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WindowServer: Add basic virtual desktop support

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This creates a 2-dimensional array of WindowStack instances, one for
each virtual desktop. The main desktop 0,0 is the main desktop, which
is the desktop used for all stationary windows (e.g. taskbar, desktop).
When adding windows to a desktop, stationary windows are always added
to the main desktop.

When composing the desktop, there are usually two WindowStacks
involved. For stationary windows, the main desktop will be traversed,
and for everything else the current virtual desktop will be iterated.
Iteration is interweaved to preserve the correct order. During the
transition animation, two WindowStacks will be iterated at the same
time.
This commit is contained in:
Tom 2021-06-29 19:51:26 -06:00 • committed by Andreas Kling
parent 944e5cfb35
commit 584b144953
11 changed files with 900 additions and 213 deletions
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250
Userland/Services/WindowServer/Compositor.cpp
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@ -123,6 +123,9 @@ void Compositor::init_bitmaps()
void Compositor::did_construct_window_manager(Badge<WindowManager>)
{
auto& wm = WindowManager::the();
m_current_window_stack = &wm.current_window_stack();
m_wallpaper_mode = mode_to_enum(wm.config()->read_entry("Background", "Mode", "center"));
m_custom_background_color = Color::from_string(wm.config()->read_entry("Background", "Color", ""));
@ -131,6 +134,17 @@ void Compositor::did_construct_window_manager(Badge<WindowManager>)
compose();
}
Gfx::IntPoint Compositor::window_transition_offset(Window& window)
{
if (WindowManager::is_stationary_window_type(window.type()))
return {};
if (window.is_moving_to_another_stack())
return {};
return window.outer_stack()->transition_offset();
}
void Compositor::compose()
{
auto& wm = WindowManager::the();
@ -158,33 +172,39 @@ void Compositor::compose()
auto dirty_screen_rects = move(m_dirty_screen_rects);
bool window_stack_transition_in_progress = m_transitioning_to_window_stack != nullptr;
// Mark window regions as dirty that need to be re-rendered
wm.window_stack().for_each_visible_window_from_back_to_front([&](Window& window) {
wm.for_each_visible_window_from_back_to_front([&](Window& window) {
auto transition_offset = window_transition_offset(window);
auto frame_rect = window.frame().render_rect();
auto frame_rect_on_screen = frame_rect.translated(transition_offset);
for (auto& dirty_rect : dirty_screen_rects.rects()) {
auto invalidate_rect = dirty_rect.intersected(frame_rect);
auto invalidate_rect = dirty_rect.intersected(frame_rect_on_screen);
if (!invalidate_rect.is_empty()) {
auto inner_rect_offset = window.rect().location() - frame_rect.location();
invalidate_rect.translate_by(-(frame_rect.location() + inner_rect_offset));
invalidate_rect.translate_by(-(frame_rect.location() + inner_rect_offset + transition_offset));
window.invalidate_no_notify(invalidate_rect);
m_invalidated_window = true;
}
}
window.prepare_dirty_rects();
if (window_stack_transition_in_progress)
window.dirty_rects().translate_by(transition_offset);
return IterationDecision::Continue;
});
// Any windows above or below a given window that need to be re-rendered
// also require us to re-render that window's intersecting area, regardless
// of whether that window has any dirty rectangles
wm.window_stack().for_each_visible_window_from_back_to_front([&](Window& window) {
wm.for_each_visible_window_from_back_to_front([&](Window& window) {
auto& transparency_rects = window.transparency_rects();
if (transparency_rects.is_empty())
return IterationDecision::Continue;
auto frame_rect = window.frame().render_rect();
auto& dirty_rects = window.dirty_rects();
wm.window_stack().for_each_visible_window_from_back_to_front([&](Window& w) {
wm.for_each_visible_window_from_back_to_front([&](Window& w) {
if (&w == &window)
return IterationDecision::Continue;
auto frame_rect2 = w.frame().render_rect();
@ -311,8 +331,9 @@ void Compositor::compose()
// This window doesn't intersect with any screens, so there's nothing to render
return IterationDecision::Continue;
}
auto frame_rect = window.frame().render_rect();
auto window_rect = window.rect();
auto transition_offset = window_transition_offset(window);
auto frame_rect = window.frame().render_rect().translated(transition_offset);
auto window_rect = window.rect().translated(transition_offset);
auto frame_rects = frame_rect.shatter(window_rect);
dbgln_if(COMPOSE_DEBUG, " window {} frame rect: {}", window.title(), frame_rect);
@ -323,8 +344,9 @@ void Compositor::compose()
rect.for_each_intersected(frame_rects, [&](const Gfx::IntRect& intersected_rect) {
