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ladybird/Userland/Services/WindowServer/WindowManager.cpp
Ben Wiederhake c6e56612f5 LibGUI+WindowServer: Remove now-obsolete cursor tracking feature 
This feature was problematic for several reasons:
- Tracking *all* the user activity seems like a privacy nightmare.
- LibGUI actually only supports one globally tracking widget per window,
  even if no window is necessary, or if multiple callbacks are desired.
- Widgets can easily get confused whether an event is actually directed
  at it, or is actually just the result of global tracking.

The third item caused an issue where right-clicking CatDog opened two
context menus instead of one.
2021-09-08 10:53:49 +02:00

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/*
* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "WindowManager.h"
#include "Compositor.h"
#include "EventLoop.h"
#include "Menu.h"
#include "Screen.h"
#include "Window.h"
#include <AK/Debug.h>
#include <AK/StdLibExtras.h>
#include <AK/Vector.h>
#include <LibGfx/Bitmap.h>
#include <LibGfx/CharacterBitmap.h>
#include <LibGfx/Font.h>
#include <LibGfx/StylePainter.h>
#include <LibGfx/SystemTheme.h>
#include <WindowServer/AppletManager.h>
#include <WindowServer/Button.h>
#include <WindowServer/ClientConnection.h>
#include <WindowServer/Cursor.h>
#include <WindowServer/WindowClientEndpoint.h>
namespace WindowServer {
static WindowManager* s_the;
WindowManager& WindowManager::the()
{
VERIFY(s_the);
return *s_the;
}
WindowManager::WindowManager(Gfx::PaletteImpl const& palette)
: m_palette(palette)
{
s_the = this;
{
// If we haven't created any window stacks, at least create the stationary/main window stack
auto row = adopt_own(*new RemoveReference<decltype(m_window_stacks[0])>());
auto main_window_stack = adopt_own(*new WindowStack(0, 0));
main_window_stack->set_stationary_window_stack(*main_window_stack);
m_current_window_stack = main_window_stack.ptr();
row->append(move(main_window_stack));
m_window_stacks.append(move(row));
}
reload_config();
Compositor::the().did_construct_window_manager({});
}
WindowManager::~WindowManager()
{
}
void WindowManager::reload_config()
{
m_config = Core::ConfigFile::open("/etc/WindowServer.ini", Core::ConfigFile::AllowWriting::Yes);
unsigned virtual_desktop_rows = (unsigned)m_config->read_num_entry("VirtualDesktop", "Rows", default_window_stack_rows);
unsigned virtual_desktop_columns = (unsigned)m_config->read_num_entry("VirtualDesktop", "Columns", default_window_stack_columns);
if (virtual_desktop_rows == 0 || virtual_desktop_columns == 0 || virtual_desktop_rows > max_window_stack_rows || virtual_desktop_columns > max_window_stack_columns) {
virtual_desktop_rows = default_window_stack_rows;
virtual_desktop_columns = default_window_stack_columns;
}
apply_virtual_desktop_settings(virtual_desktop_rows, virtual_desktop_columns, false);
m_double_click_speed = m_config->read_num_entry("Input", "DoubleClickSpeed", 250);
apply_cursor_theme(m_config->read_entry("Mouse", "CursorTheme", "Default"));
auto reload_graphic = [&](RefPtr<MultiScaleBitmaps>& bitmap, String const& name) {
if (bitmap) {
if (!bitmap->load(name))
bitmap = nullptr;
} else {
bitmap = MultiScaleBitmaps::create(name);
}
};
reload_graphic(m_overlay_rect_shadow, m_config->read_entry("Graphics", "OverlayRectShadow"));
Compositor::the().invalidate_after_theme_or_font_change();
WindowFrame::reload_config();
}
Gfx::Font const& WindowManager::font() const
{
return Gfx::FontDatabase::default_font();
}
Gfx::Font const& WindowManager::window_title_font() const
{
return Gfx::FontDatabase::default_font().bold_variant();
}
bool WindowManager::set_screen_layout(ScreenLayout&& screen_layout, bool save, String& error_msg)
{
if (!Screen::apply_layout(move(screen_layout), error_msg))
return false;
reload_icon_bitmaps_after_scale_change();
Compositor::the().screen_resolution_changed();
tell_wms_screen_rects_changed();
for_each_window_stack([&](auto& window_stack) {
window_stack.for_each_window([](Window& window) {
window.screens().clear_with_capacity();
window.recalculate_rect();
return IterationDecision::Continue;
});
return IterationDecision::Continue;
});
if (save)
Screen::layout().save_config(*m_config);
return true;
}
ScreenLayout WindowManager::get_screen_layout() const
{
return Screen::layout();
}
bool WindowManager::save_screen_layout(String& error_msg)
{
if (!Screen::layout().save_config(*m_config)) {
error_msg = "Could not save";
return false;
}
return true;
}
bool WindowManager::apply_virtual_desktop_settings(unsigned rows, unsigned columns, bool save)
{
VERIFY(rows != 0);
VERIFY(rows <= max_window_stack_rows);
VERIFY(columns != 0);
VERIFY(columns <= max_window_stack_columns);
auto current_rows = window_stack_rows();
auto current_columns = window_stack_columns();
if (rows != current_rows || columns != current_columns) {
auto& current_window_stack = this->current_window_stack();
auto current_stack_row = current_window_stack.row();
auto current_stack_column = current_window_stack.column();
bool need_rerender = false;
bool removing_current_stack = current_stack_row > rows - 1 || current_stack_column > columns - 1;
auto new_current_row = min(current_stack_row, rows - 1);
auto new_current_column = min(current_stack_column, columns - 1);
// Collect all windows that were moved. We can't tell the wms at this point because
// the current window stack may not be valid anymore, until after the move is complete
Vector<Window*, 32> windows_moved;
auto merge_window_stack = [&](WindowStack& from_stack, WindowStack& into_stack) {
auto move_to = WindowStack::MoveAllWindowsTo::Back;
// TODO: Figure out a better algorithm. We basically always layer it on top, unless
// it's either being moved to window stack we're viewing or that we will be viewing.
// In that case we would want to make sure the window stack ends up on top (with no
// change to the active window)
bool moving_to_new_current_stack = into_stack.row() == new_current_row && into_stack.column() == new_current_column;
if (moving_to_new_current_stack)
move_to = WindowStack::MoveAllWindowsTo::Front;
from_stack.move_all_windows(into_stack, windows_moved, move_to);
};
// While we have too many rows, merge each row too many into the new bottom row
while (current_rows > rows) {
auto& row = m_window_stacks[rows];
for (size_t column_index = 0; column_index < row.size(); column_index++) {
merge_window_stack(row[column_index], m_window_stacks[rows - 1][column_index]);
if (rows - 1 == current_stack_row && column_index == current_stack_column)
need_rerender = true;
}
m_window_stacks.remove(rows);
current_rows--;
}
// While we have too many columns, merge each column too many into the new right most column
while (current_columns > columns) {
for (size_t row_index = 0; row_index < current_rows; row_index++) {
auto& row = m_window_stacks[row_index];
merge_window_stack(row[columns], row[columns - 1]);
if (row_index == current_stack_row && columns - 1 == current_stack_column)
need_rerender = true;
row.remove(columns);
}
current_columns--;
}
// Add more rows if necessary
while (rows > current_rows) {
auto row = adopt_own(*new RemoveReference<decltype(m_window_stacks[0])>());
for (size_t column_index = 0; column_index < columns; column_index++) {
auto window_stack = adopt_own(*new WindowStack(current_rows, column_index));
window_stack->set_stationary_window_stack(m_window_stacks[0][0]);
row->append(move(window_stack));
}
m_window_stacks.append(move(row));
current_rows++;
}
// Add more columns if necessary
while (columns > current_columns) {
for (size_t row_index = 0; row_index < current_rows; row_index++) {
auto& row = m_window_stacks[row_index];
while (row.size() < columns) {
auto window_stack = adopt_own(*new WindowStack(row_index, row.size()));
window_stack->set_stationary_window_stack(m_window_stacks[0][0]);
row.append(move(window_stack));
}
}
current_columns++;
}
if (removing_current_stack) {
// If we're on a window stack that was removed, we need to move...
