Initial commit. Start with texlab.

2 files changed, 130 insertions, 0 deletions

diff --git a/lua/common_lsp/texlab.lua b/lua/common_lsp/texlab.lua
new file mode 100644
index 00000000..a0d8bd4f
--- /dev/null
+++ b/lua/common_lsp/texlab.lua
@@ -0,0 +1,89 @@
+local api = vim.api
+local validate = vim.validate
+local util = require 'common_lsp/util'
+local lsp = vim.lsp
+
+local M = {}
+
+local texlab_build_status = vim.tbl_add_reverse_lookup {
+	Success = 0;
+	Error = 1;
+	Failure = 2;
+	Cancelled = 3;
+}
+
+function M.texlab_buf_build(bufnr)
+	bufnr = util.validate_bufnr(bufnr)
+	local params = { textDocument = { uri = vim.uri_from_bufnr(bufnr) }  }
+	lsp.buf_request(bufnr, 'textDocument/build', params, function(err, method, result, client_id)
+		if err then error(tostring(err)) end
+		print("Build "..texlab_build_status[result.status])
+	end)
+end
+
+-- bufnr isn't actually required here, but we need a valid buffer in order to
+-- be able to find the client for buf_request.
+-- TODO find a client by looking through buffers for a valid client?
+function M.texlab_build_cancel_all(bufnr)
+	bufnr = util.validate_bufnr(bufnr)
+	local params = { token = "texlab-build-*" }
+	lsp.buf_request(bufnr, 'window/progress/cancel', params, function(err, method, result, client_id)
+		if err then error(tostring(err)) end
+		print("Cancel result", vim.inspect(result))
+	end)
+end
+
+-- TODO support more of https://github.com/microsoft/vscode-languageserver-node/blob/master/protocol/src/protocol.progress.proposed.md
+
+local default_config
+default_config = {
+	name = "texlab";
+	cmd = {"texlab"};
+	filetype = {"tex"};
+	build_log_level = lsp.protocol.MessageType.Warning;
+	build_args = {"-pdf", "-interaction=nonstopmode", "-synctex=1"};
+	build_executable = "latexmk";
+	build_on_save = false;
+	callbacks = {
+		["window/logMessage"] = function(err, method, params, client_id)
+			local client = lsp.get_client_by_id(client_id)
+			-- TODO(ashkan) If the client died, then we might as well show everything?
+			local build_log_level = client and client.config.build_log_level or lsp.protocol.MessageType.Log
+			-- local build_log_level = client and client.config.build_log_level or default_config.build_log_level
+			if params and params.type <= build_log_level then
+				lsp.builtin_callbacks[method](err, method, params, client_id)
+			end
+		end
+	}
+}
+
+local function run_command(command)
+	validate { command = { command, 's' } }
+	for line in vim.gsplit(command, "\n", true) do
+		api.nvim_command(line)
+	end
+end
+
+function M.texlab(config)
+	config = vim.tbl_extend("keep", config, default_config)
+	-- Deep merge is needed for callbacks.
+	for method, fn in pairs(default_config.callbacks) do
+		config.callbacks[method] = fn
+	end
+	config.on_attach = util.add_hook_after(config.on_attach, function(client, bufnr)
+		if bufnr == api.nvim_get_current_buf() then
+			M.texlab_setup_commands()
+		else
+			run_command(string.format("autocmd BufEnter <buffer=%d> ++once lua require'common_lsp/texlab'.texlab_setup_commands()", bufnr))
+		end
+	end)
+	lsp.add_filetype_config(config)
+end
+
+function M.texlab_setup_commands()
+	run_command [[
+		command! TexlabBuild lua require'common_lsp/texlab'.texlab_buf_build(0)
+	]]
+end
+
+return M
diff --git a/lua/common_lsp/util.lua b/lua/common_lsp/util.lua
new file mode 100644
index 00000000..8f398dee
--- /dev/null
+++ b/lua/common_lsp/util.lua
@@ -0,0 +1,41 @@
+local validate = vim.validate
+local api = vim.api
+
+local M = {}
+
+function M.validate_bufnr(bufnr)
+	validate {
+		bufnr = { bufnr, 'n' }
+	}
+	return bufnr == 0 and api.nvim_get_current_buf() or bufnr
+end
+
+function M.add_hook_before(fn, new_fn)
+	if fn then
+		return function(...)
+			-- TODO which result?
+			new_fn(...)
+			return fn(...)
+		end
+	else
+		return new_fn
+	end
+end
+
+function M.add_hook_after(fn, new_fn)
+	if fn then
+		return function(...)
+			-- TODO which result?
+			fn(...)
+			return new_fn(...)
+		end
+	else
+		return new_fn
+	end
+end
+
+local function split_lines(s)
+	return vim.split(s, "\n", true)
+end
+
+return M