[Windows] Add support for handling network share paths.

core/io/dir_access.cpp

@@ -145,14 +145,18 @@ Error DirAccess::make_dir_recursive(String p_dir) {
 
 	full_dir = full_dir.replace("\\", "/");
 
-	//int slices = full_dir.get_slice_count("/");
-
 	String base;
 
 	if (full_dir.begins_with("res://")) {
 		base = "res://";
 	} else if (full_dir.begins_with("user://")) {
 		base = "user://";
+	} else if (full_dir.is_network_share_path()) {
+		int pos = full_dir.find("/", 2);
+		ERR_FAIL_COND_V(pos < 0, ERR_INVALID_PARAMETER);
+		pos = full_dir.find("/", pos + 1);
+		ERR_FAIL_COND_V(pos < 0, ERR_INVALID_PARAMETER);
+		base = full_dir.substr(0, pos + 1);
 	} else if (full_dir.begins_with("/")) {
 		base = "/";
 	} else if (full_dir.find(":/") != -1) {

core/string/ustring.cpp

@@ -3558,6 +3558,10 @@ String String::rstrip(const String &p_chars) const {
 	return substr(0, end + 1);
 }
 
+bool String::is_network_share_path() const {
+	return begins_with("//") || begins_with("\\\\");
+}
+
 String String::simplify_path() const {
 	String s = *this;
 	String drive;
@@ -3570,6 +3574,9 @@ String String::simplify_path() const {
 	} else if (s.begins_with("user://")) {
 		drive = "user://";
 		s = s.substr(7, s.length());
+	} else if (is_network_share_path()) {
+		drive = s.substr(0, 2);
+		s = s.substr(2, s.length() - 2);
 	} else if (s.begins_with("/") || s.begins_with("\\")) {
 		drive = s.substr(0, 1);
 		s = s.substr(1, s.length() - 1);
@@ -4271,13 +4278,13 @@ bool String::is_relative_path() const {
 String String::get_base_dir() const {
 	int end = 0;
 
-	// url scheme style base
+	// URL scheme style base.
 	int basepos = find("://");
 	if (basepos != -1) {
 		end = basepos + 3;
 	}
 
-	// windows top level directory base
+	// Windows top level directory base.
 	if (end == 0) {
 		basepos = find(":/");
 		if (basepos == -1) {
@@ -4288,7 +4295,24 @@ String String::get_base_dir() const {
 		}
 	}
 
-	// unix root directory base
+	// Windows UNC network share path.
+	if (end == 0) {
+		if (is_network_share_path()) {
+			basepos = find("/", 2);
+			if (basepos == -1) {
+				basepos = find("\\", 2);
+			}
+			int servpos = find("/", basepos + 1);
+			if (servpos == -1) {
+				servpos = find("\\", basepos + 1);
+			}
+			if (servpos != -1) {
+				end = servpos + 1;
+			}
+		}
+	}
+
+	// Unix root directory base.
 	if (end == 0) {
 		if (begins_with("/")) {
 			end = 1;

core/string/ustring.h

@@ -405,6 +405,7 @@ public:
 	String get_file() const;
 	static String humanize_size(uint64_t p_size);
 	String simplify_path() const;
+	bool is_network_share_path() const;
 
 	String xml_escape(bool p_escape_quotes = false) const;
 	String xml_unescape() const;

drivers/windows/dir_access_windows.cpp

@@ -165,8 +165,11 @@ Error DirAccessWindows::make_dir(String p_dir) {
 	bool success;
 	int err;
 
-	p_dir = "\\\\?\\" + p_dir; //done according to
+	if (!p_dir.is_network_share_path()) {
-	// https://msdn.microsoft.com/en-us/library/windows/desktop/aa363855(v=vs.85).aspx
+		p_dir = "\\\\?\\" + p_dir;
+		// Add "\\?\" to the path to extend max. path length past 248, if it's not a network share UNC path.
+		// See https://msdn.microsoft.com/en-us/library/windows/desktop/aa363855(v=vs.85).aspx
+	}
 
 	success = CreateDirectoryW((LPCWSTR)(p_dir.utf16().get_data()), nullptr);
 	err = GetLastError();
@@ -349,6 +352,10 @@ String DirAccessWindows::get_filesystem_type() const {
 	ERR_FAIL_COND_V(unit_end == -1, String());
 	String unit = path.substr(0, unit_end + 1) + "\\";
 
