unicode_viewer/init.lua at main · testersakage/unicode_viewer · GitHub

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-- mods/unicode_viewer/init.lua
local player_pages = {}

-- formspec画面を描画・表示する関数
local function show_unicode_formspec(player_name)
	local start_code = player_pages[player_name] or 0

	-- 表示被りを防ぐため、上位バイトの16進数2桁のみを抽出 (例: 0x3000 なら "30")
	local page_hex = string.format("%02X", math.floor(start_code / 256))

	-- 【重要】formspec_version[4] を文字列の先頭で結合
	local formspec = "formspec_version[4]" ..
					 "size[10,11]" ..
					 "real_coordinates[true]" ..
					 "bgcolor[#00000000;true]"

	-- 窓のサイズ 8.5x8.5（X:0.5〜9.0, Y:0.5〜9.0）の中に綺麗に収まるよう配置を厳密に計算
	-- 1セルの幅・高さ = 0.45, 隙間 = 0.05
	-- 計算: 0.45 * 16 + 0.05 * 15 = 7.2 + 0.75 = 7.95 (8.5 の内側に余裕を持って確実に収まります)
	local cell_w = 0.45
	local cell_h = 0.45
	local spacing = 0.05
	local start_x = 0.5
	local start_y = 0.5

	for row = 0, 15 do
		for col = 0, 15 do
			local code = start_code + (row * 16) + col

			-- UnicodeコードポイントをUTF-8文字列に変換
			local success, char = pcall(utf8.char, code)

			-- 有効な文字に変換できなかった場合や制御文字の対策
			if not success or code < 32 or (code >= 127 and code <= 159) then
				char = "."
			else
				-- ボタンのテキスト部分でformspec構文を破壊しないよう、最低限のエスケープ処理
				if char == "[" then char = "("
				elseif char == "]" then char = ")"
				elseif char == ";" then char = ":"
				end
			end

			-- ボタン名を「uni_16進数」にする (例: "uni_3042")
			local hex_str = string.format("%04X", code)
			local btn_name = "uni_" .. hex_str

			-- 各マスの正確なX, Y座標を計算
			local x = start_x + (col * (cell_w + spacing))
			local y = start_y + (row * (cell_h + spacing))

			-- 【修正】formspec_version[4] 以降で安全にパースされる標準的な引数フォーマット
			formspec = formspec .. string.format("button[%f,%f;%f,%f;%s;%s]",
				x, y, cell_w, cell_h, btn_name, char)
		end
	end

	-- 2. パネル背景 (下部コントロールエリア用)
	local panel_bg = "#222222FF"
	formspec = formspec .. string.format("box[0,9.0;10,2.0;%s]", panel_bg)

	-- 3. UIパーツ (1行目: ページインジケータとナビゲーションボタン)
	formspec = formspec .. string.format("label[0.4,9.6;Page: %s]", page_hex)
	formspec = formspec .. "button[2.0,9.3;0.8,0.6;btn_prev16;-16]"
	formspec = formspec .. "button[2.9,9.3;0.8,0.6;btn_prev1;-1]"
	formspec = formspec .. "button[3.8,9.3;0.8,0.6;btn_reset;0]"
	formspec = formspec .. "button[4.7,9.3;0.8,0.6;btn_next1;+1]"
	formspec = formspec .. "button[5.6,9.3;0.8,0.6;btn_next16;+16]"

	-- 4. 2行目: 16進数ジャンプ
	formspec = formspec .. "label[0.5,10.4;Hex Jump:]"
	formspec = formspec .. "field[2.0,10.1;2.0,0.6;jump_code;;]"
	formspec = formspec .. "button[4.1,10.1;1.2,0.6;btn_jump;Jump]"

	-- 5. 閉じるボタン
	formspec = formspec .. "button_exit[7.5,10.1;2.0,0.6;quit;Close]"

	minetest.show_formspec(player_name, "unicode_viewer:viewer", formspec)
end

-- 3. イベント処理
minetest.register_on_player_receive_fields(function(player, formname, fields)
	if formname ~= "unicode_viewer:viewer" then return false end

	if fields.quit == "true" then
		return true
	end

	local player_name = player:get_player_name()
	local current_code = player_pages[player_name] or 0
	local refresh = false

	-- 敷き詰めた 256 個のボタンのいずれかがクリックされたかの判定
	for k, v in pairs(fields) do
		if string.sub(k, 1, 4) == "uni_" then
			local hex_code = string.sub(k, 5) -- "uni_3042" から "3042" を切り出す
			local num_code = tonumber(hex_code, 16)
			local char = utf8.char(num_code)

			-- チャット欄に結果を通知
			minetest.chat_send_player(player_name, string.format("Selected Character: %s (U+%s)", char, hex_code))
			break
		end
	end

	-- ページ操作ロジック（1ページ=256文字、16ページ=4096文字として計算）
	if fields.btn_next16 then
		player_pages[player_name] = math.min(0xFF00, current_code + 4096)
		refresh = true
	elseif fields.btn_next1 then
		player_pages[player_name] = math.min(0xFF00, current_code + 256)
		refresh = true
	elseif fields.btn_prev16 then
		player_pages[player_name] = math.max(0, current_code - 4096)
		refresh = true
	elseif fields.btn_prev1 then
		player_pages[player_name] = math.max(0, current_code - 256)
		refresh = true
	elseif fields.btn_reset then
		player_pages[player_name] = 0
		refresh = true

	-- 「Jump」ボタンまたはEnterキーでのジャンプ
	elseif fields.btn_jump or (fields.key_enter == "true" and fields.key_enter_field == "jump_code") then
		local input = fields.jump_code or ""
		local num = tonumber(input, 16)

		if num then
			if num > 0xFFFF then num = 0xFFFF
			elseif num < 0 then num = 0
			end
			player_pages[player_name] = math.floor(num / 256) * 256
			refresh = true
		else
			minetest.chat_send_player(player_name, "Error: Invalid hex number. (e.g. 0000, 3000, FFFF)")
		end
	end

	if refresh and fields.quit ~= "true" then
		show_unicode_formspec(player_name)
		return true
	end
end)

-- 4. チャットコマンドで起動
minetest.register_chatcommand("uview", {
	params = "",
	description = "Open Unicode Viewer",
	func = function(name, param)
		player_pages[name] = 0
		show_unicode_formspec(name)
		return true
	end,
})

-- 5. アイテム登録
minetest.register_craftitem("unicode_viewer:viewer", {
	description = "Unicode Viewer",
	inventory_image = "unicode_view.png",
	stack_max = 1,
	on_use = function(itemstack, user)
		if user then show_unicode_formspec(user:get_player_name()) end
		return itemstack
	end,
})