m_current_window_stack = &m_window_stacks[new_current_row][new_current_column];
Compositor::the().set_current_window_stack_no_transition(*m_current_window_stack);
need_rerender = false; // The compositor already called invalidate_for_window_stack_merge_or_change for us
}
for (auto* window_moved : windows_moved)
WindowManager::the().tell_wms_window_state_changed(*window_moved);
tell_wms_screen_rects_changed(); // updates the available virtual desktops
if (current_stack_row != new_current_row || current_stack_column != new_current_column)
tell_wms_current_window_stack_changed();
if (need_rerender)
Compositor::the().invalidate_for_window_stack_merge_or_change();
}
if (save) {
m_config->write_num_entry("VirtualDesktop", "Rows", window_stack_rows());
m_config->write_num_entry("VirtualDesktop", "Columns", window_stack_columns());
return m_config->sync();
}
return true;
}
void WindowManager::set_acceleration_factor(double factor)
{
ScreenInput::the().set_acceleration_factor(factor);
dbgln("Saving acceleration factor {} to config file at {}", factor, m_config->filename());
m_config->write_entry("Mouse", "AccelerationFactor", String::formatted("{}", factor));
m_config->sync();
}
void WindowManager::set_scroll_step_size(unsigned step_size)
{
ScreenInput::the().set_scroll_step_size(step_size);
dbgln("Saving scroll step size {} to config file at {}", step_size, m_config->filename());
m_config->write_entry("Mouse", "ScrollStepSize", String::number(step_size));
m_config->sync();
}
void WindowManager::set_double_click_speed(int speed)
{
VERIFY(speed >= double_click_speed_min && speed <= double_click_speed_max);
m_double_click_speed = speed;
dbgln("Saving double-click speed {} to config file at {}", speed, m_config->filename());
m_config->write_entry("Input", "DoubleClickSpeed", String::number(speed));
m_config->sync();
}
int WindowManager::double_click_speed() const
{
return m_double_click_speed;
}
WindowStack& WindowManager::window_stack_for_window(Window& window)
{
if (is_stationary_window_type(window.type()))
return m_window_stacks[0][0];
if (auto* parent = window.parent_window(); parent && !is_stationary_window_type(parent->type()))
return parent->window_stack();
return current_window_stack();
}
void WindowManager::add_window(Window& window)
{
auto& window_stack = window_stack_for_window(window);
bool is_first_window = window_stack.is_empty();
window_stack.add(window);
if (window.is_fullscreen()) {
auto& screen = Screen::main(); // TODO: support fullscreen windows on other screens!
Core::EventLoop::current().post_event(window, make<ResizeEvent>(screen.rect()));
window.set_rect(screen.rect());
}
if (window.type() != WindowType::Desktop || is_first_window)
set_active_window(&window);
if (m_switcher.is_visible() && window.type() != WindowType::WindowSwitcher)
m_switcher.refresh();
Compositor::the().invalidate_occlusions();
window.invalidate(true, true);
tell_wms_window_state_changed(window);
}
void WindowManager::move_to_front_and_make_active(Window& window)
{
auto move_window_to_front = [&](Window& wnd, bool make_active, bool make_input) {
if (wnd.is_accessory()) {
auto* parent = wnd.parent_window();
do_move_to_front(*parent, true, false);
make_active = false;
for (auto& accessory_window : parent->accessory_windows()) {
if (accessory_window && accessory_window.ptr() != &wnd)
do_move_to_front(*accessory_window, false, false);
}
}
do_move_to_front(wnd, make_active, make_input);
};
// If a window that is currently blocked by a modal child is being
// brought to the front, bring the entire stack of modal windows
// to the front and activate the modal window. Also set the
// active input window to that same window (which would pull
// active input from any accessory window)
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)
{
window.window_stack().move_to_front(window);
if (make_active)
set_active_window(&window, make_input);
if (m_switcher.is_visible()) {
m_switcher.refresh();
if (!window.is_accessory()) {
m_switcher.select_window(window);
set_highlight_window(&window);
}
}
for (auto& child_window : window.child_windows()) {
if (child_window)
do_move_to_front(*child_window, make_active, make_input);
}
}
void WindowManager::remove_window(Window& window)
{
check_hide_geometry_overlay(window);
auto* active = active_window();
auto* active_input = active_input_window();
bool was_modal = window.is_modal(); // This requires the window to be on a window stack still!
window.window_stack().remove(window);
if (active == &window || active_input == &window || (active && window.is_descendant_of(*active)) || (active_input && active_input != active && window.is_descendant_of(*active_input)))
pick_new_active_window(&window);
window.invalidate_last_rendered_screen_rects_now();
if (m_switcher.is_visible() && window.type() != WindowType::WindowSwitcher)
m_switcher.refresh();
Compositor::the().invalidate_occlusions();
for_each_window_manager([&](WMClientConnection& conn) {
if (conn.window_id() < 0 || !(conn.event_mask() & WMEventMask::WindowRemovals))
return IterationDecision::Continue;
if (!window.is_internal() && !was_modal)
conn.async_window_removed(conn.window_id(), window.client_id(), window.window_id());
return IterationDecision::Continue;
});
}
void WindowManager::greet_window_manager(WMClientConnection& conn)
{
if (conn.window_id() < 0)
return;
tell_wm_about_current_window_stack(conn);
for_each_window_stack([&](auto& window_stack) {
window_stack.for_each_window([&](Window& other_window) {
//if (conn.window_id() != other_window.window_id()) {
tell_wm_about_window(conn, other_window);
tell_wm_about_window_icon(conn, other_window);
//}
return IterationDecision::Continue;
});
return IterationDecision::Continue;
});
if (auto* applet_area_window = AppletManager::the().window())
tell_wms_applet_area_size_changed(applet_area_window->size());
}
void WindowManager::tell_wm_about_window(WMClientConnection& conn, Window& window)
{
if (conn.window_id() < 0)
return;
if (!(conn.event_mask() & WMEventMask::WindowStateChanges))
return;
if (window.is_internal())
return;
auto* parent = window.parent_window();
auto& window_stack = is_stationary_window_type(window.type()) ? current_window_stack() : window.window_stack();
conn.async_window_state_changed(conn.window_id(), window.client_id(), window.window_id(), parent ? parent->client_id() : -1, parent ? parent->window_id() : -1, window_stack.row(), window_stack.column(), window.is_active(), window.is_minimized(), window.is_modal_dont_unparent(), window.is_frameless(), (i32)window.type(), window.computed_title(), window.rect(), window.progress());
}
void WindowManager::tell_wm_about_window_rect(WMClientConnection& conn, Window& window)
{
if (conn.window_id() < 0)
return;
if (!(conn.event_mask() & WMEventMask::WindowRectChanges))
return;
if (window.is_internal())
return;
conn.async_window_rect_changed(conn.window_id(), window.client_id(), window.window_id(), window.rect());
}
void WindowManager::tell_wm_about_window_icon(WMClientConnection& conn, Window& window)
{
if (conn.window_id() < 0)
return;
if (!(conn.event_mask() & WMEventMask::WindowIconChanges))
return;
if (window.is_internal())
return;
conn.async_window_icon_bitmap_changed(conn.window_id(), window.client_id(), window.window_id(), window.icon().to_shareable_bitmap());
}
void WindowManager::tell_wm_about_current_window_stack(WMClientConnection& conn)
{
if (conn.window_id() < 0)
return;
if (!(conn.event_mask() & WMEventMask::VirtualDesktopChanges))
return;
auto& window_stack = current_window_stack();
conn.async_virtual_desktop_changed(conn.window_id(), window_stack.row(), window_stack.column());
}
void WindowManager::tell_wms_window_state_changed(Window& window)
{
for_each_window_manager([&](WMClientConnection& conn) {
tell_wm_about_window(conn, window);
return IterationDecision::Continue;
});
}
void WindowManager::tell_wms_window_icon_changed(Window& window)
{
for_each_window_manager([&](WMClientConnection& conn) {
tell_wm_about_window_icon(conn, window);
return IterationDecision::Continue;
});
}
void WindowManager::tell_wms_window_rect_changed(Window& window)
{
for_each_window_manager([&](WMClientConnection& conn) {
tell_wm_about_window_rect(conn, window);
return IterationDecision::Continue;
});
}
void WindowManager::tell_wms_screen_rects_changed()
{
ClientConnection::for_each_client([&](ClientConnection& client) {
client.notify_about_new_screen_rects();
});
}
void WindowManager::tell_wms_applet_area_size_changed(Gfx::IntSize const& size)
{
for_each_window_manager([&](WMClientConnection& conn) {
if (conn.window_id() < 0)
return IterationDecision::Continue;
conn.async_applet_area_size_changed(conn.window_id(), size);
return IterationDecision::Continue;
});
}
void WindowManager::tell_wms_super_key_pressed()
{
for_each_window_manager([](WMClientConnection& conn) {
if (conn.window_id() < 0)
return IterationDecision::Continue;
conn.async_super_key_pressed(conn.window_id());
return IterationDecision::Continue;
});
}
void WindowManager::tell_wms_super_space_key_pressed()
{
for_each_window_manager([](WMClientConnection& conn) {
if (conn.window_id() < 0)
return IterationDecision::Continue;
conn.async_super_space_key_pressed(conn.window_id());
return IterationDecision::Continue;
