Add rust-alert to the tree and use it to allow a new URL to be navigated to

.gitmodules

@@ -85,3 +85,6 @@
 [submodule "src/compiler/rust"]
 	path = src/compiler/rust
 	url = https://github.com/mozilla/rust.git
+[submodule "src/support/alert/rust-alert"]
+	path = src/support/alert/rust-alert
+	url = git://github.com/mozilla-servo/rust-alert.git

configure

@@ -398,6 +398,7 @@ AUTOCMD="${LIBTOOLIZE} && autoconf && autoheader && automake --add-missing --cop
 # Copied from cairo's autogen.sh. Build fails without
 
 CFG_SUBMODULES="\
+    support/alert/rust-alert \
     support/azure/rust-azure \
     support/css/rust-css \
     support/geom/rust-geom \

mk/sub.mk

@@ -103,6 +103,11 @@ DEPS_rust-io-surface += \
 	rust-core-foundation \
 	$(NULL)
 
+DEPS_rust-alert += \
+	rust-core-foundation \
+	rust-cocoa \
+	$(NULL)
+
 DEPS_sharegl += \
 	rust-core-foundation \
 	rust-io-surface \

src/components/servo/platform/common/glut_windowing.rs

@@ -10,6 +10,7 @@
 use windowing::{ApplicationMethods, CompositeCallback, LoadUrlCallback, ResizeCallback};
 use windowing::{WindowMethods};
 
+use alert::{Alert, AlertMethods};
 use geom::size::Size2D;
 use glut::glut::{DOUBLE, WindowHeight, WindowWidth};
 use glut::glut;
@@ -116,7 +117,17 @@ impl Window {
     fn load_url(&self) {
         match self.load_url_callback {
             None => error!("no URL callback registered, doing nothing"),
-            Some(callback) => callback("http://purple.com/"),
+            Some(callback) => {
+                let mut alert: Alert = AlertMethods::new("Navigate to:");
+                alert.add_prompt();
+                alert.run();
+                let value = alert.prompt_value();
+                if "" == value {    // To avoid crashing on Linux.
+                    callback("http://purple.com/")
+                } else {
+                    callback(value)
+                }
+            }
         }
     }
 }

src/components/servo/servo.rc

@@ -11,6 +11,7 @@
 #[license = "MPL"];
 #[crate_type = "lib"];
 
+extern mod alert;
 extern mod azure;
 extern mod geom;
 extern mod gfx (name = "servo_gfx");

src/support/alert/rust-alert

@@ -0,0 +1 @@
+Subproject commit 0cba81aab4858442e9a995cf3b0149d0d116627c