Enable new multicol for testing and experimental web platform features.

Source/core/layout/LayoutBlock.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 48 matching lines @@
 #include "core/layout/line/InlineIterator.h"
 #include "core/layout/line/InlineTextBox.h"
 #include "core/layout/shapes/ShapeOutsideInfo.h"
 #include "core/layout/style/ContentData.h"
 #include "core/layout/style/LayoutStyle.h"
 #include "core/page/Page.h"
 #include "core/paint/BlockPainter.h"
 #include "core/paint/BoxPainter.h"
 #include "core/paint/DeprecatedPaintLayer.h"
 #include "core/paint/LayoutObjectDrawingRecorder.h"
+#include "platform/RuntimeEnabledFeatures.h"
 #include "platform/geometry/FloatQuad.h"
 #include "platform/geometry/TransformState.h"
 #include "wtf/StdLibExtras.h"
 #include "wtf/TemporaryChange.h"
 
 using namespace WTF;
 using namespace Unicode;
 
 namespace blink {
 
@@ skipping 763 matching lines @@
             ASSERT(beforeChild->parent() == this);
             if (beforeChild->parent() != this) {
                 // We should never reach here. If we do, we need to use the
                 // safe fallback to use the topmost beforeChild container.
                 beforeChild = beforeChildContainer;
             }
         }
     }
 
     // Check for a spanning element in columns.
-    if (gColumnFlowSplitEnabled && !document().regionBasedColumnsEnabled()) {
+    if (gColumnFlowSplitEnabled && !RuntimeEnabledFeatures::regionBasedColumnsEnabled()) {
         LayoutBlockFlow* columnsBlockAncestor = columnsBlockForSpanningElement(newChild);
         if (columnsBlockAncestor) {
             TemporaryChange<bool> columnFlowSplitEnabled(gColumnFlowSplitEnabled, false);
             // We are placing a column-span element inside a block.
             LayoutBlockFlow* newBox = createAnonymousColumnSpanBlock();
 
             if (columnsBlockAncestor != this && !isLayoutFlowThread()) {
                 // We are nested inside a multi-column element and are being split by the span. We have to break up
                 // our block into continuations.
                 LayoutBoxModelObject* oldContinuation = continuation();
@@ skipping 662 matching lines @@
 
     IntRect inflatedRect = pixelSnappedBorderBoxRect();
     LayoutTheme::theme().adjustPaintInvalidationRect(this, inflatedRect);
     addVisualOverflow(LayoutRect(inflatedRect));
 }
 
 bool LayoutBlock::createsNewFormattingContext() const
 {
     return isInlineBlockOrInlineTable() || isFloatingOrOutOfFlowPositioned() || hasOverflowClip() || isFlexItemIncludingDeprecated()
         || style()->specifiesColumns() || isLayoutFlowThread() || isTableCell() || isTableCaption() || isFieldset() || isWritingModeRoot()
-        || isDocumentElement() || (document().regionBasedColumnsEnabled() ? isColumnSpanAll() : style()->columnSpan()) || isGridItem();
+        || isDocumentElement() || (RuntimeEnabledFeatures::regionBasedColumnsEnabled() ? isColumnSpanAll() : style()->columnSpan()) || isGridItem();
 }
 
 void LayoutBlock::updateBlockChildDirtyBitsBeforeLayout(bool relayoutChildren, LayoutBox& child)
 {
     // FIXME: Technically percentage height objects only need a relayout if their percentage isn't going to be turned into
     // an auto value. Add a method to determine this, so that we can avoid the relayout.
     bool hasRelativeLogicalHeight = child.hasRelativeLogicalHeight() || (child.isAnonymous() && this->hasRelativeLogicalHeight());
     if (relayoutChildren || (hasRelativeLogicalHeight && !isLayoutView()))
         child.setChildNeedsLayout(MarkOnlyThis);
 
