// Appends all applicable non-tag descendants of this node into the given element list.
void StyleSheetNode::GetApplicableDescendants(std::vector< const StyleSheetNode* >& applicable_nodes, const Element* element) const
{
// Check if this node matches this element.
switch (type)
{
ROCKET_UNUSED_SWITCH_ENUM(NUM_NODE_TYPES);
case ROOT:
case TAG:
{
// These nodes always match.
}
break;
case CLASS:
{
if (!element->IsClassSet(name))
return;
}
break;
case ID:
{
if (name != element->GetId())
return;
}
break;
case PSEUDO_CLASS:
{
if (!element->IsPseudoClassSet(name))
return;
}
break;
case STRUCTURAL_PSEUDO_CLASS:
{
if (selector == NULL)
return;
if (!selector->IsApplicable(element, a, b))
return;
}
break;
}
if (properties.GetNumProperties() > 0 ||
!children[PSEUDO_CLASS].empty())
applicable_nodes.push_back(this);
for (int i = CLASS; i < NUM_NODE_TYPES; i++)
{
// Don't recurse into pseudo-classes; they can't be built into the root definition.
if (i == PSEUDO_CLASS)
continue;
for (NodeMap::const_iterator j = children[i].begin(); j != children[i].end(); ++j)
(*j).second->GetApplicableDescendants(applicable_nodes, element);
}
}
// Returns an element's line height, if it has a font defined.
int ElementUtilities::GetLineHeight(Element* element)
{
FontFaceHandle* font_face_handle = element->GetFontFaceHandle();
if (font_face_handle == NULL)
return 0;
int line_height = font_face_handle->GetLineHeight();
float inch = element->GetRenderInterface()->GetPixelsPerInch();
const Property* line_height_property = element->GetLineHeightProperty();
switch (line_height_property->unit)
{
ROCKET_UNUSED_SWITCH_ENUM(Property::UNKNOWN);
ROCKET_UNUSED_SWITCH_ENUM(Property::KEYWORD);
ROCKET_UNUSED_SWITCH_ENUM(Property::STRING);
ROCKET_UNUSED_SWITCH_ENUM(Property::COLOUR);
ROCKET_UNUSED_SWITCH_ENUM(Property::ABSOLUTE_UNIT);
ROCKET_UNUSED_SWITCH_ENUM(Property::PPI_UNIT);
ROCKET_UNUSED_SWITCH_ENUM(Property::RELATIVE_UNIT);
case Property::NUMBER:
case Property::EM:
// If the property is a straight number or an em measurement, then it scales the line height.
return Math::Round(line_height_property->value.Get< float >() * line_height);
case Property::PERCENT:
// If the property is a percentage, then it scales the line height.
return Math::Round(line_height_property->value.Get< float >() * line_height * 0.01f);
case Property::PX:
// A px measurement.
return Math::Round(line_height_property->value.Get< float >());
case Property::INCH:
// Values based on pixels-per-inch.
return Math::Round(line_height_property->value.Get< float >() * inch);
case Property::CM:
return Math::Round(line_height_property->value.Get< float >() * inch * (1.0f / 2.54f));
case Property::MM:
return Math::Round(line_height_property->value.Get< float >() * inch * (1.0f / 25.4f));
case Property::PT:
return Math::Round(line_height_property->value.Get< float >() * inch * (1.0f / 72.0f));
case Property::PC:
return Math::Round(line_height_property->value.Get< float >() * inch * (1.0f / 6.0f));
}
return 0;
}
