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fix: (terminal) buffer previewer (#1120)

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Use existing buffers for buffer previewer to allow previewing special buffer types
This commit is contained in:
fdschmidt93
2021-08-23 15:27:11 +02:00
committed by GitHub
parent 03c2b8f6bb
commit 79dc995f82
6 changed files with 129 additions and 30 deletions
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136
lua/telescope/previewers/buffer_previewer.lua
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@@ -81,6 +81,19 @@ local search_teardown = function(self)
end
end
local scroll_fn = function(self, direction)
if not self.state then
return
end
local input = direction > 0 and [[]] or [[]]
local count = math.abs(direction)
vim.api.nvim_win_call(self.state.winid, function()
vim.cmd([[normal! ]] .. count .. input)
end)
end
previewers.file_maker = function(filepath, bufnr, opts)
opts = opts or {}
if opts.use_ft_detect == nil then
@@ -282,18 +295,7 @@ previewers.new_buffer_previewer = function(opts)
end
if not opts.scroll_fn then
function opts.scroll_fn(self, direction)
if not self.state then
return
end
local input = direction > 0 and [[]] or [[]]
local count = math.abs(direction)
vim.api.nvim_buf_call(self.state.bufnr, function()
vim.cmd([[normal! ]] .. count .. input)
end)
end
opts.scroll_fn = scroll_fn
end
return Previewer:new(opts)
@@ -370,19 +372,12 @@ previewers.vimgrep = defaulter(function(opts)
pcall(vim.api.nvim_buf_clear_namespace, self.state.last_set_bufnr, ns_previewer, 0, -1)
end
-- Workaround for unnamed buffer when using builtin.buffer
if entry.bufnr and (p == "[No Name]" or vim.api.nvim_buf_get_option(entry.bufnr, "buftype") ~= "") then
local lines = vim.api.nvim_buf_get_lines(entry.bufnr, 0, -1, false)
vim.api.nvim_buf_set_lines(self.state.bufnr, 0, -1, false, lines)
jump_to_line(self, self.state.bufnr, entry.lnum)
else
conf.buffer_previewer_maker(p, self.state.bufnr, {
bufname = self.state.bufname,
callback = function(bufnr)
jump_to_line(self, bufnr, entry.lnum)
end,
})
end
conf.buffer_previewer_maker(p, self.state.bufnr, {
bufname = self.state.bufname,
callback = function(bufnr)
jump_to_line(self, bufnr, entry.lnum)
end,
})
end,
}
end, {})
@@ -872,4 +867,95 @@ previewers.display_content = defaulter(function(_)
}
end, {})
previewers.buffers = defaulter(function(opts)
opts = opts or {}
local cwd = opts.cwd or vim.loop.cwd()
local previewer_active = true -- decouple provider from preview_win
return Previewer:new {
title = function()
return "Buffers"
end,
setup = function(_, status)
local win_id = status.picker.original_win_id
-- required because of see `:h local-options` as
-- buffers not yet attached to a current window take the options from the `minimal` popup ...
local state = {
["previewed_buffers"] = {},
["winid"] = status.preview_win,
["win_options"] = {
["colorcolumn"] = vim.api.nvim_win_get_option(win_id, "colorcolumn"),
["cursorline"] = vim.api.nvim_win_get_option(win_id, "cursorline"),
["foldlevel"] = vim.api.nvim_win_get_option(win_id, "foldlevel"),
["list"] = vim.api.nvim_win_get_option(win_id, "list"),
["number"] = vim.api.nvim_win_get_option(win_id, "number"),
["relativenumber"] = vim.api.nvim_win_get_option(win_id, "relativenumber"),
["signcolumn"] = vim.api.nvim_win_get_option(win_id, "signcolumn"),
["spell"] = vim.api.nvim_win_get_option(win_id, "spell"),
["winhl"] = vim.api.nvim_win_get_option(win_id, "winhl"),
["wrap"] = vim.api.nvim_win_get_option(win_id, "wrap"),
},
}
-- TODO clear explicitly once API should become available
-- decoration provider is hierachical on_start -> win
vim.api.nvim_set_decoration_provider(ns_previewer, {
on_start = function()
-- defacto disable provider if status.preview_win does not exist anymore
return previewer_active
end,
on_win = function(_, winid, bufnr, _)
if winid ~= status.preview_win then
return false -- skip setting extmark for any window other than status.preview_win
end
local lnum, _ = unpack(vim.api.nvim_win_get_cursor(winid))
local line = vim.api.nvim_buf_get_lines(bufnr, lnum - 1, lnum, false)[1]
-- only set if winid and rows are matching
pcall(vim.api.nvim_buf_set_extmark, bufnr, ns_previewer, lnum - 1, 0, {
end_col = #line,
virt_text_pos = "overlay",
hl_group = "TelescopePreviewLine",
ephemeral = true,
priority = 101, -- 1 higher than treesitter
})
end,
})
return state
end,
teardown = function(self)
-- reapply proper buffer-window options..
for opt, value in pairs(self.state.win_options) do
vim.api.nvim_win_set_option(self.state.winid, opt, value)
end
-- TODO precautious clearing of extmark though likely no effect due to ephemeral
-- clear extmarks for previewed buffers
for buf, _ in pairs(self.state.previewed_buffers) do
if vim.api.nvim_buf_is_valid(buf) then
vim.api.nvim_buf_clear_namespace(buf, ns_previewer, 0, -1)
end
end
previewer_active = false
end,
dyn_title = function(_, entry)
return Path:new(from_entry.path(entry, true)):normalize(cwd)
end,
preview_fn = function(self, entry, status)
if vim.api.nvim_buf_is_valid(entry.bufnr) then
vim.api.nvim_win_set_buf(status.preview_win, entry.bufnr)
vim.api.nvim_win_set_option(status.preview_win, "winhl", "Normal:TelescopePreviewNormal")
vim.api.nvim_win_set_option(status.preview_win, "signcolumn", "no")
vim.api.nvim_win_set_option(status.preview_win, "foldlevel", 100)
vim.api.nvim_win_set_option(status.preview_win, "wrap", false)
self.state.bufnr = entry.bufnr
if not entry.col then
local _, col = unpack(vim.api.nvim_win_get_cursor(status.preview_win))
entry.col = col + 1
end
if self.state.previewed_buffers[entry.bufnr] ~= true then
self.state.previewed_buffers[entry.bufnr] = true
end
end
end,
scroll_fn = scroll_fn,
}
end, {})
return previewers