save font file

__init__.py

@@ -31,6 +31,7 @@ else:
     from . import butils
 
 import bpy
+import queue
 import math
 import mathutils
 import io
@@ -122,30 +123,69 @@ class FONT3D_OT_Font3D(bpy.types.Operator):
 
 
 class FONT3D_settings(bpy.types.PropertyGroup):
-    font_path: bpy.props.StringProperty(name="Font path",
-                                        description="Where is the font",
-                                        default="",
-                                        maxlen=1024,
-                                        subtype="FILE_PATH")
-    import_infix: bpy.props.StringProperty(name="Font name import infix",
-                                           description="The infix which all font objects to import have",
-                                           default="_NM_",
-                                           maxlen=1024,
-                                           )
-    test_text: bpy.props.StringProperty(name="Test Text",
-                                           description="the text to test with",
-                                           default="Hello",
-                                           maxlen=1024,
-                                           )
-
+    font_path: bpy.props.StringProperty(
+            name="Font path",
+            description="Where is the font",
+            default="",
+            maxlen=1024,
+            subtype="FILE_PATH")
+    import_infix: bpy.props.StringProperty(
+            name="Font name import infix",
+            description="The infix which all font objects to import have",
+            default="_NM_",
+            maxlen=1024,
+            )
+    test_text: bpy.props.StringProperty(
+            name="Test Text",
+            description="the text to test with",
+            default="HELLO",
+            maxlen=1024,
+            )
+    the_mother_of_typography: bpy.props.PointerProperty(
+            name="The Mother Of Typography",
+            description="The target, which will be populated by character children of text.",
+            type=bpy.types.Object,
+            )
+    letter_spacing: bpy.props.FloatProperty(
+            name="Letter Spacing",
+            description="Letter Spacing",
+            default=0.0,
+            options={'ANIMATABLE'},
+            )
 
 class FONT3D_available_font(bpy.types.PropertyGroup):
-    font_name: bpy.props.StringProperty(name="whatever")
+    font_name: bpy.props.StringProperty(name="")
+
+class FONT3D_glyph_properties(bpy.types.PropertyGroup):
+    glyph_id: bpy.props.StringProperty(maxlen=1)
+    glyph_object: bpy.props.PointerProperty(type=bpy.types.Object)
+    letter_spacing: bpy.props.FloatProperty(
+            name="Letter Spacing",
+            description="Letter Spacing",
+            )
+
+class FONT3D_text_properties(bpy.types.PropertyGroup):
+    def update_callback(self, context):
+        butils.set_text_on_curve(self)
+    font_name: bpy.props.StringProperty()
+    font_face: bpy.props.StringProperty()
+    text_object: bpy.props.PointerProperty(type=bpy.types.Object)
+    text: bpy.props.StringProperty()
+    letter_spacing: bpy.props.FloatProperty(
+            update=update_callback,
+            name="Letter Spacing",
+            description="Letter Spacing",
+            step=0.01,
+            )
+    distribution_type: bpy.props.StringProperty()
+    glyphs: bpy.props.CollectionProperty(type=FONT3D_glyph_properties)
 
 #TODO: simply, merge, cut cut cut
 class FONT3D_data(bpy.types.PropertyGroup):
-    available_fonts: bpy.props.CollectionProperty(type=FONT3D_available_font, name="name of the collection poporotery")
+    available_fonts: bpy.props.CollectionProperty(type=FONT3D_available_font, name="name of the collection property")
     active_font_index: bpy.props.IntProperty()
+    available_texts: bpy.props.CollectionProperty(type=FONT3D_text_properties, name="")
+    active_text_index: bpy.props.IntProperty()
 
 class FONT3D_UL_fonts(bpy.types.UIList):
     def draw_item(self, context, layout, data, item, icon, active_data, active_propname, index):
@@ -158,6 +198,34 @@ class FONT3D_UL_fonts(bpy.types.UIList):
     def invoke(self, context, event):
         pass
 
