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	Problem:  The "append" parameter added in abb40ece is missing from
          history entries, resulting in different message formatting
          for "g<".
Solution: Add "append" field to message history entries.
Co-authored-by: phanium <91544758+phanen@users.noreply.github.com>
		
	
		
			
				
	
	
		
			502 lines
		
	
	
		
			20 KiB
		
	
	
	
		
			Lua
		
	
	
	
	
	
			
		
		
	
	
			502 lines
		
	
	
		
			20 KiB
		
	
	
	
		
			Lua
		
	
	
	
	
	
local api, fn, o = vim.api, vim.fn, vim.o
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local ext = require('vim._extui.shared')
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---@class vim._extui.messages
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local M = {
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  -- Message window. Used for regular messages with 'cmdheight' == 0 or,
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  -- cfg.msg.target == 'msg'. Also used for verbose messages regardless of
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  -- cfg.msg.target. Automatically resizes to the text dimensions up to a point,
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  -- at which point only the most recent messages will fit and be shown.
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  -- A timer is started for each message whose callback will remove the message
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  -- from the window again.
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  msg = {
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    count = 0, -- Number of messages currently in the message window.
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    width = 1, -- Current width of the message window.
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    timer = nil, ---@type uv.uv_timer_t Timer that removes the most recent message.
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  },
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  -- Cmdline message window. Used for regular messages with 'cmdheight' > 0.
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  -- Also contains 'ruler', 'showcmd' and search_cmd/count messages as virt_text.
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  -- Messages that don't fit the 'cmdheight' are cut off and virt_text is added
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  -- to indicate the number of spilled lines and repeated messages.
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  cmd = {
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    count = 0, -- Number of messages currently in the message window.
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    lines = 0, -- Number of lines in cmdline buffer (including wrapped lines).
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    msg_row = -1, -- Last row of message to distinguish for placing virt_text.
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    last_col = o.columns, -- Crop text to start column of 'last' virt_text.
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    last_emsg = 0, -- Time an error was printed that should not be overwritten.
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  },
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  dupe = 0, -- Number of times message is repeated.
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  prev_msg = '', -- Concatenated content of the previous message.
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  virt = { -- Stored virt_text state.
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    last = { {}, {}, {}, {} }, ---@type MsgContent[] status in last cmdline row.
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    msg = { {}, {} }, ---@type MsgContent[] [(x)] indicators in message window.
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    idx = { mode = 1, search = 2, cmd = 3, ruler = 4, spill = 1, dupe = 2 },
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    ids = {}, ---@type { ['last'|'msg']: integer? } Table of mark IDs.
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    delayed = false, -- Whether placement of 'last' virt_text is delayed.
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  },
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}
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function M.msg:close()
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  self.width, M.virt.msg = 1, { {}, {} }
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  M.prev_msg = ext.cfg.msg.target == 'msg' and '' or M.prev_msg
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  api.nvim_buf_clear_namespace(ext.bufs.msg, -1, 0, -1)
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  if api.nvim_win_is_valid(ext.wins.msg) then
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    api.nvim_win_set_config(ext.wins.msg, { hide = true })
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  end
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end
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--- Start a timer whose callback will remove the message from the message window.
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---
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---@param buf integer Buffer the message was written to.
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---@param len integer Number of rows that should be removed.
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function M.msg:start_timer(buf, len)
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  self.timer = vim.defer_fn(function()
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    if self.count == 0 or not api.nvim_buf_is_valid(buf) then
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      return -- Messages moved to pager or buffer was closed.
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    end
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    api.nvim_buf_set_lines(buf, 0, len, false, {})
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    self.count = self.count - 1
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    -- Resize or hide message window for removed message.
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    if self.count > 0 then
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      M.set_pos('msg')
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    else
