do not open same file twice

bigtext.py

@@ -24,6 +24,7 @@ class BigText(QWidget):
     def __init__(self, model: LogFileModel, settings: Settings):
         super(BigText, self).__init__()
 
+        self.model = model
         self.grid = QGridLayout()
         self.grid.setContentsMargins(0, 0, 0, 0)
         self.grid.setHorizontalSpacing(0)
@@ -46,6 +47,9 @@ class BigText(QWidget):
         self.grid.addWidget(self.h_scroll_bar, 1, 0)
         self.grid.addWidget(self.v_scroll_bar, 0, 1)
 
+    def get_file(self):
+        return self.model.get_file()
+
 
 class InnerBigText(QWidget):
     _byte_offset = 0

logFileModel.py

@@ -10,7 +10,13 @@ class LogFileModel:
     _lock = threading.RLock()
 
     def __init__(self, file):
-        self._file = file
+        self._file = os.path.realpath(file)
+
+    def get_file(self):
+        return self._file
+
+    def __str__(self):
+        return self._file
 
     def get_tab_name(self):
         file_name = os.path.basename(self._file)

main.py

@@ -11,6 +11,7 @@ import sys
 from bigtext import BigText
 from logFileModel import LogFileModel
 from settings import Settings
+from tabs import Tabs
 
 MAX_LINE_LENGTH = 4096
 
@@ -23,9 +24,9 @@ class MainWindow(QMainWindow):
         self.setGeometry(0, 0, 640, 480)
         self.setDockNestingEnabled(True)
 
-        self.tabs = self.create_tabs()
-        self.create_tab("/home/andi/ws/performanceDb/data/production/logs_2018-09-06_2018-09-06.csv")
-        self.create_tab("/home/andi/ws/ravenlog/example.log")
+        self.tabs = Tabs(self.settings)
+        self.tabs.create_tab("/home/andi/ws/performanceDb/data/production/logs_2018-09-06_2018-09-06.csv")
+        self.tabs.create_tab("/home/andi/ws/ravenlog/example.log")
 
 
         self.setCentralWidget(self.tabs)
@@ -54,23 +55,6 @@ class MainWindow(QMainWindow):
     def on_follow_file_changed(self, e):
         print(e)
 
-    def create_tabs(self) -> QTabWidget:
-        tabs = QTabWidget()
-        tabs.setTabsClosable(True)
-        tabs.tabCloseRequested.connect(lambda index: tabs.removeTab(index) )
-        return tabs
-
-    def create_tab(self, file: str):
-        if not os.path.isfile(file):
-            message = QMessageBox(QMessageBox.Icon.Warning, "File not found", "'%s' is not a file or cannot be opened" % (file))
-            message.exec()
-            return
-
-        model = LogFileModel(file)
-        big_text = BigText(model, self.settings)
-        self.tabs.addTab(big_text, model.get_tab_name())
-        # open the new tab
-        self.tabs.setCurrentIndex(self.tabs.count()-1)
 
     def create_menu_bar(self) -> QMenuBar:
         menu_bar = QMenuBar()
@@ -93,7 +77,7 @@ class MainWindow(QMainWindow):
     def _open_file(self) -> None:
         dialog = QFileDialog(self)
         (selected_file, _filter) = dialog.getOpenFileName(caption=self.tr("Open File"))
-        self.create_tab(selected_file)
+        self.tabs.create_tab(selected_file)
 
 
 

tabs.py

@@ -0,0 +1,58 @@
+import os
+from typing import Mapping
+
+from PyQt6.QtWidgets import *
+from PyQt6.QtCore import *
+from PyQt6.QtGui import *
+
+from bigtext import BigText
+from logFileModel import LogFileModel
+from settings import Settings
+
+class Tabs(QWidget):
+
+    tabs_by_index = {}
+    tabs_by_filename = {}
+
+    def __init__(self, settings: Settings):
+        super(Tabs, self).__init__()
+
+        self.settings = settings
+
+        self.tabs = QTabWidget()
+        self.tabs.setTabsClosable(True)
+        self.tabs.setMovable(True)
+        self.tabs.tabCloseRequested.connect(self._close_tab)
+
+        self.layout = QVBoxLayout(self)
+        self.layout.setContentsMargins(0, 0, 0, 0)
+
+        self.layout.addWidget(self.tabs)
+
+    def create_tab(self, file: str):
+        if not os.path.isfile(file):
+            message = QMessageBox(QMessageBox.Icon.Warning, "File not found",
+                                  "'%s' is not a file or cannot be opened" % (file))
+            message.exec()
+            return
+
+        model = LogFileModel(file)
+        big_text = BigText(model, self.settings)
+
+        if big_text.get_file() in self.tabs_by_filename:
+            for tab_index in range(0, self.tabs.count()):
+                widget : BigText = self.tabs.widget(tab_index)
+                if widget.get_file() == big_text.get_file():
+                    self.tabs.setCurrentIndex(tab_index)
+                    break
+        else:
+            tab_index = self.tabs.addTab(big_text, model.get_tab_name())
+            self.tabs_by_filename[big_text.get_file()] = big_text
+            self.tabs.setCurrentIndex(tab_index)
+
+    def _close_tab(self, tab_index: int):
+        big_text: BigText = self.tabs.widget(tab_index)
+        del self.tabs_by_filename[big_text.get_file()]
+        self.tabs.removeTab(tab_index)
+
+