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// 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 "third_party/blink/renderer/core/paint/ng/ng_fieldset_painter.h"
#include "third_party/blink/renderer/core/layout/layout_box.h"
#include "third_party/blink/renderer/core/layout/ng/ng_physical_box_fragment.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/fieldset_paint_info.h"
#include "third_party/blink/renderer/core/paint/ng/ng_box_fragment_painter.h"
#include "third_party/blink/renderer/core/paint/ng/ng_paint_fragment.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/platform/geometry/layout_rect_outsets.h"
#include "third_party/blink/renderer/platform/graphics/graphics_context_state_saver.h"
#include "third_party/blink/renderer/platform/graphics/paint/drawing_recorder.h"
namespace blink {
void NGFieldsetPainter::PaintBoxDecorationBackground(
const PaintInfo& paint_info,
const PhysicalOffset& paint_offset) {
const NGLink* legend = nullptr;
if (!fieldset_.Children().empty()) {
const auto& first_child = fieldset_.Children().front();
if (first_child->IsRenderedLegend())
legend = &first_child;
}
// Paint the fieldset (background, other decorations, and) border, with the
// cutout hole for the legend.
PaintFieldsetDecorationBackground(legend, paint_info, paint_offset);
}
void NGFieldsetPainter::PaintFieldsetDecorationBackground(
const NGLink* legend,
const PaintInfo& paint_info,
const PhysicalOffset& paint_offset) {
PhysicalSize fieldset_size(fieldset_.Size());
PhysicalRect paint_rect(paint_offset, fieldset_size);
const auto& fragment = fieldset_;
BoxDecorationData box_decoration_data(paint_info, fragment);
if (!box_decoration_data.ShouldPaint())
return;
if (DrawingRecorder::UseCachedDrawingIfPossible(
paint_info.context, *fieldset_.GetLayoutObject(), paint_info.phase))
return;
LayoutRectOutsets fieldset_borders = fragment.Borders().ToLayoutRectOutsets();
const ComputedStyle& style = fieldset_.Style();
PhysicalRect legend_border_box;
if (legend) {
legend_border_box.offset = legend->Offset();
legend_border_box.size = (*legend)->Size();
}
FieldsetPaintInfo fieldset_paint_info(style, fieldset_size, fieldset_borders,
legend_border_box);
PhysicalRect contracted_rect(paint_rect);
contracted_rect.Contract(fieldset_paint_info.border_outsets);
DrawingRecorder recorder(paint_info.context, *fieldset_.GetLayoutObject(),
paint_info.phase);
NGBoxFragmentPainter fragment_painter(fieldset_);
if (box_decoration_data.ShouldPaintShadow()) {
fragment_painter.PaintNormalBoxShadow(paint_info, contracted_rect, style);
}
if (box_decoration_data.ShouldPaintBackground()) {
// TODO(eae): Switch to LayoutNG version of BackgroundImageGeometry.
BackgroundImageGeometry geometry(
*static_cast<const LayoutBoxModelObject*>(fieldset_.GetLayoutObject()));
fragment_painter.PaintFillLayers(
paint_info, box_decoration_data.BackgroundColor(),
style.BackgroundLayers(), contracted_rect, geometry);
}
if (box_decoration_data.ShouldPaintShadow()) {
fragment_painter.PaintInsetBoxShadowWithBorderRect(
paint_info, contracted_rect, fieldset_.Style());
}
if (box_decoration_data.ShouldPaintBorder()) {
// Create a clipping region around the legend and paint the border as
// normal.
GraphicsContext& graphics_context = paint_info.context;
GraphicsContextStateSaver state_saver(graphics_context);
PhysicalRect legend_cutout_rect = fieldset_paint_info.legend_cutout_rect;
legend_cutout_rect.Move(paint_rect.offset);
graphics_context.ClipOut(PixelSnappedIntRect(legend_cutout_rect));
const LayoutObject* layout_object = fieldset_.GetLayoutObject();
Node* node = layout_object->GeneratingNode();
fragment_painter.PaintBorder(*fieldset_.GetLayoutObject(),
layout_object->GetDocument(), node, paint_info,
contracted_rect, fieldset_.Style());
}
}
} // namespace blink
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