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@@ -1,240 +0,0 @@
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-From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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-From: David Sanders <[email protected]>
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-Date: Sun, 2 Apr 2023 05:52:30 -0700
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-Subject: Revert "[X11] Keep WindowCache alive for a time interval"
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-
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-This reverts commit bbc20a9c1b91ac6d6035408748091369cc96d4d7.
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-
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-While intended as a performance improvement, the commit breaks
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-Views menus on X11 after certain window events such as resizing,
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-or maximizing and unmaximizing.
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-
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-The patch can be removed once the upstream issue is fixed. That
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-was reported in https://crbug.com/1429935.
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-
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-diff --git a/ui/base/x/x11_whole_screen_move_loop.cc b/ui/base/x/x11_whole_screen_move_loop.cc
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-index 08e1c09749c5c39d99deec75c1a914c43936a6a5..ccd4785415a743a9519e750d5f0e334632058654 100644
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---- a/ui/base/x/x11_whole_screen_move_loop.cc
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-+++ b/ui/base/x/x11_whole_screen_move_loop.cc
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-@@ -25,6 +25,7 @@
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- #include "ui/events/x/x11_event_translation.h"
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- #include "ui/gfx/x/connection.h"
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- #include "ui/gfx/x/keysyms/keysyms.h"
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-+#include "ui/gfx/x/window_cache.h"
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- #include "ui/gfx/x/x11_window_event_manager.h"
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- #include "ui/gfx/x/xproto.h"
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-
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-@@ -150,6 +151,10 @@ bool X11WholeScreenMoveLoop::RunMoveLoop(
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- auto* connection = x11::Connection::Get();
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- CreateDragInputWindow(connection);
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-
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-+ // Keep a window cache alive for the duration of the drag so that the drop
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-+ // target under the drag window can be quickly determined.
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-+ x11::WindowCache cache(connection, connection->default_root(), true);
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-+
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- // Only grab mouse capture of |grab_input_window_| if |can_grab_pointer| is
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- // true aka the source that initiated the move loop doesn't have explicit
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- // grab.
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-diff --git a/ui/gfx/x/window_cache.cc b/ui/gfx/x/window_cache.cc
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-index 9c603366a657954b4be44d0a30fcf428265f95e7..03885b55354c37e04bc016b509ac2ae8bd6191c2 100644
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---- a/ui/gfx/x/window_cache.cc
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-+++ b/ui/gfx/x/window_cache.cc
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-@@ -11,8 +11,6 @@
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- #include "base/notreached.h"
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- #include "base/ranges/algorithm.h"
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- #include "base/run_loop.h"
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--#include "base/task/single_thread_task_runner.h"
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--#include "base/time/time.h"
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- #include "ui/gfx/geometry/insets.h"
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- #include "ui/gfx/geometry/rect.h"
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- #include "ui/gfx/geometry/vector2d.h"
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-@@ -24,23 +22,19 @@
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-
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- namespace x11 {
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-
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--const base::TimeDelta kDestroyTimerInterval = base::Seconds(3);
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--
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- Window GetWindowAtPoint(const gfx::Point& point_px,
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- const base::flat_set<Window>* ignore) {
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- auto* connection = Connection::Get();
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- Window root = connection->default_root();
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-
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-- if (!WindowCache::instance()) {
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-- auto instance =
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-- std::make_unique<WindowCache>(connection, connection->default_root());
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-- auto* cache = instance.get();
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-- cache->BeginDestroyTimer(std::move(instance));
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-+ if (auto* instance = WindowCache::instance()) {
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-+ instance->WaitUntilReady();
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-+ return instance->GetWindowAtPoint(point_px, root, ignore);
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- }
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-
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-- auto* instance = WindowCache::instance();
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-- instance->WaitUntilReady();
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-- return instance->GetWindowAtPoint(point_px, root, ignore);
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-+ WindowCache cache(connection, connection->default_root(), false);
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-+ cache.WaitUntilReady();
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-+ return cache.GetWindowAtPoint(point_px, root, ignore);
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- }
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-
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- ScopedShapeEventSelector::ScopedShapeEventSelector(Connection* connection,
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-@@ -62,21 +56,24 @@ WindowCache::WindowInfo::~WindowInfo() = default;
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- // static
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- WindowCache* WindowCache::instance_ = nullptr;
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-
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--WindowCache::WindowCache(Connection* connection, Window root)
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-+WindowCache::WindowCache(Connection* connection, Window root, bool track_events)
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- : connection_(connection),
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- root_(root),
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-+ track_events_(track_events),
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- gtk_frame_extents_(GetAtom("_GTK_FRAME_EXTENTS")) {
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- DCHECK(!instance_) << "Only one WindowCache should be active at a time";
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- instance_ = this;
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-
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- connection_->AddEventObserver(this);
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-
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-- // We select for SubstructureNotify events on all windows (to receive
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-- // CreateNotify events), which will cause events to be sent for all child
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-- // windows. This means we need to additionally select for StructureNotify
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-- // changes for the root window.
