diff options
Diffstat (limited to 'Userland/Libraries')
| -rw-r--r-- | Userland/Libraries/LibWeb/DOM/EventDispatcher.cpp | 106 |
1 files changed, 96 insertions, 10 deletions
diff --git a/Userland/Libraries/LibWeb/DOM/EventDispatcher.cpp b/Userland/Libraries/LibWeb/DOM/EventDispatcher.cpp index bcc6fd8435..8f2a552855 100644 --- a/Userland/Libraries/LibWeb/DOM/EventDispatcher.cpp +++ b/Userland/Libraries/LibWeb/DOM/EventDispatcher.cpp @@ -33,18 +33,24 @@ namespace Web::DOM { // When moving this function, it needs to be generalized. https://dom.spec.whatwg.org/#retarget static EventTarget* retarget(EventTarget* left, EventTarget* right) { + // To retarget an object A against an object B, repeat these steps until they return an object: for (;;) { + // 1. If one of the following is true then return A. + // 1.1 A is not a node if (!is<Node>(left)) return left; + // 1.2 A’s root is not a shadow root auto* left_node = verify_cast<Node>(left); auto& left_root = left_node->root(); if (!is<ShadowRoot>(left_root)) return left; + // B is a node and A’s root is a shadow-including inclusive ancestor of B if (is<Node>(right) && left_root.is_shadow_including_inclusive_ancestor_of(verify_cast<Node>(*right))) return left; + // 2. Set A to A’s root’s host. auto& left_shadow_root = verify_cast<ShadowRoot>(left_root); left = left_shadow_root.host(); } @@ -146,24 +152,40 @@ void EventDispatcher::invoke(Event::PathEntry& struct_, Event& event, Event::Pha VERIFY(last_valid_shadow_adjusted_target.has_value()); + // 1. Set event’s target to the shadow-adjusted target of the last struct in event’s path, + // that is either struct or preceding struct, whose shadow-adjusted target is non-null. event.set_target(last_valid_shadow_adjusted_target.value().shadow_adjusted_target); + + // 2. Set event’s relatedTarget to struct’s relatedTarget. event.set_related_target(struct_.related_target); + + // 3. Set event’s touch target list to struct’s touch target list. event.set_touch_target_list(struct_.touch_target_list); + // 4. If event’s stop propagation flag is set, then return. if (event.should_stop_propagation()) return; + // 5. Initialize event’s currentTarget attribute to struct’s invocation target. event.set_current_target(struct_.invocation_target); - // NOTE: This is an intentional copy. Any event listeners added after this point will not be invoked. + // 6. Let listeners be a clone of event’s currentTarget attribute value’s event listener list. + // NOTE: This avoids event listeners added after this point from being run. Note that removal still has an effect due to the removed field. auto listeners = event.current_target()->event_listener_list(); + + // 7. Let invocationTargetInShadowTree be struct’s invocation-target-in-shadow-tree. bool invocation_target_in_shadow_tree = struct_.invocation_target_in_shadow_tree; + // 8. Let found be the result of running inner invoke with event, listeners, phase, invocationTargetInShadowTree, and legacyOutputDidListenersThrowFlag if given. bool found = inner_invoke(event, listeners, phase, invocation_target_in_shadow_tree); + // 9. If found is false and event’s isTrusted attribute is true, then: if (!found && event.is_trusted()) { + // 9.1 Let originalEventType be event’s type attribute value. auto original_event_type = event.type(); + // 9.2 If event’s type attribute value is a match for any of the strings in the first column in the following table, + // set event’s type attribute value to the string in the second column on the same row as the matching string, and return otherwise. if (event.type() == "animationend") event.set_type("webkitAnimationEnd"); else if (event.type() == "animationiteration") @@ -175,7 +197,10 @@ void EventDispatcher::invoke(Event::PathEntry& struct_, Event& event, Event::Pha else return; + // 9.3 Inner invoke with event, listeners, phase, invocationTargetInShadowTree, and legacyOutputDidListenersThrowFlag if given. inner_invoke(event, listeners, phase, invocation_target_in_shadow_tree); + + // 9.4 Set event’s type attribute value to originalEventType. event.set_type(original_event_type); } } @@ -183,82 +208,116 @@ void EventDispatcher::invoke(Event::PathEntry& struct_, Event& event, Event::Pha // https://dom.spec.whatwg.org/#concept-event-dispatch bool EventDispatcher::dispatch(NonnullRefPtr<EventTarget> target, NonnullRefPtr<Event> event, bool legacy_target_override) { + // 1. Set event’s dispatch