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// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "cc/layers/painted_scrollbar_layer_impl.h"
#include <algorithm>
#include "base/memory/ptr_util.h"
#include "cc/input/scrollbar.h"
#include "cc/input/scrollbar_animation_controller.h"
#include "cc/layers/layer.h"
#include "cc/trees/layer_tree_impl.h"
#include "cc/trees/layer_tree_settings.h"
#include "cc/trees/occlusion.h"
#include "components/viz/common/quads/solid_color_draw_quad.h"
#include "components/viz/common/quads/texture_draw_quad.h"
#include "ui/gfx/geometry/rect_conversions.h"
namespace cc {
std::unique_ptr<PaintedScrollbarLayerImpl> PaintedScrollbarLayerImpl::Create(
LayerTreeImpl* tree_impl,
int id,
ScrollbarOrientation orientation,
bool is_left_side_vertical_scrollbar,
bool is_overlay) {
return base::WrapUnique(new PaintedScrollbarLayerImpl(
tree_impl, id, orientation, is_left_side_vertical_scrollbar, is_overlay));
}
PaintedScrollbarLayerImpl::PaintedScrollbarLayerImpl(
LayerTreeImpl* tree_impl,
int id,
ScrollbarOrientation orientation,
bool is_left_side_vertical_scrollbar,
bool is_overlay)
: ScrollbarLayerImplBase(tree_impl,
id,
orientation,
is_left_side_vertical_scrollbar,
is_overlay) {}
PaintedScrollbarLayerImpl::~PaintedScrollbarLayerImpl() = default;
mojom::LayerType PaintedScrollbarLayerImpl::GetLayerType() const {
return mojom::LayerType::kPaintedScrollbar;
}
std::unique_ptr<LayerImpl> PaintedScrollbarLayerImpl::CreateLayerImpl(
LayerTreeImpl* tree_impl) const {
return PaintedScrollbarLayerImpl::Create(tree_impl, id(), orientation(),
is_left_side_vertical_scrollbar(),
is_overlay_scrollbar());
}
void PaintedScrollbarLayerImpl::PushPropertiesTo(LayerImpl* layer) {
ScrollbarLayerImplBase::PushPropertiesTo(layer);
PaintedScrollbarLayerImpl* scrollbar_layer =
static_cast<PaintedScrollbarLayerImpl*>(layer);
scrollbar_layer->set_internal_contents_scale_and_bounds(
internal_contents_scale_, internal_content_bounds_);
scrollbar_layer->SetJumpOnTrackClick(jump_on_track_click_);
scrollbar_layer->SetSupportsDragSnapBack(supports_drag_snap_back_);
scrollbar_layer->SetThumbThickness(thumb_thickness_);
scrollbar_layer->SetThumbLength(thumb_length_);
scrollbar_layer->SetBackButtonRect(back_button_rect_);
scrollbar_layer->SetForwardButtonRect(forward_button_rect_);
scrollbar_layer->SetTrackRect(track_rect_);
scrollbar_layer->set_track_and_buttons_ui_resource_id(
track_and_buttons_ui_resource_id_);
scrollbar_layer->set_thumb_ui_resource_id(thumb_ui_resource_id_);
scrollbar_layer->set_uses_nine_patch_track_and_buttons(
uses_nine_patch_track_and_buttons_);
scrollbar_layer->SetScrollbarPaintedOpacity(painted_opacity_);
if (thumb_color_.has_value()) {
scrollbar_layer->SetThumbColor(thumb_color_.value());
}
scrollbar_layer->SetTrackAndButtonsImageBounds(
track_and_buttons_image_bounds_);
scrollbar_layer->SetTrackAndButtonsAperture(track_and_buttons_aperture_);
}
float PaintedScrollbarLayerImpl::OverlayScrollbarOpacity() const {
return IsFluentOverlayScrollbarEnabled() ? Opacity() : painted_opacity_;
}
bool PaintedScrollbarLayerImpl::WillDraw(
DrawMode draw_mode,
viz::ClientResourceProvider* resource_provider) {
DCHECK(draw_mode != DRAW_MODE_RESOURCELESS_SOFTWARE);
return LayerImpl::WillDraw(draw_mode, resource_provider);
}
void PaintedScrollbarLayerImpl::AppendQuads(
const AppendQuadsContext& context,
viz::CompositorRenderPass* render_pass,
AppendQuadsData* append_quads_data) {
AppendThumbQuads(render_pass, append_quads_data);
AppendTrackAndButtonsQuads(render_pass, append_quads_data);
}
void PaintedScrollbarLayerImpl::AppendThumbQuads(
viz::CompositorRenderPass* render_pass,
AppendQuadsData* append_quads_data) const {
viz::SharedQuadState* shared_quad_state =
render_pass->CreateAndAppendSharedQuadState();
// The thumb sqs must be non-opaque so that the track and buttons will not be
// occluded in viz by the thumb's 'quad_layer_rect'.
