| // Copyright 2018 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/scroll_snap_data.h" |
| #include <memory> |
| #include "cc/input/snap_selection_strategy.h" |
| |
| #include "testing/gtest/include/gtest/gtest.h" |
| |
| namespace cc { |
| |
| class ScrollSnapDataTest : public testing::Test { |
| public: |
| TargetSnapAreaElementIds target_elements; |
| }; |
| |
| TEST_F(ScrollSnapDataTest, StartAlignmentCalculation) { |
| SnapContainerData container( |
| ScrollSnapType(false, SnapAxis::kBoth, SnapStrictness::kMandatory), |
| gfx::RectF(10, 10, 200, 300), gfx::ScrollOffset(600, 800)); |
| SnapAreaData area(ScrollSnapAlign(SnapAlignment::kStart), |
| gfx::RectF(100, 150, 100, 100), false, ElementId(10)); |
| container.AddSnapAreaData(area); |
| |
| gfx::ScrollOffset snap_position; |
| std::unique_ptr<SnapSelectionStrategy> strategy = |
| SnapSelectionStrategy::CreateForEndPosition(gfx::ScrollOffset(0, 0), true, |
| true); |
| |
| EXPECT_TRUE( |
| container.FindSnapPosition(*strategy, &snap_position, &target_elements)); |
| EXPECT_EQ(90, snap_position.x()); |
| EXPECT_EQ(140, snap_position.y()); |
| EXPECT_EQ(TargetSnapAreaElementIds(ElementId(10), ElementId(10)), |
| target_elements); |
| } |
| |
| TEST_F(ScrollSnapDataTest, CenterAlignmentCalculation) { |
| SnapContainerData container( |
| ScrollSnapType(false, SnapAxis::kBoth, SnapStrictness::kMandatory), |
| gfx::RectF(10, 10, 200, 300), gfx::ScrollOffset(600, 800)); |
| SnapAreaData area(ScrollSnapAlign(SnapAlignment::kCenter), |
| gfx::RectF(100, 150, 100, 100), false, ElementId(10)); |
| container.AddSnapAreaData(area); |
| |
| gfx::ScrollOffset snap_position; |
| std::unique_ptr<SnapSelectionStrategy> strategy = |
| SnapSelectionStrategy::CreateForEndPosition(gfx::ScrollOffset(0, 0), true, |
| true); |
| EXPECT_TRUE( |
| container.FindSnapPosition(*strategy, &snap_position, &target_elements)); |
| EXPECT_EQ(40, snap_position.x()); |
| EXPECT_EQ(40, snap_position.y()); |
| EXPECT_EQ(TargetSnapAreaElementIds(ElementId(10), ElementId(10)), |
| target_elements); |
| } |
| |
| TEST_F(ScrollSnapDataTest, EndAlignmentCalculation) { |
| SnapContainerData container( |
| ScrollSnapType(false, SnapAxis::kBoth, SnapStrictness::kMandatory), |
| gfx::RectF(10, 10, 200, 200), gfx::ScrollOffset(600, 800)); |
| SnapAreaData area(ScrollSnapAlign(SnapAlignment::kEnd), |
| gfx::RectF(150, 200, 100, 100), false, ElementId(10)); |
| container.AddSnapAreaData(area); |
| |
| gfx::ScrollOffset snap_position; |
| std::unique_ptr<SnapSelectionStrategy> strategy = |
| SnapSelectionStrategy::CreateForEndPosition(gfx::ScrollOffset(0, 0), true, |
| true); |
| EXPECT_TRUE( |
| container.FindSnapPosition(*strategy, &snap_position, &target_elements)); |
| EXPECT_EQ(40, snap_position.x()); |
| EXPECT_EQ(90, snap_position.y()); |
| EXPECT_EQ(TargetSnapAreaElementIds(ElementId(10), ElementId(10)), |
| target_elements); |
| } |
| |
| TEST_F(ScrollSnapDataTest, UnreachableSnapPositionCalculation) { |
| SnapContainerData container( |
| ScrollSnapType(false, SnapAxis::kBoth, SnapStrictness::kMandatory), |
| gfx::RectF(0, 0, 200, 200), gfx::ScrollOffset(100, 100)); |
| SnapAreaData area(ScrollSnapAlign(SnapAlignment::kEnd, SnapAlignment::kStart), |
| gfx::RectF(200, 0, 100, 100), false, ElementId(10)); |
| container.AddSnapAreaData(area); |
| |
| gfx::ScrollOffset snap_position; |
| std::unique_ptr<SnapSelectionStrategy> strategy = |
| SnapSelectionStrategy::CreateForEndPosition(gfx::ScrollOffset(50, 50), |
