LNXSDK/leenkx/blender/lnx/live_patch.py

import os
import shutil
import math
from typing import Any, Type

import bpy

import lnx.assets
from lnx import log, make
from lnx.exporter import LeenkxExporter
from lnx.logicnode.lnx_nodes import LnxLogicTreeNode
import lnx.make_state as state
import lnx.node_utils
import lnx.utils

if lnx.is_reload(__name__):
    lnx.assets = lnx.reload_module(lnx.assets)
    lnx.exporter = lnx.reload_module(lnx.exporter)
    from lnx.exporter import LeenkxExporter
    log = lnx.reload_module(log)
    lnx.logicnode.lnx_nodes = lnx.reload_module(lnx.logicnode.lnx_nodes)
    from lnx.logicnode.lnx_nodes import LnxLogicTreeNode
    make = lnx.reload_module(make)
    state = lnx.reload_module(state)
    lnx.node_utils = lnx.reload_module(lnx.node_utils)
    lnx.utils = lnx.reload_module(lnx.utils)
else:
    lnx.enable_reload(__name__)

    patch_id = 0
    """Current patch id"""

    __running = False
    """Whether live patch is currently active"""

    scene_cache = {}
    """Keys: (event_id, object_name) -> cached value tuple"""

# Any object can act as a message bus owner
msgbus_owner = object()


def start():
    """Start the live patch session."""
    log.debug("Live patch session started")

    listen(bpy.types.Object, "location", "obj_location")
    listen(bpy.types.Object, "rotation_euler", "obj_rotation")
    listen(bpy.types.Object, "scale", "obj_scale")

    # 'energy' is defined in sub classes only, also workaround for
    # https://developer.blender.org/T88408
    for light_type in (bpy.types.AreaLight, bpy.types.PointLight, bpy.types.SpotLight, bpy.types.SunLight):
        listen(light_type, "color", "light_color")
        listen(light_type, "energy", "light_energy")
        listen(light_type, "use_shadow", "light_shadow")
        listen(light_type, "lnx_clip_start", "light_near")
        listen(light_type, "lnx_clip_end", "light_far")
        listen(light_type, "lnx_fov", "light_fov")
        listen(light_type, "lnx_shadows_bias", "light_bias")

    listen(bpy.types.SpotLight, "spot_size", "light_spot_size")
    listen(bpy.types.SpotLight, "spot_blend", "light_spot_blend")
    listen(bpy.types.PointLight, "shadow_soft_size", "light_size")
    listen(bpy.types.SpotLight, "shadow_soft_size", "light_size")
    listen(bpy.types.AreaLight, "size", "light_area_size")
    listen(bpy.types.AreaLight, "size_y", "light_area_size")

    listen(bpy.types.Camera, "lens", "cam_props")
    listen(bpy.types.Camera, "sensor_width", "cam_props")
    listen(bpy.types.Camera, "clip_start", "cam_props")
    listen(bpy.types.Camera, "clip_end", "cam_props")
    listen(bpy.types.Camera, "lnx_frustum_culling", "cam_props")

    global __running
    __running = True


def stop():
    """Stop the live patch session."""
    global __running, patch_id
    if __running:
        __running = False
        patch_id = 0

        log.debug("Live patch session stopped")
        bpy.msgbus.clear_by_owner(msgbus_owner)


def get_obj_transforms(obj):
    loc = (round(obj.location.x, 6), round(obj.location.y, 6), round(obj.location.z, 6))
    rot = obj.rotation_euler.to_quaternion()
    rot = (round(rot.x, 6), round(rot.y, 6), round(rot.z, 6), round(rot.w, 6))
    scale = (round(obj.scale.x, 6), round(obj.scale.y, 6), round(obj.scale.z, 6))
    return loc, rot, scale


