revamp installing fonts

__init__.py

@@ -314,7 +314,7 @@ class ABC3D_PT_LoadFontPanel(bpy.types.Panel):
 
         layout.label(text="Install FontFile:")
         layout.row().prop(abc3d, "font_path")
-        layout.row().operator(f"{__name__}.loadfont", text='Install and load Font')
+        layout.row().operator(f"{__name__}.install_font", text='Install')
 
 
 class ABC3D_PT_FontList(bpy.types.Panel):
@@ -579,13 +579,39 @@ class ABC3D_PT_TextPropertiesPanel(bpy.types.Panel):
         layout.column().prop(props, "translation")
         layout.column().prop(props, "orientation")
 
-class ABC3D_OT_LoadFont(bpy.types.Operator):
+class ABC3D_OT_InstallFont(bpy.types.Operator):
-    """Load Fontfile from path above.
+    """Install or load Fontfile from path above.
 (Format must be *.glb or *.gltf)"""
-    bl_idname = f"{__name__}.loadfont"
+    bl_idname = f"{__name__}.install_font"
     bl_label = "Load Font"
     bl_options = {'REGISTER', 'UNDO'}
 
+    install_in_assets: bpy.props.BoolProperty(
+            name="install in assets",
+            description="install the font in the assets directory of the addon",
+            )
+
+    load_into_memory: bpy.props.BoolProperty(name="load font data into memory",
+                                             description="if false, it will load font data on demand",
+                                             default=False)
+
+    def draw(self, context):
+        layout = self.layout
+        layout.row().prop(self, "install_in_assets")
+        if not self.install_in_assets and not self.load_into_memory:
+            layout.label(text="If the fontfile is not installed,")
+            layout.label(text="and the font is not loaded in memory completely,")
+            layout.label(text="the fontfile should not be moved.")
+        layout.row().prop(self, "load_into_memory")
+        if self.load_into_memory:
+            layout.label(text="Loading font files can take a long time")
+            layout.label(text="and use a lot of RAM.")
+            layout.label(text="We recommend not doing this and let us")
+            layout.label(text="load the font data on demand.")
+
+    def invoke(self, context, event):
+        return context.window_manager.invoke_props_dialog(self)
+
     def execute(self, context):
         scene = bpy.context.scene
 
@@ -593,11 +619,28 @@ class ABC3D_OT_LoadFont(bpy.types.Operator):
             butils.ShowMessageBox(
                 title=f"{__name__} Warning",
                 icon="ERROR",
-                message=f"We believe the font path ({scene[__name__].font_path}) does not exist.",
+                message=f"We believe the font path ({scene.abc3d.font_path}) does not exist.",
                 )
             return {'CANCELLED'}
 
-        butils.load_font_from_filepath(scene.abc3d.font_path)
+        if self.install_in_assets: 
+            preferences = getPreferences(context)
+            filename = os.path.basename(scene.abc3d.font_path)
+            target = os.path.join(preferences.assets_dir, "fonts", filename)
+            print(f"installing {scene.abc3d.font_path} -> {target}")
+            import shutil
+            shutil.copyfile(scene.abc3d.font_path, target)
+            # def register_load(target, load=False):
+                # print(f"registering installed fonts")
+            # bpy.app.timers.register(lambda: register_load(target, self.load_into_memory), first_interval=5)
+            butils.register_font_from_filepath(target)
+            if self.load_into_memory:
+                butils.load_font_from_filepath(target)
+            butils.update_available_fonts()
+        else: 
+            butils.register_font_from_filepath(scene.abc3d.font_path)
+            if self.load_into_memory:
+                butils.load_font_from_filepath(scene.abc3d.font_path)
 
         return {'FINISHED'}
 
@@ -1219,7 +1262,7 @@ classes = (
             ABC3D_OT_AlignMetrics,
             ABC3D_OT_TemporaryHelper,
             ABC3D_OT_PlaceText,
-            ABC3D_OT_LoadFont,
+            ABC3D_OT_InstallFont,
             ABC3D_OT_ToggleABC3DCollection,
             ABC3D_OT_SaveFontToFile,
             ABC3D_OT_CreateFontFromObjects,

bimport.py

@@ -25,7 +25,7 @@ def get_font_faces_in_file(filepath):
         for node in gltf_importer.data.nodes:
             if type(node.extras) != type(None) \
                     and "glyph" in node.extras \
-                    and not ("type" in node.extras and node.extras["type"] is "metrics"):
+                    and not ("type" in node.extras and node.extras["type"] == "metrics"):
                 out.append(node.extras)
         return out
     

butils.py

@@ -509,7 +509,7 @@ def clear_available_fonts():
 
 def load_installed_fonts():
     preferences = getPreferences(bpy.context)
-    font_dir = f"{preferences.assets_dir}/fonts"
+    font_dir = os.path.join(preferences.assets_dir,"fonts")
     for file in os.listdir(font_dir):
         if file.endswith(".glb") or file.endswith(".gltf"):
             font_path = os.path.join(font_dir, file)
@@ -522,7 +522,7 @@ def load_installed_fonts():
 
 def register_installed_fonts():
     preferences = getPreferences(bpy.context)
-    font_dir = f"{preferences.assets_dir}/fonts"
+    font_dir = os.path.join(preferences.assets_dir,"fonts")
     for file in os.listdir(font_dir):
         if file.endswith(".glb") or file.endswith(".gltf"):
             font_path = os.path.join(font_dir, file)