Add the VSE addon Power Sequencer

1 files changed, 135 insertions, 0 deletions

diff --git a/power_sequencer/operators/gap_remove.py b/power_sequencer/operators/gap_remove.py
new file mode 100644
index 00000000..8ef00b6b
--- /dev/null
+++ b/power_sequencer/operators/gap_remove.py
@@ -0,0 +1,135 @@
+#
+# 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 operator import attrgetter
+
+from .utils.functions import slice_selection, sequencer_workaround_2_80_audio_bug
+from .utils.doc import doc_name, doc_idname, doc_brief, doc_description
+
+
+class POWER_SEQUENCER_OT_gap_remove(bpy.types.Operator):
+    """
+    Remove gaps, starting from the first frame, with the ability to ignore locked strips
+    """
+
+    doc = {
+        "name": doc_name(__qualname__),
+        "demo": "",
+        "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"}
+
+    ignore_locked: bpy.props.BoolProperty(
+        name="Ignore Locked Strips",
+        description="Remove gaps without moving locked strips",
+        default=True,
+    )
+    all: bpy.props.BoolProperty(
+        name="Remove All",
+        description="Remove all gaps starting from the time cursor",
+        default=False,
+    )
+    frame: bpy.props.IntProperty(
+        name="Frame",
+        description="Frame to remove gaps from, defaults at the time cursor",
+        default=-1,
+    )
+
+    @classmethod
+    def poll(cls, context):
+        return context.sequences
+
+    def execute(self, context):
+        frame = self.frame if self.frame >= 0 else context.scene.frame_current
+        sequences = (
+            [s for s in context.sequences if not s.lock]
+            if self.ignore_locked
+            else context.sequences
+        )
+        sequences = [
+            s for s in sequences if s.frame_final_start >= frame or s.frame_final_end > frame
+        ]
+        sequence_blocks = slice_selection(context, sequences)
+        if not sequence_blocks:
+            return {"FINISHED"}
+
+        gap_frame = self.find_gap_frame(context, frame, sequence_blocks[0])
+        if gap_frame == -1:
+            return {"FINISHED"}
+
+        first_block_start = min(
+            sequence_blocks[0], key=attrgetter("frame_final_start")
+        ).frame_final_start
+        blocks_after_gap = (
+            sequence_blocks[1:] if first_block_start <= gap_frame else sequence_blocks
+        )
+
+        self.gaps_remove(context, blocks_after_gap, gap_frame)
+        sequencer_workaround_2_80_audio_bug(context)
+        return {"FINISHED"}
+
+    def find_gap_frame(self, context, frame, sorted_sequences):
+        """
+        Takes a list sequences sorted by frame_final_start
+        """
+        strips_start = min(sorted_sequences, key=attrgetter("frame_final_start")).frame_final_start
+        strips_end = max(sorted_sequences, key=attrgetter("frame_final_end")).frame_final_end
+
+        gap_frame = -1
+        if strips_start > frame:
+            strips_before_frame_start = [s for s in context.sequences if s.frame_final_end <= frame]
+            frame_target = 0
+            if strips_before_frame_start:
+                frame_target = max(
+                    strips_before_frame_start, key=attrgetter("frame_final_end")
+                ).frame_final_end
+            gap_frame = frame_target if frame_target < strips_start else frame
+        else:
+            gap_frame = strips_end
+        return gap_frame
+
+    def gaps_remove(self, context, sequence_blocks, gap_frame_start):
+        """
+        Recursively removes gaps between blocks of sequences
+        """
+
+        gap_frame = gap_frame_start
+        for block in sequence_blocks:
+            gap_size = block[0].frame_final_start - gap_frame
+            if gap_size < 1:
+                continue
+
+            for s in block:
+                try:
+                    s.frame_start -= gap_size
+                except AttributeError:
+                    continue
+
+            self.move_markers(context, gap_frame, gap_size)
+            if not self.all:
+                break
+            gap_frame = block[-1].frame_final_end
+
+    def move_markers(self, context, gap_frame, gap_size):
+        markers = (m for m in context.scene.timeline_markers if m.frame > gap_frame)
+        for m in markers:
+            m.frame -= min({gap_size, m.frame - gap_frame})