X-Git-Url: https://jasonwoof.com/gitweb/?p=st.git;a=blobdiff_plain;f=st.c;h=afa6813989c5b545a94c7b0c346b6aa6510c8e86;hp=dbbc1f69b66596683d4bf19d5f88e4c5d777b006;hb=be7c6d7fb09ff50127332060d771b94a3bc8e44c;hpb=7474a2fc3785eb1aad00f8cf2b50711bbe1fff0b

diff --git a/st.c b/st.c
index dbbc1f6..afa6813 100644
--- a/st.c
+++ b/st.c
@@ -25,7 +25,6 @@
 #include <X11/Xutil.h>
 #include <X11/cursorfont.h>
 #include <X11/keysym.h>
-#include <X11/extensions/Xdbe.h>
 #include <X11/Xft/Xft.h>
 #include <fontconfig/fontconfig.h>
 
@@ -44,7 +43,7 @@
 #endif
 
 #define USAGE \
-	"st " VERSION " (c) 2010-2012 st engineers\n" \
+	"st " VERSION " (c) 2010-2013 st engineers\n" \
 	"usage: st [-v] [-c class] [-f font] [-g geometry] [-o file]" \
 	" [-t title] [-w windowid] [-e command ...]\n"
 
@@ -53,19 +52,19 @@
 #define XEMBED_FOCUS_OUT 5
 
 /* Arbitrary sizes */
-#define ESC_BUF_SIZ   256
+#define UTF_SIZ       4
+#define ESC_BUF_SIZ   (128*UTF_SIZ)
 #define ESC_ARG_SIZ   16
-#define STR_BUF_SIZ   256
-#define STR_ARG_SIZ   16
+#define STR_BUF_SIZ   ESC_BUF_SIZ
+#define STR_ARG_SIZ   ESC_ARG_SIZ
 #define DRAW_BUF_SIZ  20*1024
-#define UTF_SIZ       4
-#define XK_NO_MOD     UINT_MAX
-#define XK_ANY_MOD    0
+#define XK_ANY_MOD    UINT_MAX
+#define XK_NO_MOD     0
+#define XK_SWITCH_MOD (1<<13)
 
 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
 
 /* macros */
-#define CLEANMASK(mask) (mask & (ShiftMask|ControlMask|Mod1Mask|Mod2Mask|Mod3Mask|Mod4Mask|Mod5Mask))
 #define SERRNO strerror(errno)
 #define MIN(a, b)  ((a) < (b) ? (a) : (b))
 #define MAX(a, b)  ((a) < (b) ? (b) : (a))
@@ -74,7 +73,7 @@
 #define BETWEEN(x, a, b)  ((a) <= (x) && (x) <= (b))
 #define LIMIT(x, a, b)    (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
-#define IS_SET(flag) (term.mode & (flag))
+#define IS_SET(flag) ((term.mode & (flag)) != 0)
 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
 
 #define VT102ID "\033[?6c"
@@ -90,10 +89,6 @@ enum glyph_attribute {
 };
 
 enum cursor_movement {
-	CURSOR_UP,
-	CURSOR_DOWN,
-	CURSOR_LEFT,
-	CURSOR_RIGHT,
 	CURSOR_SAVE,
 	CURSOR_LOAD
 };
@@ -122,7 +117,8 @@ enum term_mode {
 	MODE_KBDLOCK     = 256,
 	MODE_HIDE	 = 512,
 	MODE_ECHO	 = 1024,
-	MODE_APPCURSOR	 = 2048
+	MODE_APPCURSOR	 = 2048,
+	MODE_MOUSESGR    = 4096,
 };
 
 enum escape_state {
@@ -140,6 +136,11 @@ enum window_state {
 	WIN_FOCUSED = 4
 };
 
+enum selection_type {
+	SEL_REGULAR = 1,
+	SEL_RECTANGULAR = 2
+};
+
 /* bit macro */
 #undef B0
 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
@@ -157,7 +158,7 @@ typedef struct {
 	uchar state; /* state flags    */
 } Glyph;
 
-typedef Glyph* Line;
+typedef Glyph *Line;
 
 typedef struct {
 	Glyph attr;	 /* current char attributes */
@@ -173,7 +174,7 @@ typedef struct {
 	int len;	       /* raw string length */
 	char priv;
 	int arg[ESC_ARG_SIZ];
-	int narg;	      /* nb of args */
+	int narg;	       /* nb of args */
 	char mode;
 } CSIEscape;
 
@@ -199,6 +200,7 @@ typedef struct {
 	int bot;	/* bottom scroll limit */
 	int mode;	/* terminal mode flags */
 	int esc;	/* escape state flags */
+	bool numlock;	/* lock numbers in keyboard */
 	bool *tabs;
 } Term;
 
@@ -207,7 +209,7 @@ typedef struct {
 	Display *dpy;
 	Colourmap cmap;
 	Window win;
-	XdbeBackBuffer buf;
+	Drawable buf;
 	Atom xembed, wmdeletewin;
 	XIM xim;
 	XIC xic;
@@ -217,8 +219,7 @@ typedef struct {
 	bool isfixed; /* is fixed geometry? */
 	int fx, fy, fw, fh; /* fixed geometry */
 	int tw, th; /* tty width and height */
-	int w;	/* window width */
-	int h;	/* window height */
+	int w, h; /* window width and height */
 	int ch; /* char height */
 	int cw; /* char width  */
 	char state; /* focus, redraw, visible */
@@ -237,6 +238,7 @@ typedef struct {
 /* TODO: use better name for vars... */
 typedef struct {
 	int mode;
+	int type;
 	int bx, by;
 	int ex, ey;
 	struct {
@@ -264,8 +266,10 @@ typedef struct {
 } Shortcut;
 
 /* function definitions used in config.h */
-static void xzoom(const Arg *);
+static void clippaste(const Arg *);
+static void numlock(const Arg *);
 static void selpaste(const Arg *);
+static void xzoom(const Arg *);
 
 /* Config.h for applying patches and the configuration. */
 #include "config.h"
@@ -278,18 +282,21 @@ typedef struct {
 	int descent;
 	short lbearing;
 	short rbearing;
-	XftFont *set;
+	XftFont *match;
+	FcFontSet *set;
+	FcPattern *pattern;
 } Font;
 
 /* Drawing Context */
 typedef struct {
 	Colour col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
 	Font font, bfont, ifont, ibfont;
+	GC gc;
 } DC;
 
 static void die(const char *, ...);
 static void draw(void);
-static void redraw(void);
+static void redraw(int);
 static void drawregion(int, int, int, int);
 static void execsh(void);
 static void sigchld(int);
@@ -304,7 +311,7 @@ static void strhandle(void);
 static void strparse(void);
 static void strreset(void);
 
-static void tclearregion(int, int, int, int);
+static void tclearregion(int, int, int, int, int);
 static void tcursor(int);
 static void tdeletechar(int);
 static void tdeleteline(int);
@@ -329,6 +336,7 @@ static void tsetmode(bool, bool, int *, int);
 static void tfulldirt(void);
 static void techo(char *, int);
 