+class FONT3D_UL_texts(bpy.types.UIList):
+    def draw_item(self, context, layout, data, item, icon, active_data, active_propname, index):
+        split = layout.split(factor=0.3)
+        split.label(text="Index: %d" % (index))
+        # custom_icon = "OUTLINER_OB_%s" % item.obj_type
+        # split.prop(item, "name", text="", emboss=False, translate=False)
+        split.label(text=f"{item.text}") # avoids renaming the item by accident
+
+    def invoke(self, context, event):
+        pass
+
+# TODO: TODO: TODO: TODO: TODO # >>>>>>>>>>>>>>>>
+execution_queue = queue.Queue()
+
+
+# This function can safely be called in another thread.
+# The function will be executed when the timer runs the next time.
+def run_in_main_thread(function):
+    execution_queue.put(function)
+
+
+def execute_queued_functions():
+    while not execution_queue.empty():
+        function = execution_queue.get()
+        function()
+    return 1.0
+
+# <<<<<<<<<<<<<<<<< TODO: TODO: TODO: TODO: TODO #
 
 class FONT3D_PT_panel(bpy.types.Panel):
     bl_label = "Panel for Font3D"
@@ -165,6 +233,20 @@ class FONT3D_PT_panel(bpy.types.Panel):
     bl_space_type = "VIEW_3D"
     bl_region_type = "UI"
 
+    @classmethod
+    def poll(self, context):
+        scene = context.scene
+        font3d = scene.font3d
+        font3d_data = scene.font3d_data
+        # TODO: properly include this
+        def lol():
+            font3d_data.active_text_index = -1
+            # print(f"{utils.get_timestamp()} ors something")
+
+        run_in_main_thread(lol)
+
+        return True
+
     def draw(self, context):
         global shared
         layout = self.layout
@@ -181,15 +263,57 @@ class FONT3D_PT_panel(bpy.types.Panel):
         layout.template_list("FONT3D_UL_fonts", "", font3d_data, "available_fonts", font3d_data, "active_font_index")
         layout.label(text='DEBUG')
         layout.row().prop(font3d, "test_text")
-        layout.row().operator('font3d.testfont', text='Test Font')
+        layout.row().prop(font3d, "the_mother_of_typography")
+        layout.row().operator('font3d.testfont', text='Distribute')
+        layout.label(text="Text Objects")
+        layout.template_list("FONT3D_UL_texts", "", font3d_data, "available_texts", font3d_data, "active_text_index")
+        layout.label(text="font properties")
+        layout.row().prop(font3d, "letter_spacing")
         layout.label(text="font creation")
         layout.row().prop(font3d, "import_infix")
         layout.row().operator('font3d.create_font_from_objects', text='Create Font')
         layout.row().separator()
         layout.row().operator('font3d.save_font_to_file', text='Save Font To File')
         layout.row().operator('font3d.toggle_font3d_collection', text='Toggle Collection')
+        layout.row().operator('font3d.temporaryhelper', text='Temporary Helper')
         layout.label(text='DEBUG END')
 
+class FONT3D_PT_TextPropertiesPanel(bpy.types.Panel):
+    bl_label = "Text Properties"
+    bl_parent_id = "FONT3D_PT_panel"
+    bl_category = "Font3D"
+    bl_space_type = "VIEW_3D"
+    bl_region_type = "UI"
+
+    def get_active_text_properties(self):
+        if type(bpy.context.object) != type(None) and bpy.context.object.select_get():
+            for t in bpy.context.scene.font3d_data.available_texts:
+                if bpy.context.object == t.text_object:
+                    return t
+                if bpy.context.object.parent == t.text_object:
+                    return t
+        return None
+
+    @classmethod
+    def poll(self,context):
+        return type(self.get_active_text_properties(self)) != type(None)
+
+    def draw(self, context):
+        global shared
+        layout = self.layout
+        wm = context.window_manager
+        scene = context.scene
+        font3d = scene.font3d
+        font3d_data = scene.font3d_data
+
+        props = self.get_active_text_properties()
+
+        if type(props) == type(None):
+            layout.label(text="AAAAH")
+            return
+        
+        layout.label(text=f"Mom: {props.text_object.name}")
+        layout.row().prop(props, "letter_spacing")
 