});
}
void WindowManager::tell_wms_current_window_stack_changed()
{
for_each_window_manager([&](WMClientConnection& conn) {
tell_wm_about_current_window_stack(conn);
return IterationDecision::Continue;
});
}
static bool window_type_has_title(WindowType type)
{
return type == WindowType::Normal || type == WindowType::ToolWindow;
}
void WindowManager::notify_modified_changed(Window& window)
{
if (m_switcher.is_visible())
m_switcher.refresh();
tell_wms_window_state_changed(window);
}
void WindowManager::notify_title_changed(Window& window)
{
if (!window_type_has_title(window.type()))
return;
dbgln_if(WINDOWMANAGER_DEBUG, "[WM] Window({}) title set to '{}'", &window, window.title());
if (m_switcher.is_visible())
m_switcher.refresh();
tell_wms_window_state_changed(window);
}
void WindowManager::notify_modal_unparented(Window& window)
{
if (window.type() != WindowType::Normal)
return;
dbgln_if(WINDOWMANAGER_DEBUG, "[WM] Window({}) was unparented", &window);
if (m_switcher.is_visible())
m_switcher.refresh();
tell_wms_window_state_changed(window);
}
void WindowManager::notify_rect_changed(Window& window, Gfx::IntRect const& old_rect, Gfx::IntRect const& new_rect)
{
dbgln_if(RESIZE_DEBUG, "[WM] Window({}) rect changed {} -> {}", &window, old_rect, new_rect);
if (m_switcher.is_visible() && window.type() != WindowType::WindowSwitcher)
m_switcher.refresh();
tell_wms_window_rect_changed(window);
if (window.type() == WindowType::Applet)
AppletManager::the().relayout();
reevaluate_hovered_window(&window);
}
void WindowManager::notify_opacity_changed(Window&)
{
Compositor::the().invalidate_occlusions();
}
void WindowManager::notify_minimization_state_changed(Window& window)
{
tell_wms_window_state_changed(window);
if (window.client())
window.client()->async_window_state_changed(window.window_id(), window.is_minimized(), window.is_occluded());
if (window.is_active() && window.is_minimized())
pick_new_active_window(&window);
}
void WindowManager::notify_occlusion_state_changed(Window& window)
{
if (window.client())
window.client()->async_window_state_changed(window.window_id(), window.is_minimized(), window.is_occluded());
}
void WindowManager::notify_progress_changed(Window& window)
{
tell_wms_window_state_changed(window);
}
bool WindowManager::pick_new_active_window(Window* previous_active)
{
bool new_window_picked = false;
Window* first_candidate = nullptr;
for_each_visible_window_from_front_to_back([&](Window& candidate) {
if (candidate.type() != WindowType::Normal && candidate.type() != WindowType::ToolWindow)
return IterationDecision::Continue;
if (candidate.is_destroyed())
return IterationDecision::Continue;
if (previous_active != first_candidate)
first_candidate = &candidate;
if ((!previous_active && !candidate.is_accessory()) || (previous_active && !candidate.is_accessory_of(*previous_active))) {
set_active_window(&candidate);
new_window_picked = true;
return IterationDecision::Break;
}
return IterationDecision::Continue;
});
if (!new_window_picked) {
set_active_window(first_candidate);
new_window_picked = first_candidate != nullptr;
}
return new_window_picked;
}
void WindowManager::check_hide_geometry_overlay(Window& window)
{
if (&window == m_move_window.ptr() || &window == m_resize_window.ptr())
m_geometry_overlay = nullptr;
}
void WindowManager::start_window_move(Window& window, Gfx::IntPoint const& origin)
{
MenuManager::the().close_everyone();
dbgln_if(MOVE_DEBUG, "[WM] Begin moving Window({})", &window);
move_to_front_and_make_active(window);
m_move_window = window;
m_move_window->set_default_positioned(false);
m_move_origin = origin;
m_move_window_origin = window.position();
m_geometry_overlay = Compositor::the().create_overlay<WindowGeometryOverlay>(window);
m_geometry_overlay->set_enabled(true);
window.invalidate(true, true);
}
void WindowManager::start_window_move(Window& window, MouseEvent const& event)
{
start_window_move(window, event.position());
}
void WindowManager::start_window_resize(Window& window, Gfx::IntPoint const& position, MouseButton button)
{
MenuManager::the().close_everyone();
move_to_front_and_make_active(window);
constexpr ResizeDirection direction_for_hot_area[3][3] = {
{ ResizeDirection::UpLeft, ResizeDirection::Up, ResizeDirection::UpRight },
{ ResizeDirection::Left, ResizeDirection::None, ResizeDirection::Right },
{ ResizeDirection::DownLeft, ResizeDirection::Down, ResizeDirection::DownRight },
};
Gfx::IntRect outer_rect = window.frame().rect();
if (!outer_rect.contains(position)) {
// FIXME: This used to be an VERIFY but crashing WindowServer over this seems silly.
dbgln("FIXME: !outer_rect.contains(position): outer_rect={}, position={}", outer_rect, position);
}
int window_relative_x = position.x() - outer_rect.x();
int window_relative_y = position.y() - outer_rect.y();
int hot_area_row = min(2, window_relative_y / (outer_rect.height() / 3));
int hot_area_column = min(2, window_relative_x / (outer_rect.width() / 3));
m_resize_direction = direction_for_hot_area[hot_area_row][hot_area_column];
if (m_resize_direction == ResizeDirection::None) {
VERIFY(!m_resize_window);
return;
}
dbgln_if(RESIZE_DEBUG, "[WM] Begin resizing Window({})", &window);
m_resizing_mouse_button = button;
m_resize_window = window;
m_resize_origin = position;
m_resize_window_original_rect = window.rect();
m_geometry_overlay = Compositor::the().create_overlay<WindowGeometryOverlay>(window);
m_geometry_overlay->set_enabled(true);
current_window_stack().set_active_input_tracking_window(nullptr);
window.invalidate(true, true);
if (hot_area_row == 0 || hot_area_column == 0) {
m_resize_window->set_default_positioned(false);
}
}
void WindowManager::start_window_resize(Window& window, MouseEvent const& event)
{
start_window_resize(window, event.position(), event.button());
}
bool WindowManager::process_ongoing_window_move(MouseEvent& event)
{
if (!m_move_window)
return false;
if (event.type() == Event::MouseUp && event.button() == MouseButton::Left) {
dbgln_if(MOVE_DEBUG, "[WM] Finish moving Window({})", m_move_window);
m_move_window->invalidate(true, true);
if (m_move_window->is_resizable()) {
process_event_for_doubleclick(*m_move_window, event);
if (event.type() == Event::MouseDoubleClick) {
dbgln_if(DOUBLECLICK_DEBUG, "[WM] Click up became doubleclick!");
m_move_window->set_maximized(!m_move_window->is_maximized());
}
}
m_move_window = nullptr;
m_geometry_overlay = nullptr;
return true;
}
if (event.type() == Event::MouseMove) {
if constexpr (MOVE_DEBUG) {
dbgln("[WM] Moving, origin: {}, now: {}", m_move_origin, event.position());
if (m_move_window->is_maximized())
dbgln(" [!] The window is still maximized. Not moving yet.");
}
const int tiling_deadzone = 10;
const int secondary_deadzone = 2;
auto& cursor_screen = Screen::closest_to_location(event.position());
auto desktop = desktop_rect(cursor_screen);
auto desktop_relative_to_screen = desktop.translated(-cursor_screen.rect().location());
if (m_move_window->is_maximized()) {
auto pixels_moved_from_start = event.position().pixels_moved(m_move_origin);
if (pixels_moved_from_start > 5) {
// dbgln("[WM] de-maximizing window");
m_move_origin = event.position();
if (m_move_origin.y() <= secondary_deadzone + desktop.top())
return true;
m_move_window->set_maximized(false, event.position());
m_move_window_origin = m_move_window->position();
}
} else {
bool is_resizable = m_move_window->is_resizable();
auto pixels_moved_from_start = event.position().pixels_moved(m_move_origin);
auto event_location_relative_to_screen = event.position().translated(-cursor_screen.rect().location());
if (is_resizable && event_location_relative_to_screen.x() <= tiling_deadzone) {
if (event_location_relative_to_screen.y() <= tiling_deadzone + desktop_relative_to_screen.top())
m_move_window->set_tiled(&cursor_screen, WindowTileType::TopLeft);
else if (event_location_relative_to_screen.y() >= desktop_relative_to_screen.height() - tiling_deadzone)
m_move_window->set_tiled(&cursor_screen, WindowTileType::BottomLeft);
else
m_move_window->set_tiled(&cursor_screen, WindowTileType::Left);
} else if (is_resizable && event_location_relative_to_screen.x() >= cursor_screen.width() - tiling_deadzone) {
if (event_location_relative_to_screen.y() <= tiling_deadzone + desktop.top())
m_move_window->set_tiled(&cursor_screen, WindowTileType::TopRight);
else if (event_location_relative_to_screen.y() >= desktop_relative_to_screen.height() - tiling_deadzone)
m_move_window->set_tiled(&cursor_screen, WindowTileType::BottomRight);
else
m_move_window->set_tiled(&cursor_screen, WindowTileType::Right);
} else if (is_resizable && event_location_relative_to_screen.y() <= secondary_deadzone + desktop_relative_to_screen.top()) {
m_move_window->set_tiled(&cursor_screen, WindowTileType::Top);
} else if (is_resizable && event_location_relative_to_screen.y() >= desktop_relative_to_screen.bottom() - secondary_deadzone) {
m_move_window->set_tiled(&cursor_screen, WindowTileType::Bottom);
} else if (m_move_window->tiled() == WindowTileType::None) {
Gfx::IntPoint pos = m_move_window_origin.translated(event.position() - m_move_origin);
m_move_window->set_position_without_repaint(pos);
// "Bounce back" the window if it would end up too far outside the screen.