constexpr bool kContentsOpaque = false;
PopulateScaledSharedQuadState(shared_quad_state, internal_contents_scale_,
kContentsOpaque);
AppendDebugBorderQuad(render_pass, gfx::Rect(internal_content_bounds_),
shared_quad_state, append_quads_data);
const gfx::Rect thumb_quad_rect = ComputeThumbQuadRect();
const gfx::Rect scaled_thumb_quad_rect =
gfx::ScaleToEnclosingRect(thumb_quad_rect, internal_contents_scale_);
const gfx::Rect visible_thumb_quad_rect =
draw_properties().occlusion_in_content_space.GetUnoccludedContentRect(
thumb_quad_rect);
if (visible_thumb_quad_rect.IsEmpty()) {
return;
}
const gfx::Rect scaled_visible_thumb_quad_rect = gfx::ScaleToEnclosingRect(
visible_thumb_quad_rect, internal_contents_scale_);
if (thumb_color_.has_value()) {
gfx::MaskFilterInfo rounded_corners_mask =
draw_properties().mask_filter_info;
// Web tests draw the thumb as a square to avoid issues that come with the
// differences in calculation of anti-aliasing and rounding in different
// platforms.
if (!is_web_test() && IsFluentScrollbarEnabled()) {
const int rounded_corner_radius =
orientation() == ScrollbarOrientation::kHorizontal
? thumb_quad_rect.height()
: thumb_quad_rect.width();
shared_quad_state->mask_filter_info = gfx::MaskFilterInfo(
gfx::RRectF(gfx::RectF(thumb_quad_rect), rounded_corner_radius));
shared_quad_state->mask_filter_info.ApplyTransform(
draw_properties().target_space_transform);
}
auto* thumb_quad =
render_pass->CreateAndAppendDrawQuad<viz::SolidColorDrawQuad>();
thumb_quad->SetNew(shared_quad_state, scaled_thumb_quad_rect,
scaled_visible_thumb_quad_rect, thumb_color_.value(),
/*anti_aliasing_off=*/false);
ValidateQuadResources(thumb_quad);
return;
}
// If Fluent scrollbars are enabled but there is no `thumb_color_`, that means
// that the scrollbar's bounds or thumb have no dimensions so we can exit
// early.
if (IsFluentScrollbarEnabled()) {
return;
}
viz::ResourceId thumb_resource_id =
layer_tree_impl()->ResourceIdForUIResource(thumb_ui_resource_id_);
if (!thumb_resource_id) {
return;
}
shared_quad_state->opacity *= painted_opacity_;
auto* quad = render_pass->CreateAndAppendDrawQuad<viz::TextureDrawQuad>();
quad->SetNew(shared_quad_state, scaled_thumb_quad_rect,
scaled_visible_thumb_quad_rect, /*needs_blending=*/true,
thumb_resource_id,
/*top_left=*/gfx::PointF(0.f, 0.f),
/*bottom_right=*/gfx::PointF(1.f, 1.f),
/*background=*/SkColors::kTransparent,
/*nearest=*/false, /*secure_output=*/false,
/*video_type=*/gfx::ProtectedVideoType::kClear);
ValidateQuadResources(quad);
}
void PaintedScrollbarLayerImpl::AppendTrackAndButtonsQuads(
viz::CompositorRenderPass* render_pass,
AppendQuadsData* append_quads_data) {
if (IsFluentOverlayScrollbarEnabled() &&
thumb_thickness_scale_factor() <= GetIdleThicknessScale() &&
!has_find_in_page_tickmarks()) {
return;
}
gfx::Rect track_and_buttons_quad_rect(bounds());
gfx::Rect visible_track_and_buttons_quad_rect =
draw_properties().occlusion_in_content_space.GetUnoccludedContentRect(
track_and_buttons_quad_rect);
viz::ResourceId track_and_buttons_resource_id =
layer_tree_impl()->ResourceIdForUIResource(
track_and_buttons_ui_resource_id_);
if (!track_and_buttons_resource_id || track_and_buttons_quad_rect.IsEmpty()) {
return;
}
viz::SharedQuadState* track_and_buttons_shared_quad_state =
render_pass->CreateAndAppendSharedQuadState();
PopulateScaledSharedQuadState(track_and_buttons_shared_quad_state,
internal_contents_scale_, contents_opaque());
if (IsFluentOverlayScrollbarEnabled()) {
// Scale the opacity value linearly in function of the current thumb
// thickness. When thickness scale factor is kIdleThickness, then the
// track's opacity should be zero. When the thickness scale factor
// reaches its maximum value (1.f), then the opacity of the tracks should
// reach it's maximum value (1.f).
