SUPERNOVA: Extends screen message system

Messages will be 'removable' by over-rendering the message by invoking
removeMessage() with what was previously overdrawn.
_messageDisplayed might need to be reworked to an int, depending if
there are multiple messages rendered simultaneously.

2 files changed, 14 insertions, 4 deletions

diff --git a/engines/supernova/supernova.cpp b/engines/supernova/supernova.cpp
index 6c2bd688c3..eef19d28c2 100644
--- a/engines/supernova/supernova.cpp
+++ b/engines/supernova/supernova.cpp
@@ -251,9 +251,10 @@ static int characterWidth(const char *text) {
 	return charWidth;
 }
 
-void SupernovaEngine::renderMessage(char *text, MessagePosition position) {
+void SupernovaEngine::renderMessage(const char *text, MessagePosition position) {
+	Common::String t(text);
 	char *row[20];
-	char *p = text;
+	Common::String::iterator p = t.begin();
 	size_t numRows = 0;
 	int rowWidthMax = 0;
 	int x = 0;
@@ -318,7 +319,13 @@ void SupernovaEngine::renderMessage(char *text, MessagePosition position) {
 		y += 9;
 	}
 
-//	timer1 = (Common::strnlen(text, BUFSIZ) + 20) * textspeed / 10;
+	_messageDisplayed = true;
+//	_timer1 = (Common::strnlen(text, BUFSIZ) + 20) * textspeed / 10;
+}
+
+void SupernovaEngine::removeMessage() {
+	// TODO: restore surface
+	_messageDisplayed = false;
 }
 
 void SupernovaEngine::renderText(const char *text, int x, int y, byte color) {
diff --git a/engines/supernova/supernova.h b/engines/supernova/supernova.h
index f1f5b4a442..f3ccdf526c 100644
--- a/engines/supernova/supernova.h
+++ b/engines/supernova/supernova.h
@@ -84,6 +84,7 @@ private:
 	byte _menuBrightness;
 	byte _brightness;
 	uint _delay;
+	bool _messageDisplayed;
 
 	uint getDOSTicks();
 	void initData();
@@ -96,11 +97,13 @@ private:
 	void playSoundMod(int filenumber);
 	void stopSound();
 	void renderImage(int filenumber, int section, bool fullscreen = false);
-	void renderMessage(char *text, MessagePosition position);
+	void renderMessage(const char *text, MessagePosition position = kMessageNormal);
+	void removeMessage();
 	void renderText(const char *text, int x, int y, byte color);
 	void renderBox(int x, int y, int width, int height, byte color);
 };
 
+
 class Inventory {
 public:
 	Inventory();