 class FONT3D_OT_LoadFont(bpy.types.Operator):
     """Load Font 3D"""
@@ -244,6 +368,20 @@ class FONT3D_OT_LoadFont(bpy.types.Operator):
 
         return {'FINISHED'}
 
+class FONT3D_OT_TemporaryHelper(bpy.types.Operator):
+    """Temp Font 3D"""
+    bl_idname = "font3d.temporaryhelper"
+    bl_label = "Temp Font"
+    bl_options = {'REGISTER', 'UNDO'}
+
+    def execute(self, context):
+        global shared
+        scene = bpy.context.scene
+        font3d_data = scene.font3d_data
+
+        font3d_data.available_texts.clear()
+
+        return {'FINISHED'}
 
 class FONT3D_OT_TestFont(bpy.types.Operator):
     """Test Font 3D"""
@@ -257,9 +395,25 @@ class FONT3D_OT_TestFont(bpy.types.Operator):
 
         selected = bpy.context.view_layer.objects.active
 
+        font3d = scene.font3d
+        font3d_data = scene.font3d_data
+
+        if font3d.the_mother_of_typography:
+            selected = font3d.the_mother_of_typography
+
         if selected:
             font_name = "NM_Origin"
             font_face = "Tender"
+
+            # text_text_object = bpy.data.objects.new(f"{selected.name}_text", None)
+            # text_text_object.empty_display_type = 'PLAIN_AXES'
+            # selected.users_collection[0].objects.link(text_text_object)
+
+            distribution_type = 'DEFAULT'
+
+            bpy.ops.object.select_all(action='DESELECT')
+            t = font3d_data.available_texts.add()
+
             offset = mathutils.Vector((0.0, 0.0, 0.0))
             advance = 0
             for i, c in enumerate(scene.font3d.test_text):
@@ -269,18 +423,51 @@ class FONT3D_OT_TestFont(bpy.types.Operator):
                 if glyph == None:
                     self.report({'ERROR'}, f"Glyph not found for {font_name} {font_face} {glyph_id}")
                     continue
-                elif glyph.type == "CURVE":
-                    print("is curve")
-
-                glyph_advance = (-1 * glyph.bound_box[0][0] + glyph.bound_box[4][0]) * 0.01
-                offset.x = advance
 
                 ob = bpy.data.objects.new(f"{glyph_id}", glyph.data)
-                ob.location = selected.location + offset
-                ob.scale = (0.01, 0.01, 0.01)
+
+                if selected.type == "CURVE":
+                    distribution_type = "FOLLOW_PATH"
+                    curve_length = butils.get_curve_length(selected)
+
+                    ob.constraints.new(type='FOLLOW_PATH')
+                    ob.constraints["Follow Path"].target = selected
+                    ob.constraints["Follow Path"].use_fixed_location = True
+                    ob.constraints["Follow Path"].offset_factor = advance / curve_length
+                    ob.constraints["Follow Path"].use_curve_follow = True
+                    ob.constraints["Follow Path"].forward_axis = "FORWARD_X"
+                    ob.constraints["Follow Path"].up_axis = "UP_Y"
+                    # butils.ShowMessageBox("WHAT","INFO","I don't really know what you mean, lsaidry")
+                else:
+                    offset.x = advance
+                    ob.location = selected.location + offset
+
+                scalor = 0.001
+
+                glyph_advance = (-1 * glyph.bound_box[0][0] + glyph.bound_box[4][0]) * scalor
+
+                ob.scale = (scalor, scalor, scalor)
                 selected.users_collection[0].objects.link(ob)
-                ob.parent = selected
+
                 advance = advance + glyph_advance
+                tc = t.glyphs.add()
+                tc.glyph_id = c
+                tc.glyph_object = ob
+                tc.letter_spacing = 0
+
+                ob.select_set(True)
+
+            selected.select_set(True)
+            bpy.context.view_layer.objects.active = selected
+            bpy.ops.object.parent_set(type='OBJECT')
+            bpy.ops.object.select_all(action='DESELECT')
+
+            t.font_name = font_name
+            t.font_face = font_face
+            t.text_object = selected
+            t.text = scene.font3d.test_text
+            t.letter_spacing = 0.0
+            t.distribution_type = distribution_type
         else:
             butils.ShowMessageBox(
                     title="No object selected",
@@ -330,68 +517,95 @@ class FONT3D_OT_SaveFontToFile(bpy.types.Operator):
 