@@ skipping 1054 matching lines @@
 
 int LayoutBlock::columnGap() const
 {
     if (style()->hasNormalColumnGap())
         return style()->fontDescription().computedPixelSize(); // "1em" is recommended as the normal gap setting. Matches <p> margins.
     return static_cast<int>(style()->columnGap());
 }
 
 void LayoutBlock::calcColumnWidth()
 {
-    if (document().regionBasedColumnsEnabled())
+    if (RuntimeEnabledFeatures::regionBasedColumnsEnabled())
         return;
 
     // Calculate our column width and column count.
     // FIXME: Can overflow on fast/block/float/float-not-removed-from-next-sibling4.html, see https://bugs.webkit.org/show_bug.cgi?id=68744
     unsigned desiredColumnCount = 1;
     LayoutUnit desiredColumnWidth = contentLogicalWidth();
 
     // For now, we don't support multi-column layouts when printing, since we have to do a lot of work for proper pagination.
     if (document().paginated() || !style()->specifiesColumns()) {
         setDesiredColumnCountAndWidth(desiredColumnCount, desiredColumnWidth);
@@ skipping 326 matching lines @@
         toLayoutBlockFlow(const_cast<LayoutBlock*>(this))->computeInlinePreferredLogicalWidths(minLogicalWidth, maxLogicalWidth);
     } else {
         computeBlockPreferredLogicalWidths(minLogicalWidth, maxLogicalWidth);
     }
 
     maxLogicalWidth = std::max(minLogicalWidth, maxLogicalWidth);
 
     // The flow thread based multicol implementation will do this adjustment on the flow thread, and
     // not here on the multicol container, so that spanners won't incorrectly be treated as column
     // content (and have spanners' preferred widths multiplied by the number of columns, etc.).
-    if (style()->specifiesColumns() && !document().regionBasedColumnsEnabled())
+    if (style()->specifiesColumns() && !RuntimeEnabledFeatures::regionBasedColumnsEnabled())
         adjustIntrinsicLogicalWidthsForColumns(minLogicalWidth, maxLogicalWidth);
 
     if (isTableCell()) {
         Length tableCellWidth = toLayoutTableCell(this)->styleOrColLogicalWidth();
         if (tableCellWidth.isFixed() && tableCellWidth.value() > 0)
             maxLogicalWidth = std::max(minLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(tableCellWidth.value()));
     }
 
     int scrollbarWidth = intrinsicScrollbarLogicalWidth();
     maxLogicalWidth += scrollbarWidth;
@@ skipping 34 matching lines @@
 
     LayoutUnit borderAndPadding = borderAndPaddingLogicalWidth();
     m_minPreferredLogicalWidth += borderAndPadding;
     m_maxPreferredLogicalWidth += borderAndPadding;
 
     clearPreferredLogicalWidthsDirty();
 }
 
 void LayoutBlock::adjustIntrinsicLogicalWidthsForColumns(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const
 {
-    ASSERT(!document().regionBasedColumnsEnabled());
+    ASSERT(!RuntimeEnabledFeatures::regionBasedColumnsEnabled());
     if (!style()->hasAutoColumnCount() || !style()->hasAutoColumnWidth()) {
         // The min/max intrinsic widths calculated really tell how much space elements need when
         // laid out inside the columns. In order to eventually end up with the desired column width,
         // we need to convert them to values pertaining to the multicol container.
         int columnCount = style()->hasAutoColumnCount() ? 1 : style()->columnCount();
         LayoutUnit columnWidth;
         LayoutUnit gapExtra = (columnCount - 1) * columnGap();
         if (style()->hasAutoColumnWidth()) {
             minLogicalWidth = minLogicalWidth * columnCount + gapExtra;
         } else {
@@ skipping 915 matching lines @@
 void LayoutBlock::showLineTreeAndMark(const InlineBox* markedBox1, const char* markedLabel1, const InlineBox* markedBox2, const char* markedLabel2, const LayoutObject* obj) const
 {
     showLayoutObject();
     for (const RootInlineBox* root = firstRootBox(); root; root = root->nextRootBox())
         root->showLineTreeAndMark(markedBox1, markedLabel1, markedBox2, markedLabel2, obj, 1);
 }
 
 #endif
 
 } // namespace blink