| true, true); |
| EXPECT_TRUE( |
| container.FindSnapPosition(*strategy, &snap_position, &target_elements)); |
| // Aligning to start on x would lead the scroll offset larger than max, and |
| // aligning to end on y would lead the scroll offset smaller than zero. So |
| // we expect these are clamped. |
| EXPECT_EQ(100, snap_position.x()); |
| EXPECT_EQ(0, snap_position.y()); |
| EXPECT_EQ(TargetSnapAreaElementIds(ElementId(10), ElementId(10)), |
| target_elements); |
| } |
| |
| TEST_F(ScrollSnapDataTest, FindsClosestSnapPositionIndependently) { |
| SnapContainerData container( |
| ScrollSnapType(false, SnapAxis::kBoth, SnapStrictness::kMandatory), |
| gfx::RectF(0, 0, 200, 200), gfx::ScrollOffset(600, 800)); |
| SnapAreaData snap_x_only( |
| ScrollSnapAlign(SnapAlignment::kNone, SnapAlignment::kStart), |
| gfx::RectF(80, 0, 150, 150), false, ElementId(10)); |
| SnapAreaData snap_y_only( |
| ScrollSnapAlign(SnapAlignment::kStart, SnapAlignment::kNone), |
| gfx::RectF(0, 70, 150, 150), false, ElementId(20)); |
| SnapAreaData snap_on_both(ScrollSnapAlign(SnapAlignment::kStart), |
| gfx::RectF(50, 150, 150, 150), false, |
| ElementId(30)); |
| container.AddSnapAreaData(snap_x_only); |
| container.AddSnapAreaData(snap_y_only); |
| container.AddSnapAreaData(snap_on_both); |
| |
| gfx::ScrollOffset snap_position; |
| std::unique_ptr<SnapSelectionStrategy> strategy = |
| SnapSelectionStrategy::CreateForEndPosition(gfx::ScrollOffset(100, 100), |
| true, true); |
| EXPECT_TRUE( |
| container.FindSnapPosition(*strategy, &snap_position, &target_elements)); |
| EXPECT_EQ(80, snap_position.x()); |
| EXPECT_EQ(70, snap_position.y()); |
| EXPECT_EQ(TargetSnapAreaElementIds(ElementId(10), ElementId(20)), |
| target_elements); |
| } |
| |
| TEST_F(ScrollSnapDataTest, FindsClosestSnapPositionOnAxisValueBoth) { |
| SnapContainerData container( |
| ScrollSnapType(false, SnapAxis::kBoth, SnapStrictness::kMandatory), |
| gfx::RectF(0, 0, 200, 200), gfx::ScrollOffset(600, 800)); |
| SnapAreaData snap_x_only( |
| ScrollSnapAlign(SnapAlignment::kNone, SnapAlignment::kStart), |
| gfx::RectF(80, 0, 150, 150), false, ElementId(10)); |
| SnapAreaData snap_y_only( |
| ScrollSnapAlign(SnapAlignment::kStart, SnapAlignment::kNone), |
| gfx::RectF(0, 70, 150, 150), false, ElementId(20)); |
| SnapAreaData snap_on_both(ScrollSnapAlign(SnapAlignment::kStart), |
| gfx::RectF(50, 150, 150, 150), false, |
| ElementId(30)); |
| |
| container.AddSnapAreaData(snap_x_only); |
| container.AddSnapAreaData(snap_y_only); |
| container.AddSnapAreaData(snap_on_both); |
| gfx::ScrollOffset snap_position; |
| std::unique_ptr<SnapSelectionStrategy> strategy = |
| SnapSelectionStrategy::CreateForEndPosition(gfx::ScrollOffset(40, 120), |
| true, true); |
| EXPECT_TRUE( |
| container.FindSnapPosition(*strategy, &snap_position, &target_elements)); |
| EXPECT_EQ(50, snap_position.x()); |
| EXPECT_EQ(150, snap_position.y()); |
| EXPECT_EQ(TargetSnapAreaElementIds(ElementId(30), ElementId(30)), |
| target_elements); |
| } |
| |
| TEST_F(ScrollSnapDataTest, DoesNotSnapOnNonScrolledAxis) { |
| SnapContainerData container( |
| ScrollSnapType(false, SnapAxis::kBoth, SnapStrictness::kMandatory), |
| gfx::RectF(0, 0, 200, 200), gfx::ScrollOffset(600, 800)); |
| SnapAreaData snap_x_only( |
| ScrollSnapAlign(SnapAlignment::kNone, SnapAlignment::kStart), |
| gfx::RectF(80, 0, 150, 150), false, ElementId(10)); |
