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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 "ui/views/controls/scroll_view.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace views {
namespace {
// View implementation that allows setting the preferred size.
class CustomView : public View {
public:
CustomView() {}
void SetPreferredSize(const gfx::Size& size) {
preferred_size_ = size;
PreferredSizeChanged();
}
virtual gfx::Size GetPreferredSize() OVERRIDE {
return preferred_size_;
}
virtual void Layout() OVERRIDE {
gfx::Size pref = GetPreferredSize();
int width = pref.width();
int height = pref.height();
if (parent()) {
width = std::max(parent()->width(), width);
height = std::max(parent()->height(), height);
}
SetBounds(x(), y(), width, height);
}
private:
gfx::Size preferred_size_;
DISALLOW_COPY_AND_ASSIGN(CustomView);
};
} // namespace
// Verifies the viewport is sized to fit the available space.
TEST(ScrollViewTest, ViewportSizedToFit) {
ScrollView scroll_view;
View* contents = new View;
scroll_view.SetContents(contents);
scroll_view.SetBoundsRect(gfx::Rect(0, 0, 100, 100));
scroll_view.Layout();
EXPECT_EQ("0,0 100x100", contents->parent()->bounds().ToString());
}
// Verifies the scrollbars are added as necessary.
TEST(ScrollViewTest, ScrollBars) {
ScrollView scroll_view;
View* contents = new View;
scroll_view.SetContents(contents);
scroll_view.SetBoundsRect(gfx::Rect(0, 0, 100, 100));
// Size the contents such that vertical scrollbar is needed.
contents->SetBounds(0, 0, 50, 400);
scroll_view.Layout();
EXPECT_EQ(100 - scroll_view.GetScrollBarWidth(), contents->parent()->width());
EXPECT_EQ(100, contents->parent()->height());
EXPECT_TRUE(!scroll_view.horizontal_scroll_bar() ||
!scroll_view.horizontal_scroll_bar()->visible());
ASSERT_TRUE(scroll_view.vertical_scroll_bar() != NULL);
EXPECT_TRUE(scroll_view.vertical_scroll_bar()->visible());
// Size the contents such that horizontal scrollbar is needed.
contents->SetBounds(0, 0, 400, 50);
scroll_view.Layout();
EXPECT_EQ(100, contents->parent()->width());
EXPECT_EQ(100 - scroll_view.GetScrollBarHeight(),
contents->parent()->height());
ASSERT_TRUE(scroll_view.horizontal_scroll_bar() != NULL);
EXPECT_TRUE(scroll_view.horizontal_scroll_bar()->visible());
EXPECT_TRUE(!scroll_view.vertical_scroll_bar() ||
!scroll_view.vertical_scroll_bar()->visible());
// Both horizontal and vertical.
contents->SetBounds(0, 0, 300, 400);
scroll_view.Layout();
EXPECT_EQ(100 - scroll_view.GetScrollBarWidth(), contents->parent()->width());
EXPECT_EQ(100 - scroll_view.GetScrollBarHeight(),
contents->parent()->height());
ASSERT_TRUE(scroll_view.horizontal_scroll_bar() != NULL);
EXPECT_TRUE(scroll_view.horizontal_scroll_bar()->visible());
ASSERT_TRUE(scroll_view.vertical_scroll_bar() != NULL);
EXPECT_TRUE(scroll_view.vertical_scroll_bar()->visible());
}
// Assertions around adding a header.
TEST(ScrollViewTest, Header) {
ScrollView scroll_view;
View* contents = new View;
CustomView* header = new CustomView;
scroll_view.SetHeader(header);
View* header_parent = header->parent();
scroll_view.SetContents(contents);
scroll_view.SetBoundsRect(gfx::Rect(0, 0, 100, 100));
scroll_view.Layout();
// |header|s preferred size is empty, which should result in all space going
// to contents.
EXPECT_EQ("0,0 100x0", header->parent()->bounds().ToString());
EXPECT_EQ("0,0 100x100", contents->parent()->bounds().ToString());
// Get the header a height of 20.
header->SetPreferredSize(gfx::Size(10, 20));
EXPECT_EQ("0,0 100x20", header->parent()->bounds().ToString());
EXPECT_EQ("0,20 100x80", contents->parent()->bounds().ToString());
// Remove the header.
scroll_view.SetHeader(NULL);
// SetHeader(NULL) deletes header.
header = NULL;
EXPECT_EQ("0,0 100x0", header_parent->bounds().ToString());
EXPECT_EQ("0,0 100x100", contents->parent()->bounds().ToString());
}
// Verifies the scrollbars are added as necessary when a header is present.
