1 files changed, 136 insertions, 0 deletions
diff --git a/runtime/lua/vim/lsp/buf.lua b/runtime/lua/vim/lsp/buf.lua
new file mode 100644
index 0000000000..a6a05fb095
--- /dev/null
+++ b/runtime/lua/vim/lsp/buf.lua
@@ -0,0 +1,136 @@
+local vim = vim
+local validate = vim.validate
+local api = vim.api
+local vfn = vim.fn
+local util = require 'vim.lsp.util'
+local list_extend = vim.list_extend
+
+local M = {}
+
+local function ok_or_nil(status, ...)
+  if not status then return end
+  return ...
+end
+local function npcall(fn, ...)
+  return ok_or_nil(pcall(fn, ...))
+end
+
+local function request(method, params, callback)
+  validate {
+    method = {method, 's'};
+    callback = {callback, 'f', true};
+  }
+  return vim.lsp.buf_request(0, method, params, callback)
+end
+
+function M.hover()
+  local params = util.make_position_params()
+  request('textDocument/hover', params)
+end
+
+function M.peek_definition()
+  local params = util.make_position_params()
+  request('textDocument/peekDefinition', params)
+end
+
+
+function M.declaration()
+  local params = util.make_position_params()
+  request('textDocument/declaration', params)
+end
+
+function M.definition()
+  local params = util.make_position_params()
+  request('textDocument/definition', params)
+end
+
+function M.type_definition()
+  local params = util.make_position_params()
+  request('textDocument/typeDefinition', params)
+end
+
+function M.implementation()
+  local params = util.make_position_params()
+  request('textDocument/implementation', params)
+end
+
+function M.signature_help()
+  local params = util.make_position_params()
+  request('textDocument/signatureHelp', params)
+end
+
+-- TODO(ashkan) ?
+function M.completion(context)
+  local params = util.make_position_params()
+  params.context = context
+  return request('textDocument/completion', params)
+end
+
+function M.formatting(options)
+  validate { options = {options, 't', true} }
+  options = vim.tbl_extend('keep', options or {}, {
+    tabSize = vim.bo.tabstop;
+    insertSpaces = vim.bo.expandtab;
+  })
+  local params = {
+    textDocument = { uri = vim.uri_from_bufnr(0) };
+    options = options;
+  }
+  return request('textDocument/formatting', params)
+end
+
+function M.range_formatting(options, start_pos, end_pos)
+  validate {
+    options = {options, 't', true};
+    start_pos = {start_pos, 't', true};
+    end_pos = {end_pos, 't', true};
+  }
+  options = vim.tbl_extend('keep', options or {}, {
+    tabSize = vim.bo.tabstop;
+    insertSpaces = vim.bo.expandtab;
+  })
+  local A = list_extend({}, start_pos or api.nvim_buf_get_mark(0, '<'))
+  local B = list_extend({}, end_pos or api.nvim_buf_get_mark(0, '>'))
+  -- convert to 0-index
+  A[1] = A[1] - 1
+  B[1] = B[1] - 1
+  -- account for encoding.
+  if A[2] > 0 then
+    A = {A[1], util.character_offset(0, A[1], A[2])}
+  end
+  if B[2] > 0 then
+    B = {B[1], util.character_offset(0, B[1], B[2])}
+  end
+  local params = {
+    textDocument = { uri = vim.uri_from_bufnr(0) };
+    range = {
+      start = { line = A[1]; character = A[2]; };
+      ["end"] = { line = B[1]; character = B[2]; };
+    };
+    options = options;
+  }
+  return request('textDocument/rangeFormatting', params)
+end
+
+function M.rename(new_name)
+  -- TODO(ashkan) use prepareRename
+  -- * result: [`Range`](#range) \| `{ range: Range, placeholder: string }` \| `null` describing the range of the string to rename and optionally a placeholder text of the string content to be renamed. If `null` is returned then it is deemed that a 'textDocument/rename' request is not valid at the given position.
+  local params = util.make_position_params()
+  new_name = new_name or npcall(vfn.input, "New Name: ")
+  if not (new_name and #new_name > 0) then return end
+  params.newName = new_name
+  request('textDocument/rename', params)
+end
+
+function M.references(context)
+  validate { context = { context, 't', true } }
+  local params = util.make_position_params()
+  params.context = context or {
+    includeDeclaration = true;
+  }
+  params[vim.type_idx] = vim.types.dictionary
+  request('textDocument/references', params)
+end
+
+return M
+-- vim:sw=2 ts=2 et