refactor: begin to refactor buffer node and buffer obj

lua/Trans/util/bing_node.lua

@@ -0,0 +1,166 @@
+--- INFO : Generated by newbing
+
+-- 基类node
+local Node = {}
+Node.__index = Node
+
+-- 构造函数
+function Node:new(row, col, width, height)
+    local obj = {
+        row = row,
+        col = col,
+        width = width,
+        height = height,
+    }
+    setmetatable(obj, self)
+    return obj
+end
+
+-- 渲染方法（空实现）
+function Node:render()
+end
+
+-- 更新方法（空实现）
+function Node:update()
+end
+
+-- 子类box node
+local BoxNode = setmetatable({}, Node)
+BoxNode.__index = BoxNode
+
+-- 构造函数
+function BoxNode:new(row, col, width, height, border_style)
+    local obj = Node.new(self, row, col, width, height)
+    obj.border_style = border_style or "single"
+    return obj
+end
+
+-- 渲染方法（画边框）
+function BoxNode:render()
+    local top_left_char =
+        self.border_style == "single" and "┌" or self.border_style == "double" and "╔"
+    local top_right_char =
+        self.border_style == "single" and "┐" or self.border_style == "double" and "╗"
+    local bottom_left_char =
+        self.border_style == "single" and "└" or self.border_style == "double" and "╚"
+    local bottom_right_char =
+        self.border_style == "single" and "┘" or self.border_style == "double" and "╝"
+    local horizontal_char =
+        self.border_style == "single" and "-" or self.border_style == "double" and "="
+    local vertical_char =
+        self.border_style == "single" and "|" or self.border_style == "double" and "|"
+
+    -- draw top line
+    vim.api.nvim_buf_set_text(
+        vim.api.nvim_get_current_buf(),
+        self.row,
+        self.col,
+        self.row,
+        math.min(self.col + self.width - 1),
+        { top_left_char .. horizontal_char:rep(self.width - 2) .. top_right_char }
+    )
+
+    -- draw bottom line
+    vim.api.nvim_buf_set_text(
+        vim.api.nvim_get_current_buf(),
+        math.min(self.row + self.height - 1),
+        math.max(self.col),
+        math.min(self.row + self.height - 1),
+        math.min(self.col + self.width - 1),
+        { bottom_left_char .. horizontal_char:rep(self.width - 2) .. bottom_right_char }
+    )
+
+    -- draw left line
+    for i = self.row + 1, self.row + self.height - 2 do
+        vim.api.nvim_buf_set_text(
+            vim.api.nvim_get_current_buf(),
+            i,
+            math.max(self.col),
+            i,
+            math.max(self.col + 1),
+            { vertical_char }
+        )
+    end
+
+    -- draw right line
+    for i = self.row + 1, self.row + self.height - 2 do
+        vim.api.nvim_buf_set_text(
+            vim.api.nvim_get_current_buf(),
+            i,
+            math.min(self.col + self.width - 1),
+            i,
+            math.min(self.col + self.width),
+            { vertical_char }
+        )
+    end
+end
+
+-- 更新方法（暂无）
+
+-- 子类text node
+local TextNode = setmetatable({}, Node)
+TextNode.__index = TextNode
+
+-- 构造函数
+function TextNode:new(row, col, width, height, text_content)
+    local obj = Node.new(self, row, col, width, height)
+    obj.text_content = text_content or ""
+    return obj
+end
+
+-- 渲染方法（写入文本内容）
+function TextNode:render()
+    -- split text content by newline character
+    local lines = vim.split(obj.text_content, "\n")
+
+    -- write each line to buffer text within the node boundaries
+    for i, line in ipairs(lines) do
+        if i <= self.height then
+            vim.api.nvim_buf_set_text(
+                vim.api.nvim_get_current_buf(),
+                math.min(self.row + i - 1), math.max(self.col),
+                math.min(self.row + i - 1),
+                math.min(self.col + self.width - 1),
+                { line:sub(1, self.width) }
+            )
+        end
+    end
+end
+
+-- 更新方法（暂无）
+
+-- 子类extmark node
+local ExtmarkNode = setmetatable({}, Node)
+ExtmarkNode.__index = ExtmarkNode
+
+-- 构造函数
+function ExtmarkNode:new(row, col, width, height, hl_group)
+    local obj = Node.new(self, row, col, width, height)
+    obj.hl_group = hl_group or "Normal"
+    return obj
+end
+
+-- 渲染方法（创建一个extmark）
+function ExtmarkNode:render()
+    -- create a namespace for extmarks
+    local ns = vim.api.nvim_create_namespace("nodes")
+
+    -- create an extmark with the given highlight group and position
+    vim.api.nvim_buf_set_extmark(
+        vim.api.nvim_get_current_buf(),
+        ns,
+        self.row,
+        self.col,
+        { hl_group = self.hl_group, end_line = self.row + self.height - 1, end_col = self.col + self.width - 1 }
+    )
+end
+
+-- 更新方法（暂无）
+
+-- 返回所有的节点类
+return {
+    Node = Node,
+    BoxNode = BoxNode,
+    TextNode = TextNode,
+    ExtmarkNode = ExtmarkNode,
+}

lua/Trans/util/node.lua

@@ -1,24 +1,23 @@
 local api = vim.api
-local ns = require('Trans').ns
 local add_hl = api.nvim_buf_add_highlight
 
 local item_meta = {
-    load = function(self, bufnr, line, col)
+    render = function(self, bufnr, line, col)
         if self[2] then
-            add_hl(bufnr, ns, self[2], line, col, col + #self[1])
+            add_hl(bufnr, self.ns or -1, self[2], line, col, col + #self[1])
         end
     end,
 }
 
 local text_meta = {
-    load = function(self, bufnr, line, col)
+    render = function(self, bufnr, line, col)
         local items = self.items
         local step = self.step or ''
         local len = #step
 
         for i = 1, self.size do
             local item = items[i]
-            item:load(bufnr, line, col)
+            item:render(bufnr, line, col)
             col = col + #item[1] + len
         end
     end
@@ -41,7 +40,6 @@ return {
             [2] = highlight,
         }, item_meta)
     end,
-
     text = function(items)
         local strs = {}
         local size = #items
@@ -56,7 +54,6 @@ return {
             items = items,
         }, text_meta)
     end,
-
     format = function(opts)
         local text  = opts.text
         local size  = text.size