| // Copyright 2014 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 "third_party/blink/renderer/core/paint/box_painter.h" |
| |
| #include "base/optional.h" |
| #include "third_party/blink/renderer/core/layout/background_bleed_avoidance.h" |
| #include "third_party/blink/renderer/core/layout/layout_box.h" |
| #include "third_party/blink/renderer/core/layout/layout_object.h" |
| #include "third_party/blink/renderer/core/layout/layout_table.h" |
| #include "third_party/blink/renderer/core/layout/layout_theme.h" |
| #include "third_party/blink/renderer/core/layout/svg/layout_svg_foreign_object.h" |
| #include "third_party/blink/renderer/core/paint/background_image_geometry.h" |
| #include "third_party/blink/renderer/core/paint/box_decoration_data.h" |
| #include "third_party/blink/renderer/core/paint/box_model_object_painter.h" |
| #include "third_party/blink/renderer/core/paint/box_painter_base.h" |
| #include "third_party/blink/renderer/core/paint/compositing/composited_layer_mapping.h" |
| #include "third_party/blink/renderer/core/paint/nine_piece_image_painter.h" |
| #include "third_party/blink/renderer/core/paint/object_painter.h" |
| #include "third_party/blink/renderer/core/paint/paint_info.h" |
| #include "third_party/blink/renderer/core/paint/paint_layer_scrollable_area.h" |
| #include "third_party/blink/renderer/core/paint/scoped_paint_state.h" |
| #include "third_party/blink/renderer/core/paint/svg_foreign_object_painter.h" |
| #include "third_party/blink/renderer/core/paint/theme_painter.h" |
| #include "third_party/blink/renderer/platform/geometry/layout_point.h" |
| #include "third_party/blink/renderer/platform/geometry/length_functions.h" |
| #include "third_party/blink/renderer/platform/graphics/graphics_context_state_saver.h" |
| #include "third_party/blink/renderer/platform/graphics/paint/display_item_cache_skipper.h" |
| #include "third_party/blink/renderer/platform/graphics/paint/drawing_recorder.h" |
| #include "third_party/blink/renderer/platform/graphics/paint/hit_test_display_item.h" |
| #include "third_party/blink/renderer/platform/graphics/paint/scoped_paint_chunk_properties.h" |
| |
| namespace blink { |
| |
| void BoxPainter::Paint(const PaintInfo& paint_info) { |
| // Default implementation. Just pass paint through to the children. |
| ScopedPaintState paint_state(layout_box_, paint_info); |
| PaintChildren(paint_state.GetPaintInfo()); |
| } |
| |
| void BoxPainter::PaintChildren(const PaintInfo& paint_info) { |
| PaintInfo child_info(paint_info); |
| for (LayoutObject* child = layout_box_.SlowFirstChild(); child; |
| child = child->NextSibling()) { |
| if (child->IsSVGForeignObject()) { |
| SVGForeignObjectPainter(ToLayoutSVGForeignObject(*child)) |
| .PaintLayer(paint_info); |
| } else { |
| child->Paint(child_info); |
| } |
| } |
| } |
| |
| void BoxPainter::PaintBoxDecorationBackground(const PaintInfo& paint_info, |
| const LayoutPoint& paint_offset) { |
| LayoutRect paint_rect; |
| const DisplayItemClient* background_client = nullptr; |
| base::Optional<ScopedBoxContentsPaintState> contents_paint_state; |
| if (BoxModelObjectPainter::IsPaintingScrollingBackground(&layout_box_, |
| paint_info)) { |
| // For the case where we are painting the background into the scrolling |
| // contents layer of a composited scroller we need to include the entire |
| // overflow rect. |
| paint_rect = layout_box_.PhysicalLayoutOverflowRect(); |
| contents_paint_state.emplace(paint_info, paint_offset, layout_box_); |
| paint_rect.MoveBy(contents_paint_state->PaintOffset()); |
| |
| // The background painting code assumes that the borders are part of the |
| // paint_rect so we expand the paint_rect by the border size when painting |
| // the background into the scrolling contents layer. |
| paint_rect.Expand(layout_box_.BorderBoxOutsets()); |
| |
| background_client = &layout_box_.GetScrollableArea() |
| ->GetScrollingBackgroundDisplayItemClient(); |
| } else { |
| paint_rect = layout_box_.BorderBoxRect(); |