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      self:close()
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    end
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  end, ext.cfg.msg.timeout)
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end
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--- Place or delete a virtual text mark in the cmdline or message window.
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---
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---@param type 'last'|'msg'
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local function set_virttext(type)
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  if type == 'last' and (ext.cmdheight == 0 or M.virt.delayed) then
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    return
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  end
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  -- Concatenate the components of M.virt[type] and calculate the concatenated width.
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  local width, chunks = 0, {} ---@type integer, [string, integer|string][]
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  local contents = type == 'last' and M.virt.last or M.virt.msg
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  for _, content in ipairs(contents) do
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    for _, chunk in ipairs(content) do
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      chunks[#chunks + 1] = { chunk[2], chunk[3] }
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      width = width + api.nvim_strwidth(chunk[2])
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    end
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  end
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  if M.virt.ids[type] and #chunks == 0 then
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    api.nvim_buf_del_extmark(ext.bufs.cmd, ext.ns, M.virt.ids[type])
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    M.virt.ids[type] = nil
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    M.cmd.last_col = type == 'last' and o.columns or M.cmd.last_col
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  elseif #chunks > 0 then
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    local tar = type == 'msg' and ext.cfg.msg.target or 'cmd'
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    local win = ext.wins[tar]
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    local erow = tar == 'cmd' and math.min(M.cmd.msg_row, api.nvim_buf_line_count(ext.bufs.cmd) - 1)
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    local h = api.nvim_win_text_height(win, {
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      max_height = api.nvim_win_get_height(win),
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      start_row = tar == 'msg' and fn.line('w0', ext.wins.msg) - 1 or nil,
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      end_row = erow or nil,
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    })
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    local row = h.end_row ---@type integer
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    local col = fn.virtcol2col(win, row + 1, h.end_vcol)
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    local scol = fn.screenpos(win, row + 1, col).col ---@type integer
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    if type == 'msg' then
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      -- Calculate at which column to place the virt_text such that it is at the end
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      -- of the last visible message line, overlapping the message text if necessary,
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      -- but not overlapping the 'last' virt_text.
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      local offset = tar ~= 'msg' and 0
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        or api.nvim_win_get_position(win)[2] + (api.nvim_win_get_config(win).border and 1 or 0)
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      -- Check if adding the virt_text on this line will exceed the current window width.
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      local maxwidth = math.max(M.msg.width, math.min(o.columns, scol - offset + width))
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      if tar == 'msg' and api.nvim_win_get_width(win) < maxwidth then
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        api.nvim_win_set_width(win, maxwidth)
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        M.msg.width = maxwidth
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      end
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      local mwidth = tar == 'msg' and M.msg.width or M.cmd.last_col
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      if scol - offset + width > mwidth then
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        col = fn.virtcol2col(win, row + 1, h.end_vcol - (scol - offset + width - mwidth))
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      end
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      -- Give virt_text the same highlight as the message tail.
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      local pos, opts = { row, col }, { details = true, overlap = true, type = 'highlight' }
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      local hl = api.nvim_buf_get_extmarks(ext.bufs[tar], ext.ns, pos, pos, opts)
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      for _, chunk in ipairs(hl[1] and chunks or {}) do
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        chunk[2] = hl[1][4].hl_group
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      end
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    else
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      local mode = #M.virt.last[M.virt.idx.mode]
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      local pad = o.columns - width ---@type integer
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      local newlines = math.max(0, ext.cmdheight - h.all)
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      row = row + newlines
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      M.cmd.last_col = mode > 0 and 0 or o.columns - (newlines > 0 and 0 or width)
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      if newlines > 0 then
