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</pre><div class="example-wrap"><pre class="rust ">
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">collections</span>::{<span class="ident">BTreeMap</span>, <span class="ident">HashSet</span>};

<span class="kw">use</span> <span class="ident">anyhow</span>::<span class="prelude-ty">Result</span>;

<span class="kw">use</span> <span class="ident">abstutil</span>::{<span class="ident">prettyprint_usize</span>, <span class="ident">Timer</span>};
<span class="kw">use</span> <span class="ident">geom</span>::{<span class="ident">Distance</span>, <span class="ident">FindClosest</span>, <span class="ident">PolyLine</span>, <span class="ident">Polygon</span>};
<span class="kw">use</span> <span class="ident">map_gui</span>::<span class="ident">tools</span>::{<span class="ident">nice_map_name</span>, <span class="ident">open_browser</span>, <span class="ident">CityPicker</span>, <span class="ident">ColorLegend</span>, <span class="ident">PopupMsg</span>};
<span class="kw">use</span> <span class="ident">map_gui</span>::{<span class="ident">SimpleApp</span>, <span class="ident">ID</span>};
<span class="kw">use</span> <span class="ident">map_model</span>::{<span class="ident">osm</span>, <span class="ident">RoadID</span>};
<span class="kw">use</span> <span class="ident">osm</span>::<span class="ident">WayID</span>;
<span class="kw">use</span> <span class="ident">widgetry</span>::{
    <span class="ident">lctrl</span>, <span class="ident">Choice</span>, <span class="ident">Color</span>, <span class="ident">Drawable</span>, <span class="ident">EventCtx</span>, <span class="ident">GeomBatch</span>, <span class="ident">GfxCtx</span>, <span class="ident">HorizontalAlignment</span>, <span class="ident">Key</span>, <span class="ident">Line</span>,
    <span class="ident">Menu</span>, <span class="ident">Outcome</span>, <span class="ident">Panel</span>, <span class="ident">State</span>, <span class="ident">Text</span>, <span class="ident">TextExt</span>, <span class="ident">Toggle</span>, <span class="ident">Transition</span>, <span class="ident">VerticalAlignment</span>, <span class="ident">Widget</span>,
};

<span class="kw">type</span> <span class="ident">App</span> <span class="op">=</span> <span class="ident">SimpleApp</span><span class="op">&lt;</span>()<span class="op">&gt;</span>;

<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">ParkingMapper</span> {
    <span class="ident">panel</span>: <span class="ident">Panel</span>,
    <span class="ident">draw_layer</span>: <span class="ident">Drawable</span>,
    <span class="ident">show</span>: <span class="ident">Show</span>,
    <span class="ident">selected</span>: <span class="prelude-ty">Option</span><span class="op">&lt;</span>(<span class="ident">HashSet</span><span class="op">&lt;</span><span class="ident">RoadID</span><span class="op">&gt;</span>, <span class="ident">Drawable</span>)<span class="op">&gt;</span>,

    <span class="ident">data</span>: <span class="ident">BTreeMap</span><span class="op">&lt;</span><span class="ident">WayID</span>, <span class="ident">Value</span><span class="op">&gt;</span>,
}

<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">Copy</span>, <span class="ident">PartialEq</span>, <span class="ident">Debug</span>)]</span>
<span class="kw">enum</span> <span class="ident">Show</span> {
    <span class="ident">ToDo</span>,
    <span class="ident">Done</span>,
    <span class="ident">DividedHighways</span>,
    <span class="ident">UnmappedDividedHighways</span>,
    <span class="ident">OverlappingStuff</span>,
}

<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">PartialEq</span>, <span class="ident">Clone</span>)]</span>
<span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">Value</span> {
    <span class="ident">BothSides</span>,
    <span class="ident">NoStopping</span>,
    <span class="ident">RightOnly</span>,
    <span class="ident">LeftOnly</span>,
    <span class="ident">Complicated</span>,
}

