From 06476f3a28ab874407596ae433802d07ca399d64 Mon Sep 17 00:00:00 2001
From: yeger <yeger00@gmail.com>
Date: Fri, 21 Jun 2019 04:51:53 -0400
Subject: [PATCH] adding did change method

---
 classes.dot                | 21 ++++++++++---------
 pylspclient/lsp_client.py  | 15 +++++++++++++-
 pylspclient/lsp_structs.py | 41 ++++++++++++++++++++++++++++++++++++++
 3 files changed, 67 insertions(+), 10 deletions(-)

diff --git a/classes.dot b/classes.dot
index b88ad9f..39d9b6a 100644
--- a/classes.dot
+++ b/classes.dot
@@ -58,15 +58,18 @@ rankdir=BT
 "54" [label="Struct", shape="record"];
 "55" [label="SymbolInformation", shape="record"];
 "56" [label="SymbolKind", shape="record"];
-"57" [label="TextDocumentIdentifier", shape="record"];
-"58" [label="TextDocumentItem", shape="record"];
-"59" [label="TextDocumentPositionParams", shape="record"];
-"60" [label="TextEdit", shape="record"];
-"61" [label="TypeParameter", shape="record"];
-"62" [label="UnknownErrorCode", shape="record"];
-"63" [label="Variable", shape="record"];
-"64" [label="serverErrorEnd", shape="record"];
-"65" [label="serverErrorStart", shape="record"];
+"57" [label="TextDocumentContentChangeEvent", shape="record"];
+"58" [label="TextDocumentIdentifier", shape="record"];
+"59" [label="TextDocumentItem", shape="record"];
+"60" [label="TextDocumentPositionParams", shape="record"];
+"61" [label="TextEdit", shape="record"];
+"62" [label="TypeParameter", shape="record"];
+"63" [label="UnknownErrorCode", shape="record"];
+"64" [label="Variable", shape="record"];
+"65" [label="VersionedTextDocumentIdentifier", shape="record"];
+"66" [label="serverErrorEnd", shape="record"];
+"67" [label="serverErrorStart", shape="record"];
+"65" -> "58" [arrowhead="empty", arrowtail="none"];
 "29" -> "55" [arrowhead="diamond", arrowtail="none", fontcolor="green", label="location", style="solid"];
 "45" -> "47" [arrowhead="diamond", arrowtail="none", fontcolor="green", label="start", style="solid"];
 "45" -> "47" [arrowhead="diamond", arrowtail="none", fontcolor="green", label="end", style="solid"];
diff --git a/pylspclient/lsp_client.py b/pylspclient/lsp_client.py
index 2edae43..e7dce79 100644
--- a/pylspclient/lsp_client.py
+++ b/pylspclient/lsp_client.py
@@ -81,9 +81,22 @@ class LspClient(object):
         client needs to send a textDocument/didClose to the server followed by a textDocument/didOpen with the new language id if the server 
         handles the new language id as well.
 
-        :param TextDocumentItem textDocument: The initial trace setting. If omitted trace is disabled ('off').
+        :param TextDocumentItem textDocument: The document that was opened.
         """
         return self.lsp_endpoint.send_notification("textDocument/didOpen", textDocument=textDocument)
+    
+    
+    def didChange(self, textDocument, contentChanges):
+        """
+        The document change notification is sent from the client to the server to signal changes to a text document. 
+        In 2.0 the shape of the params has changed to include proper version numbers and language ids.
+
+        :param VersionedTextDocumentIdentifier textDocument: The initial trace setting. If omitted trace is disabled ('off').
+        :param TextDocumentContentChangeEvent[] contentChanges: The actual content changes. The content changes describe single state changes
+            to the document. So if there are two content changes c1 and c2 for a document in state S then c1 move the document 
+            to S' and c2 to S''.
+        """
+        return self.lsp_endpoint.send_notification("textDocument/didChange", textDocument=textDocument, contentChanges=contentChanges)
 
 
     def documentSymbol(self, textDocument):
diff --git a/pylspclient/lsp_structs.py b/pylspclient/lsp_structs.py
index d5f09ed..1123839 100644
--- a/pylspclient/lsp_structs.py
+++ b/pylspclient/lsp_structs.py
@@ -160,6 +160,47 @@ class TextDocumentIdentifier(object):
         """
         self.uri = uri
 
+
+class VersionedTextDocumentIdentifier(TextDocumentIdentifier):
+    """
+    An identifier to denote a specific version of a text document.
+    """
+    def __init__(self, uri, version):
+        """
+        Constructs a new TextDocumentIdentifier instance.
+        
+        :param DocumentUri uri: The text document's URI.
+        :param int version: The version number of this document. If a versioned 
+            text document identifier is sent from the server to the client and 
+            the file is not open in the editor (the server has not received an 
+            open notification before) the server can send `null` to indicate 
+            that the version is known and the content on disk is the truth (as 
+            speced with document content ownership).
+	    The version number of a document will increase after each change, including
+	    undo/redo. The number doesn't need to be consecutive.
+        """
+        super(VersionedTextDocumentIdentifier, self).__init__(uri)
+        self.version = version
+
+
+class TextDocumentContentChangeEvent(object):
+    """
+    An event describing a change to a text document. If range and rangeLength are omitted
+    the new text is considered to be the full content of the document.
+    """
+    def __init__(self, range, rangeLength, text):
+        """
+        Constructs a new TextDocumentContentChangeEvent instance.
+
+        :param Range range: The range of the document that changed.
+        :param int rangeLength: The length of the range that got replaced.
+        :param str text: The new text of the range/document.
+        """
+        self.range = range
+        self.rangeLength = rangeLength
+        self.text = text
+
+
 class TextDocumentPositionParams(object):
     """
     A parameter literal used in requests to pass a text document and a position inside that document.