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feat: Live previews (peek editor)

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Disabled by default, but if this feature turns out to be useful and
stable, it will replace the old preview window.
This commit is contained in:
hedy
2023-11-28 20:50:08 +08:00
parent 20cb9ef8dc
commit 884486f3d0
6 changed files with 242 additions and 89 deletions
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1
lua/outline/config.lua
View File

@@ -48,6 +48,7 @@ M.defaults = {
center_on_jump = true,
},
preview_window = {
live = false,
auto_preview = false,
width = 50,
min_width = 50,

6
lua/outline/init.lua
View File

@@ -24,8 +24,12 @@ local function setup_global_autocmd()
pattern = '*',
callback = function()
local s = M._get_sidebar()
local w = vim.api.nvim_get_current_win()
if s and s.preview then
s.preview:close()
-- Don't close preview when entering preview!
if not s.preview.win or s.preview.win ~= w then
s.preview:close()
end
end
end,
})

279
lua/outline/preview.lua
View File

@@ -1,7 +1,8 @@
local cfg = require('outline.config')
local providers = require('outline.providers')
local conf
-- A floating window to preview the location of a symbol from the outline.
-- Classical preview reads entire lines into a new buffer for preview. Live
-- preview sets the buffer of floating window to the code buffer, which allows
-- focusing by pressing the preview keymap again, to edit the buffer at that
-- position.
---@class outline.Preview
local Preview = {}
@@ -9,77 +10,53 @@ local Preview = {}
---@class outline.Preview
---@field buf integer
---@field win integer
---@field width integer
---@field height integer
---@field width integer
---@field outline_height integer
---@field s outline.Sidebar
---@field conf table
---@param s outline.Sidebar
function Preview:new(s)
-- Config must have been setup when calling Preview:new
conf = cfg.o.preview_window
return setmetatable({
buf = nil,
win = nil,
s = s,
width = nil,
height = nil,
}, { __index = Preview })
end
---@class outline.LivePreview
local LivePreview = {}
---Creates new preview window and sets the content. Calls setup and set_lines.
function Preview:create()
self.buf = vim.api.nvim_create_buf(false, true)
vim.api.nvim_buf_attach(self.buf, false, {
on_detach = function()
self.buf = nil
self.win = nil
end,
})
-- FIXME: Re-calculate dimensions on update-preview, in case outline window
-- was resized between last preview and next preview?
self.outline_height = vim.api.nvim_win_get_height(self.s.view.win)
self.width = conf.width
self.height = math.max(math.ceil(self.outline_height / 2), conf.min_height)
self.win = vim.api.nvim_open_win(self.buf, false, {
relative = 'editor',
height = self.height,
width = self.width,
bufpos = { 0, 0 },
col = self:calc_col(),
row = self:calc_row(),
border = conf.border,
})
self:setup()
self:set_lines()
end
---@class outline.LivePreview
---@field win integer
---@field codewin integer
---@field codebuf integer
---@field height integer
---@field width integer
---@field outline_height integer
---@field s outline.Sidebar
---@field last_node outline.FlatSymbol
---@field initial_cursorline boolean
---@field conf table
---Set up highlights, window, and buffer options
function Preview:setup()
vim.api.nvim_win_set_option(self.win, 'winhl', conf.winhl)
vim.api.nvim_win_set_option(self.win, 'winblend', conf.winblend)
local code_buf = self.s.code.buf
local ft = vim.api.nvim_buf_get_option(code_buf, 'filetype')
vim.api.nvim_buf_set_option(self.buf, 'syntax', ft)
local ts_highlight_fn = vim.treesitter.start
if not _G._outline_nvim_has[8] then
local ok, ts_highlight = pcall(require, 'nvim-treesitter.highlight')
if ok then
ts_highlight_fn = ts_highlight.attach
end
---@param conf table
function Preview:new(conf)
if conf.live == true then
return setmetatable({
conf = conf,
win = nil,
width = nil,
height = nil,
}, { __index = LivePreview })
else
return setmetatable({
conf = conf,
buf = nil,
win = nil,
width = nil,
height = nil,
}, { __index = Preview })
end
pcall(ts_highlight_fn, self.buf, ft)
vim.api.nvim_buf_set_option(self.buf, 'bufhidden', 'delete')
vim.api.nvim_win_set_option(self.win, 'cursorline', true)
vim.api.nvim_buf_set_option(self.buf, 'modifiable', false)
end
---Get the correct column to place the floating window based on relative
---positions of the outline and the code window.
function Preview:calc_col()
---@param self outline.Preview|outline.LivePreview
local function calc_col(self)
-- TODO: Re-calculate dimensions on update-preview, in case outline window
-- was resized between last preview and next preview?
---@type integer
local outline_winnr = self.s.view.win
local outline_col = vim.api.nvim_win_get_position(outline_winnr)[2]
@@ -99,20 +76,63 @@ function Preview:calc_col()
end
---Get the vertically center-aligned row for preview window
function Preview:calc_row()
---@param self outline.Preview|outline.LivePreview
local function calc_row(self)
local offset = math.floor((self.outline_height - self.height) / 2) - 1
return vim.api.nvim_win_get_position(self.s.view.win)[1] + offset
