cleanup. refactored dirt-related function.
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			@ -259,6 +259,7 @@ static void tsetattr(int*, int);
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static void tsetchar(char*);
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static void tsetscroll(int, int);
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static void tswapscreen(void);
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static void tsetdirt(int, int);
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static void tfulldirt(void);
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static void ttynew(void);
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			@ -446,8 +447,8 @@ utf8size(char *s) {
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void
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selinit(void) {
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	sel.tclick1.tv_sec = 0;
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	sel.tclick1.tv_usec = 0;
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	memset(&sel.tclick1, 0, sizeof(sel.tclick1));
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	memset(&sel.tclick2, 0, sizeof(sel.tclick2));
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	sel.mode = 0;
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	sel.bx = -1;
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	sel.clip = NULL;
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			@ -520,8 +521,7 @@ bpress(XEvent *e) {
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		mousereport(e);
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	else if(e->xbutton.button == Button1) {
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		if(sel.bx != -1)
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			for(int i=sel.b.y; i<=sel.e.y; i++)
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				term.dirty[i] = 1;
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			tsetdirt(sel.b.y, sel.e.y);
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		sel.mode = 1;
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		sel.ex = sel.bx = X2COL(e->xbutton.x);
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		sel.ey = sel.by = Y2ROW(e->xbutton.y);
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			@ -531,21 +531,28 @@ bpress(XEvent *e) {
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void
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selcopy(void) {
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	char *str, *ptr;
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	int x, y, sz, sl, ls = 0;
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	int x, y, bufsize, is_selected = 0;
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	if(sel.bx == -1)
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		str = NULL;
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	else {
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		sz = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
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		ptr = str = malloc(sz);
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		bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
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		ptr = str = malloc(bufsize);
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		/* append every set & selected glyph to the selection */
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		for(y = 0; y < term.row; y++) {
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			for(x = 0; x < term.col; x++)
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				if(term.line[y][x].state & GLYPH_SET && (ls = selected(x, y))) {
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					sl = utf8size(term.line[y][x].c);
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					memcpy(ptr, term.line[y][x].c, sl);
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					ptr += sl;
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			for(x = 0; x < term.col; x++) {
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				is_selected = selected(x, y);
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				if((term.line[y][x].state & GLYPH_SET) && is_selected) {
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					int size = utf8size(term.line[y][x].c);
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					memcpy(ptr, term.line[y][x].c, size);
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					ptr += size;
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				}
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			if(ls && y < sel.e.y)
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			}
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			/* \n at the end of every selected line except for the last one */
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			if(is_selected && y < sel.e.y)
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				*ptr++ = '\n';
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		}
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		*ptr = 0;
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			@ -687,8 +694,7 @@ bmotion(XEvent *e) {
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		if(oldey != sel.ey || oldex != sel.ex) {
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			int starty = MIN(oldey, sel.ey);
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			int endy = MAX(oldey, sel.ey);
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			for(int i = starty; i <= endy; i++)
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				term.dirty[i] = 1;
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			tsetdirt(starty, endy);
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			draw();
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		}
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	}
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			@ -813,13 +819,23 @@ ttyresize(int x, int y) {
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}
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void
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tfulldirt(void)
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tsetdirt(int top, int bot)
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{
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	int i;
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	for(i = 0; i < term.row; i++)
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	LIMIT(top, 0, term.row-1);
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	LIMIT(bot, 0, term.row-1);
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	for(i = top; i <= bot; i++)
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		term.dirty[i] = 1;
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}
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void
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tfulldirt(void)
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{
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	tsetdirt(0, term.row-1);
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}
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void
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tcursor(int mode) {
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	static TCursor c;
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