Parser skeleton

Expanded drawing interface

svn-id: r32678

1 files changed, 111 insertions, 0 deletions

diff --git a/gui/ThemeParser.cpp b/gui/ThemeParser.cpp
new file mode 100644
index 0000000000..26745ac5a6
--- /dev/null
+++ b/gui/ThemeParser.cpp
@@ -0,0 +1,111 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#include "common/util.h"
+#include "common/system.h"
+#include "common/events.h"
+
+#include "gui/ThemeParser.h"
+
+/**
+
+<drawdata = "background_default" cache = true>
+	<draw func = "roundedsq" fill = "gradient" gradient_start = "255, 255, 128" gradient_end = "128, 128, 128" size = "auto">
+	<draw func = "roundedsq" fill = "none" color = "0, 0, 0" size = "auto">
+</drawdata>
+
+*/
+
+namespace GUI {
+
+inline bool isValidNameChar(char c) {
+	return !isspace(c) && c != '/' && c != '*' && c != '\\' && 
+		c != '|' && c != '"' && c != '\'' && c != ',' && 
+		c != '<' && c != '>' && c != '=';
+}
+
+void ThemeParser::parserError(const char *error_string) {
+	_state = kParserError;
+}
+
+bool ThemeParser::parseDrawData() {
+
+	_state = kParserNeedKey;
+	
+	while (_text[_pos++]) {
+
+		while (isspace(_text[_pos]))
+			_pos++;
+
+		// comment handling: skip everything between /* and */
+		if (_text[_pos] == '/') {
+			if (_text[++_pos] != '*') {
+				parserError("Malformed comment string.");
+				return false;
+			}
+			
+			_pos++;
+
+			while (_text[_pos] != '*' && _text[_pos + 1] != '/')
+				_pos++;
+		}
+
+		switch (_state) {
+			case kParserNeedKey:
+				if (_text[_pos] != '<') {
+					parserError("Expecting key start.");
+					return false;
+				}
+
+				_state = kParserKeyNeedName;
+				break;
+
+			case kParserKeyNeedName:
+				_token.clear();
+				while (isValidNameChar(_text[_pos]))
+					_token += _text[_pos++];
+
+				if (!isspace(_text[_pos])) {
+					parserError("Invalid character in token name.");
+					return false;
+				}
+
+				_state = kParserKeyNeedToken;
+				break;
+
+			case kParserKeyNeedToken:
+				_token.clear();
+				break;
+
+			default:
+				return false;
+		}
+	}
+
+	return true;
+}
+
+}
+