         fontcollection = bpy.data.collections.get("Font3D")
 
-        # needed to restore current state later
-        fontcollection_was_linked = False
-        previous_objects = []
-        fontcollection_objects = []
-
-        # hide fontcollection
+        # check if all is good to proceed
         if fontcollection is None:
             self.report({'INFO'}, f"{bl_info['name']}: There is no collection")
             return {'CANCELLED'}
-        elif scene.collection.children.find(fontcollection.name) > 0:
-            scene.collection.children.unlink(fontcollection)
-            fontcollection_was_linked = True
 
-        # collect and hide previous objects
-        for o in scene.objects:
-            previous_objects.append(o)
-            scene.collection.objects.unlink(o)
+        if font3d_data.active_font_index < 0:
+            self.report({'INFO'}, f"{bl_info['name']}: There is no active font")
+            return {'CANCELLED'}
 
-        # show fontcollection
-        # if scene.collection.children.find(fontcollection.name) < 0:
+        if len(font3d_data.available_fonts) <= font3d_data.active_font_index:
+            self.report({'INFO'}, f"{bl_info['name']}: Active font is not available")
+            return {'CANCELLED'}
+
+        # save state to restore later
+        was_fontcollection_linked = scene.collection.children.find(fontcollection.name) >= 0
+        was_selection = []
+        for obj in bpy.context.selected_objects:
+            was_selection.append(obj)
+        was_active_object = bpy.context.view_layer.objects.active
+
+        # create restore function
+        # def restore():
+            # bpy.ops.object.select_all(action="DESELECT")
+            # for obj in was_selection:
+                # obj.select_set(True)
+            # bpy.context.view_layer.objects.active = was_active_object
+            # if not was_fontcollection_linked:
+                # scene.collection.children.unlink(fontcollection)
+
+        # # show fontcollection
+        # if not was_fontcollection_linked:
             # scene.collection.children.link(fontcollection)
-        # link fontcollection
-        for o in fontcollection.objects:
-            fontcollection_objects.append(o)
-            fontcollection.objects.unlink(o)
-            scene.collection.objects.link(o)
+
+        bpy.ops.object.select_all(action="DESELECT")
 
         # get save data
         selected_font = font3d_data.available_fonts[font3d_data.active_font_index]
 
-        if selected_font == "":
-            butils.ShowMessageBox("Warning", 'ERROR', "no font selected")
-            return {'CANCELLED'}
-
         print(selected_font.font_name)
-        # save as gltf
-        bpy.ops.export_scene.gltf(
-            filepath="/home/jrkb/Downloads/toast/maker.gltf",
-            check_existing=False,
-            export_format='GLTF_SEPARATE',
-            export_extras=True,
-            export_hierarchy_full_collections=True,
-            use_active_collection_with_nested=True,
-        )
+        self.report({'INFO'}, f"{bl_info['name']}: {selected_font.font_name}")
+        preferences = getPreferences(context)
+        print(f"assets folder: {preferences.assets_dir}")
 
