4 files changed, 44 insertions, 8 deletions

diff --git a/scene/main/http_request.cpp b/scene/main/http_request.cpp
index e21e47f8a8..6c922adbd2 100644
--- a/scene/main/http_request.cpp
+++ b/scene/main/http_request.cpp
@@ -60,10 +60,10 @@ Error HTTPRequest::_parse_url(const String &p_url) {
 		use_ssl = true;
 		port = 443;
 	} else {
-		ERR_FAIL_V_MSG(ERR_INVALID_PARAMETER, "Malformed URL.");
+		ERR_FAIL_V_MSG(ERR_INVALID_PARAMETER, "Malformed URL: " + url + ".");
 	}
 
-	ERR_FAIL_COND_V_MSG(url.length() < 1, ERR_INVALID_PARAMETER, "URL too short.");
+	ERR_FAIL_COND_V_MSG(url.length() < 1, ERR_INVALID_PARAMETER, "URL too short: " + url + ".");
 
 	int slash_pos = url.find("/");
 
diff --git a/scene/main/scene_tree.cpp b/scene/main/scene_tree.cpp
index 617a703855..6c89016ea3 100644
--- a/scene/main/scene_tree.cpp
+++ b/scene/main/scene_tree.cpp
@@ -33,6 +33,7 @@
 #include "core/io/marshalls.h"
 #include "core/io/resource_loader.h"
 #include "core/message_queue.h"
+#include "core/os/dir_access.h"
 #include "core/os/keyboard.h"
 #include "core/os/os.h"
 #include "core/print_string.h"
@@ -1953,6 +1954,38 @@ bool SceneTree::is_using_font_oversampling() const {
 	return use_font_oversampling;
 }
 
+void SceneTree::get_argument_options(const StringName &p_function, int p_idx, List<String> *r_options) const {
+
+	if (p_function == "change_scene") {
+		DirAccessRef dir_access = DirAccess::create(DirAccess::ACCESS_RESOURCES);
+		List<String> directories;
+		directories.push_back(dir_access->get_current_dir());
+
+		while (!directories.empty()) {
+			dir_access->change_dir(directories.back()->get());
+			directories.pop_back();
+
+			dir_access->list_dir_begin();
+			String filename = dir_access->get_next();
+
+			while (filename != "") {
+				if (filename == "." || filename == "..") {
+					filename = dir_access->get_next();
+					continue;
+				}
+
+				if (dir_access->dir_exists(filename)) {
+					directories.push_back(dir_access->get_current_dir().plus_file(filename));
+				} else if (filename.ends_with(".tscn") || filename.ends_with(".scn")) {
+					r_options->push_back("\"" + dir_access->get_current_dir().plus_file(filename) + "\"");
+				}
+
+				filename = dir_access->get_next();
+			}
+		}
+	}
+}
+
 SceneTree::SceneTree() {
 
 	if (singleton == NULL) singleton = this;
diff --git a/scene/main/scene_tree.h b/scene/main/scene_tree.h
index 42a87545a6..d387886d61 100644
--- a/scene/main/scene_tree.h
+++ b/scene/main/scene_tree.h
@@ -408,6 +408,7 @@ public:
 
 	void drop_files(const Vector<String> &p_files, int p_from_screen = 0);
 	void global_menu_action(const Variant &p_id, const Variant &p_meta);
+	void get_argument_options(const StringName &p_function, int p_idx, List<String> *r_options) const;
 
 	//network API
 
diff --git a/scene/main/viewport.cpp b/scene/main/viewport.cpp
index 93eea2ad0b..b5c82ce4e3 100644
--- a/scene/main/viewport.cpp
+++ b/scene/main/viewport.cpp
@@ -2289,32 +2289,34 @@ void Viewport::_gui_input_event(Ref<InputEvent> p_event) {
 		if (from && p_event->is_pressed()) {
 			Control *next = NULL;
 
-			if (p_event->is_action_pressed("ui_focus_next")) {
+			Input *input = Input::get_singleton();
+
+			if (p_event->is_action_pressed("ui_focus_next") && input->is_action_just_pressed("ui_focus_next")) {
 
 				next = from->find_next_valid_focus();
 			}
 
-			if (p_event->is_action_pressed("ui_focus_prev")) {
+			if (p_event->is_action_pressed("ui_focus_prev") && input->is_action_just_pressed("ui_focus_prev")) {
 
 				next = from->find_prev_valid_focus();
 			}
 
-			if (!mods && p_event->is_action_pressed("ui_up")) {
+			if (!mods && p_event->is_action_pressed("ui_up") && input->is_action_just_pressed("ui_up")) {
 
 				next = from->_get_focus_neighbour(MARGIN_TOP);
 			}
 
-			if (!mods && p_event->is_action_pressed("ui_left")) {
+			if (!mods && p_event->is_action_pressed("ui_left") && input->is_action_just_pressed("ui_left")) {
 
 				next = from->_get_focus_neighbour(MARGIN_LEFT);
 			}
 
-			if (!mods && p_event->is_action_pressed("ui_right")) {
+			if (!mods && p_event->is_action_pressed("ui_right") && input->is_action_just_pressed("ui_right")) {
 
 				next = from->_get_focus_neighbour(MARGIN_RIGHT);
 			}
 
-			if (!mods && p_event->is_action_pressed("ui_down")) {
+			if (!mods && p_event->is_action_pressed("ui_down") && input->is_action_just_pressed("ui_down")) {
 
 				next = from->_get_focus_neighbour(MARGIN_BOTTOM);
 			}