flag. event->set_dispatched(true); - RefPtr<EventTarget> target_override; + // 2. Let targetOverride be target, if legacy target override flag is not given, and target’s associated Document otherwise. [HTML] + // NOTE: legacy target override flag is only used by HTML and only when target is a Window object. + RefPtr<EventTarget> target_override; if (!legacy_target_override) { target_override = target; } else { - // NOTE: This can be done because legacy_target_override is only set for events targeted at Window. target_override = verify_cast<HTML::Window>(*target).associated_document(); } + // 3. Let activationTarget be null. RefPtr<EventTarget> activation_target; + + // 4. Let relatedTarget be the result of retargeting event’s relatedTarget against target. RefPtr<EventTarget> related_target = retarget(event->related_target(), target); bool clear_targets = false; - + // 5. If target is not relatedTarget or target is event’s relatedTarget, then: if (related_target != target || event->related_target() == target) { + // 5.1 Let touchTargets be a new list. Event::TouchTargetList touch_targets; + // 5.2 For each touchTarget of event’s touch target list, append the result of retargeting touchTarget against target to touchTargets. for (auto& touch_target : event->touch_target_list()) { touch_targets.append(retarget(touch_target, target)); } + // 5.3 Append to an event path with event, target, targetOverride, relatedTarget, touchTargets, and false. event->append_to_path(*target, target_override, related_target, touch_targets, false); + // 5.4 Let isActivationEvent be true, if event is a MouseEvent object and event’s type attribute is "click"; otherwise false. bool is_activation_event = is<UIEvents::MouseEvent>(*event) && event->type() == HTML::EventNames::click; + // 5.5 If isActivationEvent is true and target has activation behavior, then set activationTarget to target. if (is_activation_event && target->activation_behavior) activation_target = target; - // FIXME: Let slottable be target, if target is a slottable and is assigned, and null otherwise. + // 5.6 FIXME: Let slottable be target, if target is a slottable and is assigned, and null otherwise. + // 5.7 Let slot-in-closed-tree be false bool slot_in_closed_tree = false; + + // 5.8 Let parent be the result of invoking target’s get the parent with event. auto* parent = target->get_parent(event); + // 5.9 While parent is non-null: while (parent) { - // FIXME: If slottable is non-null: - - // FIXME: If parent is a slottable and is assigned, then set slottable to parent. - + // FIXME: + // 5.9.1 If slottable is non-null: + // 5.9.1.1 Assert: parent is a slot. + // 5.9.1.2 Set slottable to null. + // 5.9.1.3 If parent’s root is a shadow root whose mode is "closed", then set slot-in-closed-tree to true. + // 5.9.2 If parent is a slottable and is assigned, then set slottable to parent. + + // 5.9.3 Let relatedTarget be the result of retargeting event’s relatedTarget against parent. related_target = retarget(event->related_target(), parent); + + // 5.9.4 Let touchTargets be a new list. touch_targets.clear(); + // 5.9.5 For each touchTarget of event’s touch target list, append the result of retargeting touchTarget against parent to touchTargets. for (auto& touch_target : event->touch_target_list()) { touch_targets.append(retarget(touch_target, parent)); } + // 5.9.6 If parent is a Window object, or parent is a node and target’s root is a shadow-including inclusive ancestor of parent, then: if (is<HTML::Window>(parent) || (is<Node>(parent) && verify_cast<Node>(*target).root().is_shadow_including_inclusive_ancestor_of(verify_cast<Node>(*parent)))) { + // 5.9.6.1 If isActivationEvent is true, event’s bubbles attribute is true, activationTarget is null, and parent has activation behavior, then set activationTarget to parent. if (is_activation_event && event->bubbles() && !activation_target && parent->activation_behavior) activation_target = parent; + // 5.9.6.2 Append to an event path with event, parent, null, relatedTarget, touchTargets, and slot-in-closed-tree. event->append_to_path(*parent, nullptr, related_target, touch_targets, slot_in_closed_tree); + } else if (related_target == parent) { + // 5.9.7 Otherwise, if parent is relatedTarget, then set parent to null. parent = nullptr; } else { + // 5.9.8 Otherwise, set target to parent and then: target = *parent; + // 5.9.8.1 If isActivationEvent is true, activationTarget is null, and target has activation