+static inline bool match(uint, uint);
 static void ttynew(void);
 static void ttyread(void);
 static void ttyresize(void);
@@ -340,10 +348,15 @@ static void xclear(int, int, int, int);
 static void xdrawcursor(void);
 static void xinit(void);
 static void xloadcols(void);
+static int xsetcolorname(int, const char *);
+static int xloadfont(Font *, FcPattern *);
+static void xloadfonts(char *, int);
+static void xsettitle(char *);
 static void xresettitle(void);
 static void xseturgency(int);
 static void xsetsel(char*);
 static void xtermclear(int, int, int, int);
+static void xunloadfonts(void);
 static void xresize(int, int);
 
 static void expose(XEvent *);
@@ -352,7 +365,7 @@ static void unmap(XEvent *);
 static char *kmap(KeySym, uint);
 static void kpress(XEvent *);
 static void cmessage(XEvent *);
-static void cresize(int width, int height);
+static void cresize(int, int);
 static void resize(XEvent *);
 static void focus(XEvent *);
 static void brelease(XEvent *);
@@ -375,7 +388,7 @@ static int isfullutf8(char *, int);
 static ssize_t xwrite(int, char *, size_t);
 static void *xmalloc(size_t);
 static void *xrealloc(void *, size_t);
-static void *xcalloc(size_t nmemb, size_t size);
+static void *xcalloc(size_t, size_t);
 
 static void (*handler[LASTEvent])(XEvent *) = {
 	[KeyPress] = kpress,
@@ -414,6 +427,28 @@ static char *opt_font = NULL;
 static char *usedfont = NULL;
 static int usedfontsize = 0;
 
+/* Font Ring Cache */
+enum {
+	FRC_NORMAL,
+	FRC_ITALIC,
+	FRC_BOLD,
+	FRC_ITALICBOLD
+};
+
+typedef struct {
+	XftFont *font;
+	long c;
+	int flags;
+} Fontcache;
+
+/*
+ * Fontcache is a ring buffer, with frccur as current position and frclen as
+ * the current length of used elements.
+ */
+
+static Fontcache frc[1024];
+static int frccur = -1, frclen = 0;
+
 ssize_t
 xwrite(int fd, char *s, size_t len) {
 	size_t aux = len;
@@ -622,29 +657,48 @@ selected(int x, int y) {
 			|| (y == sel.e.y && x <= sel.e.x))
 			|| (y == sel.b.y && x >= sel.b.x
 				&& (x <= sel.e.x || sel.b.y != sel.e.y));
+	switch(sel.type) {
+	case SEL_REGULAR:
+		return ((sel.b.y < y && y < sel.e.y)
+			|| (y == sel.e.y && x <= sel.e.x))
+			|| (y == sel.b.y && x >= sel.b.x
+				&& (x <= sel.e.x || sel.b.y != sel.e.y));
+	case SEL_RECTANGULAR:
+		return ((sel.b.y <= y && y <= sel.e.y)
+			&& (sel.b.x <= x && x <= sel.e.x));
+	};
 }
 
 void
-getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
-	if(b)
-		*b = e->xbutton.button;
+getbuttoninfo(XEvent *e) {
+	int type;
+	uint state = e->xbutton.state &~Button1Mask;
+
+	sel.alt = IS_SET(MODE_ALTSCREEN);
 
-	*x = x2col(e->xbutton.x);
-	*y = y2row(e->xbutton.y);
+	sel.ex = x2col(e->xbutton.x);
+	sel.ey = y2row(e->xbutton.y);
 
 	sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
 	sel.b.y = MIN(sel.by, sel.ey);
 	sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
 	sel.e.y = MAX(sel.by, sel.ey);
+
+	sel.type = SEL_REGULAR;
+	for(type = 1; type < LEN(selmasks); ++type) {
+		if(match(selmasks[type], state)) {
+			sel.type = type;
+			break;
+		}
+	}
 }
 
 void
 mousereport(XEvent *e) {
-	int x = x2col(e->xbutton.x);
-	int y = y2row(e->xbutton.y);
-	int button = e->xbutton.button;
-	int state = e->xbutton.state;
-	char buf[] = { '\033', '[', 'M', 0, 32+x+1, 32+y+1 };
+	int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
+	    button = e->xbutton.button, state = e->xbutton.state,
+	    len;
+	char buf[40];
 	static int ob, ox, oy;
 
 	/* from urxvt */
@@ -653,7 +707,9 @@ mousereport(XEvent *e) {
 			return;
 		button = ob + 32;
 		ox = x, oy = y;
-	} else if(e->xbutton.type == ButtonRelease || button == AnyButton) {
+	} else if(!IS_SET(MODE_MOUSESGR)
+			&& (e->xbutton.type == ButtonRelease
+				|| button == AnyButton)) {
 		button = 3;
 	} else {
 		button -= Button1;
@@ -665,11 +721,23 @@ mousereport(XEvent *e) {
 		}
 	}
 
-	buf[3] = 32 + button + (state & ShiftMask ? 4 : 0)
+	button += (state & ShiftMask   ? 4  : 0)
 		+ (state & Mod4Mask    ? 8  : 0)
 		+ (state & ControlMask ? 16 : 0);
 
-	ttywrite(buf, sizeof(buf));
+	len = 0;
+	if(IS_SET(MODE_MOUSESGR)) {
+		len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
+				button, x+1, y+1,
+				e->xbutton.type == ButtonRelease ? 'm' : 'M');
+	} else if(x < 223 && y < 223) {
+		len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
+				32+button, 32+x+1, 32+y+1);
+	} else {
+		return;
+	}
+
+	ttywrite(buf, len);
 }
 
 void
@@ -683,6 +751,7 @@ bpress(XEvent *e) {
 			draw();
 		}
 		sel.mode = 1;
+		sel.type = SEL_REGULAR;
 		sel.ex = sel.bx = x2col(e->xbutton.x);
 		sel.ey = sel.by = y2row(e->xbutton.y);
 	} else if(e->xbutton.button == Button4) {
@@ -705,7 +774,8 @@ selcopy(void) {
 		ptr = str = xmalloc(bufsize);
 
 		/* append every set & selected glyph to the selection */
-		for(y = 0; y < term.row; y++) {
+		for(y = sel.b.y; y < sel.e.y + 1; y++) {
+			is_selected = 0;
 			gp = &term.line[y][0];
 			last = gp + term.col;
 
@@ -713,8 +783,11 @@ selcopy(void) {
 				/* nothing */;
 
 			for(x = 0; gp <= last; x++, ++gp) {
-				if(!(is_selected = selected(x, y)))
+				if(!selected(x, y)) {
 					continue;
+				} else {
+					is_selected = 1;
+				}
 
 				p = (gp->state & GLYPH_SET) ? gp->c : " ";
 				size = utf8size(p);
@@ -727,7 +800,6 @@ selcopy(void) {
 		}
 		*ptr = 0;
 	}
-	sel.alt = IS_SET(MODE_ALTSCREEN);
 	xsetsel(str);
 }
 
@@ -759,7 +831,17 @@ selpaste(const Arg *dummy) {
 			xw.win, CurrentTime);
 }
 
-void selclear(XEvent *e) {
+void
+clippaste(const Arg *dummy) {
+	Atom clipboard;
+
+	clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
+	XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
+			xw.win, CurrentTime);
+}
+
+void
+selclear(XEvent *e) {
 	if(sel.bx == -1)
 		return;
 	sel.bx = -1;
@@ -828,7 +910,7 @@ brelease(XEvent *e) {
 		selpaste(NULL);
 	} else if(e->xbutton.button == Button1) {
 		sel.mode = 0;
-		getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
+		getbuttoninfo(e);
 		term.dirty[sel.ey] = 1;
 		if(sel.bx == sel.ex && sel.by == sel.ey) {
 			sel.bx = -1;
@@ -867,23 +949,24 @@ brelease(XEvent *e) {
 
 void
 bmotion(XEvent *e) {
-	int starty, endy, oldey, oldex;
+	int oldey, oldex, oldsby, oldsey;
 
 	if(IS_SET(MODE_MOUSE)) {
 		mousereport(e);
 		return;
 	}
 
-	if(sel.mode) {
-		oldey = sel.ey;
-		oldex = sel.ex;
-		getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
+	if(!sel.mode)
+		return;
 
