dont show shared sidewalk corner icons at all in the editor

editor/src/objects.rs

@@ -105,6 +105,7 @@ pub struct RenderingHints {
     // Miscellaneous cases where a plugin needs to control rendering.
     pub suppress_traffic_signal_icon: Option<IntersectionID>,
     pub hide_crosswalks: HashSet<TurnID>,
+    pub hide_turn_icons: HashSet<TurnID>,
 }
 
 // For plugins and rendering. Not sure what module this should live in, here seems fine.

editor/src/plugins/traffic_signal_editor.rs

@@ -1,7 +1,7 @@
 use dimensioned::si;
 use ezgui::{Color, GfxCtx, Text, Wizard};
 use geom::{Bounds, Polygon, Pt2D};
-use map_model::{IntersectionID, TurnID, TurnPriority};
+use map_model::{IntersectionID, TurnID, TurnPriority, TurnType};
 use objects::{Ctx, ID};
 use piston::input::Key;
 use plugins::{Plugin, PluginCtx};
@@ -73,6 +73,13 @@ impl Plugin for TrafficSignalEditor {
                     ctx.primary.map.get_traffic_signal(*i).cycles[*current_cycle]
                         .get_absent_crosswalks(ctx.primary.map.get_turns_in_intersection(*i)),
                 );
+                for t in ctx.primary.map.get_turns_in_intersection(*i) {
+                    // TODO bit weird, now looks like there's missing space between some icons. Do
+                    // we ever need to have an icon for SharedSidewalkCorner?
+                    if t.turn_type == TurnType::SharedSidewalkCorner {
+                        ctx.hints.hide_turn_icons.insert(t.id);
+                    }
+                }
 
                 if cycle_duration_wizard.is_some() {
                     if let Some(new_duration) = cycle_duration_wizard

editor/src/render/turn.rs

@@ -62,6 +62,11 @@ impl Renderable for DrawTurn {
     }
 
     fn draw(&self, g: &mut GfxCtx, opts: RenderOptions, ctx: Ctx) {
+        // Some plugins hide icons entirely.
+        if ctx.hints.hide_turn_icons.contains(&self.id) {
+            return;
+        }
+
         g.draw_circle(
             ctx.cs.get("turn icon circle", Color::grey(0.3)),
             &self.icon_circle,

editor/src/ui.rs

@@ -345,6 +345,7 @@ impl UI {
             osd: Text::new(),
             suppress_traffic_signal_icon: None,
             hide_crosswalks: HashSet::new(),
+            hide_turn_icons: HashSet::new(),
         };
 
         // First update the camera and handle zoom