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WindowServer: Replace modal stacks with modal chains

Browse source 
And apply modal effects on move_to_front_and_make_active()

Instead of building a vector of windows every time we want to
loop over a group of related modals, simply recurse through
their ancestory. This lineage is now called a modal chain. Modal
chains begin at the first modeless parent, and a new chain
starts at every modeless child. This lets apps spawn child windows
independent of the main window's modal effects, restore state,
and workspace, yet still remain descendants.

Looping through a modal chain is recursive and includes the
modeless window which begins it.
This commit is contained in:
thankyouverycool 2022-08-22 14:29:33 -04:00 • committed by Andreas Kling
parent 4c7f95e2f8
commit 788b16cbf8
3 changed files with 55 additions and 72 deletions
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18
Userland/Services/WindowServer/Window.cpp
View file

@ -679,18 +679,12 @@ bool Window::is_active() const
Window* Window::blocking_modal_window()
{
// A window is blocked if any immediate child, or any child further
// down the chain is modal
for (auto& window : m_child_windows) {
if (window && !window->is_destroyed()) {
if (window->is_modal())
return window;
if (auto* blocking_window = window->blocking_modal_window())
return blocking_window;
}
}
return nullptr;
auto maybe_blocker = WindowManager::the().for_each_window_in_modal_chain(*this, [&](auto& window) {
if (window.is_blocking() && this != &window)
return IterationDecision::Break;
return IterationDecision::Continue;
});
return maybe_blocker;
}
void Window::set_default_icon()

59
Userland/Services/WindowServer/WindowManager.cpp
View file

@ -342,23 +342,22 @@ void WindowManager::add_window(Window& window)
void WindowManager::move_to_front_and_make_active(Window& window)
{
auto move_window_to_front = [&](Window& wnd, bool make_active, bool make_input) {
do_move_to_front(wnd, make_active, make_input);
};
for_each_window_in_modal_stack(window, [&](auto& w, bool is_stack_top) {
move_window_to_front(w, is_stack_top, is_stack_top);
return IterationDecision::Continue;
});
Compositor::the().invalidate_occlusions();
}
void WindowManager::do_move_to_front(Window& window, bool make_active, bool make_input)
{
if (auto* blocker = window.blocking_modal_window()) {
blocker->window_stack().move_to_front(*blocker);
set_active_window(blocker, true);
} else {
window.window_stack().move_to_front(window);
set_active_window(&window, true);
if (make_active)
set_active_window(&window, make_input);
for (auto& child : window.child_windows()) {
if (!child || !child->is_modal())
continue;
if (child->is_rendering_above())
child->window_stack().move_to_front(*child);
if (child->is_capturing_input())
set_active_input_window(child);
}
}
if (m_switcher->is_visible()) {
m_switcher->refresh();
@ -368,10 +367,7 @@ void WindowManager::do_move_to_front(Window& window, bool make_active, bool make
}
}
for (auto& child_window : window.child_windows()) {
if (child_window)
do_move_to_front(*child_window, make_active, make_input);
}
Compositor::the().invalidate_occlusions();
}
void WindowManager::remove_window(Window& window)
@ -1438,14 +1434,14 @@ void WindowManager::event(Core::Event& event)
Core::Object::event(event);
}
bool WindowManager::is_window_in_modal_stack(Window& window_in_modal_stack, Window& other_window)
bool WindowManager::is_window_in_modal_chain(Window& chain_window, Window& other_window)
{
auto result = for_each_window_in_modal_stack(window_in_modal_stack, [&](auto& window, auto) {
auto result = for_each_window_in_modal_chain(chain_window, [&](auto& window) {
if (&other_window == &window)
return IterationDecision::Break;
return IterationDecision::Continue;
});
return result == IterationDecision::Break;
return result;
}
void WindowManager::switch_to_window_stack(WindowStack& window_stack, Window* carry_window, bool show_overlay)
@ -1455,14 +1451,13 @@ void WindowManager::switch_to_window_stack(WindowStack& window_stack, Window* ca
if (carry_window && !is_stationary_window_type(carry_window->type()) && &carry_window->window_stack() != &window_stack) {
auto& from_stack = carry_window->window_stack();
auto* blocking_modal = carry_window->blocking_modal_window();
for_each_visible_window_from_back_to_front([&](Window& window) {
if (is_stationary_window_type(window.type()))
return IterationDecision::Continue;
if (&window.window_stack() != &carry_window->window_stack())
return IterationDecision::Continue;
if (&window == carry_window || ((carry_window->is_modal() || blocking_modal) && is_window_in_modal_stack(*carry_window, window)))
if (&window == carry_window || is_window_in_modal_chain(*carry_window, window))
m_carry_window_to_new_stack.append(window);
return IterationDecision::Continue;
},
@ -2131,7 +2126,7 @@ void WindowManager::did_popup_a_menu(Badge<Menu>)
void WindowManager::minimize_windows(Window& window, bool minimized)
{
for_each_window_in_modal_stack(window, [&](auto& w, bool) {
for_each_window_in_modal_chain(window, [&](auto& w) {
w.set_minimized(minimized);
return IterationDecision::Continue;
});
@ -2139,21 +2134,21 @@ void WindowManager::minimize_windows(Window& window, bool minimized)
void WindowManager::hide_windows(Window& window, bool hidden)
{
for_each_window_in_modal_stack(window, [&](auto& w, bool) {
for_each_window_in_modal_chain(window, [&](auto& w) {
w.set_hidden(hidden);
if (!hidden)
pick_new_active_window(&window);
return IterationDecision::Continue;
});
}
void WindowManager::maximize_windows(Window& window, bool maximized)
{
for_each_window_in_modal_stack(window, [&](auto& w, bool stack_top) {
if (stack_top)
w.set_maximized(maximized);
for_each_window_in_modal_chain(window, [&](auto& w) {
if (&window == &w) {
window.set_maximized(maximized);
return IterationDecision::Continue;
}
if (w.is_minimized())
w.set_minimized(false);
return IterationDecision::Continue;
@ -2162,7 +2157,7 @@ void WindowManager::maximize_windows(Window& window, bool maximized)
void WindowManager::set_always_on_top(Window& window, bool always_on_top)
{
for_each_window_in_modal_stack(window, [&](auto& w, bool) {
for_each_window_in_modal_chain(window, [&](auto& w) {
w.set_always_on_top(always_on_top);
return IterationDecision::Continue;
});