| paint_rect.MoveBy(paint_offset); |
| background_client = &layout_box_; |
| } |
| |
| // Paint the background if we're visible and this block has a box decoration |
| // (background, border, appearance, or box shadow). |
| const ComputedStyle& style = layout_box_.StyleRef(); |
| if (style.Visibility() == EVisibility::kVisible && |
| layout_box_.HasBoxDecorationBackground()) { |
| PaintBoxDecorationBackgroundWithRect( |
| contents_paint_state ? contents_paint_state->GetPaintInfo() |
| : paint_info, |
| paint_rect, *background_client); |
| } |
| |
| if (RuntimeEnabledFeatures::PaintTouchActionRectsEnabled()) |
| RecordHitTestData(paint_info, paint_rect, *background_client); |
| } |
| |
| bool BoxPainter::BackgroundIsKnownToBeOpaque(const PaintInfo& paint_info) { |
| LayoutRect bounds = BoxModelObjectPainter::IsPaintingScrollingBackground( |
| &layout_box_, paint_info) |
| ? layout_box_.LayoutOverflowRect() |
| : layout_box_.SelfVisualOverflowRect(); |
| return layout_box_.BackgroundIsKnownToBeOpaqueInRect(bounds); |
| } |
| |
| void BoxPainter::PaintBoxDecorationBackgroundWithRect( |
| const PaintInfo& paint_info, |
| const LayoutRect& paint_rect, |
| const DisplayItemClient& background_client) { |
| bool painting_scrolling_background = |
| BoxModelObjectPainter::IsPaintingScrollingBackground(&layout_box_, |
| paint_info); |
| const ComputedStyle& style = layout_box_.StyleRef(); |
| |
| base::Optional<DisplayItemCacheSkipper> cache_skipper; |
| // Disable cache in under-invalidation checking mode for MediaSliderPart |
| // because we always paint using the latest data (buffered ranges, current |
| // time and duration) which may be different from the cached data, and for |
| // delayed-invalidation object because it may change before it's actually |
| // invalidated. Note that we still report harmless under-invalidation of |
| // non-delayed-invalidation animated background, which should be ignored. |
| if (RuntimeEnabledFeatures::PaintUnderInvalidationCheckingEnabled() && |
| (style.Appearance() == kMediaSliderPart || |
| layout_box_.ShouldDelayFullPaintInvalidation())) { |
| cache_skipper.emplace(paint_info.context); |
| } |
| |
| if (DrawingRecorder::UseCachedDrawingIfPossible( |
| paint_info.context, background_client, |
| DisplayItem::kBoxDecorationBackground)) |
| return; |
| |
| DrawingRecorder recorder(paint_info.context, background_client, |
| DisplayItem::kBoxDecorationBackground); |
| BoxDecorationData box_decoration_data(layout_box_); |
| GraphicsContextStateSaver state_saver(paint_info.context, false); |
| |
| if (RuntimeEnabledFeatures::CompositeAfterPaintEnabled() && |
| LayoutRect(EnclosingIntRect(paint_rect)) == paint_rect && |
| BackgroundIsKnownToBeOpaque(paint_info)) |
| recorder.SetKnownToBeOpaque(); |
| |
| const auto skip_background = layout_box_.BackgroundTransfersToView() || |
| (paint_info.SkipRootBackground() && |
| paint_info.PaintContainer() == &layout_box_); |
| |
| bool needs_end_layer = false; |
| if (!painting_scrolling_background) { |
| // FIXME: Should eventually give the theme control over whether the box |
| // shadow should paint, since controls could have custom shadows of their |
| // own. |
| BoxPainterBase::PaintNormalBoxShadow(paint_info, paint_rect, style, true, |
| true, skip_background); |
| |
| if (BleedAvoidanceIsClipping(box_decoration_data.bleed_avoidance)) { |
| state_saver.Save(); |
| FloatRoundedRect border = style.GetRoundedBorderFor(paint_rect); |
| paint_info.context.ClipRoundedRect(border); |
| |
| if (box_decoration_data.bleed_avoidance == kBackgroundBleedClipLayer) { |
| paint_info.context.BeginLayer(); |
| needs_end_layer = true; |
| } |
| } |
| } |
| |
| // If we have a native theme appearance, paint that before painting our |
| // background. The theme will tell us whether or not we should also paint the |
| // CSS background. |
| IntRect snapped_paint_rect(PixelSnappedIntRect(paint_rect)); |
| ThemePainter& theme_painter = LayoutTheme::GetTheme().Painter(); |
| bool theme_painted = |
