Rework UI code for multi-channel

Tags are now permanently assigned (and I'm betting on never needing more
than 256 of them) and the UI maps tags to a linked list of views for
easy reordering and removal. Currently, views can only be added. Views
don't have a topic window until they need one. All UI code wants to be
functional reactive.

Beeping is temporarily removed until message priorities (status,
message, ping) can be added to the UI. At that point spawning
notify-send should also be possible. Priorities will also help with
unnecessary markers, which will not appear for status messages.

The tab system is now used to send QUIT and NICK messages to all the
relevant tags. Verbose output now goes to its own tag, and sending to
it sends raw IRC.

IRC colors are now listed in chat.h and handler functions for numeric
replies have real names. The color algorithm now uses a real hash
function for hopefully better results. QUIT, PART and KICK messages are
scanned for URLs.

1 files changed, 61 insertions, 54 deletions

diff --git a/handle.c b/handle.c
index 29b354c..4d2d4b1 100644
--- a/handle.c
+++ b/handle.c
@@ -23,14 +23,17 @@
 
 #include "chat.h"
 
-static int color(const char *s) {
-	if (!s) return 0;
-	int x = 0;
-	for (; s[0]; ++s) {
-		x ^= s[0];
+// Adapted from <https://github.com/cbreeden/fxhash/blob/master/lib.rs>.
+static int color(const char *str) {
+	if (!str) return IRC_GRAY;
+	uint32_t hash = 0;
+	for (; str[0]; ++str) {
+		hash = (hash << 5) | (hash >> 27);
+		hash ^= str[0];
+		hash *= 0x27220A95;
 	}
-	x &= 15;
-	return (x == 1) ? 0 : x;
+	hash &= IRC_LIGHT_GRAY;
+	return (hash == IRC_BLACK) ? IRC_GRAY : hash;
 }
 
 static char *paramField(char **params) {
@@ -90,44 +93,41 @@ static void handlePing(char *prefix, char *params) {
 	ircFmt("PONG %s\r\n", params);
 }
 
-static void handle432(char *prefix, char *params) {
+static void handleReplyErroneousNickname(char *prefix, char *params) {
 	char *mesg;
 	shift(prefix, NULL, NULL, NULL, params, 3, 0, NULL, NULL, &mesg);
-	uiLog(TAG_DEFAULT, L"You can't use that name here");
-	uiFmt(TAG_DEFAULT, "Sheriff says, \"%s\"", mesg);
-	uiLog(TAG_DEFAULT, L"Type /nick <name> to choose a new one");
+	uiLog(TAG_STATUS, L"You can't use that name here");
+	uiFmt(TAG_STATUS, "Sheriff says, \"%s\"", mesg);
+	uiLog(TAG_STATUS, L"Type /nick <name> to choose a new one");
 }
 
-static void handle001(char *prefix, char *params) {
+static void handleReplyWelcome(char *prefix, char *params) {
 	char *nick;
 	shift(prefix, NULL, NULL, NULL, params, 1, 0, &nick);
 	if (strcmp(nick, self.nick)) selfNick(nick);
-	tabTouch(TAG_DEFAULT, self.nick);
+	tabTouch(TAG_STATUS, self.nick);
 	if (self.join) ircFmt("JOIN %s\r\n", self.join);
-	uiLog(TAG_DEFAULT, L"You have arrived");
+	uiLog(TAG_STATUS, L"You have arrived");
 }
 
-static void handle372(char *prefix, char *params) {
+static void handleReplyMOTD(char *prefix, char *params) {
 	char *mesg;
 	shift(prefix, NULL, NULL, NULL, params, 2, 0, NULL, &mesg);
 	if (mesg[0] == '-' && mesg[1] == ' ') mesg = &mesg[2];
-	uiFmt(TAG_DEFAULT, "%s", mesg);
+	urlScan(TAG_STATUS, mesg);
+	uiFmt(TAG_STATUS, "%s", mesg);
 }
 
 static void handleJoin(char *prefix, char *params) {
 	char *nick, *user, *chan;
 	shift(prefix, &nick, &user, NULL, params, 1, 0, &chan);
 	struct Tag tag = tagFor(chan);
-	if (isSelf(nick, user)) {
-		tabTouch(TAG_DEFAULT, chan);
-		uiFocus(tag);
-	} else {
-		tabTouch(tag, nick);
-	}
+	tabTouch(tag, nick);
 	uiFmt(
 		tag, "\3%d%s\3 arrives in \3%d%s\3",
 		color(user), nick, color(chan), chan
 	);
+	if (isSelf(nick, user)) uiViewTag(tag);
 }
 
