From fdb089daf6d66e9d559645e664a172ff5b6a5ddd Mon Sep 17 00:00:00 2001
From: Rene Schallner <rene@renerocks.ai>
Date: Fri, 19 Aug 2022 16:17:24 +0200
Subject: [PATCH] added `viu` img previewer support

---
 README.md             | 13 ++++++++++++-
 doc/telekasten.txt    |  3 +++
 lua/telekasten.lua    |  7 +++++++
 scripts/viu-previewer |  5 +++++
 4 files changed, 27 insertions(+), 1 deletion(-)
 create mode 100755 scripts/viu-previewer

diff --git a/README.md b/README.md
index a55fadc..e0ad586 100644
--- a/README.md
+++ b/README.md
@@ -27,7 +27,7 @@ mixing it with a journal, based on [telescope.nvim](https://github.com/nvim-tele
 - paste images from clipboard
 - toggle [ ] todo status of line
 - insert links to images
-- **image previews**, via `catimg` or extension _(Linux only)_
+- **image previews**, via `catimg`, `viu`, or extension
 
 <div align="center">
 
@@ -119,6 +119,7 @@ of being able to edit it.
     - [0.0.3 For pasting images: xclip (optional)](#003-for-pasting-images-xclip-optional)
     - [0.0.4 For image previews: telescope-media-files.nvim (optional)](#004-for-image-previews-telescope-media-filesnvim-optional)
       - [catimg](#catimg)
+      - [viu](#viu)
       - [telescope-media-files.nvim](#telescope-media-filesnvim)
   - [0.1 Install the plugin](#01-install-the-plugin)
     - [0.1.0 Other useful plugins](#010-other-useful-plugins)
@@ -186,12 +187,22 @@ There are two supported ways to preview images:
   - **ONLY supported on Linux**
 - via [catimg](https://github.com/posva/catimg)
   - supported at least on Linux and macOS
+- via [viu](https://github.com/atanunq/viu)
+  - supports both iTerm and Kitty graphics protocols.
+  - Note: on my Linux machine, Kitty graphics rendering inside neovim /
+    telescope does not work at all, so it falls back to block rendering
+    mode.
 
 ##### catimg
 
 Just install [catimg](https://github.com/posva/catimg), then set
 `media_previewer` to `"catimg-previewer"` in the config.
 
+##### viu
+
+Just install [viu](https://github.com/atanunq/viu), then set
+`media_previewer` to `"viu-previewer"` in the config.
+
 ##### telescope-media-files.nvim
 
 Per default, or by setting `media_previewer` to `"telescope-media-files"` in the
diff --git a/doc/telekasten.txt b/doc/telekasten.txt
index b19082f..0b42a90 100644
--- a/doc/telekasten.txt
+++ b/doc/telekasten.txt
@@ -154,6 +154,7 @@ telekasten.setup({opts})
       -- how to preview media files
       -- "telescope-media-files" if you have telescope-media-files.nvim installed
       -- "catimg-previewer" if you have catimg installed
+      -- "viu-previewer" if you have viu installed
       media_previewer = "telescope-media-files",
     }
 <
@@ -412,6 +413,8 @@ telekasten.setup({opts})
           plugin
         - `'catimg-previewer'` : use the built-in `catimg` previewer.
           Requires `catimg` to be installed.
+        - `'viu-previewer'` : use the built-in `viu` previewer.
+          Requires `viu` to be installed.
 
         Default: `telescope-media-files`
 
diff --git a/lua/telekasten.lua b/lua/telekasten.lua
index fd9e48f..c771583 100644
--- a/lua/telekasten.lua
+++ b/lua/telekasten.lua
@@ -153,6 +153,7 @@ local function defaultConfig(home)
         -- how to preview media files
         -- "telescope-media-files" if you have telescope-media-files.nvim installed
         -- "catimg-previewer" if you have catimg installed
+        -- "viu-previewer" if you have viu installed
         media_previewer = "telescope-media-files",
     }
     M.Cfg = cfg
@@ -979,6 +980,12 @@ local media_preview = defaulter(function(opts)
             .. "/telekasten.nvim/scripts/catimg-previewer"
     end
 
+    if vim.startswith(M.Cfg.media_previewer, "viu-previewer") then
+        preview_cmd = M.base_directory
+            .. "/telekasten.nvim/scripts/"
+            .. M.Cfg.media_previewer
+    end
+
     if vim.fn.executable(preview_cmd) == 0 then
         print("Previewer not found: " .. preview_cmd)
         return conf.file_previewer(opts)
diff --git a/scripts/viu-previewer b/scripts/viu-previewer
new file mode 100755
index 0000000..7d94bdd
--- /dev/null
+++ b/scripts/viu-previewer
@@ -0,0 +1,5 @@
+#!/usr/bin/env bash
+
+img="$1"
+
+viu "$img"