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-- root_events_ =
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-- std::make_unique<XScopedEventSelector>(root_, EventMask::StructureNotify);
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-+ if (track_events_) {
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-+ // We select for SubstructureNotify events on all windows (to receive
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-+ // CreateNotify events), which will cause events to be sent for all child
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-+ // windows. This means we need to additionally select for StructureNotify
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-+ // changes for the root window.
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-+ root_events_ = std::make_unique<XScopedEventSelector>(
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-+ root_, EventMask::StructureNotify);
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-+ }
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- AddWindow(root_, Window::None);
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- }
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-
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-@@ -106,16 +103,6 @@ void WindowCache::WaitUntilReady() {
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- last_processed_event_ = events[event - 1].sequence();
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- }
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-
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--void WindowCache::BeginDestroyTimer(std::unique_ptr<WindowCache> self) {
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-- DCHECK_EQ(this, self.get());
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-- delete_when_destroy_timer_fires_ = false;
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-- base::SingleThreadTaskRunner::GetCurrentDefault()->PostDelayedTask(
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-- FROM_HERE,
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-- base::BindOnce(&WindowCache::OnDestroyTimerExpired,
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-- base::Unretained(this), std::move(self)),
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-- kDestroyTimerInterval);
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--}
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--
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- void WindowCache::SyncForTest() {
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- do {
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- // Perform a blocking sync to prevent spinning while waiting for replies.
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-@@ -127,7 +114,6 @@ void WindowCache::SyncForTest() {
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- Window WindowCache::GetWindowAtPoint(gfx::Point point_px,
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- Window window,
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- const base::flat_set<Window>* ignore) {
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-- delete_when_destroy_timer_fires_ = true;
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- if (ignore && ignore->contains(window))
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- return Window::None;
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- auto* info = GetInfo(window);
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-@@ -265,10 +251,12 @@ void WindowCache::AddWindow(Window window, Window parent) {
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- return;
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- WindowInfo& info = windows_[window];
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- info.parent = parent;
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-- // Events must be selected before getting the initial window info to
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-- // prevent race conditions.
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-- info.events = std::make_unique<XScopedEventSelector>(
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-- window, EventMask::SubstructureNotify | EventMask::PropertyChange);
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-+ if (track_events_) {
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-+ // Events must be selected before getting the initial window info to
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-+ // prevent race conditions.
