gecko-dev/layout/tables/nsITableLayoutStrategy.h

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
// vim:cindent:ts=4:et:sw=4:
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

/*
 * interface for the set of algorithms that determine column and table
 * isizes
 */

#ifndef nsITableLayoutStrategy_h_
#define nsITableLayoutStrategy_h_

#include "nscore.h"
#include "nsCoord.h"

class gfxContext;
namespace mozilla {
struct ReflowInput;
}  // namespace mozilla

class nsITableLayoutStrategy {
 public:
  using ReflowInput = mozilla::ReflowInput;

  virtual ~nsITableLayoutStrategy() {}

  /** Implement nsIFrame::GetMinISize for the table */
  virtual nscoord GetMinISize(gfxContext* aRenderingContext) = 0;

  /** Implement nsIFrame::GetPrefISize for the table */
  virtual nscoord GetPrefISize(gfxContext* aRenderingContext,
                               bool aComputingSize) = 0;

  /** Implement nsIFrame::MarkIntrinsicISizesDirty for the table */
  virtual void MarkIntrinsicISizesDirty() = 0;

  /**
   * Compute final column isizes based on the intrinsic isize data and
   * the available isize.
   */
  virtual void ComputeColumnISizes(const ReflowInput& aReflowInput) = 0;

  /**
   * Return the type of table layout strategy, without the cost of
   * a virtual function call
   */
  enum Type { Auto, Fixed };
  Type GetType() const { return mType; }

 protected:
  explicit nsITableLayoutStrategy(Type aType) : mType(aType) {}

 private:
  Type mType;
};

#endif /* !defined(nsITableLayoutStrategy_h_) */