ieframe: Update back/forward command state in FireNavigateComplete2.

dlls/ieframe/dochost.c

@@ -80,6 +80,35 @@ void abort_dochost_tasks(DocHost *This, task_proc_t proc)
     }
 }
 
+void on_commandstate_change(DocHost *doc_host, LONG command, VARIANT_BOOL enable)
+{
+    DISPPARAMS dispparams;
+    VARIANTARG params[2];
+
+    TRACE("command=%d enable=%d\n", command, enable);
+
+    dispparams.cArgs = 2;
+    dispparams.cNamedArgs = 0;
+    dispparams.rgdispidNamedArgs = NULL;
+    dispparams.rgvarg = params;
+
+    V_VT(params) = VT_BOOL;
+    V_BOOL(params) = enable;
+
+    V_VT(params+1) = VT_I4;
+    V_I4(params+1) = command;
+
+    call_sink(doc_host->cps.wbe2, DISPID_COMMANDSTATECHANGE, &dispparams);
+}
+
+void update_navigation_commands(DocHost *dochost)
+{
+    unsigned pos = dochost->travellog.loading_pos == -1 ? dochost->travellog.position : dochost->travellog.loading_pos;
+
+    on_commandstate_change(dochost, CSC_NAVIGATEBACK, pos > 0 ? VARIANT_TRUE : VARIANT_FALSE);
+    on_commandstate_change(dochost, CSC_NAVIGATEFORWARD, pos < dochost->travellog.length ? VARIANT_TRUE : VARIANT_FALSE);
+}
+
 static void notif_complete(DocHost *This, DISPID dispid)
 {
     DISPPARAMS dispparams;

dlls/ieframe/ieframe.h

@@ -278,6 +278,7 @@ void deactivate_document(DocHost*) DECLSPEC_HIDDEN;
 void create_doc_view_hwnd(DocHost*) DECLSPEC_HIDDEN;
 void on_commandstate_change(DocHost*,LONG,VARIANT_BOOL) DECLSPEC_HIDDEN;
 void notify_download_state(DocHost*,BOOL) DECLSPEC_HIDDEN;
+void update_navigation_commands(DocHost *dochost) DECLSPEC_HIDDEN;
 
 #define WM_DOCHOSTTASK (WM_USER+0x300)
 void push_dochost_task(DocHost*,task_header_t*,task_proc_t,task_destr_t,BOOL) DECLSPEC_HIDDEN;

dlls/ieframe/navigate.c

@@ -781,27 +781,6 @@ static void doc_navigate_task_destr(task_header_t *t)
     heap_free(task);
 }
 
-void on_commandstate_change(DocHost *doc_host, LONG command, VARIANT_BOOL enable)
-{
-    DISPPARAMS dispparams;
-    VARIANTARG params[2];
-
-    TRACE("command=%d enable=%d\n", command, enable);
-
-    dispparams.cArgs = 2;
-    dispparams.cNamedArgs = 0;
-    dispparams.rgdispidNamedArgs = NULL;
-    dispparams.rgvarg = params;
-
-    V_VT(params) = VT_BOOL;
-    V_BOOL(params) = enable;
-
-    V_VT(params+1) = VT_I4;
-    V_I4(params+1) = command;
-
-    call_sink(doc_host->cps.wbe2, DISPID_COMMANDSTATECHANGE, &dispparams);
-}
-
 static void doc_navigate_proc(DocHost *This, task_header_t *t)
 {
     task_doc_navigate_t *task = (task_doc_navigate_t*)t;

dlls/ieframe/shellbrowser.c

@@ -748,6 +748,8 @@ static HRESULT WINAPI DocObjectService_FireNavigateComplete2(
 
     TRACE("%p %p %x\n", This, pHTMLWindow2, dwFlags);
 
+    update_navigation_commands(This->doc_host);
+
     if(doc_host->travellog.loading_pos != -1) {
         WARN("histupdate not notified\n");
         doc_host->travellog.position = doc_host->travellog.loading_pos;