end
---Set and update preview buffer content
function Preview:set_lines()
-- TODO: Editable, savable buffer in the preview like VS Code for quick
-- edits? It can be like LSP. Trigger preview to open, trigger again to focus
-- (so buffer can be edited).
-- This can be achieved by simply opening the buffer from inside the preview
-- window.
-- This also removes the need of manually setting highlights, treesitter etc.
-- The preview window will look exactly the same as in the code window.
function Preview:create()
self.buf = vim.api.nvim_create_buf(false, true)
vim.api.nvim_buf_attach(self.buf, false, {
on_detach = function()
self.buf = nil
self.win = nil
end,
})
self.outline_height = vim.api.nvim_win_get_height(self.s.view.win)
self.width = self.conf.width
self.height = math.max(math.ceil(self.outline_height / 2), self.conf.min_height)
self.win = vim.api.nvim_open_win(self.buf, false, {
relative = 'editor',
height = self.height,
width = self.width,
bufpos = { 0, 0 },
col = calc_col(self),
row = calc_row(self),
border = self.conf.border,
focusable = false,
})
self:setup()
self:update()
end
---Set buf & win options, and setup highlight
function Preview:setup()
vim.api.nvim_win_set_option(self.win, 'winhl', self.conf.winhl)
vim.api.nvim_win_set_option(self.win, 'winblend', self.conf.winblend)
local code_buf = self.s.code.buf
local ft = vim.api.nvim_buf_get_option(code_buf, 'filetype')
vim.api.nvim_buf_set_option(self.buf, 'syntax', ft)
local ts_highlight_fn = vim.treesitter.start
if not _G._outline_nvim_has[8] then
local ok, ts_highlight = pcall(require, 'nvim-treesitter.highlight')
if ok then
ts_highlight_fn = ts_highlight.attach
end
end
pcall(ts_highlight_fn, self.buf, ft)
vim.api.nvim_buf_set_option(self.buf, 'bufhidden', 'delete')
vim.api.nvim_buf_set_option(self.buf, 'modifiable', false)
vim.api.nvim_win_set_option(self.win, 'cursorline', true)
end
function Preview:update()
local node = self.s:_current_node()
if not node then
return
@@ -133,24 +153,17 @@ function Preview:show()
return
end
if self.buf and self.win then
self:set_lines()
else
if not self.buf or not self.win then
self:create()
end
if conf.open_hover_on_preview then
providers.action(self.s, 'show_hover', { self.s })
else
self:update()
end
end
function Preview:close()
-- TODO: Why was this in symbols-outline.nvim?
-- if self.s:has_code_win() then
if self.win ~= nil and vim.api.nvim_win_is_valid(self.win) then
vim.api.nvim_win_close(self.win, true)
end
-- end
end
function Preview:toggle()
@@ -161,4 +174,102 @@ function Preview:toggle()
end
end
---Creates new preview window and sets the content. Calls setup and set_lines.
function LivePreview:create()
self.codewin = self.s.code.win
self.initial_cursorline = vim.api.nvim_win_get_option(self.s.code.win, 'cursorline')
self.outline_height = vim.api.nvim_win_get_height(self.s.view.win)
self.width = self.conf.width
self.height = math.max(math.ceil(self.outline_height / 2), self.conf.min_height)
self.win = vim.api.nvim_open_win(self.s.code.buf, false, {
relative = 'editor',
height = self.height,
width = self.width,
bufpos = { 0, 0 },
col = calc_col(self),
row = calc_row(self),
border = self.conf.border,
-- Setting this to disallow using other methods to focus on this window,
-- because currently the autocmds from setup() isn't triggering if user did
-- not use close() and focus().
focusable = false,
})
self:setup()
end
---Set buf & win options, and autocmds
function LivePreview:setup()
vim.api.nvim_win_set_option(self.win, 'winhl', self.conf.winhl)
vim.api.nvim_win_set_option(self.win, 'winblend', self.conf.winblend)
vim.api.nvim_win_set_option(self.win, 'cursorline', true)
vim.api.nvim_create_autocmd('WinClosed', {
pattern = tostring(self.win),
once = true,
callback = function()
self.s.code.win = self.codewin
self.win = nil
end
})
vim.api.nvim_create_autocmd('WinEnter', {
pattern = tostring(self.win),
once = true,
callback = function()
-- This doesn't work at all?
vim.api.nvim_win_set_option(self.win, 'cursorline', self.initial_cursorline)
end
})
end
function LivePreview:update(node)
vim.api.nvim_win_set_buf(self.win, self.s.code.buf)
vim.api.nvim_win_set_cursor(self.win, { node.line + 1, node.character })
end
function LivePreview:focus()
vim.api.nvim_set_current_win(self.win)
-- Remove this when the autocmd for WinEnter works above
vim.api.nvim_win_set_option(self.win, 'cursorline', self.initial_cursorline)
end
---Create, focus, or update preview
function LivePreview:show()
if not self.s:has_focus() or #vim.api.nvim_list_wins() < 2 then
return
end
local node = self.s:_current_node()
if not node then
return
end
if not self.win then
self:create()
vim.api.nvim_win_set_cursor(self.win, { node.line + 1, node.character })
self.last_node = node
return
end
if node == self.last_node then
self:focus()
else
self:update(node)
end
self.last_node = node
end
function LivePreview:close()
if self.win ~= nil then
vim.api.nvim_win_close(self.win, true)
-- autocmd from setup is not triggered here?
self.win = nil
self.s.code.win = self.codewin
end
end
function LivePreview:toggle()
self:show()
end
return Preview