Gfx::PainterStateSaver saver(painter);
painter.add_clip_rect(intersected_rect);
painter.translate(transition_offset);
dbgln_if(COMPOSE_DEBUG, " render frame: {}", intersected_rect);
window.frame().paint(screen, painter, intersected_rect);
window.frame().paint(screen, painter, intersected_rect.translated(-transition_offset));
return IterationDecision::Continue;
});
}
@ -481,7 +503,7 @@ void Compositor::compose()
compose_window(*fullscreen_window);
fullscreen_window->clear_dirty_rects();
} else {
wm.window_stack().for_each_visible_window_from_back_to_front([&](Window& window) {
wm.for_each_visible_window_from_back_to_front([&](Window& window) {
compose_window(window);
window.clear_dirty_rects();
return IterationDecision::Continue;
@ -899,11 +921,14 @@ void Compositor::decrement_show_screen_number(Badge<ClientConnection>)
}
}
bool Compositor::any_opaque_window_above_this_one_contains_rect(const Window& a_window, const Gfx::IntRect& rect)
bool Compositor::any_opaque_window_above_this_one_contains_rect(Window& a_window, const Gfx::IntRect& rect)
{
auto* window_stack = a_window.outer_stack();
if (!window_stack)
return false;
bool found_containing_window = false;
bool checking = false;
WindowManager::the().window_stack().for_each_visible_window_from_back_to_front([&](Window& window) {
WindowManager::the().for_each_visible_window_from_back_to_front([&](Window& window) {
if (&window == &a_window) {
checking = true;
return IterationDecision::Continue;
@ -942,6 +967,7 @@ void Compositor::overlay_rects_changed()
invalidate_occlusions();
for (auto& rect : m_overlay_rects.rects())
invalidate_screen(rect);
start_compose_async_timer();
}
void Compositor::recompute_overlay_rects()
@ -973,17 +999,20 @@ void Compositor::recompute_overlay_rects()
void Compositor::recompute_occlusions()
{
auto& wm = WindowManager::the();
wm.window_stack().for_each_visible_window_from_back_to_front([&](Window& window) {
if (wm.m_switcher.is_visible()) {
window.set_occluded(false);
} else {
bool is_switcher_visible = wm.m_switcher.is_visible();
wm.for_each_window_stack([&](WindowStack& window_stack) {
window_stack.set_all_occluded(!is_switcher_visible);
return IterationDecision::Continue;
});
if (!is_switcher_visible) {
wm.for_each_visible_window_from_back_to_front([&](Window& window) {
if (any_opaque_window_above_this_one_contains_rect(window, window.frame().rect()))
window.set_occluded(true);
else
window.set_occluded(false);
}
return IterationDecision::Continue;
});
return IterationDecision::Continue;
});
}
if (m_overlay_rects_changed) {
m_overlay_rects_changed = false;
@ -996,11 +1025,12 @@ void Compositor::recompute_occlusions()
dbgln(" overlay: {}", rect);
}
bool window_stack_transition_in_progress = m_transitioning_to_window_stack != nullptr;
auto& main_screen = Screen::main();
if (auto* fullscreen_window = wm.active_fullscreen_window()) {
// TODO: support fullscreen windows on all screens
auto screen_rect = main_screen.rect();
WindowManager::the().window_stack().for_each_visible_window_from_front_to_back([&](Window& w) {
wm.for_each_visible_window_from_front_to_back([&](Window& w) {
auto& visible_opaque = w.opaque_rects();
auto& transparency_rects = w.transparency_rects();
auto& transparency_wallpaper_rects = w.transparency_wallpaper_rects();
@ -1029,7 +1059,7 @@ void Compositor::recompute_occlusions()
Gfx::DisjointRectSet visible_rects;
visible_rects.add_many(Screen::rects());
bool have_transparent = false;
WindowManager::the().window_stack().for_each_visible_window_from_front_to_back([&](Window& w) {
wm.for_each_visible_window_from_front_to_back([&](Window& w) {
w.transparency_wallpaper_rects().clear();
auto& visible_opaque = w.opaque_rects();
visible_opaque.clear();
@ -1039,8 +1069,13 @@ void Compositor::recompute_occlusions()
if (w.is_minimized())
return IterationDecision::Continue;
auto transition_offset = window_transition_offset(w);
auto transparent_frame_render_rects = w.frame().transparent_render_rects();
auto opaque_frame_render_rects = w.frame().opaque_render_rects();
if (window_stack_transition_in_progress) {
transparent_frame_render_rects.translate_by(transition_offset);
opaque_frame_render_rects.translate_by(transition_offset);
}
Gfx::DisjointRectSet visible_opaque_rects;
Screen::for_each([&](auto& screen) {
auto screen_rect = screen.rect();
@ -1061,10 +1096,12 @@ void Compositor::recompute_occlusions()
visible_opaque = visible_rects.intersected(visible_opaque_rects);
auto render_rect = w.frame().render_rect();
auto render_rect_on_screen = render_rect;
if (window_stack_transition_in_progress)
render_rect_on_screen.translate_by(transition_offset);
Gfx::DisjointRectSet opaque_covering;
bool found_this_window = false;
