// Copyright 2015 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 <utility>
#include "base/bind.h"
#include "base/command_line.h"
#include "base/macros.h"
#include "base/run_loop.h"
#include "base/strings/utf_string_conversions.h"
#include "build/build_config.h"
#include "cc/base/math_util.h"
#include "content/browser/renderer_host/input/synthetic_gesture.h"
#include "content/browser/renderer_host/input/synthetic_smooth_scroll_gesture.h"
#include "content/browser/renderer_host/render_widget_host_impl.h"
#include "content/browser/web_contents/web_contents_impl.h"
#include "content/common/input/synthetic_gesture_params.h"
#include "content/common/input/synthetic_smooth_scroll_gesture_params.h"
#include "content/public/browser/render_view_host.h"
#include "content/public/common/content_switches.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/test_utils.h"
#include "content/shell/browser/shell.h"
namespace {
const char kCompositedScrollingDataURL[] =
"data:text/html;charset=utf-8,"
"<!DOCTYPE html>"
"<meta name='viewport' content='width=device-width'/>"
"<style>"
"#scroller {"
" width:500px;"
" height:500px;"
" overflow:scroll;"
" transform: rotateX(-30deg);"
"}"
"#content {"
" background-color:red;"
" width:1000px;"
" height:1000px;"
"}"
"</style>"
"<div id='scroller'>"
" <div id='content'>"
" </div>"
"</div>"
"<script>"
" document.title='ready';"
"</script>";
} // namespace
namespace content {
class CompositedScrollingBrowserTest : public ContentBrowserTest {
public:
CompositedScrollingBrowserTest() {}
~CompositedScrollingBrowserTest() override {}
void SetUpCommandLine(base::CommandLine* cmd) override {
cmd->AppendSwitch(switches::kEnablePreferCompositingToLCDText);
}
RenderWidgetHostImpl* GetWidgetHost() {
return RenderWidgetHostImpl::From(
shell()->web_contents()->GetRenderViewHost()->GetWidget());
}
void OnSyntheticGestureCompleted(SyntheticGesture::Result result) {
EXPECT_EQ(SyntheticGesture::GESTURE_FINISHED, result);
runner_->Quit();
}
protected:
void LoadURL() {
const GURL data_url(kCompositedScrollingDataURL);
NavigateToURL(shell(), data_url);
RenderWidgetHostImpl* host = GetWidgetHost();
scoped_refptr<FrameWatcher> frame_watcher(new FrameWatcher());
host->GetProcess()->AddFilter(frame_watcher.get());
host->GetView()->SetSize(gfx::Size(400, 400));
base::string16 ready_title(base::ASCIIToUTF16("ready"));
TitleWatcher watcher(shell()->web_contents(), ready_title);
ignore_result(watcher.WaitAndGetTitle());
// We need to wait until at least one frame has been composited
// otherwise the injection of the synthetic gestures may get
// dropped because of MainThread/Impl thread sync of touch event
// regions.
frame_watcher->WaitFrames(1);
}
// ContentBrowserTest:
int ExecuteScriptAndExtractInt(const std::string& script) {
int value = 0;
EXPECT_TRUE(content::ExecuteScriptAndExtractInt(
shell()->web_contents(),
"domAutomationController.send(" + script + ")",
&value));
return value;
}
int GetScrollTop() {
return ExecuteScriptAndExtractInt(
"document.getElementById(\"scroller\").scrollTop");
}
// Generate touch events for a synthetic scroll from |point| for |distance|.
// Returns the distance scrolled.
int DoTouchScroll(const gfx::Point& point, const gfx::Vector2d& distance) {
EXPECT_EQ(0, GetScrollTop());
int scrollHeight = ExecuteScriptAndExtractInt(
"document.getElementById('scroller').scrollHeight");
EXPECT_EQ(1000, scrollHeight);
SyntheticSmoothScrollGestureParams params;
params.gesture_source_type = SyntheticGestureParams::TOUCH_INPUT;
params.anchor = gfx::PointF(point);
params.distances.push_back(-distance);
runner_ = new MessageLoopRunner();
scoped_ptr<SyntheticSmoothScrollGesture> gesture(
new SyntheticSmoothScrollGesture(params));
GetWidgetHost()->QueueSyntheticGesture(
std::move(gesture),
base::Bind(&CompositedScrollingBrowserTest::OnSyntheticGestureCompleted,
base::Unretained(this)));
// Runs until we get the OnSyntheticGestureCompleted callback
runner_->Run();
runner_ = NULL;
return GetScrollTop();
}
private:
scoped_refptr<MessageLoopRunner> runner_;
DISALLOW_COPY_AND_ASSIGN(CompositedScrollingBrowserTest);
};
// Verify transforming a scroller doesn't prevent it from scrolling. See
// crbug.com/543655 for a case where this was broken.
// Disabled on MacOS because it doesn't support touch input.
// Disabled on Android due to flakiness, see https://crbug.com/376668.
#if defined(OS_MACOSX) || defined(OS_ANDROID)
#define MAYBE_Scroll3DTransformedScroller DISABLED_Scroll3DTransformedScroller
#else
#define MAYBE_Scroll3DTransformedScroller Scroll3DTransformedScroller
#endif
IN_PROC_BROWSER_TEST_F(CompositedScrollingBrowserTest,
MAYBE_Scroll3DTransformedScroller) {
LoadURL();
int scrollDistance =
DoTouchScroll(gfx::Point(50, 150), gfx::Vector2d(0, 100));
// The scroll distance is increased due to the rotation of the scroller.
EXPECT_EQ(std::floor(100 / std::cos(cc::MathUtil::Deg2Rad(30.f))) - 1,
scrollDistance);
}
} // namespace content