TEST(ScrollViewTest, ScrollBarsWithHeader) {
ScrollView scroll_view;
View* contents = new View;
scroll_view.SetContents(contents);
CustomView* header = new CustomView;
scroll_view.SetHeader(header);
scroll_view.SetBoundsRect(gfx::Rect(0, 0, 100, 100));
header->SetPreferredSize(gfx::Size(10, 20));
// Size the contents such that vertical scrollbar is needed.
contents->SetBounds(0, 0, 50, 400);
scroll_view.Layout();
EXPECT_EQ(0, contents->parent()->x());
EXPECT_EQ(20, contents->parent()->y());
EXPECT_EQ(100 - scroll_view.GetScrollBarWidth(), contents->parent()->width());
EXPECT_EQ(80, contents->parent()->height());
EXPECT_EQ(0, header->parent()->x());
EXPECT_EQ(0, header->parent()->y());
EXPECT_EQ(100 - scroll_view.GetScrollBarWidth(), header->parent()->width());
EXPECT_EQ(20, header->parent()->height());
EXPECT_TRUE(!scroll_view.horizontal_scroll_bar() ||
!scroll_view.horizontal_scroll_bar()->visible());
ASSERT_TRUE(scroll_view.vertical_scroll_bar() != NULL);
EXPECT_TRUE(scroll_view.vertical_scroll_bar()->visible());
// Size the contents such that horizontal scrollbar is needed.
contents->SetBounds(0, 0, 400, 50);
scroll_view.Layout();
EXPECT_EQ(0, contents->parent()->x());
EXPECT_EQ(20, contents->parent()->y());
EXPECT_EQ(100, contents->parent()->width());
EXPECT_EQ(100 - scroll_view.GetScrollBarHeight() - 20,
contents->parent()->height());
EXPECT_EQ(0, header->parent()->x());
EXPECT_EQ(0, header->parent()->y());
EXPECT_EQ(100, header->parent()->width());
EXPECT_EQ(20, header->parent()->height());
ASSERT_TRUE(scroll_view.horizontal_scroll_bar() != NULL);
EXPECT_TRUE(scroll_view.horizontal_scroll_bar()->visible());
EXPECT_TRUE(!scroll_view.vertical_scroll_bar() ||
!scroll_view.vertical_scroll_bar()->visible());
// Both horizontal and vertical.
contents->SetBounds(0, 0, 300, 400);
scroll_view.Layout();
EXPECT_EQ(0, contents->parent()->x());
EXPECT_EQ(20, contents->parent()->y());
EXPECT_EQ(100 - scroll_view.GetScrollBarWidth(), contents->parent()->width());
EXPECT_EQ(100 - scroll_view.GetScrollBarHeight() - 20,
contents->parent()->height());
EXPECT_EQ(0, header->parent()->x());
EXPECT_EQ(0, header->parent()->y());
EXPECT_EQ(100 - scroll_view.GetScrollBarWidth(), header->parent()->width());
EXPECT_EQ(20, header->parent()->height());
ASSERT_TRUE(scroll_view.horizontal_scroll_bar() != NULL);
EXPECT_TRUE(scroll_view.horizontal_scroll_bar()->visible());
ASSERT_TRUE(scroll_view.vertical_scroll_bar() != NULL);
EXPECT_TRUE(scroll_view.vertical_scroll_bar()->visible());
}
// Verifies the header scrolls horizontally with the content.
TEST(ScrollViewTest, HeaderScrollsWithContent) {
ScrollView scroll_view;
CustomView* contents = new CustomView;
scroll_view.SetContents(contents);
contents->SetPreferredSize(gfx::Size(500, 500));
CustomView* header = new CustomView;
scroll_view.SetHeader(header);
header->SetPreferredSize(gfx::Size(500, 20));
scroll_view.SetBoundsRect(gfx::Rect(0, 0, 100, 100));
EXPECT_EQ("0,0", contents->bounds().origin().ToString());
EXPECT_EQ("0,0", header->bounds().origin().ToString());
// Scroll the horizontal scrollbar.
ASSERT_TRUE(scroll_view.horizontal_scroll_bar());
scroll_view.ScrollToPosition(
const_cast<ScrollBar*>(scroll_view.horizontal_scroll_bar()), 1);
EXPECT_EQ("-1,0", contents->bounds().origin().ToString());
EXPECT_EQ("-1,0", header->bounds().origin().ToString());
// Scrolling the vertical scrollbar shouldn't effect the header.
ASSERT_TRUE(scroll_view.vertical_scroll_bar());
scroll_view.ScrollToPosition(
const_cast<ScrollBar*>(scroll_view.vertical_scroll_bar()), 1);
EXPECT_EQ("-1,-1", contents->bounds().origin().ToString());
EXPECT_EQ("-1,0", header->bounds().origin().ToString());
}
// Verifies ScrollRectToVisible() on the child works.
TEST(ScrollViewTest, ScrollRectToVisible) {
ScrollView scroll_view;
CustomView* contents = new CustomView;
scroll_view.SetContents(contents);
contents->SetPreferredSize(gfx::Size(500, 1000));
scroll_view.SetBoundsRect(gfx::Rect(0, 0, 100, 100));
scroll_view.Layout();
EXPECT_EQ("0,0", contents->bounds().origin().ToString());
// Scroll to y=405 height=10, this should make the y position of the content
// at (405 + 10) - viewport_height (scroll region bottom aligned).
contents->ScrollRectToVisible(gfx::Rect(0, 405, 10, 10));
const int viewport_height = contents->parent()->height();
EXPECT_EQ(-(415 - viewport_height), contents->y());
// Scroll to the current y-location and 10x10; should do nothing.
contents->ScrollRectToVisible(gfx::Rect(0, -contents->y(), 10, 10));
EXPECT_EQ(-(415 - viewport_height), contents->y());
}
} // namespace views
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