-        # restore from previous state
-        def restore():
-            for o in scene.objects:
-                scene.collection.objects.unlink(o)
+        bpy.ops.scene.new(type='FULL_COPY')
 
-            for o in previous_objects:
-                scene.collection.objects.link(o)
+        linked_collections = bpy.context.scene.collection.children.values()
+        for c in linked_collections:
+            bpy.context.scene.collection.children.unlink(c)
+        bpy.context.scene.collection.children.link(fontcollection)
 
-            for o in fontcollection_objects:
-                fontcollection.objects.link(o)
+        # select what needs to be selected
+        export_objects = []
+        for obj in fontcollection.objects:
+            if obj["font_name"] == selected_font.font_name:
+                obj.select_set(True)
+                export_objects.append(obj)
 
-            if fontcollection_was_linked:
-                scene.collection.children.link(fontcollection)
+        context_override = bpy.context.copy()
+        context_override["selected_objects"] = list(export_objects)
+        # context_override["scene"] = bpy.context.scene.copy()
+        with bpy.context.temp_override(**context_override):
+            # prepare variables before disable addons
+            filepath = f"/tmp/toast/{selected_font.font_name}.gltf"
+            del bpy.context.scene["font3d"]
+            del bpy.context.scene["font3d_data"]
+            del bpy.context.scene["curve_array_properties"]
+            del bpy.context.scene["curvetools"]
+            del bpy.context.scene["ObjectAlongPath_curveName"]
 
-        bpy.app.timers.register(restore, first_interval=5)
+            # save as gltf
+            lol = bpy.ops.export_scene.gltf(
+                filepath=filepath,
+                check_existing=False,
+                export_format='GLTF_SEPARATE',
+                export_extras=True,
+                # export_hierarchy_full_collections=True,
+                # use_active_collection_with_nested=True,
+                use_selection=True,
+                use_active_scene=True,
+            )
+            # bpy.app.timers.register(lambda: bpy.ops.scene.delete(), first_interval=5)
+
+            bpy.ops.scene.delete()
+        # restore()
 
         return {'FINISHED'}
+# keep = ['io_anim_bvh', 'io_curve_svg', 'io_mesh_stl', 'io_mesh_uv_layout', 'io_scene_fbx', 'io_scene_gltf2', 'io_scene_x3d', 'cycles', 'pose_library', 'font3d']
+# for addon in keep:
+    # bpy.ops.preferences.addon_enable(module=addon)
 
 
 class FONT3D_OT_CreateFontFromObjects(bpy.types.Operator):
@@ -434,11 +648,13 @@ class FONT3D_OT_CreateFontFromObjects(bpy.types.Operator):
                         glyph_id = Font.name_to_glyph_d[name]
 
                     if glyph_id != "unknown":
-                        bpy.data.objects[o.name]["glyph"] = glyph_id
+                        o["glyph"] = glyph_id
+                        o["font_name"] = font_name
+                        o["face_name"] = face_name
+                        # butils.apply_all_transforms(o)
                         butils.move_in_fontcollection(
                                 o,
-                                fontcollection,
-                                scene)
+                                fontcollection)
                         Font.add_glyph(
                                 font_name,
                                 face_name,
@@ -466,10 +682,15 @@ classes = (
             FONT3D_addonPreferences,
             FONT3D_OT_Font3D,
             FONT3D_available_font,
+            FONT3D_glyph_properties,
+            FONT3D_text_properties,
             FONT3D_data,
             FONT3D_settings,
             FONT3D_UL_fonts,
+            FONT3D_UL_texts,
             FONT3D_PT_panel,
+            FONT3D_PT_TextPropertiesPanel,
+            FONT3D_OT_TemporaryHelper,
             FONT3D_OT_TestFont,
             FONT3D_OT_LoadFont,
             FONT3D_OT_ToggleFont3DCollection,
@@ -482,18 +703,27 @@ def register():
         bpy.utils.register_class(cls)
     bpy.types.Scene.font3d = bpy.props.PointerProperty(type=FONT3D_settings)
     bpy.types.Scene.font3d_data = bpy.props.PointerProperty(type=FONT3D_data)
+    bpy.types.Object.__del__ = lambda self: print(f"Bye {self.name}")
     print(f"REGISTER {bl_info['name']}")
+    bpy.app.timers.register(execute_queued_functions)
 
