text: # ##### BEGIN GPL LICENSE BLOCK #####
  #
  #  This program is free software; you can redistribute it and/or
  #  modify it under the terms of the GNU General Public License
  #  as published by the Free Software Foundation; either version 2
  #  of the License, or (at your option) any later version.
  #
  #  This program is distributed in the hope that it will be useful,
  #  but WITHOUT ANY WARRANTY; without even the implied warranty of
  #  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  #  GNU General Public License for more details.
  #
  #  You should have received a copy of the GNU General Public License
  #  along with this program; if not, write to the Free Software Foundation,
  #  Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  #
  # ##### END GPL LICENSE BLOCK #####
  
  # <pep8 compliant>
  from bpy.types import Header, Panel, Menu, UIList
  
  
  class FILEBROWSER_HT_header(Header):
      bl_space_type = 'FILE_BROWSER'
  
      def draw(self, context):
          layout = self.layout
  
          st = context.space_data
  
          if st.active_operator is None:
              layout.template_header()
  
          layout.menu("FILEBROWSER_MT_view")
          layout.menu("FILEBROWSER_MT_select")
  
          # can be None when save/reload with a file selector open
  
          layout.separator_spacer()
  
          layout.template_running_jobs()
  
  
  class FILEBROWSER_PT_display(Panel):
      bl_space_type = 'FILE_BROWSER'
      bl_region_type = 'HEADER'
      bl_label = "Display"
  
      @classmethod
      def poll(cls, context):
          # can be None when save/reload with a file selector open
          return context.space_data.params is not None
  
      def draw(self, context):
          layout = self.layout
  
          space = context.space_data
          params = space.params
  
          layout.label(text="Display as")
          layout.column().prop(params, "display_type", expand=True)
  
          layout.use_property_split = True
          layout.use_property_decorate = False  # No animation.
  
          if params.display_type == 'THUMBNAIL':
              layout.prop(params, "display_size", text="Size")
          else:
              layout.prop(params, "show_details_size", text="Size")
              layout.prop(params, "show_details_datetime", text="Date")
  
          layout.prop(params, "recursion_level", text="Recursions")
  
          layout.use_property_split = False
          layout.separator()
  
          layout.label(text="Sort by")
          layout.column().prop(params, "sort_method", expand=True)
          layout.prop(params, "use_sort_invert")
  
  
  class FILEBROWSER_PT_filter(Panel):
      bl_space_type = 'FILE_BROWSER'
      bl_region_type = 'HEADER'
      bl_label = "Filter"
  
      @classmethod
      def poll(cls, context):
          # can be None when save/reload with a file selector open
          return context.space_data.params is not None
  
      def draw(self, context):
          layout = self.layout
  
          space = context.space_data
          params = space.params
          is_lib_browser = params.use_library_browsing
  
          row = layout.row(align=True)
          row.prop(params, "use_filter", text="", toggle=0)
          row.label(text="Filter")
  
          col = layout.column()
          col.active = params.use_filter
  
          row = col.row()
          row.label(icon='FILE_FOLDER')
          row.prop(params, "use_filter_folder", text="Folders", toggle=0)
  
          if params.filter_glob:
              col.label(text=params.filter_glob)
          else:
              row = col.row()
              row.label(icon='FILE_BLEND')
              row.prop(params, "use_filter_blender",
                       text=".blend Files", toggle=0)
              row = col.row()
              row.label(icon='FILE_BACKUP')
              row.prop(params, "use_filter_backup",
                       text="Backup .blend Files", toggle=0)
              row = col.row()
              row.label(icon='FILE_IMAGE')
              row.prop(params, "use_filter_image", text="Image Files", toggle=0)
              row = col.row()
              row.label(icon='FILE_MOVIE')
              row.prop(params, "use_filter_movie", text="Movie Files", toggle=0)
              row = col.row()
              row.label(icon='FILE_SCRIPT')
              row.prop(params, "use_filter_script",
                       text="Script Files", toggle=0)
              row = col.row()
              row.label(icon='FILE_FONT')
              row.prop(params, "use_filter_font", text="Font Files", toggle=0)
              row = col.row()
              row.label(icon='FILE_SOUND')
              row.prop(params, "use_filter_sound", text="Sound Files", toggle=0)
              row = col.row()
              row.label(icon='FILE_TEXT')
              row.prop(params, "use_filter_text", text="Text Files", toggle=0)
              row = col.row()
              row.label(icon='FILE_VOLUME')
              row.prop(params, "use_filter_volume", text="Volume Files", toggle=0)
  
