refactor: move Buffer:set_line_highlights() ANSI highlights to Buffer:set_ansi_highlights(), to avoid finding hunk line numbers manually with the hard-coded NeogitDiffContext

- Add `ansi_hl` to `ComponentOptions`, to indicate whether the component needs ANSI highlighting.
- Add `ansi_highlight` to `RendererBuffer`, to pass hunk line numbers.

Author: stevenxxiu

lua/neogit/buffers/common.lua

@@ -83,7 +83,13 @@ M.Hunk = Component.new(function(props)
   return col.tag("Hunk")({
     text.line_hl("NeogitHunkHeader")(props.header),
     col.tag("HunkContent")(map(props.content, HunkLine)),
-  }, { foldable = true, folded = props.folded or false, context = true, hunk = props.hunk })
+  }, {
+    ansi_hl = config.values.log_pager ~= nil,
+    foldable = true,
+    folded = props.folded or false,
+    context = true,
+    hunk = props.hunk,
+  })
 end)
 
 M.List = Component.new(function(props)

lua/neogit/lib/buffer.lua

@@ -146,38 +146,16 @@ function Buffer:set_extmarks(extmarks)
 end
 
 function Buffer:set_line_highlights(highlights)
-  local line_ansi_colorized_map = {}
-
   for _, hl in ipairs(highlights) do
-    local line_nr, hl_group = unpack(hl)
-    if hl_group == "NeogitDiffContext" then
-      line_ansi_colorized_map[line_nr] = true
-    else
-      self:add_line_highlight(unpack(hl))
-    end
-  end
-
-  local line_ansi_colorized = {}
-  for k in pairs(line_ansi_colorized_map) do
-    table.insert(line_ansi_colorized, k)
+    self:add_line_highlight(unpack(hl))
   end
-  table.sort(line_ansi_colorized)
+end
 
-  local start_line_nr, prev_line_nr
-  for _, line_nr in ipairs(line_ansi_colorized) do
-    if start_line_nr == nil then
-      start_line_nr = line_nr
-    end
-    if prev_line_nr ~= nil and line_nr ~= prev_line_nr + 1 then
-      local text = self:get_lines(start_line_nr, prev_line_nr + 1, false)
-      vim.g.baleia.buf_set_lines(self.handle, start_line_nr, prev_line_nr + 1, false, text)
-      start_line_nr = line_nr
-    end
-    prev_line_nr = line_nr
-  end
-  if start_line_nr ~= nil then
-    local text = self:get_lines(start_line_nr, prev_line_nr + 1, false)
-    vim.g.baleia.buf_set_lines(self.handle, start_line_nr, prev_line_nr + 1, false, text)
+function Buffer:set_ansi_highlights(highlights)
+  for _, hl in ipairs(highlights) do
+    local first_line, last_line = unpack(hl)
+    local text = self:get_lines(first_line, last_line, false)
+    vim.g.baleia.buf_set_lines(self.handle, first_line, last_line, false, text)
   end
 end
 

lua/neogit/lib/ui/component.lua

@@ -13,6 +13,7 @@ local default_component_options = {
 
 ---@class ComponentOptions
 ---@field line_hl string
+---@field ansi_hl boolean
 ---@field highlight string
 ---@field align_right integer|nil
 ---@field padding_left integer

lua/neogit/lib/ui/init.lua

@@ -679,6 +679,7 @@ function Ui:update()
     self.buf:set_highlights(renderer.buffer.highlight)
     self.buf:set_extmarks(renderer.buffer.extmark)
     self.buf:set_line_highlights(renderer.buffer.line_highlight)
+    self.buf:set_ansi_highlights(renderer.buffer.ansi_highlight)
     self.buf:set_folds(renderer.buffer.fold)
 
     self.statuscolumn = {}

lua/neogit/lib/ui/renderer.lua

@@ -65,6 +65,7 @@ end
 ---@field line string[]
 ---@field highlight table[]
 ---@field line_highlight table[]
+---@field ansi_highlight table[]
 ---@field extmark table[]
 ---@field fold table[]
 
@@ -93,6 +94,7 @@ function Renderer:new(layout, buffer)
       line = {},
       highlight = {},
       line_highlight = {},
+      ansi_highlight = {},
       extmark = {},
       fold = {},
     },
@@ -194,6 +196,13 @@ function Renderer:_render_child(child)
     table.insert(self.buffer.line_highlight, { #self.buffer.line - 1, line_hl })
   end
 
+  if child.options.ansi_hl then
+    table.insert(self.buffer.ansi_highlight, {
+      #self.buffer.line - (child.position.row_end - child.position.row_start),
+      #self.buffer.line,
+    })
+  end
+
   if child.options.virtual_text then
     table.insert(self.buffer.extmark, {
       self.namespace,