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        -- Add empty lines to place virt_text on the last screen row.
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        api.nvim_buf_set_lines(ext.bufs.cmd, -1, -1, false, fn['repeat']({ '' }, newlines))
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        col = 0
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      else
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        if scol > M.cmd.last_col then
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          -- Give the user some time to read an important message.
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          if os.time() - M.cmd.last_emsg < 2 then
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            M.virt.delayed = true
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            vim.defer_fn(function()
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              M.virt.delayed = false
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              set_virttext('last')
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            end, 2000)
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            return
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          end
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          -- Crop text on last screen row and find byte offset to place mark at.
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          local vcol = h.end_vcol - (scol - M.cmd.last_col) ---@type integer
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          col = vcol <= 0 and 0 or fn.virtcol2col(win, row + 1, vcol)
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          M.prev_msg = mode > 0 and '' or M.prev_msg
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          M.virt.msg = mode > 0 and { {}, {} } or M.virt.msg
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          api.nvim_buf_set_text(ext.bufs.cmd, row, col, row, -1, { mode > 0 and ' ' or '' })
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        end
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        pad = pad - ((mode > 0 or col == 0) and 0 or math.min(M.cmd.last_col, scol))
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      end
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      table.insert(chunks, mode + 1, { (' '):rep(pad) })
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      set_virttext('msg') -- Readjust to new M.cmd.last_col or clear for mode.
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    end
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    M.virt.ids[type] = api.nvim_buf_set_extmark(ext.bufs[tar], ext.ns, row, col, {
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      virt_text = chunks,
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      virt_text_pos = 'overlay',
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      right_gravity = false,
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      undo_restore = false,
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      invalidate = true,
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      id = M.virt.ids[type],
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      priority = type == 'msg' and 2 or 1,
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    })
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  end
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end
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-- We need to keep track of the current message column to be able to
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-- append or overwrite messages for :echon or carriage returns.
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local col, will_pager, hlopts = 0, false, { undo_restore = false, invalidate = true, priority = 1 }
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--- Move message to pager, appending if window was already open.
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local function msg_to_pager(tar)
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  if will_pager then
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    return
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  end
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  will_pager, M.prev_msg = true, ''
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  vim.schedule(function()
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    local hidden = api.nvim_win_get_config(ext.wins.pager).hide
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    local marks = api.nvim_buf_get_extmarks(ext.bufs[tar], -1, 0, -1, { details = true })
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    local lines = api.nvim_buf_get_lines(ext.bufs[tar], 0, -1, false)
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    api.nvim_buf_set_lines(ext.bufs.pager, hidden and 0 or -1, -1, false, lines)
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    local rows = api.nvim_buf_line_count(ext.bufs.pager) - #lines
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    api.nvim_buf_set_lines(ext.bufs[tar], 0, -1, false, {})
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    for _, mark in ipairs(marks) do
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      hlopts.end_col, hlopts.hl_group = mark[4].end_col, mark[4].hl_group
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      api.nvim_buf_set_extmark(ext.bufs.pager, ext.ns, mark[2] + rows, mark[3], hlopts)
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    end
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    M.msg:close()
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    M.set_pos('pager')
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    if not hidden then
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      api.nvim_command('norm! G')
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    end
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    M[tar].count, col, will_pager = 0, 0, false
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  end)
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end
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---@param tar 'cmd'|'dialog'|'msg'|'pager'
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---@param content MsgContent
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---@param replace_last boolean
