*** DO NOT LAND *** Attempt to understand Regions complexity

Source/core/css/CSSComputedStyleDeclaration.cpp

 /*
  * Copyright (C) 2004 Zack Rusin <zack@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007 Nicholas Shanks <webkit@nickshanks.com>
  * Copyright (C) 2011 Sencha, Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
@@ skipping 311 matching lines @@
     CSSPropertyWebkitTransformOrigin,
     CSSPropertyWebkitTransformStyle,
     CSSPropertyWebkitTransitionDelay,
     CSSPropertyWebkitTransitionDuration,
     CSSPropertyWebkitTransitionProperty,
     CSSPropertyWebkitTransitionTimingFunction,
     CSSPropertyWebkitUserDrag,
     CSSPropertyWebkitUserModify,
     CSSPropertyWebkitUserSelect,
     CSSPropertyWebkitWritingMode,
-    CSSPropertyWebkitFlowInto,
-    CSSPropertyWebkitFlowFrom,
-    CSSPropertyWebkitRegionBreakAfter,
-    CSSPropertyWebkitRegionBreakBefore,
-    CSSPropertyWebkitRegionBreakInside,
-    CSSPropertyWebkitRegionFragment,
     CSSPropertyWebkitAppRegion,
     CSSPropertyWebkitWrapFlow,
     CSSPropertyWebkitWrapThrough,
     CSSPropertyBufferedRendering,
     CSSPropertyClipPath,
     CSSPropertyClipRule,
     CSSPropertyMask,
     CSSPropertyFilter,
     CSSPropertyFloodColor,
     CSSPropertyFloodOpacity,
@@ skipping 979 matching lines @@
             const CounterContent* counter = static_cast<const CounterContentData*>(contentData)->counter();
             ASSERT(counter);
             list->append(cssValuePool().createValue(counter->identifier(), CSSPrimitiveValue::CSS_COUNTER_NAME));
         } else if (contentData->isImage()) {
             const StyleImage* image = static_cast<const ImageContentData*>(contentData)->image();
             ASSERT(image);
             list->append(image->cssValue());
         } else if (contentData->isText())
             list->append(cssValuePool().createValue(static_cast<const TextContentData*>(contentData)->text(), CSSPrimitiveValue::CSS_STRING));
     }
-    if (style.hasFlowFrom())
-        list->append(cssValuePool().createValue(style.regionThread(), CSSPrimitiveValue::CSS_STRING));
     return list.release();
 }
 
 static PassRefPtr<CSSValue> valueForCounterDirectives(const RenderStyle& style, CSSPropertyID propertyID)
 {
     const CounterDirectiveMap* map = style.counterDirectives();
     if (!map)
         return 0;
 