def get_light_props(obj):
    light = obj.data
    props = {
        'light_color': (round(light.color[0], 6), round(light.color[1], 6), round(light.color[2], 6)),
        'light_energy': round(light.energy, 6),
        'light_shadow': bool(light.use_shadow),
        'light_near': round(light.lnx_clip_start, 6),
        'light_far': round(light.lnx_clip_end, 6),
        'light_fov': round(light.lnx_fov, 6),
        'light_bias': round(light.lnx_shadows_bias * 0.0001, 6),
    }
    if light.type == 'SPOT':
        half_angle = light.spot_size * 0.5
        outer_cos = math.cos(half_angle)
        blend = max(0.0, min(1.0, light.spot_blend))
        inner_angle = math.atan(math.tan(half_angle) * (1.0 - blend))
        props['light_spot_size'] = round(outer_cos, 6)
        props['light_spot_blend'] = round(max(0.0001, math.cos(inner_angle) - outer_cos), 6)
    if light.type in ('POINT', 'SPOT'):
        props['light_size'] = round(light.shadow_soft_size * 10, 6)
    if light.type == 'AREA':
        props['light_area_size'] = (round(light.size, 6), round(light.size_y, 6))
    return props


def get_camera_props(obj):
    cam = obj.data
    return {
        'cam_props': (
            round(cam.lens, 6),
            round(cam.sensor_width, 6),
            round(cam.clip_start, 6),
            round(cam.clip_end, 6),
            bool(cam.lnx_frustum_culling),
        ),
    }


def get_world_clear_color():
    scene = bpy.context.scene
    if scene.world is None:
        return (0.051, 0.051, 0.051, 1.0), 1.0
    if scene.world.node_tree is None:
        c = scene.world.color
        return (round(c[0], 6), round(c[1], 6), round(c[2], 6), 1.0), 1.0
    if 'Background' in scene.world.node_tree.nodes:
        bg = scene.world.node_tree.nodes['Background']
        col = bg.inputs[0].default_value
        strength = bg.inputs[1].default_value
        r = max(min(col[0], 1.0), 0.0)
        g = max(min(col[1], 1.0), 0.0)
        b = max(min(col[2], 1.0), 0.0)
        a = max(min(col[3], 1.0), 0.0)
        return (round(r, 6), round(g, 6), round(b, 6), round(a, 6)), round(strength, 6)
    return (0.051, 0.051, 0.051, 1.0), 1.0

DEPSGRAPH_HANDLERS = {
    'is_updated_transform': [
        ('obj_location', lambda obj: get_obj_transforms(obj)[0]),
        ('obj_rotation', lambda obj: get_obj_transforms(obj)[1]),
        ('obj_scale', lambda obj: get_obj_transforms(obj)[2]),
    ],
}


def on_depsgraph_update(updates):
    if not __running:
        return False

    changed = False

    for update in updates:
        uid = update.id

        if isinstance(uid, bpy.types.Object):
            name = uid.name

            if update.is_updated_transform:
                for event_id, extractor in DEPSGRAPH_HANDLERS['is_updated_transform']:
                    current = extractor(uid)
                    cache_key = (event_id, name)
                    if cache_key not in scene_cache:
                        scene_cache[cache_key] = current
                    elif current != scene_cache[cache_key]:
                        scene_cache[cache_key] = current
                        send_event(event_id, name)
                        changed = True

            if update.is_updated_shading and isinstance(uid.data, bpy.types.Light):
                for event_id, current in get_light_props(uid).items():
                    cache_key = (event_id, uid.data.name)
                    if cache_key not in scene_cache:
                        scene_cache[cache_key] = current
                    elif current != scene_cache[cache_key]:
                        scene_cache[cache_key] = current
                        send_event(event_id, name)
                        changed = True

            if update.is_updated_shading and isinstance(uid.data, bpy.types.Camera):
                for event_id, current in get_camera_props(uid).items():
                    cache_key = (event_id, uid.data.name)
                    if cache_key not in scene_cache:
                        scene_cache[cache_key] = current
                    elif current != scene_cache[cache_key]:
                        scene_cache[cache_key] = current
                        send_event(event_id, name)
                        changed = True

