Anim: add Comet and Blink border animations

Two new DF-owned OnUpdate effects, driven off our own overlay textures
via the shared driver (no LibCustomGlow, so they run on the 12.1 aura
buttons too):

- Comet: a bright head sweeps the perimeter with a fading tail — a DF
  stand-in for the LCG AutocastGlow that can't run on aura buttons.
- Blink: a hard on/off strobe on all edges (crisp alert), distinct from
  DF Pulsate's smooth fade.

Added to customTicks + DRIVER_ANIMS (Border.lua), SAFE_OVERLAY_ANIM
(AuraContainer), the animation-type dropdown + parameter maps (GUI), and
locale. Available on every border-animation surface.

Author: Krathe82

CHANGELOG.md

@@ -11,6 +11,7 @@ DandersFrames has been rebuilt for WoW 12.1 (Midnight), which fundamentally chan
 * (Tooltips) **The aura tooltip Enable toggles now apply immediately on the 12.1 aura rows** — turning Buff / Debuff / Defensive Icon tooltips on or off used to do nothing until the next unrelated settings change. The remaining tooltip options can't apply to aura icons on 12.1 and are marked in place: the game draws its aura tooltip at a fixed spot beside the icon with no addon hook (Anchor / Offset), and the icon's mouse state is protected during combat so hover can't be dropped per-combat (Disable in Combat). All of these keep working for Frame and Binding tooltips, which aren't aura-driven.
 * (Aura Designer) **The designer's own preview canvas renders through the real 12.1 engine** — the indicators you drag around on the editor's mock frame are styled by the exact same code that styles them live (size, borders, border animations, duration/stack text, bar fill), so what you see in the editor is what ships to the frames. Out-of-range fading also works on Aura Designer indicators again (the whole indicator dims with your configured alpha).
 * (Aura Designer) **Test mode previews the Aura Designer through the real 12.1 engine** — each placed indicator renders in its actual container wearing its own configured spell's icon, name and tooltip identity, with live-true position, borders, animations and fonts; frame effects (health-bar colour, background, frame border) apply exactly as they do live. The old hand-painted preview is gone, and preview sounds are no longer registered with the game while test mode is open.
+* (Interface) **Two new border animations: Comet and Blink.** Comet sweeps a bright head with a fading tail around the border (a DF-drawn take on the old rotating glow); Blink is a crisp on/off strobe for an at-a-glance alert. Both are available anywhere DF border animations are — frame borders, Aura Designer indicators, and the Defensive / Missing-Buff icons.
 * (Auras) **Animated borders are back for Defensive and Missing-Buff icons.** The border animations (Pulsate, Wipe, Ripple, Segment Reveal, Marching Dash, Sides/Corners) were marked as a 12.1 limitation during the rework, but the Aura Designer's own approach — DF-drawn border textures animated by an external driver, rather than Blizzard's aura-button glow — works on the container icons too. The particle-glow styles (Pixel/Autocast/Button/Proc) still can't run on the new aura buttons and are hidden from these dropdowns. Under the hood the animation driver is now shared (one timer for all animated borders instead of one each), so it's lighter across the board.
 * (Auras) **Out-of-range and dead-unit fading works on the 12.1 aura displays again** — buff/debuff rows, defensive icons and the missing-buff strip now dim as one when the unit is out of range (with your configured out-of-range alphas), live and in test mode. This was a known gap since the rework.
 * (Aura Designer) The spell picker shows one unified grid — the separate "Inferred Tracking" section (and its cast-tracking caveats) is gone. On 12.1 every tracked aura works the same way, driven by the game's native spell-ID matching, so the whitelisted/inferred distinction no longer exists.

Frames/AuraContainer.lua

@@ -91,6 +91,8 @@ local SAFE_OVERLAY_ANIM = {
     DF_DASH        = true,
     CORNERS_ONLY   = true,
     SIDES_ONLY     = true,
+    COMET          = true,
+    BLINK          = true,
 }
 -- Exposed so non-container consumers that apply a secretRect border directly
 -- (the missing-buff badge) can restrict to the same taint-safe DF-owned set.

Frames/Border.lua

@@ -873,6 +873,38 @@ customTicks.SEGMENT_REVEAL = function(border, anim, elapsed)
     end
 end
 
