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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ash/accessibility/ui/accessibility_focus_ring_group.h"
#include <array>
#include <memory>
#include <vector>
#include "ash/accessibility/ui/accessibility_focus_ring.h"
#include "ash/accessibility/ui/accessibility_focus_ring_layer.h"
#include "ash/accessibility/ui/accessibility_layer.h"
#include "ash/test/ash_test_base.h"
#include "third_party/skia/include/core/SkColor.h"
#include "ui/gfx/geometry/rect.h"
namespace ash {
class TestableAccessibilityFocusRingGroup : public AccessibilityFocusRingGroup {
public:
TestableAccessibilityFocusRingGroup() : AccessibilityFocusRingGroup() {
// By default use an easy round number for testing.
margin_ = 10;
}
TestableAccessibilityFocusRingGroup(
const TestableAccessibilityFocusRingGroup&) = delete;
TestableAccessibilityFocusRingGroup& operator=(
const TestableAccessibilityFocusRingGroup&) = delete;
~TestableAccessibilityFocusRingGroup() override = default;
void RectsToRings(const std::vector<gfx::Rect>& rects,
std::vector<AccessibilityFocusRing>* rings) const {
AccessibilityFocusRingGroup::RectsToRings(rects, rings);
}
int GetMargin() const override { return margin_; }
private:
int margin_;
};
class AccessibilityFocusRingGroupTest : public AshTestBase {
public:
AccessibilityFocusRingGroupTest() {
AccessibilityFocusRing::set_screen_bounds_for_testing(
gfx::Rect(0, 0, 1000, 500));
}
~AccessibilityFocusRingGroupTest() override = default;
protected:
gfx::Rect AddMargin(gfx::Rect r) {
r.Inset(-group_.GetMargin());
return r;
}
TestableAccessibilityFocusRingGroup group_;
};
TEST_F(AccessibilityFocusRingGroupTest, ClipToBounds) {
// Test the ClipToBounds function, which takes an offscreen rect and preserves
// the dimensions that are within bounds, and snaps the dimensions that are
// out of bounds to the edges. This lets the code to create points work
// properly, while ensuring all sides of the focus ring are visible.
int length = 100;
gfx::Rect screen(0, 0, 1000, 1000);
gfx::Rect offTop(100, -1000, length, length);
gfx::Rect expected(100, 0, length, 0);
AccessibilityFocusRing::ClipToBounds(&offTop, screen);
ASSERT_EQ(expected, offTop);
gfx::Rect offBottom(100, 5000, length, length);
expected = gfx::Rect(100, 1000, length, 0);
AccessibilityFocusRing::ClipToBounds(&offBottom, screen);
ASSERT_EQ(expected, offBottom);
gfx::Rect offLeft(-1000, 100, length, length);
expected = gfx::Rect(0, 100, 0, length);
AccessibilityFocusRing::ClipToBounds(&offLeft, screen);
ASSERT_EQ(expected, offLeft);
gfx::Rect offRight(5000, 100, length, length);
expected = gfx::Rect(1000, 100, 0, length);
AccessibilityFocusRing::ClipToBounds(&offRight, screen);
ASSERT_EQ(expected, offRight);
gfx::Rect offCorner(-1000, -1000, length, length);
expected = gfx::Rect(0, 0, 0, 0);
AccessibilityFocusRing::ClipToBounds(&offCorner, screen);
ASSERT_EQ(expected, offCorner);
}
TEST_F(AccessibilityFocusRingGroupTest, RectsToRingsSimpleBoundsCheck) {
// Easy confidence check. Given a single rectangle, make sure we get back
// a focus ring with the same bounds.
std::vector<gfx::Rect> rects;
rects.push_back(gfx::Rect(20, 30, 70, 150));
std::vector<AccessibilityFocusRing> rings;
group_.RectsToRings(rects, &rings);
ASSERT_EQ(1U, rings.size());
ASSERT_EQ(AddMargin(rects[0]), rings[0].GetBounds());
}
TEST_F(AccessibilityFocusRingGroupTest, RectsToRingsTinyRect) {
// A single, very small rect can lead to error conditions.
// Test that it displays as expected.
std::vector<gfx::Rect> rects;
rects.push_back(gfx::Rect(100, 100, group_.GetMargin(), group_.GetMargin()));
std::vector<AccessibilityFocusRing> rings;
group_.RectsToRings(rects, &rings);
ASSERT_EQ(1U, rings.size());
ASSERT_EQ(AddMargin(rects[0]), rings[0].GetBounds());
}
TEST_F(AccessibilityFocusRingGroupTest, RectsToRingsSnapToScreen) {
// Given a rectangle that goes all the way to the screen edges, or off the
// edge, check that we snap the focus ring to the screen, rather than going
// offscreen.
