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, 181 insertions, 170 deletions

diff --git a/ui.c b/ui.c
index 844e777..748235c 100644
--- a/ui.c
+++ b/ui.c
@@ -21,13 +21,16 @@
 #include <locale.h>
 #include <stdarg.h>
 #include <stdbool.h>
-#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <sysexits.h>
 #include <wchar.h>
 #include <wctype.h>
 
+#ifndef A_ITALIC
+#define A_ITALIC A_NORMAL
+#endif
+
 #include "chat.h"
 #undef uiFmt
 
@@ -35,20 +38,6 @@
 #define MAX(a, b) ((a) > (b) ? (a) : (b))
 
 #define CTRL(c)   ((c) & 037)
-#define UNCTRL(c) ((c) + '@')
-
-#ifndef A_ITALIC
-#define A_ITALIC A_NORMAL
-#endif
-
-static void focusEnable(void) {
-	printf("\33[?1004h");
-	fflush(stdout);
-}
-static void focusDisable(void) {
-	printf("\33[?1004l");
-	fflush(stdout);
-}
 
 static void colorInit(void) {
 	start_color();
@@ -81,52 +70,83 @@ static short pair8(short pair) {
 	return (pair & 0x70) >> 1 | (pair & 0x07);
 }
 
-static const int TOPIC_COLS = 512;
-static const int INPUT_COLS = 512;
-static const int LOG_LINES = 100;
+static const int LOG_LINES   = 256;
+static const int TOPIC_COLS  = 512;
+static const int INPUT_COLS  = 512;
+
+static struct View {
+	struct Tag tag;
+	WINDOW *topic;
+	WINDOW *log;
+	int scroll;
+	bool mark;
+	struct View *prev;
+	struct View *next;
+} *viewHead, *viewTail;
+
+static void viewAppend(struct View *view) {
+	if (viewTail) viewTail->next = view;
+	view->prev = viewTail;
+	view->next = NULL;
+	viewTail = view;
+	if (!viewHead) viewHead = view;
+}
 
+static int logHeight(const struct View *view) {
+	return LINES - (view->topic ? 2 : 0) - 2;
+}
+static int lastLogLine(void) {
+	return LOG_LINES - 1;
+}
 static int lastLine(void) {
 	return LINES - 1;
 }
 static int lastCol(void) {
 	return COLS - 1;
 }
-static int logHeight(void) {
-	return LINES - 4;
-}
-
-struct View {
-	WINDOW *topic;
-	WINDOW *log;
-	int scroll;
-	bool mark;
-};
 
 static struct {
 	bool hide;
 	WINDOW *input;
-	struct Tag tag;
-	struct View views[TAGS_LEN];
-	size_t len;
+	struct View *view;
+	struct View *tags[TAGS_LEN];
 } ui;
 
+static struct View *viewTag(struct Tag tag) {
+	struct View *view = ui.tags[tag.id];
+	if (view) return view;
+
+	view = calloc(1, sizeof(*view));
+	if (!view) err(EX_OSERR, "calloc");
+
+	view->tag = tag;
+	view->log = newpad(LOG_LINES, COLS);
+	wsetscrreg(view->log, 0, lastLogLine());
+	scrollok(view->log, true);
+	wmove(view->log, lastLogLine() - logHeight(view), 0);
+	view->scroll = LOG_LINES;
+
+	viewAppend(view);
+	ui.tags[tag.id] = view;
+	return view;
+}
+
 void uiInit(void) {
 	setlocale(LC_CTYPE, "");
 	initscr();
 	cbreak();
 	noecho();
 
-	focusEnable();
 	colorInit();
-
-	ui.tag = TAG_DEFAULT;
+	termMode(TERM_FOCUS, true);
 
 	ui.input = newpad(2, INPUT_COLS);
 	mvwhline(ui.input, 0, 0, ACS_HLINE, INPUT_COLS);
 	wmove(ui.input, 1, 0);
-
 	keypad(ui.input, true);
 	nodelay(ui.input, true);
+
+	ui.view = viewTag(TAG_STATUS);
 }
 
 void uiHide(void) {
@@ -136,54 +156,34 @@ void uiHide(void) {
 
 void uiExit(void) {
 	uiHide();
-	focusDisable();
+	termMode(TERM_FOCUS, false);
 	printf(
 		"This program is AGPLv3 free software!\n"
 		"The source is available at <" SOURCE_URL ">.\n"
 	);
 }
 
