From 40e6849127c0f0e19ce5c29e15449622804eb97b Mon Sep 17 00:00:00 2001
From: dylan madisetti <dylan@madisetti.me>
Date: Sat, 6 May 2023 18:29:40 -0400
Subject: [PATCH] Reuse exisiting buffer to solve double buffer problem
 da-h/AirLatex.vim#25

---
 rplugin/python3/airlatex/documentbuffer.py | 23 ++++++++++++++++------
 rplugin/python3/airlatex/sidebar.py        |  9 +++++++++
 2 files changed, 26 insertions(+), 6 deletions(-)

diff --git a/rplugin/python3/airlatex/documentbuffer.py b/rplugin/python3/airlatex/documentbuffer.py
index 8e48cfa..a6a5b6a 100644
--- a/rplugin/python3/airlatex/documentbuffer.py
+++ b/rplugin/python3/airlatex/documentbuffer.py
@@ -20,10 +20,21 @@ def __init__(self, path, nvim):
         self.buffer_mutex = RLock()
         self.saved_buffer = None
 
-    def getName(self):
-        return "/".join([p["name"] for p in self.path])
-    def getExt(self):
-        return self.document["name"].split(".")[-1]
+    @staticmethod
+    def getName(path):
+        return "/".join([p["name"] for p in path])
+
+    @staticmethod
+    def getExt(document):
+        return document["name"].split(".")[-1]
+
+    @property
+    def name(self):
+        return DocumentBuffer.getName(self.path)
+
+    @property
+    def ext(self):
+        return DocumentBuffer.getExt(self.document)
 
     def initDocumentBuffer(self):
         self.log.debug_gui("initDocumentBuffer")
@@ -31,7 +42,7 @@ def initDocumentBuffer(self):
         # Creating new Buffer
         self.nvim.command('wincmd w')
         self.nvim.command('enew')
-        self.nvim.command('file '+ self.getName())
+        self.nvim.command('file '+ self.name)
         self.buffer = self.nvim.current.buffer
         DocumentBuffer.allBuffers[self.buffer] = self
 
@@ -39,7 +50,7 @@ def initDocumentBuffer(self):
         self.nvim.command("syntax on")
         self.nvim.command('setlocal noswapfile')
         self.nvim.command('setlocal buftype=nofile')
-        self.nvim.command("set filetype="+self.getExt())
+        self.nvim.command("set filetype=" + self.ext)
 
         # ??? Returning normal function to these buttons
         # self.nvim.command("nmap <silent> <up> <up>")
diff --git a/rplugin/python3/airlatex/sidebar.py b/rplugin/python3/airlatex/sidebar.py
index 7d44372..0f078bd 100644
--- a/rplugin/python3/airlatex/sidebar.py
+++ b/rplugin/python3/airlatex/sidebar.py
@@ -355,5 +355,14 @@ def cursorAction(self, key="enter"):
 
         # is file
         elif self.cursorPos[-1]["type"] == "file":
+            name = DocumentBuffer.getName(self.cursorPos)
+            for buffer, document in DocumentBuffer.allBuffers.items():
+                self.log.debug_gui("{name} vs {document.name}")
+                if name == document.name:
+                    self.nvim.command('wincmd w')
+                    self.nvim.command('enew')
+                    self.nvim.command(f'buffer {buffer.number}')
+                    return
             documentbuffer = DocumentBuffer(self.cursorPos, self.nvim)
             create_task(self.cursorPos[0]["handler"].joinDocument(documentbuffer))
+