CHECK_GE(thumb_thickness_scale_factor(), GetIdleThicknessScale());
CHECK_LE(thumb_thickness_scale_factor(), 1.f);
const float scaled_opacity =
(thumb_thickness_scale_factor() - GetIdleThicknessScale()) /
(1.f - GetIdleThicknessScale());
track_and_buttons_shared_quad_state->opacity *= scaled_opacity;
}
gfx::Rect scaled_track_and_buttons_quad_rect(internal_content_bounds_);
if (uses_nine_patch_track_and_buttons_ && !has_find_in_page_tickmarks()) {
AppendNinePatchScaledTrackAndButtons(render_pass,
track_and_buttons_shared_quad_state,
scaled_track_and_buttons_quad_rect);
return;
}
gfx::Rect scaled_visible_track_and_buttons_quad_rect =
gfx::ScaleToEnclosingRect(visible_track_and_buttons_quad_rect,
internal_contents_scale_);
bool needs_blending = !contents_opaque();
auto* quad = render_pass->CreateAndAppendDrawQuad<viz::TextureDrawQuad>();
quad->SetNew(track_and_buttons_shared_quad_state,
scaled_track_and_buttons_quad_rect,
scaled_visible_track_and_buttons_quad_rect, needs_blending,
track_and_buttons_resource_id,
/*top_left=*/gfx::PointF(0.f, 0.f),
/*bottom_right=*/gfx::PointF(1.f, 1.f),
/*background=*/SkColors::kTransparent,
/*nearest=*/false, /*secure_output=*/false,
/*video_type=*/gfx::ProtectedVideoType::kClear);
ValidateQuadResources(quad);
}
void PaintedScrollbarLayerImpl::AppendNinePatchScaledTrackAndButtons(
viz::CompositorRenderPass* render_pass,
viz::SharedQuadState* shared_quad_state,
const gfx::Rect& track_and_buttons_quad_rect) {
CHECK(uses_nine_patch_track_and_buttons_);
const gfx::Rect border(
track_and_buttons_aperture_.x(), track_and_buttons_aperture_.y(),
track_and_buttons_aperture_.x() * 2, track_and_buttons_aperture_.y() * 2);
const bool layout_changed = track_and_buttons_patch_generator_.SetLayout(
track_and_buttons_image_bounds_, track_and_buttons_quad_rect.size(),
track_and_buttons_aperture_, border, /*output_occlusion=*/gfx::Rect(),
/*fill_center=*/true, /*nearest_neighbor=*/false);
if (layout_changed) {
track_and_buttons_patch_generator_.CheckGeometryLimitations();
track_and_buttons_patches_ =
track_and_buttons_patch_generator_.GeneratePatches();
gfx::Vector2d offset = track_and_buttons_quad_rect.OffsetFromOrigin();
for (auto& patch : track_and_buttons_patches_) {
patch.output_rect += offset;
}
}
track_and_buttons_patch_generator_.AppendQuadsForCc(
this, track_and_buttons_ui_resource_id_, render_pass, shared_quad_state,
track_and_buttons_patches_);
}
gfx::Rect PaintedScrollbarLayerImpl::GetEnclosingVisibleRectInTargetSpace()
const {
if (internal_content_bounds_.IsEmpty())
return gfx::Rect();
DCHECK_GT(internal_contents_scale_, 0.f);
return GetScaledEnclosingVisibleRectInTargetSpace(internal_contents_scale_);
}
gfx::Rect PaintedScrollbarLayerImpl::ComputeThumbQuadRect() const {
gfx::Rect thumb_rect = ScrollbarLayerImplBase::ComputeThumbQuadRect();
if (thumb_color_.has_value()) {
thumb_rect = CenterSolidColorThumb(thumb_rect);
}
return thumb_rect;
}
gfx::Rect PaintedScrollbarLayerImpl::ComputeHitTestableThumbQuadRect() const {