| SnapAreaData snap_y_only( |
| ScrollSnapAlign(SnapAlignment::kStart, SnapAlignment::kNone), |
| gfx::RectF(0, 70, 150, 150), false, ElementId(20)); |
| container.AddSnapAreaData(snap_x_only); |
| container.AddSnapAreaData(snap_y_only); |
| |
| gfx::ScrollOffset snap_position; |
| std::unique_ptr<SnapSelectionStrategy> strategy = |
| SnapSelectionStrategy::CreateForEndPosition(gfx::ScrollOffset(100, 100), |
| true, false); |
| EXPECT_TRUE( |
| container.FindSnapPosition(*strategy, &snap_position, &target_elements)); |
| EXPECT_EQ(80, snap_position.x()); |
| EXPECT_EQ(100, snap_position.y()); |
| EXPECT_EQ(TargetSnapAreaElementIds(ElementId(10), ElementId()), |
| target_elements); |
| } |
| |
| TEST_F(ScrollSnapDataTest, DoesNotSnapOnNonVisibleAreas) { |
| SnapContainerData container( |
| ScrollSnapType(false, SnapAxis::kBoth, SnapStrictness::kMandatory), |
| gfx::RectF(0, 0, 200, 200), gfx::ScrollOffset(600, 800)); |
| SnapAreaData snap_x_only( |
| ScrollSnapAlign(SnapAlignment::kNone, SnapAlignment::kStart), |
| gfx::RectF(300, 400, 100, 100), false, ElementId(10)); |
| SnapAreaData snap_y_only( |
| ScrollSnapAlign(SnapAlignment::kStart, SnapAlignment::kNone), |
| gfx::RectF(400, 300, 100, 100), false, ElementId(20)); |
| |
| container.AddSnapAreaData(snap_x_only); |
| container.AddSnapAreaData(snap_y_only); |
| gfx::ScrollOffset snap_position; |
| std::unique_ptr<SnapSelectionStrategy> strategy = |
| SnapSelectionStrategy::CreateForEndPosition(gfx::ScrollOffset(0, 0), true, |
| true); |
| EXPECT_FALSE( |
| container.FindSnapPosition(*strategy, &snap_position, &target_elements)); |
| EXPECT_EQ(TargetSnapAreaElementIds(), target_elements); |
| } |
| |
| TEST_F(ScrollSnapDataTest, SnapOnClosestAxisFirstIfVisibilityConflicts) { |
| SnapContainerData container( |
| ScrollSnapType(false, SnapAxis::kBoth, SnapStrictness::kMandatory), |
| gfx::RectF(0, 0, 200, 200), gfx::ScrollOffset(600, 800)); |
| |
| // Both the areas are currently visible. |
| // However, if we snap to them on x and y independently, none is visible after |
| // snapping. So we only snap on the axis that has a closer snap point first. |
| // After that, we look for another snap point on y axis which does not |
| // conflict with the snap point on x. |
| SnapAreaData snap_x( |
| ScrollSnapAlign(SnapAlignment::kNone, SnapAlignment::kStart), |
| gfx::RectF(150, 0, 100, 100), false, ElementId(10)); |
| SnapAreaData snap_y1( |
| ScrollSnapAlign(SnapAlignment::kStart, SnapAlignment::kNone), |
| gfx::RectF(0, 180, 100, 100), false, ElementId(20)); |
| SnapAreaData snap_y2( |
| ScrollSnapAlign(SnapAlignment::kStart, SnapAlignment::kNone), |
| gfx::RectF(250, 80, 100, 100), false, ElementId(30)); |
| container.AddSnapAreaData(snap_x); |
| container.AddSnapAreaData(snap_y1); |
| container.AddSnapAreaData(snap_y2); |
| |
| gfx::ScrollOffset snap_position; |
| std::unique_ptr<SnapSelectionStrategy> strategy = |
| SnapSelectionStrategy::CreateForEndPosition(gfx::ScrollOffset(0, 0), true, |
| true); |
| EXPECT_TRUE( |
| container.FindSnapPosition(*strategy, &snap_position, &target_elements)); |
| EXPECT_EQ(150, snap_position.x()); |
| EXPECT_EQ(80, snap_position.y()); |
| EXPECT_EQ(TargetSnapAreaElementIds(ElementId(10), ElementId(30)), |
| target_elements); |
| } |
| |
| TEST_F(ScrollSnapDataTest, DoesNotSnapToPositionsOutsideProximityRange) { |
| SnapContainerData container( |
| ScrollSnapType(false, SnapAxis::kBoth, SnapStrictness::kMandatory), |
