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

3 files changed, 47 insertions, 13 deletions

diff --git a/source/blender/blenloader/intern/versioning_300.c b/source/blender/blenloader/intern/versioning_300.c
index 1c4a0690886..8b8b7218c0e 100644
--- a/source/blender/blenloader/intern/versioning_300.c
+++ b/source/blender/blenloader/intern/versioning_300.c
@@ -449,6 +449,12 @@ static void do_versions_sequencer_speed_effect_recursive(Scene *scene, const Lis
 #undef SEQ_SPEED_COMPRESS_IPO_Y
 }
 
+static bool do_versions_sequencer_color_tags(Sequence *seq, void *UNUSED(user_data))
+{
+  seq->color_tag = SEQUENCE_COLOR_NONE;
+  return true;
+}
+
 static bNodeLink *find_connected_link(bNodeTree *ntree, bNodeSocket *in_socket)
 {
   LISTBASE_FOREACH (bNodeLink *, link, &ntree->links) {
@@ -1614,18 +1620,7 @@ void blo_do_versions_300(FileData *fd, Library *UNUSED(lib), Main *bmain)
     }
   }
 
-  /**
-   * Versioning code until next subversion bump goes here.
-   *
-   * \note Be sure to check when bumping the version:
-   * - "versioning_userdef.c", #blo_do_versions_userdef
-   * - "versioning_userdef.c", #do_versions_theme
-   *
-   * \note Keep this message at the bottom of the function.
-   */
-  {
-    /* Keep this block, even when empty. */
-
+  if (!MAIN_VERSION_ATLEAST(bmain, 300, 31)) {
     /* Swap header with the tool header so the regular header is always on the edge. */
     for (bScreen *screen = bmain->screens.first; screen; screen = screen->id.next) {
       LISTBASE_FOREACH (ScrArea *, area, &screen->areabase) {
@@ -1650,5 +1645,37 @@ void blo_do_versions_300(FileData *fd, Library *UNUSED(lib), Main *bmain)
         }
       }
     }
+
+    /* Set strip color tags to SEQUENCE_COLOR_NONE. */
+    LISTBASE_FOREACH (Scene *, scene, &bmain->scenes) {
+      if (scene->ed != NULL) {
+        SEQ_for_each_callback(&scene->ed->seqbase, do_versions_sequencer_color_tags, NULL);
+      }
+    }
+
+    /* Show vse color tags by default. */
+    LISTBASE_FOREACH (bScreen *, screen, &bmain->screens) {
+      LISTBASE_FOREACH (ScrArea *, area, &screen->areabase) {
+        LISTBASE_FOREACH (SpaceLink *, sl, &area->spacedata) {
+          if (sl->spacetype == SPACE_SEQ) {
+            SpaceSeq *sseq = (SpaceSeq *)sl;
+            sseq->timeline_overlay.flag |= SEQ_TIMELINE_SHOW_STRIP_COLOR_TAG;
+          }
+        }
+      }
+    }
+  }
+
+  /**
+   * Versioning code until next subversion bump goes here.
+   *
+   * \note Be sure to check when bumping the version:
+   * - "versioning_userdef.c", #blo_do_versions_userdef
+   * - "versioning_userdef.c", #do_versions_theme
+   *
+   * \note Keep this message at the bottom of the function.
+   */
+  {
+    /* Keep this block, even when empty. */
   }
 }
diff --git a/source/blender/blenloader/intern/versioning_defaults.c b/source/blender/blenloader/intern/versioning_defaults.c
index 152ef79a38f..c383c1cc4e5 100644
--- a/source/blender/blenloader/intern/versioning_defaults.c
+++ b/source/blender/blenloader/intern/versioning_defaults.c
@@ -160,7 +160,8 @@ static void blo_update_defaults_screen(bScreen *screen,
       seq->flag |= SEQ_SHOW_MARKERS | SEQ_ZOOM_TO_FIT | SEQ_USE_PROXIES | SEQ_SHOW_OVERLAY;
       seq->render_size = SEQ_RENDER_SIZE_PROXY_100;
       seq->timeline_overlay.flag |= SEQ_TIMELINE_SHOW_STRIP_SOURCE | SEQ_TIMELINE_SHOW_STRIP_NAME |
-                                    SEQ_TIMELINE_SHOW_STRIP_DURATION | SEQ_TIMELINE_SHOW_GRID;
+                                    SEQ_TIMELINE_SHOW_STRIP_DURATION | SEQ_TIMELINE_SHOW_GRID |
+                                    SEQ_TIMELINE_SHOW_STRIP_COLOR_TAG;
       seq->preview_overlay.flag |= SEQ_PREVIEW_SHOW_OUTLINE_SELECTED;
     }
     else if (area->spacetype == SPACE_TEXT) {
diff --git a/source/blender/blenloader/intern/versioning_userdef.c b/source/blender/blenloader/intern/versioning_userdef.c
index 54a0f1beec1..cd365b6be78 100644
--- a/source/blender/blenloader/intern/versioning_userdef.c
+++ b/source/blender/blenloader/intern/versioning_userdef.c
@@ -295,6 +295,12 @@ static void do_versions_theme(const UserDef *userdef, bTheme *btheme)
     FROM_DEFAULT_V4_UCHAR(space_node.wire);
   }
 
+  if (!USER_VERSION_ATLEAST(300, 31)) {
+    for (int i = 0; i < SEQUENCE_COLOR_TOT; ++i) {
+      FROM_DEFAULT_V4_UCHAR(strip_color[i].color);
+    }
+  }
+
   /**
    * Versioning code until next subversion bump goes here.
    *