Implement CSS3TextDecorations runtime flag in favor of CSS3_TEXT

Source/core/rendering/InlineTextBox.cpp

 /*
  * (C) 1999 Lars Knoll (knoll@kde.org)
  * (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. 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
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 906 matching lines @@
     context->drawHighlightForText(font, constructTextRun(style, font), localOrigin, selHeight, c, style->colorSpace(), sPos, ePos);
 }
 
 static StrokeStyle textDecorationStyleToStrokeStyle(TextDecorationStyle decorationStyle)
 {
     StrokeStyle strokeStyle = SolidStroke;
     switch (decorationStyle) {
     case TextDecorationStyleSolid:
         strokeStyle = SolidStroke;
         break;
-#if ENABLE(CSS3_TEXT)
     case TextDecorationStyleDouble:
         strokeStyle = DoubleStroke;
         break;
     case TextDecorationStyleDotted:
         strokeStyle = DottedStroke;
         break;
     case TextDecorationStyleDashed:
         strokeStyle = DashedStroke;
         break;
     case TextDecorationStyleWavy:
         strokeStyle = WavyStroke;
         break;
-#endif // CSS3_TEXT
     }
 
     return strokeStyle;
 }
 
 #if ENABLE(CSS3_TEXT)
 static int computeUnderlineOffset(const TextUnderlinePosition underlinePosition, const FontMetrics& fontMetrics, const InlineTextBox* inlineTextBox, const int textDecorationThickness)
 {
     // Compute the gap between the font and the underline. Use at least one
     // pixel gap, if underline is thick then use a bigger gap.
@@ skipping 12 matching lines @@
             return inlineTextBox->logicalHeight() + gap + offset;
         return inlineTextBox->logicalHeight() + gap;
     }
     }
 
     ASSERT_NOT_REACHED();
     return fontMetrics.ascent() + gap;
 }
 #endif // CSS3_TEXT
 
-#if ENABLE(CSS3_TEXT)
 static void adjustStepToDecorationLength(float& step, float& controlPointDistance, float length)
 {
     ASSERT(step > 0);
 
     if (length <= 0)
         return;
 
     unsigned stepCount = static_cast<unsigned>(length / step);
 
     // Each Bezier curve starts at the same pixel that the previous one
@@ skipping 101 matching lines @@
             controlPoint1.setX(x + step);
             controlPoint2.setX(x + step);
             x += 2 * step;
             path.addBezierCurveTo(controlPoint1, controlPoint2, FloatPoint(x, yAxis));
         }
     }
 
     context->setShouldAntialias(true);
     context->strokePath(path);
 }
-#endif // CSS3_TEXT
 
 void InlineTextBox::paintDecoration(GraphicsContext* context, const FloatPoint& boxOrigin, ETextDecoration deco, TextDecorationStyle decorationStyle, const ShadowData* shadow)
 {
     // FIXME: We should improve this rule and not always just assume 1.
     const float textDecorationThickness = 1.f;
 
     if (m_truncation == cFullTruncation)
         return;
 
     FloatPoint localOrigin = boxOrigin;
@@ skipping 50 matching lines @@
                 localOrigin.move(0, -extraOffset);
                 extraOffset = 0;
             }
             int shadowX = isHorizontal() ? shadow->x() : shadow->y();
             int shadowY = isHorizontal() ? shadow->y() : -shadow->x();
             context->setShadow(FloatSize(shadowX, shadowY - extraOffset), shadow->blur(), shadow->color(), colorSpace);
             setShadow = true;
             shadow = shadow->next();
         }
 