     # would love to properly auto start this, but IT DOES NOT WORK
     # if load_handler not in bpy.app.handlers.load_post:
         # bpy.app.handlers.load_post.append(load_handler)
 
+    # clear available fonts
+    def clear_available_fonts():
+        bpy.context.scene.font3d_data.available_fonts.clear()
+
+    run_in_main_thread(clear_available_fonts)
+
 def unregister():
     # would love to properly auto start this, but IT DOES NOT WORK
     # if load_handler in bpy.app.handlers.load_post:
         # bpy.app.handlers.load_post.remove(load_handler)
     for cls in classes:
         bpy.utils.unregister_class(cls)
+    bpy.app.timers.unregister(execute_queued_functions)
 
     del bpy.types.Scene.font3d
     del bpy.types.Scene.font3d_data

butils.py

@@ -1,5 +1,20 @@
 import bpy
+import mathutils
+import importlib
 
+# then import dependencies for our addon
+if "Font" in locals():
+    importlib.reload(Font)
+else:
+    from .common import Font
+
+def apply_all_transforms(obj):
+    mb = obj.matrix_basis
+    if hasattr(obj.data, "transform"):
+        obj.data.transform(mb)
+    for c in obj.children:
+        c.matrix_local = mb @ c.matrix_local
+    obj.matrix_basis.identity()
 
 def get_parent_collection_names(collection, parent_names):
   for parent_collection in bpy.data.collections:
@@ -8,29 +23,127 @@ def get_parent_collection_names(collection, parent_names):
       get_parent_collection_names(parent_collection, parent_names)
       return
 
+# Ensure it's a curve object
+# TODO: no raising, please
+def get_curve_length(obj, num_samples = 100):
+    total_length = 0
+
+    if obj.type != 'CURVE':
+        raise TypeError("The selected object is not a curve")
+
+    curve = obj.data
+
+    # Loop through all splines in the curve
+    for spline in curve.splines:
+        total_length = total_length + spline.calc_length()
+    
+    return total_length
+
+# def get_objects_by_name(name, startswith="", endswith=""):
+    # return [obj for obj in bpy.context.scene.objects if obj.name.startswith(startswith) and if obj.name.endswith(endswith)]
+
+def find_objects_by_name(
+        objects,
+        equals="",
+        contains="",
+        startswith="",
+        endswith=""):
+    # handle equals
+    if equals != "":
+        index = objects.find(equals)
+        if index >= 0:
+            return [objects[index]]
+        return []
+    # handle others is more permissive
+    return [obj for obj in objects if obj.name.startswith(startswith) and obj.name.endswith(endswith) and obj.name.find(contains) >= 0]
+
+def find_objects_by_custom_property(
+        objects,
+        property_name="",
+        property_value=""):
+    return [obj for obj in objects if property_name in obj and obj[property_name] == property_value]
 
 def turn_collection_hierarchy_into_path(obj):
-  parent_collection = obj.users_collection[0]
-  parent_names      = []
-  parent_names.append(parent_collection.name)
-  get_parent_collection_names(parent_collection, parent_names)
-  parent_names.reverse()
-  return '\\'.join(parent_names)
+    parent_collection = obj.users_collection[0]
+    parent_names      = []
+    parent_names.append(parent_collection.name)
+    get_parent_collection_names(parent_collection, parent_names)
+    parent_names.reverse()
+    return '\\'.join(parent_names)
 
