Initial commit

engines/ultima/shared/engine/messages.cpp

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+/* 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 3 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, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "ultima/shared/engine/messages.h"
+#include "ultima/shared/early/ultima_early.h"
+#include "ultima/shared/early/game_base.h"
+#include "ultima/shared/gfx/screen.h"
+#include "ultima/shared/early/game.h"
+
+namespace Ultima {
+namespace Shared {
+
+CMessage::CMessage() : BaseObject() {
+}
+
+bool CMessage::execute(TreeItem *target, const ClassDef *classDef, int flags) {
+	// If no target was specified, then there's nothing to do
+	if (!target)
+		return false;
+
+	bool result = false;
+	TreeItem *item = target;
+	TreeItem *nextItem = nullptr;
+	do {
+		if (flags & MSGFLAG_SCAN)
+			nextItem = item->scan(target);
+
+		if (!classDef || item->isInstanceOf(*classDef)) {
+			bool handled = perform(item);
+
+			if (handled) {
+				result = true;
+				if (flags & MSGFLAG_BREAK_IF_HANDLED)
+					return true;
+			}
+		}
+
+		item = nextItem;
+	} while (nextItem);
+
+	return result;
+}
+
+bool CMessage::execute(const Common::String &target, const ClassDef *classDef, int flags) {
+	// Scan for the target by name
+	GameBase *game = g_vm->_game;
+	for (TreeItem *treeItem = game; treeItem; treeItem = treeItem->scan(game)) {
+		if (!treeItem->getName().compareToIgnoreCase(target))
+			return execute(treeItem, classDef, flags);
+	}
+
+	return false;
+}
+
+const MSGMAP_ENTRY *CMessage::findMapEntry(const TreeItem *treeItem, const ClassDef &classDef) {
+	// Iterate through the class and any parent classes
+	for (const MSGMAP *msgMap = treeItem->getMessageMap(); msgMap->pFnGetBaseMap;
+		msgMap = msgMap->pFnGetBaseMap()) {
+		// Iterate through the map entries for this class
+		for (const MSGMAP_ENTRY *entry = msgMap->lpEntries;
+			entry->_classDef != nullptr; ++entry) {
+			// Check if the class or any of it's ancesotrs is handled by this entry
+			for (ClassDef def = (*entry->_classDef)(); def.hasParent(); def = def.parent()) {
+				if (def == classDef)
+					return entry;
+			}
+		}
+	}
+
+	return nullptr;
+}
+
+bool CMessage::perform(TreeItem *treeItem) {
+	const MSGMAP_ENTRY *entry = findMapEntry(treeItem, getType());
+	return entry && (*treeItem.*(entry->_fn))(this);
+}
+
+bool CMessage::supports(const TreeItem *treeItem, const ClassDef &classDef) {
+	return findMapEntry(treeItem, classDef) != nullptr;
+}
+
+bool CMessage::isMouseMsg() const {
+	return dynamic_cast<const CMouseMsg *>(this) != nullptr;
+}
+
+bool CMessage::isButtonDownMsg() const {
+	return dynamic_cast<const CMouseButtonDownMsg *>(this) != nullptr;
+}
+
+bool CMessage::isButtonUpMsg() const {
+	return dynamic_cast<const CMouseButtonUpMsg *>(this) != nullptr;
+}
+
+bool CMessage::isMouseMoveMsg() const {
+	return dynamic_cast<const CMouseMoveMsg *>(this) != nullptr;
+}
+
+bool CMessage::isDoubleClickMsg() const {
+	return dynamic_cast<const CMouseDoubleClickMsg *>(this) != nullptr;
+}
+
+} // End of namespace Shared
+} // End of namespace Ultima