if (thumb_color_.has_value()) {
return ExpandSolidColorThumb(ComputeThumbQuadRect());
}
return ScrollbarLayerImplBase::ComputeHitTestableThumbQuadRect();
}
gfx::Rect PaintedScrollbarLayerImpl::ComputeHitTestableExpandedThumbQuadRect()
const {
CHECK(is_overlay_scrollbar());
gfx::Rect thumb_rect =
ScrollbarLayerImplBase::ComputeHitTestableExpandedThumbQuadRect();
if (thumb_color_.has_value()) {
thumb_rect = ExpandSolidColorThumb(CenterSolidColorThumb(thumb_rect));
}
return thumb_rect;
}
gfx::Rect PaintedScrollbarLayerImpl::CenterSolidColorThumb(
gfx::Rect thumb_rect) const {
CHECK(thumb_color_.has_value());
const int track_thickness = orientation() == ScrollbarOrientation::kHorizontal
? track_rect_.height()
: track_rect_.width();
const int thumb_offset =
static_cast<int>((track_thickness - ThumbThickness()) / 2.0f);
if (orientation() == ScrollbarOrientation::kHorizontal) {
thumb_rect.Offset(0, thumb_offset);
} else {
thumb_rect.Offset(
is_left_side_vertical_scrollbar() ? -thumb_offset : thumb_offset, 0);
}
return thumb_rect;
}
gfx::Rect PaintedScrollbarLayerImpl::ExpandSolidColorThumb(
gfx::Rect thumb_rect) const {
CHECK(thumb_color_.has_value());
const gfx::Rect back_track_rect = BackTrackRect();
if (orientation() == ScrollbarOrientation::kHorizontal) {
thumb_rect.set_y(back_track_rect.y());
thumb_rect.set_height(back_track_rect.height());
return thumb_rect;
}
thumb_rect.set_x(back_track_rect.x());
thumb_rect.set_width(back_track_rect.width());
return thumb_rect;
}
void PaintedScrollbarLayerImpl::SetJumpOnTrackClick(bool jump_on_track_click) {
if (jump_on_track_click_ == jump_on_track_click)
return;
jump_on_track_click_ = jump_on_track_click;
NoteLayerPropertyChanged();
}
bool PaintedScrollbarLayerImpl::JumpOnTrackClick() const {
return jump_on_track_click_;
}
void PaintedScrollbarLayerImpl::SetSupportsDragSnapBack(
bool supports_drag_snap_back) {
if (supports_drag_snap_back_ == supports_drag_snap_back)
return;
supports_drag_snap_back_ = supports_drag_snap_back;
NoteLayerPropertyChanged();
}
void PaintedScrollbarLayerImpl::SetTrackAndButtonsImageBounds(
const gfx::Size& bounds) {
if (track_and_buttons_image_bounds_ == bounds) {
return;
}
track_and_buttons_image_bounds_ = bounds;
NoteLayerPropertyChanged();
}
void PaintedScrollbarLayerImpl::SetTrackAndButtonsAperture(
const gfx::Rect& aperture) {
if (track_and_buttons_aperture_ == aperture) {
return;
}
track_and_buttons_aperture_ = aperture;
NoteLayerPropertyChanged();
}
void PaintedScrollbarLayerImpl::SetThumbColor(SkColor4f thumb_color) {
if (thumb_color_ == thumb_color) {
return;
}
thumb_color_ = thumb_color;
NoteLayerPropertyChanged();
}
bool PaintedScrollbarLayerImpl::SupportsDragSnapBack() const {
return supports_drag_snap_back_;
}
void PaintedScrollbarLayerImpl::SetThumbThickness(int thumb_thickness) {
if (thumb_thickness_ == thumb_thickness)
return;
thumb_thickness_ = thumb_thickness;
NoteLayerPropertyChanged();
}
int PaintedScrollbarLayerImpl::ThumbThickness() const {
return thumb_thickness_;