-static struct View *uiView(struct Tag tag) {
-	struct View *view = &ui.views[tag.id];
-	if (view->log) return view;
-
-	view->topic = newpad(2, TOPIC_COLS);
-	mvwhline(view->topic, 1, 0, ACS_HLINE, TOPIC_COLS);
-
-	view->log = newpad(LOG_LINES, COLS);
-	wsetscrreg(view->log, 0, LOG_LINES - 1);
-	scrollok(view->log, true);
-	wmove(view->log, LOG_LINES - logHeight() - 1, 0);
-
-	view->scroll = LOG_LINES;
-	view->mark = false;
-
-	if (tag.id >= ui.len) ui.len = tag.id + 1;
-	return view;
-}
-
 static void uiResize(void) {
-	for (size_t i = 0; i < ui.len; ++i) {
-		struct View *view = &ui.views[i];
-		if (!view->log) continue;
+	for (struct View *view = viewHead; view; view = view->next) {
 		wresize(view->log, LOG_LINES, COLS);
-		wmove(view->log, LOG_LINES - 1, COLS - 1);
+		wmove(view->log, lastLogLine(), lastCol());
 	}
 }
 
 void uiDraw(void) {
 	if (ui.hide) return;
-	struct View *view = uiView(ui.tag);
-	pnoutrefresh(
-		view->topic,
-		0, 0,
-		0, 0,
-		1, lastCol()
-	);
+	if (ui.view->topic) {
+		pnoutrefresh(
+			ui.view->topic,
+			0, 0,
+			0, 0,
+			1, lastCol()
+		);
+	}
 	pnoutrefresh(
-		view->log,
-		view->scroll - logHeight(), 0,
-		2, 0,
+		ui.view->log,
+		ui.view->scroll - logHeight(ui.view), 0,
+		(ui.view->topic ? 2 : 0), 0,
 		lastLine() - 2, lastCol()
 	);
 	int _, x;
@@ -201,37 +201,51 @@ static void uiRedraw(void) {
 	clearok(curscr, true);
 }
 
-void uiFocus(struct Tag tag) {
-	struct View *view = uiView(ui.tag);
-	view->mark = true;
-	view = uiView(tag);
-	view->mark = false;
-	touchwin(view->topic);
+static void uiView(struct View *view) {
+	if (view->topic) touchwin(view->topic);
 	touchwin(view->log);
-	ui.tag = tag;
+	view->mark = false;
+	ui.view->mark = true;
+	ui.view = view;
 }
 
-void uiBeep(void) {
-	beep(); // always be beeping
+void uiViewTag(struct Tag tag) {
+	uiView(viewTag(tag));
 }
 
-static const short IRC_COLORS[16] = {
-	8 + COLOR_WHITE,   // white
-	0 + COLOR_BLACK,   // black
-	0 + COLOR_BLUE,    // blue
-	0 + COLOR_GREEN,   // green
-	8 + COLOR_RED,     // red
-	0 + COLOR_RED,     // brown
-	0 + COLOR_MAGENTA, // magenta
-	0 + COLOR_YELLOW,  // orange
-	8 + COLOR_YELLOW,  // yellow
-	8 + COLOR_GREEN,   // light green
-	0 + COLOR_CYAN,    // cyan
-	8 + COLOR_CYAN,    // light cyan
-	8 + COLOR_BLUE,    // light blue
-	8 + COLOR_MAGENTA, // pink
-	8 + COLOR_BLACK,   // gray
-	0 + COLOR_WHITE,   // light gray
+void uiViewNum(int num) {
+	if (num < 0) {
+		for (struct View *view = viewTail; view; view = view->prev) {
+			if (++num) continue;
+			uiView(view);
+			break;
+		}
+	} else {
+		for (struct View *view = viewHead; view; view = view->next) {
+			if (num--) continue;
+			uiView(view);
+			break;
+		}
+	}
+}
+
+static const short IRC_COLORS[] = {
+	[IRC_WHITE]       = 8 + COLOR_WHITE,
+	[IRC_BLACK]       = 0 + COLOR_BLACK,
+	[IRC_BLUE]        = 0 + COLOR_BLUE,
+	[IRC_GREEN]       = 0 + COLOR_GREEN,
+	[IRC_RED]         = 8 + COLOR_RED,
+	[IRC_BROWN]       = 0 + COLOR_RED,
+	[IRC_MAGENTA]     = 0 + COLOR_MAGENTA,
+	[IRC_ORANGE]      = 0 + COLOR_YELLOW,
+	[IRC_YELLOW]      = 8 + COLOR_YELLOW,
+	[IRC_LIGHT_GREEN] = 8 + COLOR_GREEN,
+	[IRC_CYAN]        = 0 + COLOR_CYAN,
+	[IRC_LIGHT_CYAN]  = 8 + COLOR_CYAN,
+	[IRC_LIGHT_BLUE]  = 8 + COLOR_BLUE,
+	[IRC_PINK]        = 8 + COLOR_MAGENTA,
+	[IRC_GRAY]        = 8 + COLOR_BLACK,
+	[IRC_LIGHT_GRAY]  = 0 + COLOR_WHITE,
 };
 
