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// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <tuple>
#include <utility>
#include "base/auto_reset.h"
#include "base/command_line.h"
#include "base/functional/bind.h"
#include "base/run_loop.h"
#include "base/strings/utf_string_conversions.h"
#include "build/build_config.h"
#include "components/input/render_widget_host_input_event_router.h"
#include "content/browser/renderer_host/render_widget_host_impl.h"
#include "content/browser/renderer_host/render_widget_host_view_base.h"
#include "content/browser/web_contents/web_contents_impl.h"
#include "content/common/input/synthetic_smooth_scroll_gesture.h"
#include "content/public/browser/render_view_host.h"
#include "content/public/browser/render_widget_host_view.h"
#include "content/public/common/content_switches.h"
#include "content/public/test/browser_test.h"
#include "content/public/test/browser_test_utils.h"
#include "content/public/test/content_browser_test.h"
#include "content/public/test/content_browser_test_utils.h"
#include "content/public/test/hit_test_region_observer.h"
#include "content/public/test/test_utils.h"
#include "content/shell/browser/shell.h"
#include "third_party/blink/public/common/input/synthetic_web_input_event_builders.h"
#include "third_party/blink/public/common/input/web_input_event.h"
#include "ui/events/base_event_utils.h"
#include "ui/events/event_switches.h"
#include "ui/latency/latency_info.h"
namespace {
// This value has to be larger than the height of the device this test is
// executed on, otherwise the device will be unable to scroll thus failing
// tests.
const int kWebsiteHeight = 10000;
// The event listeners will block the renderer's main thread for both wheel and
// touchstart. This will lead to the compositor impl thread to perform
// scrolling.
const char kCompositorEventAckDataURL[] =
"data:text/html;charset=utf-8,"
"<!DOCTYPE html>"
"<meta name='viewport' content='width=device-width'/>"
"<style>"
"html, body {"
" margin: 0;"
"}"
".spacer { height: 10000px; }"
"</style>"
"<div class=spacer></div>"
"<script>"
" document.addEventListener('wheel', function(e) { while(true) {} }, "
"{'passive': true});"
" document.addEventListener('touchstart', function(e) { while(true) {} }, "
"{'passive': true});"
" document.title='ready';"
"</script>";
// The event listeners will block the renderer's main thread for both
// touchstart and touchend.
const char kPassiveTouchStartBlockingTouchEndDataURL[] =
"data:text/html;charset=utf-8,"
"<!DOCTYPE html>"
"<meta name='viewport' content='width=device-width'/>"
"<style>"
"html, body {"
" margin: 0;"
"}"
".spacer { height: 10000px; }"
"</style>"
"<div class=spacer></div>"
"<script>"
" document.addEventListener('touchstart', function(e) { while(true) {} }, "
"{'passive': true});"
" document.addEventListener('touchend', function(e) { while(true) {} });"
" document.title='ready';"
"</script>";
// The event listeners will block the renderer's main thread for touchstart.
const char kBlockingTouchStartDataURL[] =
"data:text/html;charset=utf-8,"
"<!DOCTYPE html>"
"<meta name='viewport' content='width=device-width'/>"
"<style>"
"html, body {"
" margin: 0;"
"}"
".spacer { height: 10000px; }"
"</style>"
"<div class=spacer></div>"
"<script>"
" document.addEventListener('touchstart', function(e) { while(true) {} }, "
"{'passive': false});"
" document.title='ready';"
"</script>";
} // namespace
namespace content {
// This test will used event listeners which block the renderer's main thread.
// This test verifies that the compositor sends back an event ack that is not
// blocked by the main thread. Then that subsequently the compositor will
// perform scrolling from the impl thread.
class CompositorEventAckBrowserTest : public ContentBrowserTest {
public:
CompositorEventAckBrowserTest() {}
CompositorEventAckBrowserTest(const CompositorEventAckBrowserTest&) = delete;
CompositorEventAckBrowserTest& operator=(
const CompositorEventAckBrowserTest&) = delete;
~CompositorEventAckBrowserTest() override {}
RenderWidgetHostImpl* GetWidgetHost() {
auto* main_frame = shell()->web_contents()->GetPrimaryMainFrame();
return RenderWidgetHostImpl::From(
main_frame->GetRenderViewHost()->GetWidget());
}
void OnSyntheticGestureCompleted(SyntheticGesture::Result result) {
EXPECT_EQ(SyntheticGesture::GESTURE_FINISHED, result);
}
protected:
void LoadURL(const char* page_data) {
const GURL data_url(page_data);
EXPECT_TRUE(NavigateToURL(shell(), data_url));
RenderWidgetHostImpl* host = GetWidgetHost();
host->GetView()->SetSize(gfx::Size(400, 400));
std::u16string ready_title(u"ready");
TitleWatcher watcher(shell()->web_contents(), ready_title);
std::ignore = watcher.WaitAndGetTitle();
// SetSize triggers an animation of the size, leading to a a new
// viz::LocalSurfaceId being generated. Since this was done right after
// navigation Viz could be processing an old surface.