14
lua/outline/sidebar.lua
View File

@@ -26,13 +26,13 @@ local Sidebar = {}
---@field code outline.SidebarCodeState
---@field augroup integer
---@field provider outline.Provider?
---@field preview outline.Preview
---@field preview outline.Preview|outline.LivePreview
function Sidebar:new(id)
return setmetatable({
id = id,
view = View:new(),
preview = Preview:new(),
preview = Preview:new(cfg.o.preview_window),
code = { buf = 0, win = 0 },
items = {},
flats = {},
@@ -138,7 +138,6 @@ function Sidebar:setup_keymaps()
goto_and_close = { '_goto_and_close', {} },
down_and_jump = { '_move_and_jump', { 'down' } },
up_and_jump = { '_move_and_jump', { 'up' } },
toggle_preview = { function() self.preview:toggle() end, {} },
fold_toggle = { '_toggle_fold', {} },
fold = { '_set_folded', { true } },
unfold = { '_set_folded', { false } },
@@ -159,6 +158,14 @@ function Sidebar:setup_keymaps()
---@diagnostic disable-next-line param-type-mismatch
self:nmap(name, meth[1], meth[2])
end
local toggle_preview
if cfg.o.preview_window.auto_preview and cfg.o.preview_window.live then
toggle_preview = { function() self.preview:focus() end, {} }
else
toggle_preview = { function() self.preview:toggle() end, {} }
end
self:nmap('toggle_preview', toggle_preview[1], toggle_preview[2])
end
-- stylua: ignore end
@@ -240,7 +247,6 @@ function Sidebar:update_cursor_style()
-- Set cursor color to CursorLine in normal mode
if hide_cursor then
self.original_cursor = vim.o.guicursor
local cur = vim.o.guicursor:match('n.-:(.-)[-,]')
vim.opt.guicursor:append('n:' .. cur .. '-Cursorline')
end