Split ThemeParser into XMLParser and ThemeParser as child class to have a common XML Parser.

svn-id: r32734

1 files changed, 216 insertions, 0 deletions

diff --git a/common/xmlparser.cpp b/common/xmlparser.cpp
new file mode 100644
index 0000000000..7728d90d48
--- /dev/null
+++ b/common/xmlparser.cpp
@@ -0,0 +1,216 @@
+/* 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 "common/hashmap.h"
+#include "common/hash-str.h"
+#include "common/xmlparser.h"
+
+namespace Common {
+
+using namespace Graphics;
+
+void XMLParser::debug_testEval() {
+	static const char *debugConfigText =
+		"</* lol this is just a moronic test */drawdata id = \"background_default\" cache = true>\n"
+		"<drawstep func = \"roundedsq\" fill = \"gradient\" gradient_start = \"255, 255, 128\" gradient_end = \"128, 128, 128\" size = \"auto\"/>\n"
+		"//<drawstep func = \"roundedsq\" fill = \"none\" color = /*\"0, 0, 0\"*/\"0, 1, 2\" size = \"auto\"/>\n"
+		"</ drawdata>/* lol this is just a simple test*/\n";
+
+	_text = strdup(debugConfigText);
+
+	Common::String test = "12,  125, 125";
+
+	printf("\n\nRegex result: %s.\n\n", test.regexMatch("^[d]*,[d]*,[d]*$", true) ? "Success." : "Fail");
+
+	parse();
+}
+
+
+void XMLParser::parserError(const char *error_string) {
+	_state = kParserError;
+	printf("PARSER ERROR: %s\n", error_string);
+}
+
+void XMLParser::parseActiveKey(bool closed) {
+	if (keyCallback(_activeKey.top()->name) == false) {
+		parserError("Unhandled value inside key.");
+		return;
+	}
+	
+	if (closed) {
+		delete _activeKey.pop();
+	}
+}
+
+bool XMLParser::parseKeyValue(Common::String keyName) {
+	assert(_activeKey.empty() == false);
+
+	if (_activeKey.top()->values.contains(keyName))
+		return false;
+
+	_token.clear();
+	char stringStart;
+
+	if (_text[_pos] == '"' || _text[_pos] == '\'') {
+		stringStart = _text[_pos++];
+
+		while (_text[_pos] && _text[_pos] != stringStart)
+			_token += _text[_pos++];
+
+		if (_text[_pos++] == 0)
+			return false;
+
+	} else if (!parseToken()) {
+		return false;
+	}
+
+	_activeKey.top()->values[keyName] = _token;
+	return true;
+}
+
+bool XMLParser::parse() {
+
+	bool activeClosure = false;
+	bool selfClosure = false;
+
+	_state = kParserNeedKey;
+	_pos = 0;
+	_activeKey.clear();
+	
+	while (_text[_pos]) {
+		if (_state == kParserError)
+			break;
+
+		if (skipSpaces())
+			continue;
+
+		if (skipComments())
+			continue;
+
+		switch (_state) {
+			case kParserNeedKey:
+				if (_text[_pos++] != '<') {
+					parserError("Expecting key start.");
+					break;
+				}
+
+				if (_text[_pos] == 0) {
+					parserError("Unexpected end of file.");
+					break;
+				}
+
+				if (_text[_pos] == '/' && _text[_pos + 1] != '*') {
+					_pos++;
+					activeClosure = true;
+				}
+
+				_state = kParserNeedKeyName;
+				break;
+
+			case kParserNeedKeyName:
+				if (!parseToken()) {
+					parserError("Invalid key name.");
+					break;
+				}
+
+				if (activeClosure) {
+					if (_activeKey.empty() || _token != _activeKey.top()->name)
+						parserError("Unexpected closure.");
+				} else {
+					ParserNode *node = new ParserNode;
+					node->name = _token;
+					_activeKey.push(node);
+				}
+
+				_state = kParserNeedPropertyName;
+				break;
+
+			case kParserNeedPropertyName:
+				if (activeClosure) {
+					activeClosure = false;
+					delete _activeKey.pop();
+
+					if (_text[_pos++] != '>')
+						parserError("Invalid syntax in key closure.");
+					else 
+						_state = kParserNeedKey;
+
+					break;
+				}
+
+				selfClosure = (_text[_pos] == '/');
+
+				if ((selfClosure && _text[_pos + 1] == '>') || _text[_pos] == '>') {
+					parseActiveKey(selfClosure);
+					_pos += selfClosure ? 2 : 1;
+					_state = kParserNeedKey;
+					break;
+				}
+
+				if (!parseToken()) 
+					parserError("Error when parsing key value.");
+				else 
+					_state = kParserNeedPropertyOperator;
+
+				break;
+
+			case kParserNeedPropertyOperator:
+				if (_text[_pos++] != '=') 
+					parserError("Unexpected character after key name.");
+				else  
+					_state = kParserNeedPropertyValue;
+
+				break;
+
+			case kParserNeedPropertyValue:
+				if (!parseKeyValue(_token)) 
+					parserError("Unable to parse key value.");
+				else 
+					_state = kParserNeedPropertyName;
+
+				break;
+
+			default:
+				break;
+		}
+	}
+
+	if (_state == kParserError) {
+		return false;
+	}
+
+	if (_state != kParserNeedKey || !_activeKey.empty()) {
+		parserError("Unexpected end of file.");
+		return false;
+	}
+
+	return true;
+}
+
+}
+