use CListHelpers to remove duplicated code

CListHelpers::UpDownKey() allows to remove duplicated
code from channellist, bouquetlist and bouqueteditor.


Origin commit data
------------------
Branch: ni/coolstream
Commit: c9e72e654f
Author: Stefan Seyfried <seife@tuxbox-git.slipkontur.de>
Date: 2016-01-16 (Sat, 16 Jan 2016)



------------------
This commit was generated by Migit

src/gui/bedit/bouqueteditor_bouquets.cpp

@@ -2,15 +2,7 @@
 	Neutrino-GUI  -   DBoxII-Project
 
 	Copyright (C) 2001 Steffen Hehn 'McClean'
-	Homepage: http://dbox.cyberphoria.org/
+	Copyright (C) 2009,2011,2013,2016 Stefan Seyfried
-
-	Kommentar:
-
-	Diese GUI wurde von Grund auf neu programmiert und sollte nun vom
-	Aufbau und auch den Ausbaumoeglichkeiten gut aussehen. Neutrino basiert
-	auf der Client-Server Idee, diese GUI ist also von der direkten DBox-
-	Steuerung getrennt. Diese wird dann von Daemons uebernommen.
-
 
 	License: GPL
 
@@ -166,7 +158,7 @@ void CBEBouquetWidget::hide()
 
 void CBEBouquetWidget::updateSelection(unsigned int newpos)
 {
-	if(newpos == selected)
+	if (newpos == selected || newpos == (unsigned int)-1)
 		return;
 
 	unsigned int prev_selected = selected;
@@ -272,35 +264,12 @@ int CBEBouquetWidget::exec(CMenuTarget* parent, const std::string & /*actionKey*
 				cancelMoveBouquet();
 			}
 		}
-		else if (msg==CRCInput::RC_up || msg==(neutrino_msg_t)g_settings.key_pageup)
+		else if (msg == CRCInput::RC_up || msg == (neutrino_msg_t)g_settings.key_pageup ||
+			 msg == CRCInput::RC_down || msg == (neutrino_msg_t)g_settings.key_pagedown)
 		{
-			if (!(Bouquets->empty())) {
+			int new_selected = UpDownKey(*Bouquets, msg, listmaxshow, selected);
-				int step = (msg == (neutrino_msg_t)g_settings.key_pageup) ? listmaxshow : 1;  // browse or step 1
-				int new_selected = selected - step;
-
-				if (new_selected < 0) {
-					if (selected != 0 && step != 1)
-						new_selected = 0;
-					else
-						new_selected = Bouquets->size() - 1;
-				}
 			updateSelection(new_selected);
 		}
-		}
-		else if (msg==CRCInput::RC_down || msg==(neutrino_msg_t)g_settings.key_pagedown)
-		{
-			if (!(Bouquets->empty())) {
-				int step =  ((int) msg == g_settings.key_pagedown) ? listmaxshow : 1;  // browse or step 1
-				int new_selected = selected + step;
-				if (new_selected > (int) Bouquets->size() - 1) {
-					if ((selected != Bouquets->size() - 1))
-						new_selected = Bouquets->size() - 1;
-					else
-						new_selected = 0;
-				}
-				updateSelection(new_selected);
-			}
-		}
 		else if (msg == (neutrino_msg_t) g_settings.key_list_start || msg == (neutrino_msg_t) g_settings.key_list_end) {
 			if (!(Bouquets->empty())) {
 				int new_selected = msg == (neutrino_msg_t) g_settings.key_list_start ? 0 : Bouquets->size() - 1;

src/gui/bedit/bouqueteditor_bouquets.h

@@ -39,6 +39,7 @@
 #include <zapit/channel.h>
 #include <zapit/bouquets.h>
 #include <gui/components/cc.h>
+#include <gui/widget/listhelpers.h>
 #include <string>
 
 /* class for handling when bouquets changed.                  */
@@ -51,7 +52,7 @@ public:
 	virtual void onBouquetsChanged() {};
 };
 
-class CBEBouquetWidget : public CMenuTarget
+class CBEBouquetWidget : public CMenuTarget, public CListHelpers
 {
 
 	private:

src/gui/bedit/bouqueteditor_channels.cpp

@@ -5,14 +5,7 @@
 	Homepage: http://dbox.cyberphoria.org/
 
 	Copyright (C) 2011 CoolStream International Ltd
-
+	Copyright (C) 2009,2011,2013,2016 Stefan Seyfried
-	Kommentar:
-
-	Diese GUI wurde von Grund auf neu programmiert und sollte nun vom
-	Aufbau und auch den Ausbaumoeglichkeiten gut aussehen. Neutrino basiert
-	auf der Client-Server Idee, diese GUI ist also von der direkten DBox-
-	Steuerung getrennt. Diese wird dann von Daemons uebernommen.
-
 
