From 54921225ff4340a503371066f273bcd79432dcdf Mon Sep 17 00:00:00 2001
From: Techie Guy <79499324+techie-guy@users.noreply.github.com>
Date: Sun, 22 Jan 2023 10:23:00 +0530
Subject: Add Nerdicons Plugin (#202)

* Add Nerdicons Plugin

* Update manifest.json

* Update manifest.json
---
 plugins/nerdicons.lua | 192 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 192 insertions(+)
 create mode 100644 plugins/nerdicons.lua

(limited to 'plugins')

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
-- 
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