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Move functions working on buffer text to own module

This commit is contained in:
Marty Oehme 2021-05-03 23:21:58 +02:00
parent 4e3d364d17
commit 2ff3a0b299
Signed by: Marty
GPG Key ID: B7538B8F50A1C800
3 changed files with 94 additions and 125 deletions
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132
lua/zettelkasten/action.lua
View File

@ -3,6 +3,7 @@ local A = {}
local o = require 'zettelkasten.options'
local l = require 'zettelkasten.link'
local f = require 'zettelkasten.files'
local t = require 'zettelkasten.text'
-- Opens the link passed in in the editor's current buffer.
-- Requires a link object passed in.
@ -25,145 +26,26 @@ function A.open_selected(style)
local ln
if st == 'line' then
ln = A.get_next_link_on_line(links, curpos)
ln = t.get_next_link_on_line(links, curpos)
elseif st == 'cursor' then
ln = A.get_link_under_cursor(links, curpos)
ln = t.get_link_under_cursor(links, curpos)
end
A.open(ln)
end
-- Returns visually selected text and cursor column where selection starts.
-- Works with selections over multiple lines, but will only return the
-- starting line, as well as the starting line's text.
local function get_current_selection()
local line, start_col, end_col = vim.fn.getpos("'<")[2],
vim.fn.getpos("'<")[3],
vim.fn.getpos("'>")[3]
local selection = vim.fn.getline(line, line)[1]:sub(start_col, end_col)
return selection, start_col
end
-- Returns word currently under cursor and cursor column where
-- the word begins.
-- If big argument resolves to true, it will get the whitespace
-- delimited word, otherwise the vim specified wordboundary word.
local function get_current_word(big)
local pattern = [[\k]]
if not big then pattern = [[\S]] end
local cur_col = vim.api.nvim_win_get_cursor(0)[2]
local line = vim.api.nvim_get_current_line()
local word_before_cur = vim.fn.matchstrpos(line:sub(1, cur_col + 1),
pattern .. "*$")
local word_start_col = word_before_cur[2] + 1
word_before_cur = word_before_cur[1]
local word_after_cur = vim.fn.matchstr(line:sub(cur_col + 1),
"^" .. pattern .. "*"):sub(2)
return word_before_cur .. word_after_cur, word_start_col
end
-- Sanitizes the string before replacement, taking care of escaping any
-- characters that lua uses to signify patterns.
local function replace(str, patt, repl, n)
patt = string.gsub(patt, "[%(%)%.%+%-%*%?%[%]%^%$%%]", "%%%1")
repl = string.gsub(repl, "[%%]", "%%%%")
return string.gsub(str, patt, repl, n)
end
-- Replaces the input text on the current line with a zettel link.
-- Takes an optional initial column on which the text to be replaced starts,
-- which can prevent falsely substituting the wrong text fragment if an
-- identical one exists earlier on the line.
local function replace_text_with_link(text, start_col)
local link = l.new(text)
local line_full = vim.api.nvim_get_current_line()
local line_edited
if start_col then
line_edited = line_full:sub(1, start_col - 1) ..
replace(line_full:sub(start_col), text, link, 1)
else
line_edited = replace(line_full, text, link, 1)
end
return line_edited
end
-- Replaces the current text context with a link to a new zettel.
-- The current context is the visual selection (if called from visual mode)
-- or the (big) word under the cursor if called from any other mode.
function A.link(visual)
local selection, start_col
if visual or vim.api.nvim_get_mode()['mode'] == "v" then
selection, start_col = get_current_selection()
selection, start_col = t.get_current_selection()
else
selection, start_col = get_current_word()
selection, start_col = t.get_current_word()
end
vim.api.nvim_set_current_line(replace_text_with_link(selection, start_col))
end
-- Returns the link currently under cursor, roughly the vim equivalent of yiW.
-- Works for links containing spaces in their text or reference link.
function A.get_link_under_cursor(links, curpos)
for _, link in pairs(links) do
if link.startpos <= curpos + 1 and link.endpos > curpos then
return link
end
end
return nil
end
-- Returns the next link of the current line from the cursor onwards.
function A.get_next_link_on_line(links, curpos)
local nearestpos = math.huge
local nearestlink
for _, ln in pairs(links) do
if ln.endpos > curpos and ln.endpos < nearestpos then
nearestpos = ln.endpos
nearestlink = ln
end
end
return nearestlink
vim.api.nvim_set_current_line(t.replace_text(selection, l.new(selection),
start_col))
end
return {open = A.open, open_selected = A.open_selected, link = A.link}
--- local function get_selection()
--- s_start = vim.fn.line("'<") - 1
--- s_end = vim.fn.line("'>")
--- return vim.api.nvim_buf_get_lines(0, s_start, s_end, true)
--- end
--
--- -- UGLY HACKS ABOUND
--- function ZK.create_zettel()
--- -- get line and its number
--- local selection
--- local line = vim.api.nvim_get_current_line()
--- local linenr = vim.api.nvim_win_get_cursor(0)[1]
--
--- -- get words under cursor / selected
--- local mode = vim.api.nvim_get_mode()['mode']
--- if mode == "n" then
--- print(vim.fn.line("'<'") - 1)
--- selection = vim.fn.expand("<cWORD>")
--- -- NOT WORKING YET
--- elseif mode == "v" then
--- selection = get_selection()
--- else
--- return
--- end
--
--- -- get valid link
--- local link = l.create(nil, selection)
--
--- -- create new line with selection replaced in middle
--- local st, en = line:find(selection, 0, true)
--- local repl_line = line:sub(1, st - 1) .. link .. line:sub(en + 1)
--
--- -- replace existing line in favor of new one
--- vim.api.nvim_buf_set_lines(0, linenr - 1, linenr, true, {repl_line})
--- end