-def move_in_fontcollection(obj, fontcollection, scene):
+def find_font_object(fontcollection, font_name):
+    fonts = find_objects_by_custom_property(fontcollection.objects,
+                                            "is_font",
+                                            True)
+    for font in fonts:
+        if font["font_name"] == font_name and font.parent == None:
+            return font
+    return None
+
+def find_font_face_object(font_obj, face_name):
+    faces = find_objects_by_custom_property(font_obj.children,
+                                            "is_face",
+                                            True)
+    for face in faces:
+        if face["face_name"] == face_name:
+            return face
+    return None
+
+def move_in_fontcollection(obj, fontcollection):
     # print(turn_collection_hierarchy_into_path(obj))
-    if scene.collection.objects.find(obj.name) >= 0:
-        scene.collection.objects.unlink(obj)
+    # if scene.collection.objects.find(obj.name) >= 0:
+        # scene.collection.objects.unlink(obj)
+    for c in obj.users_collection:
+        c.objects.unlink(obj)
     if fontcollection.objects.find(obj.name) < 0:
         fontcollection.objects.link(obj)
-        # TODO: move in glyphs
-    # if fontcollection.objects.find("glyphs") < 0:
-        # empty = bpy.data.objects.new("glyphs", None)
-        # empty.empty_display_type = 'PLAIN_AXES'
-        # fontcollection.objects.link(empty)
-    # glyphs = fontcollection.objects.get("glyphs")
-    # if obj.parent != glyphs:
-        # obj.parent = glyphs
+
+    # parent nesting structure
+    # the font object
+    font_obj = find_font_object(fontcollection,
+                                obj["font_name"])
+    if font_obj == None:
+        font_obj = bpy.data.objects.new(obj["font_name"], None)
+        font_obj.empty_display_type = 'PLAIN_AXES'
+        fontcollection.objects.link(font_obj)
+
+    # ensure custom properties are set
+    font_obj["font_name"] = obj["font_name"]
+    font_obj["is_font"] = True
+
+    # the face object as a child of font object
+    face_obj = find_font_face_object(font_obj,
+                                     obj["face_name"])
+    if face_obj == None:
+        face_obj = bpy.data.objects.new(obj["face_name"], None)
+        face_obj.empty_display_type = 'PLAIN_AXES'
+        face_obj["is_face"] = True
+        fontcollection.objects.link(face_obj)
+    # ensure custom properties are set
+    face_obj["face_name"] = obj["face_name"]
+    face_obj["font_name"] = obj["font_name"]
+
+    if face_obj.parent != font_obj:
+        face_obj.parent = font_obj
+
+    # create glyphs if it does not exist
+    glyphs_objs = find_objects_by_name(face_obj.children, startswith="glyphs")
+    if len(glyphs_objs) <= 0:
+        glyphs_obj = bpy.data.objects.new("glyphs", None)
+        glyphs_obj.empty_display_type = 'PLAIN_AXES'
+        fontcollection.objects.link(glyphs_obj)
+        glyphs_obj.parent = face_obj
+    elif len(glyphs_objs) > 1:
+        print(f"found more glyphs objects than expected")
+
+    # now it must exist
+    glyphs_obj = find_objects_by_name(face_obj.children, startswith="glyphs")[0]
+    glyphs_obj["face_name"] = obj["face_name"]
+    glyphs_obj["font_name"] = obj["font_name"]
+
+    # and now parent it!
+    if obj.parent != glyphs_obj:
+        obj.parent = glyphs_obj
 
 def ShowMessageBox(title = "Message Box", icon = 'INFO', message=""):
 
