range: extmarks/tsquery; renderer: text-change

lua/u/extmark.lua

@@ -0,0 +1,71 @@
+local Pos = require 'u.pos'
+
+---@class u.Extmark
+---@field bufnr integer
+---@field id integer
+---@field nsid integer
+local Extmark = {}
+Extmark.__index = Extmark
+
+--- @param bufnr integer
+--- @param nsid integer
+--- @param id integer
+function Extmark.new(bufnr, nsid, id)
+  return setmetatable({
+    bufnr = bufnr,
+    nsid = nsid,
+    id = id,
+  }, Extmark)
+end
+
+--- @param range u.Range
+--- @param nsid integer
+function Extmark.from_range(range, nsid)
+  local r = range:to_charwise()
+  local stop = r.stop or r.start
+  local end_row = stop.lnum - 1
+  local end_col = stop.col
+  if range.mode == 'V' then
+    end_row = end_row + 1
+    end_col = 0
+  end
+  local id = vim.api.nvim_buf_set_extmark(r.start.bufnr, nsid, r.start.lnum - 1, r.start.col - 1, {
+    right_gravity = false,
+    end_right_gravity = true,
+    end_row = end_row,
+    end_col = end_col,
+  })
+  return Extmark.new(r.start.bufnr, nsid, id)
+end
+
+function Extmark:range()
+  local Range = require 'u.range'
+
+  local raw_extmark =
+    vim.api.nvim_buf_get_extmark_by_id(self.bufnr, self.nsid, self.id, { details = true })
+  local start_row0, start_col0, details = unpack(raw_extmark)
+
+  --- @type u.Pos
+  local start = Pos.from00(self.bufnr, start_row0, start_col0)
+  --- @type u.Pos?
+  local stop = details
+    and details.end_row
+    and details.end_col
+    and Pos.from01(self.bufnr, details.end_row, details.end_col)
+
+  local n_buf_lines = vim.api.nvim_buf_line_count(self.bufnr)
+  if stop and stop.lnum > n_buf_lines then
+    stop.lnum = n_buf_lines
+    stop = stop:eol()
+  end
+  if stop and stop.col == 0 then
+    stop.col = 1
+    stop = stop:next(-1)
+  end
+
+  return Range.new(start, stop, 'v')
+end
+
+function Extmark:delete() vim.api.nvim_buf_del_extmark(self.bufnr, self.nsid, self.id) end
+
+return Extmark