Add the VSE addon Power Sequencer

1 files changed, 89 insertions, 0 deletions

diff --git a/power_sequencer/operators/crossfade_edit.py b/power_sequencer/operators/crossfade_edit.py
new file mode 100644
index 00000000..127ab603
--- /dev/null
+++ b/power_sequencer/operators/crossfade_edit.py
@@ -0,0 +1,89 @@
+#
+# Copyright (C) 2016-2019 by Nathan Lovato, Daniel Oakey, Razvan Radulescu, and contributors
+#
+# This file is part of Power Sequencer.
+#
+# Power Sequencer 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 3 of the
+# License, or (at your option) any later version.
+#
+# Power Sequencer 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 Power Sequencer. If
+# not, see <https://www.gnu.org/licenses/>.
+#
+import bpy
+
+from .utils.global_settings import SequenceTypes
+from .utils.doc import doc_name, doc_idname, doc_brief, doc_description
+
+
+class POWER_SEQUENCER_OT_crossfade_edit(bpy.types.Operator):
+    """
+    *brief* Adjust the location of the crossfade between 2 strips
+
+
+    Selects the handles of both inputs of a crossfade strip's input and
+    calls the grab operator. Allows you to quickly change the location
+    of a fade transition between two strips.
+    """
+
+    doc = {
+        "name": doc_name(__qualname__),
+        "demo": "https://i.imgur.com/rCmLhg6.gif",
+        "description": doc_description(__doc__),
+        "shortcuts": [],
+        "keymap": "Sequencer",
+    }
+    bl_idname = doc_idname(__qualname__)
+    bl_label = doc["name"]
+    bl_description = doc_brief(doc["description"])
+    bl_options = {"REGISTER", "UNDO"}
+
+    crossfade_types = ["CROSS", "GAMMA_CROSS"]
+
+    @classmethod
+    def poll(cls, context):
+        return context.scene.sequence_editor.active_strip and context.selected_sequences
+
+
+    def execute(self, context):
+        active = context.scene.sequence_editor.active_strip
+        if active.type not in self.crossfade_types:
+            effect = self.find_cross_effect(context, active)
+            if not effect:
+                return {"CANCELLED"}
+            active = context.scene.sequence_editor.active_strip = effect
+
+        bpy.ops.sequencer.select_all(action="DESELECT")
+        active.select = True
+        active.input_1.select_right_handle = True
+        active.input_2.select_left_handle = True
+        active.input_1.select = True
+        active.input_2.select = True
+        bpy.ops.transform.seq_slide("INVOKE_DEFAULT")
+        return {"FINISHED"}
+
+    def find_cross_effect(self, sequence):
+        """
+        Takes a single strip and finds effect strips that use it as input
+        Returns the effect strip(s) found as a list, ordered by starting frame
+        Returns None if no effect was found
+        """
+        if sequence.type not in SequenceTypes.VIDEO + SequenceTypes.IMAGE:
+            return
+
+        effect_sequences = (s for s in context.sequences if s.type in SequenceTypes.EFFECT)
+        found_effect_strips = []
+        for s in effect_sequences:
+            if s.input_1.name == sequence.name:
+                found_effect_strips.append(s)
+            if s.input_count == 2:
+                if s.input_2.name == sequence.name:
+                    found_effect_strips.append(s)
+        for e in found_effect_strips:
+            if e.type not in self.crossfade_types:
+                continue
+            return e