          col.separator()
  
          if is_lib_browser:
              row = col.row()
              row.label(icon='BLANK1')  # Indentation
              row.prop(params, "use_filter_blendid",
                       text="Blender IDs", toggle=0)
              if params.use_filter_blendid:
                  row = col.row()
                  row.label(icon='BLANK1')  # Indentation
  
                  sub = row.column(align=True)
                  filter_id = params.filter_id
                  for identifier in dir(filter_id):
                      if identifier.startswith("category_"):
                          sub.prop(filter_id, identifier, toggle=True)
  
                  col.separator()
  
          layout.prop(params, "show_hidden")
  
  
  def panel_poll_is_upper_region(region):
      # The upper region is left-aligned, the lower is split into it then.
      # Note that after "Flip Regions" it's right-aligned.
      return region.alignment in {'LEFT', 'RIGHT'}
  
  
  class FILEBROWSER_UL_dir(UIList):
      def draw_item(self, _context, layout, _data, item, icon, _active_data, _active_propname, _index):
          direntry = item
          # space = context.space_data
  
          if self.layout_type in {'DEFAULT', 'COMPACT'}:
              row = layout.row(align=True)
              row.enabled = direntry.is_valid
              # Non-editable entries would show grayed-out, which is bad in this specific case, so switch to mere label.
              if direntry.is_property_readonly("name"):
                  row.label(text=direntry.name, icon_value=icon)
              else:
                  row.prop(direntry, "name", text="", emboss=False, icon_value=icon)
  
          elif self.layout_type == 'GRID':
              layout.alignment = 'CENTER'
              layout.prop(direntry, "path", text="")
  
  
  class FILEBROWSER_PT_bookmarks_volumes(Panel):
      bl_space_type = 'FILE_BROWSER'
      bl_region_type = 'TOOLS'
      bl_category = "Bookmarks"
      bl_label = "Volumes"
  
      @classmethod
      def poll(cls, context):
          return panel_poll_is_upper_region(context.region)
  
      def draw(self, context):
          layout = self.layout
          space = context.space_data
  
          if space.system_folders:
              row = layout.row()
              row.template_list("FILEBROWSER_UL_dir", "system_folders", space, "system_folders",
                                space, "system_folders_active", item_dyntip_propname="path", rows=1, maxrows=10)
  
  
  class FILEBROWSER_PT_bookmarks_system(Panel):
      bl_space_type = 'FILE_BROWSER'
      bl_region_type = 'TOOLS'
      bl_category = "Bookmarks"
      bl_label = "System"
  
      @classmethod
      def poll(cls, context):
          return not context.preferences.filepaths.hide_system_bookmarks and panel_poll_is_upper_region(context.region)
  
      def draw(self, context):
          layout = self.layout
          space = context.space_data
  
          if space.system_bookmarks:
              row = layout.row()
              row.template_list("FILEBROWSER_UL_dir", "system_bookmarks", space, "system_bookmarks",
                                space, "system_bookmarks_active", item_dyntip_propname="path", rows=1, maxrows=10)
  
  
  class FILEBROWSER_MT_bookmarks_context_menu(Menu):
      bl_label = "Bookmarks Specials"
  
      def draw(self, _context):
          layout = self.layout
          layout.operator("file.bookmark_cleanup", icon='X', text="Cleanup")
  
          layout.separator()
          layout.operator("file.bookmark_move", icon='TRIA_UP_BAR',
                          text="Move to Top").direction = 'TOP'
          layout.operator("file.bookmark_move", icon='TRIA_DOWN_BAR',
                          text="Move to Bottom").direction = 'BOTTOM'
  
  
  class FILEBROWSER_PT_bookmarks_favorites(Panel):
      bl_space_type = 'FILE_BROWSER'
      bl_region_type = 'TOOLS'
      bl_category = "Bookmarks"
      bl_label = "Favorites"
  
