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-- mod-version:3
local core = require "core"
local command = require "core.command"
local DocView = require "core.docview"
local function check_doc()
local av = core.active_view
return av:is(DocView) and #av.doc.selections > 4
end
-- returns:
-- * if the doc has selections
-- * if the selections span multiple lines
local function doc_get_selection_status(doc)
local selections = false
for _,line1,col1,line2,col2 in doc:get_selections() do
if line1 ~= line2 then
return true, true
end
if col1 ~= col2 then
selections = true
end
end
return selections, false
end
local function has_selections()
if not check_doc() then return false end
local selections, has_multilines = doc_get_selection_status(core.active_view.doc)
-- we want this to be true if there are only single lines selections
return selections and not has_multilines
end
local function has_no_selections()
if not check_doc() then return false end
return not doc_get_selection_status(core.active_view.doc)
end
local function align(right)
local doc = core.active_view.doc
local max_col = 0
local done = { }
-- get alignment column
for _,line1,col1,_,col2 in doc:get_selections(true) do
-- only use the first caret in a line
if not done[line1] then
done[line1] = true
max_col = math.max(max_col, right and col2 or col1)
end
end
done = { }
for idx,line1,col1,line2,col2 in doc:get_selections(true) do
-- only align the first caret in a line
if not done[line1] then
done[line1] = true
local diff = max_col - (right and col2 or col1)
if diff > 0 then
doc:insert(line1, col1, string.rep(" ", diff))
end
doc:set_selections(idx, line1, col1 + diff, line2, col2 + diff, right)
end
end
end
command.add(has_no_selections, {
["doc:align-carets"] = align,
})
command.add(has_selections, {
["doc:left-align-selections"] = align,
["doc:right-align-selections"] = function() align(true) end,
})
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