@@ -66,3 +179,79 @@ def ShowMessageBox(title = "Message Box", icon = 'INFO', message=""):
             for n in myLines:
                 self.layout.label(text=n)
     bpy.context.window_manager.popup_menu(draw, title = title, icon = icon)
+
+def set_text_on_curve(text_properties):
+    mom = text_properties.text_object
+    if mom.type != "CURVE":
+        return False
+
+    glyph_objects = []
+    for g in text_properties.glyphs:
+        glyph_objects.append(g.glyph_object)
+
+    context_override = bpy.context.copy()
+    context_override["selected_objects"] = list(glyph_objects)
+    with bpy.context.temp_override(**context_override):
+        bpy.ops.object.delete()
+    # bpy.ops.object.delete({"selected_objects": glyph_objects})
+    text_properties.glyphs.clear()
+
+#TODO: fix selection with context_override
+    previous_selection = bpy.context.selected_objects
+    bpy.ops.object.select_all(action='DESELECT')
+    selected_objects = []
+
+    curve_length = get_curve_length(mom)
+    advance = 0
+    for i, c in enumerate(text_properties.text):
+        glyph_id = c
+        glyph = Font.get_glyph(text_properties.font_name,
+                               text_properties.font_face,
+                               glyph_id)
+
+        if glyph == None:
+            self.report({'ERROR'}, f"Glyph not found for {font_name} {font_face} {glyph_id}")
+            continue
+
+        ob = bpy.data.objects.new(f"{glyph_id}", glyph.data)
+
+        ob.constraints.new(type='FOLLOW_PATH')
+        ob.constraints["Follow Path"].target = mom
+        ob.constraints["Follow Path"].use_fixed_location = True
+        ob.constraints["Follow Path"].offset_factor = advance / curve_length
+        ob.constraints["Follow Path"].use_curve_follow = True
+        ob.constraints["Follow Path"].forward_axis = "FORWARD_X"
+        ob.constraints["Follow Path"].up_axis = "UP_Y"
+
+        scalor = 0.001
+
+        glyph_advance = (-1 * glyph.bound_box[0][0] + glyph.bound_box[4][0]) * scalor + text_properties.letter_spacing
+
+        ob.scale = (scalor, scalor, scalor)
+        mom.users_collection[0].objects.link(ob)
+
+        advance = advance + glyph_advance
+
+        glyph_data = text_properties.glyphs.add()
+        glyph_data.glyph_id = glyph_id
+        glyph_data.glyph_object = ob
+        glyph_data.letter_spacing = 0
+        ob.select_set(True)
+        # selected_objects.append(ob)
+    # selected_objects.append(mom)
+
+    mom.select_set(True)
+    bpy.context.view_layer.objects.active = mom
+    bpy.ops.object.parent_set(type='OBJECT')
+    # bpy.ops.object.select_all(action='DESELECT')
+    # for o in previous_selection:
+        # o.select_set(True)
+
+    # context_override = bpy.context.copy()
+    # context_override["selected_objects"] = selected_objects
+    # context_override["active_object"] = mom
+    # with bpy.context.temp_override(**context_override):
+        # bpy.ops.object.parent_set(type='OBJECT')
+
+
+    return True

common/Font.py

@@ -73,13 +73,13 @@ def add_glyph(font_name, face_name, glyph_id, glyph_object):
 
     if not fonts.keys().__contains__(font_name):
         fonts[font_name] = Font({})
-        print("is it has been added", fonts.keys())
+        # print("is it has been added", fonts.keys())
     if fonts[font_name].faces.get(face_name) == None:
         fonts[font_name].faces[face_name] = FontFace({})
-        print("is it has been added faces", fonts[font_name].faces[face_name])
+        # print("is it has been added faces", fonts[font_name].faces[face_name])
     if fonts[font_name].faces[face_name].glyphs.get(glyph_id) == None:
         fonts[font_name].faces[face_name].glyphs[glyph_id] = []
-        print("is it has been added glyph", fonts[font_name].faces[face_name].glyphs[glyph_id])
+        # print("is it has been added glyph", fonts[font_name].faces[face_name].glyphs[glyph_id])
     fonts[font_name].faces[face_name].glyphs.get(glyph_id).append(glyph_object)