From cedfbbce5ee148d04cfa87c3e459eea26ba397ef Mon Sep 17 00:00:00 2001
From: Michael Drake <michael.drake@codethink.co.uk>
Date: Thu, 28 Jan 2016 17:13:28 +0000
Subject: Add function to get html element's tag type.

---
 Makefile                        |  1 +
 include/dom/html/html_element.h | 18 ++++++++++++++++++
 src/html/html_element.c         | 18 ++++++++++++++++++
 src/html/html_element.h         |  5 ++++-
 4 files changed, 41 insertions(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index ddbdbd2..d287455 100644
--- a/Makefile
+++ b/Makefile
@@ -90,6 +90,7 @@ I := /$(INCLUDEDIR)/dom/html
 INSTALL_ITEMS := $(INSTALL_ITEMS) $(I):$(Is)/html_document.h
 INSTALL_ITEMS := $(INSTALL_ITEMS) $(I):$(Is)/html_collection.h
 INSTALL_ITEMS := $(INSTALL_ITEMS) $(I):$(Is)/html_element.h
+INSTALL_ITEMS := $(INSTALL_ITEMS) $(I):$(Is)/html_elements.h
 INSTALL_ITEMS := $(INSTALL_ITEMS) $(I):$(Is)/html_html_element.h
 INSTALL_ITEMS := $(INSTALL_ITEMS) $(I):$(Is)/html_head_element.h
 INSTALL_ITEMS := $(INSTALL_ITEMS) $(I):$(Is)/html_link_element.h
diff --git a/include/dom/html/html_element.h b/include/dom/html/html_element.h
index dc1def1..49a7d59 100644
--- a/include/dom/html/html_element.h
+++ b/include/dom/html/html_element.h
@@ -9,6 +9,7 @@
 #define dom_html_element_h_
 
 #include <dom/core/element.h>
+#include <dom/html/html_elements.h>
 
 typedef struct dom_html_element dom_html_element;
 
@@ -45,6 +46,12 @@ typedef struct dom_html_element_vtable {
 	dom_exception (*dom_html_element_set_class_name)(
 			struct dom_html_element *element,
 			dom_string *class_name);
+
+	/* This is for providing clients with a convienent way to deal
+	 * with html elements with a specific tag name. */
+	dom_exception (*dom_html_element_get_tag_type)(
+			const struct dom_html_element *element,
+			dom_html_element_type *type);
 } dom_html_element_vtable;
 
 static inline dom_exception dom_html_element_get_id(
@@ -139,5 +146,16 @@ static inline dom_exception dom_html_element_set_class_name(
 		dom_html_element_set_class_name((dom_html_element *) (e), \
 		(class_name))
 
+static inline dom_exception dom_html_element_get_tag_type(
+		const struct dom_html_element *element,
+		dom_html_element_type *type)
+{
+	return ((dom_html_element_vtable *) ((dom_node *) element)->vtable)->
+		dom_html_element_get_tag_type(element, type);
+}
+#define dom_html_element_get_tag_type(e, type) \
+		dom_html_element_get_tag_type((const dom_html_element *) (e), \
+		(type))
+
 #endif
 
diff --git a/src/html/html_element.c b/src/html/html_element.c
index 39aabda..85380ff 100644
--- a/src/html/html_element.c
+++ b/src/html/html_element.c
@@ -282,6 +282,24 @@ dom_exception _dom_html_element_get_elements_by_tag_name_ns(
 	return err;
 }
 
+/**
+ * Retrieve an HTML element's tag type.
+ *
+ * \param element  The element to get the tag type of.
+ * \param type     Updated to the tag type of the element.
+ * \return DOM_NO_ERR
+ *
+ * Elements with non-standard tags will be DOM_HTML_ELEMENT_TYPE__UNKNOWN.
+ */
+dom_exception _dom_html_element_get_tag_type(
+		const struct dom_html_element *element,
+		dom_html_element_type *type)
+{
+	*type = element->type;
+
+	return DOM_NO_ERR;
+}
+
 /*-----------------------------------------------------------------------*/
 /* Common functions */
 
diff --git a/src/html/html_element.h b/src/html/html_element.h
index 7d86727..92c96ab 100644
--- a/src/html/html_element.h
+++ b/src/html/html_element.h
@@ -124,6 +124,8 @@ dom_exception _dom_html_element_get_class_name(dom_html_element *element,
                                        dom_string **class_name);
 dom_exception _dom_html_element_set_class_name(dom_html_element *element,
                                        dom_string *class_name);
+dom_exception _dom_html_element_get_tag_type(const dom_html_element *element,
+                                       dom_html_element_type *type);
 
 #define DOM_HTML_ELEMENT_VTABLE \
 	_dom_html_element_get_id, \
@@ -135,7 +137,8 @@ dom_exception _dom_html_element_set_class_name(dom_html_element *element,
 	_dom_html_element_get_dir, \
 	_dom_html_element_set_dir, \
 	_dom_html_element_get_class_name, \
-	_dom_html_element_set_class_name
+	_dom_html_element_set_class_name, \
+	_dom_html_element_get_tag_type
 
 /* Some common functions used by all child classes */
 dom_exception dom_html_element_get_bool_property(dom_html_element *ele,
-- 
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