Add Nerdicons Plugin (#202)

* Add Nerdicons Plugin

* Update manifest.json

* Update manifest.json

2 files changed, 200 insertions, 0 deletions

diff --git a/manifest.json b/manifest.json
index fff61d3..804b8c8 100644
--- a/manifest.json
+++ b/manifest.json
@@ -967,6 +967,14 @@
       "id": "net"
     },
     {
+      "description": "File icons set for TreeView. Download font from nerdfonts.com. Modification of the [nonicons](plugins/nonicons.lua) plugin"
+      "version": "1.0",
+      "type": "plugin",
+      "path": "plugins/nerdicons.lua",
+      "id": "nerdicons",
+      "mod_version": "3"
+    },
+    {
       "description": "File icons set for TreeView. Download [font](https://github.com/yamatsum/nonicons/raw/6a2faf4fbdfbe353c5ae6a496740ac4bfb6d0e74/dist/nonicons.ttf) to your config/fonts folder",
       "version": "0.1",
       "path": "plugins/nonicons.lua",
diff --git a/plugins/nerdicons.lua b/plugins/nerdicons.lua
new file mode 100644
index 0000000..5e01442
--- /dev/null
+++ b/plugins/nerdicons.lua
@@ -0,0 +1,192 @@
+-- mod-version:3

+-- Orginal Author: Jipok

+-- Modified by: techie-guy

+-- Doesn't work well with scaling mode == "ui"

+

+-- This is an extension/modification of the nonicons plugin, https://github.com/lite-xl/lite-xl-plugins/blob/master/plugins/nonicons.lua

+

+-- Any icon can be searched by it's hex from nerdfonts.com/cheat-sheet

+

+-- How to use:

+-- 1. Download a nerd font that you like from nerdfonts.com

+-- 2. Unzip the zip file that you downloaded.

+-- 3. Choose a font file from the unzipped directory and install it.

+-- 4. Copy the font file to the .config/lite-xl/fonts and rename it to "icon-nerd-font.ttf".

+-- 5. Restart lite-xl, the icons should appear.

+

+local core = require "core"

+local common = require "core.common"

+local config = require "core.config"

+local style = require "core.style"

+local TreeView = require "plugins.treeview"

+local Node = require "core.node"

+

+-- Config

+config.plugins.nerdicons = common.merge({

+  use_default_dir_icons = false,

+  use_default_chevrons = false,

+  draw_treeview_icons = true,

+  draw_tab_icons = true,

+  -- The config specification used by the settings gui

+  config_spec = {

+    name = "Nerdicons",

+    {

+      label = "Use Default Directory Icons",

+      description = "When enabled does not use nerdicon directory icons.",

+      path = "use_default_dir_icons",

+      type = "toggle",

+      default = false

+    },

+    {

+      label = "Use Default Chevrons",

+      description = "When enabled does not use nerdicon expand/collapse arrow icons.",

+      path = "use_default_chevrons",

+      type = "toggle",

+      default = false

+    },

+    {

+      label = "Draw Treeview Icons",

+      description = "Enables file related icons on the treeview.",

+      path = "draw_treeview_icons",

+      type = "toggle",

+      default = true

+    },

+    {

+      label = "Draw Tab Icons",

+      description = "Adds file related icons to tabs.",

+      path = "draw_tab_icons",

+      type = "toggle",

+      default = true

+    },

+  }

+}, config.plugins.nerdicons)

+

+local icon_font = renderer.font.load(USERDIR .. "/fonts/icon-nerd-font.ttf", 18.5 * SCALE)

+local chevron_width = icon_font:get_width("")