| gfx::RectF(0, 0, 200, 200), gfx::ScrollOffset(600, 800)); |
| container.set_proximity_range(gfx::ScrollOffset(50, 50)); |
| |
| SnapAreaData area(ScrollSnapAlign(SnapAlignment::kStart), |
| gfx::RectF(80, 160, 100, 100), false, ElementId(10)); |
| container.AddSnapAreaData(area); |
| |
| gfx::ScrollOffset snap_position; |
| std::unique_ptr<SnapSelectionStrategy> strategy = |
| SnapSelectionStrategy::CreateForEndPosition(gfx::ScrollOffset(100, 100), |
| true, true); |
| EXPECT_TRUE( |
| container.FindSnapPosition(*strategy, &snap_position, &target_elements)); |
| |
| // The snap position on x, 80, is within the proximity range of [50, 150]. |
| // However, the snap position on y, 160, is outside the proximity range of |
| // [50, 150], so we should only snap on x. |
| EXPECT_EQ(80, snap_position.x()); |
| EXPECT_EQ(100, snap_position.y()); |
| EXPECT_EQ(TargetSnapAreaElementIds(ElementId(10), ElementId()), |
| target_elements); |
| } |
| |
| TEST_F(ScrollSnapDataTest, MandatoryReturnsToCurrentIfNoValidAreaForward) { |
| SnapContainerData container( |
| ScrollSnapType(false, SnapAxis::kBoth, SnapStrictness::kMandatory), |
| gfx::RectF(0, 0, 200, 200), gfx::ScrollOffset(2000, 2000)); |
| SnapAreaData area(ScrollSnapAlign(SnapAlignment::kStart), |
| gfx::RectF(600, 0, 100, 100), false, ElementId(10)); |
| container.AddSnapAreaData(area); |
| gfx::ScrollOffset snap_position; |
| |
| std::unique_ptr<SnapSelectionStrategy> direction_strategy = |
| SnapSelectionStrategy::CreateForDirection( |
| gfx::ScrollOffset(600, 0), gfx::ScrollOffset(5, 0), |
| false /* use_fractional_deltas */); |
| EXPECT_TRUE(container.FindSnapPosition(*direction_strategy, &snap_position, |
| &target_elements)); |
| // The snap direction is right. However, there is no valid snap position on |
| // that direction. So we have to stay at the current snap position of 600 as |
| // the snap type is mandatory. |
| EXPECT_EQ(600, snap_position.x()); |
| EXPECT_EQ(0, snap_position.y()); |
| EXPECT_EQ(TargetSnapAreaElementIds(ElementId(10), ElementId()), |
| target_elements); |
| |
| std::unique_ptr<SnapSelectionStrategy> end_direction_strategy = |
| SnapSelectionStrategy::CreateForEndAndDirection( |
| gfx::ScrollOffset(600, 0), gfx::ScrollOffset(15, 15), |
| false /* use_fractional_deltas */); |
| EXPECT_TRUE(container.FindSnapPosition(*end_direction_strategy, |
| &snap_position, &target_elements)); |
| // The snap direction is down and right. However, there is no valid snap |
| // position on that direction. So we have to stay at the current snap position |
| // of (600, 0) as the snap type is mandatory. |
| EXPECT_EQ(600, snap_position.x()); |
| EXPECT_EQ(0, snap_position.y()); |
| EXPECT_EQ(TargetSnapAreaElementIds(ElementId(10), ElementId(10)), |
| target_elements); |
| |
| // If the scroll-snap-type is proximity, we wouldn't consider the current |
| // snap area valid even if there is no snap area forward. |
| container.set_scroll_snap_type( |
| ScrollSnapType(false, SnapAxis::kBoth, SnapStrictness::kProximity)); |
| EXPECT_FALSE(container.FindSnapPosition(*direction_strategy, &snap_position, |
| &target_elements)); |
| EXPECT_FALSE(container.FindSnapPosition(*end_direction_strategy, |
| &snap_position, &target_elements)); |
| EXPECT_EQ(TargetSnapAreaElementIds(), target_elements); |
| } |
| |
| TEST_F(ScrollSnapDataTest, MandatorySnapsBackwardIfNoValidAreaForward) { |
| SnapContainerData container( |
