WIP: snap-width

third_party/WebKit/Source/core/css/resolver/StyleBuilderCustom.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (c) 2011, Code Aurora Forum. All rights reserved.
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     }
 
     ASSERT(list->length() == 2);
     CSSPrimitiveValue* second = toCSSPrimitiveValue(list->item(1));
     ASSERT(second->isNumber());
     int position = second->getIntValue();
     ASSERT(position > 0 && position <= 100);
     state.style()->setSnapHeightPosition(position);
 }
 
+void StyleBuilderFunctions::applyInitialCSSPropertySnapWidth(StyleResolverState& state)
+{
+    state.style()->setSnapWidth(LayoutUnit());
+}
+
+void StyleBuilderFunctions::applyInheritCSSPropertySnapWidth(StyleResolverState& state)
+{
+    state.style()->setSnapWidth(state.parentStyle()->snapWidth());
+}
+
+void StyleBuilderFunctions::applyValueCSSPropertySnapWidth(StyleResolverState& state, CSSValue* value)
+{
+    CSSPrimitiveValue* primitiveValue = toCSSPrimitiveValue(value);
+    ASSERT(primitiveValue->isLength());
+    LayoutUnit unit = LayoutUnit::fromFloatCeil(primitiveValue->computeLength<float>(state.cssToLengthConversionData()));
+    ASSERT(unit >= 0);
+    const int kMaxSnapWidth = (1 << StyleRareNonInheritedData::kSnapWidthBits) - 1;
+    state.style()->setSnapWidth(std::min(unit, LayoutUnit(kMaxSnapWidth)));
+}
+
 void StyleBuilderFunctions::applyValueCSSPropertyTextAlign(StyleResolverState& state, CSSValue* value)
 {
     CSSPrimitiveValue* primitiveValue = toCSSPrimitiveValue(value);
     if (primitiveValue->isValueID() && primitiveValue->getValueID() != CSSValueWebkitMatchParent)
         state.style()->setTextAlign(primitiveValue->convertTo<ETextAlign>());
     else if (state.parentStyle()->textAlign() == TASTART)
         state.style()->setTextAlign(state.parentStyle()->isLeftToRightDirection() ? LEFT : RIGHT);
     else if (state.parentStyle()->textAlign() == TAEND)
         state.style()->setTextAlign(state.parentStyle()->isLeftToRightDirection() ? RIGHT : LEFT);
     else
@@ skipping 400 matching lines @@
     }
 }
 
 void StyleBuilderFunctions::applyInheritCSSPropertyPosition(StyleResolverState& state)
 {
     if (!state.parentNode()->isDocumentNode())
         state.style()->setPosition(state.parentStyle()->position());
 }
 
 } // namespace blink