+local previous_scale = SCALE

+

+local extension_icons = {

+  [".lua"] = { "#405af0", ""},

+  [".md"]  = { "#519aba", "" }, -- Markdown

+  [".powershell"] = { "#519aba", "" },

+  [".bat"] = { "#cbcb41", "" },

+  [".txt"] = { "#ffffff", "" },

+  [".cpp"] = { "#519aba", "ﭱ" },

+  [".c"]   = { "#599eff", "" },

+  [".h"]   = { "#79029b", "h" },

+  [".hpp"] = { "#79029b", "h" },

+  [".py"]  = { "#3572A5", "" }, -- Python

+  [".pyc"]  = { "#519aba", "" },

+  [".pyd"]  = { "#519aba", "" },

+  [".php"] = { "#a074c4", "" },

+  [".cs"] = { "#596706", "" },  -- C#

+  [".conf"] = { "#6d8086", "" }, [".cfg"] = { "#6d8086", "" },

+  [".toml"] = { "#6d8086", "" },

+  [".yaml"] = { "#6d8086", "" }, [".yml"] = { "#6d8086", "" },

+  [".json"] = { "#854CC7", "" },

+  [".css"] = { "#519abc", "" },

+  [".html"] = { "#e34c26", "" },

+  [".js"] = { "#cbcb41", "" },  -- JavaScript

+  [".go"] = { "#519aba", "" },

+  [".jpg"] = { "#a074c4", "" }, [".png"] = { "#a074c4", "" },

+  [".sh"] = { "#4d5a5e", "" }, [".bash"] = { "#4d5a5e", "" },  -- Shell

+  [".java"] = { "#cc3e44", "" },

+  [".scala"] = { "#cc3e44", "" },

+  [".kt"] = { "#F88A02", "" },  -- Kotlin

+  [".pl"] = { "#519aba", "" },  -- Perl

+  [".rb"] = { "#701516", "" },  -- Ruby

+  [".rs"] = { "#c95625", "" },  -- Rust

+  [".rss"] = { "#cc3e44", "" },

+  [".sql"] = { "#dad8d8", "" },

+  [".swift"] = { "#e37933", "ﯣ" },

+  [".ts"] = { "#519aba", "ﯤ" },  -- TypeScript

+  [".diff"] = { "#41535b", "" },

+  [".exe"] = {"#cc3e55", ""},

+  [".make"] = { "#d0bf41", "" },

+  [".svg"] = { "#f7ca39", "ﰟ" },

+  [".ttf"] = {"#dad8d4", ""}, [".otf"] = {"#dad8d4", ""}

+}

+

+local known_filenames_icons = {

+  ["dockerfile"] = { "#296478", "" },

+  [".gitignore"] = { "#cc3e55", "" },

+  [".gitmodules"] = { "#cc3e56", "" },

+  ["PKGBUILD"] = { "#6d8ccc", "" },

+  ["license"] = { "#d0bf41", "" },

+  ["makefile"] = { "#d0bf41", "" },

+  ["cmakelists.txt"] = { "#cc3e55", "喝" },

+}

+

+-- Preparing colors

+for k, v in pairs(extension_icons) do

+  v[1] = { common.color(v[1]) }

+end

+for k, v in pairs(known_filenames_icons) do

+  v[1] = { common.color(v[1]) }

+end

+

+-- Override function to change default icons for dirs, special extensions and names

+local TreeView_get_item_icon = TreeView.get_item_icon

+function TreeView:get_item_icon(item, active, hovered)

+  local icon, font, color = TreeView_get_item_icon(self, item, active, hovered)

+  if previous_scale ~= SCALE then

+    icon_font:set_size(

+      icon_font:get_size() * (SCALE / previous_scale)

+    )

+    chevron_width = icon_font:get_width("")

+    previous_scale = SCALE

+  end

+  if not config.plugins.nerdicons.use_default_dir_icons then

+    icon = "" -- hex ea7b

+    font = icon_font

+    color = style.text

+    if item.type == "dir" then

+      icon = item.expanded and "ﱮ" or "" -- hex f07c and f07b

+    end

+  end

+  if config.plugins.nerdicons.draw_treeview_icons then

+    local custom_icon = known_filenames_icons[item.name:lower()]

+    if custom_icon == nil then

+      custom_icon = extension_icons[item.name:match("^.+(%..+)$")]

+    end

+    if custom_icon ~= nil then

+      color = custom_icon[1]

+      icon = custom_icon[2]

+      font = icon_font

+    end

+    if active or hovered then

+      color = style.accent

+    end

+  end

+  return icon, font, color

+end

+

+-- Override function to draw chevrons if setting is disabled

+local TreeView_draw_item_chevron = TreeView.draw_item_chevron

+function TreeView:draw_item_chevron(item, active, hovered, x, y, w, h)

+  if not config.plugins.nerdicons.use_default_chevrons then

+    if item.type == "dir" then

+      local chevron_icon = item.expanded and "" or ""

+      local chevron_color = hovered and style.accent or style.text

+      common.draw_text(icon_font, chevron_color, chevron_icon, nil, x+8, y, 0, h) -- added 8 to x to draw the chevron closer to the icon

+    end

+    return chevron_width + style.padding.x

+  end

+  return TreeView_draw_item_chevron(self, item, active, hovered, x, y, w, h)

+end

+

+-- Override function to draw icons in tabs titles if setting is enabled

+local Node_draw_tab_title = Node.draw_tab_title

+function Node:draw_tab_title(view, font, is_active, is_hovered, x, y, w, h)

+  if config.plugins.nerdicons.draw_tab_icons then

+    local padx = chevron_width + style.padding.x/2

+    local tx = x + padx/16 -- Space for icon

+    w = w + padx

+    Node_draw_tab_title(self, view, font, is_active, is_hovered, tx, y, w, h)

+    if (view == nil) or (view.doc == nil) then return end

+    local item = { type = "file", name = view.doc:get_name() }

+    TreeView:draw_item_icon(item, false, is_hovered, x, y, w, h)

+  else

+    Node_draw_tab_title(self, view, font, is_active, is_hovered, x, y, w, h)

+  end

+end