| ScrollSnapType(false, SnapAxis::kBoth, SnapStrictness::kMandatory), |
| gfx::RectF(0, 0, 200, 200), gfx::ScrollOffset(2000, 2000)); |
| SnapAreaData area(ScrollSnapAlign(SnapAlignment::kStart), |
| gfx::RectF(600, 0, 100, 100), false, ElementId(10)); |
| container.AddSnapAreaData(area); |
| gfx::ScrollOffset snap_position; |
| |
| std::unique_ptr<SnapSelectionStrategy> direction_strategy = |
| SnapSelectionStrategy::CreateForDirection( |
| gfx::ScrollOffset(650, 0), gfx::ScrollOffset(5, 0), |
| false /* use_fractional_deltas */); |
| EXPECT_TRUE(container.FindSnapPosition(*direction_strategy, &snap_position, |
| &target_elements)); |
| // The snap direction is right. However, there is no valid snap position on |
| // that direction. So we have to scroll back to the snap position of 600 as |
| // the snap type is mandatory. |
| EXPECT_EQ(600, snap_position.x()); |
| EXPECT_EQ(0, snap_position.y()); |
| EXPECT_EQ(TargetSnapAreaElementIds(ElementId(10), ElementId()), |
| target_elements); |
| |
| std::unique_ptr<SnapSelectionStrategy> end_direction_strategy = |
| SnapSelectionStrategy::CreateForEndAndDirection( |
| gfx::ScrollOffset(650, 10), gfx::ScrollOffset(15, 15), |
| false /* use_fractional_deltas */); |
| EXPECT_TRUE(container.FindSnapPosition(*end_direction_strategy, |
| &snap_position, &target_elements)); |
| // The snap direction is down and right. However, there is no valid snap |
| // position on that direction. So we have to scroll back to the snap position |
| // of (600, 0) as the snap type is mandatory. |
| EXPECT_EQ(600, snap_position.x()); |
| EXPECT_EQ(0, snap_position.y()); |
| EXPECT_EQ(TargetSnapAreaElementIds(ElementId(10), ElementId(10)), |
| target_elements); |
| |
| // If the scroll-snap-type is proximity, we wouldn't consider the backward |
| // snap area valid even if there is no snap area forward. |
| container.set_scroll_snap_type( |
| ScrollSnapType(false, SnapAxis::kBoth, SnapStrictness::kProximity)); |
| EXPECT_FALSE(container.FindSnapPosition(*direction_strategy, &snap_position, |
| &target_elements)); |
| EXPECT_FALSE(container.FindSnapPosition(*end_direction_strategy, |
| &snap_position, &target_elements)); |
| EXPECT_EQ(TargetSnapAreaElementIds(), target_elements); |
| } |
| |
| TEST_F(ScrollSnapDataTest, ShouldNotPassScrollSnapStopAlwaysElement) { |
| SnapContainerData container( |
| ScrollSnapType(false, SnapAxis::kBoth, SnapStrictness::kMandatory), |
| gfx::RectF(0, 0, 200, 200), gfx::ScrollOffset(2000, 2000)); |
| SnapAreaData must_snap_1(ScrollSnapAlign(SnapAlignment::kStart), |
| gfx::RectF(200, 0, 100, 100), true, ElementId(10)); |
| SnapAreaData must_snap_2(ScrollSnapAlign(SnapAlignment::kStart), |
| gfx::RectF(400, 0, 100, 100), true, ElementId(20)); |
| SnapAreaData closer_to_target(ScrollSnapAlign(SnapAlignment::kStart), |
| gfx::RectF(600, 0, 100, 100), false, |
| ElementId(30)); |
| container.AddSnapAreaData(must_snap_1); |
| container.AddSnapAreaData(must_snap_2); |
| container.AddSnapAreaData(closer_to_target); |
| gfx::ScrollOffset snap_position; |
| |
| std::unique_ptr<SnapSelectionStrategy> end_direction_strategy = |
| SnapSelectionStrategy::CreateForEndAndDirection( |
| gfx::ScrollOffset(0, 0), gfx::ScrollOffset(600, 0), |
| false /* use_fractional_deltas */); |
| |
| EXPECT_TRUE(container.FindSnapPosition(*end_direction_strategy, |
| &snap_position, &target_elements)); |
| |
| // Even though closer_to_target and must_snap_2 are closer to the target |
