use nvim-jdtls instead of nvim-cmp

1 files changed, 53 insertions, 3 deletions

diff --git a/config/essentials/nvim/ftplugin/java.lua b/config/essentials/nvim/ftplugin/java.lua
index eeaff47..9cb52e1 100644
--- a/config/essentials/nvim/ftplugin/java.lua
+++ b/config/essentials/nvim/ftplugin/java.lua
@@ -1,3 +1,53 @@
-vim.keymap.set({"n", "i"}, "<LocalLeader>t", "<cmd>s/\\(\\s*\\)\\(.*\\)/\\1System.out.print(\"\\2\");<cr>")
-vim.keymap.set({"n", "i"}, "<LocalLeader>i", "<cmd>s/\\(\\s*\\)\\(.*\\)/\\1System.out.print(\"\\2: \" + \\2);<cr>")
-vim.keymap.set({"n", "i"}, "<LocalLeader>l", "<cmd>s/print(/println(/<cr>")
+local home = os.getenv('HOME')
+local root_markers = {'gradlew', 'mvnw', '.git'}
+local root_dir = require('jdtls.setup').find_root(root_markers)
+local workspace_folder = home .. "/.local/share/eclipse/" .. vim.fn.fnamemodify(root_dir, ":p:h:t")
+
+function nnoremap(rhs, lhs, bufopts, desc)
+  bufopts.desc = desc
+  vim.keymap.set("n", rhs, lhs, bufopts)
+end
+
+local on_attach = function(client, bufnr)
+  -- Regular Neovim LSP client keymappings
+  local bufopts = { noremap=true, silent=true, buffer=bufnr }
+  nnoremap('gD', vim.lsp.buf.declaration, bufopts, "Go to declaration")
+  nnoremap('gd', vim.lsp.buf.definition, bufopts, "Go to definition")
+  nnoremap('gi', vim.lsp.buf.implementation, bufopts, "Go to implementation")
+  nnoremap('K', vim.lsp.buf.hover, bufopts, "Hover text")
+  nnoremap('<C-k>', vim.lsp.buf.signature_help, bufopts, "Show signature")
+  nnoremap('<space>wa', vim.lsp.buf.add_workspace_folder, bufopts, "Add workspace folder")
+  nnoremap('<space>wr', vim.lsp.buf.remove_workspace_folder, bufopts, "Remove workspace folder")
+  nnoremap('<space>wl', function()
+    print(vim.inspect(vim.lsp.buf.list_workspace_folders()))
+  end, bufopts, "List workspace folders")
+  nnoremap('<space>D', vim.lsp.buf.type_definition, bufopts, "Go to type definition")
+  nnoremap('<space>rn', vim.lsp.buf.rename, bufopts, "Rename")
+  nnoremap('<space>ca', vim.lsp.buf.code_action, bufopts, "Code actions")
+  vim.keymap.set('v', "<space>ca", "<ESC><CMD>lua vim.lsp.buf.range_code_action()<CR>",
+    { noremap=true, silent=true, buffer=bufnr, desc = "Code actions" })
+  nnoremap('<space>f', function() vim.lsp.buf.format { async = true } end, bufopts, "Format file")
+
+  -- Java extensions provided by jdtls
+  nnoremap("<C-o>", jdtls.organize_imports, bufopts, "Organize imports")
+  nnoremap("<space>ev", jdtls.extract_variable, bufopts, "Extract variable")
+  nnoremap("<space>ec", jdtls.extract_constant, bufopts, "Extract constant")
+  vim.keymap.set('v', "<space>em", [[<ESC><CMD>lua require('jdtls').extract_method(true)<CR>]],
+    { noremap=true, silent=true, buffer=bufnr, desc = "Extract method" })
+end
+
+local config = {
+	flags = {
+		debounce_text_changes = 80,
+	},
+	cmd = {
+		'jdtls',
+		'-Dlog.protocol=true',
+		'-Dlog.level=ALL',
+		'-Xms4g',
+		'-data', workspace_folder,
+	},
+	on_attach = on_attach,
+	root_dir = root_dir,
+}
+require('jdtls').start_or_attach(config)