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

Source/core/css/parser/BisonCSSParser-in.cpp

 /*
  * Copyright (C) 2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Nicholas Shanks <webkit@nickshanks.com>
  * Copyright (C) 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2012 Adobe Systems Incorporated. All rights reserved.
  * Copyright (C) 2012 Intel Corporation. All rights reserved.
  *
@@ skipping 657 matching lines @@
             return true;
         break;
     case CSSPropertyWebkitBoxPack:
         if (valueID == CSSValueStart || valueID == CSSValueEnd || valueID == CSSValueCenter || valueID == CSSValueJustify)
             return true;
         break;
     case CSSPropertyInternalCallback:
         // This property is only injected programmatically, not parsed from stylesheets.
         return false;
     case CSSPropertyColumnFill:
-        if (RuntimeEnabledFeatures::regionBasedColumnsEnabled()) {
-            if (valueID == CSSValueAuto || valueID == CSSValueBalance)
-                return true;
-        }
         break;
     case CSSPropertyAlignContent:
         // FIXME: Per CSS alignment, this property should accept an optional <overflow-position>. We should share this parsing code with 'justify-self'.
          if (valueID == CSSValueFlexStart || valueID == CSSValueFlexEnd || valueID == CSSValueCenter || valueID == CSSValueSpaceBetween || valueID == CSSValueSpaceAround || valueID == CSSValueStretch)
              return true;
          break;
     case CSSPropertyAlignItems:
         // FIXME: Per CSS alignment, this property should accept the same arguments as 'justify-self' so we should share its parsing code.
         if (valueID == CSSValueFlexStart || valueID == CSSValueFlexEnd || valueID == CSSValueCenter || valueID == CSSValueBaseline || valueID == CSSValueStretch)
             return true;
@@ skipping 53 matching lines @@
             return true;
         break;
     case CSSPropertyInternalMarqueeStyle:
         if (valueID == CSSValueNone || valueID == CSSValueSlide || valueID == CSSValueScroll || valueID == CSSValueAlternate)
             return true;
         break;
     case CSSPropertyWebkitPrintColorAdjust:
         if (valueID == CSSValueExact || valueID == CSSValueEconomy)
             return true;
         break;
-    case CSSPropertyWebkitRegionBreakAfter:
-    case CSSPropertyWebkitRegionBreakBefore:
-        if (RuntimeEnabledFeatures::cssRegionsEnabled() && (valueID == CSSValueAuto || valueID == CSSValueAlways || valueID == CSSValueAvoid || valueID == CSSValueLeft || valueID == CSSValueRight))
-            return true;
-        break;
-    case CSSPropertyWebkitRegionBreakInside:
-        if (RuntimeEnabledFeatures::cssRegionsEnabled() && (valueID == CSSValueAuto || valueID == CSSValueAvoid))
-            return true;
-        break;
-    case CSSPropertyWebkitRegionFragment:
-        if (RuntimeEnabledFeatures::cssRegionsEnabled() && (valueID == CSSValueAuto || valueID == CSSValueBreak))
-            return true;
-        break;
     case CSSPropertyWebkitRtlOrdering:
         if (valueID == CSSValueLogical || valueID == CSSValueVisual)
             return true;
         break;
 
     case CSSPropertyWebkitRubyPosition:
         if (valueID == CSSValueBefore || valueID == CSSValueAfter)
             return true;
         break;
 