// If the user has let go of Mod_Super, maybe they didn't intentionally press it to begin with. Therefore, refuse to go into a state where knowledge about super-drags is necessary.
bool force_titlebar_visible = !(m_keyboard_modifiers & Mod_Super);
m_move_window->nudge_into_desktop(&cursor_screen, force_titlebar_visible);
} else if (pixels_moved_from_start > 5) {
m_move_window->set_untiled(event.position());
m_move_origin = event.position();
m_move_window_origin = m_move_window->position();
}
}
m_geometry_overlay->window_rect_changed();
}
return true;
}
bool WindowManager::process_ongoing_window_resize(MouseEvent const& event)
{
if (!m_resize_window)
return false;
if (event.type() == Event::MouseUp && event.button() == m_resizing_mouse_button) {
dbgln_if(RESIZE_DEBUG, "[WM] Finish resizing Window({})", m_resize_window);
const int vertical_maximize_deadzone = 5;
auto& cursor_screen = ScreenInput::the().cursor_location_screen();
if (&cursor_screen == &Screen::closest_to_rect(m_resize_window->rect())) {
auto desktop_rect = this->desktop_rect(cursor_screen);
if (event.y() >= desktop_rect.bottom() - vertical_maximize_deadzone + 1 || event.y() <= desktop_rect.top() + vertical_maximize_deadzone - 1) {
dbgln_if(RESIZE_DEBUG, "Should Maximize vertically");
m_resize_window->set_vertically_maximized();
m_resize_window = nullptr;
m_geometry_overlay = nullptr;
m_resizing_mouse_button = MouseButton::None;
return true;
}
}
Core::EventLoop::current().post_event(*m_resize_window, make<ResizeEvent>(m_resize_window->rect()));
m_resize_window->invalidate(true, true);
m_resize_window = nullptr;
m_geometry_overlay = nullptr;
m_resizing_mouse_button = MouseButton::None;
return true;
}
if (event.type() != Event::MouseMove)
return true;
int diff_x = event.x() - m_resize_origin.x();
int diff_y = event.y() - m_resize_origin.y();
int change_w = 0;
int change_h = 0;
switch (m_resize_direction) {
case ResizeDirection::DownRight:
change_w = diff_x;
change_h = diff_y;
break;
case ResizeDirection::Right:
change_w = diff_x;
break;
case ResizeDirection::UpRight:
change_w = diff_x;
change_h = -diff_y;
break;
case ResizeDirection::Up:
change_h = -diff_y;
break;
case ResizeDirection::UpLeft:
change_w = -diff_x;
change_h = -diff_y;
break;
case ResizeDirection::Left:
change_w = -diff_x;
break;
case ResizeDirection::DownLeft:
change_w = -diff_x;
change_h = diff_y;
break;
case ResizeDirection::Down:
change_h = diff_y;
break;
default:
VERIFY_NOT_REACHED();
}
auto new_rect = m_resize_window_original_rect;
// First, size the new rect.
new_rect.set_width(new_rect.width() + change_w);
new_rect.set_height(new_rect.height() + change_h);
m_resize_window->apply_minimum_size(new_rect);
if (!m_resize_window->size_increment().is_null()) {
int horizontal_incs = (new_rect.width() - m_resize_window->base_size().width()) / m_resize_window->size_increment().width();
new_rect.set_width(m_resize_window->base_size().width() + horizontal_incs * m_resize_window->size_increment().width());
int vertical_incs = (new_rect.height() - m_resize_window->base_size().height()) / m_resize_window->size_increment().height();
new_rect.set_height(m_resize_window->base_size().height() + vertical_incs * m_resize_window->size_increment().height());
}
if (m_resize_window->resize_aspect_ratio().has_value()) {
auto& ratio = m_resize_window->resize_aspect_ratio().value();
auto base_size = m_resize_window->base_size();
if (abs(change_w) > abs(change_h)) {
new_rect.set_height(base_size.height() + (new_rect.width() - base_size.width()) * ratio.height() / ratio.width());
} else {
new_rect.set_width(base_size.width() + (new_rect.height() - base_size.height()) * ratio.width() / ratio.height());
}
}
// Second, set its position so that the sides of the window
// that end up moving are the same ones as the user is dragging,
// no matter which part of the logic above caused us to decide
// to resize by this much.
switch (m_resize_direction) {
case ResizeDirection::DownRight:
case ResizeDirection::Right:
case ResizeDirection::Down:
break;
case ResizeDirection::Left:
case ResizeDirection::Up:
case ResizeDirection::UpLeft:
new_rect.set_right_without_resize(m_resize_window_original_rect.right());
new_rect.set_bottom_without_resize(m_resize_window_original_rect.bottom());
break;
case ResizeDirection::UpRight:
new_rect.set_bottom_without_resize(m_resize_window_original_rect.bottom());
break;
case ResizeDirection::DownLeft:
new_rect.set_right_without_resize(m_resize_window_original_rect.right());
break;
default:
VERIFY_NOT_REACHED();
}
if (m_resize_window->rect() == new_rect)
return true;
if (m_resize_window->tiled() != WindowTileType::None) {
// Check if we should be un-tiling the window. This should happen when one side touching
// the screen border changes. We need to un-tile because while it is tiled, rendering is
// constrained to the screen where it's tiled on, and if one of these sides move we should
// no longer constrain rendering to that screen. Changing the sides not touching a screen
// border however is fine as long as the screen contains the entire window.
m_resize_window->check_untile_due_to_resize(new_rect);
}
dbgln_if(RESIZE_DEBUG, "[WM] Resizing, original: {}, now: {}", m_resize_window_original_rect, new_rect);
m_resize_window->set_rect(new_rect);
m_geometry_overlay->window_rect_changed();
Core::EventLoop::current().post_event(*m_resize_window, make<ResizeEvent>(new_rect));
return true;
}
bool WindowManager::process_ongoing_drag(MouseEvent& event)
{
if (!m_dnd_client)
return false;
if (event.type() == Event::MouseMove) {
m_dnd_overlay->cursor_moved();
// We didn't let go of the drag yet, see if we should send some drag move events..
for_each_visible_window_from_front_to_back([&](Window& window) {
if (!window.rect().contains(event.position()))
return IterationDecision::Continue;
event.set_drag(true);
event.set_mime_data(*m_dnd_mime_data);
deliver_mouse_event(window, event, false);
return IterationDecision::Break;
});
}
if (!(event.type() == Event::MouseUp && event.button() == MouseButton::Left))
return true;
if (auto* window = current_window_stack().window_at(event.position())) {
m_dnd_client->async_drag_accepted();
if (window->client()) {
auto translated_event = event.translated(-window->position());
window->client()->async_drag_dropped(window->window_id(), translated_event.position(), m_dnd_text, m_dnd_mime_data->all_data());
}
} else {
m_dnd_client->async_drag_cancelled();
}
end_dnd_drag();
return true;
}
void WindowManager::set_cursor_tracking_button(Button* button)
{
m_cursor_tracking_button = button;
}
auto WindowManager::DoubleClickInfo::metadata_for_button(MouseButton button) const -> ClickMetadata const&
{
switch (button) {
case MouseButton::Left:
return m_left;
case MouseButton::Right:
return m_right;
case MouseButton::Middle:
return m_middle;
case MouseButton::Back:
return m_back;
case MouseButton::Forward:
return m_forward;
default:
VERIFY_NOT_REACHED();
}
}
auto WindowManager::DoubleClickInfo::metadata_for_button(MouseButton button) -> ClickMetadata&
{
switch (button) {
case MouseButton::Left:
return m_left;
case MouseButton::Right:
return m_right;
case MouseButton::Middle:
return m_middle;
case MouseButton::Back:
return m_back;
case MouseButton::Forward:
return m_forward;
default:
VERIFY_NOT_REACHED();
}
}
bool WindowManager::is_considered_doubleclick(MouseEvent const& event, DoubleClickInfo::ClickMetadata const& metadata) const
{
int elapsed_since_last_click = metadata.clock.elapsed();
if (elapsed_since_last_click < m_double_click_speed) {
auto diff = event.position() - metadata.last_position;
auto distance_travelled_squared = diff.x() * diff.x() + diff.y() * diff.y();
if (distance_travelled_squared <= (m_max_distance_for_double_click * m_max_distance_for_double_click))
return true;
}
return false;
}
void WindowManager::start_menu_doubleclick(Window& window, MouseEvent const& event)
{
// This is a special case. Basically, we're trying to determine whether
// double clicking on the window menu icon happened. In this case, the
// WindowFrame only receives a MouseDown event, and since the window
// menu popus up, it does not see the MouseUp event. But, if they subsequently
// click there again, the menu is closed and we receive a MouseUp event.