int x = -10; // offscreen
int y = -20; // offscreen
int length = 50;
int padding = AccessibilityFocusRing::GetScreenPaddingForTesting();
std::vector<gfx::Rect> rects;
rects.push_back(gfx::Rect(x, y, length, length));
std::vector<AccessibilityFocusRing> rings;
group_.RectsToRings(rects, &rings);
gfx::Rect result(padding, padding, length + x + group_.GetMargin() - padding,
length + y + group_.GetMargin() - padding);
ASSERT_EQ(1U, rings.size());
ASSERT_EQ(result, rings[0].GetBounds());
}
TEST_F(AccessibilityFocusRingGroupTest, RectsToRingsVerticalStack) {
// Given two rects, one on top of each other, we should get back a
// focus ring that surrounds them both.
std::vector<gfx::Rect> rects;
rects.push_back(gfx::Rect(20, 20, 60, 30));
rects.push_back(gfx::Rect(20, 50, 60, 30));
std::vector<AccessibilityFocusRing> rings;
group_.RectsToRings(rects, &rings);
ASSERT_EQ(1U, rings.size());
ASSERT_EQ(AddMargin(gfx::Rect(20, 20, 60, 60)), rings[0].GetBounds());
}
TEST_F(AccessibilityFocusRingGroupTest, RectsToRingsHorizontalStack) {
// Given two rects, one next to the other horizontally, we should get back a
// focus ring that surrounds them both.
std::vector<gfx::Rect> rects;
rects.push_back(gfx::Rect(20, 20, 60, 30));
rects.push_back(gfx::Rect(80, 20, 60, 30));
std::vector<AccessibilityFocusRing> rings;
group_.RectsToRings(rects, &rings);
ASSERT_EQ(1U, rings.size());
ASSERT_EQ(AddMargin(gfx::Rect(20, 20, 120, 30)), rings[0].GetBounds());
}
TEST_F(AccessibilityFocusRingGroupTest, RectsToRingsParagraphShape) {
// Given a simple paragraph shape, make sure we get something that
// outlines it correctly.
AccessibilityFocusRing::set_screen_bounds_for_testing(
gfx::Rect(0, 0, 1000, 1000));
std::vector<gfx::Rect> rects;
rects.push_back(gfx::Rect(110, 110, 180, 80));
rects.push_back(gfx::Rect(110, 210, 580, 280));
rects.push_back(gfx::Rect(510, 510, 180, 80));
std::vector<AccessibilityFocusRing> rings;
group_.RectsToRings(rects, &rings);
ASSERT_EQ(1U, rings.size());
EXPECT_EQ(gfx::Rect(100, 100, 600, 500), rings[0].GetBounds());
const std::array<gfx::Point, 36>& points = rings[0].points;
EXPECT_EQ(gfx::Point(100, 190), points[0]);
EXPECT_EQ(gfx::Point(100, 110), points[1]);
EXPECT_EQ(gfx::Point(100, 100), points[2]);
EXPECT_EQ(gfx::Point(110, 100), points[3]);
EXPECT_EQ(gfx::Point(290, 100), points[4]);
EXPECT_EQ(gfx::Point(300, 100), points[5]);
EXPECT_EQ(gfx::Point(300, 110), points[6]);
EXPECT_EQ(gfx::Point(300, 190), points[7]);
EXPECT_EQ(gfx::Point(300, 200), points[8]);
EXPECT_EQ(gfx::Point(310, 200), points[9]);
EXPECT_EQ(gfx::Point(690, 200), points[10]);
EXPECT_EQ(gfx::Point(700, 200), points[11]);
EXPECT_EQ(gfx::Point(700, 210), points[12]);
EXPECT_EQ(gfx::Point(700, 490), points[13]);
EXPECT_EQ(gfx::Point(700, 500), points[14]);
EXPECT_EQ(gfx::Point(700, 500), points[15]);
EXPECT_EQ(gfx::Point(700, 500), points[16]);
EXPECT_EQ(gfx::Point(700, 500), points[17]);
EXPECT_EQ(gfx::Point(700, 510), points[18]);
EXPECT_EQ(gfx::Point(700, 590), points[19]);
EXPECT_EQ(gfx::Point(700, 600), points[20]);
EXPECT_EQ(gfx::Point(690, 600), points[21]);
EXPECT_EQ(gfx::Point(510, 600), points[22]);
EXPECT_EQ(gfx::Point(500, 600), points[23]);
EXPECT_EQ(gfx::Point(500, 590), points[24]);
EXPECT_EQ(gfx::Point(500, 510), points[25]);
EXPECT_EQ(gfx::Point(500, 500), points[26]);
EXPECT_EQ(gfx::Point(490, 500), points[27]);
EXPECT_EQ(gfx::Point(110, 500), points[28]);
EXPECT_EQ(gfx::Point(100, 500), points[29]);
EXPECT_EQ(gfx::Point(100, 490), points[30]);
EXPECT_EQ(gfx::Point(100, 210), points[31]);
EXPECT_EQ(gfx::Point(100, 200), points[32]);
EXPECT_EQ(gfx::Point(100, 200), points[33]);
EXPECT_EQ(gfx::Point(100, 200), points[34]);
EXPECT_EQ(gfx::Point(100, 200), points[35]);
}
} // namespace ash
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