 static const wchar_t *parseColor(short *pair, const wchar_t *str) {
@@ -310,9 +324,13 @@ static void addIRC(WINDOW *win, const wchar_t *str) {
 }
 
 void uiTopic(struct Tag tag, const char *topic) {
+	struct View *view = viewTag(tag);
+	if (!view->topic) {
+		view->topic = newpad(2, TOPIC_COLS);
+		mvwhline(view->topic, 1, 0, ACS_HLINE, TOPIC_COLS);
+	}
 	wchar_t *wcs = ambstowcs(topic);
 	if (!wcs) err(EX_DATAERR, "ambstowcs");
-	struct View *view = uiView(tag);
 	wmove(view->topic, 0, 0);
 	addIRC(view->topic, wcs);
 	wclrtoeol(view->topic);
@@ -320,7 +338,7 @@ void uiTopic(struct Tag tag, const char *topic) {
 }
 
 void uiLog(struct Tag tag, const wchar_t *line) {
-	struct View *view = uiView(tag);
+	struct View *view = viewTag(tag);
 	waddch(view->log, '\n');
 	if (view->mark) {
 		waddch(view->log, '\n');
@@ -330,93 +348,89 @@ void uiLog(struct Tag tag, const wchar_t *line) {
 }
 
 void uiFmt(struct Tag tag, const wchar_t *format, ...) {
-	wchar_t *buf;
+	wchar_t *wcs;
 	va_list ap;
 	va_start(ap, format);
-	vaswprintf(&buf, format, ap);
+	vaswprintf(&wcs, format, ap);
 	va_end(ap);
-	if (!buf) err(EX_OSERR, "vaswprintf");
-	uiLog(tag, buf);
-	free(buf);
+	if (!wcs) err(EX_OSERR, "vaswprintf");
+	uiLog(tag, wcs);
+	free(wcs);
 }
 
-static void logUp(void) {
-	struct View *view = uiView(ui.tag);
-	if (view->scroll == logHeight()) return;
-	if (view->scroll == LOG_LINES) view->mark = true;
-	view->scroll = MAX(view->scroll - logHeight() / 2, logHeight());
+static void logPageUp(void) {
+	int height = logHeight(ui.view);
+	if (ui.view->scroll == height) return;
+	if (ui.view->scroll == LOG_LINES) ui.view->mark = true;
+	ui.view->scroll = MAX(ui.view->scroll - height / 2, height);
 }
-static void logDown(void) {
-	struct View *view = uiView(ui.tag);
-	if (view->scroll == LOG_LINES) return;
-	view->scroll = MIN(view->scroll + logHeight() / 2, LOG_LINES);
-	if (view->scroll == LOG_LINES) view->mark = false;
+static void logPageDown(void) {
+	if (ui.view->scroll == LOG_LINES) return;
+	ui.view->scroll = MIN(ui.view->scroll + logHeight(ui.view) / 2, LOG_LINES);
+	if (ui.view->scroll == LOG_LINES) ui.view->mark = false;
 }
 
