mirror of https://github.com/folke/lazy.nvim.git
149 lines
3.1 KiB
Lua
149 lines
3.1 KiB
Lua
local Config = require("lazy.core.config")
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---@alias TextSegment {str: string, hl?:string|Extmark}
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---@alias Extmark {hl_group?:string, col?:number, end_col?:number}
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---@class Text
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---@field _lines TextSegment[][]
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---@field padding number
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local Text = {}
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function Text.new()
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local self = setmetatable({}, {
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__index = Text,
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})
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self._lines = {}
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return self
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end
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---@param str string
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---@param hl? string|Extmark
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---@param opts? {indent?: number, prefix?: string}
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function Text:append(str, hl, opts)
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opts = opts or {}
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if #self._lines == 0 then
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self:nl()
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end
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local lines = vim.split(str, "\n")
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for l, line in ipairs(lines) do
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if opts.prefix then
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line = opts.prefix .. line
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end
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if opts.indent then
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line = string.rep(" ", opts.indent) .. line
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end
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if l > 1 then
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self:nl()
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end
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table.insert(self._lines[#self._lines], {
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str = line,
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hl = hl,
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})
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end
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return self
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end
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function Text:nl()
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table.insert(self._lines, {})
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return self
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end
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function Text:render(buf)
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local lines = {}
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for _, line in ipairs(self._lines) do
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local str = (" "):rep(self.padding)
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for _, segment in ipairs(line) do
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str = str .. segment.str
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end
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table.insert(lines, str)
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end
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vim.api.nvim_buf_set_lines(buf, 0, -1, false, lines)
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for l, line in ipairs(self._lines) do
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local col = self.padding
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for _, segment in ipairs(line) do
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local width = vim.fn.strlen(segment.str)
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local extmark = segment.hl
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if extmark then
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if type(extmark) == "string" then
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extmark = { hl_group = extmark, end_col = col + width }
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end
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---@cast extmark Extmark
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local extmark_col = extmark.col or col
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extmark.col = nil
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vim.api.nvim_buf_set_extmark(buf, Config.ns, l - 1, extmark_col, extmark)
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end
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col = col + width
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end
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end
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end
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---@param patterns table<string,string>
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function Text:highlight(patterns)
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local col = self.padding
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local last = self._lines[#self._lines]
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---@type TextSegment?
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local text
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for s, segment in ipairs(last) do
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if s == #last then
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text = segment
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break
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end
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col = col + vim.fn.strlen(segment.str)
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end
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if text then
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for pattern, hl in pairs(patterns) do
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local from, to, match = text.str:find(pattern)
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while from do
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if match then
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from, to = text.str:find(match, from, true)
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end
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self:append("", {
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col = col + from - 1,
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end_col = col + to,
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hl_group = hl,
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})
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from, to = text.str:find(pattern, to + 1)
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end
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end
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end
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end
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function Text:trim()
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while #self._lines > 0 and #self._lines[1] == 0 do
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table.remove(self._lines, 1)
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end
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while #self._lines > 0 and #self._lines[#self._lines] == 0 do
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table.remove(self._lines)
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end
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end
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function Text:row()
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return #self._lines == 0 and 1 or #self._lines
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end
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function Text:col()
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if #self._lines == 0 then
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return 0
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end
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local width = 0
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for _, segment in ipairs(self._lines[#self._lines]) do
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width = width + vim.fn.strlen(segment.str)
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end
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return width
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end
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return Text
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