<span class="kw">impl</span> <span class="ident">ParkingMapper</span> {
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new_state</span>(<span class="ident">ctx</span>: <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">EventCtx</span>, <span class="ident">app</span>: <span class="kw-2">&amp;</span><span class="ident">App</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">Box</span><span class="op">&lt;</span><span class="kw">dyn</span> <span class="ident">State</span><span class="op">&lt;</span><span class="ident">App</span><span class="op">&gt;</span><span class="op">&gt;</span> {
        <span class="ident">ParkingMapper</span>::<span class="ident">make</span>(<span class="ident">ctx</span>, <span class="ident">app</span>, <span class="ident">Show</span>::<span class="ident">ToDo</span>, <span class="ident">BTreeMap</span>::<span class="ident">new</span>())
    }

    <span class="kw">fn</span> <span class="ident">make</span>(
        <span class="ident">ctx</span>: <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">EventCtx</span>,
        <span class="ident">app</span>: <span class="kw-2">&amp;</span><span class="ident">App</span>,
        <span class="ident">show</span>: <span class="ident">Show</span>,
        <span class="ident">data</span>: <span class="ident">BTreeMap</span><span class="op">&lt;</span><span class="ident">WayID</span>, <span class="ident">Value</span><span class="op">&gt;</span>,
    ) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">Box</span><span class="op">&lt;</span><span class="kw">dyn</span> <span class="ident">State</span><span class="op">&lt;</span><span class="ident">App</span><span class="op">&gt;</span><span class="op">&gt;</span> {
        <span class="kw">let</span> <span class="ident">map</span> <span class="op">=</span> <span class="kw-2">&amp;</span><span class="ident">app</span>.<span class="ident">map</span>;

