[PATCH 03/10] mshtml: Send load event synchronously for image elements if set to same src.

[Gabriel Ivăncescu]

From: Gabriel Ivăncescu

Otherwise, script56.chm's javascript will keep reloading the image and
triggering onload events non-stop. It protects against this using a variable
"noReentry", which is only set temporarily while setting the source, so it
expects it to be triggered synchronously.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=53927
Signed-off-by: Gabriel Ivăncescu 
---
 dlls/mshtml/htmlimg.c      | 25 +++++++++++++++++++++++++
 dlls/mshtml/tests/events.c | 15 ++++++++++++++-
 2 files changed, 39 insertions(+), 1 deletion(-)

diff --git a/dlls/mshtml/htmlimg.c b/dlls/mshtml/htmlimg.c
index e779dd2dec7..e4898e081e9 100644
--- a/dlls/mshtml/htmlimg.c
+++ b/dlls/mshtml/htmlimg.c
@@ -283,9 +283,34 @@ static HRESULT WINAPI HTMLImgElement_put_src(IHTMLImgElement *iface, BSTR v)
     HTMLImg *This = impl_from_IHTMLImgElement(iface);
     nsAString src_str;
     nsresult nsres;
+    HRESULT hres;

TRACE("(%p)->(%s)\n", This, debugstr_w(v));

+    nsAString_Init(&src_str, NULL);
+    nsres = nsIDOMHTMLImageElement_GetSrc(This->nsimg, &src_str);
+    if(NS_SUCCEEDED(nsres)) {
+        const PRUnichar *src;
+        DOMEvent *event;
+        VARIANT_BOOL b;
+        BOOL same;
+
+        nsAString_GetData(&src_str, &src);
+        same = !wcscmp(v, src);
+        nsAString_Finish(&src_str);
+        if(same) {
+            hres = IHTMLImgElement_get_complete(&This->IHTMLImgElement_iface, &b);
+            if(SUCCEEDED(hres) && b) {
+                hres = create_document_event(This->element.node.doc, EVENTID_LOAD, &event);
+                if(SUCCEEDED(hres)) {
+                    dispatch_event(&This->element.node.event_target, event);
+                    IDOMEvent_Release(&event->IDOMEvent_iface);
+                }
+                return hres;
+            }
+        }
+    }
+
     nsAString_InitDepend(&src_str, v);
     nsres = nsIDOMHTMLImageElement_SetSrc(This->nsimg, &src_str);
     nsAString_Finish(&src_str);
diff --git a/dlls/mshtml/tests/events.c b/dlls/mshtml/tests/events.c
index 643993bc475..c3223eca1d2 100644
--- a/dlls/mshtml/tests/events.c
+++ b/dlls/mshtml/tests/events.c
@@ -2251,6 +2251,7 @@ static void test_imgload(IHTMLDocument2 *doc)
 {
     IHTMLImgElement *img;
     IHTMLElement *elem;
+    VARIANT_BOOL b;
     VARIANT v;
     BSTR str;
     HRESULT hres;
@@ -2292,12 +2293,24 @@ static void test_imgload(IHTMLDocument2 *doc)
     str = SysAllocString(L"http://test.winehq.org/tests/winehq_snapshot/index_files/winehq_logo_text.pn...");
     hres = IHTMLImgElement_put_src(img, str);
     ok(hres == S_OK, "put_src failed: %08lx\n", hres);
-    SysFreeString(str);

SET_EXPECT(img_onload);
     pump_msgs(&called_img_onload);
     CHECK_CALLED(img_onload);

+    hres = IHTMLImgElement_get_complete(img, &b);
+    ok(hres == S_OK, "get_complete failed: %08lx\n", hres);
+    ok(b == VARIANT_TRUE, "complete = %x\n", b);
+
+    /* same src sends synchronous load event */
+    SET_EXPECT(img_onload);
+    hres = IHTMLImgElement_put_src(img, str);
+    ok(hres == S_OK, "put_src failed: %08lx\n", hres);
+    CHECK_CALLED(img_onload);
+    SysFreeString(str);
+
+    pump_msgs(NULL);
+
     SET_EXPECT(img_onerror);

str = SysAllocString(L"about:blank");