WindowManager::the().window_stack().for_each_visible_window_from_back_to_front([&](Window& w2) {
wm.for_each_visible_window_from_back_to_front([&](Window& w2) {
if (!found_this_window) {
if (&w == &w2)
found_this_window = true;
@ -1074,17 +1111,28 @@ void Compositor::recompute_occlusions()
if (w2.is_minimized())
return IterationDecision::Continue;
if (!render_rect.intersects(w2.frame().render_rect()))
auto w2_render_rect = w2.frame().render_rect();
auto w2_render_rect_on_screen = w2_render_rect;
auto w2_transition_offset = window_transition_offset(w2);
if (window_stack_transition_in_progress)
w2_render_rect_on_screen.translate_by(w2_transition_offset);
if (!render_rect_on_screen.intersects(w2_render_rect_on_screen))
return IterationDecision::Continue;
auto opaque_rects = w2.frame().opaque_render_rects().intersected(render_rect);
auto transparent_rects = w2.frame().transparent_render_rects().intersected(render_rect);
auto opaque_rects = w2.frame().opaque_render_rects();
auto transparent_rects = w2.frame().transparent_render_rects();
if (window_stack_transition_in_progress) {
auto transition_offset_2 = window_transition_offset(w2);
opaque_rects.translate_by(transition_offset_2);
transparent_rects.translate_by(transition_offset_2);
}
opaque_rects = opaque_rects.intersected(render_rect_on_screen);
transparent_rects = transparent_rects.intersected(render_rect_on_screen);
if (opaque_rects.is_empty() && transparent_rects.is_empty())
return IterationDecision::Continue;
for (auto& covering : opaque_rects.rects()) {
opaque_covering.add(covering);
if (opaque_covering.contains(render_rect)) {
if (opaque_covering.contains(render_rect_on_screen)) {
// This window (including frame) is entirely covered by another opaque window
visible_opaque.clear();
transparency_rects.clear();
@ -1156,7 +1204,7 @@ void Compositor::recompute_occlusions()
if (have_transparent) {
// Determine what transparent window areas need to render the wallpaper first
WindowManager::the().window_stack().for_each_visible_window_from_back_to_front([&](Window& w) {
wm.for_each_visible_window_from_back_to_front([&](Window& w) {
auto& transparency_wallpaper_rects = w.transparency_wallpaper_rects();
if (w.is_minimized()) {
transparency_wallpaper_rects.clear();
@ -1184,7 +1232,7 @@ void Compositor::recompute_occlusions()
dbgln(" wallpaper opaque: {}", r);
}
wm.window_stack().for_each_visible_window_from_back_to_front([&](Window& w) {
wm.for_each_visible_window_from_back_to_front([&](Window& w) {
auto window_frame_rect = w.frame().render_rect();
if (w.is_minimized() || window_frame_rect.is_empty() || w.screens().is_empty())
return IterationDecision::Continue;
@ -1237,4 +1285,148 @@ void Compositor::update_animations(Screen& screen, Gfx::DisjointRectSet& flush_r
}
}
void Compositor::create_window_stack_switch_overlay(WindowStack& target_stack)
{
if (m_stack_switch_overlay_timer) {
// Cancel any timer, we're going to delete the overlay
m_stack_switch_overlay_timer->stop();
m_stack_switch_overlay_timer = nullptr;
}
Screen::for_each([&](auto& screen) {
auto& screen_data = m_screen_data[screen.index()];
screen_data.m_window_stack_switch_overlay = nullptr; // delete it first
screen_data.m_window_stack_switch_overlay = create_overlay<WindowStackSwitchOverlay>(screen, target_stack);
screen_data.m_window_stack_switch_overlay->set_enabled(true);
return IterationDecision::Continue;
});
}
void Compositor::start_window_stack_switch_overlay_timer()
{
if (m_stack_switch_overlay_timer) {
m_stack_switch_overlay_timer->stop();
m_stack_switch_overlay_timer = nullptr;
}
m_stack_switch_overlay_timer = Core::Timer::create_single_shot(
500,
[this] {
Screen::for_each([&](auto& screen) {
auto& screen_data = m_screen_data[screen.index()];
screen_data.m_window_stack_switch_overlay = nullptr;
return IterationDecision::Continue;
});
},
this);
m_stack_switch_overlay_timer->start();
}
void Compositor::finish_window_stack_switch()
{
VERIFY(m_transitioning_to_window_stack);
VERIFY(m_current_window_stack);
VERIFY(m_transitioning_to_window_stack != m_current_window_stack);
m_current_window_stack->set_transition_offset({}, {});
m_transitioning_to_window_stack->set_transition_offset({}, {});
auto* previous_window_stack = m_current_window_stack;
m_current_window_stack = m_transitioning_to_window_stack;
m_transitioning_to_window_stack = nullptr;
m_window_stack_transition_animation = nullptr;
auto& wm = WindowManager::the();
if (!wm.m_switcher.is_visible())
previous_window_stack->set_all_occluded(true);
wm.did_switch_window_stack({}, *previous_window_stack, *m_current_window_stack);
invalidate_occlusions();
// Rather than invalidating the entire we could invalidate all render rectangles
// that are affected by the transition offset before and after changing it.