// So, in order to be able to detect a double click when a menu is being
// opened by the MouseDown event, we need to consider the MouseDown event
// as a potential double-click trigger
VERIFY(event.type() == Event::MouseDown);
auto& metadata = m_double_click_info.metadata_for_button(event.button());
if (&window != m_double_click_info.m_clicked_window) {
// we either haven't clicked anywhere, or we haven't clicked on this
// window. set the current click window, and reset the timers.
dbgln_if(DOUBLECLICK_DEBUG, "Initial mousedown on Window({}) for menus (previous was {})", &window, m_double_click_info.m_clicked_window);
m_double_click_info.m_clicked_window = window;
m_double_click_info.reset();
}
metadata.last_position = event.position();
metadata.clock.start();
}
bool WindowManager::is_menu_doubleclick(Window& window, MouseEvent const& event) const
{
VERIFY(event.type() == Event::MouseUp);
if (&window != m_double_click_info.m_clicked_window)
return false;
auto& metadata = m_double_click_info.metadata_for_button(event.button());
if (!metadata.clock.is_valid())
return false;
return is_considered_doubleclick(event, metadata);
}
void WindowManager::process_event_for_doubleclick(Window& window, MouseEvent& event)
{
// We only care about button presses (because otherwise it's not a doubleclick, duh!)
VERIFY(event.type() == Event::MouseUp);
if (&window != m_double_click_info.m_clicked_window) {
// we either haven't clicked anywhere, or we haven't clicked on this
// window. set the current click window, and reset the timers.
dbgln_if(DOUBLECLICK_DEBUG, "Initial mouseup on Window({}) for menus (previous was {})", &window, m_double_click_info.m_clicked_window);
m_double_click_info.m_clicked_window = window;
m_double_click_info.reset();
}
auto& metadata = m_double_click_info.metadata_for_button(event.button());
if (!metadata.clock.is_valid() || !is_considered_doubleclick(event, metadata)) {
// either the clock is invalid because we haven't clicked on this
// button on this window yet, so there's nothing to do, or this
// isn't considered to be a double click. either way, restart the
// clock
metadata.clock.start();
} else {
dbgln_if(DOUBLECLICK_DEBUG, "Transforming MouseUp to MouseDoubleClick ({} < {})!", metadata.clock.elapsed(), m_double_click_speed);
event = MouseEvent(Event::MouseDoubleClick, event.position(), event.buttons(), event.button(), event.modifiers(), event.wheel_delta());
// invalidate this now we've delivered a doubleclick, otherwise
// tripleclick will deliver two doubleclick events (incorrectly).
metadata.clock = {};
}
metadata.last_position = event.position();
}
void WindowManager::deliver_mouse_event(Window& window, MouseEvent const& event, bool process_double_click)
{
auto translated_event = event.translated(-window.position());
window.dispatch_event(translated_event);
if (process_double_click && translated_event.type() == Event::MouseUp) {
process_event_for_doubleclick(window, translated_event);
if (translated_event.type() == Event::MouseDoubleClick)
window.dispatch_event(translated_event);
}
}
bool WindowManager::process_ongoing_active_input_mouse_event(MouseEvent const& event)
{
auto& window_stack = current_window_stack();
auto* input_tracking_window = window_stack.active_input_tracking_window();
if (!input_tracking_window)
return false;
// At this point, we have delivered the start of an input sequence to a
// client application. We must keep delivering to that client
// application until the input sequence is done.
//
// This prevents e.g. moving on one window out of the bounds starting
// a move in that other unrelated window, and other silly shenanigans.
deliver_mouse_event(*input_tracking_window, event, true);
if (event.type() == Event::MouseUp && event.buttons() == 0)
window_stack.set_active_input_tracking_window(nullptr);
return true;
}
bool WindowManager::process_mouse_event_for_titlebar_buttons(MouseEvent const& event)
{
if (m_cursor_tracking_button) {
m_cursor_tracking_button->on_mouse_event(event.translated(-m_cursor_tracking_button->screen_rect().location()));
return true;
}
// This is quite hackish, but it's how the Button hover effect is implemented.
if (m_hovered_button && event.type() == Event::MouseMove)
m_hovered_button->on_mouse_event(event.translated(-m_hovered_button->screen_rect().location()));
return false;
}
void WindowManager::process_mouse_event_for_window(HitTestResult& result, MouseEvent const& event)
{
auto& window = *result.window;
auto* blocking_modal_window = window.blocking_modal_window();
// First check if we should initiate a move or resize (Super+LMB or Super+RMB).
// In those cases, the event is swallowed by the window manager.
if (!blocking_modal_window && window.is_movable()) {
if (!window.is_fullscreen() && m_keyboard_modifiers == Mod_Super && event.type() == Event::MouseDown && event.button() == MouseButton::Left) {
start_window_move(window, event);
return;
}
if (window.is_resizable() && m_keyboard_modifiers == Mod_Super && event.type() == Event::MouseDown && event.button() == MouseButton::Right && !window.blocking_modal_window()) {
start_window_resize(window, event);
return;
}
}
if (event.type() == Event::MouseDown) {
if (window.type() == WindowType::Normal || window.type() == WindowType::ToolWindow)
move_to_front_and_make_active(window);
else if (window.type() == WindowType::Desktop)
set_active_window(&window);
}
if (blocking_modal_window) {
if (event.type() == Event::Type::MouseDown) {
// We're clicking on something that's blocked by a modal window.
// Flash the modal window to let the user know about it.
blocking_modal_window->frame().start_flash_animation();
}
// Don't send mouse events to windows blocked by a modal child.
return;
}
if (result.is_frame_hit) {
// We are hitting the frame, pass the event along to WindowFrame.
window.frame().handle_mouse_event(event.translated(-window.frame().rect().location()));
return;
}
if (!window.global_cursor_tracking()) {
deliver_mouse_event(window, event, true);
}
if (event.type() == Event::MouseDown)
current_window_stack().set_active_input_tracking_window(&window);
}
void WindowManager::process_mouse_event(MouseEvent& event)
{
// 0. Forget the resize candidate (window that we could initiate a resize of from the current cursor position.)
// A new resize candidate may be determined if we hit an appropriate part of a window.
clear_resize_candidate();
// 1. Process ongoing drag events. This is done first to avoid clashing with global cursor tracking.
if (process_ongoing_drag(event))
return;
// 2. Send the mouse event to all clients with global cursor tracking enabled.
ClientConnection::for_each_client([&](ClientConnection& conn) {
if (conn.does_global_mouse_tracking()) {
conn.async_track_mouse_move(event.position());
}
});
// 3. If there's an active input tracking window, all mouse events go there.
// Tracking ends after all mouse buttons have been released.
if (process_ongoing_active_input_mouse_event(event))
return;
// 4. If there's a window being moved around, take care of that.
if (process_ongoing_window_move(event))
return;
// 5. If there's a window being resized, take care of that.
if (process_ongoing_window_resize(event))
return;
// 6. If the event is inside a titlebar button, WindowServer implements all
// the behavior for those buttons internally.
if (process_mouse_event_for_titlebar_buttons(event))
return;
// 7. If there are menus open, deal with them now. (FIXME: This needs to be cleaned up & simplified!)
bool hitting_menu_in_window_with_active_menu = [&] {
if (!m_window_with_active_menu)
return false;
auto& frame = m_window_with_active_menu->frame();
return frame.menubar_rect().contains(event.position().translated(-frame.rect().location()));
}();
// FIXME: This is quite hackish, we clear the hovered menu before potentially setting the same menu
// as hovered again. This makes sure that the hovered state doesn't linger after moving the
// cursor away from a hovered menu.
MenuManager::the().set_hovered_menu(nullptr);
if (MenuManager::the().has_open_menu()
|| hitting_menu_in_window_with_active_menu) {
if (!hitting_menu_in_window_with_active_menu) {
MenuManager::the().dispatch_event(event);
return;
}
}
// 8. Hit test the window stack to see what's under the cursor.
auto result = current_window_stack().hit_test(event.position());
if (!result.has_value()) {
// No window is under the cursor.
if (event.type() == Event::MouseDown) {
// Clicked outside of any window -> no active window.
