Piotr Caban : mshtml: Add IElementTraversal:: get_firstElementChild implementation.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 3c7415f715108d30164e280e08a4683f974e5034
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=3c7415f715108d30164e280e08a4683f974e5034

Author: Piotr Caban <piotr at codeweavers.com>
Date:   Tue Jul 25 17:57:20 2017 +0200

mshtml: Add IElementTraversal::get_firstElementChild implementation.

Signed-off-by: Piotr Caban <piotr at codeweavers.com>
Signed-off-by: Jacek Caban <jacek at codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>

---

 dlls/mshtml/htmlelem.c        | 21 +++++++++++++++++++--
 dlls/mshtml/tests/elements.js | 17 ++++++++++++++++-
 2 files changed, 35 insertions(+), 3 deletions(-)

diff --git a/dlls/mshtml/htmlelem.c b/dlls/mshtml/htmlelem.c
index ae31d1d..927541b 100644
--- a/dlls/mshtml/htmlelem.c
+++ b/dlls/mshtml/htmlelem.c
@@ -4953,8 +4953,25 @@ static HRESULT WINAPI ElementTraversal_Invoke(IElementTraversal *iface, DISPID d
 static HRESULT WINAPI ElementTraversal_get_firstElementChild(IElementTraversal *iface, IHTMLElement **p)
 {
     HTMLElement *This = impl_from_IElementTraversal(iface);
-    FIXME("(%p)->(%p)\n", This, p);
-    return E_NOTIMPL;
+    nsIDOMElement *nselem = NULL;
+    HTMLElement *elem;
+    HRESULT hres;
+
+    TRACE("(%p)->(%p)\n", This, p);
+
+    nsIDOMHTMLElement_GetFirstElementChild(This->nselem, &nselem);
+    if(!nselem) {
+        *p = NULL;
+        return S_OK;
+    }
+
+    hres = get_elem(This->node.doc, nselem, &elem);
+    nsIDOMElement_Release(nselem);
+    if(FAILED(hres))
+        return hres;
+
+    *p = &elem->IHTMLElement_iface;
+    return S_OK;
 }
 
 static HRESULT WINAPI ElementTraversal_get_lastElementChild(IElementTraversal *iface, IHTMLElement **p)
diff --git a/dlls/mshtml/tests/elements.js b/dlls/mshtml/tests/elements.js
index 4167e32..b7db0bc 100644
--- a/dlls/mshtml/tests/elements.js
+++ b/dlls/mshtml/tests/elements.js
@@ -80,7 +80,22 @@ function test_textContent() {
     next_test();
 }
 
+function test_ElementTraversal() {
+    var div = document.createElement("div");
+    div.innerHTML = "abc<b>bold</b><script>/* */<script><div>text</div>def";
+    ok(div.firstElementChild.outerHTML === "<b>bold</b>",
+            "div.firstElementChild.outerHTML = " + div.firstElementChild.outerHTML);
+
+    div.innerHTML = "abc";
+    ok(div.firstElementChild === null, "div.firstElementChild = " + div.firstElementChild);
+
+    ok(!("firstElementChild" in document), "firstElementChild found in document");
+
+    next_test();
+}
+
 var tests = [
     test_input_selection,
-    test_textContent
+    test_textContent,
+    test_ElementTraversal
 ];