Add m-esr52 at 52.6.0

1 files changed, 81 insertions, 0 deletions

diff --git a/layout/tables/BasicTableLayoutStrategy.h b/layout/tables/BasicTableLayoutStrategy.h
new file mode 100644
index 000000000..082da8fb3
--- /dev/null
+++ b/layout/tables/BasicTableLayoutStrategy.h
@@ -0,0 +1,81 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+// 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(nsRenderingContext* aRenderingContext) override;
+    virtual nscoord GetPrefISize(nsRenderingContext* 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(nsRenderingContext* 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(nsRenderingContext* aRenderingContext);
+
+    nsTableFrame *mTableFrame;
+    nscoord mMinISize;
+    nscoord mPrefISize;
+    nscoord mPrefISizePctExpand;
+    nscoord mLastCalcISize;
+};
+
+#endif /* !defined(BasicTableLayoutStrategy_h_) */