fix(popup): fit the current X11 monitor

dat.h

@@ -22,6 +22,7 @@ enum
 	PopupSep	= 1,
 	PopupNumw	= Fontsz,
 	PopupTextw	= 12*Fontsz,
+	PopupBasew	= 2*PopupPad + PopupNumw + PopupTextw,
 	Maxrunes	= 64,
 	Maxutf	= Maxrunes * UTFmax + 1,
 };
@@ -31,7 +32,6 @@ enum
 	Maxclients	= 64,
 	Maxkouho	= 32,
 	Maxdisp		= 9,
-	Imgw		= 2*PopupPad + PopupNumw + PopupTextw,
 	Imgh		= 2*PopupPad + (Maxdisp + 2)*Fontsz + PopupSep,
 
 	Colfg	= 0x000000,
@@ -124,6 +124,15 @@ struct Im
 
 typedef struct Drawcmd Drawcmd;
 typedef struct Caret Caret;
+typedef struct Area Area;
+struct Area
+{
+	int	x;
+	int	y;
+	int	w;
+	int	h;
+};
+
 struct Caret
 {
 	int	valid;
@@ -149,6 +158,7 @@ struct Popup
 	int	w;
 	int	h;
 	int	n;
+	int	row0;
 	int	prey;
 	int	sepy;
 	int	rowsy;