146 lines
3.5 KiB
Lua
146 lines
3.5 KiB
Lua
local api = vim.api
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local fn = vim.fn
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local buffer = {
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addline = function(self, nodes, index)
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local size = self.size
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if index then
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assert(index <= size + 1)
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index = index
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else
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index = size + 1
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end
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local append = index == size + 1
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local line = index - 1
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if type(nodes) == 'string' then
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self[index] = nodes
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else
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local bufnr = self.bufnr
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local col = 0
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if type(nodes[1]) == 'string' then
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self[index] = nodes[1]
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nodes:load(bufnr, line, col)
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else
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local strs = {}
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local num = #nodes
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for i = 1, num do
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strs[i] = nodes[i][1]
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end
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self[index] = table.concat(strs)
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for i = 1, num do
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local node = nodes[i]
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node:load(bufnr, line, col)
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col = col + #node[1]
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end
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end
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end
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if append then
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self.size = self.size + 1
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end
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end,
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wipe = function(self)
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api.nvim_buf_set_lines(self.bufnr, 0, -1, false, {})
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self.size = 0
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end,
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del = function(self, _start, _end)
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if not _start then
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fn.deletebufline(self.bufnr, '$')
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else
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_end = _end or _start
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fn.deletebufline(self.bufnr, _start, _end)
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end
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self.size = api.nvim_buf_line_count(self.bufnr)
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end,
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set = function(self, name, option)
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api.nvim_buf_set_option(self.bufnr, name, option)
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end,
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option = function(self, name)
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return api.nvim_buf_get_option(self.bufnr, name)
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end,
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is_valid = function(self)
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return api.nvim_buf_is_valid(self.bufnr)
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end,
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delete = function(self)
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api.nvim_buf_delete(self.bufnr, { force = true })
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end,
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len = function(self)
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return api.nvim_buf_line_count(self.bufnr) - 1
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end,
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map = function(self, key, operation)
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vim.keymap.set('n', key, operation, {
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buffer = self.bufnr,
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silent = true,
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})
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end,
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normal = function(self, key)
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api.nvim_buf_call(self.bufnr, function()
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vim.cmd([[normal! ]] .. key)
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end)
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end,
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lines = function(self, i, j)
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i = i and i - 1 or 0
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j = j and j - 1 or -1
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return api.nvim_buf_get_lines(self.bufnr, i, j, false)
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end,
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height = function(self, width)
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local size = self.size
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if width then
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local lines = self:lines()
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local height = 0
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for i = 1, size do
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height = height + math.max(1, (math.ceil(lines[i]:width() / width)))
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end
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return height
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else
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return size
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end
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end,
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init = function(self)
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self.bufnr = api.nvim_create_buf(false, false)
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self:set('filetype', 'Trans')
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self:set('buftype', 'nofile')
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self.size = 0
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end,
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}
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buffer.__index = function(self, key)
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local res = buffer[key]
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if res then
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return res
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elseif type(key) == 'number' then
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return fn.getbufoneline(self.bufnr, key)
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else
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error('invalid key' .. key)
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end
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end
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buffer.__newindex = function(self, key, text)
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assert(key <= self.size + 1)
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fn.setbufline(self.bufnr, key, text)
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end
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return function()
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return setmetatable({
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bufnr = -1,
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size = 0,
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}, buffer)
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end
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