Bug 617804 - Implement SetStatus in TabChild/TabParent, enables link tooltips. r=felipe

dom/ipc/PBrowser.ipdl

@@ -190,6 +190,12 @@ parent:
     SetCursor(uint32_t value);
     SetBackgroundColor(nscolor color);
 
+    /**
+     * Used to set the current text of the status tooltip.
+     * Nowadays this is mainly used for link locations on hover.
+     */
+    SetStatus(uint32_t type, nsString status);
+
     /**
      * Initiates an asynchronous request for permission for the
      * provided principal.

dom/ipc/TabChild.cpp

@@ -744,8 +744,10 @@ NS_IMPL_RELEASE(TabChild)
 NS_IMETHODIMP
 TabChild::SetStatus(uint32_t aStatusType, const PRUnichar* aStatus)
 {
-  // FIXME/bug 617804: should the platform support this?
-  return NS_OK;
+  return SetStatusWithContext(aStatusType,
+      aStatus ? static_cast<const nsString &>(nsDependentString(aStatus))
+              : EmptyString(),
+      nullptr);
 }
 
 NS_IMETHODIMP
@@ -820,10 +822,13 @@ TabChild::ExitModalEventLoop(nsresult aStatus)
 
 NS_IMETHODIMP
 TabChild::SetStatusWithContext(uint32_t aStatusType,
-                                    const nsAString& aStatusText,
-                                    nsISupports* aStatusContext)
+                               const nsAString& aStatusText,
+                               nsISupports* aStatusContext)
 {
-  // FIXME/bug 617804: should the platform support this?
+  // We can only send the status after the ipc machinery is set up,
+  // mRemoteFrame is a good indicator.
+  if (mRemoteFrame)
+    SendSetStatus(aStatusType, nsString(aStatusText));
   return NS_OK;
 }
 

dom/ipc/TabParent.cpp

@@ -41,6 +41,9 @@
 #include "nsIURI.h"
 #include "nsIMozBrowserFrame.h"
 #include "nsIScriptSecurityManager.h"
+#include "nsIWebBrowserChrome.h"
+#include "nsIXULBrowserWindow.h"
+#include "nsIXULWindow.h"
 #include "nsViewManager.h"
 #include "nsIWidget.h"
 #include "nsIWindowWatcher.h"
@@ -748,6 +751,42 @@ TabParent::RecvSetBackgroundColor(const nscolor& aColor)
   return true;
 }
 
+bool
+TabParent::RecvSetStatus(const uint32_t& aType, const nsString& aStatus)
+{
+  nsCOMPtr<nsIContent> frame = do_QueryInterface(mFrameElement);
+  if (frame) {
+    nsCOMPtr<nsISupports> container = frame->OwnerDoc()->GetContainer();
+    if (!container)
+      return true;
+    nsCOMPtr<nsIDocShell> docShell = do_QueryInterface(container);
+    if (!docShell)
+      return true;
+    nsCOMPtr<nsIDocShellTreeOwner> treeOwner;
+    docShell->GetTreeOwner(getter_AddRefs(treeOwner));
+    if (!treeOwner)
+      return true;
+
+    nsCOMPtr<nsIXULWindow> window = do_GetInterface(treeOwner);
+    if (window) {
+      nsCOMPtr<nsIXULBrowserWindow> xulBrowserWindow;
+      window->GetXULBrowserWindow(getter_AddRefs(xulBrowserWindow));
+      if (xulBrowserWindow) {
+        switch (aType)
+        {
+        case nsIWebBrowserChrome::STATUS_SCRIPT:
+          xulBrowserWindow->SetJSStatus(aStatus);
+          break;
+        case nsIWebBrowserChrome::STATUS_LINK:
+          xulBrowserWindow->SetOverLink(aStatus, nullptr);
+          break;
+        }
+      }
+    }
+  }
+  return true;
+}
+
 bool
 TabParent::RecvNotifyIMEFocus(const bool& aFocus,
                               nsIMEUpdatePreference* aPreference,

dom/ipc/TabParent.h

@@ -153,6 +153,7 @@ public:
                                      const int32_t& aFocusChange);
     virtual bool RecvSetCursor(const uint32_t& aValue);
     virtual bool RecvSetBackgroundColor(const nscolor& aValue);
+    virtual bool RecvSetStatus(const uint32_t& aType, const nsString& aStatus);
     virtual bool RecvGetDPI(float* aValue);
     virtual bool RecvGetDefaultScale(double* aValue);
     virtual bool RecvGetWidgetNativeData(WindowsHandle* aValue);