@@ skipping 133 matching lines @@
     case CSSPropertyWebkitLineAlign:
     case CSSPropertyWebkitLineBreak:
     case CSSPropertyWebkitLineSnap:
     case CSSPropertyWebkitMarginAfterCollapse:
     case CSSPropertyWebkitMarginBeforeCollapse:
     case CSSPropertyWebkitMarginBottomCollapse:
     case CSSPropertyWebkitMarginTopCollapse:
     case CSSPropertyInternalMarqueeDirection:
     case CSSPropertyInternalMarqueeStyle:
     case CSSPropertyWebkitPrintColorAdjust:
-    case CSSPropertyWebkitRegionBreakAfter:
-    case CSSPropertyWebkitRegionBreakBefore:
-    case CSSPropertyWebkitRegionBreakInside:
-    case CSSPropertyWebkitRegionFragment:
     case CSSPropertyWebkitRtlOrdering:
     case CSSPropertyWebkitRubyPosition:
     case CSSPropertyWebkitTextCombine:
     case CSSPropertyWebkitTextEmphasisPosition:
     case CSSPropertyWebkitTextSecurity:
     case CSSPropertyWebkitTransformStyle:
     case CSSPropertyWebkitUserDrag:
     case CSSPropertyWebkitUserModify:
     case CSSPropertyWebkitUserSelect:
     case CSSPropertyWebkitWrapFlow:
@@ skipping 1394 matching lines @@
             validPrimitive = true;
         else
             validPrimitive = validUnit(value, FInteger | FNonNeg);
         break;
     case CSSPropertyInternalMarqueeSpeed:
         if (id == CSSValueNormal || id == CSSValueSlow || id == CSSValueFast)
             validPrimitive = true;
         else
             validPrimitive = validUnit(value, FTime | FInteger | FNonNeg);
         break;
-    case CSSPropertyWebkitFlowInto:
-        if (!RuntimeEnabledFeatures::cssRegionsEnabled())
-            return false;
-        return parseFlowThread(propId, important);
-    case CSSPropertyWebkitFlowFrom:
-        if (!RuntimeEnabledFeatures::cssRegionsEnabled())
-            return false;
-        return parseRegionThread(propId, important);
     case CSSPropertyWebkitTransform:
         if (id == CSSValueNone)
             validPrimitive = true;
         else {
             RefPtr<CSSValue> transformValue = parseTransform();
             if (transformValue) {
                 addProperty(propId, transformValue.release(), important);
                 return true;
             }
             return false;
@@ skipping 469 matching lines @@
     case CSSPropertyWebkitLineAlign:
     case CSSPropertyWebkitLineBreak:
     case CSSPropertyWebkitLineSnap:
     case CSSPropertyWebkitMarginAfterCollapse:
     case CSSPropertyWebkitMarginBeforeCollapse:
     case CSSPropertyWebkitMarginBottomCollapse:
     case CSSPropertyWebkitMarginTopCollapse:
     case CSSPropertyInternalMarqueeDirection:
     case CSSPropertyInternalMarqueeStyle:
     case CSSPropertyWebkitPrintColorAdjust:
-    case CSSPropertyWebkitRegionBreakAfter:
-    case CSSPropertyWebkitRegionBreakBefore:
-    case CSSPropertyWebkitRegionBreakInside:
-    case CSSPropertyWebkitRegionFragment:
     case CSSPropertyWebkitRtlOrdering:
     case CSSPropertyWebkitRubyPosition:
     case CSSPropertyWebkitTextCombine:
     case CSSPropertyWebkitTextEmphasisPosition:
     case CSSPropertyWebkitTextSecurity:
     case CSSPropertyWebkitTransformStyle:
     case CSSPropertyWebkitUserDrag:
     case CSSPropertyWebkitUserModify:
     case CSSPropertyWebkitUserSelect:
     case CSSPropertyWebkitWrapFlow:
@@ skipping 5873 matching lines @@
             if (!filterValue)
                 return 0;
 