        elif isinstance(uid, bpy.types.Scene):
            for obj in bpy.data.objects:
                visibility_key = ('obj_visibility', obj.name)
                current = not obj.hide_get()
                if visibility_key not in scene_cache:
                    scene_cache[visibility_key] = current
                elif current != scene_cache[visibility_key]:
                    scene_cache[visibility_key] = current
                    send_event('obj_visibility', obj.name)
                    changed = True

        elif isinstance(uid, bpy.types.World):
            clear_color_key = ('world_clear_color', uid.name)
            current = get_world_clear_color()
            if clear_color_key not in scene_cache:
                scene_cache[clear_color_key] = current
            elif current != scene_cache[clear_color_key]:
                scene_cache[clear_color_key] = current
                send_event('world_clear_color')
                changed = True

    return changed


def patch_export():
    """Re-export the current scene and update the game accordingly."""
    if not __running or state.proc_build is not None:
        return

    lnx.assets.invalidate_enabled = False

    with lnx.utils.WorkingDir(lnx.utils.get_fp()):
        asset_path = lnx.utils.get_fp_build() + '/compiled/Assets/' + lnx.utils.safestr(bpy.context.scene.name) + '.lnx'
        LeenkxExporter.export_scene(bpy.context, asset_path, scene=bpy.context.scene)

        dir_std_shaders_dst = os.path.join(lnx.utils.build_dir(), 'compiled', 'Shaders', 'std')
        if not os.path.isdir(dir_std_shaders_dst):
            dir_std_shaders_src = os.path.join(lnx.utils.get_sdk_path(), 'leenkx', 'Shaders', 'std')
            shutil.copytree(dir_std_shaders_src, dir_std_shaders_dst)

        node_path = lnx.utils.get_node_path()
        khamake_path = lnx.utils.get_khamake_path()
        cmd = [
            node_path, khamake_path, 'krom',
            '--shaderversion', '330',
            '--parallelAssetConversion', '4',
            '--to', lnx.utils.build_dir() + '/debug',
            '--nohaxe',
            '--noproject'
        ]

        lnx.assets.invalidate_enabled = True
        state.proc_build = make.run_proc(cmd, patch_done)


def patch_done():
    """Signal Iron to reload the running scene after a re-export."""
    js = 'iron.Scene.patch();'
    write_patch(js)
    state.proc_build = None


def write_patch(js: str):
    """Write the given javascript code to 'krom.patch'."""
    global patch_id
    with open(lnx.utils.get_fp_build() + '/debug/krom/krom.patch', 'w', encoding='utf-8') as f:
        patch_id += 1
        f.write(str(patch_id) + '\n')
        f.write(js)


def listen(rna_type: Type[bpy.types.bpy_struct], prop: str, event_id: str):
    """Subscribe to '<rna_type>.<prop>'. The event_id can be choosen
    freely but must match with the id used in send_event().
    """
    bpy.msgbus.subscribe_rna(
        key=(rna_type, prop),
        owner=msgbus_owner,
        args=(event_id, ),
        notify=send_event
        # options={"PERSISTENT"}
    )


def send_event(event_id: str, opt_data: Any = None):
    """Send the result of the given event to Krom."""
    if not __running:
        return

    obj_name = opt_data if isinstance(opt_data, str) else None
    if obj_name is not None:
        obj_data = bpy.data.objects.get(obj_name)
    elif hasattr(bpy.context, 'object') and bpy.context.object is not None:
        obj_data = bpy.context.object
        obj_name = obj_data.name
    else:
        obj_data = None

    if obj_data is not None and obj_data.mode == "OBJECT":
        if event_id == "obj_location":
            vec = obj_data.location
            js = f'var o = iron.Scene.active.getChild("{obj_name}"); if (o) {{ o.transform.loc.set({vec[0]}, {vec[1]}, {vec[2]}); o.transform.dirty = true; }}'
            write_patch(js)

        elif event_id == 'obj_scale':
            vec = obj_data.scale
            js = f'var o = iron.Scene.active.getChild("{obj_name}"); if (o) {{ o.transform.scale.set({vec[0]}, {vec[1]}, {vec[2]}); o.transform.dirty = true; }}'
            write_patch(js)

