Add Chromium-only Blender WebEngine parity work

blender-5.2.0/source/blender/sequencer/intern/channels.cc

@@ -0,0 +1,75 @@
+/* SPDX-FileCopyrightText: 2022 Blender Authors
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later */
+
+/** \file
+ * \ingroup sequencer
+ */
+
+#include "MEM_guardedalloc.h"
+
+#include "DNA_listBase.h"
+#include "DNA_sequence_types.h"
+
+#include "BLI_listbase.h"
+#include "BLI_string_utf8.h"
+
+#include "BLT_translation.hh"
+
+#include "sequencer.hh"
+
+#include "SEQ_channels.hh"
+#include "SEQ_sequencer.hh"
+
+namespace blender::seq {
+
+ListBaseT<SeqTimelineChannel> *channels_displayed_get(const Editing *ed)
+{
+  return ed ? ed->current_channels() : nullptr;
+}
+
+void channels_ensure(ListBaseT<SeqTimelineChannel> *channels)
+{
+  /* Allocate channels. Channel 0 is never used, but allocated to prevent off by 1 issues. */
+  for (int i = 0; i < MAX_CHANNELS + 1; i++) {
+    SeqTimelineChannel *channel = MEM_new<SeqTimelineChannel>("seq timeline channel");
+    SNPRINTF_UTF8(channel->name, DATA_("Channel %d"), i);
+    channel->index = i;
+    BLI_addtail(channels, channel);
+  }
+}
+
+void channels_duplicate(ListBaseT<SeqTimelineChannel> *channels_dst,
+                        ListBaseT<SeqTimelineChannel> *channels_src)
+{
+  for (SeqTimelineChannel &channel : *channels_src) {
+    SeqTimelineChannel *channel_duplicate = static_cast<SeqTimelineChannel *>(
+        MEM_dupalloc(&channel));
+    BLI_addtail(channels_dst, channel_duplicate);
+  }
+}
+
+void channels_free(ListBaseT<SeqTimelineChannel> *channels)
+{
+  for (SeqTimelineChannel &channel : channels->items_mutable()) {
+    MEM_delete(&channel);
+  }
+}
+
+SeqTimelineChannel *channel_get_by_index(const ListBaseT<SeqTimelineChannel> *channels,
+                                         const int channel_index)
+{
+  return static_cast<SeqTimelineChannel *>(BLI_findlink(channels, channel_index));
+}
+
+ListBaseT<SeqTimelineChannel> *get_channels_by_strip(Editing *ed, const Strip *strip)
+{
+  Strip *strip_owner = lookup_meta_by_strip(ed, strip);
+  if (strip_owner != nullptr) {
+    return &strip_owner->channels;
+  }
+
+  return &ed->channels;
+}
+
+}  // namespace blender::seq