-		if(oldey != sel.ey || oldex != sel.ex) {
-			starty = MIN(oldey, sel.ey);
-			endy = MAX(oldey, sel.ey);
-			tsetdirt(starty, endy);
-		}
+	oldey = sel.ey;
+	oldex = sel.ex;
+	oldsby = sel.b.y;
+	oldsey = sel.e.y;
+	getbuttoninfo(e);
+
+	if(oldey != sel.ey || oldex != sel.ex) {
+		tsetdirt(MIN(sel.b.y, oldsby), MAX(sel.e.y, oldsey));
 	}
 }
 
@@ -1087,7 +1170,7 @@ treset(void) {
 	term.bot = term.row - 1;
 	term.mode = MODE_WRAP;
 
-	tclearregion(0, 0, term.col-1, term.row-1);
+	tclearregion(0, 0, term.col-1, term.row-1, 0);
 	tmoveto(0, 0);
 	tcursor(CURSOR_SAVE);
 }
@@ -1107,6 +1190,8 @@ tnew(int col, int row) {
 		term.alt [row] = xmalloc(term.col * sizeof(Glyph));
 		term.dirty[row] = 0;
 	}
+
+	term.numlock = 1;
 	memset(term.tabs, 0, term.col * sizeof(*term.tabs));
 	/* setup screen */
 	treset();
@@ -1129,7 +1214,7 @@ tscrolldown(int orig, int n) {
 
 	LIMIT(n, 0, term.bot-orig+1);
 
-	tclearregion(0, term.bot-n+1, term.col-1, term.bot);
+	tclearregion(0, term.bot-n+1, term.col-1, term.bot, 0);
 
 	for(i = term.bot; i >= orig+n; i--) {
 		temp = term.line[i];
@@ -1149,7 +1234,7 @@ tscrollup(int orig, int n) {
 	Line temp;
 	LIMIT(n, 0, term.bot-orig+1);
 
-	tclearregion(0, orig, term.col-1, orig+n-1);
+	tclearregion(0, orig, term.col-1, orig+n-1, 0);
 
 	for(i = orig; i <= term.bot-n; i++) {
 		 temp = term.line[i];
@@ -1173,14 +1258,24 @@ selscroll(int orig, int n) {
 			sel.bx = -1;
 			return;
 		}
-		if(sel.by < term.top) {
-			sel.by = term.top;
-			sel.bx = 0;
-		}
-		if(sel.ey > term.bot) {
-			sel.ey = term.bot;
-			sel.ex = term.col;
-		}
+		switch(sel.type) {
+		case SEL_REGULAR:
+			if(sel.by < term.top) {
+				sel.by = term.top;
+				sel.bx = 0;
+			}
+			if(sel.ey > term.bot) {
+				sel.ey = term.bot;
+				sel.ex = term.col;
+			}
+			break;
+		case SEL_RECTANGULAR:
+			if(sel.by < term.top)
+				sel.by = term.top;
+			if(sel.ey > term.bot)
+				sel.ey = term.bot;
+			break;
+		};
 		sel.b.y = sel.by, sel.b.x = sel.bx;
 		sel.e.y = sel.ey, sel.e.x = sel.ex;
 	}
@@ -1277,7 +1372,7 @@ tsetchar(char *c, Glyph *attr, int x, int y) {
 }
 
 void
-tclearregion(int x1, int y1, int x2, int y2) {
+tclearregion(int x1, int y1, int x2, int y2, int bce) {
 	int x, y, temp;
 
 	if(x1 > x2)
@@ -1292,8 +1387,15 @@ tclearregion(int x1, int y1, int x2, int y2) {
 
 	for(y = y1; y <= y2; y++) {
 		term.dirty[y] = 1;
-		for(x = x1; x <= x2; x++)
-			term.line[y][x].state = 0;
+		for(x = x1; x <= x2; x++) {
+			if(bce) {
+				term.line[y][x] = term.c.attr;
+				memcpy(term.line[y][x].c, " ", 2);
+				term.line[y][x].state |= GLYPH_SET;
+			} else {
+				term.line[y][x].state = 0;
+			}
+		}
 	}
 }
 
@@ -1306,13 +1408,13 @@ tdeletechar(int n) {
 	term.dirty[term.c.y] = 1;
 
 	if(src >= term.col) {
-		tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
+		tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 0);
 		return;
 	}
 
 	memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
 			size * sizeof(Glyph));
-	tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
+	tclearregion(term.col-n, term.c.y, term.col-1, term.c.y, 0);
 }
 
 void
@@ -1324,13 +1426,13 @@ tinsertblank(int n) {
 	term.dirty[term.c.y] = 1;
 
 	if(dst >= term.col) {
-		tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
+		tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 0);
 		return;
 	}
 
 	memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
 			size * sizeof(Glyph));
-	tclearregion(src, term.c.y, dst - 1, term.c.y);
+	tclearregion(src, term.c.y, dst - 1, term.c.y, 0);
 }
 
