using System.Collections.Generic; using Unity.UIWidgets.foundation; namespace Unity.UIWidgets.gestures { class _CombiningGestureArenaEntry : GestureArenaEntry { public _CombiningGestureArenaEntry(_CombiningGestureArenaMember _combiner, GestureArenaMember _member) { this._combiner = _combiner; this._member = _member; } readonly _CombiningGestureArenaMember _combiner; readonly GestureArenaMember _member; public override void resolve(GestureDisposition disposition) { this._combiner._resolve(this._member, disposition); } } class _CombiningGestureArenaMember : GestureArenaMember { public _CombiningGestureArenaMember(GestureArenaTeam _owner, int _pointer) { this._owner = _owner; this._pointer = _pointer; } readonly GestureArenaTeam _owner; readonly List _members = new List(); readonly int _pointer; bool _resolved = false; GestureArenaMember _winner; GestureArenaEntry _entry; public void acceptGesture(int pointer) { D.assert(this._pointer == pointer); D.assert(this._winner != null || this._members.isNotEmpty()); this._close(); this._winner = this._winner ?? this._owner.captain ?? this._members[0]; foreach (GestureArenaMember member in this._members) { if (member != this._winner) { member.rejectGesture(pointer); } } this._winner.acceptGesture(pointer); } public void rejectGesture(int pointer) { D.assert(this._pointer == pointer); this._close(); foreach (GestureArenaMember member in this._members) { member.rejectGesture(pointer); } } void _close() { D.assert(!this._resolved); this._resolved = true; var combiner = this._owner._combiners[this._pointer]; D.assert(combiner == this); this._owner._combiners.Remove(this._pointer); } internal GestureArenaEntry _add(int pointer, GestureArenaMember member) { D.assert(!this._resolved); D.assert(this._pointer == pointer); this._members.Add(member); this._entry = this._entry ?? this._owner._gestureArena.add(pointer, this); return new _CombiningGestureArenaEntry(this, member); } internal void _resolve(GestureArenaMember member, GestureDisposition disposition) { if (this._resolved) { return; } if (disposition == GestureDisposition.rejected) { this._members.Remove(member); member.rejectGesture(this._pointer); if (this._members.isEmpty()) { this._entry.resolve(disposition); } } else { this._winner = this._winner ?? this._owner.captain ?? member; this._entry.resolve(disposition); } } } public class GestureArenaTeam { public GestureArenaTeam(GestureArenaManager gestureArena) { this._gestureArena = gestureArena; } internal readonly GestureArenaManager _gestureArena; internal readonly Dictionary _combiners = new Dictionary(); public GestureArenaMember captain; public GestureArenaEntry add(int pointer, GestureArenaMember member) { _CombiningGestureArenaMember combiner; if (!this._combiners.TryGetValue(pointer, out combiner)) { combiner = new _CombiningGestureArenaMember(this, pointer); this._combiners[pointer] = combiner; } return combiner._add(pointer, member); } } }