refactor(nvim): change header logo for dashboard (alpha)

users/price/dots/.config/nvim/lua/plugins/configs/alpha.lua

@@ -16,36 +16,92 @@ return {
         end,
         lazy = true,
         opts = function()
-            -- Set header
+            -- helper function for utf8 chars
+            local function getCharLen(s, pos)
+                local byte = string.byte(s, pos)
+                if not byte then
+                    return nil
+                end
+                return (byte < 0x80 and 1) or (byte < 0xE0 and 2) or (byte < 0xF0 and 3) or (byte < 0xF8 and 4) or 1
+            end
+
+            local function applyColors(logo, colors, logoColors)
                 local header = {
-                type = "text",
+                    val = logo,
-                val = {
+                    opts = {
-                    "                               ",
+                        hl = {},
-                    "                               ",
-                    "         -╲         '-         ",
-                    "       -' :╲        │ '-       ",
-                    "     -'   : ╲       │   '-     ",
-                    "   -'·    :  ╲      │     '-   ",
-                    "  '.-.·   :   ╲     │       │  ",
-                    "  │. .-·  :    ╲    │       │  ",
-                    "  │ . .-· :     ╲   │       │  ",
-                    "  │. . .-·;      ╲  │       │  ",
-                    "  │ . . .-│       ╲ │       │  ",
-                    "  │. . . .│╲       ╲│       │  ",
-                    "  │ . . . │ ╲       ;-      │  ",
-                    "  │. . . .│  ╲      :·-     │  ",
-                    "  │ . . . │   ╲     : .-    │  ",
-                    "  │. . . .│    ╲    :. .-   │  ",
-                    "  `- . . .│     ╲   : . .- -'  ",
-                    "    `- . .│      ╲  :. ..-'    ",
-                    "      `-. │       ╲ :..-'      ",
-                    "         `│        ╲;-'        ",
-                    "                               ",
-                    "                               ",
                     },
-                opts = { position = "center", hl = "@boolean" },
                 }
 
+                for key, color in pairs(colors) do
+                    local name = "Alpha" .. key
+                    vim.api.nvim_set_hl(0, name, color)
+                    colors[key] = name
+                end
+
+                for i, line in ipairs(logoColors) do
+                    local highlights = {}
+                    local pos = 0
+
+                    for j = 1, #line do
+                        local opos = pos
+                        pos = pos + getCharLen(logo[i], opos + 1)
+
+                        local color_name = colors[line:sub(j, j)]
+                        if color_name then
+                            table.insert(highlights, { color_name, opos, pos })
+                        end
+                    end
+
+                    table.insert(header.opts.hl, highlights)
+                end
+                return header
+            end
+            -- Thanks to https://github.com/goolord/alpha-nvim/discussions/16#discussioncomment-10062303
+            local header = applyColors({
+                [[  ███       ███  ]],
+                [[  ████      ████ ]],
+                [[  ████     █████ ]],
+                [[ █ ████    █████ ]],
+                [[ ██ ████   █████ ]],
+                [[ ███ ████  █████ ]],
+                [[ ████ ████ ████ ]],
+                [[ █████  ████████ ]],
+                [[ █████   ███████ ]],
+                [[ █████    ██████ ]],
+                [[ █████     █████ ]],
+                [[ ████      ████ ]],
+                [[  ███       ███  ]],
+                [[                    ]],
+                [[  N  E  O  V  I  M  ]],
+            }, {
+                ["b"] = { fg = "#3399ff", ctermfg = 33 },
+                ["a"] = { fg = "#53C670", ctermfg = 35 },
+                ["g"] = { fg = "#39ac56", ctermfg = 29 },
+                ["h"] = { fg = "#33994d", ctermfg = 23 },
+                ["i"] = { fg = "#33994d", bg = "#39ac56", ctermfg = 23, ctermbg = 29 },
+                ["j"] = { fg = "#53C670", bg = "#33994d", ctermfg = 35, ctermbg = 23 },
+                ["k"] = { fg = "#30A572", ctermfg = 36 },
+            }, {
+                [[  kkkka       gggg  ]],
+                [[  kkkkaa      ggggg ]],
+                [[ b kkkaaa     ggggg ]],
+                [[ bb kkaaaa    ggggg ]],
+                [[ bbb kaaaaa   ggggg ]],
+                [[ bbbb aaaaaa  ggggg ]],
+                [[ bbbbb aaaaaa igggg ]],
+                [[ bbbbb  aaaaaahiggg ]],
+                [[ bbbbb   aaaaajhigg ]],
+                [[ bbbbb    aaaaajhig ]],
+                [[ bbbbb     aaaaajhi ]],
+                [[ bbbbb      aaaaajh ]],
+                [[  bbbb       aaaaa  ]],
+                [[                    ]],
+                [[  a  a  a  b  b  b  ]],
+            })
+            header.type = "text"
+            header.opts.position = "center"
+
             local vim_version = {
                 type = "text",
                 val = function()
@@ -169,18 +225,19 @@ return {
             end
             local opts = {
                 layout = {
-                    padding(8),
+                    padding(10),
                     header,
+                    padding(1),
                     vim_version,
-                    padding(2),
+                    padding(1),
                     datetime,
                     padding(1),
                     plugin_info,
                     padding(1),
                     plugins_loaded,
-                    padding(2),
+                    padding(1),
                     buttons,
-                    padding(2),
+                    padding(1),
                     fortune,
                 },
                 opts = { margin = 5 },