 void
@@ -1364,13 +1466,14 @@ tsetattr(int *attr, int l) {
 		case 1:
 			term.c.attr.mode |= ATTR_BOLD;
 			break;
-		case 3: /* enter standout (highlight) */
+		case 3:
 			term.c.attr.mode |= ATTR_ITALIC;
 			break;
 		case 4:
 			term.c.attr.mode |= ATTR_UNDERLINE;
 			break;
-		case 5:
+		case 5: /* slow blink */
+		case 6: /* rapid blink */
 			term.c.attr.mode |= ATTR_BLINK;
 			break;
 		case 7:
@@ -1380,13 +1483,14 @@ tsetattr(int *attr, int l) {
 		case 22:
 			term.c.attr.mode &= ~ATTR_BOLD;
 			break;
-		case 23: /* leave standout (highlight) mode */
+		case 23:
 			term.c.attr.mode &= ~ATTR_ITALIC;
 			break;
 		case 24:
 			term.c.attr.mode &= ~ATTR_UNDERLINE;
 			break;
 		case 25:
+		case 26:
 			term.c.attr.mode &= ~ATTR_BLINK;
 			break;
 		case 27:
@@ -1482,7 +1586,7 @@ tsetmode(bool priv, bool set, int *args, int narg) {
 				mode = term.mode;
 				MODBIT(term.mode, set, MODE_REVERSE);
 				if(mode != term.mode)
-					redraw();
+					redraw(REDRAW_TIMEOUT);
 				break;
 			case 6: /* DECOM -- Origin */
 				MODBIT(term.c.state, set, CURSOR_ORIGIN);
@@ -1506,16 +1610,23 @@ tsetmode(bool priv, bool set, int *args, int narg) {
 				break;
 			case 1000: /* 1000,1002: enable xterm mouse report */
 				MODBIT(term.mode, set, MODE_MOUSEBTN);
+				MODBIT(term.mode, 0, MODE_MOUSEMOTION);
 				break;
 			case 1002:
 				MODBIT(term.mode, set, MODE_MOUSEMOTION);
+				MODBIT(term.mode, 0, MODE_MOUSEBTN);
+				break;
+			case 1006:
+				MODBIT(term.mode, set, MODE_MOUSESGR);
 				break;
 			case 1049: /* = 1047 and 1048 */
 			case 47:
 			case 1047: {
-				alt = IS_SET(MODE_ALTSCREEN) != 0;
-				if(alt)
-					tclearregion(0, 0, term.col-1, term.row-1);
+				alt = IS_SET(MODE_ALTSCREEN);
+				if(alt) {
+					tclearregion(0, 0, term.col-1,
+							term.row-1, 0);
+				}
 				if(set ^ alt)		/* set is always 1 or 0 */
 					tswapscreen();
 				if(*args != 1049)
@@ -1603,7 +1714,7 @@ csihandle(void) {
 		tmoveto(0, term.c.y-csiescseq.arg[0]);
 		break;
 	case 'g': /* TBC -- Tabulation clear */
-		switch (csiescseq.arg[0]) {
+		switch(csiescseq.arg[0]) {
 		case 0: /* clear current tab stop */
 			term.tabs[term.c.x] = 0;
 			break;
@@ -1634,17 +1745,19 @@ csihandle(void) {
 		sel.bx = -1;
 		switch(csiescseq.arg[0]) {
 		case 0: /* below */
-			tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
-			if(term.c.y < term.row-1)
-				tclearregion(0, term.c.y+1, term.col-1, term.row-1);
+			tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 1);
+			if(term.c.y < term.row-1) {
+				tclearregion(0, term.c.y+1, term.col-1,
+						term.row-1, 1);
+			}
 			break;
 		case 1: /* above */
 			if(term.c.y > 1)
-				tclearregion(0, 0, term.col-1, term.c.y-1);
-			tclearregion(0, term.c.y, term.c.x, term.c.y);
+				tclearregion(0, 0, term.col-1, term.c.y-1, 1);
+			tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
 			break;
 		case 2: /* all */
-			tclearregion(0, 0, term.col-1, term.row-1);
+			tclearregion(0, 0, term.col-1, term.row-1, 1);
 			break;
 		default:
 			goto unknown;
@@ -1653,13 +1766,14 @@ csihandle(void) {
 	case 'K': /* EL -- Clear line */
 		switch(csiescseq.arg[0]) {
 		case 0: /* right */
-			tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
+			tclearregion(term.c.x, term.c.y, term.col-1,
+					term.c.y, 1);
 			break;
 		case 1: /* left */
-			tclearregion(0, term.c.y, term.c.x, term.c.y);
+			tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
 			break;
 		case 2: /* all */
-			tclearregion(0, term.c.y, term.col-1, term.c.y);
+			tclearregion(0, term.c.y, term.col-1, term.c.y, 1);
 			break;
 		}
 		break;
@@ -1684,7 +1798,8 @@ csihandle(void) {
 		break;
 	case 'X': /* ECH -- Erase <n> char */
 		DEFAULT(csiescseq.arg[0], 1);
-		tclearregion(term.c.x, term.c.y, term.c.x + csiescseq.arg[0], term.c.y);
+		tclearregion(term.c.x, term.c.y,
+				term.c.x + csiescseq.arg[0] - 1, term.c.y, 1);
 		break;
 	case 'P': /* DCH -- Delete <n> char */
 		DEFAULT(csiescseq.arg[0], 1);
@@ -1754,32 +1869,37 @@ csireset(void) {
 
 void
 strhandle(void) {
-	char *p;
+	char *p = NULL;
+	int i, j, narg;
 
-	/*
-	 * TODO: make this being useful in case of color palette change.
-	 */
 	strparse();
-
-	p = strescseq.buf;
+	narg = strescseq.narg;
 
 	switch(strescseq.type) {
 	case ']': /* OSC -- Operating System Command */
-		switch(p[0]) {
-		case '0':
-		case '1':
-		case '2':
-			/*
-			 * TODO: Handle special chars in string, like umlauts.
-			 */
-			if(p[1] == ';') {
-				XStoreName(xw.dpy, xw.win, strescseq.buf+2);
-			}
-			break;
-		case ';':
-			XStoreName(xw.dpy, xw.win, strescseq.buf+1);
+		switch(i = atoi(strescseq.args[0])) {
+		case 0:
+		case 1:
+		case 2:
+			if(narg > 1)
+				xsettitle(strescseq.args[1]);
 			break;
-		case '4': /* TODO: Set color (arg0) to "rgb:%hexr/$hexg/$hexb" (arg1) */
+		case 4: /* color set */
+			if(narg < 3)
+				break;
+			p = strescseq.args[2];
+			/* fall through */
+		case 104: /* color reset, here p = NULL */
+			j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
+			if (!xsetcolorname(j, p)) {
+				fprintf(stderr, "erresc: invalid color %s\n", p);
+			} else {
+				/*
+				 * TODO if defaultbg color is changed, borders
+				 * are dirty
+				 */
+				redraw(0);
+			}
 			break;
 		default:
 			fprintf(stderr, "erresc: unknown str ");
@@ -1788,7 +1908,7 @@ strhandle(void) {
 		}
 		break;
 	case 'k': /* old title set compatibility */
-		XStoreName(xw.dpy, xw.win, strescseq.buf);
+		xsettitle(strescseq.args[0]);
 		break;
 	case 'P': /* DSC -- Device Control String */
 	case '_': /* APC -- Application Program Command */
@@ -1807,7 +1927,19 @@ strparse(void) {
 	 * TODO: Implement parsing like for CSI when required.
 	 * Format: ESC type cmd ';' arg0 [';' argn] ESC \
 	 */
-	return;
+	int narg = 0;
+	char *start = strescseq.buf, *end = start + strescseq.len;
+	strescseq.args[0] = start;
+	while(start < end && narg < LEN(strescseq.args)) {
+		start = memchr(start, ';', end - start);
+		if(!start)
+			break;
+		*start++ = '\0';
+		if(start < end) {
+			strescseq.args[++narg] = start;
+		}
+	}
+	strescseq.narg = narg + 1;
 }
 
 void
@@ -1864,7 +1996,7 @@ techo(char *buf, int len) {
 		if(c == '\033') {		/* escape */
 			tputc("^", 1);
 			tputc("[", 1);
-		} else if (c < '\x20') {	/* control code */
+		} else if(c < '\x20') {	/* control code */
 			if(c != '\n' && c != '\r' && c != '\t') {
 				c |= '\x40';
 				tputc("^", 1);
@@ -1874,7 +2006,7 @@ techo(char *buf, int len) {
 			break;
 		}
 	}
-	if (len)
+	if(len)
 		tputc(buf, len);
 }
 
