feat(auto_preview): Experimental auto preview and auto hover support
#10
This commit is contained in:
simrat39
226
lua/symbols-outline/preview.lua
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226
lua/symbols-outline/preview.lua
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@@ -0,0 +1,226 @@
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local vim = vim
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local main = require('symbols-outline')
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local config = require('symbols-outline.config')
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local M = {}
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local state = {
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preview_buf = nil,
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preview_win = nil,
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hover_buf = nil,
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hover_win = nil
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}
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local function is_current_win_outline()
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local curwin = vim.api.nvim_get_current_win()
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return curwin == main.state.outline_win
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end
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local function has_code_win()
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local isWinValid = vim.api.nvim_win_is_valid(main.state.code_win)
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if not isWinValid then return false end
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local bufnr = vim.api.nvim_win_get_buf(main.state.code_win)
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local isBufValid = vim.api.nvim_buf_is_valid(bufnr)
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return isBufValid
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end
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local function get_offset()
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local outline_winnr = main.state.outline_win
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local width = 53
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local height = 0
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if config.options.position == 'right' then
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width = 0 - width
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else
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width = vim.api.nvim_win_get_width(outline_winnr) + 1
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end
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return {height, width}
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end
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local function get_height()
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local uis = vim.api.nvim_list_uis()
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return math.ceil(uis[1].height / 3)
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end
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local function get_hovered_node()
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local hovered_line = vim.api.nvim_win_get_cursor(main.state.outline_win)[1]
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local node = main.state.flattened_outline_items[hovered_line]
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return node
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end
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local function update_preview(code_buf)
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code_buf = code_buf or vim.api.nvim_win_get_buf(main.state.code_win)
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local node = get_hovered_node()
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if not node then return end
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local lines = vim.api.nvim_buf_get_lines(code_buf, 0, -1, false)
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if state.preview_buf ~= nil then
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vim.api.nvim_buf_set_lines(state.preview_buf, 0, -1, 0, lines)
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vim.api.nvim_win_set_cursor(state.preview_win,
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{node.line + 1, node.character})
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end
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end
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local function setup_preview_buf()
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local code_buf = vim.api.nvim_win_get_buf(main.state.code_win)
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local ft = vim.api.nvim_buf_get_option(code_buf, "filetype")
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vim.api.nvim_buf_set_option(state.preview_buf, "syntax", ft)
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vim.api.nvim_buf_set_option(state.preview_buf, "bufhidden", "delete")
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vim.api.nvim_win_set_option(state.preview_win, "cursorline", true)
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update_preview(code_buf)
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end
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local function get_hover_params(node, winnr)
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local bufnr = vim.api.nvim_win_get_buf(winnr)
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local uri = vim.uri_from_bufnr(bufnr)
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return {
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textDocument = {uri = uri},
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position = {line = node.line, character = node.character},
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bufnr = bufnr
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}
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end
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local function update_hover()
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if not has_code_win() then return end
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local node = get_hovered_node()
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if not node then return end
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local params = get_hover_params(node, main.state.code_win)
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vim.lsp.buf_request(params.bufnr, "textDocument/hover", params,
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function(err, _, result)
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if err then print(vim.inspect(err)) end
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local markdown_lines = {}
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if result ~= nil then
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markdown_lines = vim.lsp.util.convert_input_to_markdown_lines(
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result.contents)
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end
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markdown_lines = vim.lsp.util.trim_empty_lines(markdown_lines)
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if vim.tbl_isempty(markdown_lines) then
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markdown_lines = {"No info available!"}
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end
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local stripped = {}
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local highlights = {}
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do
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local i = 1
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while i <= #markdown_lines do
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local line = markdown_lines[i]
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-- TODO(ashkan): use a more strict regex for filetype?
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local ft = line:match("^```([a-zA-Z0-9_]*)$")
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-- local ft = line:match("^```(.*)$")
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-- TODO(ashkan): validate the filetype here.
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if ft then
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local start = #stripped
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i = i + 1
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while i <= #markdown_lines do
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line = markdown_lines[i]
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if line == "```" then
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i = i + 1
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break
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end
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table.insert(stripped, line)
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i = i + 1
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end
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table.insert(highlights, {
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ft = ft,
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start = start + 1,
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finish = #stripped + 1 - 1
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})
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else
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table.insert(stripped, line)
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i = i + 1
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end
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end
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end
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if state.hover_buf ~= nil then
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vim.api.nvim_buf_set_lines(state.hover_buf, 0, -1, 0, stripped)
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end
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end)
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end
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local function setup_hover_buf()
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if not has_code_win() then return end
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local code_buf = vim.api.nvim_win_get_buf(main.state.code_win)
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local ft = vim.api.nvim_buf_get_option(code_buf, "filetype")
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vim.api.nvim_buf_set_option(state.hover_buf, "syntax", ft)
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vim.api.nvim_buf_set_option(state.hover_buf, "bufhidden", "delete")
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vim.api.nvim_win_set_option(state.hover_win, "wrap", true)
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update_hover()
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end
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function M.close_if_not_in_outline()
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if not is_current_win_outline() and has_code_win() then
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if state.preview_win ~= nil and
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vim.api.nvim_win_is_valid(state.preview_win) then
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vim.api.nvim_win_close(state.preview_win, true)
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end
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if state.hover_win ~= nil and vim.api.nvim_win_is_valid(state.hover_win) then
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vim.api.nvim_win_close(state.hover_win, true)
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end
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end
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end
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local function show_preview()
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if state.preview_win == nil and state.preview_buf == nil then
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state.preview_buf = vim.api.nvim_create_buf(false, true)
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vim.api.nvim_buf_attach(state.preview_buf, false, {
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on_detach = function()
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state.preview_buf = nil
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state.preview_win = nil
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end
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})
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local offsets = get_offset()
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state.preview_win = vim.api.nvim_open_win(state.preview_buf, false, {
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relative = 'win',
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width = 50,
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height = get_height(),
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bufpos = {0, 0},
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row = offsets[1],
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col = offsets[2],
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border = 'single'
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})
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setup_preview_buf()
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else
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update_preview()
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end
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end
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local function show_hover()
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if state.hover_win == nil and state.hover_buf == nil then
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state.hover_buf = vim.api.nvim_create_buf(false, true)
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vim.api.nvim_buf_attach(state.hover_buf, false, {
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on_detach = function()
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state.hover_buf = nil
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state.hover_win = nil
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end
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})
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local offsets = get_offset()
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local height = get_height()
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state.hover_win = vim.api.nvim_open_win(state.hover_buf, false, {
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relative = 'win',
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width = 50,
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height = height,
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bufpos = {0, 0},
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row = offsets[1] + height + 2,
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col = offsets[2],
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border = 'single'
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})
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setup_hover_buf()
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else
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update_hover()
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end
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end
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function M.show()
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if not is_current_win_outline() or #vim.api.nvim_list_wins() < 2 then
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return
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end
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show_preview()
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show_hover()
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end
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return M
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