silverbullet/Library/Malys/CursorPosition.md

author, description, name, tags, share.uri, share.hash, share.mode

author	description	name	tags	share.uri	share.hash	share.mode
malys	Generate and copy links to specific cursor positions and headers in markdown documents	Library/Malys/CursorPosition	meta/library	https://github.com/malys/silverbullet-libraries/blob/main/src/CursorPosition.md	a8544328	pull

Cursor Position Link Generator

This script provides functionality to generate and copy links to specific cursor positions and headers within markdown documents. It's particularly useful for creating precise references within a document or across multiple documents.

Features

• External Links: Generate full URLs pointing to specific cursor positions or headers
• Internal Links: Create markdown-style internal links for use within the same document

Usage

External Links (Ctrl+Shift+C)

Copies a full URL to the current cursor position or header to the clipboard.

• If the cursor is on a header line: Creates a URL with the header as an anchor (e.g., https://your-host/Page#Header Name)
• If not on a header: Creates a URL with the cursor position (e.g., https://your-host/Page@123)

Internal Links (Ctrl+Shift+L)

Copies a markdown-style internal link to the current cursor position or header.

• If on a header: Creates a link like [Header Name@123]
• If not on a header: Creates a link like [Page Name@123]

---

Source

-- [[Page#Header]] -> http(s)://host/Page#Header
-- [[Page@pos]]    -> http(s)://host/Page@pos

local function replace_space_with_percent20(s)
  local parts = {}
  for i = 1, #s do
    local c = s:sub(i, i)
    if c == " " then
      parts[#parts+1] = "%20"
    else
      parts[#parts+1] = c
    end
  end
  return table.concat(parts)
end

local function build_page_url(pageName)
  -- get direct url from js
  local BASE_URL = js.window.location.origin
  local path = replace_space_with_percent20(pageName)
  if BASE_URL:sub(-1) == "/" then
    return BASE_URL .. path
  else
    return BASE_URL .. "/" .. path
  end
end

command.define {
  name = "Cursor: Copy external link",
  key = "Ctrl-Shift-c",
  run = function()
    local currentLine = editor.getCurrentLine().text
    local pageName = editor.getCurrentPage()
    local pos = editor.getCursor()
    local headerMarks, headerName = string.match(currentLine, "^(#+) +(.+)$")
    
    local pageUrl = build_page_url(pageName)
    local out
    if headerMarks and headerName and headerName:match("%S") then
      headerName = headerName:match("^%s*(.+)")
      headerName = replace_space_with_percent20(headerName)
      out = string.format("%s#%s", pageUrl, headerName)
      -- editor.flashNotification("Copied header external link: " .. out, "info")
      editor.flashNotification("Copied header link: " .. out, "info")
    else
      out = string.format("%s@%d", pageUrl, pos)
      -- editor.flashNotification("Copied cursor external link: " .. out, "info")
      editor.flashNotification("Copied cursor link: " .. out, "info")
    end
  
    editor.copyToClipboard(out)
  end
}


command.define {
  name = "Cursor: Copy internal link",
  key = "Ctrl-Shift-l",
  run = function()
    local currentLine = editor.getCurrentLine().text
    local pageName = editor.getCurrentPage()
    local pos = editor.getCursor()
    local headerMarks, headerName = string.match(currentLine, "^(#+) +(.+)$")
    
    local out
    if headerMarks and headerName and headerName:match("%S") then
      headerName = headerName:match("^%s*(.+)")
      out = string.format("[[%s@%s]]", replace_space_with_percent20(headerName), pos)
      editor.flashNotification("Copied header internal link: " .. out, "info")
    else
      out = string.format("[[%s@%d]]", replace_space_with_percent20(pageName), pos)
      editor.flashNotification("Copied cursor internal link: " .. out, "info")
    end
  
    editor.copyToClipboard(out)
  end
}