@@ -1884,13 +2016,14 @@ tputc(char *c, int len) {
 	bool control = ascii < '\x20' || ascii == 0177;
 
 	if(iofd != -1) {
-		if (xwrite(iofd, c, len) < 0) {
-			fprintf(stderr, "Error writting in %s:%s\n",
+		if(xwrite(iofd, c, len) < 0) {
+			fprintf(stderr, "Error writing in %s:%s\n",
 				opt_io, strerror(errno));
 			close(iofd);
 			iofd = -1;
 		}
 	}
+
 	/*
 	 * STR sequences must be checked before anything else
 	 * because it can use some control codes as part of the sequence.
@@ -1905,10 +2038,23 @@ tputc(char *c, int len) {
 			strhandle();
 			break;
 		default:
-			strescseq.buf[strescseq.len++] = ascii;
-			if(strescseq.len+1 >= STR_BUF_SIZ) {
-				term.esc = 0;
-				strhandle();
+			if(strescseq.len + len < sizeof(strescseq.buf)) {
+				memmove(&strescseq.buf[strescseq.len], c, len);
+				strescseq.len += len;
+			} else {
+			/*
+			 * Here is a bug in terminals. If the user never sends
+			 * some code to stop the str or esc command, then st
+			 * will stop responding. But this is better than
+			 * silently failing with unknown characters. At least
+			 * then users will report back.
+			 *
+			 * In the case users ever get fixed, here is the code:
+			 */
+			/*
+			 * term.esc = 0;
+			 * strhandle();
+			 */
 			}
 		}
 		return;
@@ -1945,10 +2091,13 @@ tputc(char *c, int len) {
 			term.esc = ESC_START;
 			return;
 		case '\016':	/* SO */
-			term.c.attr.mode |= ATTR_GFX;
-			return;
 		case '\017':	/* SI */
-			term.c.attr.mode &= ~ATTR_GFX;
+			/*
+			 * Different charsets are hard to handle. Applications
+			 * should use the right alt charset escapes for the
+			 * only reason they still exist: line drawing. The
+			 * rest is incompatible history st should not support.
+			 */
 			return;
 		case '\032':	/* SUB */
 		case '\030':	/* CAN */
@@ -2086,7 +2235,7 @@ tputc(char *c, int len) {
 			}
 		}
 		/*
-		 * All characters which forms part of a sequence are not
+		 * All characters which form part of a sequence are not
 		 * printed
 		 */
 		return;
@@ -2100,11 +2249,19 @@ tputc(char *c, int len) {
 		sel.bx = -1;
 	if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
 		tnewline(1); /* always go to first col */
+
+	if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
+		memmove(&term.line[term.c.y][term.c.x+1],
+			&term.line[term.c.y][term.c.x],
+			(term.col - term.c.x - 1) * sizeof(Glyph));
+	}
+
 	tsetchar(c, &term.c.attr, term.c.x, term.c.y);
-	if(term.c.x+1 < term.col)
+	if(term.c.x+1 < term.col) {
 		tmoveto(term.c.x+1, term.c.y);
-	else
+	} else {
 		term.c.state |= CURSOR_WRAPNEXT;
+	}
 }
 
 int
@@ -2121,9 +2278,11 @@ tresize(int col, int row) {
 	/* free unneeded rows */
 	i = 0;
 	if(slide > 0) {
-		/* slide screen to keep cursor where we expect it -
+		/*
+		 * slide screen to keep cursor where we expect it -
 		 * tscrollup would work here, but we can optimize to
-		 * memmove because we're freeing the earlier lines */
+		 * memmove because we're freeing the earlier lines
+		 */
 		for(/* i = 0 */; i < slide; i++) {
 			free(term.line[i]);
 			free(term.alt[i]);
@@ -2181,16 +2340,27 @@ tresize(int col, int row) {
 
 void
 xresize(int col, int row) {
-	xw.tw = MAX(1, 2*borderpx + col * xw.cw);
-	xw.th = MAX(1, 2*borderpx + row * xw.ch);
+	xw.tw = MAX(1, col * xw.cw);
+	xw.th = MAX(1, row * xw.ch);
+
+	XFreePixmap(xw.dpy, xw.buf);
+	xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
+			DefaultDepth(xw.dpy, xw.scr));
+	XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg].pixel);
+	XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
 
 	XftDrawChange(xw.draw, xw.buf);
 }
 
+static inline ushort
+sixd_to_16bit(int x) {
+	return x == 0 ? 0 : 0x3737 + 0x2828 * x;
+}
+
 void
 xloadcols(void) {
 	int i, r, g, b;
-	XRenderColor color = { .alpha = 0 };
+	XRenderColor color = { .alpha = 0xffff };
 
 	/* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
 	for(i = 0; i < LEN(colorname); i++) {
@@ -2205,9 +2375,9 @@ xloadcols(void) {
 	for(i = 16, r = 0; r < 6; r++) {
 		for(g = 0; g < 6; g++) {
 			for(b = 0; b < 6; b++) {
-				color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
-				color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
-				color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
+				color.red = sixd_to_16bit(r);
+				color.green = sixd_to_16bit(g);
+				color.blue = sixd_to_16bit(b);
 				if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
 					die("Could not allocate color %d\n", i);
 				}
@@ -2225,6 +2395,38 @@ xloadcols(void) {
 	}
 }
 
+int
+xsetcolorname(int x, const char *name) {
+	XRenderColor color = { .alpha = 0xffff };
+	Colour colour;
+	if (x < 0 || x > LEN(colorname))
+		return -1;
+	if(!name) {
+		if(16 <= x && x < 16 + 216) {
+			int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
+			color.red = sixd_to_16bit(r);
+			color.green = sixd_to_16bit(g);
+			color.blue = sixd_to_16bit(b);
+			if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
+				return 0; /* something went wrong */
+			dc.col[x] = colour;
+			return 1;
+		} else if (16 + 216 <= x && x < 256) {
+			color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
+			if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
+				return 0; /* something went wrong */
+			dc.col[x] = colour;
+			return 1;
+		} else {
+			name = colorname[x];
+		}
+	}
+	if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
+		return 0;
+	dc.col[x] = colour;
+	return 1;
+}
+
 void
 xtermclear(int col1, int row1, int col2, int row2) {
 	XftDrawRect(xw.draw,
@@ -2241,7 +2443,7 @@ xtermclear(int col1, int row1, int col2, int row2) {
 void
 xclear(int x1, int y1, int x2, int y2) {
 	XftDrawRect(xw.draw,
-			&dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
+			&dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
 			x1, y1, x2-x1, y2-y1);
 }
 
@@ -2258,8 +2460,8 @@ xhints(void) {
 		sizeh->width = xw.w;
 		sizeh->height_inc = xw.ch;
 		sizeh->width_inc = xw.cw;
-		sizeh->base_height = 2*borderpx;
-		sizeh->base_width = 2*borderpx;
+		sizeh->base_height = 2 * borderpx;
+		sizeh->base_width = 2 * borderpx;
 	} else {
 		sizeh->flags = PMaxSize | PMinSize;
 		sizeh->min_width = sizeh->max_width = xw.fw;
@@ -2275,20 +2477,28 @@ xloadfont(Font *f, FcPattern *pattern) {
 	FcPattern *match;
 	FcResult result;
 
-	match = XftFontMatch(xw.dpy, xw.scr, pattern, &result);
+	match = FcFontMatch(NULL, pattern, &result);
 	if(!match)
 		return 1;
-	if(!(f->set = XftFontOpenPattern(xw.dpy, match))) {
+
+	if(!(f->set = FcFontSort(0, match, FcTrue, 0, &result))) {
+		FcPatternDestroy(match);
+		return 1;
+	}
+
+	if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
 		FcPatternDestroy(match);
 		return 1;
 	}
 
-	f->ascent = f->set->ascent;
-	f->descent = f->set->descent;
+	f->pattern = FcPatternDuplicate(pattern);
+
+	f->ascent = f->match->ascent;
+	f->descent = f->match->descent;
 	f->lbearing = 0;
-	f->rbearing = f->set->max_advance_width;
+	f->rbearing = f->match->max_advance_width;
 
-	f->height = f->set->height;
+	f->height = f->match->height;
 	f->width = f->lbearing + f->rbearing;
 
 	return 0;
@@ -2327,6 +2537,9 @@ xloadfonts(char *fontstr, int fontsize) {
 		}
 	}
 