// FIXME: Is this actually necessary? The desktop window should catch everything anyway.
set_active_window(nullptr);
}
return;
}
process_mouse_event_for_window(result.value(), event);
}
void WindowManager::reevaluate_hovered_window(Window* updated_window)
{
if (m_dnd_client || m_resize_window || m_move_window || m_cursor_tracking_button || MenuManager::the().has_open_menu())
return;
auto cursor_location = ScreenInput::the().cursor_location();
auto* currently_hovered = hovered_window();
if (updated_window) {
if (!(updated_window == currently_hovered || updated_window->frame().rect().contains(cursor_location) || (currently_hovered && currently_hovered->frame().rect().contains(cursor_location))))
return;
}
Window* hovered_window = nullptr;
if (auto* fullscreen_window = active_fullscreen_window()) {
if (fullscreen_window->hit_test(cursor_location).has_value())
hovered_window = fullscreen_window;
} else {
hovered_window = current_window_stack().window_at(cursor_location);
}
if (set_hovered_window(hovered_window)) {
if (currently_hovered && m_resize_candidate == currently_hovered)
clear_resize_candidate();
if (hovered_window) {
// Send a fake MouseMove event. This allows the new hovering window
// to determine which widget we're hovering, and also update the cursor
// accordingly. We do this because this re-evaluation of the currently
// hovered window wasn't triggered by a mouse move event, but rather
// e.g. a hit-test result change due to a transparent window repaint.
if (hovered_window->hit_test(cursor_location, false).has_value()) {
MouseEvent event(Event::MouseMove, cursor_location.translated(-hovered_window->rect().location()), 0, MouseButton::None, 0);
hovered_window->dispatch_event(event);
} else if (!hovered_window->is_frameless()) {
MouseEvent event(Event::MouseMove, cursor_location.translated(-hovered_window->frame().rect().location()), 0, MouseButton::None, 0);
hovered_window->frame().handle_mouse_event(event);
}
}
}
}
void WindowManager::clear_resize_candidate()
{
if (m_resize_candidate)
Compositor::the().invalidate_cursor();
m_resize_candidate = nullptr;
}
Gfx::IntRect WindowManager::desktop_rect(Screen& screen) const
{
if (active_fullscreen_window())
return Screen::main().rect(); // TODO: we should support fullscreen windows on any screen
auto screen_rect = screen.rect();
if (screen.is_main_screen())
screen_rect.set_height(screen.height() - 28);
return screen_rect;
}
Gfx::IntRect WindowManager::arena_rect_for_type(Screen& screen, WindowType type) const
{
switch (type) {
case WindowType::Desktop:
return Screen::bounding_rect();
case WindowType::Normal:
case WindowType::ToolWindow:
return desktop_rect(screen);
case WindowType::Menu:
case WindowType::WindowSwitcher:
case WindowType::Taskbar:
case WindowType::Tooltip:
case WindowType::Applet:
case WindowType::Notification:
return screen.rect();
default:
VERIFY_NOT_REACHED();
}
}
void WindowManager::event(Core::Event& event)
{
if (static_cast<Event&>(event).is_mouse_event()) {
auto& mouse_event = static_cast<MouseEvent&>(event);
if (mouse_event.type() != Event::MouseMove)
m_previous_event_was_super_keydown = false;
process_mouse_event(mouse_event);
// TODO: handle transitioning between two stacks
set_hovered_window(current_window_stack().window_at(mouse_event.position(), WindowStack::IncludeWindowFrame::No));
return;
}
if (static_cast<Event&>(event).is_key_event()) {
process_key_event(static_cast<KeyEvent&>(event));
return;
}
Core::Object::event(event);
}
bool WindowManager::is_window_in_modal_stack(Window& window_in_modal_stack, Window& other_window)
{
auto result = for_each_window_in_modal_stack(window_in_modal_stack, [&](auto& window, auto) {
if (&other_window == &window)
return IterationDecision::Break;
for (auto& accessory : window.accessory_windows()) {
if (accessory.ptr() == &other_window)
return IterationDecision::Break;
}
return IterationDecision::Continue;
});
return result == IterationDecision::Break;
}
void WindowManager::switch_to_window_stack(WindowStack& window_stack, Window* carry_window, bool show_overlay)
{
m_carry_window_to_new_stack.clear();
m_switching_to_window_stack = &window_stack;
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)))
m_carry_window_to_new_stack.append(window);
return IterationDecision::Continue;
},
&from_stack);
auto* from_active_window = from_stack.active_window();
auto* from_active_input_window = from_stack.active_input_window();
bool did_carry_active_window = false;
bool did_carry_active_input_window = false;
for (auto& window : m_carry_window_to_new_stack) {
if (window == from_active_window)
did_carry_active_window = true;
if (window == from_active_input_window)
did_carry_active_input_window = true;
window->set_moving_to_another_stack(true);
VERIFY(&window->window_stack() == &from_stack);
from_stack.remove(*window);
window_stack.add(*window);
}
// Before we change to the new stack, find a new active window on the stack we're switching from
if (did_carry_active_window || did_carry_active_input_window)
pick_new_active_window(from_active_window);
// Now switch to the new stack
m_current_window_stack = &window_stack;
if (did_carry_active_window && from_active_window)
set_active_window(from_active_window, from_active_input_window == from_active_window);
if (did_carry_active_input_window && from_active_input_window && from_active_input_window != from_active_window)
set_active_input_window(from_active_input_window);
// Because we moved windows between stacks we need to invalidate occlusions
Compositor::the().invalidate_occlusions();
} else {
m_current_window_stack = &window_stack;
}
Compositor::the().switch_to_window_stack(window_stack, show_overlay);
}
void WindowManager::did_switch_window_stack(Badge<Compositor>, WindowStack& previous_stack, WindowStack& new_stack)
{
VERIFY(&previous_stack != &new_stack);
// We are being notified by the compositor, it should not be switching right now!
VERIFY(!Compositor::the().is_switching_window_stacks());
if (m_switching_to_window_stack == &new_stack) {
m_switching_to_window_stack = nullptr;
if (!m_carry_window_to_new_stack.is_empty()) {
// switched_to_stack may be different from the stack where the windows were
// carried to when the user rapidly tries to switch stacks, so make sure to
// only reset the moving flag if we arrived at our final destination
for (auto& window_ref : m_carry_window_to_new_stack) {
if (auto* window = window_ref.ptr()) {
window->set_moving_to_another_stack(false);
tell_wms_window_state_changed(*window);
}
}
m_carry_window_to_new_stack.clear();
}
}
auto* previous_stack_active_window = previous_stack.active_window();
auto* previous_stack_active_input_window = previous_stack.active_input_window();
auto* new_stack_active_window = new_stack.active_window();
auto* new_stack_active_input_window = new_stack.active_input_window();
if (previous_stack_active_input_window && previous_stack_active_input_window != new_stack_active_input_window)
notify_previous_active_input_window(*previous_stack_active_input_window);
if (new_stack_active_input_window && previous_stack_active_input_window != new_stack_active_input_window)
notify_new_active_input_window(*new_stack_active_input_window);
if (previous_stack_active_window != new_stack_active_window) {
if (previous_stack_active_window && is_stationary_window_type(previous_stack_active_window->type()))
notify_previous_active_window(*previous_stack_active_window);
if (new_stack_active_window && is_stationary_window_type(new_stack_active_window->type()))
notify_new_active_window(*new_stack_active_window);
}
if (!new_stack_active_input_window)
pick_new_active_window(nullptr);
reevaluate_hovered_window();
tell_wms_current_window_stack_changed();
}
void WindowManager::process_key_event(KeyEvent& event)
{
m_keyboard_modifiers = event.modifiers();
// Escape key cancels an ongoing drag.
if (event.type() == Event::KeyDown && event.key() == Key_Escape && m_dnd_client) {
// Notify the drag-n-drop client that the drag was cancelled.
m_dnd_client->async_drag_cancelled();
// Also notify the currently hovered window (if any) that the ongoing drag was cancelled.
