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// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "cc/input/main_thread_scrolling_reason.h"
#include "third_party/blink/renderer/core/frame/local_frame_view.h"
#include "third_party/blink/renderer/core/frame/web_local_frame_impl.h"
#include "third_party/blink/renderer/core/geometry/dom_rect.h"
#include "third_party/blink/renderer/core/input/event_handler.h"
#include "third_party/blink/renderer/core/layout/layout_view.h"
#include "third_party/blink/renderer/core/paint/paint_layer_scrollable_area.h"
#include "third_party/blink/renderer/core/testing/sim/sim_request.h"
#include "third_party/blink/renderer/core/testing/sim/sim_test.h"
#include "third_party/blink/renderer/platform/testing/histogram_tester.h"
#include "third_party/blink/renderer/platform/testing/testing_platform_support.h"
#include "third_party/blink/renderer/platform/testing/unit_test_helpers.h"
#define EXPECT_WHEEL_BUCKET(reason, count) \
histogram_tester.ExpectBucketCount( \
"Renderer4.MainThreadWheelScrollReason", \
GetBucketIndex(cc::MainThreadScrollingReason::reason), count);
#define EXPECT_TOUCH_BUCKET(reason, count) \
histogram_tester.ExpectBucketCount( \
"Renderer4.MainThreadGestureScrollReason", \
GetBucketIndex(cc::MainThreadScrollingReason::reason), count);
#define EXPECT_WHEEL_TOTAL(count) \
histogram_tester.ExpectTotalCount("Renderer4.MainThreadWheelScrollReason", \
count);
#define EXPECT_TOUCH_TOTAL(count) \
histogram_tester.ExpectTotalCount("Renderer4.MainThreadGestureScrollReason", \
count);
namespace blink {
namespace {
class ScrollMetricsTest : public SimTest {
public:
void SetUpHtml(const char*);
void Scroll(Element*, const WebGestureDevice);
void UpdateAllLifecyclePhases() {
GetDocument().View()->UpdateAllLifecyclePhases(DocumentUpdateReason::kTest);
}
};
class NonCompositedMainThreadScrollingReasonRecordTest
: public ScrollMetricsTest {
protected:
int GetBucketIndex(uint32_t reason);
};
class ScrollBeginEventBuilder : public WebGestureEvent {
public:
ScrollBeginEventBuilder(FloatPoint position,
FloatPoint delta,
WebGestureDevice device)
: WebGestureEvent(WebInputEvent::kGestureScrollBegin,
WebInputEvent::kNoModifiers,
base::TimeTicks::Now(),
device) {
SetPositionInWidget(position);
SetPositionInScreen(position);
data.scroll_begin.delta_y_hint = delta.Y();
frame_scale_ = 1;
}
};
class ScrollUpdateEventBuilder : public WebGestureEvent {
public:
ScrollUpdateEventBuilder() : WebGestureEvent() {
type_ = WebInputEvent::kGestureScrollUpdate;
data.scroll_update.delta_x = 0.0f;
data.scroll_update.delta_y = 1.0f;
data.scroll_update.velocity_x = 0;
data.scroll_update.velocity_y = 1;
frame_scale_ = 1;
}
};
class ScrollEndEventBuilder : public WebGestureEvent {
public:
ScrollEndEventBuilder() : WebGestureEvent() {
type_ = WebInputEvent::kGestureScrollEnd;
frame_scale_ = 1;
}
};
int NonCompositedMainThreadScrollingReasonRecordTest::GetBucketIndex(
uint32_t reason) {
int index = 1;
while (!(reason & 1)) {
reason >>= 1;
++index;
}
DCHECK_EQ(reason, 1u);
return index;
}
void ScrollMetricsTest::Scroll(Element* element,
const WebGestureDevice device) {
DCHECK(element);
DCHECK(element->getBoundingClientRect());
DOMRect* rect = element->getBoundingClientRect();
ScrollBeginEventBuilder scroll_begin(
FloatPoint(rect->left() + rect->width() / 2,
rect->top() + rect->height() / 2),
FloatPoint(0.f, 1.f), device);
ScrollUpdateEventBuilder scroll_update;
ScrollEndEventBuilder scroll_end;
GetDocument().GetFrame()->GetEventHandler().HandleGestureEvent(scroll_begin);
GetDocument().GetFrame()->GetEventHandler().HandleGestureEvent(scroll_update);
GetDocument().GetFrame()->GetEventHandler().HandleGestureEvent(scroll_end);
ASSERT_GT(scroll_update.DeltaYInRootFrame(), 0);
}
void ScrollMetricsTest::SetUpHtml(const char* html_content) {
WebView().MainFrameWidget()->Resize(WebSize(800, 600));
SimRequest request("https://example.com/test.html", "text/html");
LoadURL("https://example.com/test.html");
request.Complete(html_content);
Compositor().BeginFrame();
}
TEST_F(NonCompositedMainThreadScrollingReasonRecordTest,
TouchAndWheelGeneralTest) {
SetUpHtml(R"HTML(
<style>
.box { overflow:scroll; width: 100px; height: 100px; }
.translucent { opacity: 0.5; }
.spacer { height: 1000px; }
</style>
<div id='box' class='translucent box'>
<div class='spacer'></div>
</div>
)HTML");
UpdateAllLifecyclePhases();
Element* box = GetDocument().getElementById("box");
HistogramTester histogram_tester;
// Test touch scroll.
