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| -rw-r--r-- | README.md | 1 | ||||
| -rw-r--r-- | plugins/indent_convert.lua | 128 |
2 files changed, 129 insertions, 0 deletions
@@ -45,6 +45,7 @@ Plugin | Description [`hidelinenumbers`](plugins/hidelinenumbers.lua?raw=1) | Hides the line numbers on the left of documents *([screenshot](https://user-images.githubusercontent.com/3920290/81692043-b8b19c00-9455-11ea-8d74-ad99be4b9c5f.png))* [`hidestatus`](plugins/hidestatus.lua?raw=1) | Hides the status bar at the bottom of the window ~~[`inanimate`](plugins/inanimate.lua?raw=1)~~ | Integrated in lite-xl using `config.transitions = false` ~~Disables all transition animations~~ +*[`indent_convert`](plugins/indent_convert.lua?raw=1)* | Convert between tabs and spaces indentation *[`indentguide`](plugins/indentguide.lua?raw=1)* | Adds indent guides *([screenshot](https://user-images.githubusercontent.com/3920290/79640716-f9860000-818a-11ea-9c3b-26d10dd0e0c0.png))* *[`Kinc Projects`](https://github.com/Kode-Community/kinc_plugin)** | Adds [Kinc](https://github.com/Kode/Kinc) Project generation with basic build commands(depends on [`console`](https://github.com/franko/console)) [`language_angelscript`](plugins/language_angelscript.lua?raw=1) | Syntax for the [Angelscript](https://www.angelcode.com/angelscript/) programming language diff --git a/plugins/indent_convert.lua b/plugins/indent_convert.lua new file mode 100644 index 0000000..c86686d --- /dev/null +++ b/plugins/indent_convert.lua @@ -0,0 +1,128 @@ +-- mod-version:2 -- lite-xl 2.0 +local core = require "core" +local config = require "core.config" +local command = require "core.command" + +config.plugins.indent_convert = { + update_indent_type = true -- set to false to avoid updating the document indent type +} + +local zero_pattern = _VERSION == "Lua 5.1" and "%z" or "\0" + +-- TODO: only set document indent type if there are no selections +-- TODO: correctly restore selections accounting for the offset caused by the conversion + +-- To replace N spaces with tabs, we match the last N spaces before the start of +-- the actual code and replace them with a tab. +-- We repeat this until we can't find any more spaces before the code. +-- The problem we encounter with this method is that if we have less than N +-- remaining spaces, those will end up at the start of the line. +-- Eg: +-- int main() { +-- __printf("Hello world\n"); +-- ___return 0; +-- } +-- +-- Becomes +-- int main() { +-- #printf("Hello world\n"); +-- _#return 0; +-- } +-- +-- Instead of +-- int main() { +-- #printf("Hello world\n"); +-- #_return 0; +-- } +-- With regex we could do something like +-- `regex.gsub("(^(?: {2})*)(?: {2})", "\\1\t")` +-- but the implementation of `regex.gsub` is very slow. +-- +-- The workaround is to find the longest possible repetition of N*X spaces and +-- use that information to replace the longest repetition of spaces starting +-- from the beginning of the line, then the second longest... +local function spaces_replacer(text, indent_size) + local spaces = string.rep(" ", indent_size) + local total = 0 + local n + local reps = 0 + -- find the longest repetition of indent_size*spaces + repeat + reps = reps + 1 + local s, _ = string.find(text, "%f[^"..zero_pattern.."\n]"..string.rep(spaces, reps)) + until not s + reps = reps - 1 + while reps > 0 do + text, n = string.gsub(text, + "(%f[^"..zero_pattern.."\n])("..string.rep(spaces, reps)..")", + "%1"..string.rep("\t", reps)) + total = total + n + reps = reps - 1 + end + return text, total +end + +local function tabs_replacer(text, indent_size) + local spaces = string.rep(" ", indent_size) + local total = 0 + local n + -- replace the last tab before the text until there aren't anymore + repeat + text, n = string.gsub(text, "(%f[^"..zero_pattern.."\n]\t*)(\t)", "%1"..spaces) + total = total + n + until n == 0 + return text, total +end + +local function replacer(doc, fn, indent_size) + return function(text) + return fn(text, indent_size) + end +end + +local function get_indent_size(doc) + local indent_size = config.indent_size + if type(doc.get_indent_info) == "function" then + -- use the new `Doc:get_indent_info` function + indent_size = select(2, doc:get_indent_info()) + end + return indent_size +end + +local function tabs_to_spaces() + local doc = core.active_view.doc + local indent_size = get_indent_size(doc) + local selections = doc.selections + doc:replace(replacer(doc, tabs_replacer, indent_size)) + doc.selections = selections + doc:sanitize_selection() + if config.plugins.indent_convert.update_indent_type then + doc.indent_info = { + type = "soft", + size = indent_size, + confirmed = true + } + end +end + +local function spaces_to_tabs() + local doc = core.active_view.doc + local indent_size = get_indent_size(doc) + local selections = doc.selections + doc:replace(replacer(doc, spaces_replacer, indent_size)) + doc.selections = selections + doc:sanitize_selection() + if config.plugins.indent_convert.update_indent_type then + doc.indent_info = { + type = "hard", + size = indent_size, + confirmed = true + } + end +end + +command.add("core.docview", { + ["indent-convert:tabs-to-spaces"] = tabs_to_spaces, + ["indent-convert:spaces-to-tabs"] = spaces_to_tabs + } +) |