Remove word extraction from textEdit.

When textEdit.range.start.character is larger than complete_position,
it is problematic trying to extract.

Close #795.

Author: autozimu

src/types.rs

@@ -527,33 +527,15 @@ pub struct VimCompleteItemUserData {
 
 impl VimCompleteItem {
     pub fn from_lsp(lspitem: &CompletionItem, complete_position: Option<u64>) -> Fallible<Self> {
+        info!(
+            "LSP CompletionItem to VimCompleteItem: {:?}, {:?}",
+            lspitem, complete_position
+        );
         let abbr = lspitem.label.clone();
-        let mut word = lspitem.insert_text.clone().unwrap_or_default();
-        if word.is_empty() {
-            match (lspitem.text_edit.clone(), complete_position) {
-                (Some(ref text_edit), Some(complete_position))
-                    if !text_edit.new_text.is_empty() =>
-                {
-                    // TextEdit range start might be different from vim expected completion start.
-                    // From spec, TextEdit can only span one line, i.e., the current line.
-                    if text_edit.range.start.character != complete_position {
-                        word = text_edit
-                            .new_text
-                            .get((complete_position as usize)..)
-                            .and_then(|line| line.split_whitespace().next())
-                            .map_or_else(String::new, ToOwned::to_owned);
-                    } else {
-                        word = text_edit.new_text.clone();
-                    }
-                }
-                (Some(ref text_edit), _) if !text_edit.new_text.is_empty() => {
-                    word = text_edit.new_text.clone();
-                }
-                (_, _) => {
-                    word = lspitem.label.clone();
-                }
-            }
-        }
+        let word = lspitem
+            .insert_text
+            .clone()
+            .unwrap_or_else(|| lspitem.label.clone());
 
         let snippet;
         if lspitem.insert_text_format == Some(InsertTextFormat::Snippet) {