForth(Flabel)
  local aspiringPageForth = Flabel .. suffixFlabel
  return query[
    from index.tag "link"
    where toPage == aspiringPageForth
    select {ref=_.ref}
  ](
    from index.tag "link"
    where toPage == aspiringPageForth
    select {ref=_.ref}
  )
end

function forthRef(Flabel)
  local str = template.each(tableForth(Flabel), template.new[==[​[${_.ref}](${_.ref})​]==])
  if #str == 0 then return "No such Anchor" end
  return str
end

command.define {
  name = "Insert: BackAnchor + ForthRef",
  key = "Ctrl-.",
  run = function()
    local alias = getSelectedText()
    local iniText = js.window.navigator.clipboard.readText()
    -- local Flabel = usrPrompt('Jump to: label', iniText)
    local Flabel
    if iniText and iniText ~= "" then
      Flabel = iniText
    else
      Flabel = usrPrompt('Jump to: label', '')
    end
    if not Flabel then return end
    local thBlabelNum = backrefStat(Flabel) + 1
    local aspiringPageBack = Flabel .. suffixBlabel .. thBlabelNum
    local backAnchor = "[" .. aspiringPageBack .. "||^|](" .. aspiringPageBack .. "||^|)"
    local theBlabel = "~" .. thBlabelNum .."~"
    local forthRef = '${forthRef("' .. Flabel .. '")}'
    local backrefStat = '${backrefStat("' .. Flabel .. '")}'
    local fullText = backAnchor .. theBlabel .. F .. forthRef .. backrefStat
    if alias and alias ~= "" then
      setSelectedText("") -- Delete selected alias
    else
      alias = Flabel .. suffixBlabel -- alias = ''
    end
    editor.insertAtPos(fullText, editor.getCursor(), true)
    editor.insertAtCursor(alias, false) -- scrollIntoView?
  end
}

index.defineTag {
  name = "link",
  metatable = {
    __index = function(self, attr)
      if attr == "thBlabel" then
        return tonumber(string.match(self.toPage, ".+" .. suffixBlabel .. "([0-9]+)"))
      end
    end
  }
}

first attempt

1. an testing improvement from Library/xczphysics/CONFIG/Copy_as/Cursor_Wiki
2. https://community.silverbullet.md/t/generate-link-cursor-position/3372/2?u=chenzhu-xie

-- Stable Cursor Reference Plugin
-- Author: Expert
-- Description:
--   Provides a command to copy a reference at the current cursor position,
--   formatted as [PageName@position](PageName@position), which automatically stays valid
--   even after the document is edited.
--   This works by using SilverBullet’s built-in "link" index, which updates
--   cursor positions whenever the page content changes.
--   No widgets or extra rendering logic are required.

command.define {
  name = "Cursor: Copy Auto-updating Reference",
  key = "Alt-C",
  run = function()
    -- Step 1: Get the current page name
    local pageName = editor.getCurrentPage()
    if not pageName then
      editor.flashNotification("Failed to get current page name", "error")
      return
    end

    -- Step 2: Get the current cursor position (as a numeric offset)
    local pos = editor.getCursor()
    if type(pos) ~= "number" then
      editor.flashNotification("Cursor position is not numeric", "error")
      return
    end

    -- Step 3: Register a standard "link" tag in the SilverBullet index
    -- The built-in "link" index is automatically re-computed whenever
    -- the document changes, ensuring the link position stays accurate.
    index.tag("link", {
      page = pageName,     -- The page where this reference originates
      toPage = pageName,   -- The target page (self-reference)
      pos = pos            -- The current cursor offset in the file
    })

    -- Step 4: Build the actual wiki-style reference string
    local ref = string.format("[%s@%d](%s@%d)", pageName, pos)

    -- Step 5: Copy it to the clipboard
    local ok, err = pcall(function()
      editor.copyToClipboard(ref)
    end)

    if ok then
      editor.flashNotification("Copied auto-updating reference: " .. ref, "info")
    else
      editor.flashNotification("Clipboard copy failed: " .. tostring(err), "error")
    end
  end
}