 static bool keyChar(wchar_t ch) {
-	static bool esc, csi;
-	if (ch == L'\33') {
-		esc = true;
-		return false;
-	}
-	if (esc && ch == L'[') {
-		esc = false;
-		csi = true;
-		return false;
+	if (iswascii(ch)) {
+		enum TermEvent event = termEvent((char)ch);
+		switch (event) {
+			break; case TERM_FOCUS_IN:  ui.view->mark = false;
+			break; case TERM_FOCUS_OUT: ui.view->mark = true;
+			break; default: {}
+		}
+		if (event) return false;
 	}
-	if (csi) {
-		if (ch == L'O') uiView(ui.tag)->mark = true;
-		if (ch == L'I') uiView(ui.tag)->mark = false;
-		csi = false;
+
+	static bool meta;
+	if (ch == L'\33') {
+		meta = true;
 		return false;
 	}
-	if (ch == L'\177') ch = L'\b';
 
-	bool update = true;
-	if (esc) {
+	if (meta) {
+		bool update = true;
 		switch (ch) {
-			break; case L'b':  edit(ui.tag, EDIT_BACK_WORD, 0);
-			break; case L'f':  edit(ui.tag, EDIT_FORE_WORD, 0);
-			break; case L'\b': edit(ui.tag, EDIT_KILL_BACK_WORD, 0);
-			break; case L'd':  edit(ui.tag, EDIT_KILL_FORE_WORD, 0);
+			break; case L'b':  edit(ui.view->tag, EDIT_BACK_WORD, 0);
+			break; case L'f':  edit(ui.view->tag, EDIT_FORE_WORD, 0);
+			break; case L'\b': edit(ui.view->tag, EDIT_KILL_BACK_WORD, 0);
+			break; case L'd':  edit(ui.view->tag, EDIT_KILL_FORE_WORD, 0);
 			break; default: {
 				update = false;
-				if (ch >= L'0' && ch <= L'9') {
-					struct Tag tag = tagNum(ch - L'0');
-					if (tag.name) uiFocus(tag);
-				}
+				if (ch < L'0' || ch > L'9') break;
+				uiViewNum(ch - L'0');
 			}
 		}
-		esc = false;
+		meta = false;
 		return update;
 	}
 
+	if (ch == L'\177') ch = L'\b';
 	switch (ch) {
 		break; case CTRL(L'L'): uiRedraw(); return false;
 
-		break; case CTRL(L'A'): edit(ui.tag, EDIT_HOME, 0);
-		break; case CTRL(L'B'): edit(ui.tag, EDIT_LEFT, 0);
-		break; case CTRL(L'D'): edit(ui.tag, EDIT_DELETE, 0);
-		break; case CTRL(L'E'): edit(ui.tag, EDIT_END, 0);
-		break; case CTRL(L'F'): edit(ui.tag, EDIT_RIGHT, 0);
-		break; case CTRL(L'K'): edit(ui.tag, EDIT_KILL_LINE, 0);
-		break; case CTRL(L'W'): edit(ui.tag, EDIT_KILL_BACK_WORD, 0);
-
-		break; case CTRL(L'C'): edit(ui.tag, EDIT_INSERT, IRC_COLOR);
-		break; case CTRL(L'N'): edit(ui.tag, EDIT_INSERT, IRC_RESET);
-		break; case CTRL(L'O'): edit(ui.tag, EDIT_INSERT, IRC_BOLD);
-		break; case CTRL(L'R'): edit(ui.tag, EDIT_INSERT, IRC_COLOR);
-		break; case CTRL(L'T'): edit(ui.tag, EDIT_INSERT, IRC_ITALIC);
-		break; case CTRL(L'U'): edit(ui.tag, EDIT_INSERT, IRC_UNDERLINE);
-		break; case CTRL(L'V'): edit(ui.tag, EDIT_INSERT, IRC_REVERSE);
-
-		break; case L'\b': edit(ui.tag, EDIT_BACKSPACE, 0);
-		break; case L'\t': edit(ui.tag, EDIT_COMPLETE, 0);
-		break; case L'\n': edit(ui.tag, EDIT_ENTER, 0);
+		break; case CTRL(L'A'): edit(ui.view->tag, EDIT_HOME, 0);
+		break; case CTRL(L'B'): edit(ui.view->tag, EDIT_LEFT, 0);
+		break; case CTRL(L'D'): edit(ui.view->tag, EDIT_DELETE, 0);
+		break; case CTRL(L'E'): edit(ui.view->tag, EDIT_END, 0);
+		break; case CTRL(L'F'): edit(ui.view->tag, EDIT_RIGHT, 0);
+		break; case CTRL(L'K'): edit(ui.view->tag, EDIT_KILL_LINE, 0);
+		break; case CTRL(L'W'): edit(ui.view->tag, EDIT_KILL_BACK_WORD, 0);
+
+		break; case CTRL(L'C'): edit(ui.view->tag, EDIT_INSERT, IRC_COLOR);
+		break; case CTRL(L'N'): edit(ui.view->tag, EDIT_INSERT, IRC_RESET);
+		break; case CTRL(L'O'): edit(ui.view->tag, EDIT_INSERT, IRC_BOLD);
+		break; case CTRL(L'R'): edit(ui.view->tag, EDIT_INSERT, IRC_COLOR);
+		break; case CTRL(L'T'): edit(ui.view->tag, EDIT_INSERT, IRC_ITALIC);
+		break; case CTRL(L'U'): edit(ui.view->tag, EDIT_INSERT, IRC_UNDERLINE);
+		break; case CTRL(L'V'): edit(ui.view->tag, EDIT_INSERT, IRC_REVERSE);
+
+		break; case L'\b': edit(ui.view->tag, EDIT_BACKSPACE, 0);
+		break; case L'\t': edit(ui.view->tag, EDIT_COMPLETE, 0);
+		break; case L'\n': edit(ui.view->tag, EDIT_ENTER, 0);
 