if (m_hovered_window && m_hovered_window->client() && m_hovered_window->client() != m_dnd_client)
m_hovered_window->client()->async_drag_cancelled();
end_dnd_drag();
return;
}
// FIXME: This is fragile, the kernel should send a signal when we switch back to the WindowManager's framebuffer
if (event.type() == Event::KeyDown && (event.modifiers() & Mod_Alt) && (event.key() == Key_ExclamationPoint || event.key() == Key_1)) {
Compositor::the().invalidate_screen();
return;
}
if (event.type() == Event::KeyDown && (event.modifiers() == (Mod_Ctrl | Mod_Super | Mod_Shift) && event.key() == Key_I)) {
reload_icon_bitmaps_after_scale_change();
Compositor::the().invalidate_screen();
return;
}
if (event.type() == Event::KeyDown && event.key() == Key_Super) {
m_previous_event_was_super_keydown = true;
} else if (m_previous_event_was_super_keydown) {
m_previous_event_was_super_keydown = false;
if (!m_dnd_client && !current_window_stack().active_input_tracking_window() && event.type() == Event::KeyUp && event.key() == Key_Super) {
tell_wms_super_key_pressed();
return;
}
if (event.type() == Event::KeyDown && event.key() == Key_Space) {
tell_wms_super_space_key_pressed();
return;
}
}
if (MenuManager::the().current_menu() && event.key() != Key_Super) {
MenuManager::the().dispatch_event(event);
return;
}
if (event.type() == Event::KeyDown) {
if ((event.modifiers() == Mod_Super && event.key() == Key_Tab) || (event.modifiers() == (Mod_Super | Mod_Shift) && event.key() == Key_Tab))
m_switcher.show(WindowSwitcher::Mode::ShowAllWindows);
else if ((event.modifiers() == Mod_Alt && event.key() == Key_Tab) || (event.modifiers() == (Mod_Alt | Mod_Shift) && event.key() == Key_Tab))
m_switcher.show(WindowSwitcher::Mode::ShowCurrentDesktop);
}
if (m_switcher.is_visible()) {
m_switcher.on_key_event(event);
return;
}
if (event.type() == Event::KeyDown && (event.modifiers() == (Mod_Ctrl | Mod_Alt) || event.modifiers() == (Mod_Ctrl | Mod_Shift | Mod_Alt)) && (window_stack_columns() > 1 || window_stack_rows() > 1)) {
auto& current_stack = current_window_stack();
auto row = current_stack.row();
auto column = current_stack.column();
auto handle_window_stack_switch_key = [&]() {
switch (event.key()) {
case Key_Left:
if (column == 0)
return true;
column--;
return true;
case Key_Right:
if (column + 1 >= m_window_stacks[0].size())
return true;
column++;
return true;
case Key_Up:
if (row == 0)
return true;
row--;
return true;
case Key_Down:
if (row + 1 >= m_window_stacks.size())
return true;
row++;
return true;
default:
return false;
}
};
if (handle_window_stack_switch_key()) {
Window* carry_window = nullptr;
auto& new_window_stack = m_window_stacks[row][column];
if (&new_window_stack != &current_stack) {
if (event.modifiers() == (Mod_Ctrl | Mod_Shift | Mod_Alt))
carry_window = this->active_window();
}
// Call switch_to_window_stack even if we're not going to switch to another stack.
// We'll show the window stack switch overlay briefly!
switch_to_window_stack(new_window_stack, carry_window);
return;
}
}
auto* active_input_window = current_window_stack().active_input_window();
if (!active_input_window)
return;
if (event.type() == Event::KeyDown && event.modifiers() == Mod_Super && active_input_window->type() != WindowType::Desktop) {
if (event.key() == Key_Down) {
if (active_input_window->is_resizable() && active_input_window->is_maximized()) {
maximize_windows(*active_input_window, false);
return;
}
if (active_input_window->is_minimizable())
minimize_windows(*active_input_window, true);
return;
}
if (active_input_window->is_resizable()) {
if (event.key() == Key_Up) {
maximize_windows(*active_input_window, !active_input_window->is_maximized());
return;
}
if (event.key() == Key_Left) {
if (active_input_window->tiled() == WindowTileType::Left)
return;
if (active_input_window->tiled() != WindowTileType::None) {
active_input_window->set_untiled();
return;
}
if (active_input_window->is_maximized())
maximize_windows(*active_input_window, false);
active_input_window->set_tiled(nullptr, WindowTileType::Left);
return;
}
if (event.key() == Key_Right) {
if (active_input_window->tiled() == WindowTileType::Right)
return;
if (active_input_window->tiled() != WindowTileType::None) {
active_input_window->set_untiled();
return;
}
if (active_input_window->is_maximized())
maximize_windows(*active_input_window, false);
active_input_window->set_tiled(nullptr, WindowTileType::Right);
return;
}
}
}
active_input_window->dispatch_event(event);
}
void WindowManager::set_highlight_window(Window* new_highlight_window)
{
// NOTE: The highlight window is global across all stacks. That's because we
// can only have one and we want to be able to highlight it during transitions
auto* previous_highlight_window = highlight_window();
if (new_highlight_window == previous_highlight_window)
return;
if (!new_highlight_window)
m_highlight_window = nullptr;
else
m_highlight_window = new_highlight_window->make_weak_ptr<Window>();
if (previous_highlight_window) {
previous_highlight_window->invalidate(true, true);
Compositor::the().invalidate_screen(previous_highlight_window->frame().render_rect());
}
if (new_highlight_window) {
new_highlight_window->invalidate(true, true);
Compositor::the().invalidate_screen(new_highlight_window->frame().render_rect());
}
// Invalidate occlusions in case the state change changes geometry
Compositor::the().invalidate_occlusions();
}
bool WindowManager::is_active_window_or_accessory(Window& window) const
{
if (window.is_accessory())
return window.parent_window()->is_active();
return window.is_active();
}
static bool window_type_can_become_active(WindowType type)
{
return type == WindowType::Normal || type == WindowType::ToolWindow || type == WindowType::Desktop;
}
void WindowManager::restore_active_input_window(Window* window)
{
// If the previous active input window is gone, fall back to the
// current active window
if (!window)
window = active_window();
// If the current active window is also gone, pick some other window
if (!window && pick_new_active_window(nullptr))
return;
if (window && !window->is_minimized() && window->is_visible())
set_active_input_window(window);
else
set_active_input_window(nullptr);
}
Window* WindowManager::set_active_input_window(Window* window)
{
auto& window_stack = current_window_stack();
auto* previous_input_window = window_stack.active_input_window();
if (window == previous_input_window)
return window;
if (previous_input_window)
notify_previous_active_input_window(*previous_input_window);
window_stack.set_active_input_window(window);
if (window)
notify_new_active_input_window(*window);
return previous_input_window;
}
void WindowManager::notify_new_active_input_window(Window& new_input_window)
{
Core::EventLoop::current().post_event(new_input_window, make<Event>(Event::WindowInputEntered));
}
void WindowManager::notify_previous_active_input_window(Window& previous_input_window)
{
Core::EventLoop::current().post_event(previous_input_window, make<Event>(Event::WindowInputLeft));
}
void WindowManager::set_active_window(Window* new_active_window, bool make_input)
{
if (new_active_window) {
if (auto* modal_window = new_active_window->blocking_modal_window()) {
VERIFY(modal_window->is_modal());
VERIFY(modal_window != new_active_window);
new_active_window = modal_window;
make_input = true;
}
if (!window_type_can_become_active(new_active_window->type()))
return;
}
auto* new_active_input_window = new_active_window;
if (new_active_window && new_active_window->is_accessory()) {
// The parent of an accessory window is always the active
// window, but input is routed to the accessory window
new_active_window = new_active_window->parent_window();
}
if (make_input)
set_active_input_window(new_active_input_window);
auto& window_stack = current_window_stack();
if (new_active_window == window_stack.active_window())
return;
if (auto* previously_active_window = window_stack.active_window()) {
window_stack.set_active_window(nullptr);
window_stack.set_active_input_tracking_window(nullptr);
notify_previous_active_window(*previously_active_window);
}
if (new_active_window) {
window_stack.set_active_window(new_active_window);
notify_new_active_window(*new_active_window);
}
// Window shapes may have changed (e.g. shadows for inactive/active windows)
Compositor::the().invalidate_occlusions();
}
void WindowManager::notify_new_active_window(Window& new_active_window)
{
Core::EventLoop::current().post_event(new_active_window, make<Event>(Event::WindowActivated));
new_active_window.invalidate(true, true);
tell_wms_window_state_changed(new_active_window);
}
void WindowManager::notify_previous_active_window(Window& previously_active_window)
{
for (auto& child_window : previously_active_window.child_windows()) {
if (child_window && child_window->type() == WindowType::Tooltip)
child_window->request_close();
}
Core::EventLoop::current().post_event(previously_active_window, make<Event>(Event::WindowDeactivated));
previously_active_window.invalidate(true, true);
tell_wms_window_state_changed(previously_active_window);
}
bool WindowManager::set_hovered_window(Window* window)
{
if (m_hovered_window == window)
return false;
if (m_hovered_window)
Core::EventLoop::current().post_event(*m_hovered_window, make<Event>(Event::WindowLeft));
m_hovered_window = window;
if (m_hovered_window)