1
lua/zettelkasten/options.lua
View File

@ -29,6 +29,7 @@ local anchor_defaults = {
-- TODO zettel_root = vim.g["zettel_root"] or vim.b["zettel_root"] or "~/documents/notes",
-- TODO zettel_anchor_pattern = regex? -> needs custom creation function in `create_anchor`
-- TODO refer to option name in error as well if something is not set correctly
local function must_contain(set, value, name)
if type(set) ~= "table" then return false end
if not set[value] then

86
lua/zettelkasten/text.lua Normal file
View File

@ -0,0 +1,86 @@
local T = {}
-- Returns visually selected text and cursor column where selection starts.
-- Works with selections over multiple lines, but will only return the
-- starting line, as well as the starting line's text.
function T.get_current_selection()
local line, start_col, end_col = vim.fn.getpos("'<")[2],
vim.fn.getpos("'<")[3],
vim.fn.getpos("'>")[3]
local selection = vim.fn.getline(line, line)[1]:sub(start_col, end_col)
return selection, start_col
end
-- Returns word currently under cursor and cursor column where
-- the word begins.
-- If big argument resolves to true, it will get the whitespace
-- delimited word, otherwise the vim specified wordboundary word.
function T.get_current_word(big)
local pattern = [[\k]]
if not big then
pattern = [[\S]]
end
local cur_col = vim.api.nvim_win_get_cursor(0)[2]
local line = vim.api.nvim_get_current_line()
local word_before_cur = vim.fn.matchstrpos(line:sub(1, cur_col + 1), pattern .. "*$")
local word_start_col = word_before_cur[2] + 1
word_before_cur = word_before_cur[1]
local word_after_cur = vim.fn.matchstr(line:sub(cur_col + 1), "^" .. pattern .."*"):sub(2)
return word_before_cur .. word_after_cur, word_start_col
end
-- Returns the link currently under cursor, roughly the vim equivalent of yiW.
-- Works for links containing spaces in their text or reference link.
function T.get_link_under_cursor(links, curpos)
for _, link in pairs(links) do
if link.startpos <= curpos + 1 and link.endpos > curpos then
return link
end
end
return nil
end
-- Returns the next link of the current line from the cursor onwards.
function T.get_next_link_on_line(links, curpos)
local nearestpos = math.huge
local nearestlink
for _, link in pairs(links) do
if link.endpos > curpos and link.endpos < nearestpos then
nearestpos = link.endpos
nearestlink = link
end
end
return nearestlink
end
-- Sanitizes the string before replacement, taking care of escaping any
-- characters that lua uses to signify patterns.
local function replace(str, patt, repl, n)
patt = string.gsub(patt, "[%(%)%.%+%-%*%?%[%]%^%$%%]", "%%%1")
repl = string.gsub(repl, "[%%]", "%%%%")
return string.gsub(str, patt, repl, n)
end
-- Replaces the input text on the current line with new text.
-- Takes an optional initial column on which the text to be replaced starts,
-- which can prevent falsely substituting the wrong text fragment if an
-- identical one exists earlier on the line. (E.g. I want to replace the
-- second 'test' in 'test test 1 2 3').
function T.replace_text(text, new_text, start_col)
local line_full = vim.api.nvim_get_current_line()
local line_edited
if start_col then
line_edited = line_full:sub(1, start_col - 1) ..
replace(line_full:sub(start_col), text, new_text, 1)
else
line_edited = replace(line_full, text, new_text, 1)
end
return line_edited
end
return T