 		break; default: {
 			if (!iswprint(ch)) return false;
-			edit(ui.tag, EDIT_INSERT, ch);
+			edit(ui.view->tag, EDIT_INSERT, ch);
 		}
 	}
 	return true;
@@ -425,15 +439,15 @@ static bool keyChar(wchar_t ch) {
 static bool keyCode(wchar_t ch) {
 	switch (ch) {
 		break; case KEY_RESIZE:    uiResize(); return false;
-		break; case KEY_PPAGE:     logUp(); return false;
-		break; case KEY_NPAGE:     logDown(); return false;
-		break; case KEY_LEFT:      edit(ui.tag, EDIT_LEFT, ch);
-		break; case KEY_RIGHT:     edit(ui.tag, EDIT_RIGHT, ch);
-		break; case KEY_HOME:      edit(ui.tag, EDIT_HOME, ch);
-		break; case KEY_END:       edit(ui.tag, EDIT_END, ch);
-		break; case KEY_DC:        edit(ui.tag, EDIT_DELETE, ch);
-		break; case KEY_BACKSPACE: edit(ui.tag, EDIT_BACKSPACE, ch);
-		break; case KEY_ENTER:     edit(ui.tag, EDIT_ENTER, ch);
+		break; case KEY_PPAGE:     logPageUp(); return false;
+		break; case KEY_NPAGE:     logPageDown(); return false;
+		break; case KEY_LEFT:      edit(ui.view->tag, EDIT_LEFT, 0);
+		break; case KEY_RIGHT:     edit(ui.view->tag, EDIT_RIGHT, 0);
+		break; case KEY_HOME:      edit(ui.view->tag, EDIT_HOME, 0);
+		break; case KEY_END:       edit(ui.view->tag, EDIT_END, 0);
+		break; case KEY_DC:        edit(ui.view->tag, EDIT_DELETE, 0);
+		break; case KEY_BACKSPACE: edit(ui.view->tag, EDIT_BACKSPACE, 0);
+		break; case KEY_ENTER:     edit(ui.view->tag, EDIT_ENTER, 0);
 	}
 	return true;
 }
@@ -453,14 +467,11 @@ void uiRead(void) {
 	}
 	if (!update) return;
 
+	int y, x;
 	wmove(ui.input, 1, 0);
 	addIRC(ui.input, editHead());
-
-	int y, x;
 	getyx(ui.input, y, x);
-
 	addIRC(ui.input, editTail());
-
 	wclrtoeol(ui.input);
 	wmove(ui.input, y, x);
 }