From 152e021619f3791d3c87a03a76625f3563413529 Mon Sep 17 00:00:00 2001
From: Jeffrey Middleton <jefromi@gmail.com>
Date: Tue, 3 Mar 2009 23:14:38 +0100
Subject: [PATCH] list_window: added top, middle, and bottom commands

Commands to move cursor to top, middle, and bottom of screen, mapped
by default to H, M, and L like in Vim.
---
 src/command.c     |  6 ++++++
 src/command.h     |  3 +++
 src/list_window.c | 33 +++++++++++++++++++++++++++++++++
 src/screen_help.c |  3 +++
 4 files changed, 45 insertions(+)

diff --git a/src/command.c b/src/command.c
index ad8b8d4..3a16e80 100644
--- a/src/command.c
+++ b/src/command.c
@@ -76,6 +76,12 @@ static command_definition_t cmds[] = {
 	  N_("Move cursor up") },
 	{ { DWN, 'j', 0 }, 0, CMD_LIST_NEXT, "down",
 	  N_("Move cursor down") },
+	{ { 'H', 0, 0 }, 0, CMD_LIST_TOP, "top",
+	  N_("Move cursor to top of screen") },
+	{ { 'M', 0, 0 }, 0, CMD_LIST_MIDDLE, "middle",
+	  N_("Move cursor to middle of screen") },
+	{ { 'L', 0, 0 }, 0, CMD_LIST_BOTTOM, "bottom",
+	  N_("Move cursor to bottom of screen") },
 	{ { HOME, 0x01, 0 }, 0, CMD_LIST_FIRST, "home",
 	  N_("Home") },
 	{ { END, 0x05, 0 }, 0, CMD_LIST_LAST, "end",
diff --git a/src/command.h b/src/command.h
index 7111a2b..c7514c4 100644
--- a/src/command.h
+++ b/src/command.h
@@ -59,6 +59,9 @@ typedef enum {
 	CMD_SEARCH_MODE,
 	CMD_LIST_PREVIOUS,
 	CMD_LIST_NEXT,
+	CMD_LIST_TOP,
+	CMD_LIST_MIDDLE,
+	CMD_LIST_BOTTOM,
 	CMD_LIST_FIRST,
 	CMD_LIST_LAST,
 	CMD_LIST_NEXT_PAGE,
diff --git a/src/list_window.c b/src/list_window.c
index 17107d6..bf0f45a 100644
--- a/src/list_window.c
+++ b/src/list_window.c
@@ -152,6 +152,30 @@ list_window_previous(struct list_window *lw, unsigned length)
 		list_window_set_selected(lw, length-1);
 }
 
+static void
+list_window_top(struct list_window *lw)
+{
+	list_window_set_selected(lw, lw->start);
+}
+
+static void
+list_window_middle(struct list_window *lw, unsigned length)
+{
+	if (length >= lw->rows)
+		list_window_set_selected(lw, lw->start + lw->rows / 2);
+	else
+		list_window_set_selected(lw, length / 2);
+}
+
+static void
+list_window_bottom(struct list_window *lw, unsigned length)
+{
+	if (length >= lw->rows)
+		list_window_set_selected(lw, lw->start + lw->rows - 1);
+	else
+		list_window_set_selected(lw, length - 1);
+}
+
 static void
 list_window_first(struct list_window *lw)
 {
@@ -369,6 +393,15 @@ list_window_cmd(struct list_window *lw, unsigned rows, command_t cmd)
 	case CMD_LIST_NEXT:
 		list_window_next(lw, rows);
 		break;
+	case CMD_LIST_TOP:
+		list_window_top(lw);
+		break;
+	case CMD_LIST_MIDDLE:
+		list_window_middle(lw,rows);
+		break;
+	case CMD_LIST_BOTTOM:
+		list_window_bottom(lw,rows);
+		break;
 	case CMD_LIST_FIRST:
 		list_window_first(lw);
 		break;
diff --git a/src/screen_help.c b/src/screen_help.c
index f8438dc..5a0654f 100644
--- a/src/screen_help.c
+++ b/src/screen_help.c
@@ -39,6 +39,9 @@ static help_text_row_t help_text[] = {
 	{ 2, CMD_NONE, NULL },
 	{ 0, CMD_LIST_PREVIOUS, NULL },
 	{ 0, CMD_LIST_NEXT, NULL },
+	{ 0, CMD_LIST_TOP, NULL },
+	{ 0, CMD_LIST_MIDDLE, NULL },
+	{ 0, CMD_LIST_BOTTOM, NULL },
 	{ 0, CMD_LIST_PREVIOUS_PAGE, NULL },
 	{ 0, CMD_LIST_NEXT_PAGE, NULL },
 	{ 0, CMD_LIST_FIRST, NULL },
-- 
2.30.2