      @classmethod
      def poll(cls, context):
          return panel_poll_is_upper_region(context.region)
  
      def draw(self, context):
          layout = self.layout
          space = context.space_data
  
          if space.bookmarks:
              row = layout.row()
              num_rows = len(space.bookmarks)
              row.template_list("FILEBROWSER_UL_dir", "bookmarks", space, "bookmarks",
                                space, "bookmarks_active", item_dyntip_propname="path",
                                rows=(2 if num_rows < 2 else 4), maxrows=10)
  
              col = row.column(align=True)
              col.operator("file.bookmark_add", icon='ADD', text="")
              col.operator("file.bookmark_delete", icon='REMOVE', text="")
              col.menu("FILEBROWSER_MT_bookmarks_context_menu",
                       icon='DOWNARROW_HLT', text="")
  
              if num_rows > 1:
                  col.separator()
                  col.operator("file.bookmark_move", icon='TRIA_UP',
                               text="").direction = 'UP'
                  col.operator("file.bookmark_move", icon='TRIA_DOWN',
                               text="").direction = 'DOWN'
          else:
              layout.operator("file.bookmark_add", icon='ADD')
  
  
  class FILEBROWSER_PT_bookmarks_recents(Panel):
      bl_space_type = 'FILE_BROWSER'
      bl_region_type = 'TOOLS'
      bl_category = "Bookmarks"
      bl_label = "Recent"
  
      @classmethod
      def poll(cls, context):
          return not context.preferences.filepaths.hide_recent_locations and panel_poll_is_upper_region(context.region)
  
      def draw(self, context):
          layout = self.layout
          space = context.space_data
  
          if space.recent_folders:
              row = layout.row()
              row.template_list("FILEBROWSER_UL_dir", "recent_folders", space, "recent_folders",
                                space, "recent_folders_active", item_dyntip_propname="path", rows=1, maxrows=10)
  
              col = row.column(align=True)
              col.operator("file.reset_recent", icon='X', text="")
  
  
  class FILEBROWSER_PT_advanced_filter(Panel):
      bl_space_type = 'FILE_BROWSER'
      bl_region_type = 'TOOLS'
      bl_category = "Filter"
      bl_label = "Advanced Filter"
  
      @classmethod
      def poll(cls, context):
          # only useful in append/link (library) context currently...
          return context.space_data.params.use_library_browsing and panel_poll_is_upper_region(context.region)
  
      def draw(self, context):
          layout = self.layout
          space = context.space_data
          params = space.params
  
          if params and params.use_library_browsing:
              layout.prop(params, "use_filter_blendid")
              if params.use_filter_blendid:
                  layout.separator()
                  col = layout.column(align=True)
                  filter_id = params.filter_id
                  for identifier in dir(filter_id):
                      if identifier.startswith("filter_"):
                          col.prop(filter_id, identifier, toggle=True)
  
  
  class FILEBROWSER_PT_directory_path(Panel):
      bl_space_type = 'FILE_BROWSER'
      bl_region_type = 'UI'
      bl_label = "Directory Path"
      bl_category = "Attributes"
      bl_options = {'HIDE_HEADER'}
  
      def is_header_visible(self, context):
          for region in context.area.regions:
              if region.type == 'HEADER' and region.height <= 1:
                  return False
  
          return True
  
      def is_option_region_visible(self, context, space):
          if not space.active_operator:
              return False
  
          for region in context.area.regions:
              if region.type == 'TOOL_PROPS' and region.width <= 1:
                  return False
  
          return True
  
      def draw(self, context):
          layout = self.layout
          space = context.space_data
          params = space.params
  
          layout.scale_x = 1.3
          layout.scale_y = 1.3
  
          row = layout.row()
          flow = row.grid_flow(row_major=True, columns=0, even_columns=False, even_rows=False, align=False)
  
          subrow = flow.row()
  
          subsubrow = subrow.row(align=True)
          subsubrow.operator("file.previous", text="", icon='BACK')
          subsubrow.operator("file.next", text="", icon='FORWARD')
          subsubrow.operator("file.parent", text="", icon='FILE_PARENT')
          subsubrow.operator("file.refresh", text="", icon='FILE_REFRESH')
  
          subsubrow = subrow.row()
          subsubrow.operator_context = 'EXEC_DEFAULT'
          subsubrow.operator("file.directory_new", icon='NEWFOLDER', text="")
  
          subrow.template_file_select_path(params)
  
          subrow = flow.row()
  
          subsubrow = subrow.row()
          subsubrow.scale_x = 0.6
          subsubrow.prop(params, "filter_search", text="", icon='VIEWZOOM')
  
