HEIC import, reimplement image change system

cinnamon-dynamic-wallpaper@TobiZog/5.4/scripts/cinnamon_pref_handler.py

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+import os, json
+
+class Cinnamon_Pref_Handler:
+  def __init__(self) -> None:
+    # Location of the Cinnamon preference file since Cinnamon 5.4
+    self.pref_location = os.path.expanduser("~") + \
+      "/.config/cinnamon/spices/cinnamon-dynamic-wallpaper@TobiZog/cinnamon-dynamic-wallpaper@TobiZog.json"
+    
+    self.prefs = {}
+
+    self.load_preferences()
+
+
+  def load_preferences(self):
+    with open(self.pref_location, "r") as pref_file:
+      pref_data = json.load(pref_file)
+
+    for i in pref_data:
+      try:
+        self.prefs[i] = pref_data[i]["value"]
+      except:
+        pass
+
+
+  def store_preferences(self):
+    with open(self.pref_location, "r") as pref_file:
+      pref_data = json.load(pref_file)
+
+    for i in pref_data:
+      try:
+        pref_data[i]["value"] = self.prefs[i]
+      except:
+        pass
+
+    with open(self.pref_location, "w") as pref_file:
+      json.dump(pref_data, pref_file, separators=(',', ':'), indent=4)