+	if (path.is_network_share_path()) {
+		return "Network Share";
+	}
+
 	WCHAR szVolumeName[100];
 	WCHAR szFileSystemName[10];
 	DWORD dwSerialNumber = 0;

editor/editor_file_dialog.cpp

@@ -230,7 +230,14 @@ Vector<String> EditorFileDialog::get_selected_files() const {
 
 void EditorFileDialog::update_dir() {
 	if (drives->is_visible()) {
-		drives->select(dir_access->get_current_drive());
+		if (dir_access->get_current_dir().is_network_share_path()) {
+			_update_drives(false);
+			drives->add_item(RTR("Network"));
+			drives->set_item_disabled(drives->get_item_count() - 1, true);
+			drives->select(drives->get_item_count() - 1);
+		} else {
+			drives->select(dir_access->get_current_drive());
+		}
 	}
 	dir->set_text(dir_access->get_current_dir(false));
 
@@ -1152,7 +1159,7 @@ void EditorFileDialog::_select_drive(int p_idx) {
 	_push_history();
 }
 
-void EditorFileDialog::_update_drives() {
+void EditorFileDialog::_update_drives(bool p_select) {
 	int dc = dir_access->get_drive_count();
 	if (dc == 0 || access != ACCESS_FILESYSTEM) {
 		drives->hide();
@@ -1170,8 +1177,9 @@ void EditorFileDialog::_update_drives() {
 			String d = dir_access->get_drive(i);
 			drives->add_item(dir_access->get_drive(i));
 		}
-
+		if (p_select) {
-		drives->select(dir_access->get_current_drive());
+			drives->select(dir_access->get_current_drive());
+		}
 	}
 }
 

editor/editor_file_dialog.h

@@ -180,7 +180,7 @@ private:
 
 	void _delete_items();
 
-	void _update_drives();
+	void _update_drives(bool p_select = true);
 
 	void _go_up();
 	void _go_back();

scene/gui/file_dialog.cpp

@@ -169,7 +169,14 @@ void FileDialog::update_dir() {
 	dir->set_text(dir_access->get_current_dir(false));
 
 	if (drives->is_visible()) {
-		drives->select(dir_access->get_current_drive());
+		if (dir_access->get_current_dir().is_network_share_path()) {
+			_update_drives(false);
+			drives->add_item(RTR("Network"));
+			drives->set_item_disabled(drives->get_item_count() - 1, true);
+			drives->select(drives->get_item_count() - 1);
+		} else {
+			drives->select(dir_access->get_current_drive());
+		}
 	}
 
 	// Deselect any item, to make "Select Current Folder" button text by default.
@@ -846,7 +853,7 @@ void FileDialog::_select_drive(int p_idx) {
 	_push_history();
 }
 
-void FileDialog::_update_drives() {
+void FileDialog::_update_drives(bool p_select) {
 	int dc = dir_access->get_drive_count();
 	if (dc == 0 || access != ACCESS_FILESYSTEM) {
 		drives->hide();
@@ -864,7 +871,9 @@ void FileDialog::_update_drives() {
 			drives->add_item(dir_access->get_drive(i));
 		}
 
-		drives->select(dir_access->get_current_drive());
+		if (p_select) {
+			drives->select(dir_access->get_current_drive());
+		}
 	}
 }
 

scene/gui/file_dialog.h

@@ -132,7 +132,7 @@ private:
 	void _go_back();
 	void _go_forward();
 
-	void _update_drives();
+	void _update_drives(bool p_select = true);
 
 	virtual void unhandled_input(const Ref<InputEvent> &p_event) override;