+	FcConfigSubstitute(0, pattern, FcMatchPattern);
+	FcDefaultSubstitute(pattern);
+
 	if(xloadfont(&dc.font, pattern))
 		die("st: can't open font %s\n", fontstr);
 
@@ -2334,37 +2547,69 @@ xloadfonts(char *fontstr, int fontsize) {
 	xw.cw = dc.font.width;
 	xw.ch = dc.font.height;
 
-	FcPatternDel(pattern, FC_WEIGHT);
-	FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
-	if(xloadfont(&dc.bfont, pattern))
-		die("st: can't open font %s\n", fontstr);
-
 	FcPatternDel(pattern, FC_SLANT);
 	FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
-	if(xloadfont(&dc.ibfont, pattern))
+	if(xloadfont(&dc.ifont, pattern))
 		die("st: can't open font %s\n", fontstr);
 
 	FcPatternDel(pattern, FC_WEIGHT);
-	if(xloadfont(&dc.ifont, pattern))
+	FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
+	if(xloadfont(&dc.ibfont, pattern))
+		die("st: can't open font %s\n", fontstr);
+
+	FcPatternDel(pattern, FC_SLANT);
+	FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
+	if(xloadfont(&dc.bfont, pattern))
 		die("st: can't open font %s\n", fontstr);
 
 	FcPatternDestroy(pattern);
 }
 
 void
-xzoom(const Arg *arg)
-{
+xunloadfonts(void) {
+	int i, ip;
+
+	/*
+	 * Free the loaded fonts in the font cache. This is done backwards
+	 * from the frccur.
+	 */
+	for(i = 0, ip = frccur; i < frclen; i++, ip--) {
+		if(ip < 0)
+			ip = LEN(frc) - 1;
+		XftFontClose(xw.dpy, frc[ip].font);
+	}
+	frccur = -1;
+	frclen = 0;
+
+	XftFontClose(xw.dpy, dc.font.match);
+	FcPatternDestroy(dc.font.pattern);
+	FcFontSetDestroy(dc.font.set);
+	XftFontClose(xw.dpy, dc.bfont.match);
+	FcPatternDestroy(dc.bfont.pattern);
+	FcFontSetDestroy(dc.bfont.set);
+	XftFontClose(xw.dpy, dc.ifont.match);
+	FcPatternDestroy(dc.ifont.pattern);
+	FcFontSetDestroy(dc.ifont.set);
+	XftFontClose(xw.dpy, dc.ibfont.match);
+	FcPatternDestroy(dc.ibfont.pattern);
+	FcFontSetDestroy(dc.ibfont.set);
+}
+
+void
+xzoom(const Arg *arg) {
+	xunloadfonts();
 	xloadfonts(usedfont, usedfontsize + arg->i);
 	cresize(0, 0);
-	draw();
+	redraw(0);
 }
 
 void
 xinit(void) {
 	XSetWindowAttributes attrs;
+	XGCValues gcvalues;
 	Cursor cursor;
 	Window parent;
-	int sw, sh, major, minor;
+	int sw, sh;
 
 	if(!(xw.dpy = XOpenDisplay(NULL)))
 		die("Can't open display\n");
@@ -2372,6 +2617,9 @@ xinit(void) {
 	xw.vis = XDefaultVisual(xw.dpy, xw.scr);
 
 	/* font */
+	if(!FcInit())
+		die("Could not init fontconfig.\n");
+
 	usedfont = (opt_font == NULL)? font : opt_font;
 	xloadfonts(usedfont, 0);
 
@@ -2392,12 +2640,13 @@ xinit(void) {
 		xw.w = xw.fw;
 	} else {
 		/* window - default size */
-		xw.h = 2*borderpx + term.row * xw.ch;
-		xw.w = 2*borderpx + term.col * xw.cw;
+		xw.h = 2 * borderpx + term.row * xw.ch;
+		xw.w = 2 * borderpx + term.col * xw.cw;
 		xw.fx = 0;
 		xw.fy = 0;
 	}
 
+	/* Events */
 	attrs.background_pixel = dc.col[defaultbg].pixel;
 	attrs.border_pixel = dc.col[defaultbg].pixel;
 	attrs.bit_gravity = NorthWestGravity;
@@ -2406,7 +2655,8 @@ xinit(void) {
 		| ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
 	attrs.colormap = xw.cmap;
 
-	parent = opt_embed ? strtol(opt_embed, NULL, 0) : XRootWindow(xw.dpy, xw.scr);
+	parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
+			XRootWindow(xw.dpy, xw.scr);
 	xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
 			xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
 			xw.vis,
@@ -2414,19 +2664,35 @@ xinit(void) {
 			| CWColormap,
 			&attrs);
 
-	/* double buffering */
-	if(!XdbeQueryExtension(xw.dpy, &major, &minor))
-		die("Xdbe extension is not present\n");
-	xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win, XdbeCopied);
+	memset(&gcvalues, 0, sizeof(gcvalues));
+	gcvalues.graphics_exposures = False;
+	dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
+			&gcvalues);
+	xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
+			DefaultDepth(xw.dpy, xw.scr));
+	XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
+	XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
 
 	/* Xft rendering context */
 	xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
 
 	/* input methods */
-	xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
+	if((xw.xim =  XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
+		XSetLocaleModifiers("@im=local");
+		if((xw.xim =  XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
+			XSetLocaleModifiers("@im=");
+			if((xw.xim = XOpenIM(xw.dpy,
+					NULL, NULL, NULL)) == NULL) {
+				die("XOpenIM failed. Could not open input"
+					" device.\n");
+			}
+		}
+	}
 	xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
 					   | XIMStatusNothing, XNClientWindow, xw.win,
 					   XNFocusWindow, xw.win, NULL);
+	if(xw.xic == NULL)
+		die("XCreateIC failed. Could not obtain input method.\n");
 
 	/* white cursor, black outline */
 	cursor = XCreateFontCursor(xw.dpy, XC_xterm);
@@ -2448,13 +2714,22 @@ xinit(void) {
 void
 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
 	int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
-	    width = charlen * xw.cw;
+	    width = charlen * xw.cw, xp, i;
+	int frp, frcflags;
+	int u8fl, u8fblen, u8cblen, doesexist;
+	char *u8c, *u8fs;
+	long u8char;
 	Font *font = &dc.font;
-	XGlyphInfo extents;
+	FcResult fcres;
+	FcPattern *fcpattern, *fontpattern;
+	FcFontSet *fcsets[] = { NULL };
+	FcCharSet *fccharset;
 	Colour *fg = &dc.col[base.fg], *bg = &dc.col[base.bg],
 		 *temp, revfg, revbg;
 	XRenderColor colfg, colbg;
 
+	frcflags = FRC_NORMAL;
+
 	if(base.mode & ATTR_BOLD) {
 		if(BETWEEN(base.fg, 0, 7)) {
 			/* basic system colors */
@@ -2473,12 +2748,17 @@ xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
 		 *	252 - 255 – brightest colors in greyscale
 		 */
 		font = &dc.bfont;
+		frcflags = FRC_BOLD;
 	}
 
-	if(base.mode & ATTR_ITALIC)
+	if(base.mode & ATTR_ITALIC) {
 		font = &dc.ifont;
-	if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD))
+		frcflags = FRC_ITALIC;
+	}
+	if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
 		font = &dc.ibfont;
+		frcflags = FRC_ITALICBOLD;
+	}
 
 	if(IS_SET(MODE_REVERSE)) {
 		if(fg == &dc.col[defaultfg]) {
@@ -2504,30 +2784,142 @@ xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
 		}
 	}
 
