From 7a02354513acad9e315b4f4f736b77a08de363a6 Mon Sep 17 00:00:00 2001
From: Lars-Dominik Braun <lars@6xq.net>
Date: Sat, 17 Mar 2012 19:27:27 +0100
Subject: Auto-select last remaining item of filtered list

See #231.
---
 src/ui.c | 41 ++++++++++++++++++++++++++---------------
 1 file changed, 26 insertions(+), 15 deletions(-)

(limited to 'src/ui.c')

diff --git a/src/ui.c b/src/ui.c
index acba151..104ee04 100644
--- a/src/ui.c
+++ b/src/ui.c
@@ -330,14 +330,17 @@ static PianoStation_t **BarSortedStations (PianoStation_t *unsortedStations,
 
 /*	let user pick one station
  *	@param app handle
+ *	@param stations that should be listed
  *	@param prompt string
  *	@param called if input was not a number
+ *	@param auto-select if only one station remains after filtering
  *	@return pointer to selected station or NULL
  */
 PianoStation_t *BarUiSelectStation (BarApp_t *app, PianoStation_t *stations,
-		const char *prompt, BarUiSelectStationCallback_t callback) {
+		const char *prompt, BarUiSelectStationCallback_t callback,
+		bool autoselect) {
 	PianoStation_t **sortedStations = NULL, *retStation = NULL;
-	size_t stationCount, i;
+	size_t stationCount, i, lastDisplayed, displayCount;
 	char buf[100];
 
 	if (stations == NULL) {
@@ -352,6 +355,7 @@ PianoStation_t *BarUiSelectStation (BarApp_t *app, PianoStation_t *stations,
 			app->settings.sortOrder);
 
 	do {
+		displayCount = 0;
 		for (i = 0; i < stationCount; i++) {
 			const PianoStation_t *currStation = sortedStations[i];
 			/* filter stations */
@@ -361,26 +365,33 @@ PianoStation_t *BarUiSelectStation (BarApp_t *app, PianoStation_t *stations,
 						currStation->isQuickMix ? 'Q' : ' ',
 						!currStation->isCreator ? 'S' : ' ',
 						currStation->name);
+				++displayCount;
+				lastDisplayed = i;
 			}
 		}
 
 		BarUiMsg (&app->settings, MSG_QUESTION, prompt);
-		if (BarReadlineStr (buf, sizeof (buf), &app->input,
-				BAR_RL_DEFAULT) == 0) {
-			free (sortedStations);
-			return NULL;
-		}
+		if (autoselect && displayCount == 1 && stationCount != 1) {
+			/* auto-select last remaining station */
+			BarUiMsg (&app->settings, MSG_NONE, "%i\n", lastDisplayed);
+			retStation = sortedStations[lastDisplayed];
+		} else {
+			if (BarReadlineStr (buf, sizeof (buf), &app->input,
+					BAR_RL_DEFAULT) == 0) {
+				break;
+			}
 
-		if (isnumeric (buf)) {
-			unsigned long selected = strtoul (buf, NULL, 0);
-			if (selected < stationCount) {
-				retStation = sortedStations[selected];
+			if (isnumeric (buf)) {
+				unsigned long selected = strtoul (buf, NULL, 0);
+				if (selected < stationCount) {
+					retStation = sortedStations[selected];
+				}
 			}
-		}
 
-		/* hand over buffer to external function if it was not a station number */
-		if (retStation == NULL && callback != NULL) {
-			callback (app, buf);
+			/* hand over buffer to external function if it was not a station number */
+			if (retStation == NULL && callback != NULL) {
+				callback (app, buf);
+			}
 		}
 	} while (retStation == NULL);
 
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