Split editor canvas and project data to separate files

project.py

@@ -0,0 +1,29 @@
+import json
+
+class Project:
+    def __init__(self):
+        self.chars={}
+        self.char_res=(0,0)
+        self.path=None
+        self.loaded=False
+
+
+    def load(self,path):
+        with open(path, "r") as f:
+            project_data = json.load(f)
+            if not "char_width" in project_data or not "char_height" in project_data:
+                raise AttributeError("Character metrics information not found")
+            if not isinstance(project_data["char_width"],int) or not isinstance(project_data["char_height"],int):
+                raise AttributeError("Invalid character metrics type, expected int")
+            if not "chars" in project_data:
+                raise AttributeError("Character data not found")
+            if not isinstance(project_data["chars"],dict):
+                raise AttributeError("Invalid character data type, expected object")
+            self.chars=project_data["chars"]
+            self.char_res=(project_data["char_width"],project_data["char_height"])
+            self.path=path
+            self.loaded=True
+
+
+    def does_char_exist(self,c):
+        return chr(c) in self.chars