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---@param append boolean
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---@param pager boolean? If true, route messages that exceed the target window to the pager.
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function M.show_msg(tar, content, replace_last, append, pager)
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  local msg, restart, cr, dupe, count = '', false, false, 0, 0
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  append = append and col > 0
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  if M[tar] then -- tar == 'cmd'|'msg'
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    if tar == ext.cfg.msg.target then
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      -- Save the concatenated message to identify repeated messages.
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      for _, chunk in ipairs(content) do
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        msg = msg .. chunk[2]
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      end
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      dupe = (msg == M.prev_msg and ext.cmd.row == 0 and M.dupe + 1 or 0)
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    end
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    cr = M[tar].count > 0 and msg:sub(1, 1) == '\r'
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    restart = M[tar].count > 0 and (replace_last or dupe > 0)
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    count = M[tar].count + ((restart or msg == '\n') and 0 or 1)
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    -- Ensure cmdline is clear when writing the first message.
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    if tar == 'cmd' and not will_pager and dupe == 0 and M.cmd.count == 0 then
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      api.nvim_buf_set_lines(ext.bufs.cmd, 0, -1, false, {})
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    end
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  end
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  -- Filter out empty newline messages. TODO: don't emit them.
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  if msg == '\n' then
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    return
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  end
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  local line_count = api.nvim_buf_line_count(ext.bufs[tar])
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  ---@type integer Start row after last line in the target buffer, unless
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  ---this is the first message, or in case of a repeated or replaced message.
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  local row = M[tar] and count <= 1 and not will_pager and (tar == 'cmd' and ext.cmd.row or 0)
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    or line_count - ((replace_last or restart or cr or append) and 1 or 0)
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  local curline = (cr or append) and api.nvim_buf_get_lines(ext.bufs[tar], row, row + 1, false)[1]
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  local start_row, width = row, M.msg.width
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  col = append and not cr and math.min(col, #curline) or 0
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  -- Accumulate to be inserted and highlighted message chunks for a non-repeated message.
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  for _, chunk in ipairs((not M[tar] or dupe == 0) and content or {}) do
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    -- Split at newline and write to start of line after carriage return.
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    for str in (chunk[2] .. '\0'):gmatch('.-[\n\r%z]') do
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      local repl, pat = str:sub(1, -2), str:sub(-1)
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      local end_col = col + #repl ---@type integer
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      if line_count < row + 1 then
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        api.nvim_buf_set_lines(ext.bufs[tar], row, -1, false, { repl })
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        line_count = line_count + 1
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      else
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        local ecol = curline and math.min(end_col, #curline) or -1
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        api.nvim_buf_set_text(ext.bufs[tar], row, col, row, ecol, { repl })
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      end
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      curline = api.nvim_buf_get_lines(ext.bufs[tar], row, row + 1, false)[1]
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      width = tar == 'msg' and math.max(width, api.nvim_strwidth(curline)) or 0
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      if chunk[3] > 0 then
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        hlopts.end_col, hlopts.hl_group = end_col, chunk[3]
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        api.nvim_buf_set_extmark(ext.bufs[tar], ext.ns, row, col, hlopts)
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      end
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      if pat == '\n' then
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        row, col = row + 1, 0
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      else
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        col = pat == '\r' and 0 or end_col
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      end
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    end
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  end
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  if tar == 'msg' then
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    api.nvim_win_set_width(ext.wins.msg, width)
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    local h = api.nvim_win_text_height(ext.wins.msg, { start_row = start_row })
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    if pager and h.all > 1 then
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      msg_to_pager(tar)
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      return
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    end