}
void PaintedScrollbarLayerImpl::SetThumbLength(int thumb_length) {
if (thumb_length_ == thumb_length)
return;
thumb_length_ = thumb_length;
NoteLayerPropertyChanged();
}
int PaintedScrollbarLayerImpl::ThumbLength() const {
return thumb_length_;
}
int PaintedScrollbarLayerImpl::TrackStart() const {
return orientation() == ScrollbarOrientation::kVertical ? track_rect_.y()
: track_rect_.x();
}
void PaintedScrollbarLayerImpl::SetBackButtonRect(gfx::Rect back_button_rect) {
if (back_button_rect_ == back_button_rect)
return;
back_button_rect_ = back_button_rect;
NoteLayerPropertyChanged();
}
gfx::Rect PaintedScrollbarLayerImpl::BackButtonRect() const {
return back_button_rect_;
}
void PaintedScrollbarLayerImpl::SetForwardButtonRect(
gfx::Rect forward_button_rect) {
if (forward_button_rect_ == forward_button_rect)
return;
forward_button_rect_ = forward_button_rect;
NoteLayerPropertyChanged();
}
gfx::Rect PaintedScrollbarLayerImpl::ForwardButtonRect() const {
return forward_button_rect_;
}
gfx::Rect PaintedScrollbarLayerImpl::BackTrackRect() const {
const gfx::Rect thumb_rect = ComputeThumbQuadRect();
const int rect_x = track_rect_.x();
const int rect_y = track_rect_.y();
if (orientation() == ScrollbarOrientation::kHorizontal) {
int width = thumb_rect.x() - rect_x;
int height = track_rect_.height();
return gfx::Rect(rect_x, rect_y, width, height);
} else {
int width = track_rect_.width();
int height = thumb_rect.y() - rect_y;
return gfx::Rect(rect_x, rect_y, width, height);
}
}
gfx::Rect PaintedScrollbarLayerImpl::ForwardTrackRect() const {
const gfx::Rect thumb_rect = ComputeThumbQuadRect();
const int track_end = TrackStart() + TrackLength();
if (orientation() == ScrollbarOrientation::kHorizontal) {
int rect_x = thumb_rect.right();
int rect_y = track_rect_.y();
int width = track_end - rect_x;
int height = track_rect_.height();
return gfx::Rect(rect_x, rect_y, width, height);
} else {
int rect_x = track_rect_.x();
int rect_y = thumb_rect.bottom();
int width = track_rect_.width();
int height = track_end - rect_y;
return gfx::Rect(rect_x, rect_y, width, height);
}
}
void PaintedScrollbarLayerImpl::SetTrackRect(gfx::Rect track_rect) {
if (track_rect_ == track_rect)
return;
track_rect_ = track_rect;
NoteLayerPropertyChanged();
}
void PaintedScrollbarLayerImpl::SetScrollbarPaintedOpacity(float opacity) {
if (painted_opacity_ == opacity)
return;
painted_opacity_ = opacity;
NoteLayerPropertyChanged();
}
float PaintedScrollbarLayerImpl::TrackLength() const {
if (orientation() == ScrollbarOrientation::kVertical) {
return track_rect_.height() + vertical_adjust();
} else {
return track_rect_.width();
}
}
bool PaintedScrollbarLayerImpl::IsThumbResizable() const {
return false;
}
LayerTreeSettings::ScrollbarAnimator
PaintedScrollbarLayerImpl::GetScrollbarAnimator() const {
return IsFluentOverlayScrollbarEnabled() ? LayerTreeSettings::AURA_OVERLAY
: LayerTreeSettings::NO_ANIMATOR;
}
} // namespace cc
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