[qwaq] Implement cursor motion in the editor

Basic arrow key motion, and it's currently limited to not scrolling
horizontally (need to figure out how to handle max scroll), but this
also fixes the cursor handling on focus switching :)

ruamoko/qwaq/editor/editor.h

@@ -28,6 +28,10 @@
 -scrollDown:(unsigned) count;
 -scrollLeft:(unsigned) count;
 -scrollRight:(unsigned) count;
+-cursorUp:(unsigned) count;
+-cursorDown:(unsigned) count;
+-cursorLeft:(unsigned) count;
+-cursorRight:(unsigned) count;
 
 -recenter:(int) force;
 -gotoLine:(unsigned) line;

ruamoko/qwaq/editor/editor.r

@@ -94,6 +94,18 @@ handleEvent (Editor *self, qwaq_event_t *event)
 			case QFK_PAGEDOWN:
 				[self scrollDown: self.ylen];
 				return 1;
+			case QFK_UP:
+				[self cursorUp: 1];
+				return 1;
+			case QFK_DOWN:
+				[self cursorDown: 1];
+				return 1;
+			case QFK_LEFT:
+				[self cursorLeft: 1];
+				return 1;
+			case QFK_RIGHT:
+				[self cursorRight: 1];
+				return 1;
 		}
 	}
 	return 0;
@@ -139,6 +151,7 @@ handleEvent (Editor *self, qwaq_event_t *event)
 		base.x = 0;
 	}
 	[self redraw];
+	[self moveCursor: {cursor.x - base.x, cursor.y - base.y}];
 	return self;
 }
 
@@ -150,6 +163,7 @@ handleEvent (Editor *self, qwaq_event_t *event)
 		base.x = 1024;
 	}
 	[self redraw];
+	[self moveCursor: {cursor.x - base.x, cursor.y - base.y}];
 	return self;
 }
 
@@ -161,6 +175,60 @@ handleEvent (Editor *self, qwaq_event_t *event)
 		base_index = [buffer prevLine:base_index :base.y - target];
 	}
 	base.y = target;
+	[vScrollBar setIndex:base.y];
+	[self moveCursor: {cursor.x - base.x, cursor.y - base.y}];
+	return self;
+}
+
+-cursorUp:(unsigned)count
+{
+	if (count > cursor.y) {
+		count = cursor.y;
+	}
+	cursor.y -= count;
+	if (base.y > cursor.y) {
+		[vScrollBar setIndex:cursor.y];
+	}
+	[self moveCursor: {cursor.x - base.x, cursor.y - base.y}];
+	return self;
+}
+
+-cursorDown:(unsigned)count
+{
+	if (count > line_count - cursor.y) {
+		count = line_count - cursor.y;
+	}
+	cursor.y += count;
+	if (base.y + ylen - 1 < cursor.y) {
+		[vScrollBar setIndex:cursor.y + 1 - ylen];
+	}
+	[self moveCursor: {cursor.x - base.x, cursor.y - base.y}];
+	return self;
+}
+
+-cursorLeft:(unsigned)count
+{
+	if (count > cursor.x) {
+		count = cursor.x;
+	}
+	cursor.x -= count;
+	if (base.x > cursor.x) {
+		[hScrollBar setIndex:cursor.x];
+	}
+	[self moveCursor: {cursor.x - base.x, cursor.y - base.y}];
+	return self;
+}
+
+-cursorRight:(unsigned)count
+{
+	// FIXME handle horizontal scrolling and how to deal with max scroll
+	cursor.x += count;
+	if (base.x + xlen - 1 < cursor.x) {
+		[hScrollBar setIndex:cursor.x + 1 - xlen];
+	}
+	if (base.x + xlen - 1 < cursor.x) {
+		cursor.x = base.x + xlen - 1;
+	}
 	[self moveCursor: {cursor.x - base.x, cursor.y - base.y}];
 	return self;
 }
@@ -168,8 +236,10 @@ handleEvent (Editor *self, qwaq_event_t *event)
 -(void)onScroll:(id)sender
 {
 	base.x = scroll.x;
+	if (base.y != scroll.y) {
 		[self scrollTo:scroll.y];
 	}
+}
 
 -setVerticalScrollBar:(ScrollBar *)scrollbar
 {

ruamoko/qwaq/ui/window.r

@@ -76,6 +76,7 @@
 	window_t    window = [(id)textContext window];
 	curs_set (cursorState);
 	wmove (window, cursorPos.x, cursorPos.y);
+	[[TextContext screen] refresh];
 	return self;
 }