From c06a45746117786f687ded1c62047e9194107e96 Mon Sep 17 00:00:00 2001
From: Curtis McEnroe <june@causal.agency>
Date: Sat, 23 Feb 2019 12:24:39 -0500
Subject: [PATCH] Add C-n and C-p key bindings to switch windows

---
 catgirl.1 |  6 +++++-
 chat.h    |  2 +-
 input.c   |  3 ++-
 ui.c      | 20 ++++++++++----------
 4 files changed, 18 insertions(+), 13 deletions(-)

diff --git a/catgirl.1 b/catgirl.1
index 8927480..2f2bcbb 100644
--- a/catgirl.1
+++ b/catgirl.1
@@ -1,4 +1,4 @@
-.Dd February 22, 2019
+.Dd February 23, 2019
 .Dt CATGIRL 1
 .Os
 .
@@ -292,6 +292,10 @@ The color numbers are as follows:
 .Bl -tag -width "PageDown" -compact
 .It Ic C-l
 Redraw the UI.
+.It Ic C-n
+Switch to the next window.
+.It Ic C-p
+Swittch to the previous window.
 .It Ic M-m
 Insert a blank line in the window.
 .It Ic M- Ns Ar n
diff --git a/chat.h b/chat.h
index afb32ef..452470d 100644
--- a/chat.h
+++ b/chat.h
@@ -122,7 +122,7 @@ void uiExit(int status);
 
 void uiPrompt(bool nickChanged);
 void uiShowTag(struct Tag tag);
-void uiShowNum(int num);
+void uiShowNum(int num, bool relative);
 void uiCloseTag(struct Tag tag);
 
 enum UIHeat {
diff --git a/input.c b/input.c
index 7c2ffef..dee50f2 100644
--- a/input.c
+++ b/input.c
@@ -146,9 +146,10 @@ static void inputWindow(struct Tag tag, char *params) {
 		uiLog(tag, UIHot, L"/window requires a name or number");
 		return;
 	}
+	bool relative = (params[0] == '+' || params[0] == '-');
 	int num = strtol(params, &params, 0);
 	if (!params[0]) {
-		uiShowNum(num);
+		uiShowNum(num, relative);
 	} else {
 		struct Tag name = tagFind(params);
 		if (name.id != TagNone.id) {
diff --git a/ui.c b/ui.c
index 26598cb..2f58fd4 100644
--- a/ui.c
+++ b/ui.c
@@ -354,18 +354,15 @@ void uiShowTag(struct Tag tag) {
 	uiPrompt(false);
 }
 
-void uiShowNum(int num) {
-	struct Window *win = NULL;
+void uiShowNum(int num, bool relative) {
+	struct Window *win = (relative ? windows.active : windows.head);
 	if (num < 0) {
-		for (win = windows.tail; win; win = win->prev) {
-			if (!++num) break;
-		}
+		for (; win; win = win->prev) if (!num++) break;
 	} else {
-		for (win = windows.head; win; win = win->next) {
-			if (!num--) break;
-		}
+		for (; win; win = win->next) if (!num--) break;
 	}
-	if (win) windowShow(win);
+	if (!win) return;
+	windowShow(win);
 	uiStatus();
 	uiPrompt(false);
 }
@@ -470,7 +467,7 @@ static void keyChar(wchar_t ch) {
 	}
 	if (meta) {
 		meta = false;
-		if (ch >= L'0' && ch <= L'9') uiShowNum(ch - L'0');
+		if (ch >= L'0' && ch <= L'9') uiShowNum(ch - L'0', false);
 		if (!win) return;
 		switch (ch) {
 			break; case L'b':  edit(win->tag, EditBackWord, 0);
@@ -485,6 +482,9 @@ static void keyChar(wchar_t ch) {
 	if (ch == CTRL(L'L')) clearok(curscr, true);
 	if (!win) return;
 	switch (ch) {
+		break; case CTRL(L'N'): uiShowNum(+1, true);
+		break; case CTRL(L'P'): uiShowNum(-1, true);
+
 		break; case CTRL(L'A'): edit(win->tag, EditHome, 0);
 		break; case CTRL(L'B'): edit(win->tag, EditLeft, 0);
 		break; case CTRL(L'D'): edit(win->tag, EditDelete, 0);