        <span class="kw">let</span> <span class="ident">color</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">show</span> {
            <span class="ident">Show</span>::<span class="ident">ToDo</span> <span class="op">=</span><span class="op">&gt;</span> <span class="ident">Color</span>::<span class="ident">RED</span>,
            <span class="ident">Show</span>::<span class="ident">Done</span> <span class="op">=</span><span class="op">&gt;</span> <span class="ident">Color</span>::<span class="ident">BLUE</span>,
            <span class="ident">Show</span>::<span class="ident">DividedHighways</span> <span class="op">|</span> <span class="ident">Show</span>::<span class="ident">UnmappedDividedHighways</span> <span class="op">=</span><span class="op">&gt;</span> <span class="ident">Color</span>::<span class="ident">RED</span>,
            <span class="ident">Show</span>::<span class="ident">OverlappingStuff</span> <span class="op">=</span><span class="op">&gt;</span> <span class="ident">Color</span>::<span class="ident">RED</span>,
        }
        .<span class="ident">alpha</span>(<span class="number">0.5</span>);
        <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">batch</span> <span class="op">=</span> <span class="ident">GeomBatch</span>::<span class="ident">new</span>();
        <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">done</span> <span class="op">=</span> <span class="ident">HashSet</span>::<span class="ident">new</span>();
        <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">todo</span> <span class="op">=</span> <span class="ident">HashSet</span>::<span class="ident">new</span>();
        <span class="kw">for</span> <span class="ident">r</span> <span class="kw">in</span> <span class="ident">map</span>.<span class="ident">all_roads</span>() {
            <span class="kw">if</span> <span class="ident">r</span>.<span class="ident">is_light_rail</span>() {
                <span class="kw">continue</span>;
            }
            <span class="kw">if</span> <span class="ident">r</span>.<span class="ident">osm_tags</span>.<span class="ident">contains_key</span>(<span class="ident">osm</span>::<span class="ident">INFERRED_PARKING</span>)
                <span class="op">&amp;&amp;</span> <span class="op">!</span><span class="ident">data</span>.<span class="ident">contains_key</span>(<span class="kw-2">&amp;</span><span class="ident">r</span>.<span class="ident">orig_id</span>.<span class="ident">osm_way_id</span>)
            {
                <span class="ident">todo</span>.<span class="ident">insert</span>(<span class="ident">r</span>.<span class="ident">orig_id</span>.<span class="ident">osm_way_id</span>);
                <span class="kw">if</span> <span class="ident">show</span> <span class="op">=</span><span class="op">=</span> <span class="ident">Show</span>::<span class="ident">ToDo</span> {
                    <span class="ident">batch</span>.<span class="ident">push</span>(<span class="ident">color</span>, <span class="ident">map</span>.<span class="ident">get_r</span>(<span class="ident">r</span>.<span class="ident">id</span>).<span class="ident">get_thick_polygon</span>(<span class="ident">map</span>));
                }
            } <span class="kw">else</span> {
                <span class="ident">done</span>.<span class="ident">insert</span>(<span class="ident">r</span>.<span class="ident">orig_id</span>.<span class="ident">osm_way_id</span>);
                <span class="kw">if</span> <span class="ident">show</span> <span class="op">=</span><span class="op">=</span> <span class="ident">Show</span>::<span class="ident">Done</span> {
                    <span class="ident">batch</span>.<span class="ident">push</span>(<span class="ident">color</span>, <span class="ident">map</span>.<span class="ident">get_r</span>(<span class="ident">r</span>.<span class="ident">id</span>).<span class="ident">get_thick_polygon</span>(<span class="ident">map</span>));
                }
            }
        }
        <span class="kw">if</span> <span class="ident">show</span> <span class="op">=</span><span class="op">=</span> <span class="ident">Show</span>::<span class="ident">DividedHighways</span> {
            <span class="kw">for</span> <span class="ident">r</span> <span class="kw">in</span> <span class="ident">find_divided_highways</span>(<span class="ident">app</span>) {
