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LibWeb: Make Frame point weakly to Page

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This patch makes Page weakable and allows page-less frames to exist.

Page is single-owner, and Frame is multiple-owner, so it's not sound
for Frame to assume its containing Page will stick around for its own
entire lifetime.

Fixes #3976.
This commit is contained in:
Andreas Kling 2020-11-12 18:23:05 +01:00
parent e445ff670d
commit 81add73955
12 changed files with 87 additions and 56 deletions
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60
Libraries/LibWeb/Page/EventHandler.cpp
View file

@ -125,7 +125,6 @@ bool EventHandler::handle_mousedown(const Gfx::IntPoint& position, unsigned butt
}
NonnullRefPtr document = *m_frame.document();
auto& page_client = m_frame.page().client();
auto result = layout_root()->hit_test(position, HitTestType::Exact);
if (!result.layout_node)
@ -148,7 +147,8 @@ bool EventHandler::handle_mousedown(const Gfx::IntPoint& position, unsigned butt
return false;
}
m_frame.page().set_focused_frame({}, m_frame);
if (auto* page = m_frame.page())
page->set_focused_frame({}, m_frame);
auto offset = compute_mouse_event_offset(position, *result.layout_node);
node->dispatch_event(UIEvents::MouseEvent::create("mousedown", offset.x(), offset.y()));
@ -158,7 +158,8 @@ bool EventHandler::handle_mousedown(const Gfx::IntPoint& position, unsigned butt
if (button == GUI::MouseButton::Right && is<HTML::HTMLImageElement>(*node)) {
auto& image_element = downcast<HTML::HTMLImageElement>(*node);
auto image_url = image_element.document().complete_url(image_element.src());
page_client.page_did_request_image_context_menu(m_frame.to_main_frame_position(position), image_url, "", modifiers, image_element.bitmap());
if (auto* page = m_frame.page())
page->client().page_did_request_image_context_menu(m_frame.to_main_frame_position(position), image_url, "", modifiers, image_element.bitmap());
return true;
}
@ -176,16 +177,19 @@ bool EventHandler::handle_mousedown(const Gfx::IntPoint& position, unsigned butt
m_frame.scroll_to_anchor(anchor);
} else {
if (m_frame.is_main_frame()) {
page_client.page_did_click_link(url, link->target(), modifiers);
if (auto* page = m_frame.page())
page->client().page_did_click_link(url, link->target(), modifiers);
} else {
// FIXME: Handle different targets!
m_frame.loader().load(url, FrameLoader::Type::Navigation);
}
}
} else if (button == GUI::MouseButton::Right) {
page_client.page_did_request_link_context_menu(m_frame.to_main_frame_position(position), url, link->target(), modifiers);
if (auto* page = m_frame.page())
page->client().page_did_request_link_context_menu(m_frame.to_main_frame_position(position), url, link->target(), modifiers);
} else if (button == GUI::MouseButton::Middle) {
page_client.page_did_middle_click_link(url, link->target(), modifiers);
if (auto* page = m_frame.page())
page->client().page_did_middle_click_link(url, link->target(), modifiers);
}
} else {
if (button == GUI::MouseButton::Left) {
@ -197,7 +201,8 @@ bool EventHandler::handle_mousedown(const Gfx::IntPoint& position, unsigned butt
m_in_mouse_selection = true;
}
} else if (button == GUI::MouseButton::Right) {
page_client.page_did_request_context_menu(m_frame.to_main_frame_position(position));
if (auto* page = m_frame.page())
page->client().page_did_request_context_menu(m_frame.to_main_frame_position(position));
}
}
return true;
@ -214,7 +219,6 @@ bool EventHandler::handle_mousemove(const Gfx::IntPoint& position, unsigned butt
}
auto& document = *m_frame.document();
auto& page_client = m_frame.page().client();
bool hovered_node_changed = false;
bool is_hovering_link = false;
@ -227,7 +231,8 @@ bool EventHandler::handle_mousemove(const Gfx::IntPoint& position, unsigned butt
document.set_hovered_node(result.layout_node->node());
result.layout_node->handle_mousemove({}, position, buttons, modifiers);
// FIXME: It feels a bit aggressive to always update the cursor like this.
page_client.page_did_request_cursor_change(Gfx::StandardCursor::None);
if (auto* page = m_frame.page())
page->client().page_did_request_cursor_change(Gfx::StandardCursor::None);
return true;
}
@ -262,28 +267,31 @@ bool EventHandler::handle_mousemove(const Gfx::IntPoint& position, unsigned butt
layout_root()->set_selection_end({ hit.layout_node, hit.index_in_node });
}
dump_selection("MouseMove");
page_client.page_did_change_selection();
if (auto* page = m_frame.page())
page->client().page_did_change_selection();
}
}
if (is_hovering_link)
page_client.page_did_request_cursor_change(Gfx::StandardCursor::Hand);
else if (is_hovering_text)
page_client.page_did_request_cursor_change(Gfx::StandardCursor::IBeam);
else
page_client.page_did_request_cursor_change(Gfx::StandardCursor::None);
if (hovered_node_changed) {
RefPtr<HTML::HTMLElement> hovered_html_element = document.hovered_node() ? document.hovered_node()->enclosing_html_element() : nullptr;
if (hovered_html_element && !hovered_html_element->title().is_null()) {
page_client.page_did_enter_tooltip_area(m_frame.to_main_frame_position(position), hovered_html_element->title());
} else {
page_client.page_did_leave_tooltip_area();
}
if (auto* page = m_frame.page()) {
if (is_hovering_link)
page_client.page_did_hover_link(document.complete_url(hovered_link_element->href()));
page->client().page_did_request_cursor_change(Gfx::StandardCursor::Hand);
else if (is_hovering_text)
page->client().page_did_request_cursor_change(Gfx::StandardCursor::IBeam);
else
page_client.page_did_unhover_link();
page->client().page_did_request_cursor_change(Gfx::StandardCursor::None);
if (hovered_node_changed) {
RefPtr<HTML::HTMLElement> hovered_html_element = document.hovered_node() ? document.hovered_node()->enclosing_html_element() : nullptr;
if (hovered_html_element && !hovered_html_element->title().is_null()) {
page->client().page_did_enter_tooltip_area(m_frame.to_main_frame_position(position), hovered_html_element->title());
} else {
page->client().page_did_leave_tooltip_area();
}
if (is_hovering_link)
page->client().page_did_hover_link(document.complete_url(hovered_link_element->href()));
else
page->client().page_did_unhover_link();
}
}
return true;
}

