119 lines
3.1 KiB
Lua
119 lines
3.1 KiB
Lua
-- mod-version:3
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local common = require "core.common"
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local config = require "core.config"
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local command = require "core.command"
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local Doc = require "core.doc"
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---@class config.plugins.trimwhitespace
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---@field enabled boolean
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---@field trim_empty_end_lines boolean
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config.plugins.trimwhitespace = common.merge({
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enabled = false,
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trim_empty_end_lines = false,
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config_spec = {
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name = "Trim Whitespace",
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{
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label = "Enabled",
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description = "Disable or enable the trimming of white spaces by default.",
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path = "enabled",
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type = "toggle",
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default = false
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},
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{
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label = "Trim Empty End Lines",
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description = "Remove any empty new lines at the end of documents.",
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path = "trim_empty_end_lines",
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type = "toggle",
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default = false
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}
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}
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}, config.plugins.trimwhitespace)
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---@class plugins.trimwhitespace
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local trimwhitespace = {}
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---Disable whitespace trimming for a specific document.
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---@param doc core.doc
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function trimwhitespace.disable(doc)
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doc.disable_trim_whitespace = true
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end
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---Re-enable whitespace trimming if previously disabled.
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---@param doc core.doc
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function trimwhitespace.enable(doc)
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doc.disable_trim_whitespace = nil
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end
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---Perform whitespace trimming in all lines of a document except the
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---line where the caret is currently positioned.
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---@param doc core.doc
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function trimwhitespace.trim(doc)
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local cline, ccol = doc:get_selection()
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for i = 1, #doc.lines do
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local old_text = doc:get_text(i, 1, i, math.huge)
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local new_text = old_text:gsub("%s*$", "")
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-- don't remove whitespace which would cause the caret to reposition
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if cline == i and ccol > #new_text then
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new_text = old_text:sub(1, ccol - 1)
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end
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if old_text ~= new_text then
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doc:insert(i, 1, new_text)
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doc:remove(i, #new_text + 1, i, math.huge)
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end
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end
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end
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---Removes all empty new lines at the end of the document.
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---@param doc core.doc
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---@param raw_remove? boolean Perform the removal not registering to undo stack
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function trimwhitespace.trim_empty_end_lines(doc, raw_remove)
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for _=#doc.lines, 1, -1 do
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local l = #doc.lines
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if l > 1 and doc.lines[l] == "\n" then
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local current_line = doc:get_selection()
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if current_line == l then
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doc:set_selection(l-1, math.huge, l-1, math.huge)
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end
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if not raw_remove then
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doc:remove(l-1, math.huge, l, math.huge)
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else
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table.remove(doc.lines, l)
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end
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else
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break
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end
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end
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end
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command.add("core.docview", {
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["trim-whitespace:trim-trailing-whitespace"] = function(dv)
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trimwhitespace.trim(dv.doc)
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end,
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["trim-whitespace:trim-empty-end-lines"] = function(dv)
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trimwhitespace.trim_empty_end_lines(dv.doc)
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end,
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})
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local doc_save = Doc.save
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Doc.save = function(self, ...)
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if
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config.plugins.trimwhitespace.enabled
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and
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not self.disable_trim_whitespace
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then
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trimwhitespace.trim(self)
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if config.plugins.trimwhitespace.trim_empty_end_lines then
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trimwhitespace.trim_empty_end_lines(self)
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end
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end
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doc_save(self, ...)
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end
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return trimwhitespace
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