invalidate_screen();
start_window_stack_switch_overlay_timer();
}
void Compositor::switch_to_window_stack(WindowStack& new_window_stack)
{
if (m_transitioning_to_window_stack) {
if (m_transitioning_to_window_stack == &new_window_stack)
return;
// A switch is in progress, but the user is impatient. Finish the transition instantly
finish_window_stack_switch();
VERIFY(!m_window_stack_transition_animation);
// Now switch to the next target as usual
}
VERIFY(m_current_window_stack);
if (&new_window_stack == m_current_window_stack) {
// So that the user knows which stack they're on, show the overlay briefly
create_window_stack_switch_overlay(*m_current_window_stack);
start_window_stack_switch_overlay_timer();
return;
}
VERIFY(!m_transitioning_to_window_stack);
m_transitioning_to_window_stack = &new_window_stack;
auto window_stack_size = Screen::bounding_rect().size();
int delta_x = 0;
if (new_window_stack.column() < m_current_window_stack->column())
delta_x = window_stack_size.width();
else if (new_window_stack.column() > m_current_window_stack->column())
delta_x = -window_stack_size.width();
int delta_y = 0;
if (new_window_stack.row() < m_current_window_stack->row())
delta_y = window_stack_size.height();
else if (new_window_stack.row() > m_current_window_stack->row()) {
delta_y = -window_stack_size.height();
}
m_transitioning_to_window_stack->set_transition_offset({}, { -delta_x, -delta_y });
m_current_window_stack->set_transition_offset({}, {});
create_window_stack_switch_overlay(*m_transitioning_to_window_stack);
// We start the timer when the animation ends!
VERIFY(!m_window_stack_transition_animation);
m_window_stack_transition_animation = Animation::create();
m_window_stack_transition_animation->set_duration(250);
m_window_stack_transition_animation->on_update = [this, delta_x, delta_y](float progress, Gfx::Painter&, Screen&, Gfx::DisjointRectSet&) {
VERIFY(m_transitioning_to_window_stack);
VERIFY(m_current_window_stack);
// Set transition offset for the window stack we're transitioning out of
auto previous_transition_offset_from = m_current_window_stack->transition_offset();
Gfx::IntPoint transition_offset_from { (float)delta_x * progress, (float)delta_y * progress };
if (previous_transition_offset_from == transition_offset_from)
return;
{
// we need to render both, the existing dirty rectangles as well as where we're shifting to
auto translated_dirty_rects = m_dirty_screen_rects.clone();
auto transition_delta = transition_offset_from - previous_transition_offset_from;
translated_dirty_rects.translate_by(transition_delta);
m_dirty_screen_rects.add(translated_dirty_rects.intersected(Screen::bounding_rect()));
}
m_current_window_stack->set_transition_offset({}, transition_offset_from);
// Set transition offset for the window stack we're transitioning to
Gfx::IntPoint transition_offset_to { (float)-delta_x * (1.0f - progress), (float)-delta_y * (1.0f - progress) };
m_transitioning_to_window_stack->set_transition_offset({}, transition_offset_to);
invalidate_occlusions();
// Rather than invalidating the entire we could invalidate all render rectangles
// that are affected by the transition offset before and after changing it.
invalidate_screen();
};
m_window_stack_transition_animation->on_stop = [this] {
finish_window_stack_switch();
};
m_window_stack_transition_animation->start();
}
}