+-- COMET: a bright head travels the perimeter clockwise with a fading tail
+-- trailing behind it. Like WIPE but asymmetric — the edge the head just left
+-- dims gradually instead of symmetrically, reading as a comet / "chase". A
+-- DF-owned stand-in for the LCG AutocastGlow that can't run on aura buttons.
+customTicks.COMET = function(border, anim, elapsed)
+    local o = border.animOverlay; if not o then return end
+    local period = tickPeriod(anim, 2)
+    local t = (elapsed % period) / period
+    local tail = 0.45   -- trail length as a fraction of the loop
+    local function comet(c)
+        local d = (t - c) % 1          -- how far the head has passed this edge
+        if d <= tail then return 1 - d / tail end
+        return 0
+    end
+    if o.top    then o.top:SetAlpha(comet(0))     end
+    if o.right  then o.right:SetAlpha(comet(0.25)) end
+    if o.bottom then o.bottom:SetAlpha(comet(0.5)) end
+    if o.left   then o.left:SetAlpha(comet(0.75))  end
+end
+
+-- BLINK: a hard on/off strobe on all four edges together — a crisp "alert"
+-- pulse, distinct from DF_PULSATE's smooth fade. Frequency is blinks/second.
+customTicks.BLINK = function(border, anim, elapsed)
+    local o = border.animOverlay; if not o then return end
+    local period = tickPeriod(anim, 1)
+    local on = ((elapsed % period) / period) < 0.5 and 1 or 0
+    if o.top    then o.top:SetAlpha(on)    end
+    if o.right  then o.right:SetAlpha(on)  end
+    if o.bottom then o.bottom:SetAlpha(on) end
+    if o.left   then o.left:SetAlpha(on)   end
+end
+
 -- ===== STATIC SHAPE MODES =====
 
 -- SIDES_ONLY: reveal the overlay textures (anim.thickness, anim.color) on
@@ -1062,7 +1094,7 @@ end
 -- OnUpdate-driver effects: those whose motion is driven by the shared anim
 -- driver's OnUpdate (as opposed to LCG glows or the static shape modes). The dedupe in
 -- StartAnimation verifies the driver is actually live for these before no-opping.
-local DRIVER_ANIMS = { DF_DASH = true, WIPE = true, RIPPLE = true, SEGMENT_REVEAL = true, DF_PULSATE = true }
+local DRIVER_ANIMS = { DF_DASH = true, WIPE = true, RIPPLE = true, SEGMENT_REVEAL = true, DF_PULSATE = true, COMET = true, BLINK = true }
 
 function Border:StartAnimation(border, spec)
     if not border or not spec or not spec.animation then

GUI/GUI.lua

@@ -4793,14 +4793,14 @@ function GUI:CreateAnimationControls(group, dbTable, animPrefix, opts)
     -- DF_DASH: Frequency = march SPEED (0 = static dashed), Thickness = dash
     -- thickness, Inset = dash inset.
     local hasFrequency = { PULSATE=1, DF_PULSATE=1, CHASE=1, FLASH=1, PROC=1,
-                           WIPE=1, RIPPLE=1, SEGMENT_REVEAL=1, DF_DASH=1 }
+                           WIPE=1, RIPPLE=1, SEGMENT_REVEAL=1, DF_DASH=1, COMET=1, BLINK=1 }
     local hasParticles = { PULSATE=1, CHASE=1 }
     local hasThickness = { PULSATE=1, WIPE=1, RIPPLE=1, SEGMENT_REVEAL=1,
-                           SIDES_ONLY=1, CORNERS_ONLY=1, DF_DASH=1 }
+                           SIDES_ONLY=1, CORNERS_ONLY=1, DF_DASH=1, COMET=1, BLINK=1 }
     -- Inset / Offset apply to every non-NONE effect EXCEPT DF_PULSATE (which
     -- modulates the border's own edges and has no separate animRect).
     local hasPositioning = { PULSATE=1, CHASE=1, FLASH=1, PROC=1, WIPE=1, RIPPLE=1,
-                             SEGMENT_REVEAL=1, SIDES_ONLY=1, CORNERS_ONLY=1, DF_DASH=1 }
+                             SEGMENT_REVEAL=1, SIDES_ONLY=1, CORNERS_ONLY=1, DF_DASH=1, COMET=1, BLINK=1 }
     local pulsateOnly  = { PULSATE=1 }
     local chaseOnly    = { CHASE=1 }
     local sidesOnly    = { SIDES_ONLY=1 }
@@ -4830,10 +4830,12 @@ function GUI:CreateAnimationControls(group, dbTable, animPrefix, opts)
         SIDES_ONLY = L["Sides Only"],
         CORNERS_ONLY = L["Corners Only"],
         DF_DASH = L["DF Dash"],
+        COMET = L["Comet"],
+        BLINK = L["Blink"],
         -- None first (the "off" option), then alphabetical by label.
-        _order = { "NONE", "CHASE", "CORNERS_ONLY", "DF_DASH", "DF_PULSATE",
-                   "FLASH", "PROC", "PULSATE", "RIPPLE", "SEGMENT_REVEAL",
-                   "SIDES_ONLY", "WIPE" },
+        _order = { "NONE", "BLINK", "CHASE", "COMET", "CORNERS_ONLY", "DF_DASH",
+                   "DF_PULSATE", "FLASH", "PROC", "PULSATE", "RIPPLE",
+                   "SEGMENT_REVEAL", "SIDES_ONLY", "WIPE" },
     }
     -- Optional caller filter: drop any excluded type from both the value map and
     -- the display order (e.g. the Aura Designer border offers only the taint-safe,

Locales/enUS.lua

@@ -1819,6 +1819,8 @@ L["Corners Only"] = true
 L["Flash"] = true
 L["Ripple"] = true
 L["Segment Reveal"] = true
+L["Comet"] = true
+L["Blink"] = true
 L["Sides Axis"] = true
 L["Sides Only"] = true
 L["Wipe"] = true