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    M.set_pos('msg')
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    M.msg.width = width
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    if restart then
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      M.msg.timer:stop()
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      M.msg.timer:set_repeat(4000)
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      M.msg.timer:again()
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    else
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      M.msg:start_timer(ext.bufs.msg, row - start_row + 1)
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    end
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  elseif tar == 'cmd' and dupe == 0 then
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    fn.clearmatches(ext.wins.cmd) -- Clear matchparen highlights.
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    if ext.cmd.row > 0 then
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      -- In block mode the cmdheight is already dynamic, so just print the full message
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      -- regardless of height. Spoof cmdline_show to put cmdline below message.
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      ext.cmd.row = ext.cmd.row + 1 + row - start_row
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      ext.cmd.cmdline_show({}, 0, ':', '', ext.cmd.indent, 0, 0)
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      api.nvim__redraw({ flush = true, cursor = true, win = ext.wins.cmd })
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    else
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      local h = api.nvim_win_text_height(ext.wins.cmd, {})
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      local want_pager = pager or will_pager or not api.nvim_win_get_config(ext.wins.pager).hide
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      if want_pager and h.all > ext.cmdheight then
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        msg_to_pager(tar)
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        return
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      end
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      api.nvim_win_set_cursor(ext.wins[tar], { 1, 0 })
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      ext.cmd.highlighter.active[ext.bufs.cmd] = nil
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      -- Place [+x] indicator for lines that spill over 'cmdheight'.
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      M.cmd.lines, M.cmd.msg_row = h.all, h.end_row
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      local spill = M.cmd.lines > ext.cmdheight and ('[+%d]'):format(M.cmd.lines - ext.cmdheight)
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      M.virt.msg[M.virt.idx.spill][1] = spill and { 0, spill } or nil
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    end
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  end
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  if M[tar] then
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    -- Place (x) indicator for repeated messages. Mainly to mitigate unnecessary
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    -- resizing of the message window, but also placed in the cmdline.
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    M.virt.msg[M.virt.idx.dupe][1] = dupe > 0 and { 0, ('(%d)'):format(dupe) } or nil
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    M.prev_msg, M.dupe, M[tar].count = msg, dupe, count
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    set_virttext('msg')
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  end
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  -- Reset message state the next event loop iteration.
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  if start_row == 0 or ext.cmd.row > 0 then
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    vim.schedule(function()
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      col, M.cmd.lines, M.cmd.count = 0, 0, 0
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    end)
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  end
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end
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local replace_bufwrite = false
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--- Route the message to the appropriate sink.
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---
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---@param kind string
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---@alias MsgChunk [integer, string, integer]
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---@alias MsgContent MsgChunk[]
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---@param content MsgContent
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--@param replace_last boolean
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--@param history boolean
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---@param append boolean
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function M.msg_show(kind, content, _, _, append)
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  if kind == 'search_count' then
 | 
						|
    -- Extract only the search_count, not the entered search command.
 | 
						|
    -- Match any of search.c:cmdline_search_stat():' [(x | >x | ?)/(y | >y | ??)]'
 | 
						|
    content = { content[#content] }
 | 
						|
    content[1][2] = content[1][2]:match('W? %[>?%d*%??/>?%d*%?*%]') .. '  '
 | 
						|
    M.virt.last[M.virt.idx.search] = content
 | 
						|
    M.virt.last[M.virt.idx.cmd] = { { 0, (' '):rep(11) } }
 | 
						|
    set_virttext('last')
 | 
						|
  elseif kind == 'return_prompt' then
 | 
						|
    -- Bypass hit enter prompt.
 | 
						|
    vim.api.nvim_feedkeys(vim.keycode('<CR>'), 'n', false)
 | 
						|
  elseif kind == 'verbose' then
 | 
						|
    -- Verbose messages are sent too often to be meaningful in the cmdline:
 | 
						|
    -- always route to message window regardless of cfg.msg.target.
 | 
						|
    M.show_msg('msg', content, false, append)
 | 
						|
  elseif ext.cmd.prompt then
 | 
						|
    -- Route to dialog that stays open so long as the cmdline prompt is active.
 | 
						|
    M.show_msg('dialog', content, api.nvim_win_get_config(ext.wins.dialog).hide, append)
