webenginepreview: Cache zoom factor between tabs and runs

Fixes #383.

Author: mitya57

ReText/__init__.py

@@ -94,6 +94,7 @@ def getBundledIcon(iconName):
     'lastTabIndex': 0,
     'recentFileList': [],
     'splitterState': QByteArray(),
+    'webEngineZoomFactor': 1.0,
     'windowGeometry': QByteArray(),
 }
 

ReText/webenginepreview.py

@@ -35,7 +35,7 @@
 from PyQt6.QtWebEngineWidgets import QWebEngineView
 from PyQt6.QtWidgets import QApplication, QLabel
 
-from ReText import globalSettings
+from ReText import globalCache, globalSettings
 from ReText.editor import getColor
 from ReText.syncscroll import SyncScroll
 
@@ -236,7 +236,12 @@ def _handleEditorResized(self, rect):
 
     def wheelEvent(self, event):
         if QGuiApplication.keyboardModifiers() == Qt.KeyboardModifier.ControlModifier:
-            zoomFactor = self.zoomFactor()
-            zoomFactor *= 1.001 ** event.angleDelta().y()
-            self.setZoomFactor(zoomFactor)
+            newZoomFactor = globalCache.webEngineZoomFactor * (1.001 ** event.angleDelta().y())
+            # Valid values are within the range from 0.25 to 5.0.
+            globalCache.webEngineZoomFactor = max(min(newZoomFactor, 5.0), 0.25)
+            self.setZoomFactor(globalCache.webEngineZoomFactor)
         return super().wheelEvent(event)
+
+    def showEvent(self, event):
+        self.setZoomFactor(globalCache.webEngineZoomFactor)
+        return super().showEvent(event)

configuration.md

@@ -62,6 +62,7 @@ that are set internally by ReText and should never be set manually:
 - `lastTabIndex`
 - `recentFileList`
 - `splitterState`
+- `webEngineZoomFactor`
 - `windowGeometry`
 
 Icon themes