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-- Copyright 2007-2010 Mitchell mitchell<att>caladbolg.net. See LICENSE.
local L = _G.locale.localize
---
-- Session support for the textadept module.
module('_m.textadept.session', package.seeall)
-- Markdown:
-- ## Settings
--
-- * `DEFAULT_SESSION`: The path to the default session file.
-- * `SAVE_ON_QUIT`: Save the session when quitting. Defaults to true and can be
-- disabled by passing the command line switch '-n' or '--nosession' to
-- Textadept.
-- settings
DEFAULT_SESSION = _USERHOME..'/session'
SAVE_ON_QUIT = true
-- end settings
---
-- Loads a Textadept session file.
-- Textadept restores split views, opened buffers, cursor information, and
-- project manager details.
-- @param filename The absolute path to the session file to load. Defaults to
-- DEFAULT_SESSION if not specified.
-- @return true if the session file was opened and read; false otherwise.
-- @usage _m.textadept.session.load(filename)
function load(filename)
local not_found = {}
local f = io.open(filename or DEFAULT_SESSION, 'rb')
if not f then
io.close_all()
return false
end
local current_view, splits = 1, { [0] = {} }
local lfs_attributes = lfs.attributes
for line in f:lines() do
if line:find('^buffer:') then
local anchor, current_pos, first_visible_line, filename =
line:match('^buffer: (%d+) (%d+) (%d+) (.+)$')
if not filename:find('^%[.+%]$') then
if lfs_attributes(filename) then
io.open_file(filename)
else
not_found[#not_found + 1] = filename
end
else
new_buffer()
buffer._type = filename
events.emit('file_opened', filename)
end
-- Restore saved buffer selection and view.
local anchor = tonumber(anchor) or 0
local current_pos = tonumber(current_pos) or 0
local first_visible_line = tonumber(first_visible_line) or 0
local buffer = buffer
buffer._anchor, buffer._current_pos = anchor, current_pos
buffer._first_visible_line = first_visible_line
buffer:line_scroll(0,
buffer:visible_from_doc_line(first_visible_line))
buffer:set_sel(anchor, current_pos)
elseif line:find('^%s*split%d:') then
local level, num, type, size =
line:match('^(%s*)split(%d): (%S+) (%d+)')
local view = splits[#level] and splits[#level][tonumber(num)] or view
splits[#level + 1] = { view:split(type == 'true') }
splits[#level + 1][1].size = tonumber(size) -- could be 1 or 2
elseif line:find('^%s*view%d:') then
local level, num, buf_idx = line:match('^(%s*)view(%d): (%d+)$')
local view = splits[#level][tonumber(num)] or view
buf_idx = tonumber(buf_idx)
if buf_idx > #_BUFFERS then buf_idx = #_BUFFERS end
view:goto_buffer(buf_idx)
elseif line:find('^current_view:') then
local view_idx = line:match('^current_view: (%d+)')
current_view = tonumber(view_idx) or 1
elseif line:find('^size:') then
local width, height = line:match('^size: (%d+) (%d+)$')
if width and height then gui.size = { width, height } end
end
end
f:close()
_VIEWS[current_view]:focus()
_SESSIONFILE = filename or DEFAULT_SESSION
if #not_found > 0 then
gui.dialog('msgbox',
'--title', L('Session Files Not Found'),
'--text', L('The following session files were not found'),
'--informative-text',
string.format('%s', table.concat(not_found, '\n')))
end
return true
end
events.connect('arg_none', -- load session when no args are present
function() if SAVE_ON_QUIT then load() end end)
---
-- Saves a Textadept session to a file.
-- Saves split views, opened buffers, cursor information, and project manager
-- details.
-- @param filename The absolute path to the session file to save. Defaults to
-- either the current session file or DEFAULT_SESSION if not specified.
-- @usage _m.textadept.session.save(filename)
function save(filename)
local session = {}
local buffer_line = "buffer: %d %d %d %s" -- anchor, cursor, line, filename
local split_line = "%ssplit%d: %s %d" -- level, number, type, size
local view_line = "%sview%d: %d" -- level, number, doc index
-- Write out opened buffers.
for _, buffer in ipairs(_BUFFERS) do
local filename = buffer.filename or buffer._type
if filename then
local current = buffer.doc_pointer == gui.focused_doc_pointer
local anchor = current and 'anchor' or '_anchor'
local current_pos = current and 'current_pos' or '_current_pos'
local top_line = current and 'first_visible_line' or '_first_visible_line'
session[#session + 1] = buffer_line:format(buffer[anchor] or 0,
buffer[current_pos] or 0,
buffer[top_line] or 0,
filename)
end
end
-- Write out split views.
local function write_split(split, level, number)
local c1, c2 = split[1], split[2]
local vertical, size = tostring(split.vertical), split.size
local spaces = (' '):rep(level)
session[#session + 1] = split_line:format(spaces, number, vertical, size)
spaces = (' '):rep(level + 1)
if type(c1) == 'table' then
write_split(c1, level + 1, 1)
else
session[#session + 1] = view_line:format(spaces, 1, c1)
end
if type(c2) == 'table' then
write_split(c2, level + 1, 2)
else
session[#session + 1] = view_line:format(spaces, 2, c2)
end
end
local splits = gui.get_split_table()
if type(splits) == 'table' then
write_split(splits, 0, 0)
else
session[#session + 1] = view_line:format('', 1, splits)
end
-- Write out the current focused view.
local current_view = view
for i = 1, #_VIEWS do
if _VIEWS[i] == current_view then
current_view = i
break
end
end
session[#session + 1] = ("current_view: %d"):format(current_view)
-- Write out other things.
local size = gui.size
session[#session + 1] = ("size: %d %d"):format(size[1], size[2])
-- Write the session.
local f = io.open(filename or _SESSIONFILE or DEFAULT_SESSION, 'wb')
if f then
f:write(table.concat(session, '\n'))
f:close()
end
end
events.connect('quit', function() if SAVE_ON_QUIT then save() end end, 1)
local function no_session() SAVE_ON_QUIT = false end
args.register('-n', '--nosession', 0, no_session, 'No session functionality')
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