//
// We want the HitTestData for the post resize surface. So wait until that
// surface has submitted a frame.
viz::LocalSurfaceId target = host->GetView()->GetLocalSurfaceId();
RenderFrameSubmissionObserver rfm_observer(
GetWidgetHost()->render_frame_metadata_provider());
while (!rfm_observer.LastRenderFrameMetadata()
.local_surface_id.value_or(viz::LocalSurfaceId())
.is_valid() ||
target !=
rfm_observer.LastRenderFrameMetadata().local_surface_id.value_or(
viz::LocalSurfaceId::MaxSequenceId())) {
rfm_observer.WaitForMetadataChange();
}
HitTestRegionObserver hit_test_observer(host->GetFrameSinkId());
hit_test_observer.WaitForHitTestData();
}
int GetScrollTop() {
return EvalJs(shell(), "document.scrollingElement.scrollTop").ExtractInt();
}
void DoWheelScroll() {
EXPECT_EQ(0, GetScrollTop());
EXPECT_EQ(kWebsiteHeight,
EvalJs(shell(), "document.documentElement.scrollHeight"));
RenderFrameSubmissionObserver observer(
GetWidgetHost()->render_frame_metadata_provider());
auto input_msg_watcher = std::make_unique<InputMsgWatcher>(
GetWidgetHost(), blink::WebInputEvent::Type::kMouseWheel);
// This event never completes its processing. As kCompositorEventAckDataURL
// will block the renderer's main thread once it is received.
blink::WebMouseWheelEvent wheel_event =
blink::SyntheticWebMouseWheelEventBuilder::Build(
10, 10, 0, -53, 0, ui::ScrollGranularity::kScrollByPrecisePixel);
wheel_event.phase = blink::WebMouseWheelEvent::kPhaseBegan;
GetWidgetHost()->ForwardWheelEvent(wheel_event);
// The compositor should send the event ack, and not be blocked by the event
// above. The event watcher runs until we get the InputMsgAck callback
EXPECT_EQ(blink::mojom::InputEventResultState::kSetNonBlocking,
input_msg_watcher->WaitForAck());
// Expect that the compositor scrolled at least one pixel while the
// main thread was in a busy loop.
gfx::PointF default_scroll_offset;
while (observer.LastRenderFrameMetadata()
.root_scroll_offset.value_or(default_scroll_offset)
.y() <= 0) {
observer.WaitForMetadataChange();
}
}
void DoTouchScroll() {
EXPECT_EQ(0, GetScrollTop());
EXPECT_EQ(kWebsiteHeight,
EvalJs(shell(), "document.documentElement.scrollHeight"));
RenderFrameSubmissionObserver observer(
GetWidgetHost()->render_frame_metadata_provider());
SyntheticSmoothScrollGestureParams params;
params.gesture_source_type = content::mojom::GestureSourceType::kTouchInput;
params.anchor = gfx::PointF(50, 50);
params.distances.push_back(gfx::Vector2d(0, -45));
std::unique_ptr<SyntheticSmoothScrollGesture> gesture(
new SyntheticSmoothScrollGesture(params));
GetWidgetHost()->QueueSyntheticGesture(
std::move(gesture),
base::BindOnce(
&CompositorEventAckBrowserTest::OnSyntheticGestureCompleted,
base::Unretained(this)));
// Expect that the compositor scrolled at least one pixel while the
// main thread was in a busy loop.
gfx::PointF default_scroll_offset;
while (observer.LastRenderFrameMetadata()
.root_scroll_offset.value_or(default_scroll_offset)
.y() <= 0) {
observer.WaitForMetadataChange();
}
}
};
IN_PROC_BROWSER_TEST_F(CompositorEventAckBrowserTest, MouseWheel) {
LoadURL(kCompositorEventAckDataURL);
DoWheelScroll();
}
// Disabled on MacOS because it doesn't support touch input.
