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Merge pull request #246 from parmort/rework-help-preview

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[RFC] Fix help_tags previewer
This commit is contained in:
Senghan Bright
2020-11-16 18:02:32 +01:00
committed by GitHub
parent 985856946e f9f83004b6
commit c01b7ad024
1 changed files with 35 additions and 11 deletions
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46
lua/telescope/previewers.lua
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@@ -418,25 +418,49 @@ previewers.help = defaulter(function(_)
preview_fn = function(self, entry, status)
with_preview_window(status, nil, function()
local special_chars = ":~^.?/%[%]%*"
local delim = string.char(9)
local escaped = vim.fn.escape(entry.value, special_chars)
local tagfile = vim.fn.expand("$VIMRUNTIME") .. '/doc/tags'
local old_tags = vim.o.tags
local tags = {}
vim.o.tags = tagfile
local taglist = vim.fn.taglist('^' .. escaped .. '$', tagfile)
vim.o.tags = old_tags
if vim.tbl_isempty(taglist) then
taglist = vim.fn.taglist(escaped, tagfile)
local find_rtp_file = function(path, count)
return vim.fn.findfile(path, vim.o.runtimepath, count)
end
if vim.tbl_isempty(taglist) then
return
local matches = {}
for _,file in pairs(find_rtp_file('doc/tags', -1)) do
local f = assert(io.open(file, "rb"))
for line in f:lines() do
matches = {}
for match in (line..delim):gmatch("(.-)" .. delim) do
table.insert(matches, match)
end
table.insert(tags, {
name = matches[1],
filename = matches[2],
cmd = matches[3]
})
end
f:close()
end
local search_tags = function(pattern)
local results = {}
for _, tag in pairs(tags) do
if vim.fn.match(tag.name, pattern) ~= -1 then
table.insert(results, tag)
end
end
return results
end
local taglist = search_tags('^' .. escaped .. '$')
if taglist == {} then taglist = search_tags(escaped) end
local best_entry = taglist[1]
local new_bufnr = vim.fn.bufnr(best_entry.filename, true)
local new_bufnr = vim.fn.bufnr(find_rtp_file('doc/' .. best_entry.filename), true)
vim.api.nvim_buf_set_option(new_bufnr, 'filetype', 'help')
vim.api.nvim_win_set_buf(status.preview_win, new_bufnr)