| // position of the scroll, the must_snap_1 which is closer to the start |
| // shouldn't be passed. |
| EXPECT_EQ(200, snap_position.x()); |
| EXPECT_EQ(0, snap_position.y()); |
| EXPECT_EQ(TargetSnapAreaElementIds(ElementId(10), ElementId()), |
| target_elements); |
| } |
| |
| TEST_F(ScrollSnapDataTest, SnapStopAlwaysOverridesCoveringSnapArea) { |
| SnapContainerData container( |
| ScrollSnapType(false, SnapAxis::kBoth, SnapStrictness::kMandatory), |
| gfx::RectF(0, 0, 200, 200), gfx::ScrollOffset(600, 800)); |
| SnapAreaData stop_area(ScrollSnapAlign(SnapAlignment::kStart), |
| gfx::RectF(100, 0, 100, 100), true, ElementId(10)); |
| SnapAreaData covering_area(ScrollSnapAlign(SnapAlignment::kStart), |
| gfx::RectF(250, 0, 600, 600), false, |
| ElementId(20)); |
| container.AddSnapAreaData(stop_area); |
| container.AddSnapAreaData(covering_area); |
| |
| gfx::ScrollOffset snap_position; |
| std::unique_ptr<SnapSelectionStrategy> strategy = |
| SnapSelectionStrategy::CreateForEndAndDirection( |
| gfx::ScrollOffset(0, 0), gfx::ScrollOffset(300, 0), |
| false /* use_fractional_deltas */); |
| |
| // The fling is from (0, 0) to (300, 0), and the destination would make |
| // the |covering_area| perfectly cover the snapport. However, another area |
| // with snap-stop:always precedes this |covering_area| so we snap at |
| // (100, 100). |
| EXPECT_TRUE( |
| container.FindSnapPosition(*strategy, &snap_position, &target_elements)); |
| EXPECT_EQ(100, snap_position.x()); |
| EXPECT_EQ(0, snap_position.y()); |
| EXPECT_EQ(TargetSnapAreaElementIds(ElementId(10), ElementId()), |
| target_elements); |
| } |
| |
| TEST_F(ScrollSnapDataTest, SnapStopAlwaysInReverseDirection) { |
| SnapContainerData container( |
| ScrollSnapType(false, SnapAxis::kBoth, SnapStrictness::kMandatory), |
| gfx::RectF(0, 0, 200, 300), gfx::ScrollOffset(600, 800)); |
| SnapAreaData stop_area(ScrollSnapAlign(SnapAlignment::kStart), |
| gfx::RectF(100, 0, 100, 100), true, ElementId(10)); |
| container.AddSnapAreaData(stop_area); |
| |
| gfx::ScrollOffset snap_position; |
| std::unique_ptr<SnapSelectionStrategy> strategy = |
| SnapSelectionStrategy::CreateForEndAndDirection( |
| gfx::ScrollOffset(150, 0), gfx::ScrollOffset(200, 0), |
| false /* use_fractional_deltas */); |
| |
| // The fling is from (150, 0) to (350, 0), but the snap position is in the |
| // reverse direction at (100, 0). Since the container has mandatory for |
| // snapstrictness, we should go back to snap at (100, 0). |
| EXPECT_TRUE( |
| container.FindSnapPosition(*strategy, &snap_position, &target_elements)); |
| EXPECT_EQ(100, snap_position.x()); |
| EXPECT_EQ(0, snap_position.y()); |
| EXPECT_EQ(TargetSnapAreaElementIds(ElementId(10), ElementId()), |
| target_elements); |
| } |
| |
| TEST_F(ScrollSnapDataTest, SnapStopAlwaysNotInterferingWithDirectionStrategy) { |
| SnapContainerData container( |
| ScrollSnapType(false, SnapAxis::kBoth, SnapStrictness::kMandatory), |
| gfx::RectF(0, 0, 200, 300), gfx::ScrollOffset(600, 800)); |
| SnapAreaData closer_area(ScrollSnapAlign(SnapAlignment::kStart), |
| gfx::RectF(100, 0, 1, 1), false, ElementId(10)); |
| SnapAreaData stop_area(ScrollSnapAlign(SnapAlignment::kStart), |
| gfx::RectF(120, 0, 1, 1), true, ElementId(20)); |
| container.AddSnapAreaData(closer_area); |
| container.AddSnapAreaData(stop_area); |
| |
| // The DirectionStrategy should always choose the first snap position |
| // regardless its scroll-snap-stop value. |