        elif event_id == 'obj_rotation':
            vec = obj_data.rotation_euler.to_quaternion()
            js = f'var o = iron.Scene.active.getChild("{obj_name}"); if (o) {{ o.transform.rot.set({vec[1]}, {vec[2]}, {vec[3]}, {vec[0]}); o.transform.dirty = true; }}'
            write_patch(js)

        elif event_id == 'light_color':
            light: bpy.types.Light = obj_data.data
            vec = light.color
            js = f'var lRaw = iron.Scene.active.getLight("{light.name}").data.raw; lRaw.color[0]={vec[0]}; lRaw.color[1]={vec[1]}; lRaw.color[2]={vec[2]};'
            write_patch(js)

        elif event_id == 'light_energy':
            light: bpy.types.Light = obj_data.data
            # Align strength to Leenkx, see exporter.export_light()
            # TODO: Use exporter.export_light() and simply reload all raw light data in Iron?
            strength_fac = 1.0
            if light.type == 'SUN':
                strength_fac = 0.325
            elif light.type in ('POINT', 'SPOT', 'AREA'):
                strength_fac = 0.01
            js = f'var lRaw = iron.Scene.active.getLight("{light.name}").data.raw; lRaw.strength={light.energy * strength_fac};'
            write_patch(js)

        elif event_id == 'light_shadow':
            light: bpy.types.Light = obj_data.data
            js = f'var lRaw = iron.Scene.active.getLight("{light.name}").data.raw; lRaw.cast_shadow={"true" if light.use_shadow else "false"};'
            write_patch(js)

        elif event_id == 'light_near':
            light: bpy.types.Light = obj_data.data
            js = f'var lRaw = iron.Scene.active.getLight("{light.name}").data.raw; lRaw.near_plane={light.lnx_clip_start};'
            write_patch(js)

        elif event_id == 'light_far':
            light: bpy.types.Light = obj_data.data
            js = f'var lRaw = iron.Scene.active.getLight("{light.name}").data.raw; lRaw.far_plane={light.lnx_clip_end};'
            write_patch(js)

        elif event_id == 'light_fov':
            light: bpy.types.Light = obj_data.data
            js = f'var lRaw = iron.Scene.active.getLight("{light.name}").data.raw; lRaw.fov={light.lnx_fov};'
            write_patch(js)

        elif event_id == 'light_bias':
            light: bpy.types.Light = obj_data.data
            js = f'var lRaw = iron.Scene.active.getLight("{light.name}").data.raw; lRaw.shadows_bias={light.lnx_shadows_bias * 0.0001};'
            write_patch(js)

        elif event_id == 'light_spot_size':
            light: bpy.types.Light = obj_data.data
            half_angle = light.spot_size * 0.5
            outer_cos = math.cos(half_angle)
            js = f'var lRaw = iron.Scene.active.getLight("{light.name}").data.raw; lRaw.spot_size={outer_cos};'
            write_patch(js)

        elif event_id == 'light_spot_blend':
            light: bpy.types.Light = obj_data.data
            half_angle = light.spot_size * 0.5
            outer_cos = math.cos(half_angle)
            blend = max(0.0, min(1.0, light.spot_blend))
            inner_angle = math.atan(math.tan(half_angle) * (1.0 - blend))
            spot_blend = max(0.0001, math.cos(inner_angle) - outer_cos)
            js = f'var lRaw = iron.Scene.active.getLight("{light.name}").data.raw; lRaw.spot_blend={spot_blend};'
            write_patch(js)

        elif event_id == 'light_size':
            light: bpy.types.Light = obj_data.data
            js = f'var lRaw = iron.Scene.active.getLight("{light.name}").data.raw; lRaw.light_size={light.shadow_soft_size * 10};'
            write_patch(js)

        elif event_id == 'light_area_size':
            light: bpy.types.Light = obj_data.data
            js = f'var lRaw = iron.Scene.active.getLight("{light.name}").data.raw; lRaw.size={light.size}; lRaw.size_y={light.size_y};'
            write_patch(js)

