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LibHTML: Add is<ElementType> and to<ElementType> helper functions

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These will help us write node-type-aware template functions.
This commit is contained in:
Andreas Kling 2019-10-06 20:37:39 +02:00
parent bedb00603c
commit f52f2736e1
12 changed files with 93 additions and 22 deletions
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20
Libraries/LibHTML/Dump.cpp
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@ -14,19 +14,19 @@ void dump_tree(const Node& node)
static int indent = 0;
for (int i = 0; i < indent; ++i)
dbgprintf(" ");
if (node.is_document()) {
if (is<Document>(node)) {
dbgprintf("*Document*\n");
} else if (node.is_element()) {
dbgprintf("<%s", static_cast<const Element&>(node).tag_name().characters());
static_cast<const Element&>(node).for_each_attribute([](auto& name, auto& value) {
} else if (is<Element>(node)) {
dbgprintf("<%s", to<Element>(node).tag_name().characters());
to<Element>(node).for_each_attribute([](auto& name, auto& value) {
dbgprintf(" %s=%s", name.characters(), value.characters());
});
dbgprintf(">\n");
} else if (node.is_text()) {
} else if (is<Text>(node)) {
dbgprintf("\"%s\"\n", static_cast<const Text&>(node).data().characters());
}
++indent;
if (node.is_parent_node()) {
if (is<ParentNode>(node)) {
static_cast<const ParentNode&>(node).for_each_child([](auto& child) {
dump_tree(child);
});
@ -43,12 +43,12 @@ void dump_tree(const LayoutNode& layout_node)
String tag_name;
if (layout_node.is_anonymous())
tag_name = "(anonymous)";
else if (layout_node.node()->is_text())
else if (is<Text>(layout_node.node()))
tag_name = "#text";
else if (layout_node.node()->is_document())
else if (is<Document>(layout_node.node()))
tag_name = "#document";
else if (layout_node.node()->is_element())
tag_name = static_cast<const Element&>(*layout_node.node()).tag_name();
else if (is<Element>(layout_node.node()))
tag_name = to<Element>(*layout_node.node()).tag_name();
else
tag_name = "???";