| gfx::ScrollOffset snap_position; |
| std::unique_ptr<SnapSelectionStrategy> direction_strategy = |
| SnapSelectionStrategy::CreateForDirection( |
| gfx::ScrollOffset(90, 0), gfx::ScrollOffset(50, 0), |
| false /* use_fractional_deltas */); |
| snap_position = gfx::ScrollOffset(); |
| EXPECT_TRUE(container.FindSnapPosition(*direction_strategy, &snap_position, |
| &target_elements)); |
| EXPECT_EQ(100, snap_position.x()); |
| EXPECT_EQ(0, snap_position.y()); |
| EXPECT_EQ(TargetSnapAreaElementIds(ElementId(10), ElementId()), |
| target_elements); |
| } |
| |
| TEST_F(ScrollSnapDataTest, SnapToOneTargetElementOnX) { |
| SnapContainerData container( |
| ScrollSnapType(false, SnapAxis::kBoth, SnapStrictness::kMandatory), |
| gfx::RectF(0, 0, 200, 300), gfx::ScrollOffset(600, 800)); |
| |
| SnapAreaData closer_area_x(ScrollSnapAlign(SnapAlignment::kStart), |
| gfx::RectF(100, 0, 1, 1), false, ElementId(10)); |
| SnapAreaData target_area_x(ScrollSnapAlign(SnapAlignment::kStart), |
| gfx::RectF(200, 100, 1, 1), false, ElementId(20)); |
| SnapAreaData closer_area_y(ScrollSnapAlign(SnapAlignment::kStart), |
| gfx::RectF(300, 50, 1, 1), false, ElementId(30)); |
| |
| container.AddSnapAreaData(closer_area_x); |
| container.AddSnapAreaData(target_area_x); |
| container.AddSnapAreaData(closer_area_y); |
| container.SetTargetSnapAreaElementIds( |
| TargetSnapAreaElementIds(ElementId(20), ElementId())); |
| |
| // Even though closer_area_x is closer to the scroll offset, the container |
| // should snap to the target for the x-axis. However, since the target is not |
| // set for the y-axis, the target on the y-axis should be closer_area_y. |
| std::unique_ptr<SnapSelectionStrategy> target_element_strategy = |
| SnapSelectionStrategy::CreateForTargetElement(gfx::ScrollOffset(0, 0)); |
| |
| gfx::ScrollOffset snap_position = gfx::ScrollOffset(); |
| EXPECT_TRUE(container.FindSnapPosition(*target_element_strategy, |
| &snap_position, &target_elements)); |
| |
| EXPECT_EQ(200, snap_position.x()); |
| EXPECT_EQ(50, snap_position.y()); |
| EXPECT_EQ(TargetSnapAreaElementIds(ElementId(20), ElementId(30)), |
| target_elements); |
| } |
| |
| TEST_F(ScrollSnapDataTest, SnapToOneTargetElementOnY) { |
| SnapContainerData container( |
| ScrollSnapType(false, SnapAxis::kBoth, SnapStrictness::kMandatory), |
| gfx::RectF(0, 0, 200, 300), gfx::ScrollOffset(600, 800)); |
| |
| SnapAreaData closer_area_y(ScrollSnapAlign(SnapAlignment::kStart), |
| gfx::RectF(0, 100, 1, 1), false, ElementId(10)); |
| SnapAreaData target_area_y(ScrollSnapAlign(SnapAlignment::kStart), |
| gfx::RectF(100, 200, 1, 1), false, ElementId(20)); |
| SnapAreaData closer_area_x(ScrollSnapAlign(SnapAlignment::kStart), |
| gfx::RectF(50, 300, 1, 1), false, ElementId(30)); |
| |
| container.AddSnapAreaData(closer_area_y); |
| container.AddSnapAreaData(target_area_y); |
| container.AddSnapAreaData(closer_area_x); |
| container.SetTargetSnapAreaElementIds( |
| TargetSnapAreaElementIds(ElementId(), ElementId(20))); |
| |
| // Even though closer_area_y is closer to the scroll offset, the container |
| // should snap to the target for the y-axis. However, since the target is not |
| // set for the x-axis, the target on the x-axis should be closer_area_x. |
| std::unique_ptr<SnapSelectionStrategy> target_element_strategy = |
| SnapSelectionStrategy::CreateForTargetElement(gfx::ScrollOffset(0, 0)); |
| |
| gfx::ScrollOffset snap_position = gfx::ScrollOffset(); |