Scroll(box, WebGestureDevice::kTouchscreen);
EXPECT_TOUCH_BUCKET(kHasOpacityAndLCDText, 1);
EXPECT_TOUCH_BUCKET(kBackgroundNotOpaqueInRectAndLCDText, 1);
Scroll(box, WebGestureDevice::kTouchscreen);
EXPECT_TOUCH_BUCKET(kHasOpacityAndLCDText, 2);
EXPECT_TOUCH_BUCKET(kBackgroundNotOpaqueInRectAndLCDText, 2);
EXPECT_TOUCH_TOTAL(4);
// Test wheel scroll.
Scroll(box, WebGestureDevice::kTouchpad);
EXPECT_WHEEL_BUCKET(kHasOpacityAndLCDText, 1);
EXPECT_WHEEL_BUCKET(kBackgroundNotOpaqueInRectAndLCDText, 1);
EXPECT_WHEEL_TOTAL(2);
}
TEST_F(NonCompositedMainThreadScrollingReasonRecordTest,
CompositedScrollableAreaTest) {
SetUpHtml(R"HTML(
<style>
.box { overflow:scroll; width: 100px; height: 100px; }
.translucent { opacity: 0.5; }
.composited { will-change: transform; }
.spacer { height: 1000px; }
</style>
<div id='box' class='translucent box'>
<div class='spacer'></div>
</div>
)HTML");
GetDocument().View()->SetParentVisible(true);
GetDocument().View()->SetSelfVisible(true);
UpdateAllLifecyclePhases();
Element* box = GetDocument().getElementById("box");
HistogramTester histogram_tester;
Scroll(box, WebGestureDevice::kTouchpad);
EXPECT_WHEEL_BUCKET(kHasOpacityAndLCDText, 1);
EXPECT_WHEEL_BUCKET(kBackgroundNotOpaqueInRectAndLCDText, 1);
EXPECT_WHEEL_TOTAL(2);
box->setAttribute("class", "composited translucent box");
UpdateAllLifecyclePhases();
Scroll(box, WebGestureDevice::kTouchpad);
EXPECT_FALSE(ToLayoutBox(box->GetLayoutObject())
->GetScrollableArea()
->GetNonCompositedMainThreadScrollingReasons());
EXPECT_WHEEL_BUCKET(kHasOpacityAndLCDText, 1);
EXPECT_WHEEL_BUCKET(kBackgroundNotOpaqueInRectAndLCDText, 1);
EXPECT_WHEEL_TOTAL(2);
}
TEST_F(NonCompositedMainThreadScrollingReasonRecordTest,
NotScrollableAreaTest) {
SetUpHtml(R"HTML(
<style>.box { overflow:scroll; width: 100px; height: 100px; }
.translucent { opacity: 0.5; }
.hidden { overflow: hidden; }
.spacer { height: 1000px; }
</style>
<div id='box' class='translucent box'>
<div class='spacer'></div>
</div>
)HTML");
UpdateAllLifecyclePhases();
Element* box = GetDocument().getElementById("box");
HistogramTester histogram_tester;
Scroll(box, WebGestureDevice::kTouchpad);
EXPECT_WHEEL_BUCKET(kHasOpacityAndLCDText, 1);
EXPECT_WHEEL_BUCKET(kBackgroundNotOpaqueInRectAndLCDText, 1);
EXPECT_WHEEL_TOTAL(2);
box->setAttribute("class", "hidden translucent box");
UpdateAllLifecyclePhases();
Scroll(box, WebGestureDevice::kTouchpad);
EXPECT_WHEEL_BUCKET(kHasOpacityAndLCDText, 1);
EXPECT_WHEEL_BUCKET(kBackgroundNotOpaqueInRectAndLCDText, 1);
EXPECT_WHEEL_TOTAL(2);
}
TEST_F(NonCompositedMainThreadScrollingReasonRecordTest, NestedScrollersTest) {
SetUpHtml(R"HTML(
<style>
.container { overflow:scroll; width: 200px; height: 200px; }
.box { overflow:scroll; width: 100px; height: 100px; }
.translucent { opacity: 0.5; }
.transform { transform: scale(0.8); }
.spacer { height: 1000px; }
.composited { will-change: transform; }
</style>
<div id='container' class='container with-border-radius'>
<div class='translucent box'>
<div id='inner' class='composited transform box'>
<div class='spacer'></div>
</div>
<div class='spacer'></div>
</div>
<div class='spacer'></div>
</div>
)HTML");
GetDocument().View()->SetParentVisible(true);
GetDocument().View()->SetSelfVisible(true);
UpdateAllLifecyclePhases();
Element* box = GetDocument().getElementById("inner");
HistogramTester histogram_tester;
Scroll(box, WebGestureDevice::kTouchpad);
// Scrolling the inner box will gather reasons from the scrolling chain. The
// inner box itself has no reason because it's composited. Other scrollable
// areas from the chain have corresponding reasons.
EXPECT_WHEEL_BUCKET(kHasOpacityAndLCDText, 1);
EXPECT_WHEEL_BUCKET(kBackgroundNotOpaqueInRectAndLCDText, 1);
EXPECT_WHEEL_BUCKET(kIsNotStackingContextAndLCDText, 1);
EXPECT_WHEEL_BUCKET(kHasTransformAndLCDText, 0);
EXPECT_WHEEL_TOTAL(3);
}
} // namespace
} // namespace blink
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