1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/layout/tables/BasicTableLayoutStrategy.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,81 @@
1.4 +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
1.5 +// vim:cindent:ts=4:et:sw=4:
1.6 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +/*
1.11 + * Web-compatible algorithms that determine column and table widths,
1.12 + * used for CSS2's 'table-layout: auto'.
1.13 + */
1.14 +
1.15 +#ifndef BasicTableLayoutStrategy_h_
1.16 +#define BasicTableLayoutStrategy_h_
1.17 +
1.18 +#include "mozilla/Attributes.h"
1.19 +#include "nsITableLayoutStrategy.h"
1.20 +
1.21 +class nsTableFrame;
1.22 +
1.23 +class BasicTableLayoutStrategy : public nsITableLayoutStrategy
1.24 +{
1.25 +public:
1.26 + BasicTableLayoutStrategy(nsTableFrame *aTableFrame);
1.27 + virtual ~BasicTableLayoutStrategy();
1.28 +
1.29 + // nsITableLayoutStrategy implementation
1.30 + virtual nscoord GetMinWidth(nsRenderingContext* aRenderingContext) MOZ_OVERRIDE;
1.31 + virtual nscoord GetPrefWidth(nsRenderingContext* aRenderingContext,
1.32 + bool aComputingSize) MOZ_OVERRIDE;
1.33 + virtual void MarkIntrinsicWidthsDirty() MOZ_OVERRIDE;
1.34 + virtual void ComputeColumnWidths(const nsHTMLReflowState& aReflowState) MOZ_OVERRIDE;
1.35 +
1.36 +private:
1.37 + // NOTE: Using prefix "BTLS" to avoid overlapping names with
1.38 + // the values of nsLayoutUtils::IntrinsicWidthType
1.39 + enum BtlsWidthType { BTLS_MIN_WIDTH,
1.40 + BTLS_PREF_WIDTH,
1.41 + BTLS_FINAL_WIDTH };
1.42 +
1.43 + // Compute intrinsic width member variables on the columns.
1.44 + void ComputeColumnIntrinsicWidths(nsRenderingContext* aRenderingContext);
1.45 +
1.46 + // Distribute a colspanning cell's percent width (if any) to its columns.
1.47 + void DistributePctWidthToColumns(float aSpanPrefPct,
1.48 + int32_t aFirstCol,
1.49 + int32_t aColCount);
1.50 +
1.51 + // Distribute a width of some BltsWidthType type to a set of columns.
1.52 + // aWidth: The amount of width to be distributed
1.53 + // aFirstCol: The index (in the table) of the first column to be
1.54 + // considered for receiving width
1.55 + // aColCount: The number of consecutive columns (starting with aFirstCol)
1.56 + // to be considered for receiving width
1.57 + // aWidthType: The type of width being distributed. (BTLS_MIN_WIDTH and
1.58 + // BTLS_PREF_WIDTH are intended to be used for dividing up
1.59 + // colspan's min & pref width. BTLS_FINAL_WIDTH is intended
1.60 + // to be used for distributing the table's final width across
1.61 + // all its columns)
1.62 + // aSpanHasSpecifiedWidth: Should be true iff:
1.63 + // - We're distributing a colspanning cell's
1.64 + // pref or min width to its columns
1.65 + // - The colspanning cell has a specified width.
1.66 + void DistributeWidthToColumns(nscoord aWidth,
1.67 + int32_t aFirstCol,
1.68 + int32_t aColCount,
1.69 + BtlsWidthType aWidthType,
1.70 + bool aSpanHasSpecifiedWidth);
1.71 +
1.72 +
1.73 + // Compute the min and pref widths of the table from the width
1.74 + // variables on the columns.
1.75 + void ComputeIntrinsicWidths(nsRenderingContext* aRenderingContext);
1.76 +
1.77 + nsTableFrame *mTableFrame;
1.78 + nscoord mMinWidth;
1.79 + nscoord mPrefWidth;
1.80 + nscoord mPrefWidthPctExpand;
1.81 + nscoord mLastCalcWidth;
1.82 +};
1.83 +
1.84 +#endif /* !defined(BasicTableLayoutStrategy_h_) */