| EXPECT_TRUE(container.FindSnapPosition(*target_element_strategy, |
| &snap_position, &target_elements)); |
| |
| EXPECT_EQ(50, snap_position.x()); |
| EXPECT_EQ(200, snap_position.y()); |
| EXPECT_EQ(TargetSnapAreaElementIds(ElementId(30), ElementId(20)), |
| target_elements); |
| } |
| |
| TEST_F(ScrollSnapDataTest, SnapToTwoTargetElementsMutualVisible) { |
| SnapContainerData container( |
| ScrollSnapType(false, SnapAxis::kBoth, SnapStrictness::kMandatory), |
| gfx::RectF(0, 0, 300, 300), gfx::ScrollOffset(600, 800)); |
| |
| SnapAreaData target_area_x(ScrollSnapAlign(SnapAlignment::kStart), |
| gfx::RectF(100, 200, 1, 1), false, ElementId(10)); |
| SnapAreaData target_area_y(ScrollSnapAlign(SnapAlignment::kStart), |
| gfx::RectF(200, 100, 1, 1), false, ElementId(20)); |
| SnapAreaData closer_area_both(ScrollSnapAlign(SnapAlignment::kStart), |
| gfx::RectF(0, 0, 1, 1), false, ElementId(30)); |
| |
| container.AddSnapAreaData(target_area_x); |
| container.AddSnapAreaData(target_area_y); |
| container.AddSnapAreaData(closer_area_both); |
| container.SetTargetSnapAreaElementIds( |
| TargetSnapAreaElementIds(ElementId(10), ElementId(20))); |
| |
| // The container should snap to both target areas since they are mutually |
| // visible, while ignoring the snap area that is closest to the scroll offset. |
| std::unique_ptr<SnapSelectionStrategy> target_element_strategy = |
| SnapSelectionStrategy::CreateForTargetElement(gfx::ScrollOffset(0, 0)); |
| |
| gfx::ScrollOffset snap_position = gfx::ScrollOffset(); |
| EXPECT_TRUE(container.FindSnapPosition(*target_element_strategy, |
| &snap_position, &target_elements)); |
| |
| EXPECT_EQ(100, snap_position.x()); |
| EXPECT_EQ(100, snap_position.y()); |
| EXPECT_EQ(TargetSnapAreaElementIds(ElementId(10), ElementId(20)), |
| target_elements); |
| } |
| |
| TEST_F(ScrollSnapDataTest, SnapToTwoTargetElementsNotMutualVisible) { |
| SnapContainerData container( |
| ScrollSnapType(false, SnapAxis::kBoth, SnapStrictness::kMandatory), |
| gfx::RectF(0, 0, 300, 300), gfx::ScrollOffset(600, 800)); |
| |
| SnapAreaData target_area_x(ScrollSnapAlign(SnapAlignment::kStart), |
| gfx::RectF(100, 500, 1, 1), false, ElementId(10)); |
| SnapAreaData target_area_y(ScrollSnapAlign(SnapAlignment::kStart), |
| gfx::RectF(500, 100, 1, 1), false, ElementId(20)); |
| SnapAreaData area_mutually_visible_to_targets( |
| ScrollSnapAlign(SnapAlignment::kStart), gfx::RectF(350, 350, 1, 1), false, |
| ElementId(30)); |
| |
| container.AddSnapAreaData(target_area_x); |
| container.AddSnapAreaData(target_area_y); |
| container.AddSnapAreaData(area_mutually_visible_to_targets); |
| container.SetTargetSnapAreaElementIds( |
| TargetSnapAreaElementIds(ElementId(10), ElementId(20))); |
| |
| // The container cannot snap to both targets, so it should snap to the one |
| // closer to the scroll offset, and then snap to the closest mutually visible |
| // snap area on the other axis. |
| std::unique_ptr<SnapSelectionStrategy> target_element_strategy = |
| SnapSelectionStrategy::CreateForTargetElement(gfx::ScrollOffset(10, 0)); |
| |
| gfx::ScrollOffset snap_position = gfx::ScrollOffset(); |
| EXPECT_TRUE(container.FindSnapPosition(*target_element_strategy, |
| &snap_position, &target_elements)); |
| |
| EXPECT_EQ(100, snap_position.x()); |
| EXPECT_EQ(350, snap_position.y()); |
| EXPECT_EQ(TargetSnapAreaElementIds(ElementId(10), ElementId(30)), |
| target_elements); |
| } |
| |
| } // namespace cc |