        elif event_id == 'cam_props':
            cam: bpy.types.Camera = obj_data.data
            render = bpy.context.scene.render
            projection = obj_data.calc_matrix_camera(
                bpy.context.evaluated_depsgraph_get(),
                x=render.resolution_x,
                y=render.resolution_y,
                scale_x=render.pixel_aspect_x,
                scale_y=render.pixel_aspect_y)
            focal_y = projection[1][1]
            depth_z = projection[2][2]
            depth_w = projection[2][3]
            far_near_ratio = (depth_z - 1.0) / (depth_z + 1.0)
            fov = 2.0 * math.atan(1.0 / focal_y)
            near = (depth_w * (1.0 - far_near_ratio)) / (2.0 * far_near_ratio)
            far = far_near_ratio * near
            cam_obj = f'iron.Scene.active.getCamera("{cam.name}")'
            js = f'var c = {cam_obj}; var cRaw = c.data.raw; cRaw.fov={fov}; cRaw.near_plane={near}; cRaw.far_plane={far}; cRaw.frustum_culling={"true" if cam.lnx_frustum_culling else "false"}; c.buildProjection();'
            write_patch(js)

        elif event_id == 'obj_visibility':
            visible = not obj_data.hide_get()
            js = f'var o = iron.Scene.active.getChild("{obj_name}"); if (o) o.visible = {"true" if visible else "false"};'
            write_patch(js)

    elif obj_data is not None:
        patch_export()

    if event_id == 'world_clear_color':
        color, strength = get_world_clear_color()
        bg_int = (int(color[3] * 255) << 24) + (int(color[0] * 255) << 16) + (int(color[1] * 255) << 8) + int(color[2] * 255)
        js = f'var w = iron.Scene.active.world; if (w) {{ w.raw.background_color={bg_int}; if (w.probe) w.probe.raw.strength={strength}; }}'
        write_patch(js)

    if event_id == 'ln_insert_link':
        node: LnxLogicTreeNode
        link: bpy.types.NodeLink
        node, link = opt_data

        # This event is called twice for a connection but we only need
        # send it once
        if node == link.from_node:
            tree_name = lnx.node_utils.get_export_tree_name(node.get_tree())

            # [1:] is used here because make_logic already uses that for
            # node names if lnx_debug is used
            from_node_name = lnx.node_utils.get_export_node_name(node)[1:]
            to_node_name = lnx.node_utils.get_export_node_name(link.to_node)[1:]

            from_index = lnx.node_utils.get_socket_index(node.outputs, link.from_socket)
            to_index = lnx.node_utils.get_socket_index(link.to_node.inputs, link.to_socket)

            js = f'LivePatch.patchCreateNodeLink("{tree_name}", "{from_node_name}", "{to_node_name}", "{from_index}", "{to_index}");'
            write_patch(js)

    elif event_id == 'ln_update_prop':
        node: LnxLogicTreeNode
        prop_name: str
        node, prop_name = opt_data

        tree_name = lnx.node_utils.get_export_tree_name(node.get_tree())
        node_name = lnx.node_utils.get_export_node_name(node)[1:]

        value = lnx.node_utils.haxe_format_prop_value(node, prop_name)

        if prop_name.endswith('_get'):
            # Hack because some nodes use a different Python property
            # name than they use in Haxe
            prop_name = prop_name[:-4]

        js = f'LivePatch.patchUpdateNodeProp("{tree_name}", "{node_name}", "{prop_name}", {value});'
        write_patch(js)

    elif event_id == 'ln_socket_val':
        node: LnxLogicTreeNode
        socket: bpy.types.NodeSocket
        node, socket = opt_data

        socket_index = lnx.node_utils.get_socket_index(node.inputs, socket)

        if socket_index != -1:
            tree_name = lnx.node_utils.get_export_tree_name(node.get_tree())
            node_name = lnx.node_utils.get_export_node_name(node)[1:]

