forked from mirrors/gecko-dev
81 lines
3.4 KiB
C++
81 lines
3.4 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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// vim:cindent:ts=4:et:sw=4:
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/*
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* Web-compatible algorithms that determine column and table isizes,
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* used for CSS2's 'table-layout: auto'.
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*/
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#ifndef BasicTableLayoutStrategy_h_
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#define BasicTableLayoutStrategy_h_
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#include "mozilla/Attributes.h"
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#include "nsITableLayoutStrategy.h"
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class nsTableFrame;
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class BasicTableLayoutStrategy : public nsITableLayoutStrategy
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{
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public:
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explicit BasicTableLayoutStrategy(nsTableFrame *aTableFrame);
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virtual ~BasicTableLayoutStrategy();
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// nsITableLayoutStrategy implementation
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virtual nscoord GetMinISize(gfxContext* aRenderingContext) override;
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virtual nscoord GetPrefISize(gfxContext* aRenderingContext,
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bool aComputingSize) override;
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virtual void MarkIntrinsicISizesDirty() override;
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virtual void ComputeColumnISizes(const ReflowInput& aReflowInput) override;
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private:
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// NOTE: Using prefix "BTLS" to avoid overlapping names with
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// the values of nsLayoutUtils::IntrinsicISizeType
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enum BtlsISizeType { BTLS_MIN_ISIZE,
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BTLS_PREF_ISIZE,
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BTLS_FINAL_ISIZE };
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// Compute intrinsic isize member variables on the columns.
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void ComputeColumnIntrinsicISizes(gfxContext* aRenderingContext);
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// Distribute a colspanning cell's percent isize (if any) to its columns.
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void DistributePctISizeToColumns(float aSpanPrefPct,
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int32_t aFirstCol,
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int32_t aColCount);
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// Distribute an isize of some BltsISizeType type to a set of columns.
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// aISize: The amount of isize to be distributed
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// aFirstCol: The index (in the table) of the first column to be
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// considered for receiving isize
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// aColCount: The number of consecutive columns (starting with aFirstCol)
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// to be considered for receiving isize
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// aISizeType: The type of isize being distributed. (BTLS_MIN_ISIZE and
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// BTLS_PREF_ISIZE are intended to be used for dividing up
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// colspan's min & pref isize. BTLS_FINAL_ISIZE is intended
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// to be used for distributing the table's final isize across
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// all its columns)
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// aSpanHasSpecifiedISize: Should be true iff:
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// - We're distributing a colspanning cell's
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// pref or min isize to its columns
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// - The colspanning cell has a specified isize.
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void DistributeISizeToColumns(nscoord aISize,
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int32_t aFirstCol,
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int32_t aColCount,
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BtlsISizeType aISizeType,
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bool aSpanHasSpecifiedISize);
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// Compute the min and pref isizes of the table from the isize
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// variables on the columns.
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void ComputeIntrinsicISizes(gfxContext* aRenderingContext);
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nsTableFrame *mTableFrame;
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nscoord mMinISize;
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nscoord mPrefISize;
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nscoord mPrefISizePctExpand;
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nscoord mLastCalcISize;
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};
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#endif /* !defined(BasicTableLayoutStrategy_h_) */
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