TITANIC: Added various TTparser & TTconcept support methods

5 files changed, 77 insertions, 2 deletions

diff --git a/engines/titanic/true_talk/tt_concept.cpp b/engines/titanic/true_talk/tt_concept.cpp
index 05e6401018..2c54f2fab6 100644
--- a/engines/titanic/true_talk/tt_concept.cpp
+++ b/engines/titanic/true_talk/tt_concept.cpp
@@ -242,6 +242,11 @@ bool TTconcept::checkWordId2() const {
 	return (_wordP && _wordP->_id == 204) || (_scriptP && _scriptP->getId() == 3);
 }
 
+bool TTconcept::checkWordId3() const {
+	return isWordClass(WC_ABSTRACT) || isWordClass(WC_ADJECTIVE) ||
+		(isWordClass(WC_ADVERB) && getWordId() != 910);
+}
+
 bool TTconcept::checkWordClass() const {
 	return !_scriptP && _wordP && (_wordP->_wordClass == WC_THING || _wordP->_wordClass == WC_PRONOUN);
 }
diff --git a/engines/titanic/true_talk/tt_concept.h b/engines/titanic/true_talk/tt_concept.h
index 8168d4ebe1..98a6ee6ea3 100644
--- a/engines/titanic/true_talk/tt_concept.h
+++ b/engines/titanic/true_talk/tt_concept.h
@@ -118,12 +118,20 @@ public:
 	 */
 	bool isValid() const { return _status == SS_VALID; }
 
+	/**
+	 * Returns true if the word is of the specified class
+	 */
+	bool isWordClass(WordClass wordClass) const { 
+		return _wordP && _wordP->isClass(wordClass); 
+	}
+
 	void setFlag(bool val) { _flag = val; }
 
 	void set1C(int val) { _field1C = val; }
 
 	bool checkWordId1() const;
 	bool checkWordId2() const;
+	bool checkWordId3() const;
 	bool checkWordClass() const;
 
 	/**
diff --git a/engines/titanic/true_talk/tt_concept_node.cpp b/engines/titanic/true_talk/tt_concept_node.cpp
index aca5718bca..956d87bb68 100644
--- a/engines/titanic/true_talk/tt_concept_node.cpp
+++ b/engines/titanic/true_talk/tt_concept_node.cpp
@@ -51,7 +51,6 @@ TTconceptNode::TTconceptNode(const TTconceptNode &src) : _concept0P(_concepts[0]
 	}
 }
 
-
 void TTconceptNode::deleteSiblings() {
 	// Iterate through the linked chain of nodes, deleting each in turn
 	for (TTconceptNode *curP = _nextP, *nextP = nullptr; nextP; curP = nextP) {
diff --git a/engines/titanic/true_talk/tt_parser.cpp b/engines/titanic/true_talk/tt_parser.cpp
index d02aec931a..7b9f4c4c1c 100644
--- a/engines/titanic/true_talk/tt_parser.cpp
+++ b/engines/titanic/true_talk/tt_parser.cpp
@@ -790,7 +790,13 @@ int TTparser::considerRequests(TTword *word) {
 				break;
 
 			case SEEK_ACTOR:
+				if (_sentenceConcept->_concept0P) {
 
+				}
+				else {
+
+				}
+				break;
 
 			case SEEK_OBJECT:
 			case SEEK_OBJECT_OVERRIDE:
@@ -854,6 +860,30 @@ int TTparser::addConcept(TTconcept *concept) {
 	return SS_VALID;
 }
 
+void TTparser::removeConcept(TTconcept *concept) {
+	// If no concept passed, exit immediately
+	if (!concept)
+		return;
+
+	if (_conceptP == concept) {
+		// Concept specified is the ver ystart of the linked list, so reset head pointer
+		_conceptP = _conceptP->_nextP;
+	} else {
+		// Scan through the linked list, looking for the specific concept
+		for (TTconcept *currP = _conceptP; currP; currP = currP->_nextP) {
+			if (currP->_nextP == concept) {
+				// Found match, so unlink the next link from the chain
+				currP->_nextP = currP->_nextP->_nextP;
+				break;
+			}
+		}
+	}
+
+	// FInally, delete the concept
+	concept->_nextP = nullptr;
+	delete concept;
+}
+
 int TTparser::fn1() {
 	// TODO
 	return 0;
@@ -917,4 +947,31 @@ void TTparser::conceptChanged(TTconcept *newConcept, TTconcept *oldConcept) {
 		_currentConceptP = newConcept;
 }
 
+bool TTparser::checkConcept2(TTconcept *concept, int conceptMode) {
+	switch (conceptMode) {
+	case 3:
+		return concept->checkWordId2();
+
+	case 5:
+		return concept->checkWordClass();
+
+	case 8:
+		return concept->checkWordId1();
+
+	case 9:
+		if (!concept->checkWordId3() && _sentenceConcept->_concept2P) {
+			if (!_sentenceConcept->_concept2P->checkWordId2() || !concept->checkWordId2()) {
+				return _sentenceConcept->_concept2P->checkWordClass() &&
+					concept->checkWordClass();
+			}
+		}
+		break;
+
+	default:
+		break;
+	}
+
+	return false;
+}
+
 } // End of namespace Titanic
diff --git a/engines/titanic/true_talk/tt_parser.h b/engines/titanic/true_talk/tt_parser.h
index 3e8c91c917..512acbec89 100644
--- a/engines/titanic/true_talk/tt_parser.h
+++ b/engines/titanic/true_talk/tt_parser.h
@@ -147,7 +147,6 @@ private:
 	int processRequests(TTword *word);
 
 	void addToConceptList(TTword *word);
-	int fn2(TTword *word);
 	int checkReferent(TTpronoun *pronoun);
 
 	/**
@@ -160,8 +159,15 @@ private:
 	 */
 	int addConcept(TTconcept *concept);
 
+	/**
+	 * Detaches a concept from the main concept list if prseent, then deletes it
+	 */
+	void removeConcept(TTconcept *concept);
+
 	int fn1();
+	int fn2(TTword *word);
 	bool fn3(TTconcept **v, int v2);
+	bool checkConcept2(TTconcept *concept, int conceptMode);
 public:
 	CScriptHandler *_owner;
 	TTsentenceConcept *_sentenceConcept;