-	if(base.mode & ATTR_REVERSE)
-		temp = fg, fg = bg, bg = temp;
-
-	XftTextExtentsUtf8(xw.dpy, font->set, (FcChar8 *)s, bytelen,
-			&extents);
-	width = extents.xOff;
+	if(base.mode & ATTR_REVERSE) {
+		temp = fg;
+		fg = bg;
+		bg = temp;
+	}
 
 	/* Intelligent cleaning up of the borders. */
 	if(x == 0) {
 		xclear(0, (y == 0)? 0 : winy, borderpx,
-			winy + xw.ch + (y == term.row-1)? xw.h : 0);
+			winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
 	}
-	if(x + charlen >= term.col-1) {
+	if(x + charlen >= term.col) {
 		xclear(winx + width, (y == 0)? 0 : winy, xw.w,
-			(y == term.row-1)? xw.h : (winy + xw.ch));
+			((y >= term.row-1)? xw.h : (winy + xw.ch)));
 	}
 	if(y == 0)
 		xclear(winx, 0, winx + width, borderpx);
 	if(y == term.row-1)
 		xclear(winx, winy + xw.ch, winx + width, xw.h);
 
+	/* Clean up the region we want to draw to. */
 	XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
+
+	fcsets[0] = font->set;
+	for(xp = winx; bytelen > 0;) {
+		/*
+		 * Search for the range in the to be printed string of glyphs
+		 * that are in the main font. Then print that range. If
+		 * some glyph is found that is not in the font, do the
+		 * fallback dance.
+		 */
+		u8fs = s;
+		u8fblen = 0;
+		u8fl = 0;
+		for(;;) {
+			u8c = s;
+			u8cblen = utf8decode(s, &u8char);
+			s += u8cblen;
+			bytelen -= u8cblen;
+
+			doesexist = XftCharIndex(xw.dpy, font->match, u8char);
+			if(!doesexist || bytelen <= 0) {
+				if(bytelen <= 0) {
+					if(doesexist) {
+						u8fl++;
+						u8fblen += u8cblen;
+					}
+				}
+
+				if(u8fl > 0) {
+					XftDrawStringUtf8(xw.draw, fg,
+							font->match, xp,
+							winy + font->ascent,
+							(FcChar8 *)u8fs,
+							u8fblen);
+					xp += font->width * u8fl;
+				}
+				break;
+			}
+
+			u8fl++;
+			u8fblen += u8cblen;
+		}
+		if(doesexist)
+			break;
+
+		frp = frccur;
+		/* Search the font cache. */
+		for(i = 0; i < frclen; i++, frp--) {
+			if(frp <= 0)
+				frp = LEN(frc) - 1;
+
+			if(frc[frp].c == u8char
+					&& frc[frp].flags == frcflags) {
+				break;
+			}
+		}
+
+		/* Nothing was found. */
+		if(i >= frclen) {
+			/*
+			 * Nothing was found in the cache. Now use
+			 * some dozen of Fontconfig calls to get the
+			 * font for one single character.
+			 */
+			fcpattern = FcPatternDuplicate(font->pattern);
+			fccharset = FcCharSetCreate();
+
+			FcCharSetAddChar(fccharset, u8char);
+			FcPatternAddCharSet(fcpattern, FC_CHARSET,
+					fccharset);
+			FcPatternAddBool(fcpattern, FC_SCALABLE,
+					FcTrue);
+
+			FcConfigSubstitute(0, fcpattern,
+					FcMatchPattern);
+			FcDefaultSubstitute(fcpattern);
+
+			fontpattern = FcFontSetMatch(0, fcsets,
+					FcTrue, fcpattern, &fcres);
+
+			/*
+			 * Overwrite or create the new cache entry
+			 * entry.
+			 */
+			frccur++;
+			frclen++;
+			if(frccur >= LEN(frc))
+				frccur = 0;
+			if(frclen > LEN(frc)) {
+				frclen = LEN(frc);
+				XftFontClose(xw.dpy, frc[frccur].font);
+			}
+
+			frc[frccur].font = XftFontOpenPattern(xw.dpy,
+					fontpattern);
+			frc[frccur].c = u8char;
+			frc[frccur].flags = frcflags;
+
+			FcPatternDestroy(fcpattern);
+			FcCharSetDestroy(fccharset);
+
+			frp = frccur;
+		}
+
+		XftDrawStringUtf8(xw.draw, fg, frc[frp].font,
+				xp, winy + frc[frp].font->ascent,
+				(FcChar8 *)u8c, u8cblen);
+
+		xp += font->width;
+	}
+
+	/*
 	XftDrawStringUtf8(xw.draw, fg, font->set, winx,
 			winy + font->ascent, (FcChar8 *)s, bytelen);
+	*/
 
 	if(base.mode & ATTR_UNDERLINE) {
 		XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
@@ -2570,27 +2962,42 @@ xdrawcursor(void) {
 	}
 }
 
+
+void
+xsettitle(char *p) {
+	XTextProperty prop;
+
+	Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
+			&prop);
+	XSetWMName(xw.dpy, xw.win, &prop);
+}
+
 void
 xresettitle(void) {
-	XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
+	xsettitle(opt_title ? opt_title : "st");
 }
 
 void
-redraw(void) {
-	struct timespec tv = {0, REDRAW_TIMEOUT * 1000};
+redraw(int timeout) {
+	struct timespec tv = {0, timeout * 1000};
 
 	tfulldirt();
 	draw();
-	XSync(xw.dpy, False); /* necessary for a good tput flash */
-	nanosleep(&tv, NULL);
+
+	if(timeout > 0) {
+		nanosleep(&tv, NULL);
+		XSync(xw.dpy, False); /* necessary for a good tput flash */
+	}
 }
 
 void
 draw(void) {
-	XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
-
 	drawregion(0, 0, term.col, term.row);
-	XdbeSwapBuffers(xw.dpy, swpinfo, 1);
+	XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
+			xw.h, 0, 0);
+	XSetForeground(xw.dpy, dc.gc,
+			dc.col[IS_SET(MODE_REVERSE)?
+				defaultfg : defaultbg].pixel);
 }
 
 void
@@ -2598,10 +3005,11 @@ drawregion(int x1, int y1, int x2, int y2) {
 	int ic, ib, x, y, ox, sl;
 	Glyph base, new;
 	char buf[DRAW_BUF_SIZ];
-	bool ena_sel = sel.bx != -1, alt = IS_SET(MODE_ALTSCREEN) != 0;
+	bool ena_sel = sel.bx != -1;
 
-	if((sel.alt != 0) ^ alt)
+	if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
 		ena_sel = 0;
+
 	if(!(xw.state & WIN_VISIBLE))
 		return;
 
@@ -2628,6 +3036,7 @@ drawregion(int x1, int y1, int x2, int y2) {
 					ox = x;
 					base = new;
 				}
+
 				sl = utf8size(new.c);
 				memcpy(buf+ib, new.c, sl);
 				ib += sl;
@@ -2648,6 +3057,7 @@ expose(XEvent *ev) {
 		if(!e->count)
 			xw.state &= ~WIN_REDRAW;
 	}
+	redraw(0);
 }
 
 void
@@ -2678,6 +3088,11 @@ xseturgency(int add) {
 
 void
 focus(XEvent *ev) {
+	XFocusChangeEvent *e = &ev->xfocus;
+
+	if(e->mode == NotifyGrab)
+		return;
+
 	if(ev->type == FocusIn) {
 		XSetICFocus(xw.xic);
 		xw.state |= WIN_FOCUSED;
@@ -2688,29 +3103,64 @@ focus(XEvent *ev) {
 	}
 }
 
