r3577 jmb - /trunk/dom/src/core/element.c
by netsurf＠semichrome.net
Author: jmb
Date: Sun Sep 23 00:39:58 2007
New Revision: 3577
URL: http://source.netsurf-browser.org?rev=3577&view=rev
Log:
Implement dom_element_get_attribute()
Implement dom_element_set_attribute()
Implement dom_element_remove_attribute()
Implement dom_element_get_attribute_node()
Make dom_element_set_attribute_node() ensure that the element is writable
Implement dom_element_remove_attribute_node()
Implement dom_element_get_elements_by_tag_name()
Implement dom_element_get_elements_by_tag_name_ns()
Implement dom_element_has_attribute()
Modified:
trunk/dom/src/core/element.c
Modified: trunk/dom/src/core/element.c
URL: http://source.netsurf-browser.org/trunk/dom/src/core/element.c?rev=3577&r...
==============================================================================
--- trunk/dom/src/core/element.c (original)
+++ trunk/dom/src/core/element.c Sun Sep 23 00:39:58 2007
@@ -7,9 +7,11 @@
#include <stdio.h>
+#include <dom/core/attr.h>
#include <dom/core/element.h>
#include <dom/core/string.h>
+#include "core/attr.h"
#include "core/document.h"
#include "core/element.h"
#include "core/node.h"
@@ -203,11 +205,22 @@
dom_exception dom_element_get_attribute(struct dom_element *element,
struct dom_string *name, struct dom_string **value)
{
- UNUSED(element);
- UNUSED(name);
- UNUSED(value);
-
- return DOM_NOT_SUPPORTED_ERR;
+ struct dom_node *a = (struct dom_node *) element->base.attributes;
+
+ /* Search attributes, looking for name */
+ for (; a != NULL; a = a->next) {
+ if (dom_string_cmp(a->name, name) == 0)
+ break;
+ }
+
+ /* Fill in value */
+ if (a == NULL) {
+ *value = NULL;
+ } else {
+ dom_attr_get_value(((struct dom_attr *) a), value);
+ }
+
+ return DOM_NO_ERR;
}
/**
@@ -223,11 +236,58 @@
dom_exception dom_element_set_attribute(struct dom_element *element,
struct dom_string *name, struct dom_string *value)
{
- UNUSED(element);
- UNUSED(name);
- UNUSED(value);
-
- return DOM_NOT_SUPPORTED_ERR;
+ struct dom_node *e = (struct dom_node *) element;
+ struct dom_node *a = (struct dom_node *) e->attributes;
+
+ /** \todo validate name */
+
+ /* Ensure element can be written to */
+ if (_dom_node_readonly(e))
+ return DOM_NO_MODIFICATION_ALLOWED_ERR;
+
+ /* Search for existing attribute with same name */
+ for (; a != NULL; a = a->next) {
+ if (dom_string_cmp(a->name, name) == 0)
+ break;
+ }
+
+ if (a != NULL) {
+ /* Found an existing attribute, so replace its value */
+ if (a->value != NULL)
+ dom_string_unref(a->value);
+
+ if (value != NULL)
+ dom_string_ref(value);
+ a->value = value;
+ } else {
+ /* No existing attribute, so create one */
+ dom_exception err;
+ struct dom_attr *attr;
+
+ err = dom_attr_create(e->owner, name, &attr);
+ if (err != DOM_NO_ERR)
+ return err;
+
+ /* Set its value */
+ err = dom_attr_set_value(attr, value);
+ if (err != DOM_NO_ERR) {
+ dom_node_unref((struct dom_node *) attr);
+ return err;
+ }
+
+ a = (struct dom_node *) attr;
+
+ /* And insert it into the element */
+ a->previous = NULL;
+ a->next = (struct dom_node *) e->attributes;
+
+ if (a->next != NULL)
+ a->next->previous = a;
+
+ e->attributes = attr;
+ }
+
+ return DOM_NO_ERR;
}
/**
@@ -241,10 +301,36 @@
dom_exception dom_element_remove_attribute(struct dom_element *element,
struct dom_string *name)
{
- UNUSED(element);
- UNUSED(name);
-
- return DOM_NOT_SUPPORTED_ERR;
+ struct dom_node *e = (struct dom_node *) element;
+ struct dom_node *a = (struct dom_node *) e->attributes;
+
+ /* Ensure element can be written to */
+ if (_dom_node_readonly(e))
+ return DOM_NO_MODIFICATION_ALLOWED_ERR;
+
+ /* Search for existing attribute with same name */