                <span class="ident">batch</span>.<span class="ident">push</span>(<span class="ident">color</span>, <span class="ident">map</span>.<span class="ident">get_r</span>(<span class="ident">r</span>).<span class="ident">get_thick_polygon</span>(<span class="ident">map</span>));
            }
        }
        <span class="kw">if</span> <span class="ident">show</span> <span class="op">=</span><span class="op">=</span> <span class="ident">Show</span>::<span class="ident">UnmappedDividedHighways</span> {
            <span class="kw">for</span> <span class="ident">r</span> <span class="kw">in</span> <span class="ident">find_divided_highways</span>(<span class="ident">app</span>) {
                <span class="kw">let</span> <span class="ident">r</span> <span class="op">=</span> <span class="ident">map</span>.<span class="ident">get_r</span>(<span class="ident">r</span>);
                <span class="kw">if</span> <span class="op">!</span><span class="ident">r</span>.<span class="ident">osm_tags</span>.<span class="ident">is</span>(<span class="string">&quot;dual_carriageway&quot;</span>, <span class="string">&quot;yes&quot;</span>) {
                    <span class="ident">batch</span>.<span class="ident">push</span>(<span class="ident">color</span>, <span class="ident">r</span>.<span class="ident">get_thick_polygon</span>(<span class="ident">map</span>));
                }
            }
        }
        <span class="kw">if</span> <span class="ident">show</span> <span class="op">=</span><span class="op">=</span> <span class="ident">Show</span>::<span class="ident">OverlappingStuff</span> {
            <span class="ident">ctx</span>.<span class="ident">loading_screen</span>(
                <span class="string">&quot;find buildings and parking lots overlapping roads&quot;</span>,
                <span class="op">|</span><span class="kw">_</span>, <span class="kw-2">mut</span> <span class="ident">timer</span><span class="op">|</span> {
                    <span class="kw">for</span> <span class="ident">poly</span> <span class="kw">in</span> <span class="ident">find_overlapping_stuff</span>(<span class="ident">app</span>, <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">timer</span>) {
                        <span class="ident">batch</span>.<span class="ident">push</span>(<span class="ident">color</span>, <span class="ident">poly</span>);
                    }
                },
            );
        }

        <span class="comment">// Nicer display</span>
        <span class="kw">for</span> <span class="ident">i</span> <span class="kw">in</span> <span class="ident">map</span>.<span class="ident">all_intersections</span>() {
            <span class="kw">let</span> <span class="ident">is_todo</span> <span class="op">=</span> <span class="ident">i</span>.<span class="ident">roads</span>.<span class="ident">iter</span>().<span class="ident">any</span>(<span class="op">|</span><span class="ident">id</span><span class="op">|</span> {
                <span class="kw">let</span> <span class="ident">r</span> <span class="op">=</span> <span class="ident">map</span>.<span class="ident">get_r</span>(<span class="kw-2">*</span><span class="ident">id</span>);
                <span class="ident">r</span>.<span class="ident">osm_tags</span>.<span class="ident">contains_key</span>(<span class="ident">osm</span>::<span class="ident">INFERRED_PARKING</span>)
                    <span class="op">&amp;&amp;</span> <span class="op">!</span><span class="ident">data</span>.<span class="ident">contains_key</span>(<span class="kw-2">&amp;</span><span class="ident">r</span>.<span class="ident">orig_id</span>.<span class="ident">osm_way_id</span>)
            });
            <span class="kw">if</span> <span class="macro">matches</span><span class="macro">!</span>((<span class="ident">show</span>, <span class="ident">is_todo</span>), (<span class="ident">Show</span>::<span class="ident">ToDo</span>, <span class="bool-val">true</span>) <span class="op">|</span> (<span class="ident">Show</span>::<span class="ident">Done</span>, <span class="bool-val">false</span>)) {
                <span class="ident">batch</span>.<span class="ident">push</span>(<span class="ident">color</span>, <span class="ident">i</span>.<span class="ident">polygon</span>.<span class="ident">clone</span>());
            }
        }

