bindings: add support for action "require_screen"

doc/bindings

@@ -88,6 +88,13 @@
 ##      before we stuff characters into input queue, so if condition
 ##      is not met, whole chain is aborted and we're fine.
 ##
+##    - require_screen "screen" - checks whether given screen is
+##      currently active. accepted values: browser, clock, help,
+##      media_library, outputs, playlist, playlist_editor,
+##      search_engine, tag_editor, visualizer, last_fm, lyrics,
+##      selected_items_adder, server_info, song_info,
+##      sort_playlist_dialog, tiny_tag_editor.
+##
 ## Note: Both 'backspace' and 'backspace_2' are used because some
 ##       terminals interpret backspace using keycode of 'backspace'
 ##       and some the one of 'backspace_2'. You can get away with

src/Makefile.am

@@ -21,6 +21,7 @@ ncmpcpp_SOURCES = \
 	lastfm_service.cpp \
 	lyrics.cpp \
 	lyrics_fetcher.cpp \
+	macro_utilities.cpp \
 	media_library.cpp \
 	mpdpp.cpp \
 	mutable_song.cpp \

src/bindings.cpp

@@ -127,6 +127,16 @@ Action *parseActionLine(const std::string &line, F error)
 			else
 				error() << "empty argument passed to push_characters\n";
 		}
+		else if (action_name == "require_screen")
+		{
+			// require screen of given type
+			std::string arg = getEnclosedString(line, '"', '"', 0);
+			ScreenType screen_type = stringToScreenType(arg);
+			if (screen_type != ScreenType::Unknown)
+				result = new RequireScreen(screen_type);
+			else
+				error() << "unknown screen passed to require_screen: '" << arg << "'\n";
+		}
 		else if (action_name == "require_runnable")
 		{
 			// require that given action is runnable

src/macro_utilities.cpp

@@ -0,0 +1,38 @@
+/***************************************************************************
+ *   Copyright (C) 2008-2012 by Andrzej Rybczak                            *
+ *   electricityispower@gmail.com                                          *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.              *
+ ***************************************************************************/
+
+#include "global.h"
+#include "macro_utilities.h"
+
+void PushCharacters::Run()
+{
+	for (auto it = m_queue.begin(); it != m_queue.end(); ++it)
+		(*m_window)->pushChar(*it);
+}
+
+bool RequireRunnable::canBeRun() const
+{
+	return m_action->canBeRun();
+}
+
+bool RequireScreen::canBeRun() const
+{
+	return Global::myScreen->type() == m_screen_type;
+}

src/macro_utilities.h

@@ -23,6 +23,7 @@
 
 #include <cassert>
 #include "actions.h"
+#include "screen_type.h"
 
 struct PushCharacters : public Action
 {
@@ -30,10 +31,7 @@ struct PushCharacters : public Action
 	: Action(aMacroUtility, ""), m_window(w), m_queue(queue) { }
 	
 protected:
-	virtual void Run() {
-		for (auto it = m_queue.begin(); it != m_queue.end(); ++it)
-			(*m_window)->pushChar(*it);
-	}
+	virtual void Run();
 	
 private:
 	NC::Window **m_window;
@@ -46,11 +44,24 @@ struct RequireRunnable : public Action
 	: Action(aMacroUtility, ""), m_action(action) { assert(action); }
 	
 protected:
-	virtual bool canBeRun() const { return m_action->canBeRun(); }
+	virtual bool canBeRun() const;
 	virtual void Run() { }
 	
 private:
 	Action *m_action;
 };
 
+struct RequireScreen : public Action
+{
+	RequireScreen(ScreenType screen_type)
+	: Action(aMacroUtility, ""), m_screen_type(screen_type) { }
+	
+protected:
+	virtual bool canBeRun() const;
+	virtual void Run() { }
+	
+private:
+	ScreenType m_screen_type;
+};
+
 #endif // _MACRO_UTILITIES