             list->append(filterValue);
         }
     }
 
     return list.release();
 }
 
-static bool validFlowName(const String& flowName)
-{
-    return !(equalIgnoringCase(flowName, "auto")
-            || equalIgnoringCase(flowName, "default")
-            || equalIgnoringCase(flowName, "inherit")
-            || equalIgnoringCase(flowName, "initial")
-            || equalIgnoringCase(flowName, "none"));
-}
-
-// none | <ident>
-bool BisonCSSParser::parseFlowThread(CSSPropertyID propId, bool important)
-{
-    ASSERT(propId == CSSPropertyWebkitFlowInto);
-    ASSERT(RuntimeEnabledFeatures::cssRegionsEnabled());
-
-    if (m_valueList->size() != 1)
-        return false;
-
-    CSSParserValue* value = m_valueList->current();
-    if (!value)
-        return false;
-
-    if (value->unit != CSSPrimitiveValue::CSS_IDENT)
-        return false;
-
-    if (value->id == CSSValueNone) {
-        addProperty(propId, cssValuePool().createIdentifierValue(value->id), important);
-        return true;
-    }
-
-    String inputProperty = String(value->string);
-    if (!inputProperty.isEmpty()) {
-        if (!validFlowName(inputProperty))
-            return false;
-        addProperty(propId, cssValuePool().createValue(inputProperty, CSSPrimitiveValue::CSS_STRING), important);
-    } else
-        addProperty(propId, cssValuePool().createIdentifierValue(CSSValueNone), important);
-
-    return true;
-}
-
-// -webkit-flow-from: none | <ident>
-bool BisonCSSParser::parseRegionThread(CSSPropertyID propId, bool important)
-{
-    ASSERT(propId == CSSPropertyWebkitFlowFrom);
-    ASSERT(RuntimeEnabledFeatures::cssRegionsEnabled());
-
-    if (m_valueList->size() != 1)
-        return false;
-
-    CSSParserValue* value = m_valueList->current();
-    if (!value)
-        return false;
-
-    if (value->unit != CSSPrimitiveValue::CSS_IDENT)
-        return false;
-
-    if (value->id == CSSValueNone)
-        addProperty(propId, cssValuePool().createIdentifierValue(value->id), important);
-    else {
-        String inputProperty = String(value->string);
-        if (!inputProperty.isEmpty()) {
-            if (!validFlowName(inputProperty))
-                return false;
-            addProperty(propId, cssValuePool().createValue(inputProperty, CSSPrimitiveValue::CSS_STRING), important);
-        } else
-            addProperty(propId, cssValuePool().createIdentifierValue(CSSValueNone), important);
-    }
-
-    return true;
-}
-
 bool BisonCSSParser::parseTransformOrigin(CSSPropertyID propId, CSSPropertyID& propId1, CSSPropertyID& propId2, CSSPropertyID& propId3, RefPtr<CSSValue>& value, RefPtr<CSSValue>& value2, RefPtr<CSSValue>& value3)
 {
     propId1 = propId;
     propId2 = propId;
     propId3 = propId;
     if (propId == CSSPropertyWebkitTransformOrigin) {
         propId1 = CSSPropertyWebkitTransformOriginX;
         propId2 = CSSPropertyWebkitTransformOriginY;
         propId3 = CSSPropertyWebkitTransformOriginZ;
     }
@@ skipping 1009 matching lines @@
         selectorVector.append(pageSelector);
         rule->parserAdoptSelectorVector(selectorVector);
         rule->setProperties(createStylePropertySet());
         pageRule = rule.get();
         m_parsedRules.append(rule.release());
     }
     clearProperties();
     return pageRule;
 }
 
-void BisonCSSParser::setReusableRegionSelectorVector(Vector<OwnPtr<CSSParserSelector> >* selectors)
-{
-    if (selectors)
-        m_reusableRegionSelectorVector.swap(*selectors);
-}
-
-StyleRuleBase* BisonCSSParser::createRegionRule(Vector<OwnPtr<CSSParserSelector> >* regionSelector, RuleList* rules)
-{
-    if (m_useCounter)
-        m_useCounter->count(UseCounter::CSSWebkitRegionAtRule);
-
-    if (!RuntimeEnabledFeatures::cssRegionsEnabled() || !regionSelector || !rules)
-        return 0;
-
-    m_allowImportRules = m_allowNamespaceDeclarations = false;
-
-    RefPtr<StyleRuleRegion> regionRule = StyleRuleRegion::create(regionSelector, *rules);
-
-    StyleRuleRegion* result = regionRule.get();
-    m_parsedRules.append(regionRule.release());
-    if (m_observer)
-        m_observer->startEndUnknownRule();
-
-    return result;
-}
-
 StyleRuleBase* BisonCSSParser::createMarginAtRule(CSSSelector::MarginBoxType /* marginBox */)
 {
     // FIXME: Implement margin at-rule here, using:
     //        - marginBox: margin box
     //        - m_parsedProperties: properties at [m_numParsedPropertiesBeforeMarginBox, m_parsedProperties.size()] are for this at-rule.
     // Don't forget to also update the action for page symbol in CSSGrammar.y such that margin at-rule data is cleared if page_selector is invalid.
 
     endDeclarationsForMarginBox();
     return 0; // until this method is implemented.
 }
@@ skipping 299 matching lines @@
 {
     // The tokenizer checks for the construct of an+b.
     // However, since the {ident} rule precedes the {nth} rule, some of those
     // tokens are identified as string literal. Furthermore we need to accept
     // "odd" and "even" which does not match to an+b.
     return equalIgnoringCase(token, "odd") || equalIgnoringCase(token, "even")
         || equalIgnoringCase(token, "n") || equalIgnoringCase(token, "-n");
 }
 
 }