            value = socket.get_default_value()
            inp_type = socket.lnx_socket_type

            if inp_type in ('VECTOR', 'RGB'):
                value = f'new iron.Vec4({lnx.node_utils.haxe_format_socket_val(value, array_outer_brackets=False)}, 1.0)'
            elif inp_type == 'RGBA':
                value = f'new iron.Vec4({lnx.node_utils.haxe_format_socket_val(value, array_outer_brackets=False)})'
            elif inp_type == 'ROTATION':
                value = f'new iron.Quat({lnx.node_utils.haxe_format_socket_val(value, array_outer_brackets=False)})'
            elif inp_type == 'OBJECT':
                value = f'iron.Scene.active.getChild("{value}")' if value != '' else 'null'
            else:
                value = lnx.node_utils.haxe_format_socket_val(value)

            js = f'LivePatch.patchUpdateNodeInputVal("{tree_name}", "{node_name}", {socket_index}, {value});'
            write_patch(js)

    elif event_id == 'ln_create':
        node: LnxLogicTreeNode = opt_data

        tree_name = lnx.node_utils.get_export_tree_name(node.get_tree())
        node_name = lnx.node_utils.get_export_node_name(node)[1:]
        node_type = 'leenkx.logicnode.' + node.bl_idname[2:]

        prop_names = list(lnx.node_utils.get_haxe_property_names(node))
        prop_py_names, prop_hx_names = zip(*prop_names) if len(prop_names) > 0 else ([], [])
        prop_values = (getattr(node, prop_name) for prop_name in prop_py_names)
        prop_datas = lnx.node_utils.haxe_format_socket_val(list(zip(prop_hx_names, prop_values)))

        inp_data = [(inp.lnx_socket_type, inp.get_default_value()) for inp in node.inputs]
        inp_data = lnx.node_utils.haxe_format_socket_val(inp_data)
        out_data = [(out.lnx_socket_type, out.get_default_value()) for out in node.outputs]
        out_data = lnx.node_utils.haxe_format_socket_val(out_data)

        js = f'LivePatch.patchNodeCreate("{tree_name}", "{node_name}", "{node_type}", {prop_datas}, {inp_data}, {out_data});'
        write_patch(js)

    elif event_id == 'ln_delete':
        node: LnxLogicTreeNode = opt_data

        tree_name = lnx.node_utils.get_export_tree_name(node.get_tree())
        node_name = lnx.node_utils.get_export_node_name(node)[1:]

        js = f'LivePatch.patchNodeDelete("{tree_name}", "{node_name}");'
        write_patch(js)

    elif event_id == 'ln_copy':
        newnode: LnxLogicTreeNode
        node: LnxLogicTreeNode
        newnode, node = opt_data

        # Use newnode to get the tree, node has no id_data at this moment
        tree_name = lnx.node_utils.get_export_tree_name(newnode.get_tree())

        newnode_name = lnx.node_utils.get_export_node_name(newnode)[1:]
        node_name = lnx.node_utils.get_export_node_name(node)[1:]

        props_list = '[' + ','.join(f'"{p}"' for _, p in lnx.node_utils.get_haxe_property_names(node)) + ']'

        inp_data = [(inp.lnx_socket_type, inp.get_default_value()) for inp in newnode.inputs]
        inp_data = lnx.node_utils.haxe_format_socket_val(inp_data)
        out_data = [(out.lnx_socket_type, out.get_default_value()) for out in newnode.outputs]
        out_data = lnx.node_utils.haxe_format_socket_val(out_data)

        js = f'LivePatch.patchNodeCopy("{tree_name}", "{node_name}", "{newnode_name}", {props_list}, {inp_data}, {out_data});'
        write_patch(js)

    elif event_id == 'ln_update_sockets':
        node: LnxLogicTreeNode = opt_data

        tree_name = lnx.node_utils.get_export_tree_name(node.get_tree())
        node_name = lnx.node_utils.get_export_node_name(node)[1:]