16
Libraries/LibWeb/Page/Frame.cpp
View file

@ -36,7 +36,7 @@
namespace Web {
Frame::Frame(DOM::Element& host_element, Frame& main_frame)
: m_page(main_frame.page())
: m_page(*main_frame.page())
, m_main_frame(main_frame)
, m_loader(*this)
, m_event_handler({}, *this)
@ -72,7 +72,7 @@ void Frame::setup()
bool Frame::is_focused_frame() const
{
return this == &page().focused_frame();
return m_page && &m_page->focused_frame() == this;
}
void Frame::set_document(DOM::Document* document)
@ -89,10 +89,12 @@ void Frame::set_document(DOM::Document* document)
if (m_document) {
m_document->attach_to_frame({}, *this);
page().client().page_did_change_title(m_document->title());
if (m_page)
m_page->client().page_did_change_title(m_document->title());
}
page().client().page_did_set_document_in_main_frame(m_document);
if (m_page)
m_page->client().page_did_set_document_in_main_frame(m_document);
}
void Frame::set_size(const Gfx::IntSize& size)
@ -120,7 +122,8 @@ void Frame::set_needs_display(const Gfx::IntRect& rect)
return;
if (is_main_frame()) {
page().client().page_did_invalidate(to_main_frame_rect(rect));
if (m_page)
m_page->client().page_did_invalidate(to_main_frame_rect(rect));
return;
}
@ -168,7 +171,8 @@ void Frame::scroll_to_anchor(const String& fragment)
float_rect.move_by(-padding_box.left, -padding_box.top);
}
page().client().page_did_request_scroll_into_view(enclosing_int_rect(float_rect));
if (m_page)
m_page->client().page_did_request_scroll_into_view(enclosing_int_rect(float_rect));
}
Gfx::IntRect Frame::to_main_frame_rect(const Gfx::IntRect& a_rect)

6
Libraries/LibWeb/Page/Frame.h
View file

@ -55,8 +55,8 @@ public:
void set_document(DOM::Document*);
Page& page() { return m_page; }
const Page& page() const { return m_page; }
Page* page() { return m_page; }
const Page* page() const { return m_page; }
const Gfx::IntSize& size() const { return m_size; }
void set_size(const Gfx::IntSize&);
@ -100,7 +100,7 @@ private:
void setup();
Page& m_page;
WeakPtr<Page> m_page;
Frame& m_main_frame;
FrameLoader m_loader;

2
Libraries/LibWeb/Page/Page.h
View file

@ -40,7 +40,7 @@ namespace Web {
class PageClient;
class Page {
class Page : public Weakable<Page> {
AK_MAKE_NONCOPYABLE(Page);
AK_MAKE_NONMOVABLE(Page);