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LibWeb: Make hit testing functions return Optional<HitTestResult>

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Using "HitTestResult with null paintable" as a way to signal misses was
unnecessarily confusing. Let's use Optional instead. :^)
This commit is contained in:
Andreas Kling 2022-03-21 11:11:05 +01:00
parent 8c88ee1165
commit 0ba785894c
7 changed files with 50 additions and 44 deletions
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33
Userland/Libraries/LibWeb/Page/EventHandler.cpp
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@ -139,7 +139,7 @@ bool EventHandler::handle_mousewheel(const Gfx::IntPoint& position, unsigned int
// FIXME: Support wheel events in nested browsing contexts.
auto result = paint_root()->hit_test(position.to_type<float>(), Painting::HitTestType::Exact);
if (result.paintable && result.paintable->handle_mousewheel({}, position, buttons, modifiers, wheel_delta_x, wheel_delta_y))
if (result.has_value() && result->paintable->handle_mousewheel({}, position, buttons, modifiers, wheel_delta_x, wheel_delta_y))
return true;
if (auto* page = m_browsing_context.page()) {
@ -164,8 +164,8 @@ bool EventHandler::handle_mouseup(const Gfx::IntPoint& position, unsigned button
if (m_mouse_event_tracking_layout_node) {
paintable = m_mouse_event_tracking_layout_node->paintable();
} else {
auto result = paint_root()->hit_test(position.to_type<float>(), Painting::HitTestType::Exact);
paintable = result.paintable;
if (auto result = paint_root()->hit_test(position.to_type<float>(), Painting::HitTestType::Exact); result.has_value())
paintable = result->paintable;
}
if (paintable && paintable->wants_mouse_events()) {
@ -175,8 +175,8 @@ bool EventHandler::handle_mouseup(const Gfx::IntPoint& position, unsigned button
// Things may have changed as a consequence of Layout::Node::handle_mouseup(). Hit test again.
if (!paint_root())
return true;
auto result = paint_root()->hit_test(position.to_type<float>(), Painting::HitTestType::Exact);
paintable = result.paintable;
if (auto result = paint_root()->hit_test(position.to_type<float>(), Painting::HitTestType::Exact); result.has_value())
paintable = result->paintable;
}
if (paintable) {
@ -223,9 +223,9 @@ bool EventHandler::handle_mousedown(const Gfx::IntPoint& position, unsigned butt
paintable = m_mouse_event_tracking_layout_node->paintable();
} else {
auto result = paint_root()->hit_test(position.to_type<float>(), Painting::HitTestType::Exact);
if (!result.paintable)
if (!result.has_value())
return false;
paintable = result.paintable;
paintable = result->paintable;
}
auto pointer_events = paintable->computed_values().pointer_events();
@ -301,7 +301,7 @@ bool EventHandler::handle_mousedown(const Gfx::IntPoint& position, unsigned butt
} else {
if (button == GUI::MouseButton::Primary) {
auto result = paint_root()->hit_test(position.to_type<float>(), Painting::HitTestType::TextCursor);
if (result.paintable && result.paintable->layout_node().dom_node()) {
if (result.has_value() && result->paintable->layout_node().dom_node()) {
// See if we want to focus something.
bool did_focus_something = false;
@ -316,8 +316,8 @@ bool EventHandler::handle_mousedown(const Gfx::IntPoint& position, unsigned butt
// If we didn't focus anything, place the document text cursor at the mouse position.
// FIXME: This is all rather strange. Find a better solution.
if (!did_focus_something) {
m_browsing_context.set_cursor_position(DOM::Position(*result.paintable->layout_node().dom_node(), result.index_in_node));
layout_root()->set_selection({ { result.paintable->layout_node(), result.index_in_node }, {} });
m_browsing_context.set_cursor_position(DOM::Position(*result->paintable->layout_node().dom_node(), result->index_in_node));
layout_root()->set_selection({ { result->paintable->layout_node(), result->index_in_node }, {} });
m_in_mouse_selection = true;
}
}
@ -348,9 +348,10 @@ bool EventHandler::handle_mousemove(const Gfx::IntPoint& position, unsigned butt
if (m_mouse_event_tracking_layout_node) {
paintable = m_mouse_event_tracking_layout_node->paintable();
} else {
auto result = paint_root()->hit_test(position.to_type<float>(), Painting::HitTestType::Exact);
paintable = result.paintable;
start_index = result.index_in_node;
if (auto result = paint_root()->hit_test(position.to_type<float>(), Painting::HitTestType::Exact); result.has_value()) {
paintable = result->paintable;
start_index = result->index_in_node;
}
}
const HTML::HTMLAnchorElement* hovered_link_element = nullptr;
@ -409,9 +410,9 @@ bool EventHandler::handle_mousemove(const Gfx::IntPoint& position, unsigned butt
}
if (m_in_mouse_selection) {
auto hit = paint_root()->hit_test(position.to_type<float>(), Painting::HitTestType::TextCursor);
if (start_index.has_value() && hit.paintable && hit.paintable->layout_node().dom_node()) {
m_browsing_context.set_cursor_position(DOM::Position(*hit.paintable->layout_node().dom_node(), *start_index));
layout_root()->set_selection_end({ hit.paintable->layout_node(), hit.index_in_node });
if (start_index.has_value() && hit.has_value() && hit->paintable->layout_node().dom_node()) {
m_browsing_context.set_cursor_position(DOM::Position(*hit->paintable->layout_node().dom_node(), *start_index));
layout_root()->set_selection_end({ hit->paintable->layout_node(), hit->index_in_node });
}
if (auto* page = m_browsing_context.page())
page->client().page_did_change_selection();