| box_decoration_data.has_appearance && |
| !theme_painter.Paint(layout_box_, paint_info, snapped_paint_rect); |
| if (!theme_painted && !skip_background) { |
| PaintBackground(paint_info, paint_rect, |
| box_decoration_data.background_color, |
| box_decoration_data.bleed_avoidance); |
| |
| if (box_decoration_data.has_appearance) { |
| theme_painter.PaintDecorations(layout_box_.GetNode(), |
| layout_box_.GetDocument(), style, |
| paint_info, snapped_paint_rect); |
| } |
| } |
| |
| if (!painting_scrolling_background) { |
| BoxPainterBase::PaintInsetBoxShadowWithBorderRect(paint_info, paint_rect, |
| style); |
| |
| // The theme will tell us whether or not we should also paint the CSS |
| // border. |
| if (box_decoration_data.has_border_decoration && |
| (!box_decoration_data.has_appearance || |
| (!theme_painted && |
| LayoutTheme::GetTheme().Painter().PaintBorderOnly( |
| layout_box_.GetNode(), style, paint_info, snapped_paint_rect))) && |
| !(layout_box_.IsTable() && |
| ToLayoutTable(&layout_box_)->ShouldCollapseBorders())) { |
| BoxPainterBase::PaintBorder( |
| layout_box_, layout_box_.GetDocument(), layout_box_.GeneratingNode(), |
| paint_info, paint_rect, style, box_decoration_data.bleed_avoidance); |
| } |
| } |
| |
| if (needs_end_layer) |
| paint_info.context.EndLayer(); |
| } |
| |
| void BoxPainter::PaintBackground(const PaintInfo& paint_info, |
| const LayoutRect& paint_rect, |
| const Color& background_color, |
| BackgroundBleedAvoidance bleed_avoidance) { |
| if (layout_box_.BackgroundTransfersToView()) |
| return; |
| if (layout_box_.BackgroundIsKnownToBeObscured()) |
| return; |
| BackgroundImageGeometry geometry(layout_box_); |
| BoxModelObjectPainter box_model_painter(layout_box_); |
| box_model_painter.PaintFillLayers(paint_info, background_color, |
| layout_box_.StyleRef().BackgroundLayers(), |
| paint_rect, geometry, bleed_avoidance); |
| } |
| |
| void BoxPainter::PaintMask(const PaintInfo& paint_info, |
| const LayoutPoint& paint_offset) { |
| DCHECK_EQ(PaintPhase::kMask, paint_info.phase); |
| |
| if (!layout_box_.HasMask() || |
| layout_box_.StyleRef().Visibility() != EVisibility::kVisible) |
| return; |
| |
| if (DrawingRecorder::UseCachedDrawingIfPossible( |
| paint_info.context, layout_box_, paint_info.phase)) |
| return; |
| |
| DrawingRecorder recorder(paint_info.context, layout_box_, paint_info.phase); |
| LayoutRect paint_rect = LayoutRect(paint_offset, layout_box_.Size()); |
| PaintMaskImages(paint_info, paint_rect); |
| } |
| |
| void BoxPainter::PaintMaskImages(const PaintInfo& paint_info, |
| const LayoutRect& paint_rect) { |
| // For mask images legacy layout painting handles multi-line boxes by giving |
| // the full width of the element, not the current line box, thereby clipping |
| // the offending edges. |
| bool include_logical_left_edge = true; |
| bool include_logical_right_edge = true; |
| |
| BackgroundImageGeometry geometry(layout_box_); |
| BoxModelObjectPainter painter(layout_box_); |
| painter.PaintMaskImages(paint_info, paint_rect, layout_box_, geometry, |
| include_logical_left_edge, |
| include_logical_right_edge); |
| } |
| |
| void BoxPainter::RecordHitTestData(const PaintInfo& paint_info, |
| const LayoutRect& paint_rect, |
| const DisplayItemClient& background_client) { |
| // Hit test display items are only needed for compositing. This flag is used |
| // for for printing and drag images which do not need hit testing. |
| if (paint_info.GetGlobalPaintFlags() & kGlobalPaintFlattenCompositingLayers) |
| return; |
| |
| // If an object is not visible, it does not participate in hit testing. |
| if (layout_box_.StyleRef().Visibility() != EVisibility::kVisible) |
| return; |
| |
| auto touch_action = layout_box_.EffectiveWhitelistedTouchAction(); |
| if (touch_action == TouchAction::kTouchActionAuto) |
| return; |
| |
| HitTestDisplayItem::Record(paint_info.context, background_client, |
| HitTestRect(paint_rect, touch_action)); |
| } |
| |
| } // namespace blink |
