Six parallel research lanes on retail's chat text and window behaviour, plus a
plan. The headline: the green clickable speaker name is not a chat feature and
not a colour, it is a missing capability in the TEXT stack.
Retail's client sprintfs literal tag markup into the chat line, and the text
element parses the brackets while appending, attaching a ref-counted tag PER
GLYPH. A tagged run is emergent: adjacent glyphs whose tag pointers are equal.
A glyph takes the tag colour (property 0x1D) only when a tag is open and its
type is 0x10000001; otherwise the ordinary line colour (0x1B).
The colour itself was the one thing the decomp could not settle — it is
authored, not runtime-built — so it was MEASURED out of the installed dats
rather than assumed from a screenshot: P0x1D = RGB(0,178,0). That also exposed
a trap: the tag colour is per-ELEMENT and authored while the line colour on the
same element comes from the runtime chat table, so filing "tag green" into the
LogTextType table would put it in the wrong place.
Our own audit found the gap is narrower than feared. UiText ALREADY draws
multi-coloured runs (the character stat panel uses it); the path is just gated
to single-line elements. The draw path needs no renderer work, and HitChar
already resolves a click to line+column. The real blocker is that sender
identity is destroyed before it reaches the renderer: ChatEntry carries
Sender/SenderGuid the whole way, and ChatVM.RecentLinesDetailed drops both.
Two findings beyond the original question. Retail BOUNDS its transcript
(10,000 chars, trimmed to ~7,500 at a newline) and splits auto-scroll from an
unread indicator by sampling "was at bottom" before the line lands — a naive
port auto-scrolls forever and leaks for the life of a session. And the chat-UI
audit turned up an untracked bug: Escape in the chat input does nothing at all,
because UiField has no Escape case and a focused field also suppresses the
input dispatcher's fallback.
Every lane was instructed to write "UNKNOWN — needs X" rather than guess, and
they did; the carried unknowns are listed in the plan rather than papered over.
Seven slices proposed, nothing implemented yet.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