     RefPtr<CSSValueList> list = CSSValueList::createSpaceSeparated();
@@ skipping 447 matching lines @@
             return cssValuePool().createColorValue(m_allowVisitedStyle ? style->visitedDependentColor(CSSPropertyColor).rgb() : style->color().rgb());
         case CSSPropertyWebkitPrintColorAdjust:
             return cssValuePool().createValue(style->printColorAdjust());
         case CSSPropertyWebkitColumnAxis:
             return cssValuePool().createValue(style->columnAxis());
         case CSSPropertyWebkitColumnCount:
             if (style->hasAutoColumnCount())
                 return cssValuePool().createIdentifierValue(CSSValueAuto);
             return cssValuePool().createValue(style->columnCount(), CSSPrimitiveValue::CSS_NUMBER);
         case CSSPropertyColumnFill:
-            if (RuntimeEnabledFeatures::regionBasedColumnsEnabled())
-                return cssValuePool().createValue(style->columnFill());
             return 0;
         case CSSPropertyWebkitColumnGap:
             if (style->hasNormalColumnGap())
                 return cssValuePool().createIdentifierValue(CSSValueNormal);
             return zoomAdjustedPixelValue(style->columnGap(), *style);
         case CSSPropertyWebkitColumnProgression:
             return cssValuePool().createValue(style->columnProgression());
         case CSSPropertyWebkitColumnRuleColor:
             return m_allowVisitedStyle ? cssValuePool().createColorValue(style->visitedDependentColor(CSSPropertyOutlineColor).rgb()) : currentColorOrValidColor(*style, style->columnRuleColor());
         case CSSPropertyWebkitColumnRuleStyle:
             return cssValuePool().createValue(style->columnRuleStyle());
         case CSSPropertyWebkitColumnRuleWidth:
             return zoomAdjustedPixelValue(style->columnRuleWidth(), *style);
         case CSSPropertyWebkitColumnSpan:
             return cssValuePool().createIdentifierValue(style->columnSpan() ? CSSValueAll : CSSValueNone);
         case CSSPropertyWebkitColumnBreakAfter:
             return cssValuePool().createValue(style->columnBreakAfter());
         case CSSPropertyWebkitColumnBreakBefore:
             return cssValuePool().createValue(style->columnBreakBefore());
         case CSSPropertyWebkitColumnBreakInside:
             return cssValuePool().createValue(style->columnBreakInside());
         case CSSPropertyWebkitColumnWidth:
             if (style->hasAutoColumnWidth())
                 return cssValuePool().createIdentifierValue(CSSValueAuto);
             return zoomAdjustedPixelValue(style->columnWidth(), *style);
         case CSSPropertyTabSize:
             return cssValuePool().createValue(style->tabSize(), CSSPrimitiveValue::CSS_NUMBER);
-        case CSSPropertyWebkitRegionBreakAfter:
-            return cssValuePool().createValue(style->regionBreakAfter());
-        case CSSPropertyWebkitRegionBreakBefore:
-            return cssValuePool().createValue(style->regionBreakBefore());
-        case CSSPropertyWebkitRegionBreakInside:
-            return cssValuePool().createValue(style->regionBreakInside());
         case CSSPropertyCursor: {
             RefPtr<CSSValueList> list;
             CursorList* cursors = style->cursors();
             if (cursors && cursors->size() > 0) {
                 list = CSSValueList::createCommaSeparated();
                 for (unsigned i = 0; i < cursors->size(); ++i)
                     if (StyleImage* image = cursors->at(i).image())
                         list->append(image->cssValue());
             }
             RefPtr<CSSValue> value = cssValuePool().createValue(style->cursor());
@@ skipping 768 matching lines @@
         case CSSPropertyCounterReset:
             return valueForCounterDirectives(*style, propertyID);
         case CSSPropertyWebkitClipPath:
             if (ClipPathOperation* operation = style->clipPath()) {
                 if (operation->type() == ClipPathOperation::SHAPE)
                     return valueForBasicShape(*style, toShapeClipPathOperation(operation)->basicShape());
                 if (operation->type() == ClipPathOperation::REFERENCE)
                     return CSSPrimitiveValue::create(toReferenceClipPathOperation(operation)->url(), CSSPrimitiveValue::CSS_URI);
             }
             return cssValuePool().createIdentifierValue(CSSValueNone);
-        case CSSPropertyWebkitFlowInto:
-            if (style->flowThread().isNull())
-                return cssValuePool().createIdentifierValue(CSSValueNone);
-            return cssValuePool().createValue(style->flowThread(), CSSPrimitiveValue::CSS_STRING);
-        case CSSPropertyWebkitFlowFrom:
-            if (!style->hasFlowFrom())
-                return cssValuePool().createIdentifierValue(CSSValueNone);
-            return cssValuePool().createValue(style->regionThread(), CSSPrimitiveValue::CSS_STRING);
-        case CSSPropertyWebkitRegionFragment:
-            return cssValuePool().createValue(style->regionFragment());
         case CSSPropertyWebkitWrapFlow:
             return cssValuePool().createValue(style->wrapFlow());
         case CSSPropertyShapeMargin:
             return cssValuePool().createValue(style->shapeMargin());
         case CSSPropertyShapePadding:
             return cssValuePool().createValue(style->shapePadding());
         case CSSPropertyShapeImageThreshold:
             return cssValuePool().createValue(style->shapeImageThreshold(), CSSPrimitiveValue::CSS_NUMBER);
         case CSSPropertyShapeInside:
             if (!style->shapeInside())
@@ skipping 495 matching lines @@
     static const CSSPropertyID propertiesAfterSlashSeperator[3] = { CSSPropertyBackgroundSize, CSSPropertyBackgroundOrigin,
                                                                     CSSPropertyBackgroundClip };
 
     RefPtr<CSSValueList> list = CSSValueList::createSlashSeparated();
     list->append(valuesForShorthandProperty(StylePropertyShorthand(CSSPropertyBackground, propertiesBeforeSlashSeperator, WTF_ARRAY_LENGTH(propertiesBeforeSlashSeperator))));
     list->append(valuesForShorthandProperty(StylePropertyShorthand(CSSPropertyBackground, propertiesAfterSlashSeperator, WTF_ARRAY_LENGTH(propertiesAfterSlashSeperator))));
     return list.release();
 }
 
 } // namespace WebCore