+ for (; a != NULL; a = a->next) {
+ if (dom_string_cmp(a->name, name) == 0)
+ break;
+ }
+
+ /* Detach attr node from list */
+ if (a != NULL) {
+ if (a->previous != NULL)
+ a->previous->next = a->next;
+ else
+ e->attributes = (struct dom_attr *) a->next;
+
+ if (a->next != NULL)
+ a->next->previous = a->previous;
+
+ a->previous = a->next = a->parent = NULL;
+
+ /* And destroy attr */
+ dom_node_unref(a);
+ }
+
+ return DOM_NO_ERR;
}
/**
@@ -262,11 +348,19 @@
dom_exception dom_element_get_attribute_node(struct dom_element *element,
struct dom_string *name, struct dom_attr **result)
{
- UNUSED(element);
- UNUSED(name);
- UNUSED(result);
-
- return DOM_NOT_SUPPORTED_ERR;
+ struct dom_node *a = (struct dom_node *) element->base.attributes;
+
+ /* Search attributes, looking for name */
+ for (; a != NULL; a = a->next) {
+ if (dom_string_cmp(a->name, name) == 0)
+ break;
+ }
+
+ if (a != NULL)
+ dom_node_ref(a);
+ *result = (struct dom_attr *) a;
+
+ return DOM_NO_ERR;
}
/**
@@ -297,7 +391,9 @@
if (e->owner != a->owner)
return DOM_WRONG_DOCUMENT_ERR;
- /** \todo ensure ::element can be written to */
+ /* Ensure element can be written to */
+ if (_dom_node_readonly(e))
+ return DOM_NO_MODIFICATION_ALLOWED_ERR;
/* Ensure attribute isn't attached to another element */
if (a->parent != NULL && a->parent != e)
@@ -359,7 +455,7 @@
}
/**
- * Remove an attribute node from an element by name
+ * Remove an attribute node from an element
*
* \param element The element to remove attribute node from
* \param attr The attribute node to remove
@@ -376,11 +472,33 @@
dom_exception dom_element_remove_attribute_node(struct dom_element *element,
struct dom_attr *attr, struct dom_attr **result)
{
- UNUSED(element);
- UNUSED(attr);
- UNUSED(result);
-
- return DOM_NOT_SUPPORTED_ERR;
+ struct dom_node *e = (struct dom_node *) element;
+ struct dom_node *a = (struct dom_node *) attr;
+
+ /* Ensure element can be written to */
+ if (_dom_node_readonly(e))
+ return DOM_NO_MODIFICATION_ALLOWED_ERR;
+
+ /* Ensure attr is an attribute of element */
+ if (a->parent != e)
+ return DOM_NOT_FOUND_ERR;
+
+ /* Detach attr node from list */
+ if (a->previous != NULL)
+ a->previous->next = a->next;
+ else
+ e->attributes = (struct dom_attr *) a->next;
+
+ if (a->next != NULL)
+ a->next->previous = a->previous;
+
+ a->previous = a->next = a->parent = NULL;
+
+ /* Return the detached node */
+ dom_node_ref(a);
+ *result = attr;
+
+ return DOM_NO_ERR;
}
/**
@@ -400,11 +518,8 @@
struct dom_element *element, struct dom_string *name,
struct dom_nodelist **result)
{
- UNUSED(element);
- UNUSED(name);
- UNUSED(result);
-
- return DOM_NOT_SUPPORTED_ERR;
+ return dom_document_get_nodelist(element->base.owner,
+ (struct dom_node *) element, name, NULL, NULL, result);
}
/**
@@ -584,12 +699,9 @@
struct dom_element *element, struct dom_string *namespace,
struct dom_string *localname, struct dom_nodelist **result)
{
- UNUSED(element);
- UNUSED(namespace);
- UNUSED(localname);
- UNUSED(result);
-
- return DOM_NOT_SUPPORTED_ERR;
+ return dom_document_get_nodelist(element->base.owner,
+ (struct dom_node *) element, NULL,
+ namespace, localname, result);
}
/**
@@ -603,11 +715,17 @@
dom_exception dom_element_has_attribute(struct dom_element *element,
struct dom_string *name, bool *result)
{
- UNUSED(element);
- UNUSED(name);
- UNUSED(result);
-
- return DOM_NOT_SUPPORTED_ERR;
+ struct dom_node *a = (struct dom_node *) element->base.attributes;
+
+ /* Search attributes, looking for name */
+ for (; a != NULL; a = a->next) {
+ if (dom_string_cmp(a->name, name) == 0)
+ break;
+ }
+
+ *result = (a != NULL);
+
+ return DOM_NO_ERR;
}
/**