#if BUILDFLAG(IS_MAC)
#define MAYBE_TouchStart DISABLED_TouchStart
#else
#define MAYBE_TouchStart TouchStart
#endif
IN_PROC_BROWSER_TEST_F(CompositorEventAckBrowserTest, MAYBE_TouchStart) {
LoadURL(kCompositorEventAckDataURL);
DoTouchScroll();
}
// Disabled on MacOS because it doesn't support touch input.
#if BUILDFLAG(IS_MAC)
#define MAYBE_TouchStartDuringFling DISABLED_TouchStartDuringFling
#else
#define MAYBE_TouchStartDuringFling TouchStartDuringFling
#endif
IN_PROC_BROWSER_TEST_F(CompositorEventAckBrowserTest,
MAYBE_TouchStartDuringFling) {
LoadURL(kBlockingTouchStartDataURL);
// Send the touch events via routing since they need to be registered by the
// TouchEventAckQueue.
auto* root_view = GetWidgetHost()->GetView();
auto* input_event_router = GetWidgetHost()->delegate()->GetInputEventRouter();
// Send a TouchStart so that we can set allowed touch action to Auto.
blink::SyntheticWebTouchEvent touch_event;
touch_event.PressPoint(50, 50);
touch_event.SetTimeStamp(ui::EventTimeForNow());
input_event_router->RouteTouchEvent(root_view, &touch_event,
ui::LatencyInfo());
// Send GSB to start scrolling sequence.
blink::WebGestureEvent gesture_scroll_begin(
blink::WebGestureEvent::Type::kGestureScrollBegin,
blink::WebInputEvent::kNoModifiers, ui::EventTimeForNow());
gesture_scroll_begin.SetSourceDevice(blink::WebGestureDevice::kTouchscreen);
gesture_scroll_begin.data.scroll_begin.delta_hint_units =
ui::ScrollGranularity::kScrollByPrecisePixel;
gesture_scroll_begin.data.scroll_begin.delta_x_hint = 0.f;
gesture_scroll_begin.data.scroll_begin.delta_y_hint = -5.f;
GetWidgetHost()->ForwardGestureEvent(gesture_scroll_begin);
// Send a GFS and wait for the page to scroll making sure that fling progress
// has started.
blink::WebGestureEvent gesture_fling_start(
blink::WebGestureEvent::Type::kGestureFlingStart,
blink::WebInputEvent::kNoModifiers, ui::EventTimeForNow());
gesture_fling_start.SetSourceDevice(blink::WebGestureDevice::kTouchscreen);
gesture_fling_start.data.fling_start.velocity_x = 0.f;
gesture_fling_start.data.fling_start.velocity_y = -2000.f;
GetWidgetHost()->ForwardGestureEvent(gesture_fling_start);
RenderFrameSubmissionObserver observer(
GetWidgetHost()->render_frame_metadata_provider());
gfx::PointF default_scroll_offset;
while (observer.LastRenderFrameMetadata()
.root_scroll_offset.value_or(default_scroll_offset)
.y() <= 0)
observer.WaitForMetadataChange();
touch_event.ReleasePoint(0);
// TODO(wjmaclean): Figure out why we can send two touch events with the same
// id, and not only does it work, it fails to work if we give the second
// event a unique id!
// touch_event.unique_touch_event_id = ui::GetNextTouchEventId();
input_event_router->RouteTouchEvent(root_view, &touch_event,
ui::LatencyInfo());
touch_event.ResetPoints();
// Send a touch start event and wait for its ack. The touch start must be
// uncancelable since there is an on-going fling with touchscreen source. The
// test will timeout if the touch start event is cancelable since there is a
// busy loop in the blocking touch start event listener.
InputEventAckWaiter touch_start_ack_observer(
GetWidgetHost(), blink::WebInputEvent::Type::kTouchStart);
touch_event.PressPoint(50, 50);
touch_event.SetTimeStamp(ui::EventTimeForNow());
input_event_router->RouteTouchEvent(root_view, &touch_event,
ui::LatencyInfo());
touch_start_ack_observer.Wait();
}
// Disabled on MacOS because it doesn't support touch input.
#if BUILDFLAG(IS_MAC)
#define MAYBE_PassiveTouchStartBlockingTouchEnd \
DISABLED_PassiveTouchStartBlockingTouchEnd
#else
#define MAYBE_PassiveTouchStartBlockingTouchEnd \
PassiveTouchStartBlockingTouchEnd
#endif
IN_PROC_BROWSER_TEST_F(CompositorEventAckBrowserTest,
MAYBE_PassiveTouchStartBlockingTouchEnd) {
LoadURL(kPassiveTouchStartBlockingTouchEndDataURL);
DoTouchScroll();
}
} // namespace content
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