1 files changed, 74 insertions, 0 deletions
diff --git a/layout/tables/BasicTableLayoutStrategy.h b/layout/tables/BasicTableLayoutStrategy.h
new file mode 100644
index 0000000000..d0aaef8ada
--- /dev/null
+++ b/layout/tables/BasicTableLayoutStrategy.h
@@ -0,0 +1,74 @@
+/* -*- 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 nsLayoutUtils::IntrinsicISizeType
+  enum BtlsISizeType { BTLS_MIN_ISIZE, BTLS_PREF_ISIZE, BTLS_FINAL_ISIZE };
+
+  // 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_) */