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-+ info.events = std::make_unique<XScopedEventSelector>(
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-+ window, EventMask::SubstructureNotify | EventMask::PropertyChange);
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-+ }
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-
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- AddRequest(connection_->GetWindowAttributes(window),
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- &WindowCache::OnGetWindowAttributesResponse, window);
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-@@ -282,8 +270,10 @@ void WindowCache::AddWindow(Window window, Window parent) {
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-
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- auto& shape = connection_->shape();
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- if (shape.present()) {
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-- info.shape_events =
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-- std::make_unique<ScopedShapeEventSelector>(connection_, window);
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-+ if (track_events_) {
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-+ info.shape_events =
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-+ std::make_unique<ScopedShapeEventSelector>(connection_, window);
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-+ }
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-
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- for (auto kind : {Shape::Sk::Bounding, Shape::Sk::Input}) {
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- AddRequest(shape.GetRectangles(window, kind),
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-@@ -391,11 +381,4 @@ void WindowCache::OnGetRectanglesResponse(
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- }
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- }
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-
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--void WindowCache::OnDestroyTimerExpired(std::unique_ptr<WindowCache> self) {
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-- if (!delete_when_destroy_timer_fires_)
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-- return; // destroy `this`
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--
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-- BeginDestroyTimer(std::move(self));
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--}
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--
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- } // namespace x11
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-diff --git a/ui/gfx/x/window_cache.h b/ui/gfx/x/window_cache.h
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-index f241d6c23855fad478813ff3029fa6a17d084d34..ebc05d311ed3719be98180086baae8230ec9c58e 100644
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---- a/ui/gfx/x/window_cache.h
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-+++ b/ui/gfx/x/window_cache.h
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-@@ -78,7 +78,7 @@ class COMPONENT_EXPORT(X11) WindowCache : public EventObserver {
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- // If `track_events` is true, the WindowCache will keep the cache state synced
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- // with the server's state over time. It may be set to false if the cache is
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- // short-lived, if only a single GetWindowAtPoint call is made.
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-- WindowCache(Connection* connection, Window root);
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-+ WindowCache(Connection* connection, Window root, bool track_events);
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- WindowCache(const WindowCache&) = delete;
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- WindowCache& operator=(const WindowCache&) = delete;
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- ~WindowCache() override;
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-@@ -92,10 +92,6 @@ class COMPONENT_EXPORT(X11) WindowCache : public EventObserver {
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- // Blocks until all outstanding requests are processed.
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- void WaitUntilReady();
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-
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-- // Destroys |self| if no calls to GetWindowAtPoint() are made within
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-- // a time window.
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-- void BeginDestroyTimer(std::unique_ptr<WindowCache> self);
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--
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- void SyncForTest();
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-
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- const std::unordered_map<Window, WindowInfo>& windows() const {
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-@@ -147,12 +143,11 @@ class COMPONENT_EXPORT(X11) WindowCache : public EventObserver {
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- Shape::Sk kind,
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- Shape::GetRectanglesResponse response);
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-
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-- void OnDestroyTimerExpired(std::unique_ptr<WindowCache> self);
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--
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- static WindowCache* instance_;
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-
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- const raw_ptr<Connection> connection_;
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- const Window root_;
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-+ const bool track_events_;
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- const Atom gtk_frame_extents_;
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- std::unique_ptr<XScopedEventSelector> root_events_;
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-
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-@@ -164,9 +159,6 @@ class COMPONENT_EXPORT(X11) WindowCache : public EventObserver {
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- // processed in order.
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- absl::optional<uint32_t> last_processed_event_;
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-
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-- // True iff GetWindowAtPoint() was called since the last timer interval.
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-- bool delete_when_destroy_timer_fires_ = false;
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--
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- // Although only one instance of WindowCache may be created at a time, the
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- // instance will be created and destroyed as needed, so WeakPtrs are still
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- // necessary.
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-diff --git a/ui/gfx/x/window_cache_unittest.cc b/ui/gfx/x/window_cache_unittest.cc
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-index 2199ddac2577a33ff7a42f3d3752613cef00dd32..af0a2d3737c132b596096514b5ca4f572d6c9d64 100644
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---- a/ui/gfx/x/window_cache_unittest.cc
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-+++ b/ui/gfx/x/window_cache_unittest.cc
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-@@ -21,7 +21,7 @@ class WindowCacheTest : public testing::Test {
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- protected:
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- void ResetCache() {
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- cache_.reset();
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-- cache_ = std::make_unique<WindowCache>(connection_, root_);
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-+ cache_ = std::make_unique<WindowCache>(connection_, root_, true);
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- cache_->SyncForTest();
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- }
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-
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