          # Uses prop_with_popover() as popover() only adds the triangle icon in headers.
          subrow.prop_with_popover(
              params,
              "display_type",
              panel="FILEBROWSER_PT_display",
              text="",
              icon_only=True,
          )
          subrow.prop_with_popover(
              params,
              "display_type",
              panel="FILEBROWSER_PT_filter",
              text="",
              icon='FILTER',
              icon_only=True,
          )
  
          if space.active_operator:
              subrow.operator(
                  "screen.region_toggle",
                  text="",
                  icon='PREFERENCES',
                  depress=self.is_option_region_visible(context, space)
              ).region_type = 'TOOL_PROPS'
  
  
  class FILEBROWSER_MT_view(Menu):
      bl_label = "View"
  
      def draw(self, context):
          layout = self.layout
          st = context.space_data
          params = st.params
  
          layout.prop(st, "show_region_toolbar", text="Source List")
          layout.prop(st, "show_region_ui", text="File Path")
  
          layout.separator()
  
          layout.prop_menu_enum(params, "display_size")
          layout.prop_menu_enum(params, "recursion_level")
  
          layout.separator()
  
          layout.menu("INFO_MT_area")
  
  
  class FILEBROWSER_MT_select(Menu):
      bl_label = "Select"
  
      def draw(self, _context):
          layout = self.layout
  
          layout.operator("file.select_all", text="All").action = 'SELECT'
          layout.operator("file.select_all", text="None").action = 'DESELECT'
          layout.operator("file.select_all", text="Inverse").action = 'INVERT'
  
          layout.separator()
  
          layout.operator("file.select_box")
  
  
  class FILEBROWSER_MT_context_menu(Menu):
      bl_label = "Files Context Menu"
  
      def draw(self, context):
          layout = self.layout
          st = context.space_data
          params = st.params
  
          layout.operator("file.previous", text="Back")
          layout.operator("file.next", text="Forward")
          layout.operator("file.parent", text="Go to Parent")
          layout.operator("file.refresh", text="Refresh")
  
          layout.separator()
  
          layout.operator("file.filenum", text="Increase Number",
                          icon='ADD').increment = 1
          layout.operator("file.filenum", text="Decrease Number",
                          icon='REMOVE').increment = -1
  
          layout.separator()
  
          layout.operator("file.rename", text="Rename")
          sub = layout.row()
          sub.operator_context = 'EXEC_DEFAULT'
          sub.operator("file.delete", text="Delete")
  
          layout.separator()
  
          sub = layout.row()
          sub.operator_context = 'EXEC_DEFAULT'
          sub.operator("file.directory_new", text="New Folder")
          layout.operator("file.bookmark_add", text="Add Bookmark")
  
          layout.separator()
  
          layout.prop_menu_enum(params, "display_type")
          if params.display_type == 'THUMBNAIL':
              layout.prop_menu_enum(params, "display_size")
          layout.prop_menu_enum(params, "recursion_level", text="Recursions")
          layout.prop_menu_enum(params, "sort_method")
  
  
  classes = (
      FILEBROWSER_HT_header,
      FILEBROWSER_PT_display,
      FILEBROWSER_PT_filter,
      FILEBROWSER_UL_dir,
      FILEBROWSER_PT_bookmarks_volumes,
      FILEBROWSER_PT_bookmarks_system,
      FILEBROWSER_MT_bookmarks_context_menu,
      FILEBROWSER_PT_bookmarks_favorites,
      FILEBROWSER_PT_bookmarks_recents,
      FILEBROWSER_PT_advanced_filter,
      FILEBROWSER_PT_directory_path,
      FILEBROWSER_MT_view,
      FILEBROWSER_MT_select,
      FILEBROWSER_MT_context_menu,
  )
  
  if __name__ == "__main__":  # only for live edit.
      from bpy.utils import register_class
  
      for cls in classes:
          register_class(cls)
  