Spec, plan, and full implementation of the AI-message streaming
animation in ChatMessageRichDataBubbleContentNode. Extracts
TextRevealController into a shared StreamingTextReveal submodule;
precomputes per-character rects in V2 layout (RTL-safe, glyph-ink
bounds); splits InstantPageV2TextView into render container + render
view with a reveal mask layer; implements mask + snippet pop-in
reveal; adds a per-text-view reveal cost map + applyReveal extension;
switches reveal cost to a width-based unit; sizes / clips the bubble
to the revealed prefix during streaming; aligns the Thinking… header
with TextBubble; floors table cell reveal cost at cell frame width;
includes layout closing pad in revealedContentSize; documents the
non-obvious invariants in CLAUDE.md.
Snapshot list marker subviews/sublayers before iteration, anchor
strike/underline drawing to item frame height, baseline-align inline
text, images, and formulas. Also: implementation plan and two spec
refreshes (clarify extraDescent nudge removal; refresh stale line
numbers).
Design and plan, then implementation: include the details title in
selectableTextItems, restore V2 text selection in the rich bubble,
drop the InstantPageMultiTextAdapter init parameter-name split, and
split LinkHighlightingNode modern-path groups on disjoint rects.
Also includes the IP V2 inline-formula baseline alignment design doc.
Design and plan, then the implementation: extract a shared
openInstantPageMedia helper for V1+V2 reuse, add typed media item
cases + allMedias() helper, introduce InstantPageV2RenderContext and
thread it through the view tree, add four media wrapper views, route
layout dispatch through typed media items, let the chat bubble build
the render context so real media renders, wire gallery tap routing,
cache V2View by message id + stableVersion, add stable-id identity +
per-class update(item:theme:), reuse item views on re-layouts via
stable-id harvest, preserve TextView clipping inset on reuse, and let
the use site control media-reference construction.
Design, plan, and implementation. Adds .formula item case +
InstantPageV2FormulaView, bumps InstantPageMathAttachment fields to
public, routes block and inline formulas through .formula items,
aligns the scroll view with V1 (alwaysBounceHorizontal = false), and
reports narrow block formula natural width so the fitToWidth bubble
shrinks.
Initial design, plan, scaffold, and the full incremental implementation
of InstantPage V2 used by ChatMessageRichDataBubbleContentNode: layout
data types and driver, shared text helpers, text view / divider /
anchor, lists, code blocks, block/pull quotes, media placeholders,
details (with recursion), tables, hit-test / selection / last-line
helpers, V1→V2 swap in the rich-data bubble, and post-swap fix-ups
(cache key, RTL paragraphs, list geometry, lazy pageView construction,
fitToWidth horizontal inset, V2View.update() no longer writes
self.frame).
Spec, plan, and implementation of the date / checks / reactions /
effects status node on ChatMessageRichDataBubbleContentNode. Hoists
layout work out of the inner closure and anchors the status frame top
at text maxY.
Smooth-pace reveal of incoming live typing drafts. Adds the design
doc, implementation plan, the EWMA inter-arrival → velocity-smoothed
cursor core, handling for text shrink / item loss, and debug logs.
Sweep 14 BUILD files whose modules no longer have any source file with
`import Postbox`. All targets are ChatMessage*BubbleContentNode subclasses
plus WallpaperPreviewMedia — modules whose Swift sources stopped importing
Postbox in earlier waves but whose BUILD deps were not cleaned up.
Pre-flight: for each `BUILD` containing `"//submodules/Postbox"`, verified
no source file under `<module>/Sources` matches `^import Postbox$`. 14
modules met the criterion.
Build: 15s warm-cache verify, 0 errors.
Modules:
- ChatMessageActionBubbleContentNode
- ChatMessageEventLogPreviousDescriptionContentNode
- ChatMessageEventLogPreviousLinkContentNode
- ChatMessageEventLogPreviousMessageContentNode
- ChatMessageFileBubbleContentNode
- ChatMessageGameBubbleContentNode
- ChatMessageInvoiceBubbleContentNode
- ChatMessageMapBubbleContentNode
- ChatMessageMediaBubbleContentNode
- ChatMessageProfilePhotoSuggestionContentNode
- ChatMessageStoryMentionContentNode
- ChatMessageWallpaperBubbleContentNode
- ChatMessageWebpageBubbleContentNode
- WallpaperPreviewMedia
Pre-wave attempt failure note: tried 5 source-side `import Postbox` drops
first (StatsMessageItem, StarsAvatarComponent, PeerListItemComponent,
WebAppMessagePreviewScreen, OpenChatMessage). All 5 hit hidden bare
`Media`/`Message`/`PeerStoryStats`/`areMediaArraysEqual` references that
the prior pre-flight regex missed. Reverted source edits; only the
risk-free BUILD-dep sweep survives in this commit.