 	License: GPL
 
@@ -283,7 +276,7 @@ void CBEChannelWidget::hide()
 
 void CBEChannelWidget::updateSelection(unsigned int newpos)
 {
-        if(newpos == selected)
+        if (newpos == selected || newpos == (unsigned int)-1)
                 return;
 
         unsigned int prev_selected = selected;
@@ -360,35 +353,12 @@ int CBEChannelWidget::exec(CMenuTarget* parent, const std::string & /*actionKey*
 				cancelMoveChannel();
 			}
 		}
-		else if (msg==CRCInput::RC_up || msg==(neutrino_msg_t)g_settings.key_pageup)
+		else if (msg == CRCInput::RC_up || msg == (neutrino_msg_t)g_settings.key_pageup ||
+			 msg == CRCInput::RC_down || msg == (neutrino_msg_t)g_settings.key_pagedown)
 		{
-			if (!(Channels->empty())) {
+			int new_selected = UpDownKey(*Channels, msg, listmaxshow, selected);
-                                int step = (msg == (neutrino_msg_t)g_settings.key_pageup) ? listmaxshow : 1;  // browse or step 1
-                                int new_selected = selected - step;
-
-                                if (new_selected < 0) {
-                                        if (selected != 0 && step != 1)
-                                                new_selected = 0;
-                                        else
-                                                new_selected = Channels->size() - 1;
-                                }
 			updateSelection(new_selected);
 		}
-		}
-		else if (msg==CRCInput::RC_down || msg==(neutrino_msg_t)g_settings.key_pagedown)
-		{
-                        if (!(Channels->empty())) {
-                                int step =  ((int) msg == g_settings.key_pagedown) ? listmaxshow : 1;  // browse or step 1
-                                int new_selected = selected + step;
-				if (new_selected > (int) Channels->size() - 1) {
-					if ((selected != Channels->size() - 1))
-						new_selected = Channels->size() - 1;
-					else
-						new_selected = 0;
-				}
-                                updateSelection(new_selected);
-                        }
-		}
                 else if (msg == (neutrino_msg_t) g_settings.key_list_start || msg == (neutrino_msg_t) g_settings.key_list_end) {
                         if (!(Channels->empty())) {
                                 int new_selected = msg == (neutrino_msg_t) g_settings.key_list_start ? 0 : Channels->size() - 1;

src/gui/bedit/bouqueteditor_channels.h

@@ -35,6 +35,7 @@
 
 #include <driver/framebuffer.h>
 #include <gui/widget/menue.h>
+#include <gui/widget/listhelpers.h>
 #include <gui/components/cc.h>
 #include <zapit/client/zapitclient.h>
 
@@ -42,7 +43,7 @@
 #include <zapit/channel.h>
 #include <zapit/bouquets.h>
 
-class CBEChannelWidget : public CMenuTarget
+class CBEChannelWidget : public CMenuTarget, public CListHelpers
 {
 
 	private:

src/gui/bouquetlist.cpp

@@ -2,15 +2,7 @@
 	Neutrino-GUI  -   DBoxII-Project
 
 	Copyright (C) 2001 Steffen Hehn 'McClean'
-	Homepage: http://dbox.cyberphoria.org/
+	Copyright (C) 2009,2011,2013,2015-2016 Stefan Seyfried
-
-	Kommentar:
-
-	Diese GUI wurde von Grund auf neu programmiert und sollte nun vom
-	Aufbau und auch den Ausbaumoeglichkeiten gut aussehen. Neutrino basiert
-	auf der Client-Server Idee, diese GUI ist also von der direkten DBox-
-	Steuerung getrennt. Diese wird dann von Daemons uebernommen.
-
 