        <span class="ident">Box</span>::<span class="ident">new</span>(<span class="ident">ParkingMapper</span> {
            <span class="ident">draw_layer</span>: <span class="ident">ctx</span>.<span class="ident">upload</span>(<span class="ident">batch</span>),
            <span class="ident">show</span>,
            <span class="ident">panel</span>: <span class="ident">Panel</span>::<span class="ident">new_builder</span>(<span class="ident">Widget</span>::<span class="ident">col</span>(<span class="macro">vec</span><span class="macro">!</span>[
                <span class="ident">Line</span>(<span class="string">&quot;Parking mapper&quot;</span>).<span class="ident">small_heading</span>().<span class="ident">into_widget</span>(<span class="ident">ctx</span>),
                <span class="ident">ctx</span>.<span class="ident">style</span>()
                    .<span class="ident">btn_popup_icon_text</span>(
                        <span class="string">&quot;system/assets/tools/map.svg&quot;</span>,
                        <span class="ident">nice_map_name</span>(<span class="ident">app</span>.<span class="ident">map</span>.<span class="ident">get_name</span>()),
                    )
                    .<span class="ident">hotkey</span>(<span class="ident">lctrl</span>(<span class="ident">Key</span>::<span class="ident">L</span>))
                    .<span class="ident">build_widget</span>(<span class="ident">ctx</span>, <span class="string">&quot;change map&quot;</span>),
                <span class="macro">format</span><span class="macro">!</span>(
                    <span class="string">&quot;{} / {} ways done (you&#39;ve mapped {})&quot;</span>,
                    <span class="ident">prettyprint_usize</span>(<span class="ident">done</span>.<span class="ident">len</span>()),
                    <span class="ident">prettyprint_usize</span>(<span class="ident">done</span>.<span class="ident">len</span>() <span class="op">+</span> <span class="ident">todo</span>.<span class="ident">len</span>()),
                    <span class="ident">data</span>.<span class="ident">len</span>()
                )
                .<span class="ident">text_widget</span>(<span class="ident">ctx</span>),
                <span class="ident">Widget</span>::<span class="ident">row</span>(<span class="macro">vec</span><span class="macro">!</span>[
                    <span class="ident">Widget</span>::<span class="ident">dropdown</span>(
                        <span class="ident">ctx</span>,
                        <span class="string">&quot;Show&quot;</span>,
                        <span class="ident">show</span>,
                        <span class="macro">vec</span><span class="macro">!</span>[
                            <span class="ident">Choice</span>::<span class="ident">new</span>(<span class="string">&quot;missing tags&quot;</span>, <span class="ident">Show</span>::<span class="ident">ToDo</span>),
                            <span class="ident">Choice</span>::<span class="ident">new</span>(<span class="string">&quot;already mapped&quot;</span>, <span class="ident">Show</span>::<span class="ident">Done</span>),
                            <span class="ident">Choice</span>::<span class="ident">new</span>(<span class="string">&quot;divided highways&quot;</span>, <span class="ident">Show</span>::<span class="ident">DividedHighways</span>).<span class="ident">tooltip</span>(
                                <span class="string">&quot;Roads divided in OSM often have the wrong number of lanes tagged&quot;</span>,
                            ),
                            <span class="ident">Choice</span>::<span class="ident">new</span>(<span class="string">&quot;unmapped divided highways&quot;</span>, <span class="ident">Show</span>::<span class="ident">UnmappedDividedHighways</span>),
                            <span class="ident">Choice</span>::<span class="ident">new</span>(
                                <span class="string">&quot;buildings and parking lots overlapping roads&quot;</span>,
                                <span class="ident">Show</span>::<span class="ident">OverlappingStuff</span>,
                            )
                            .<span class="ident">tooltip</span>(<span class="string">&quot;Roads often have the wrong number of lanes tagged&quot;</span>),
                        ],
                    ),
                    <span class="ident">ColorLegend</span>::<span class="ident">row</span>(
                        <span class="ident">ctx</span>,
                        <span class="ident">color</span>,
                        <span class="kw">match</span> <span class="ident">show</span> {
                            <span class="ident">Show</span>::<span class="ident">ToDo</span> <span class="op">=</span><span class="op">&gt;</span> <span class="string">&quot;TODO&quot;</span>,
                            <span class="ident">Show</span>::<span class="ident">Done</span> <span class="op">=</span><span class="op">&gt;</span> <span class="string">&quot;done&quot;</span>,
                            <span class="ident">Show</span>::<span class="ident">DividedHighways</span> <span class="op">=</span><span class="op">&gt;</span> <span class="string">&quot;divided highways&quot;</span>,
                            <span class="ident">Show</span>::<span class="ident">UnmappedDividedHighways</span> <span class="op">=</span><span class="op">&gt;</span> <span class="string">&quot;unmapped divided highways&quot;</span>,
                            <span class="ident">Show</span>::<span class="ident">OverlappingStuff</span> <span class="op">=</span><span class="op">&gt;</span> {
                                <span class="string">&quot;buildings and parking lots overlapping roads&quot;</span>
                            }
                        },
                    ),
                ]),
                <span class="ident">Toggle</span>::<span class="ident">checkbox</span>(<span class="ident">ctx</span>, <span class="string">&quot;max 3 days parking (default in Seattle)&quot;</span>, <span class="prelude-val">None</span>, <span class="bool-val">false</span>),
                <span class="ident">ctx</span>.<span class="ident">style</span>()
                    .<span class="ident">btn_outline</span>
                    .<span class="ident">text</span>(<span class="string">&quot;Generate OsmChange file&quot;</span>)
                    .<span class="ident">build_def</span>(<span class="ident">ctx</span>),
                <span class="string">&quot;Select a road&quot;</span>.<span class="ident">text_widget</span>(<span class="ident">ctx</span>).<span class="ident">named</span>(<span class="string">&quot;info&quot;</span>),
            ]))
            .<span class="ident">aligned</span>(<span class="ident">HorizontalAlignment</span>::<span class="ident">Right</span>, <span class="ident">VerticalAlignment</span>::<span class="ident">Top</span>)
            .<span class="ident">build</span>(<span class="ident">ctx</span>),
            <span class="ident">selected</span>: <span class="prelude-val">None</span>,
            <span class="ident">data</span>,
        })
    }
}

