GLK: FROTZ: Implement PageUp/PageDn scrolling of desc area in Beyond Zork

engines/glk/frotz/glk_interface.cpp

@@ -194,6 +194,13 @@ void GlkInterface::initialize() {
 
 	// Add any sound folder or zip
 	addSound();
+
+	// For Beyond Zork the Page Up/Down keys are remapped to scroll the description area,
+	// since the arrow keys the original used are in use now for cycling prior commands
+	if (_storyId == BEYOND_ZORK) {
+		uint32 KEYCODES[2] = { keycode_PageUp, keycode_PageDown };
+		glk_set_terminators_line_event(gos_lower, KEYCODES, 2);
+	}
 }
 
 void GlkInterface::addSound() {
@@ -588,6 +595,16 @@ zchar GlkInterface::os_read_line(int max, zchar *buf, int timeout, int width, in
 		reset_status_ht();
 	curr_status_ht = 0;
 
+	if (ev.val2) {
+		// Line terminator specified, so return it
+		if (_storyId == BEYOND_ZORK && ev.val2 == keycode_PageUp)
+			return ZC_ARROW_UP;
+		else if (_storyId == BEYOND_ZORK && ev.val2 == keycode_PageDown)
+			return ZC_ARROW_DOWN;
+
+		return ev.val2;
+	}
+
 	return ZC_RETURN;
 }
 

engines/glk/glk_api.cpp

@@ -138,7 +138,7 @@ uint GlkAPI::glk_gestalt_ext(uint id, uint val, uint *arr, uint arrlen) {
 		return g_conf->_sound;
 
 	case gestalt_LineTerminatorKey:
-		return Window::checkTerminator(val);
+		return Window::checkBasicTerminators(val);
 
 	case gestalt_Timer:
 	case gestalt_Unicode:

engines/glk/window_text_buffer.cpp

@@ -762,9 +762,10 @@ void TextBufferWindow::cancelLineEvent(Event *ev) {
 	_lineRequest = false;
 	_lineRequestUni = false;
 	if (_lineTerminators) {
-		free(_lineTerminators);
+		delete[] _lineTerminators;
 		_lineTerminators = nullptr;
 	}
+
 	_inBuf = nullptr;
 	_inMax = 0;
 
@@ -1246,15 +1247,10 @@ void TextBufferWindow::acceptReadLine(uint32 arg) {
 	if (_height < 2)
 		_scrollPos = 0;
 
-	if (_scrollPos || arg == keycode_PageUp || arg == keycode_MouseWheelUp) {
-		acceptScroll(arg);
-		return;
-	}
-
 	if (!_inBuf)
 		return;
 
-	if (_lineTerminators && checkTerminator(arg)) {
+	if (_lineTerminators && checkTerminators(arg)) {
 		for (cx = _lineTerminators; *cx; cx++) {
 			if (*cx == arg) {
 				acceptLine(arg);
@@ -1263,6 +1259,11 @@ void TextBufferWindow::acceptReadLine(uint32 arg) {
 		}
 	}
 
+	if (_scrollPos || arg == keycode_PageUp || arg == keycode_MouseWheelUp) {
+		acceptScroll(arg);
+		return;
+	}
+
 	switch (arg) {
 	// History keys (up and down)
 	case keycode_Up:
@@ -1442,10 +1443,16 @@ void TextBufferWindow::acceptLine(uint32 keycode) {
 	_attr = _origAttr;
 
 	if (_lineTerminators) {
-		uint val2 = keycode;
-		if (val2 == keycode_Return)
-			val2 = 0;
-		g_vm->_events->store(evtype_LineInput, this, len, val2);
+		if (keycode == keycode_Return)
+			keycode = 0;
+		else
+			// TODO: Currently particularly for Beyond Zork, we don't echo a newline
+			// for line terminators, allowing description area scrolling to not keep adding
+			// blank lines in the command area. In the future I may need to make it configurable
+			// when I see if any other line terminators need to have a newline
+			_echoLineInput = false;
+
+		g_vm->_events->store(evtype_LineInput, this, len, keycode);
 		free(_lineTerminators);
 		_lineTerminators = nullptr;
 	} else {

engines/glk/window_text_grid.cpp

@@ -465,7 +465,7 @@ void TextGridWindow::acceptReadLine(uint32 arg) {
 	if (!_inBuf)
 		return;
 
-	if (_lineTerminators && checkTerminator(arg)) {
+	if (_lineTerminators && checkTerminators(arg)) {
 		const uint32 *cx;
 		for (cx = _lineTerminators; *cx; cx++) {
 			if (*cx == arg) {

engines/glk/windows.cpp

@@ -342,6 +342,10 @@ void Windows::inputScrollFocus() {
 void Windows::inputHandleKey(uint key) {
 	if (_moreFocus) {
 		inputMoreFocus();
+	} else if (_focusWin && (_focusWin->_lineRequest || _focusWin->_lineRequestUni) &&
+			_focusWin->checkTerminators(key)) {
+		// WORKAROUND: Do line terminators checking first. This was first needed for Beyond Zork,
+		// since it needs the Page Up/Down keys to scroll the description area rathern than the buffer area
 	} else {
 		switch (key) {
 		case keycode_Tab:
@@ -633,7 +637,7 @@ const WindowStyle *Window::getStyles() const {
 
 void Window::setTerminatorsLineEvent(const uint32 *keycodes, uint count) {
 	if (dynamic_cast<TextBufferWindow *>(this) || dynamic_cast<TextGridWindow *>(this)) {
-		delete _lineTerminatorsBase;
+		delete[] _lineTerminatorsBase;
 		_lineTerminatorsBase = nullptr;
 
 		if (!keycodes || count == 0) {
@@ -651,7 +655,7 @@ void Window::setTerminatorsLineEvent(const uint32 *keycodes, uint count) {
 	}
 }
 
-bool Window::checkTerminator(uint32 ch) {
+bool Window::checkBasicTerminators(uint32 ch) {
 	if (ch == keycode_Escape)
 		return true;
 	else if (ch >= keycode_Func12 && ch <= keycode_Func1)
@@ -660,6 +664,18 @@ bool Window::checkTerminator(uint32 ch) {
 		return false;
 }
 
+bool Window::checkTerminators(uint32 ch) {
+	if (checkBasicTerminators(ch))
+		return true;
+
+	for (uint idx = 0; idx < _termCt; ++idx) {
+		if (_lineTerminatorsBase[idx] == ch)
+			return true;
+	}
+
+	return false;
+}
+
 bool Window::imageDraw(uint image, uint align, int val1, int val2) {
 	if (!g_conf->_graphics)
 		return false;

engines/glk/windows.h

@@ -396,7 +396,7 @@ public:
 
 	gidispatch_rock_t _dispRock;
 public:
-	static bool checkTerminator(uint32 ch);
+	static bool checkBasicTerminators(uint32 ch);
 public:
 	/**
 	 * Constructor
@@ -498,6 +498,8 @@ public:
 
 	int acceptScroll(uint arg);
 
+	bool checkTerminators(uint32 ch);
+
 	void setTerminatorsLineEvent(const uint32 *keycodes, uint count);
 
 	virtual void acceptReadLine(uint32 arg);