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/* -*- 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/. */
/*
* Web-compatible algorithms that determine column and table isizes,
* used for CSS2's 'table-layout: auto'.
*/
#ifndef BasicTableLayoutStrategy_h_
#define BasicTableLayoutStrategy_h_
#include "mozilla/Attributes.h"
#include "nsITableLayoutStrategy.h"
class nsTableFrame;
class BasicTableLayoutStrategy : public nsITableLayoutStrategy {
public:
explicit BasicTableLayoutStrategy(nsTableFrame* aTableFrame);
virtual ~BasicTableLayoutStrategy();
// nsITableLayoutStrategy implementation
virtual nscoord GetMinISize(gfxContext* aRenderingContext) override;
virtual nscoord GetPrefISize(gfxContext* aRenderingContext,
bool aComputingSize) override;
virtual void MarkIntrinsicISizesDirty() override;
virtual void ComputeColumnISizes(const ReflowInput& aReflowInput) override;
private:
// NOTE: Using prefix "BTLS" to avoid overlapping names with
// the values of mozilla::IntrinsicISizeType.
enum class BtlsISizeType : uint8_t { MinISize, PrefISize, FinalISize };
// Compute intrinsic isize member variables on the columns.
void ComputeColumnIntrinsicISizes(gfxContext* aRenderingContext);
// Distribute a colspanning cell's percent isize (if any) to its columns.
void DistributePctISizeToColumns(float aSpanPrefPct, int32_t aFirstCol,
int32_t aColCount);
// Distribute an isize of some BltsISizeType type to a set of columns.
// aISize: The amount of isize to be distributed
// aFirstCol: The index (in the table) of the first column to be
// considered for receiving isize
// aColCount: The number of consecutive columns (starting with aFirstCol)
// to be considered for receiving isize
// aISizeType: The type of isize being distributed. (BTLS_MIN_ISIZE and
// BTLS_PREF_ISIZE are intended to be used for dividing up
// colspan's min & pref isize. BTLS_FINAL_ISIZE is intended
// to be used for distributing the table's final isize across
// all its columns)
// aSpanHasSpecifiedISize: Should be true iff:
// - We're distributing a colspanning cell's
// pref or min isize to its columns
// - The colspanning cell has a specified isize.
void DistributeISizeToColumns(nscoord aISize, int32_t aFirstCol,
int32_t aColCount, BtlsISizeType aISizeType,
bool aSpanHasSpecifiedISize);
// Compute the min and pref isizes of the table from the isize
// variables on the columns.
void ComputeIntrinsicISizes(gfxContext* aRenderingContext);
nsTableFrame* mTableFrame;
nscoord mMinISize;
nscoord mPrefISize;
nscoord mPrefISizePctExpand;
nscoord mLastCalcISize;
};
#endif /* !defined(BasicTableLayoutStrategy_h_) */
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