TimelineConflictGeometry.h header
#include <ew/app/TimelineConflictGeometry.h>Namespace ew::app
TimelineSpan struct
struct ew::app::TimelineSpanA story-time span. A positive-duration event is the half-open interval [start, end); a zero-duration event (start == end) is the single instant {start}.
Members
qint64 ew::app::TimelineSpan::start = 0Story-time instant the span begins at (inclusive).
qint64 ew::app::TimelineSpan::end = 0Story-time instant the span ends at (exclusive); equals start for an instant.
bool operator==(const TimelineSpan &, const TimelineSpan &)=defaultSpans compare equal when their start and end match.
Functions
std::optional< TimelineSpan > ew::app::timelineOverlapSpan(const TimelineSpan &a, const TimelineSpan &b)The story-time sub-span over which two events overlap, or nullopt when they do not (TL-68). The overlap DECISION matches the timeline continuity validator's "two places at once" rule EXACTLY, so the view draws a conflict's geometry over precisely the events the validator flagged: two instants overlap only when identical; an instant overlaps an interval that contains it (start <= instant < end – the interval's own start counts, its end does not); two intervals overlap when each begins before the other ends. The returned sub-span is [max(starts), min(ends)] – for an instant-vs-interval pair this collapses to the instant, and for two coincident instants to that instant. A travel pair (two events that do NOT overlap in time) yields nullopt, so only a genuine coincidence is drawn. Pure: the caller maps the returned span to pixels, so no view is needed to test it. This is the single source of truth the validator's own overlap test also calls, so the two can never drift.