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plan9: add "inject" cmd; use tokenize(2) for command parsing

--- a/orca.man

+++ b/orca.man

@@ -254,6 +254,11 @@

 Writes the text at the cursor position or at

 .I X,Y

 if specified.

+.TP

+.B inject FILE [X] [Y]

+Injects a file at the cursor position or at

+.I X,Y

+if specified

 .PP

 .I Orca

 treats

--- a/plan9.c

+++ b/plan9.c

@@ -437,12 +437,14 @@

 }

 static void

-selpaste(void)

+inject(char *filename)

 {

 	Biobuf *b;

-	if ((b = Bopen("/dev/snarf", OREAD)) != nil)

+	if ((b = Bopen(filename, OREAD)) != nil) {

 		selpasteb(b);

+		Bterm(b);

+	}

 }

 static void

@@ -450,12 +452,30 @@

 {

 }

+static Point

+ptclamp(Point p)

+{

+	p.x = MAX(0, MIN((int)field.width-1, p.x));

+	p.y = MAX(0, MIN((int)field.height-1, p.y));

+	return p;

+}

+

 static void

+curmove(int x, int y)

+{

+	Point xy;

+

+	xy = Pt(x, y);

+	cur = ptclamp(addpt(cur, xy));

+	sel.min = ptclamp(addpt(sel.min, xy));

+	sel.max = ptclamp(addpt(sel.max, xy));

+}

+

+static void

 command(char *s, void (*snapshot)(void))

 {

-	char tmp[256];

-	char *a, *b;

-	int x, y;

+	char tmp[256], *argv[8];

+	int argc, x, y;

 	snprint(tmp, sizeof(tmp), "%s", s);

 	s = tmp;

@@ -474,8 +494,9 @@

 		return;

 	}

-	if ((a = strpbrk(s, " \t")) != nil)

-		*a++ = 0;

+	if ((argc = tokenize(tmp, argv, nelem(argv))) < 1)

+		return;

+	s = argv[0];

 	if (s[0] == 'p' && s[1] == 'l') /* play */

 		pause = false;

@@ -487,7 +508,7 @@

 		selcopy();

 	else if (s[0] == 'p' && s[1] == 'a') { /* paste */

 		snapshot();

-		selpaste();

+		inject("/dev/snarf");

 	} else if (s[0] == 'e' && s[1] == 'r') { /* erase */

 		snapshot();

 		selset('.');

@@ -498,8 +519,12 @@

 			putchar('\n');

 		}

 		fflush(stdout);

-	} else if (a != nil) {

-		x = atoi(a);

+	} else if (strcmp(s, "undo") == 0) {

+		undo();

+	} else if (strcmp(s, "redo") == 0) {

+		redo();

+	} else if (argc > 1) {

+		x = atoi(argv[1]);

 		if (s[0] == 'b' && s[1] == 'p') /* bpm */

 			apm = bpm = MAX(1, x);

@@ -512,30 +537,33 @@

 		else if (s[0] == 'r' && s[1] == 'e') /* rewind */

 			tick = MAX(0, tick-x);

 		else if (s[0] == 'i' && s[1] == 'p') /* ip */

-			netdial(a, nil);

+			netdial(argv[1], nil);

 		else if (s[0] == 'u' && s[1] == 'd') /* udp */

-			netdial(nil, a);

+			netdial(nil, argv[1]);

 		else if (s[0] == 'm' && s[1] == 'i') /* midi */

-			midiopen(a);

-		else if (s[0] == 'w' && s[1] == 'r') { /* write:abcd;13;14 */

-			b = a;

-			x = cur.x;

-			y = cur.y;

-			if ((a = strpbrk(b, " \t")) != nil) {

-				*a++ = 0;

-				x = atoi(a);

-				if ((a = strpbrk(a, " \t")) != nil)

-					y = atoi(++a);

+			midiopen(argv[1]);

+		else if (s[0] == 'i' && s[1] == 'n' && argc > 1) {

+			snapshot();

+			if (argc > 2) {

+				cur.x = 0;

+				sel.min.x = 0;

+				curmove(atoi(argv[2]), 0);

 			}

-			for (; *b != 0; x++, b++)

-				fieldset(x, y, *b);

+			if (argc > 3) {

+				cur.y = 0;

+				sel.min.y = 0;

+				curmove(0, atoi(argv[3]));

+			}

+			inject(argv[1]);

+		} else if (s[0] == 'w' && s[1] == 'r') { /* write abcd 13 14 */

+			s = argv[1];

+			x = argc > 2 ? atoi(argv[2]) : cur.x;

+			y = argc > 3 ? atoi(argv[3]) : cur.y;

+			for (; *s != 0; x++, s++)

+				fieldset(x, y, *s);

 		}

-		/* FIXME color, find, select, inject, write, time */

-	} else if (strcmp(s, "undo") == 0) {

-		undo();

-	} else if (strcmp(s, "redo") == 0) {

-		redo();

+		/* FIXME color, find, select, time */

 	}

 }

@@ -972,26 +1000,7 @@

 	return 0;

 }

-static Point

-ptclamp(Point p)

-{

-	p.x = MAX(0, MIN((int)field.width-1, p.x));

-	p.y = MAX(0, MIN((int)field.height-1, p.y));

-	return p;

-}

-

 static void

-curmove(int x, int y)

-{

-	Point xy;

-

-	xy = Pt(x, y);

-	cur = ptclamp(addpt(cur, xy));

-	sel.min = ptclamp(addpt(sel.min, xy));

-	sel.max = ptclamp(addpt(sel.max, xy));

-}

-

-static void

 selmove(int x, int y)

 {

 	int i;

@@ -1398,7 +1407,7 @@

 				selcopy();

 				selset('.');

 			} else if (m.buttons == 5) { /* paste */

-				selpaste();

+				inject("/dev/snarf");

 			} else if (m.buttons == 4) { /* menu */

 				menu3i[Menu3dotstyle] = styles[(dotstyle+1) % Numstyles].dot.menu;

 				menu3i[Menu3rulerstyle] = styles[(rulerstyle+1) % Numstyles].ruler.menu;

@@ -1529,7 +1538,7 @@

 				break;

 			case 0x16: /* C-v */

 				snapshot();

-				selpaste();

+				inject("/dev/snarf");

 				break;

 			case '[':

 				rulers.x = MAX(4, rulers.x-1);