behavior, then set activationTarget to target. if (is_activation_event && !activation_target && target->activation_behavior) activation_target = target; + // 5.9.8.2 Append to an event path with event, parent, target, relatedTarget, touchTargets, and slot-in-closed-tree. event->append_to_path(*parent, target, related_target, touch_targets, slot_in_closed_tree); } + // 5.9.9 If parent is non-null, then set parent to the result of invoking parent’s get the parent with event. if (parent) { parent = parent->get_parent(event); } + // 5.9.10 Set slot-in-closed-tree to false. slot_in_closed_tree = false; } + // 5.10 Let clearTargetsStruct be the last struct in event’s path whose shadow-adjusted target is non-null. auto clear_targets_struct = event->path().last_matching([](auto& entry) { return !entry.shadow_adjusted_target.is_null(); }); VERIFY(clear_targets_struct.has_value()); + // 5.11 Let clearTargets be true if clearTargetsStruct’s shadow-adjusted target, clearTargetsStruct’s relatedTarget, + // or an EventTarget object in clearTargetsStruct’s touch target list is a node and its root is a shadow root; otherwise false. if (is<Node>(clear_targets_struct.value().shadow_adjusted_target.ptr())) { auto& shadow_adjusted_target_node = verify_cast<Node>(*clear_targets_struct.value().shadow_adjusted_target); if (is<ShadowRoot>(shadow_adjusted_target_node.root())) @@ -283,55 +342,82 @@ bool EventDispatcher::dispatch(NonnullRefPtr<EventTarget> target, NonnullRefPtr< } } + // 5.12 If activationTarget is non-null and activationTarget has legacy-pre-activation behavior, then run activationTarget’s legacy-pre-activation behavior. if (activation_target) activation_target->legacy_pre_activation_behavior(); + // 5.13 For each struct in event’s path, in reverse order: for (auto& entry : event->path().in_reverse()) { + // 5.13.1 If struct’s shadow-adjusted target is non-null, then set event’s eventPhase attribute to AT_TARGET. if (entry.shadow_adjusted_target) event->set_phase(Event::Phase::AtTarget); else + // 5.13.2 Otherwise, set event’s eventPhase attribute to CAPTURING_PHASE. event->set_phase(Event::Phase::CapturingPhase); + // 5.13.3 Invoke with struct, event, "capturing", and legacyOutputDidListenersThrowFlag if given. invoke(entry, event, Event::Phase::CapturingPhase); } + // 5.14 For each struct in event’s path: for (auto& entry : event->path()) { + // 5.14.1 If struct’s shadow-adjusted target is non-null, then set event’s eventPhase attribute to AT_TARGET. if (entry.shadow_adjusted_target) { event->set_phase(Event::Phase::AtTarget); } else { + // 5.14.2 Otherwise: + // 5.14.2.1 If event’s bubbles attribute is false, then continue. if (!event->bubbles()) continue; + // 5.14.2.2 Set event’s eventPhase attribute to BUBBLING_PHASE. event->set_phase(Event::Phase::BubblingPhase); } + // 5.14.3 Invoke with struct, event, "bubbling", and legacyOutputDidListenersThrowFlag if given. invoke(entry, event, Event::Phase::BubblingPhase); } } + // 6. Set event’s eventPhase attribute to NONE. event->set_phase(Event::Phase::None); + + // 7. Set event’s currentTarget attribute to null. event->set_current_target(nullptr); + + // 8. Set event’s path to the empty list. event->clear_path(); + + // 9. Unset event’s dispatch flag, stop propagation flag, and stop immediate propagation flag. event->set_dispatched(false); event->set_stop_propagation(false); event->set_stop_immediate_propagation(false); + // 10. If clearTargets, then: if (clear_targets) { + // 10.1 Set event’s target to null. event->set_target(nullptr); + + // 10.2 Set event’s relatedTarget to null. event->set_related_target(nullptr); + + // 10.3 Set event’s touch target list to the empty list. event->clear_touch_target_list(); } + // 11. If activationTarget is non-null, then: if (activation_target) { + // 11.1 If event’s canceled flag is unset, then run activationTarget’s activation behavior with event. if (!event->cancelled()) { - // NOTE: Since activation_target is set, it will have activation behavior. activation_target->activation_behavior(event); activation_target->legacy_cancelled_activation_behavior_was_not_called(); } else { + // 11.2 Otherwise, if activationTarget has legacy-canceled-activation behavior, then run activationTarget’s legacy-canceled-activation behavior. activation_target->legacy_cancelled_activation_behavior(); } } + // 12. Return false if event’s canceled flag is set; otherwise true. return !event->cancelled(); } |