Core::EventLoop::current().post_event(*m_hovered_window, make<Event>(Event::WindowEntered));
return true;
}
ClientConnection const* WindowManager::active_client() const
{
if (auto* window = const_cast<WindowManager*>(this)->current_window_stack().active_window())
return window->client();
return nullptr;
}
Cursor const& WindowManager::active_cursor() const
{
if (m_dnd_client)
return *m_drag_cursor;
if (m_move_window)
return *m_move_cursor;
if (m_resize_window || m_resize_candidate) {
switch (m_resize_direction) {
case ResizeDirection::Up:
case ResizeDirection::Down:
return *m_resize_vertically_cursor;
case ResizeDirection::Left:
case ResizeDirection::Right:
return *m_resize_horizontally_cursor;
case ResizeDirection::UpLeft:
case ResizeDirection::DownRight:
return *m_resize_diagonally_tlbr_cursor;
case ResizeDirection::UpRight:
case ResizeDirection::DownLeft:
return *m_resize_diagonally_bltr_cursor;
case ResizeDirection::None:
break;
}
}
if (m_hovered_window) {
if (auto* modal_window = const_cast<Window&>(*m_hovered_window).blocking_modal_window()) {
if (modal_window->cursor())
return *modal_window->cursor();
} else if (m_hovered_window->cursor()) {
return *m_hovered_window->cursor();
}
}
return *m_arrow_cursor;
}
void WindowManager::set_hovered_button(Button* button)
{
m_hovered_button = button;
}
void WindowManager::set_resize_candidate(Window& window, ResizeDirection direction)
{
m_resize_candidate = window;
m_resize_direction = direction;
}
ResizeDirection WindowManager::resize_direction_of_window(Window const& window)
{
if (&window != m_resize_window)
return ResizeDirection::None;
return m_resize_direction;
}
Gfx::IntRect WindowManager::maximized_window_rect(Window const& window, bool relative_to_window_screen) const
{
auto& screen = Screen::closest_to_rect(window.frame().rect());
Gfx::IntRect rect = screen.rect();
// Subtract window title bar (leaving the border)
rect.set_y(rect.y() + window.frame().titlebar_rect().height() + window.frame().menubar_rect().height());
rect.set_height(rect.height() - window.frame().titlebar_rect().height() - window.frame().menubar_rect().height());
if (screen.is_main_screen()) {
// Subtract taskbar window height if present
const_cast<WindowManager*>(this)->current_window_stack().for_each_visible_window_of_type_from_back_to_front(WindowType::Taskbar, [&rect](Window& taskbar_window) {
rect.set_height(rect.height() - taskbar_window.height());
return IterationDecision::Break;
});
}
constexpr int tasteful_space_above_maximized_window = 1;
rect.set_y(rect.y() + tasteful_space_above_maximized_window);
rect.set_height(rect.height() - tasteful_space_above_maximized_window);
if (relative_to_window_screen)
rect.translate_by(-screen.rect().location());
return rect;
}
void WindowManager::start_dnd_drag(ClientConnection& client, String const& text, Gfx::Bitmap const* bitmap, Core::MimeData const& mime_data)
{
VERIFY(!m_dnd_client);
m_dnd_client = client;
m_dnd_text = text;
m_dnd_overlay = Compositor::the().create_overlay<DndOverlay>(text, bitmap);
m_dnd_overlay->set_enabled(true);
m_dnd_mime_data = mime_data;
Compositor::the().invalidate_cursor();
current_window_stack().set_active_input_tracking_window(nullptr);
}
void WindowManager::end_dnd_drag()
{
VERIFY(m_dnd_client);
Compositor::the().invalidate_cursor();
m_dnd_client = nullptr;
m_dnd_text = {};
m_dnd_overlay = nullptr;
}
void WindowManager::invalidate_after_theme_or_font_change()
{
Compositor::the().set_background_color(m_config->read_entry("Background", "Color", palette().desktop_background().to_string()));
WindowFrame::reload_config();
for_each_window_stack([&](auto& window_stack) {
window_stack.for_each_window([&](Window& window) {
window.frame().theme_changed();
return IterationDecision::Continue;
});
return IterationDecision::Continue;
});
ClientConnection::for_each_client([&](ClientConnection& client) {
client.async_update_system_theme(Gfx::current_system_theme_buffer());
});
MenuManager::the().did_change_theme();
AppletManager::the().did_change_theme();
Compositor::the().invalidate_after_theme_or_font_change();
}
bool WindowManager::update_theme(String theme_path, String theme_name)
{
auto new_theme = Gfx::load_system_theme(theme_path);
if (!new_theme.is_valid())
return false;
Gfx::set_system_theme(new_theme);
m_palette = Gfx::PaletteImpl::create_with_anonymous_buffer(new_theme);
m_config->write_entry("Theme", "Name", theme_name);
m_config->remove_entry("Background", "Color");
m_config->sync();
invalidate_after_theme_or_font_change();
return true;
}
void WindowManager::did_popup_a_menu(Badge<Menu>)
{
// Clear any ongoing input gesture
auto* active_input_tracking_window = current_window_stack().active_input_tracking_window();
if (!active_input_tracking_window)
return;
active_input_tracking_window->set_automatic_cursor_tracking_enabled(false);
active_input_tracking_window = nullptr;
}
void WindowManager::minimize_windows(Window& window, bool minimized)
{
for_each_window_in_modal_stack(window, [&](auto& w, bool) {
w.set_minimized(minimized);
return IterationDecision::Continue;
});
}
void WindowManager::hide_windows(Window& window, bool hidden)
{
for_each_window_in_modal_stack(window, [&](auto& w, bool) {
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);
if (w.is_minimized())
w.set_minimized(false);
return IterationDecision::Continue;
});
}
void WindowManager::set_pinned(Window& window, bool pinned)
{
for_each_window_in_modal_stack(window, [&](auto& w, bool) {
w.set_pinned(pinned);
return IterationDecision::Continue;
});
}
Gfx::IntPoint WindowManager::get_recommended_window_position(Gfx::IntPoint const& desired)
{
// FIXME: Find a better source for the width and height to shift by.
Gfx::IntPoint shift(8, Gfx::WindowTheme::current().titlebar_height(Gfx::WindowTheme::WindowType::Normal, palette()) + 10);
// FIXME: Find a better source for this.
int taskbar_height = 28;
Window const* overlap_window = nullptr;
current_window_stack().for_each_visible_window_of_type_from_front_to_back(WindowType::Normal, [&](Window& window) {
if (window.default_positioned() && (!overlap_window || overlap_window->window_id() < window.window_id())) {
overlap_window = &window;
}
return IterationDecision::Continue;
});
Gfx::IntPoint point;
if (overlap_window) {
auto& screen = Screen::closest_to_location(desired);
point = overlap_window->position() + shift;
point = { point.x() % screen.width(),
(point.y() >= (screen.height() - (screen.is_main_screen() ? taskbar_height : 0)))
? Gfx::WindowTheme::current().titlebar_height(Gfx::WindowTheme::WindowType::Normal, palette())
: point.y() };
} else {
point = desired;
}
return point;
}
void WindowManager::reload_icon_bitmaps_after_scale_change()
{
reload_config();
for_each_window_stack([&](auto& window_stack) {
window_stack.for_each_window([&](Window& window) {
auto& window_frame = window.frame();
window_frame.theme_changed();
return IterationDecision::Continue;
});
return IterationDecision::Continue;
});
}
void WindowManager::set_window_with_active_menu(Window* window)
{
if (m_window_with_active_menu == window)
return;
if (window)
m_window_with_active_menu = window->make_weak_ptr<Window>();
else
m_window_with_active_menu = nullptr;
}
WindowStack& WindowManager::get_rendering_window_stacks(WindowStack*& transitioning_window_stack)
{
return Compositor::the().get_rendering_window_stacks(transitioning_window_stack);
}
void WindowManager::apply_cursor_theme(const String& theme_name)
{
auto cursor_theme_config = Core::ConfigFile::open(String::formatted("/res/cursor-themes/{}/{}", theme_name, "Config.ini"));
auto* current_cursor = Compositor::the().current_cursor();
auto reload_cursor = [&](RefPtr<Cursor>& cursor, const String& name) {
bool is_current_cursor = current_cursor && current_cursor == cursor.ptr();
static auto const s_default_cursor_path = "/res/cursor-themes/Default/arrow.x2y2.png";
cursor = Cursor::create(String::formatted("/res/cursor-themes/{}/{}", theme_name, cursor_theme_config->read_entry("Cursor", name)), s_default_cursor_path);
if (is_current_cursor) {
Compositor::the().current_cursor_was_reloaded(cursor.ptr());
if (m_hovered_window) {
if (auto* modal_window = const_cast<Window&>(*m_hovered_window).blocking_modal_window()) {
modal_window->set_cursor(cursor);
} else if (m_hovered_window->cursor()) {
m_hovered_window->set_cursor(cursor);
}
}
}
};
reload_cursor(m_hidden_cursor, "Hidden");
reload_cursor(m_arrow_cursor, "Arrow");
reload_cursor(m_hand_cursor, "Hand");
reload_cursor(m_help_cursor, "Help");
reload_cursor(m_resize_horizontally_cursor, "ResizeH");
reload_cursor(m_resize_vertically_cursor, "ResizeV");
reload_cursor(m_resize_diagonally_tlbr_cursor, "ResizeDTLBR");
reload_cursor(m_resize_diagonally_bltr_cursor, "ResizeDBLTR");
reload_cursor(m_resize_column_cursor, "ResizeColumn");
reload_cursor(m_resize_row_cursor, "ResizeRow");
reload_cursor(m_i_beam_cursor, "IBeam");
reload_cursor(m_disallowed_cursor, "Disallowed");
reload_cursor(m_move_cursor, "Move");
reload_cursor(m_drag_cursor, "Drag");
reload_cursor(m_wait_cursor, "Wait");
reload_cursor(m_crosshair_cursor, "Crosshair");
reload_cursor(m_eyedropper_cursor, "Eyedropper");
reload_cursor(m_zoom_cursor, "Zoom");
Compositor::the().invalidate_cursor();
m_config->write_entry("Mouse", "CursorTheme", theme_name);
}
}
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