VSE: Add color tags to strips

This patch adds color tags to VSE strips, an overlay option to toggle the colors
on and off, a section in the theme settings to define the 9 possible colors and
two ways of changing the color tag through the UI. You can change the color
through the right-click context menu, or in the strip side panel next to the
strip name.

Color tags are defined in user preferences and they can be disabled in overlay
settings.

Reviewed By: campbellbarton, ISS

Differential Revision: https://developer.blender.org/D12405

1 files changed, 35 insertions, 0 deletions

diff --git a/source/blender/editors/space_sequencer/sequencer_edit.c b/source/blender/editors/space_sequencer/sequencer_edit.c
index 9f21fc0676c..6daa8d690e5 100644
--- a/source/blender/editors/space_sequencer/sequencer_edit.c
+++ b/source/blender/editors/space_sequencer/sequencer_edit.c
@@ -63,6 +63,7 @@
 #include "WM_types.h"
 
 #include "RNA_define.h"
+#include "RNA_enum_types.h"
 
 /* For menu, popup, icons, etc. */
 #include "ED_numinput.h"
@@ -3322,4 +3323,38 @@ void SEQUENCER_OT_strip_transform_fit(struct wmOperatorType *ot)
                           "Scale fit fit_method");
 }
 
+static int sequencer_strip_color_tag_set_exec(bContext *C, wmOperator *op)
+{
+  Scene *scene = CTX_data_scene(C);
+  const Editing *ed = SEQ_editing_get(scene);
+  const short color_tag = RNA_enum_get(op->ptr, "color");
+
+  LISTBASE_FOREACH (Sequence *, seq, &ed->seqbase) {
+    if (seq->flag & SELECT) {
+      seq->color_tag = color_tag;
+    }
+  }
+
+  WM_event_add_notifier(C, NC_SCENE | ND_SEQUENCER, scene);
+  return OPERATOR_FINISHED;
+}
+
+void SEQUENCER_OT_strip_color_tag_set(struct wmOperatorType *ot)
+{
+  /* Identifiers. */
+  ot->name = "Set Color Tag";
+  ot->idname = "SEQUENCER_OT_strip_color_tag_set";
+  ot->description = "Set a color tag for the selected strips";
+
+  /* Api callbacks. */
+  ot->exec = sequencer_strip_color_tag_set_exec;
+  ot->poll = sequencer_edit_poll;
+
+  /* Flags. */
+  ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
+
+  RNA_def_enum(
+      ot->srna, "color", rna_enum_strip_color_items, SEQUENCE_COLOR_NONE, "Color Tag", "");
+}
+
 /** \} */