Support display: contents for elements, first-line and first-letter pseudos.

third_party/WebKit/Source/core/html/HTMLOptionElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2004, 2005, 2006, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2011 Motorola Mobility, Inc.  All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 72 matching lines @@
     element->setValue(value);
   if (defaultSelected)
     element->setAttribute(selectedAttr, emptyAtom);
   element->setSelected(selected);
 
   return element;
 }
 
 void HTMLOptionElement::attachLayoutTree(const AttachContext& context) {
   AttachContext optionContext(context);
-  if (context.resolvedStyle) {
-    DCHECK(!m_style || m_style == context.resolvedStyle);
-    m_style = context.resolvedStyle;
-  } else if (parentComputedStyle()) {
-    updateNonComputedStyle();
-    optionContext.resolvedStyle = m_style.get();
+  RefPtr<ComputedStyle> resolvedStyle;
+  if (!context.resolvedStyle && parentComputedStyle()) {
+    if (HTMLSelectElement* select = ownerSelectElement())
+      select->updateListOnLayoutObject();
+    resolvedStyle = originalStyleForLayoutObject();
+    optionContext.resolvedStyle = resolvedStyle.get();
   }
   HTMLElement::attachLayoutTree(optionContext);
 }
 
 void HTMLOptionElement::detachLayoutTree(const AttachContext& context) {
-  m_style.clear();
   HTMLElement::detachLayoutTree(context);
 }
 
 bool HTMLOptionElement::supportsFocus() const {
   HTMLSelectElement* select = ownerSelectElement();
   if (select && select->usesMenuList())
     return false;
   return HTMLElement::supportsFocus();
 }
 
@@ skipping 208 matching lines @@
     return label;
   return collectOptionInnerText()
       .stripWhiteSpace(isHTMLSpace<UChar>)
       .simplifyWhiteSpace(isHTMLSpace<UChar>);
 }
 
 void HTMLOptionElement::setLabel(const AtomicString& label) {
   setAttribute(labelAttr, label);
 }
 
-void HTMLOptionElement::updateNonComputedStyle() {
-  m_style = originalStyleForLayoutObject();
-  if (HTMLSelectElement* select = ownerSelectElement())
-    select->updateListOnLayoutObject();
-}
-
-ComputedStyle* HTMLOptionElement::nonLayoutObjectComputedStyle() const {
-  return m_style.get();
-}
-
-PassRefPtr<ComputedStyle> HTMLOptionElement::customStyleForLayoutObject() {
-  updateNonComputedStyle();
-  return m_style;
-}
-
 String HTMLOptionElement::textIndentedToRespectGroupLabel() const {
   ContainerNode* parent = parentNode();
   if (parent && isHTMLOptGroupElement(*parent))
     return "    " + displayLabel();
   return displayLabel();
 }
 
 bool HTMLOptionElement::ownElementDisabled() const {
   return fastHasAttribute(disabledAttr);
 }
@@ skipping 66 matching lines @@
 }
 
 bool HTMLOptionElement::spatialNavigationFocused() const {
   HTMLSelectElement* select = ownerSelectElement();
   if (!select || !select->isFocused())
     return false;
   return select->spatialNavigationFocusedOption() == this;
 }
 
 bool HTMLOptionElement::isDisplayNone() const {
-  // If m_style is not set, then the node is still unattached.
+  // If the style is not set, then the node is still unattached.
   // We have to wait till it gets attached to read the display property.
-  if (!m_style)
+  const ComputedStyle* style = nonLayoutObjectComputedStyle();
+  if (!style)
     return false;
 
-  if (m_style->display() != EDisplay::None) {
+  if (style->display() != EDisplay::None) {
     // We need to check the parent's display property.  Parent's
     // display:none doesn't override children's display properties in
     // ComputedStyle.
     Element* parent = parentElement();
     DCHECK(parent);
     if (isHTMLOptGroupElement(*parent)) {
       const ComputedStyle* parentStyle = parent->computedStyle()
                                              ? parent->computedStyle()
                                              : parent->ensureComputedStyle();
       return !parentStyle || parentStyle->display() == EDisplay::None;
     }
   }
-  return m_style->display() == EDisplay::None;
+  return style->display() == EDisplay::None;
 }
 
 String HTMLOptionElement::innerText() {
   // A workaround for crbug.com/424578. We add ShadowRoot to an OPTION, but
   // innerText behavior for Shadow DOM is unclear.  We just return the same
   // string before adding ShadowRoot.
   return textContent();
 }
 
 }  // namespace blink