power_sequencer/operators/markers_set_preview_in_between.py

   1 # SPDX-FileCopyrightText: 2016-2020 by Nathan Lovato, Daniel Oakey, Razvan Radulescu, and contributors
   2 #
   3 # SPDX-License-Identifier: GPL-3.0-or-later
   4
   5 import bpy
   6
   7 from .utils.functions import find_neighboring_markers
   8 from .utils.doc import doc_name, doc_idname, doc_brief, doc_description
   9
  10
  11 class POWER_SEQUENCER_OT_set_preview_between_markers(bpy.types.Operator):
  12     """
  13     Set the timeline's preview range using the 2 markers closest to the time cursor
  14     """
  15
  16     doc = {
  17         "name": doc_name(__qualname__),
  18         "demo": "",
  19         "description": doc_description(__doc__),
  20         "shortcuts": [],
  21         "keymap": "Sequencer",
  22     }
  23     bl_idname = doc_idname(__qualname__)
  24     bl_label = doc["name"]
  25     bl_description = doc_brief(doc["description"])
  26     bl_options = {"REGISTER", "UNDO"}
  27
  28     @classmethod
  29     def poll(cls, context):
  30         return context.scene.sequence_editor
  31
  32     def invoke(self, context, event):
  33         if not context.scene.timeline_markers:
  34             self.report({"ERROR_INVALID_INPUT"}, "There are no markers. Operation cancelled.")
  35             return {"CANCELLED"}
  36
  37         frame = context.scene.frame_current
  38         previous_marker, next_marker = find_neighboring_markers(context, frame)
  39
  40         if not (previous_marker and next_marker):
  41             self.report({"ERROR_INVALID_INPUT"}, "There are no markers. Operation cancelled.")
  42             return {"CANCELLED"}
  43
  44         frame_start = previous_marker.frame if previous_marker else 0
  45         if next_marker:
  46             frame_end = next_marker.frame
  47         else:
  48             from operator import attrgetter
  49
  50             frame_end = max(
  51                 context.scene.sequence_editor.sequences, key=attrgetter("frame_final_end")
  52             ).frame_final_end
  53
  54         from .utils.functions import set_preview_range
  55
  56         set_preview_range(context, frame_start, frame_end)
  57         return {"FINISHED"}