pyGHDL/lsp: update, handle hover

1 files changed, 34 insertions, 5 deletions

diff --git a/pyGHDL/lsp/document.py b/pyGHDL/lsp/document.py
index 2656606c6..1a6a20f39 100644
--- a/pyGHDL/lsp/document.py
+++ b/pyGHDL/lsp/document.py
@@ -9,6 +9,8 @@ import pyGHDL.libghdl.vhdl.nodes as nodes
 import pyGHDL.libghdl.vhdl.sem_lib as sem_lib
 import pyGHDL.libghdl.vhdl.sem as sem
 import pyGHDL.libghdl.vhdl.formatters as formatters
+import pyGHDL.libghdl.vhdl.prints as prints
+import pyGHDL.libghdl.file_comments as file_comments
 
 from . import symbols, references
 
@@ -197,7 +199,34 @@ class Document(object):
 
     def goto_definition(self, position):
         loc = self.position_to_location(position)
-        return references.goto_definition(self._tree, loc)
+        return references.find_definition_by_loc(self._tree, loc)
+
+    def hover(self, position):
+        loc = self.position_to_location(position)
+        t = references.find_definition_by_loc(self._tree, loc)
+        if t is None:
+            return None
+
+        # Regenerate the declaration
+        hand = prints.Allocate_Handle()
+        prints.Print_String(t, hand)
+        buffer = prints.Get_C_String(hand)
+        buf_len = prints.Get_Length(hand)
+        if buf_len == 0:
+            res = None
+        else:
+            txt = ''
+            t_loc = nodes.Get_Location(t)
+            t_fe = files_map.Location_To_File(t_loc)
+            comm = file_comments.Find_First_Comment(t_fe, t)
+            while comm != file_comments.No_Comment_Index:
+                txt += file_comments.Get_Comment(t_fe, comm) + '\n'
+                comm = file_comments.Get_Next_Comment(t_fe, comm)
+            newtext = buffer[:buf_len].decode(Document.encoding)
+            txt += "```vhdl\n" + newtext + "\n```"
+            res = {'contents': { 'kind': 'markdown', 'value': txt }}
+        prints.Free_Handle(hand)
+        return res
 
     def format_range(self, rng):
         first_line = rng["start"]["line"] + 1
@@ -206,10 +235,10 @@ class Document(object):
             return None
         if self._tree == nodes.Null_Iir:
             return None
-        hand = formatters.Allocate_Handle()
+        hand = prints.Allocate_Handle()
         formatters.Indent_String(self._tree, hand, first_line, last_line)
-        buffer = formatters.Get_C_String(hand)
-        buf_len = formatters.Get_Length(hand)
+        buffer = prints.Get_C_String(hand)
+        buf_len = prints.Get_Length(hand)
         newtext = buffer[:buf_len].decode(Document.encoding)
         res = [
             {
@@ -220,5 +249,5 @@ class Document(object):
                 "newText": newtext,
             }
         ]
-        formatters.Free_Handle(hand)
+        prints.Free_Handle(hand)
         return res