third_party/WebKit/Source/core/paint/ObjectPainter.h

// 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.

#ifndef ObjectPainter_h
#define ObjectPainter_h

#include "core/style/ComputedStyleConstants.h"
#include "wtf/Allocator.h"
#include "wtf/Vector.h"

namespace blink {

class Color;
class GraphicsContext;
class LayoutPoint;
class LayoutRect;
class LayoutSize;
struct PaintInfo;
class LayoutObject;
class ComputedStyle;

class ObjectPainter {
  STACK_ALLOCATED();

 public:
  ObjectPainter(const LayoutObject& layoutObject)
      : m_layoutObject(layoutObject) {}

  void paintOutline(const PaintInfo&, const LayoutPoint& paintOffset);
  void paintInlineChildrenOutlines(const PaintInfo&,
                                   const LayoutPoint& paintOffset);
  void addPDFURLRectIfNeeded(const PaintInfo&, const LayoutPoint& paintOffset);

  static void drawLineForBoxSide(GraphicsContext&,
                                 int x1,
                                 int y1,
                                 int x2,
                                 int y2,
                                 BoxSide,
                                 Color,
                                 EBorderStyle,
                                 int adjbw1,
                                 int adjbw2,
                                 bool antialias = false);

  // Paints the object atomically as if it created a new stacking context, for:
  // - inline blocks, inline tables, inline-level replaced elements (Section
  //   7.2.1.4 in http://www.w3.org/TR/CSS2/zindex.html#painting-order),
  // - non-positioned floating objects (Section 5 in
  //   http://www.w3.org/TR/CSS2/zindex.html#painting-order),
  // - flex items (http://www.w3.org/TR/css-flexbox-1/#painting),
  // - grid items (http://www.w3.org/TR/css-grid-1/#z-order),
  // - custom scrollbar parts.
  // Also see core/paint/README.md.
  //
  // It is expected that the caller will call this function independent of the
  // value of paintInfo.phase, and this function will do atomic paint (for
  // PaintPhaseForeground), normal paint (for PaintPhaseSelection and
  // PaintPhaseTextClip) or nothing (other paint phases) according to
  // paintInfo.phase.
  void paintAllPhasesAtomically(const PaintInfo&,
                                const LayoutPoint& paintOffset);

 private:
  static void drawDashedOrDottedBoxSide(GraphicsContext&,
                                        int x1,
                                        int y1,
                                        int x2,
                                        int y2,
                                        BoxSide,
                                        Color,
                                        int thickness,
                                        EBorderStyle,
                                        bool antialias);
  static void drawDoubleBoxSide(GraphicsContext&,
                                int x1,
                                int y1,
                                int x2,
                                int y2,
                                int length,
                                BoxSide,
                                Color,
                                int thickness,
                                int adjacentWidth1,
                                int adjacentWidth2,
                                bool antialias);
  static void drawRidgeOrGrooveBoxSide(GraphicsContext&,
                                       int x1,
                                       int y1,
                                       int x2,
                                       int y2,
                                       BoxSide,
                                       Color,
                                       EBorderStyle,
                                       int adjacentWidth1,
                                       int adjacentWidth2,
                                       bool antialias);
  static void drawSolidBoxSide(GraphicsContext&,
                               int x1,
                               int y1,
                               int x2,
                               int y2,
                               BoxSide,
                               Color,
                               int adjacentWidth1,
                               int adjacentWidth2,
                               bool antialias);

  const LayoutObject& m_layoutObject;
};

}  // namespace blink

#endif