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// Copyright (c) 2012 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 "build/build_config.h"
#include "ui/views/controls/scrollbar/native_scroll_bar.h"
#include "ui/views/controls/scrollbar/native_scroll_bar_views.h"
#include "ui/views/controls/scrollbar/scroll_bar.h"
#include "ui/views/test/views_test_base.h"
#include "ui/views/widget/widget.h"
namespace {
// The Scrollbar controller. This is the widget that should do the real
// scrolling of contents.
class TestScrollBarController : public views::ScrollBarController {
public:
virtual ~TestScrollBarController() {}
void ScrollToPosition(views::ScrollBar* source, int position) override {
last_source = source;
last_position = position;
}
int GetScrollIncrement(views::ScrollBar* source,
bool is_page,
bool is_positive) override {
last_source = source;
last_is_page = is_page;
last_is_positive = is_positive;
if (is_page)
return 20;
return 10;
}
// We save the last values in order to assert the correctness of the scroll
// operation.
views::ScrollBar* last_source;
bool last_is_positive;
bool last_is_page;
int last_position;
};
} // namespace
namespace views {
class NativeScrollBarTest : public ViewsTestBase {
public:
NativeScrollBarTest() : widget_(NULL), scrollbar_(NULL) {}
void SetUp() override {
ViewsTestBase::SetUp();
controller_.reset(new TestScrollBarController());
ASSERT_FALSE(scrollbar_);
native_scrollbar_ = new NativeScrollBar(true);
native_scrollbar_->SetBounds(0, 0, 100, 100);
native_scrollbar_->set_controller(controller_.get());
widget_ = new Widget;
Widget::InitParams params = CreateParams(Widget::InitParams::TYPE_POPUP);
params.bounds = gfx::Rect(0, 0, 100, 100);
widget_->Init(params);
View* container = new View();
widget_->SetContentsView(container);
container->AddChildView(native_scrollbar_);
scrollbar_ =
static_cast<NativeScrollBarViews*>(native_scrollbar_->native_wrapper_);
scrollbar_->SetBounds(0, 0, 100, 100);
scrollbar_->Update(100, 1000, 0);
track_size_ = scrollbar_->GetTrackBounds().width();
}
void TearDown() override {
widget_->Close();
ViewsTestBase::TearDown();
}
protected:
Widget* widget_;
// This is the native scrollbar the Views one wraps around.
NativeScrollBar* native_scrollbar_;
// This is the Views scrollbar.
BaseScrollBar* scrollbar_;
// Keep track of the size of the track. This is how we can tell when we
// scroll to the middle.
int track_size_;
scoped_ptr<TestScrollBarController> controller_;
};
// TODO(dnicoara) Can't run the test on Windows since the scrollbar |Part|
// isn't handled in NativeTheme.
#if defined(OS_WIN)
#define MAYBE_Scrolling DISABLED_Scrolling
#define MAYBE_ScrollBarFitsToBottom DISABLED_ScrollBarFitsToBottom
#else
#define MAYBE_Scrolling Scrolling
#define MAYBE_ScrollBarFitsToBottom ScrollBarFitsToBottom
#endif
TEST_F(NativeScrollBarTest, MAYBE_Scrolling) {
EXPECT_EQ(0, scrollbar_->GetPosition());
EXPECT_EQ(900, scrollbar_->GetMaxPosition());
EXPECT_EQ(0, scrollbar_->GetMinPosition());
// Scroll to middle.
scrollbar_->ScrollToThumbPosition(track_size_ / 2, true);
EXPECT_EQ(450, controller_->last_position);
EXPECT_EQ(native_scrollbar_, controller_->last_source);
// Scroll to the end.
scrollbar_->ScrollToThumbPosition(track_size_, true);
EXPECT_EQ(900, controller_->last_position);
// Overscroll. Last position should be the maximum position.
scrollbar_->ScrollToThumbPosition(track_size_ + 100, true);
EXPECT_EQ(900, controller_->last_position);
// Underscroll. Last position should be the minimum position.
scrollbar_->ScrollToThumbPosition(-10, false);
EXPECT_EQ(0, controller_->last_position);
// Test the different fixed scrolling amounts. Generally used by buttons,
// or click on track.
scrollbar_->ScrollToThumbPosition(0, false);
scrollbar_->ScrollByAmount(BaseScrollBar::SCROLL_NEXT_LINE);
EXPECT_EQ(10, controller_->last_position);
scrollbar_->ScrollByAmount(BaseScrollBar::SCROLL_PREV_LINE);
EXPECT_EQ(0, controller_->last_position);
scrollbar_->ScrollByAmount(BaseScrollBar::SCROLL_NEXT_PAGE);
EXPECT_EQ(20, controller_->last_position);
scrollbar_->ScrollByAmount(BaseScrollBar::SCROLL_PREV_PAGE);
EXPECT_EQ(0, controller_->last_position);
}
TEST_F(NativeScrollBarTest, MAYBE_ScrollBarFitsToBottom) {
scrollbar_->Update(100, 1999, 0);
EXPECT_EQ(0, scrollbar_->GetPosition());
EXPECT_EQ(1899, scrollbar_->GetMaxPosition());
EXPECT_EQ(0, scrollbar_->GetMinPosition());
// Scroll to the midpoint of the document.
scrollbar_->Update(100, 1999, 950);
EXPECT_EQ((scrollbar_->GetTrackBounds().width() -
scrollbar_->GetThumbSizeForTest()) /
2,
scrollbar_->GetPosition());
// Scroll to the end of the document.
scrollbar_->Update(100, 1999, 1899);
EXPECT_EQ(
scrollbar_->GetTrackBounds().width() - scrollbar_->GetThumbSizeForTest(),
scrollbar_->GetPosition());
}
TEST_F(NativeScrollBarTest, ScrollToEndAfterShrinkAndExpand) {
// Scroll to the end of the content.
scrollbar_->Update(100, 1001, 0);
EXPECT_TRUE(scrollbar_->ScrollByContentsOffset(-1));
// Shrink and then re-expand the content.
scrollbar_->Update(100, 1000, 0);
scrollbar_->Update(100, 1001, 0);
// Ensure the scrollbar allows scrolling to the end.
EXPECT_TRUE(scrollbar_->ScrollByContentsOffset(-1));
}
TEST_F(NativeScrollBarTest, ThumbFullLengthOfTrack) {
// Shrink content so that it fits within the viewport.
scrollbar_->Update(100, 10, 0);
EXPECT_EQ(scrollbar_->GetTrackBounds().width(),
scrollbar_->GetThumbSizeForTest());
// Emulate a click on the full size scroll bar.
scrollbar_->ScrollToThumbPosition(0, false);
EXPECT_EQ(0, scrollbar_->GetPosition());
// Emulate a key down.
scrollbar_->ScrollByAmount(BaseScrollBar::SCROLL_NEXT_LINE);
EXPECT_EQ(0, scrollbar_->GetPosition());
// Expand content so that it fits *exactly* within the viewport.
scrollbar_->Update(100, 100, 0);
EXPECT_EQ(scrollbar_->GetTrackBounds().width(),
scrollbar_->GetThumbSizeForTest());
// Emulate a click on the full size scroll bar.
scrollbar_->ScrollToThumbPosition(0, false);
EXPECT_EQ(0, scrollbar_->GetPosition());
// Emulate a key down.
scrollbar_->ScrollByAmount(BaseScrollBar::SCROLL_NEXT_LINE);
EXPECT_EQ(0, scrollbar_->GetPosition());
}
} // namespace views
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