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WSWindowManager: Ensure that we pick a single window to deliver a full stream of events to

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This is effectively a mouse grab except that we don't require any client
coordination to request it (which is probably OK, and certainly a lot
simpler to implement).

This prevents e.g. dragging the mouse cursor out of paint and over the
terminal from selecting text unexpectedly.
This commit is contained in:
Robin Burchell 2019-06-28 15:11:08 +02:00 committed by Andreas Kling
parent d0a2668833
commit 8a1a9e78d7
Notes: sideshowbarker 2024-07-19 13:18:56 +09:00 
Author: https://github.com/rburchell
Commit: https://github.com/SerenityOS/serenity/commit/8a1a9e78d7f
Pull-request: https://github.com/SerenityOS/serenity/pull/251
Reviewed-by: https://github.com/awesomekling ✅
2 changed files with 54 additions and 34 deletions
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87
Servers/WindowServer/WSWindowManager.cpp
View File

@ -703,27 +703,42 @@ void WSWindowManager::process_mouse_event(WSMouseEvent& event, WSWindow*& hovere
WSWindow* event_window_with_frame = nullptr;
for_each_visible_window_from_front_to_back([&](WSWindow& window) {
auto window_frame_rect = window.frame().rect();
if (!window_frame_rect.contains(event.position()))
return IterationDecision::Continue;
if (m_active_input_window) {
// 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. dragging on one window out of the bounds starting
// a drag in that other unrelated window, and other silly shennanigans.
auto translated_event = event.translated(-m_active_input_window->position());
deliver_mouse_event(*m_active_input_window, translated_event);
if (event.type() == WSEvent::MouseUp && event.buttons() == 0) {
m_active_input_window = nullptr;
}
} else {
for_each_visible_window_from_front_to_back([&](WSWindow& window) {
auto window_frame_rect = window.frame().rect();
if (!window_frame_rect.contains(event.position()))
return IterationDecision::Continue;
if (&window != m_resize_candidate.ptr())
clear_resize_candidate();
if (&window != m_resize_candidate.ptr())
clear_resize_candidate();
// First check if we should initiate a drag or resize (Logo+LMB or Logo+RMB).
// In those cases, the event is swallowed by the window manager.
if (window.type() == WSWindowType::Normal) {
if (!window.is_fullscreen() && m_keyboard_modifiers == Mod_Logo && event.type() == WSEvent::MouseDown && event.button() == MouseButton::Left) {
hovered_window = &window;
start_window_drag(window, event);
return IterationDecision::Break;
}
if (window.is_resizable() && m_keyboard_modifiers == Mod_Logo && event.type() == WSEvent::MouseDown && event.button() == MouseButton::Right && !window.is_blocked_by_modal_window()) {
hovered_window = &window;
start_window_resize(window, event);
return IterationDecision::Break;
// First check if we should initiate a drag or resize (Logo+LMB or Logo+RMB).
// In those cases, the event is swallowed by the window manager.
if (window.type() == WSWindowType::Normal) {
if (!window.is_fullscreen() && m_keyboard_modifiers == Mod_Logo && event.type() == WSEvent::MouseDown && event.button() == MouseButton::Left) {
hovered_window = &window;
start_window_drag(window, event);
return IterationDecision::Break;
}
if (window.is_resizable() && m_keyboard_modifiers == Mod_Logo && event.type() == WSEvent::MouseDown && event.button() == MouseButton::Right && !window.is_blocked_by_modal_window()) {
hovered_window = &window;
start_window_resize(window, event);
return IterationDecision::Break;
}
}
if (m_keyboard_modifiers == Mod_Logo && event.type() == WSEvent::MouseWheel) {
float opacity_change = -event.wheel_delta() * 0.05f;
float new_opacity = window.opacity() + opacity_change;
@ -735,25 +750,29 @@ void WSWindowManager::process_mouse_event(WSMouseEvent& event, WSWindow*& hovere
window.invalidate();
return IterationDecision::Break;
}
}
// Well okay, let's see if we're hitting the frame or the window inside the frame.
if (window.rect().contains(event.position())) {
if (window.type() == WSWindowType::Normal && event.type() == WSEvent::MouseDown)
move_to_front_and_make_active(window);
hovered_window = &window;
if (!window.global_cursor_tracking() && !windows_who_received_mouse_event_due_to_cursor_tracking.contains(&window)) {
auto translated_event = event.translated(-window.position());
deliver_mouse_event(window, translated_event);
// Well okay, let's see if we're hitting the frame or the window inside the frame.
if (window.rect().contains(event.position())) {
if (window.type() == WSWindowType::Normal && event.type() == WSEvent::MouseDown)
move_to_front_and_make_active(window);
hovered_window = &window;
if (!window.global_cursor_tracking() && !windows_who_received_mouse_event_due_to_cursor_tracking.contains(&window)) {
auto translated_event = event.translated(-window.position());
deliver_mouse_event(window, translated_event);
if (event.type() == WSEvent::MouseDown) {
m_active_input_window = window.make_weak_ptr();
}
}
return IterationDecision::Break;
}
return IterationDecision::Break;
}
// We are hitting the frame, pass the event along to WSWindowFrame.
window.frame().on_mouse_event(event.translated(-window_frame_rect.location()));
event_window_with_frame = &window;
return IterationDecision::Break;
});
// We are hitting the frame, pass the event along to WSWindowFrame.
window.frame().on_mouse_event(event.translated(-window_frame_rect.location()));
event_window_with_frame = &window;
return IterationDecision::Break;
});
}
if (event_window_with_frame != m_resize_candidate.ptr())
clear_resize_candidate();

1
Servers/WindowServer/WSWindowManager.h
View File

@ -220,6 +220,7 @@ private:
WeakPtr<WSWindow> m_active_window;
WeakPtr<WSWindow> m_hovered_window;
WeakPtr<WSWindow> m_highlight_window;
WeakPtr<WSWindow> m_active_input_window;
WeakPtr<WSWindow> m_drag_window;
Point m_drag_origin;