Editor zoom: add zoom_to_extents()

gtk2_ardour/ardour.menus.in

@@ -449,6 +449,7 @@
         <menuitem action='temporal-zoom-in'/>
         <menuitem action='temporal-zoom-out'/>
         <menuitem action='zoom-to-session'/>
+        <menuitem action='zoom-to-extents'/>
         <menuitem action='zoom-to-selection'/>
         <menuitem action='zoom-to-selection-horiz'/>
         <menuitem action='fit-selection'/>

gtk2_ardour/editor.cc

@@ -3782,6 +3782,7 @@ Editor::build_track_count_menu ()
 		zoom_preset_selector.AddMenuElem (MenuElem (_("Zoom to 8 hours"), sigc::bind (sigc::mem_fun(*this, &Editor::set_zoom_preset), 8 * 60 * 60 * 1000)));
 		zoom_preset_selector.AddMenuElem (MenuElem (_("Zoom to 24 hours"), sigc::bind (sigc::mem_fun(*this, &Editor::set_zoom_preset), 24 * 60 * 60 * 1000)));
 		zoom_preset_selector.AddMenuElem (MenuElem (_("Zoom to Session"), sigc::mem_fun(*this, &Editor::temporal_zoom_session)));
+		zoom_preset_selector.AddMenuElem (MenuElem (_("Zoom to Extents"), sigc::mem_fun(*this, &Editor::temporal_zoom_extents)));
 		zoom_preset_selector.AddMenuElem (MenuElem (_("Zoom to Range/Region Selection"), sigc::bind (sigc::mem_fun(*this, &Editor::temporal_zoom_selection), Horizontal)));
 	}
 }

gtk2_ardour/editor.h

@@ -365,7 +365,7 @@ public:
 	void toggle_measure_visibility ();
 
 	/* returns the left-most and right-most time that the gui should allow the user to scroll to */
-	std::pair <framepos_t,framepos_t> session_gui_extents() const; 
+	std::pair <framepos_t,framepos_t> session_gui_extents( bool use_extra = true ) const; 
 
 	/* fades */
 
@@ -1342,6 +1342,7 @@ private:
 	void calc_extra_zoom_edges(framepos_t &start, framepos_t &end);
 	void temporal_zoom_selection (Editing::ZoomAxis);
 	void temporal_zoom_session ();
+	void temporal_zoom_extents ();
 	void temporal_zoom (framecnt_t samples_per_pixel);
 	void temporal_zoom_by_frame (framepos_t start, framepos_t end);
 	void temporal_zoom_to_frame (bool coarser, framepos_t frame);

gtk2_ardour/editor_actions.cc

@@ -276,6 +276,7 @@ Editor::register_actions ()
 	reg_sens (editor_actions, "temporal-zoom-out", _("Zoom Out"), sigc::bind (sigc::mem_fun(*this, &Editor::temporal_zoom_step), true));
 	reg_sens (editor_actions, "temporal-zoom-in", _("Zoom In"), sigc::bind (sigc::mem_fun(*this, &Editor::temporal_zoom_step), false));
 	reg_sens (editor_actions, "zoom-to-session", _("Zoom to Session"), sigc::mem_fun(*this, &Editor::temporal_zoom_session));
+	reg_sens (editor_actions, "zoom-to-extents", _("Zoom to Extents"), sigc::mem_fun(*this, &Editor::temporal_zoom_extents));
 	reg_sens (editor_actions, "zoom-to-selection", _("Zoom to Selection"), sigc::bind (sigc::mem_fun(*this, &Editor::temporal_zoom_selection), Both));
 	reg_sens (editor_actions, "zoom-to-selection-horiz", _("Zoom to Selection (Horizontal)"), sigc::bind (sigc::mem_fun(*this, &Editor::temporal_zoom_selection), Horizontal));
 	reg_sens (editor_actions, "toggle-zoom", _("Toggle Zoom State"), sigc::mem_fun(*this, &Editor::swap_visual_state));

gtk2_ardour/editor_canvas.cc

@@ -582,7 +582,7 @@ Editor::autoscroll_active () const
 }
 
 std::pair <framepos_t,framepos_t>
-Editor::session_gui_extents () const
+Editor::session_gui_extents ( bool use_extra ) const
 {
 	if (!_session) {
 		return std::pair <framepos_t,framepos_t>(max_framepos,0);
@@ -616,10 +616,12 @@ Editor::session_gui_extents () const
 	//ToDo: also incorporate automation regions (in case the session has no audio/midi but is just used for automating plugins or the like)
 
 	//add additional time to the ui extents ( user-defined in config )
-	framecnt_t const extra = UIConfiguration::instance().get_extra_ui_extents_time() * 60 * _session->nominal_frame_rate();
+	if (use_extra) {
-	session_extent_end += extra;
+		framecnt_t const extra = UIConfiguration::instance().get_extra_ui_extents_time() * 60 * _session->nominal_frame_rate();
-	session_extent_start -= extra;
+		session_extent_end += extra;
-		
+		session_extent_start -= extra;
+	}
+			
 	//range-check
 	if (session_extent_end > max_framepos) {
 		session_extent_end = max_framepos;

gtk2_ardour/editor_ops.cc

@@ -2058,6 +2058,39 @@ Editor::temporal_zoom_session ()
 	}
 }
 
+void
+Editor::temporal_zoom_extents ()
+{
+	ENSURE_GUI_THREAD (*this, &Editor::temporal_zoom_extents)
+
+	if (_session) {
+		std::pair<framepos_t, framepos_t> ext = session_gui_extents( false );  //in this case we want to zoom to the extents explicitly; ignore the users prefs for extra padding
+
+		framecnt_t start = ext.first;
+		framecnt_t end = ext.second;
+
+		if (_session->actively_recording () ) {
+			framepos_t cur = playhead_cursor->current_frame ();
+			if (cur > end) {
+				/* recording beyond the end marker; zoom out
+				 * by 5 seconds more so that if 'follow
+				 * playhead' is active we don't immediately
+				 * scroll.
+				 */
+				end = cur + _session->frame_rate() * 5;
+			}
+		}
+
+		if ((start == 0 && end == 0) || end < start) {
+			return;
+		}
+
+		calc_extra_zoom_edges(start, end);
+
+		temporal_zoom_by_frame (start, end);
+	}
+}
+
 void
 Editor::temporal_zoom_by_frame (framepos_t start, framepos_t end)
 {