hotkey problem in edit mode

Coding Beginning Blender Code and Development
1

Hi,

This is my first script:


bl_info = {"name": "Snap Origin Here",
           "category": "Object", }

import bpy  
  
class SnapOrigin(bpy.types.Operator):  
    bl_idname = "object.snap_origin"  
    bl_label = "Snap Origin Here"  
    bl_options = {'REGISTER', 'UNDO'}

    def execute(self, context):  
        current_area = bpy.context.area.type
        bpy.context.area.type = "VIEW_3D"
        bpy.ops.object.mode_set(mode="EDIT")
        bpy.ops.view3d.snap_cursor_to_selected()
        bpy.ops.object.mode_set(mode="OBJECT")
        bpy.ops.object.origin_set(type='ORIGIN_CURSOR')
        bpy.ops.object.mode_set(mode="EDIT")
        bpy.context.area.type = current_area
        return {'FINISHED'}  


addon_keymaps = []

def register():
    bpy.utils.register_class(SnapOrigin) 
# handle the keymap
    wm = bpy.context.window_manager
    km = wm.keyconfigs.addon.keymaps.new(name='Object Mode', space_type='EMPTY')

    kmi = km.keymap_items.new(SnapOrigin.bl_idname, 'BUTTON4MOUSE', 'PRESS')

    addon_keymaps.append(km)
 

def unregister():
    bpy.utils.unregister_class(SnapOrigin)
# handle the keymap
    wm = bpy.context.window_manager
    for km in addon_keymaps:
        wm.keyconfigs.addon.keymaps.remove(km)
    # clear the list
    addon_keymaps.clear()
    # clear the list
    del addon_keymaps[:]



if __name__ == "__main__":  
    register()

It snap the 3D Cursor on the selected vertex and Move Origin Point.

If I call it whit space > search > Snap Origin Here, it work, but if instead call it with BUTTON4MOUSE it work only in object mode and not in edit mode

What is my mistake?