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-- mod-version:3
-- Markers plugin for lite text editor
-- original implementation by Petri Häkkinen
local core = require "core"
local command = require "core.command"
local keymap = require "core.keymap"
local style = require "core.style"
local DocView = require "core.docview"
local Doc = require "core.doc"
local cache = {} -- this table contains subtables for each document, each subtable is a set of line numbers
setmetatable(cache, {
__mode = "k",
__index = function(t, k)
t[k] = {}
return t[k]
end,
})
local function shift_lines(doc, at, diff)
if diff == 0 then return end
local t = {}
for line in pairs(cache[doc]) do
line = line >= at and line + diff or line
t[line] = true
end
cache[doc] = t
end
local raw_insert = Doc.raw_insert
function Doc:raw_insert(line, col, text, ...)
raw_insert(self, line, col, text, ...)
local line_count = 0
for _ in text:gmatch("\n") do
line_count = line_count + 1
end
shift_lines(self, line, line_count)
end
local raw_remove = Doc.raw_remove
function Doc:raw_remove(line1, col1, line2, col2, ...)
raw_remove(self, line1, col1, line2, col2, ...)
shift_lines(self, line2, line1 - line2)
end
local draw_line_gutter = DocView.draw_line_gutter
function DocView:draw_line_gutter(line, x, y, width)
if cache[self.doc] and cache[self.doc][line] then
local h = self:get_line_height()
renderer.draw_rect(x, y, style.padding.x * 0.4, h, style.selection)
end
return draw_line_gutter(self, line, x, y, width)
end
command.add("core.docview!", {
["markers:toggle-marker"] = function(dv)
local doc = dv.doc
local line = doc:get_selection()
local markers = cache[doc]
if markers[line] then
markers[line] = nil
else
markers[line] = true
end
end,
["markers:go-to-next-marker"] = function(dv)
local doc = dv.doc
local line = doc:get_selection()
local markers = cache[doc]
local first_marker = math.huge
local next_marker = math.huge
for l, _ in pairs(markers) do
if l > line and l < next_marker then
next_marker = l
end
first_marker = math.min(first_marker, l)
end
if next_marker == math.huge then
next_marker = first_marker
end
if next_marker ~= math.huge then
doc:set_selection(next_marker, 1)
core.active_view:scroll_to_line(next_marker, true)
end
end,
})
keymap.add {
["ctrl+f2"] = "markers:toggle-marker",
["f2"] = "markers:go-to-next-marker",
}
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