-#if ENABLE(CSS3_TEXT)
         // Offset between lines - always non-zero, so lines never cross each other.
         float doubleOffset = textDecorationThickness + 1.f;
-#endif // CSS3_TEXT
         context->setStrokeStyle(textDecorationStyleToStrokeStyle(decorationStyle));
         if (deco & UNDERLINE) {
             context->setStrokeColor(underline, colorSpace);
 #if ENABLE(CSS3_TEXT)
             TextUnderlinePosition underlinePosition = styleToUse->textUnderlinePosition();
             const int underlineOffset = computeUnderlineOffset(underlinePosition, styleToUse->fontMetrics(), this, textDecorationThickness);
+#else
+            const int underlineOffset = styleToUse->fontMetrics().ascent() + max<int>(1, ceilf(textDecorationThickness / 2.0));
+#endif // CSS3_TEXT
 
             switch (decorationStyle) {
             case TextDecorationStyleWavy: {
                 FloatPoint start(localOrigin.x(), localOrigin.y() + underlineOffset + doubleOffset);
                 FloatPoint end(localOrigin.x() + width, localOrigin.y() + underlineOffset + doubleOffset);
                 strokeWavyTextDecoration(context, start, end, textDecorationThickness);
                 break;
             }
             default:
                 context->drawLineForText(FloatPoint(localOrigin.x(), localOrigin.y() + underlineOffset), width, isPrinting);
 
                 if (decorationStyle == TextDecorationStyleDouble)
                     context->drawLineForText(FloatPoint(localOrigin.x(), localOrigin.y() + underlineOffset + doubleOffset), width, isPrinting);
             }
-#else
-            // Leave one pixel of white between the baseline and the underline.
-            context->drawLineForText(FloatPoint(localOrigin.x(), localOrigin.y() + baseline + 1), width, isPrinting);
-#endif // CSS3_TEXT
         }
         if (deco & OVERLINE) {
             context->setStrokeColor(overline, colorSpace);
-#if ENABLE(CSS3_TEXT)
             switch (decorationStyle) {
             case TextDecorationStyleWavy: {
                 FloatPoint start(localOrigin.x(), localOrigin.y() - doubleOffset);
                 FloatPoint end(localOrigin.x() + width, localOrigin.y() - doubleOffset);
                 strokeWavyTextDecoration(context, start, end, textDecorationThickness);
                 break;
             }
             default:
-#endif // CSS3_TEXT
                 context->drawLineForText(localOrigin, width, isPrinting);
-#if ENABLE(CSS3_TEXT)
                 if (decorationStyle == TextDecorationStyleDouble)
                     context->drawLineForText(FloatPoint(localOrigin.x(), localOrigin.y() - doubleOffset), width, isPrinting);
             }
-#endif // CSS3_TEXT
         }
         if (deco & LINE_THROUGH) {
             context->setStrokeColor(linethrough, colorSpace);
-#if ENABLE(CSS3_TEXT)
             switch (decorationStyle) {
             case TextDecorationStyleWavy: {
                 FloatPoint start(localOrigin.x(), localOrigin.y() + 2 * baseline / 3);
                 FloatPoint end(localOrigin.x() + width, localOrigin.y() + 2 * baseline / 3);
                 strokeWavyTextDecoration(context, start, end, textDecorationThickness);
                 break;
             }
             default:
-#endif // CSS3_TEXT
                 context->drawLineForText(FloatPoint(localOrigin.x(), localOrigin.y() + 2 * baseline / 3), width, isPrinting);
-#if ENABLE(CSS3_TEXT)
                 if (decorationStyle == TextDecorationStyleDouble)
                     context->drawLineForText(FloatPoint(localOrigin.x(), localOrigin.y() + doubleOffset + 2 * baseline / 3), width, isPrinting);
             }
-#endif // CSS3_TEXT
         }
     } while (shadow);
 
     if (setClip)
         context->restore();
     else if (setShadow)
         context->clearShadow();
 }
 
 static GraphicsContext::DocumentMarkerLineStyle lineStyleForMarkerType(DocumentMarker::MarkerType markerType)
@@ skipping 359 matching lines @@
 
 void InlineTextBox::reportMemoryUsage(MemoryObjectInfo* memoryObjectInfo) const
 {
     MemoryClassInfo info(memoryObjectInfo, this, WebCoreMemoryTypes::Rendering);
     InlineBox::reportMemoryUsage(memoryObjectInfo);
     info.addMember(m_prevTextBox, "prevTextBox");
     info.addMember(m_nextTextBox, "nextTextBox");
 }
 
 } // namespace WebCore