fix(#1482): adds the ability to set a prefix to winbar

Author: adriancmiranda

lua/lspsaga/highlight.lua

@@ -4,6 +4,7 @@ local kind = require('lspsaga.lspkind').kind
 local function hi_define()
   return {
     -- general
+    SagaPrefix = { link = 'Prefix' },
     SagaTitle = { link = 'Title' },
     SagaBorder = { link = 'FloatBorder' },
     SagaNormal = { link = 'NormalFloat' },

lua/lspsaga/symbol/winbar.lua

@@ -21,9 +21,15 @@ local function path_in_bar(buf)
 
   local bar = bar_prefix()
   local items = {}
+
+  local winbar_prefix = type(ui.winbar_prefix) == 'string'
+      and #ui.winbar_prefix > 0
+      and '%#Prefix#' .. ui.winbar_prefix
+    or ''
+
   local folder
   if ui.foldericon then
-    folder = ui.winbar_prefix .. get_kind_icon(302)[2]
+    folder = get_kind_icon(302)[2]
   end
 
   for item in util.path_itera(buf) do
@@ -34,7 +40,7 @@ local function path_in_bar(buf)
         and '%#' .. (hl or 'SagaFileIcon') .. '#' .. (icon and icon .. ' ' or '') .. '%*' .. bar.prefix .. 'FileName#' .. item
       or bar.prefix
         .. 'Folder#'
-        .. (folder and folder or ui.winbar_prefix)
+        .. (folder and folder or '')
         .. '%*'
         .. bar.prefix
         .. 'FolderName#'
@@ -47,7 +53,7 @@ local function path_in_bar(buf)
     end
   end
 
-  local barstr = ''
+  local barstr = winbar_prefix .. ''
   for i = #items, 1, -1 do
     barstr = barstr .. items[i] .. (i > 1 and bar.sep or '')
   end

test/helper.lua

@@ -57,10 +57,17 @@ local function lspconfig_dep()
   lspconfig.lua_ls.setup({})
 end
 
+local function extract_winbar_value(input, arg)
+  local pattern = '%%#' .. arg .. '#([^%%#]+)'
+  local winbar_value = string.match(input, pattern)
+  return winbar_value or ''
+end
+
 return {
   test_dir = test_dir,
   feedkey = feedkey,
   treesitter_dep = treesitter_dep,
   lspconfig_dep = lspconfig_dep,
   join_paths = join_paths,
+  extract_winbar_value = extract_winbar_value,
 }

test/winbar_spec.lua

@@ -0,0 +1,114 @@
+-- Define a table simulating LSP (Language Server Protocol) symbol responses
+local lsp_symbols = {
+  pending_request = false,
+  symbols = {
+    {
+      detail = '',
+      kind = 19,
+      name = 'command',
+      range = {
+        ['end'] = {
+          character = 18,
+          line = 0,
+        },
+        start = {
+          character = 6,
+          line = 0,
+        },
+      },
+      selectionRange = {
+        ['end'] = {
+          character = 13,
+          line = 0,
+        },
+        start = {
+          character = 6,
+          line = 0,
+        },
+      },
+    },
+  },
+}
+
+-- Function to get symbols, returns the simulated lsp_symbols table
+function lsp_symbols.get_symbols(_bufnr)
+  return lsp_symbols
+end
+
+-- Configuration for the lspsaga plugin
+local lspsaga_opts = {
+  ui = {
+    winbar_prefix = '  ',
+  },
+  symbol_in_winbar = {
+    enable = true,
+    separator = '|',
+  },
+}
+
+-- Require the lspsaga module and configure it with the defined options
+local lspsaga = require('lspsaga')
+lspsaga.setup(lspsaga_opts)
+
+describe('winbar', function()
+  local api = vim.api
+  local lspsaga_symbols__get_buf_symbols, lspsaga_head__get_buf_symbols
+  local lspsaga_symbol = require('lspsaga.symbol')
+  local lspsaga_head = require('lspsaga.symbol.head')
+  local lspsaga_winbar = require('lspsaga.symbol.winbar')
+  local helper = require('test.helper')
+
+  before_each(function()
+    -- Create a new buffer and set it as the current buffer
+    local buf = api.nvim_create_buf(false, true)
+    api.nvim_set_current_buf(buf)
+    api.nvim_command('vsplit')
+    api.nvim_set_current_win(api.nvim_get_current_win())
+
+    -- Store original functions
+    lspsaga_symbols__get_buf_symbols = lspsaga_symbol.get_buf_symbols
+    lspsaga_head__get_buf_symbols = lspsaga_symbol.get_buf_symbols
+
+    -- Replace real LSP interaction with the mock
+    lspsaga_symbol.get_buf_symbols = lsp_symbols.get_symbols
+    lspsaga_head.get_buf_symbols = lsp_symbols.get_symbols
+  end)
+
+  after_each(function()
+    -- Restore original functions after each test
+    lspsaga_symbol.get_buf_symbols = lspsaga_symbols__get_buf_symbols
+    lspsaga_head.get_buf_symbols = lspsaga_head__get_buf_symbols
+  end)
+
+  it('should correctly extract components from the winbar', function()
+    -- Initialize the winbar for the current buffer
+    lspsaga_winbar.init_winbar(api.nvim_get_current_buf())
+
+    -- Simulate a situation with many items in the winbar
+    -- (Adapt as necessary to create a long list of symbols)
+    local cur_win = api.nvim_get_current_win()
+    local max_width = math.floor(api.nvim_win_get_width(cur_win) * 0.9)
+    api.nvim_set_option_value('winbar', string.rep('Item|', max_width), {
+      scope = 'local',
+      win = api.nvim_get_current_win(),
+    })
+
+    -- Define a winbar value large enough to exceed the window width
+    local winbar_value = lspsaga_winbar.get_bar() or ''
+
+    -- Extract the components of the winbar
+    local saga_prefix = helper.extract_winbar_value(winbar_value, 'Prefix')
+    local saga_sep = helper.extract_winbar_value(winbar_value, 'SagaSep')
+    local saga_object = helper.extract_winbar_value(winbar_value, 'SagaObject')
+
+    -- Verify that components were extracted correctly
+    assert(saga_prefix, 'Prefix not found in winbar_value')
+    assert(saga_sep, 'Separator not found in winbar_value')
+    assert(saga_object, 'Symbol not found in winbar_value')
+
+    -- Optionally, check individual presence of prefix, separator, and symbol
+    assert(saga_prefix == '  ', 'Prefix does not match expected value')
+    assert(saga_sep == '|', 'Separator does not match expected value')
+    assert(saga_object == ' command', 'Symbol does not match expected value')
+  end)
+end)