From 0ae27c601aa3dbf72fda3048061bed8ba89f1607 Mon Sep 17 00:00:00 2001
From: rxi <rxi@users.noreply.github.com>
Date: Wed, 29 Apr 2020 08:57:36 +0100
Subject: Added `drawwhitespace` plugin

---
 README.md                  |  1 +
 plugins/drawwhitespace.lua | 29 +++++++++++++++++++++++++++++
 2 files changed, 30 insertions(+)
 create mode 100644 plugins/drawwhitespace.lua

diff --git a/README.md b/README.md
index 5af991d..7ab9872 100644
--- a/README.md
+++ b/README.md
@@ -12,6 +12,7 @@ Plugin | Description
 -------|-----------------------------------------
 [`autowrap`](plugins/autowrap.lua?raw=1) | Automatically hardwraps lines when typing
 [`bracketmatch`](plugins/bracketmatch.lua?raw=1) | [Underlines](https://user-images.githubusercontent.com/3920290/80132745-0c863f00-8594-11ea-8875-c455c6fd7eae.png) matching right-bracket of left-bracket under caret
+[`drawwhitespace`](plugins/drawwhitespace.lua?raw=1) | [Draws](https://user-images.githubusercontent.com/3920290/80573013-22ae5800-89f7-11ea-9895-6362a1c0abc7.png) tabs and spaces
 [`eval`](plugins/eval.lua?raw=1) | Replaces selected Lua code with its evaluated result
 [`gofmt`](plugins/gofmt.lua?raw=1) | Auto-formats the current go file, adds the missing imports and the missing return cases
 [`indentguide`](plugins/indentguide.lua?raw=1) | Adds [indent guides](https://user-images.githubusercontent.com/3920290/79640716-f9860000-818a-11ea-9c3b-26d10dd0e0c0.png)
diff --git a/plugins/drawwhitespace.lua b/plugins/drawwhitespace.lua
new file mode 100644
index 0000000..b121833
--- /dev/null
+++ b/plugins/drawwhitespace.lua
@@ -0,0 +1,29 @@
+local config = require "core.config"
+local style = require "core.style"
+local DocView = require "core.docview"
+
+-- originally written by luveti
+
+config.whitespace_map = { [" "] = "·", ["\t"] = "»" }
+
+local draw_line_text = DocView.draw_line_text
+
+function DocView:draw_line_text(idx, x, y)
+  draw_line_text(self, idx, x, y)
+
+  local cl = self:get_cached_line(idx)
+  local tx, ty = x, y + self:get_line_text_y_offset()
+  local font = self:get_font()
+  local color = style.whitespace or style.syntax.comment
+  local map = config.whitespace_map
+
+  for i = 1, #cl.text do
+    local chr = cl.text:sub(i, i)
+    local rep = map[chr]
+    if rep then
+      renderer.draw_text(font, rep, tx, ty, color)
+    end
+    tx = tx + font:get_width(chr)
+  end
+end
+
-- 
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