Source/build/scripts/templates/ElementTypeHelpers.h.tmpl

{% from "macros.tmpl" import license %}
{{ license() }}

#ifndef {{namespace}}ElementTypeHelpers_h
#define {{namespace}}ElementTypeHelpers_h

#include "core/dom/Element.h"
#include "{{namespace}}Names.h"
#include "platform/RuntimeEnabledFeatures.h"

namespace blink {
// Type checking.
{% for tag in tags|sort if not tag.multipleTagNames and not tag.noTypeHelpers %}
{% filter enable_conditional(tag.Conditional) %}
class {{tag.interface}};
void is{{tag.interface}}(const {{tag.interface}}&); // Catch unnecessary runtime check of type known at compile time.
void is{{tag.interface}}(const {{tag.interface}}*); // Catch unnecessary runtime check of type known at compile time.

inline bool is{{tag.interface}}(const {{namespace}}Element& element) {
    {% if tag.runtimeEnabled %}
    if (!RuntimeEnabledFeatures::{{tag.runtimeEnabled}}Enabled())
        return false;
    {% endif %}
    return element.hasTagName({{namespace}}Names::{{tag|symbol}}Tag);
}
inline bool is{{tag.interface}}(const {{namespace}}Element* element) { return element && is{{tag.interface}}(*element); }
template<typename T> inline bool is{{tag.interface}}(const PassRefPtr<T>& node) { return is{{tag.interface}}(node.get()); }
template<typename T> inline bool is{{tag.interface}}(const RefPtr<T>& node) { return is{{tag.interface}}(node.get()); }
inline bool is{{tag.interface}}(const Node& node) { return node.is{{namespace}}Element() && is{{tag.interface}}(to{{namespace}}Element(node)); }
inline bool is{{tag.interface}}(const Node* node) { return node && is{{tag.interface}}(*node); }
template <> inline bool isElementOfType<const {{tag.interface}}>(const Node& node) { return is{{tag.interface}}(node); }
template <> inline bool isElementOfType<const {{tag.interface}}>(const {{namespace}}Element& element) { return is{{tag.interface}}(element); }
{% endfilter %}

{% endfor %}
// Using macros because the types are forward-declared and we don't want to use reinterpret_cast in the
// casting functions above. reinterpret_cast would be unsafe due to multiple inheritence.

{% for tag in tags|sort if not tag.multipleTagNames and not tag.noTypeHelpers %}
{% filter enable_conditional(tag.Conditional) %}
#define to{{tag.interface}}(x) blink::toElement<blink::{{tag.interface}}>(x)
{% endfilter %}
{% endfor %}
} // namespace blink

#endif