Lesson: pre-flight regex MUST include bare Postbox protocols
`\bMedia\b`, `\bMessage\b`, `\bPeer\b`, plus the Postbox helper
`areMediaArraysEqual` and the `PeerStoryStats` type. The previous
identifier-typealias-only regex was insufficient.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Eight-task plan covering ContextUI struct field additions,
PortalTransitionStaging helper, CCEPN animateIn/animateOut wiring,
ChatControllerNode contextTransitionContainer, two adopter sources,
and manual visual verification.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Three task plan: (1) trim ShimmeringMask BUILD deps, (2) replace stub
with full reveal-mask CAGradientLayer implementation, (3) wrap
streamingStatusTextNode in ChatMessageTextBubbleContentNode. Plus a
manual-verification task since the project has no unit-test harness.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Reusable view that applies a moving alpha-mask shimmer (rest=1.0,
dip=peakAlpha) to its contentView. First consumer: the streaming-status
text node in ChatMessageTextBubbleContentNode for ChatGPT-style
"thinking" effect.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Replaces CCEPN's manual visible-area clipping with a portal-based
transition mirroring CMTN's primitive. Adds optional
sourceTransitionSurface to TakeViewInfo/PutBackInfo; chat is the
first adopter.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Migrate `cachedWallpaper(account: Account, ...)` in WallpaperCache.swift to
take `(engine: TelegramEngine, network: Network, ...)` instead of the umbrella
Account parameter. Body drops the local `let engine = TelegramEngine(account:)`
since engine is now a parameter; `account.network` is now `network`.
19 context-based callers (`account: context.account` /
`self.context.account` / `component.context.account`) update via perl
sweep to pass `engine: context.engine, network: context.account.network`.
3 internal-Account-typed callers (WallpaperResources.swift × 2,
ThemeUpdateManager.swift × 1) bridge with adhoc
`engine: TelegramEngine(account: account), network: account.network`
since they're inside functions that still take `account: Account` and have
heavier Postbox uses we can't migrate yet.
Drops `import Postbox` from WallpaperCache.swift since the only remaining
Postbox-ish identifier was `ValueBoxKey`, which swaps to `EngineDataBuffer`.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
drawRectsImageContent's modern path computed nextRadius and
prevRadius as min(outerRadius, floor(|Δx| * 0.5)). When |Δx| < 2
the floor produces 0 and the addArc call becomes a no-op,
leaving an unsmoothed corner at the stair-step. Replace floor
with ceil so any non-zero edge mismatch rounds up to at least
1 px. Exact-equality cases (Δx == 0) are unaffected — they take
the else branch with a straight addLine.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
In drawRectsImageContent's modern path the snap loop runs midY
trimming first, leaving rects[i].maxY == rects[i+1].minY for
adjacent line rects. The X-edge snap guard then evaluated
rects[i].insetBy(dx: 0.0, dy: 1.0).intersects(rects[i+1]) — but
positive dy shrinks the rect, so after the trim the guarded
rectangle no longer intersects its neighbor (CGRect.intersects
requires positive-area overlap). Flip dy to -1.0 so the temp
rect grows and touching neighbors satisfy the guard.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Plan covers two single-line edits in LinkHighlightingNode.swift's
modern branch (X-snap dy direction; floor → ceil for stair-step
fillet radii), each landed as its own commit, with a final
full-project build for validation since this repo has no tests.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Document the analysis and intended fixes for two bugs in
LinkHighlightingNode's modern path branch: the X-edge snap is
unreachable after the midY snap (positive dy in insetBy shrinks
rect[i] so it can't intersect the touching neighbor), and the
floor() in nextRadius/prevRadius can produce zero-radius arcs.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
drawInTile previously stroked each cell's full perimeter, double-drawing
every interior gridline; visible now that the rich-data chat bubble uses
tableBorderColor at 0.25 alpha. Stroking each segment in its own
strokePath call would also have left ~1pt² overdraw at every interior
4-cell junction (where a horizontal divider crosses a vertical one) and
at every T-junction with the outer rounded rect — each strokePath
rasterizes independently and composites against the previous result.
Build a single CGMutablePath containing each cell's interior top/left
segment (skipping cells on the table's top/left boundary) plus the outer
rounded perimeter rect, and call strokePath once. CGContextStrokePath
fills the union of all stroke geometries as a single fill op, so each
pixel is painted exactly once regardless of how many segments overlap.
Empty cells (text == nil) are no longer skipped wholesale: their fill
and text remain gated on text != nil (preserves today's no-fill-for-
empty behavior), but their interior divider segments still get appended
so divider continuity is preserved around them.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Adds drag-handle text selection driven by TextSelectionNode. Exposes
attributedString and selection helpers on InstantPage text items, and
introduces a multi-text adapter aggregating items as a TextNodeProtocol.
Gates selection actions on reply-options and fixes highlight z-order.
Adds a base getAnchorRect on ChatMessageBubbleContentNode, the rich-bubble
override (including titleHeight in details recursion), bubble-item
forwarding to content nodes, ChatControllerInteraction.scrollToMessageIdWithAnchor,
and a scrollToAnchor that lands the anchor at the top of the content area /
its line. Threads anchor/scroll params through ChatController and related
call sites.
Documents a two-pass refactor for InstantPageTableItem.drawInTile that
draws each interior divider exactly once (top+left of each cell that
isn't on the table boundary) plus a single rounded-rect outer-perimeter
stroke. Needed now that tableBorderColor is being made semi-transparent
(0.25 alpha) by the rich-data chat bubble; current per-cell whole-bounds
strokes overdraw shared edges.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