 static void handlePart(char *prefix, char *params) {
@@ -136,6 +136,7 @@ static void handlePart(char *prefix, char *params) {
 	struct Tag tag = tagFor(chan);
 	(void)(isSelf(nick, user) ? tabClear(tag) : tabRemove(tag, nick));
 	if (mesg) {
+		urlScan(tag, mesg);
 		uiFmt(
 			tag, "\3%d%s\3 leaves \3%d%s\3, \"%s\"",
 			color(user), nick, color(chan), chan, mesg
@@ -154,6 +155,7 @@ static void handleKick(char *prefix, char *params) {
 	struct Tag tag = tagFor(chan);
 	(void)(isSelf(nick, user) ? tabClear(tag) : tabRemove(tag, nick));
 	if (mesg) {
+		urlScan(tag, mesg);
 		uiFmt(
 			tag, "\3%d%s\3 kicks \3%d%s\3 out of \3%d%s\3, \"%s\"",
 			color(user), nick, color(kick), kick, color(chan), chan, mesg
@@ -169,20 +171,23 @@ static void handleKick(char *prefix, char *params) {
 static void handleQuit(char *prefix, char *params) {
 	char *nick, *user, *mesg;
 	shift(prefix, &nick, &user, NULL, params, 0, 1, &mesg);
-	// TODO: Send to tags where nick is in tab.
-	tabRemove(TAG_ALL, nick);
-	if (mesg) {
-		char *quot = (mesg[0] == '"') ? "" : "\"";
-		uiFmt(
-			TAG_DEFAULT, "\3%d%s\3 leaves, %s%s%s",
-			color(user), nick, quot, mesg, quot
-		);
-	} else {
-		uiFmt(TAG_DEFAULT, "\3%d%s\3 leaves", color(user), nick);
+	char *quot = (mesg && mesg[0] == '"') ? "" : "\"";
+	struct Tag tag;
+	while (TAG_NONE.id != (tag = tabTag(nick)).id) {
+		tabRemove(tag, nick);
+		if (mesg) {
+			urlScan(tag, mesg);
+			uiFmt(
+				tag, "\3%d%s\3 leaves, %s%s%s",
+				color(user), nick, quot, mesg, quot
+			);
+		} else {
+			uiFmt(tag, "\3%d%s\3 leaves", color(user), nick);
+		}
 	}
 }
 
-static void handle332(char *prefix, char *params) {
+static void handleReplyTopic(char *prefix, char *params) {
 	char *chan, *topic;
 	shift(prefix, NULL, NULL, NULL, params, 3, 0, NULL, &chan, &topic);
 	struct Tag tag = tagFor(chan);
@@ -207,7 +212,7 @@ static void handleTopic(char *prefix, char *params) {
 	);
 }
 
-static void handle366(char *prefix, char *params) {
+static void handleReplyEndOfNames(char *prefix, char *params) {
 	char *chan;
 	shift(prefix, NULL, NULL, NULL, params, 2, 0, NULL, &chan);
 	ircFmt("WHO %s\r\n", chan);
@@ -219,14 +224,14 @@ static struct {
 	size_t len;
 } who;
 
-static void handle352(char *prefix, char *params) {
+static void handleReplyWho(char *prefix, char *params) {
 	char *chan, *user, *nick;
 	shift(
 		prefix, NULL, NULL, NULL,
 		params, 6, 0, NULL, &chan, &user, NULL, NULL, &nick
 	);
 	struct Tag tag = tagFor(chan);
-	if (!isSelf(nick, user)) tabTouch(tag, nick);
+	tabTouch(tag, nick);
 	size_t cap = sizeof(who.buf) - who.len;
 	int len = snprintf(
 		&who.buf[who.len], cap,
@@ -236,7 +241,7 @@ static void handle352(char *prefix, char *params) {
 	if ((size_t)len < cap) who.len += len;
 }
 
-static void handle315(char *prefix, char *params) {
+static void handleReplyEndOfWho(char *prefix, char *params) {
 	char *chan;
 	shift(prefix, NULL, NULL, NULL, params, 2, 0, NULL, &chan);
 	struct Tag tag = tagFor(chan);
@@ -251,12 +256,14 @@ static void handleNick(char *prefix, char *params) {
 	char *prev, *user, *next;
 	shift(prefix, &prev, &user, NULL, params, 1, 0, &next);
 	if (isSelf(prev, user)) selfNick(next);
-	// TODO: Send to tags where prev is in tab.
-	tabReplace(prev, next);
-	uiFmt(
-		TAG_DEFAULT, "\3%d%s\3 is now known as \3%d%s\3",
-		color(user), prev, color(user), next
-	);
+	struct Tag tag;
+	while (TAG_NONE.id != (tag = tabTag(prev)).id) {
+		tabReplace(tag, prev, next);
+		uiFmt(
+			tag, "\3%d%s\3 is now known as \3%d%s\3",
+			color(user), prev, color(user), next
+		);
+	}
 }
 
 static void handleCTCP(struct Tag tag, char *nick, char *user, char *mesg) {
@@ -288,13 +295,13 @@ static void handlePrivmsg(char *prefix, char *params) {
 		tag, "%c\3%d%c%s%c\17 %s",
 		ping["\17\26"], color(user), self["<("], nick, self[">)"], mesg
 	);
-	if (ping) uiBeep();
+	// TODO: always be beeping.
 }
 
 static void handleNotice(char *prefix, char *params) {
 	char *nick, *user, *chan, *mesg;
 	shift(prefix, &nick, &user, NULL, params, 2, 0, &chan, &mesg);
-	struct Tag tag = TAG_DEFAULT;
+	struct Tag tag = TAG_STATUS;
 	if (user) tag = (strcmp(chan, self.nick) ? tagFor(chan) : tagFor(nick));
 	if (!isSelf(nick, user)) tabTouch(tag, nick);
 	urlScan(tag, mesg);
@@ -308,15 +315,15 @@ static const struct {
 	const char *command;
 	Handler handler;
 } HANDLERS[] = {
-	{ "001", handle001 },
-	{ "315", handle315 },
-	{ "332", handle332 },
-	{ "352", handle352 },
-	{ "366", handle366 },
-	{ "372", handle372 },
-	{ "375", handle372 },
-	{ "432", handle432 },
-	{ "433", handle432 },
+	{ "001", handleReplyWelcome },
+	{ "315", handleReplyEndOfWho },
+	{ "332", handleReplyTopic },
+	{ "352", handleReplyWho },
+	{ "366", handleReplyEndOfNames },
+	{ "372", handleReplyMOTD },
+	{ "375", handleReplyMOTD },
+	{ "432", handleReplyErroneousNickname },
+	{ "433", handleReplyErroneousNickname },
 	{ "JOIN", handleJoin },
 	{ "KICK", handleKick },
 	{ "NICK", handleNick },