+inline bool
+match(uint mask, uint state) {
+	state &= ~(ignoremod);
+
+	if(mask == XK_NO_MOD && state)
+		return false;
+	if(mask != XK_ANY_MOD && mask != XK_NO_MOD && !state)
+		return false;
+	if((state & mask) != state)
+		return false;
+	return true;
+}
+
+void
+numlock(const Arg *dummy) {
+	term.numlock ^= 1;
+}
+
 char*
 kmap(KeySym k, uint state) {
 	uint mask;
 	Key *kp;
+	int i;
+
+	/* Check for mapped keys out of X11 function keys. */
+	for(i = 0; i < LEN(mappedkeys); i++) {
+		if(mappedkeys[i] == k)
+			break;
+	}
+	if(i == LEN(mappedkeys)) {
+		if((k & 0xFFFF) < 0xFD00)
+			return NULL;
+	}
 
-	state &= ~Mod2Mask;
 	for(kp = key; kp < key + LEN(key); kp++) {
 		mask = kp->mask;
 
 		if(kp->k != k)
 			continue;
-		if((state & mask) != mask &&
-				(mask == XK_NO_MOD && state)) {
+
+		if(!match(mask, state))
 			continue;
-		}
-		if((kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) ||
-				(kp->appkey > 0 && !IS_SET(MODE_APPKEYPAD))) {
+
+		if(kp->appkey > 0) {
+			if(!IS_SET(MODE_APPKEYPAD))
+				continue;
+			if(term.numlock && kp->appkey == 2)
+				continue;
+		} else if(kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) {
 			continue;
 		}
+
 		if((kp->appcursor < 0 && IS_SET(MODE_APPCURSOR)) ||
-				(kp->appcursor > 0 && !IS_SET(MODE_APPCURSOR))) {
+				(kp->appcursor > 0
+				 && !IS_SET(MODE_APPCURSOR))) {
 			continue;
 		}
+
 		if((kp->crlf < 0 && IS_SET(MODE_CRLF)) ||
 				(kp->crlf > 0 && !IS_SET(MODE_CRLF))) {
 			continue;
@@ -2718,6 +3168,7 @@ kmap(KeySym k, uint state) {
 
 		return kp->s;
 	}
+
 	return NULL;
 }
 
@@ -2726,21 +3177,20 @@ kpress(XEvent *ev) {
 	XKeyEvent *e = &ev->xkey;
 	KeySym ksym;
 	char xstr[31], buf[32], *customkey, *cp = buf;
-	int len, i;
+	int len;
 	Status status;
+	Shortcut *bp;
 
-	if (IS_SET(MODE_KBDLOCK))
+	if(IS_SET(MODE_KBDLOCK))
 		return;
 
 	len = XmbLookupString(xw.xic, e, xstr, sizeof(xstr), &ksym, &status);
-
+	e->state &= ~Mod2Mask;
 	/* 1. shortcuts */
-	for(i = 0; i < LEN(shortcuts); i++) {
-		if((ksym == shortcuts[i].keysym)
-				&& (CLEANMASK(shortcuts[i].mod) == \
-					CLEANMASK(e->state))
-				&& shortcuts[i].func) {
-			shortcuts[i].func(&(shortcuts[i].arg));
+	for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
+		if(ksym == bp->keysym && match(bp->mod, e->state)) {
+			bp->func(&(bp->arg));
+			return;
 		}
 	}
 
@@ -2753,7 +3203,7 @@ kpress(XEvent *ev) {
 		if(len == 0)
 			return;
 
-		if (len == 1 && e->state & Mod1Mask)
+		if(len == 1 && e->state & Mod1Mask)
 			*cp++ = '\033';
 
 		memcpy(cp, xstr, len);
@@ -2768,8 +3218,10 @@ kpress(XEvent *ev) {
 
 void
 cmessage(XEvent *e) {
-	/* See xembed specs
-	   http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html */
+	/*
+	 * See xembed specs
+	 *  http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
+	 */
 	if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
 		if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
 			xw.state |= WIN_FOCUSED;
@@ -2785,8 +3237,7 @@ cmessage(XEvent *e) {
 }
 
 void
-cresize(int width, int height)
-{
+cresize(int width, int height) {
 	int col, row;
 
 	if(width != 0)
@@ -2794,8 +3245,8 @@ cresize(int width, int height)
 	if(height != 0)
 		xw.h = height;
 
-	col = (xw.w - 2*borderpx) / xw.cw;
-	row = (xw.h - 2*borderpx) / xw.ch;
+	col = (xw.w - 2 * borderpx) / xw.cw;
+	row = (xw.h - 2 * borderpx) / xw.ch;
 
 	tresize(col, row);
 	xresize(col, row);
@@ -2814,10 +3265,12 @@ void
 run(void) {
 	XEvent ev;
 	fd_set rfd;
-	int xfd = XConnectionNumber(xw.dpy), i;
-	struct timeval drawtimeout, *tv = NULL;
+	int xfd = XConnectionNumber(xw.dpy), xev;
+	struct timeval drawtimeout, *tv = NULL, now, last;
+
+	gettimeofday(&last, NULL);
 
-	for(i = 0;; i++) {
+	for(xev = actionfps;;) {
 		FD_ZERO(&rfd);
 		FD_SET(cmdfd, &rfd);
 		FD_SET(xfd, &rfd);
@@ -2827,35 +3280,36 @@ run(void) {
 			die("select failed: %s\n", SERRNO);
 		}
 
-		/*
-		 * Stop after a certain number of reads so the user does not
-		 * feel like the system is stuttering.
-		 */
-		if(i < 1000 && FD_ISSET(cmdfd, &rfd)) {
+		gettimeofday(&now, NULL);
+		drawtimeout.tv_sec = 0;
+		drawtimeout.tv_usec = (1000/xfps) * 1000;
+		tv = &drawtimeout;
+
+		if(FD_ISSET(cmdfd, &rfd))
 			ttyread();
 
-			/*
-			 * Just wait a bit so it isn't disturbing the
-			 * user and the system is able to write something.
-			 */
-			drawtimeout.tv_sec = 0;
-			drawtimeout.tv_usec = 5;
-			tv = &drawtimeout;
-			continue;
-		}
-		i = 0;
-		tv = NULL;
+		if(FD_ISSET(xfd, &rfd))
+			xev = actionfps;
 
-		while(XPending(xw.dpy)) {
-			XNextEvent(xw.dpy, &ev);
-			if(XFilterEvent(&ev, None))
-				continue;
-			if(handler[ev.type])
-				(handler[ev.type])(&ev);
-		}
+		if(TIMEDIFF(now, last) > \
+				(xev ? (1000/xfps) : (1000/actionfps))) {
+			while(XPending(xw.dpy)) {
+				XNextEvent(xw.dpy, &ev);
+				if(XFilterEvent(&ev, None))
+					continue;
+				if(handler[ev.type])
+					(handler[ev.type])(&ev);
+			}
 
-		draw();
-		XFlush(xw.dpy);
+			draw();
+			XFlush(xw.dpy);
+			last = now;
+
+			if(xev && !FD_ISSET(xfd, &rfd))
+				xev--;
+			if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd))
+				tv = NULL;
+		}
 	}
 }