 	License: GPL
 
@@ -391,6 +383,8 @@ const struct button_label CBouquetListButtons[4] =
 
 void CBouquetList::updateSelection(int newpos)
 {
+	if (newpos < 0) /* to avoid all callers having to check */
+		return;
 	if((int) selected != newpos) {
 		int prev_selected = selected;
 		unsigned int oldliststart = liststart;
@@ -528,34 +522,12 @@ int CBouquetList::show(bool bShowChannelList)
 			if (!Bouquets.empty())
 				updateSelection(Bouquets.size()-1);
 		}
-		else if (msg == CRCInput::RC_up || (int) msg == g_settings.key_pageup)
+		else if (msg == CRCInput::RC_up || (int) msg == g_settings.key_pageup ||
+			 msg == CRCInput::RC_down || (int) msg == g_settings.key_pagedown)
 		{
-			if (!Bouquets.empty()) {
+			int new_selected = UpDownKey(Bouquets, msg, listmaxshow, selected);
-				int step = ((int) msg == g_settings.key_pageup) ? listmaxshow : 1;  // browse or step 1
-				int new_selected = selected - step;
-				if (new_selected < 0) {
-					if (selected != 0 && step != 1)
-						new_selected = 0;
-					else
-						new_selected = Bouquets.size() - 1;
-				}
 			updateSelection(new_selected);
 		}
-		}
-		else if (msg == CRCInput::RC_down || (int) msg == g_settings.key_pagedown)
-		{
-			if (!Bouquets.empty()) {
-				int step =  ((int) msg == g_settings.key_pagedown) ? listmaxshow : 1;  // browse or step 1
-				int new_selected = selected + step;
-				if (new_selected > (int) Bouquets.size() - 1) {
-					if ((selected != Bouquets.size() - 1))
-						new_selected = Bouquets.size() - 1;
-					else
-						new_selected = 0;
-				}
-				updateSelection(new_selected);
-			}
-		}
 		else if(msg == (neutrino_msg_t)g_settings.key_bouquet_up || msg == (neutrino_msg_t)g_settings.key_bouquet_down) {
 			if(bShowChannelList) {
 				int mode = CNeutrinoApp::getInstance()->GetChannelMode();

src/gui/bouquetlist.h

@@ -34,6 +34,7 @@
 #define __bouquetlist__
 
 #include <gui/channellist.h>
+#include <gui/widget/listhelpers.h>
 
 #include <driver/framebuffer.h>
 #include <system/lastchannel.h>
@@ -77,7 +78,7 @@ class CBouquet
 };
 
 
-class CBouquetList
+class CBouquetList : public CListHelpers
 {
 	private:
 		CFrameBuffer		*frameBuffer;

src/gui/channellist.cpp

@@ -2,7 +2,7 @@
 	Neutrino-GUI  -   DBoxII-Project
 
 	Copyright (C) 2001 Steffen Hehn 'McClean'
-	Copyright (C) 2007-2015 Stefan Seyfried
+	Copyright (C) 2007-2016 Stefan Seyfried
 
 	Kommentar:
 
@@ -728,30 +728,12 @@ int CChannelList::show()
 		else if (!empty && msg == (neutrino_msg_t) g_settings.key_list_end) {
 			actzap = updateSelection((*chanlist).size()-1);
 		}
-		else if (!empty && (msg == CRCInput::RC_up || (int) msg == g_settings.key_pageup))
+		else if (!empty && (msg == CRCInput::RC_up || (int)msg == g_settings.key_pageup ||
+				    msg == CRCInput::RC_down || (int)msg == g_settings.key_pagedown))
 		{
 			displayList = 1;
-			int step = ((int) msg == g_settings.key_pageup) ? listmaxshow : 1;  // browse or step 1
+			int new_selected = UpDownKey((*chanlist), msg, listmaxshow, selected);
-			int new_selected = selected - step;
+			if (new_selected >= 0)
-			if (new_selected < 0) {
-				if (selected != 0 && step != 1)
-					new_selected = 0;
-				else
-					new_selected = (*chanlist).size() - 1;
-			}
-			actzap = updateSelection(new_selected);
-		}
-		else if (!empty && (msg == CRCInput::RC_down || (int) msg == g_settings.key_pagedown))
-		{
-			displayList = 1;
-			int step =  ((int) msg == g_settings.key_pagedown) ? listmaxshow : 1;  // browse or step 1
-			int new_selected = selected + step;
-			if (new_selected > (int) (*chanlist).size() - 1) {
-				if ((selected != (*chanlist).size() - 1))
-					new_selected = (*chanlist).size() - 1;
-				else
-					new_selected = 0;
-			}
 				actzap = updateSelection(new_selected);
 		}
 		else if (!edit_state && (msg == (neutrino_msg_t)g_settings.key_bouquet_up ||

src/gui/channellist.h

@@ -35,6 +35,7 @@
 
 #include <driver/framebuffer.h>
 #include <gui/widget/menue.h>
+#include <gui/widget/listhelpers.h>
 #include <gui/components/cc.h>
 #include <system/lastchannel.h>
 
@@ -63,7 +64,7 @@ enum {
 
 class CBouquet;
 
-class CChannelList
+class CChannelList : public CListHelpers
 {
 private:
 	enum state_