48
Userland/Services/WindowServer/WindowManager.h
View file

@ -238,35 +238,31 @@ public:
void maximize_windows(Window&, bool);
void set_always_on_top(Window&, bool);
template<typename Function>
IterationDecision for_each_window_in_modal_stack(Window& window, Function f)
template<typename Callback>
Window* for_each_window_in_modal_chain(Window& window, Callback callback)
{
auto* blocking_modal_window = window.blocking_modal_window();
if (blocking_modal_window || window.is_modal()) {
Vector<Window&> modal_stack;
auto* modal_stack_top = blocking_modal_window ? blocking_modal_window : &window;
for (auto* parent = modal_stack_top->parent_window(); parent; parent = parent->parent_window()) {
auto* blocked_by = parent->blocking_modal_window();
if (!blocked_by || (blocked_by != modal_stack_top && !modal_stack_top->is_descendant_of(*blocked_by)))
break;
modal_stack.append(*parent);
if (!parent->is_modal())
break;
Window* maybe_break = nullptr;
Function<Window*(Window&)> recurse = [&](Window& w) -> Window* {
if (!w.is_modal()) {
auto decision = callback(w);
if (decision == IterationDecision::Break)
return maybe_break = &w;
}
if (!modal_stack.is_empty()) {
for (size_t i = modal_stack.size(); i > 0; i--) {
IterationDecision decision = f(modal_stack[i - 1], false);
if (decision != IterationDecision::Continue)
return decision;
for (auto& child : w.child_windows()) {
if (!child || child->is_destroyed() || !child->is_modal())
continue;
auto decision = callback(*child);
if (decision == IterationDecision::Break)
return maybe_break = child;
recurse(*child);
}
return maybe_break;
};
if (auto* modeless = window.modeless_ancestor(); modeless)
return recurse(*modeless);
return nullptr;
}
return f(*modal_stack_top, true);
} else {
// Not a modal window stack, just "iterate" over this window
return f(window, true);
}
}
bool is_window_in_modal_stack(Window& window_in_modal_stack, Window& other_window);
bool is_window_in_modal_chain(Window& chain_window, Window& other_window);
Gfx::IntPoint get_recommended_window_position(Gfx::IntPoint const& desired);
@ -376,8 +372,6 @@ private:
void tell_wm_about_current_window_stack(WMConnectionFromClient&);
bool pick_new_active_window(Window*);
void do_move_to_front(Window&, bool, bool);
bool sync_config_to_disk();
[[nodiscard]] static WindowStack& get_rendering_window_stacks(WindowStack*&);