 | 
						|
    M.set_pos('dialog')
 | 
						|
  else
 | 
						|
    -- Set the entered search command in the cmdline (if available).
 | 
						|
    local tar = kind == 'search_cmd' and 'cmd' or ext.cfg.msg.target
 | 
						|
    if tar == 'cmd' then
 | 
						|
      if ext.cmdheight == 0 or (ext.cmd.level > 0 and ext.cmd.row == 0) then
 | 
						|
        return -- Do not overwrite an active cmdline unless in block mode.
 | 
						|
      end
 | 
						|
      -- Store the time when an error message was emitted in order to not overwrite
 | 
						|
      -- it with 'last' virt_text in the cmdline to give the user a chance to read it.
 | 
						|
      M.cmd.last_emsg = kind == 'emsg' and os.time() or M.cmd.last_emsg
 | 
						|
      -- Should clear the search count now, mark itself is cleared by invalidate.
 | 
						|
      M.virt.last[M.virt.idx.search][1] = nil
 | 
						|
    end
 | 
						|
 | 
						|
    -- Typed "inspection" messages should be routed to the pager.
 | 
						|
    local inspect = { 'echo', 'echomsg', 'lua_print' }
 | 
						|
    local pager = kind == 'list_cmd' or (ext.cmd.level >= 0 and vim.tbl_contains(inspect, kind))
 | 
						|
    M.show_msg(tar, content, replace_bufwrite, append, pager)
 | 
						|
    -- Replace message for every second bufwrite message.
 | 
						|
    replace_bufwrite = not replace_bufwrite and kind == 'bufwrite'
 | 
						|
    -- Don't remember search_cmd message as actual message.
 | 
						|
    if kind == 'search_cmd' then
 | 
						|
      M.cmd.lines, M.cmd.count, M.prev_msg = 0, 0, ''
 | 
						|
    end
 | 
						|
  end
 | 
						|
end
 | 
						|
 | 
						|
function M.msg_clear() end
 | 
						|
 | 
						|
--- Place the mode text in the cmdline.
 | 
						|
---
 | 
						|
---@param content MsgContent
 | 
						|
function M.msg_showmode(content)
 | 
						|
  M.virt.last[M.virt.idx.mode] = ext.cmd.level > 0 and {} or content
 | 
						|
  M.virt.last[M.virt.idx.search] = {}
 | 
						|
  set_virttext('last')
 | 
						|
end
 | 
						|
 | 
						|
--- Place text from the 'showcmd' buffer in the cmdline.
 | 
						|
---
 | 
						|
---@param content MsgContent
 | 
						|
function M.msg_showcmd(content)
 | 
						|
  local str = content[1] and content[1][2]:sub(-10) or ''
 | 
						|
  M.virt.last[M.virt.idx.cmd][1] = (content[1] or M.virt.last[M.virt.idx.search][1])
 | 
						|
    and { 0, str .. (' '):rep(11 - #str) }
 | 
						|
  set_virttext('last')
 | 
						|
end
 | 
						|
 | 
						|
--- Place the 'ruler' text in the cmdline window.
 | 
						|
---
 | 
						|
---@param content MsgContent
 | 
						|
function M.msg_ruler(content)
 | 
						|
  M.virt.last[M.virt.idx.ruler] = ext.cmd.level > 0 and {} or content
 | 
						|
  set_virttext('last')
 | 
						|
end
 | 
						|
 | 
						|
---@alias MsgHistory [string, MsgContent, boolean]
 | 
						|
--- Open the message history in the pager.
 | 
						|
---
 | 
						|
---@param entries MsgHistory[]
 | 
						|
function M.msg_history_show(entries)
 | 
						|
  if #entries == 0 then
 | 
						|
    return
 | 
						|
  end
 | 
						|
 | 
						|
  api.nvim_buf_set_lines(ext.bufs.pager, 0, -1, false, {})
 | 
						|
  for i, entry in ipairs(entries) do
 | 
						|
    M.show_msg('pager', entry[2], i == 1, entry[3])
 | 
						|
  end
 | 
						|
 | 
						|
  M.set_pos('pager')
 | 
						|
end
 | 
						|
 | 
						|
function M.msg_history_clear() end
 | 
						|
 | 
						|
--- Adjust dimensions of the message windows after certain events.
 | 
						|
---
 | 
						|
---@param type? 'cmd'|'dialog'|'msg'|'pager' Type of to be positioned window (nil for all).
 | 
						|
function M.set_pos(type)
 | 
						|
  local function win_set_pos(win)
 | 
						|
    local texth = type and api.nvim_win_text_height(win, {}) or 0
 | 
						|
    local height = type and math.min(texth.all, math.ceil(o.lines * 0.5))
 | 
						|
    local config = {
 | 
						|
      hide = false,
 | 
						|
      relative = 'laststatus',
 | 
						|
      height = height,
 | 
						|
      row = win == ext.wins.msg and 0 or 1,
 | 
						|
      col = 10000,
 | 
						|
    }
 | 
						|
 | 
						|
    if type == 'msg' then
 | 
						|
      -- Ensure last line is visible and first line is at top of window.
 | 
						|
      local row = (texth.all > height and texth.end_row or 0) + 1
 | 
						|
      api.nvim_win_set_cursor(ext.wins.msg, { row, 0 })
 | 
						|
    elseif type == 'pager' and api.nvim_win_get_config(win).hide then
 | 
						|
      -- Cannot leave the cmdwin to enter the pager, so close it.
 | 
						|
      -- NOTE: regression w.r.t. the message grid, which allowed this. Resolving
 | 
						|
      -- that would require somehow bypassing textlock for the pager.
 | 
						|
      if fn.getcmdwintype() ~= '' then
 | 
						|
        api.nvim_command('quit')
 | 
						|
      end
 | 
						|
 | 
						|
      -- It's actually closed one event iteration later so schedule in case it was open.
 | 
						|
      vim.schedule(function()
 | 
						|
        api.nvim_set_current_win(win)
 | 
						|
        api.nvim_create_autocmd({ 'WinEnter', 'CmdwinEnter', 'CmdwinLeave' }, {
 | 
						|
          callback = function(ev)
 | 
						|
            -- Make pager relative to cmdwin when it is opened, restore when it is closed.
 | 
						|
            config = ev.event == 'CmdwinLeave' and config
 | 
						|
              or ev.event == 'WinEnter' and { hide = true }
 | 
						|
              or { relative = 'win', win = 0, row = 0, col = 0 }
 | 
						|
            if api.nvim_win_is_valid(win) then
 | 
						|
              api.nvim_win_set_config(win, config)
 | 
						|
            end
 | 
						|
            -- Delete autocmd when a window other than the cmdwin is entered.
 | 
						|
            return ev.event == 'WinEnter'
 | 
						|
          end,
 | 
						|
          desc = 'Hide inactive pager window.',
 | 
						|
        })
 | 
						|
      end)
 | 
						|
    end
 | 
						|
    api.nvim_win_set_config(win, config)
 | 
						|
  end
 | 
						|
 | 
						|
  for t, win in pairs(ext.wins) do
 | 
						|
    local cfg = (t == type or (type == nil and t ~= 'cmd'))
 | 
						|
      and api.nvim_win_is_valid(win)
 | 
						|
      and api.nvim_win_get_config(win)
 | 
						|
    if cfg and (type or not cfg.hide) then
 | 
						|
      win_set_pos(win)
 | 
						|
    end
 | 
						|
  end
 | 
						|
end
 | 
						|
 | 
						|
return M
 |