♻ Refactor: Move telescope hologram to module

lua/setup/telescope/hologram.lua

@@ -0,0 +1,80 @@
+local previewers = require("telescope.previewers")
+local utils = require("utils.core")
+
+local M = {}
+
+local is_hologram_preview = false
+local support_filetype = { "png" } -- TODO: Support jpg, jpeg, webp, avif
+local hologram_image = nil
+local last_file_path = "" -- TODO: Cache file path to stop hologram reload image
+
+local cache_win_position = false
+local hologram_row = 0
+local hologram_col = 0
+local preview_win_position = 0
+local current_win_position = 0
+-- local preview_win_height = 0
+-- local preview_win_width = 0
+
+local is_support_filetype = function(filetype)
+    return vim.tbl_contains(support_filetype, filetype)
+end
+
+local delete_hologram = function()
+    hologram_image:delete({ free = true })
+    is_hologram_preview = false
+end
+
+local set_hologram_row_col = function(opts)
+    if not cache_win_position then
+        preview_win_position = vim.api.nvim_win_get_position(opts.winid)
+        current_win_position = vim.api.nvim_win_get_position(0)
+        -- preview_win_height = vim.api.nvim_win_get_height(opts.winid)
+        -- preview_win_width = vim.api.nvim_win_get_width(opts.winid)
+
+        cache_win_position = true
+    end
+
+    local cursor_win_position = vim.api.nvim_win_get_cursor(0)
+    hologram_row = preview_win_position[1] - current_win_position[1] - cursor_win_position[1] + 1
+    hologram_col = preview_win_position[2] - current_win_position[2] - cursor_win_position[2] + 2
+end
+
+local create_hologram = function(filepath)
+    hologram_image = require("hologram.image"):new({
+        buf = 0,
+        source = filepath,
+        row = hologram_row,
+        col = hologram_col,
+    })
+    hologram_image:transmit()
+
+    is_hologram_preview = true
+end
+
+-- NOTE: Use Hologram to show image
+M.buffer_previewer_maker = function(filepath, bufnr, opts)
+    -- NOTE: Clear image when preview other file
+    if is_hologram_preview and last_file_path ~= filepath then
+        delete_hologram()
+    end
+
+    last_file_path = filepath
+
+    local filetype = utils.file_extension(filepath)
+    if is_support_filetype(filetype) then
+        set_hologram_row_col(opts)
+
+        create_hologram(filepath)
+    else
+        previewers.buffer_previewer_maker(filepath, bufnr, opts)
+    end
+end
+
+M.teardown = function(_)
+    if is_hologram_preview then
+        delete_hologram()
+    end
+end
+
+return M

lua/setup/telescope/init.lua

@@ -1,66 +1,9 @@
 local telescope = require("telescope")
-local previewers = require("telescope.previewers")
 local actions = require("telescope.actions")
-local utils = require("utils.core")
 local buffer_previewer = require("setup.telescope.buffer_previewer")
+local hologram = require("setup.telescope.hologram")
 
-local is_hologram_preview = false
-local support_filetype = { "png" } -- TODO: Support jpg, jpeg, webp, avif
-local hologram_image
-
-local is_support_filetype = function(filetype)
-    return vim.tbl_contains(support_filetype, filetype)
-end
-
--- NOTE: Use Hologram to show image
-local buffer_previewer_maker = function(filepath, bufnr, opts)
-    -- NOTE: Clear image when preview other file
-    if is_hologram_preview then
-        hologram_image:delete({ free = true })
-        is_hologram_preview = false
-    end
-
-    local filetype = utils.file_extension(filepath)
-    if is_support_filetype(filetype) then
-        local preview_win_position = vim.api.nvim_win_get_position(opts.winid)
-        local current_win_position = vim.api.nvim_win_get_position(0)
-        local cursor_win_position = vim.api.nvim_win_get_cursor(0)
-        local preview_win_height = vim.api.nvim_win_get_height(opts.winid)
-        local preview_win_width = vim.api.nvim_win_get_width(opts.winid)
-
-        -- if filetype == "jpg" or filetype == "jpeg" or filetype == "webp" or filetype == "avif" then
-        --     local filename = "/tmp/" .. require("utils.md5").sumhexa(filepath) .. ".png"
-
-        --     vim.loop.spawn("convert", {
-        --         args = { filepath, filename },
-        --     }, function()
-        --         -- print(filename)
-        --     end)
-
-        --     filepath = filename
-        -- end
-
-        hologram_image = require("hologram.image"):new({
-            buf = 0,
-            source = filepath,
-            row = preview_win_position[1] - current_win_position[1] - cursor_win_position[1] + 1,
-            col = preview_win_position[2] - current_win_position[2] - cursor_win_position[2] + 2,
-        })
-
-        hologram_image:transmit({ column = preview_win_width, row = preview_win_height })
-
-        is_hologram_preview = true
-    else
-        previewers.buffer_previewer_maker(filepath, bufnr, opts)
-    end
-end
-
-buffer_previewer.teardown = function(_)
-    if is_hologram_preview then
-        hologram_image:delete({ free = true })
-        is_hologram_preview = false
-    end
-end
+buffer_previewer.teardown = hologram.teardown
 
 telescope.setup({
     defaults = {
@@ -70,7 +13,7 @@ telescope.setup({
             horizontal = { mirror = false, preview_width = 0.5 },
         },
 
-        buffer_previewer_maker = buffer_previewer_maker,
+        buffer_previewer_maker = hologram.buffer_previewer_maker,
 
         mappings = {
             i = {