        inp_data = '['
        for idx, inp in enumerate(node.inputs):
            inp_data += '{'
            # is_linked can be true even if there are no links if the
            # user starts dragging a connection away before releasing
            # the mouse
            if inp.is_linked and len(inp.links) > 0:
                inp_data += 'isLinked: true,'
                inp_data += f'fromNode: "{lnx.node_utils.get_export_node_name(inp.links[0].from_node)[1:]}",'
                inp_data += f'fromIndex: {lnx.node_utils.get_socket_index(inp.links[0].from_node.outputs, inp.links[0].from_socket)},'
            else:
                inp_data += 'isLinked: false,'
                inp_data += f'socketType: "{inp.lnx_socket_type}",'
                inp_data += f'socketValue: {lnx.node_utils.haxe_format_socket_val(inp.get_default_value())},'

            inp_data += f'toIndex: {idx}'
            inp_data += '},'
        inp_data += ']'

        out_data = '['
        for idx, out in enumerate(node.outputs):
            out_data += '['
            for link in out.links:
                out_data += '{'
                if out.is_linked:
                    out_data += 'isLinked: true,'
                    out_data += f'toNode: "{lnx.node_utils.get_export_node_name(link.to_node)[1:]}",'
                    out_data += f'toIndex: {lnx.node_utils.get_socket_index(link.to_node.inputs, link.to_socket)},'
                else:
                    out_data += 'isLinked: false,'
                    out_data += f'socketType: "{out.lnx_socket_type}",'
                    out_data += f'socketValue: {lnx.node_utils.haxe_format_socket_val(out.get_default_value())},'

                out_data += f'fromIndex: {idx}'
                out_data += '},'
            out_data += '],'
        out_data += ']'

        js = f'LivePatch.patchSetNodeLinks("{tree_name}", "{node_name}", {inp_data}, {out_data});'
        write_patch(js)


def on_operator(operator_id: str):
    """As long as bpy.msgbus doesn't listen to changes made by
    operators (*), additionally notify the callback manually.

    (*) https://developer.blender.org/T72109
    """
    if not __running:
        return

    if operator_id in IGNORE_OPERATORS:
        return

    if operator_id == 'TRANSFORM_OT_translate':
        send_event('obj_location')
    elif operator_id in ('TRANSFORM_OT_rotate', 'TRANSFORM_OT_trackball'):
        send_event('obj_rotation')
    elif operator_id == 'TRANSFORM_OT_resize':
        send_event('obj_scale')
    elif operator_id in ('OBJECT_OT_hide_view_set', 'OBJECT_OT_hide_view_clear', 'OBJECT_OT_visible_all', 'OUTLINER_OT_hide'):
        visible = operator_id != 'OBJECT_OT_hide_view_set'
        if hasattr(bpy.context, 'object') and bpy.context.object is not None:
            obj_name = bpy.context.object.name
            js = f'var o = iron.Scene.active.getChild("{obj_name}"); if (o) o.visible = {"true" if visible else "false"};'
            write_patch(js)

    # Rebuild
    else:
        patch_export()


# Don't re-export the scene for the following operators
IGNORE_OPERATORS = (
    'LNX_OT_node_add_input',
    'LNX_OT_node_add_input_output',
    'LNX_OT_node_add_input_value',
    'LNX_OT_node_add_output',
    'LNX_OT_node_call_func',
    'LNX_OT_node_remove_input',
    'LNX_OT_node_remove_input_output',
    'LNX_OT_node_remove_input_value',
    'LNX_OT_node_remove_output',
    'LNX_OT_node_search',

    'NODE_OT_delete',
    'NODE_OT_duplicate_move',
    'NODE_OT_hide_toggle',
    'NODE_OT_link',
    'NODE_OT_move_detach_links',
    'NODE_OT_select',
    'NODE_OT_translate_attach',
    'NODE_OT_translate_attach_remove_on_cancel',

    'OBJECT_OT_editmode_toggle',
    'OUTLINER_OT_item_activate',
    'UI_OT_button_string_clear',
    'UI_OT_eyedropper_id',
    'VIEW3D_OT_select',
    'VIEW3D_OT_select_box',
)