<span class="kw">impl</span> <span class="ident">State</span><span class="op">&lt;</span><span class="ident">App</span><span class="op">&gt;</span> <span class="kw">for</span> <span class="ident">ParkingMapper</span> {
    <span class="kw">fn</span> <span class="ident">event</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">ctx</span>: <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">EventCtx</span>, <span class="ident">app</span>: <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">App</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">Transition</span><span class="op">&lt;</span><span class="ident">App</span><span class="op">&gt;</span> {
        <span class="kw">let</span> <span class="ident">map</span> <span class="op">=</span> <span class="kw-2">&amp;</span><span class="ident">app</span>.<span class="ident">map</span>;

        <span class="ident">ctx</span>.<span class="ident">canvas_movement</span>();
        <span class="kw">if</span> <span class="ident">ctx</span>.<span class="ident">redo_mouseover</span>() {
            <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">maybe_r</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">app</span>.<span class="ident">mouseover_unzoomed_roads_and_intersections</span>(<span class="ident">ctx</span>) {
                <span class="prelude-val">Some</span>(<span class="ident">ID</span>::<span class="ident">Road</span>(<span class="ident">r</span>)) <span class="op">=</span><span class="op">&gt;</span> <span class="prelude-val">Some</span>(<span class="ident">r</span>),
                <span class="prelude-val">Some</span>(<span class="ident">ID</span>::<span class="ident">Lane</span>(<span class="ident">l</span>)) <span class="op">=</span><span class="op">&gt;</span> <span class="prelude-val">Some</span>(<span class="ident">map</span>.<span class="ident">get_l</span>(<span class="ident">l</span>).<span class="ident">parent</span>),
                <span class="kw">_</span> <span class="op">=</span><span class="op">&gt;</span> <span class="prelude-val">None</span>,
            };
            <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">r</span>) <span class="op">=</span> <span class="ident">maybe_r</span> {
                <span class="kw">if</span> <span class="ident">map</span>.<span class="ident">get_r</span>(<span class="ident">r</span>).<span class="ident">is_light_rail</span>() {
                    <span class="ident">maybe_r</span> <span class="op">=</span> <span class="prelude-val">None</span>;
                }
            }
            <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">id</span>) <span class="op">=</span> <span class="ident">maybe_r</span> {
                <span class="kw">if</span> <span class="self">self</span>
                    .<span class="ident">selected</span>
                    .<span class="ident">as_ref</span>()
                    .<span class="ident">map</span>(<span class="op">|</span>(<span class="ident">ids</span>, <span class="kw">_</span>)<span class="op">|</span> <span class="op">!</span><span class="ident">ids</span>.<span class="ident">contains</span>(<span class="kw-2">&amp;</span><span class="ident">id</span>))
                    .<span class="ident">unwrap_or</span>(<span class="bool-val">true</span>)
                {
                    <span class="comment">// Select all roads part of this way</span>
                    <span class="kw">let</span> <span class="ident">road</span> <span class="op">=</span> <span class="ident">map</span>.<span class="ident">get_r</span>(<span class="ident">id</span>);
                    <span class="kw">let</span> <span class="ident">way</span> <span class="op">=</span> <span class="ident">road</span>.<span class="ident">orig_id</span>.<span class="ident">osm_way_id</span>;
                    <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">ids</span> <span class="op">=</span> <span class="ident">HashSet</span>::<span class="ident">new</span>();
                    <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">batch</span> <span class="op">=</span> <span class="ident">GeomBatch</span>::<span class="ident">new</span>();
                    <span class="kw">for</span> <span class="ident">r</span> <span class="kw">in</span> <span class="ident">map</span>.<span class="ident">all_roads</span>() {
                        <span class="kw">if</span> <span class="ident">r</span>.<span class="ident">orig_id</span>.<span class="ident">osm_way_id</span> <span class="op">=</span><span class="op">=</span> <span class="ident">way</span> {
                            <span class="ident">ids</span>.<span class="ident">insert</span>(<span class="ident">r</span>.<span class="ident">id</span>);
                            <span class="ident">batch</span>.<span class="ident">push</span>(<span class="ident">Color</span>::<span class="ident">CYAN</span>.<span class="ident">alpha</span>(<span class="number">0.5</span>), <span class="ident">r</span>.<span class="ident">get_thick_polygon</span>(<span class="ident">map</span>));
                        }
                    }

                    <span class="self">self</span>.<span class="ident">selected</span> <span class="op">=</span> <span class="prelude-val">Some</span>((<span class="ident">ids</span>, <span class="ident">ctx</span>.<span class="ident">upload</span>(<span class="ident">batch</span>)));

                    <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">txt</span> <span class="op">=</span> <span class="ident">Text</span>::<span class="ident">new</span>();
                    <span class="ident">txt</span>.<span class="ident">add_line</span>(<span class="macro">format</span><span class="macro">!</span>(<span class="string">&quot;Click to map parking for OSM way {}&quot;</span>, <span class="ident">way</span>));
                    <span class="ident">txt</span>.<span class="ident">add_appended</span>(<span class="macro">vec</span><span class="macro">!</span>[
                        <span class="ident">Line</span>(<span class="string">&quot;Shortcut: press &quot;</span>),
                        <span class="ident">Key</span>::<span class="ident">N</span>.<span class="ident">txt</span>(<span class="ident">ctx</span>),
                        <span class="ident">Line</span>(<span class="string">&quot; to indicate no parking&quot;</span>),
                    ]);
                    <span class="ident">txt</span>.<span class="ident">add_appended</span>(<span class="macro">vec</span><span class="macro">!</span>[
                        <span class="ident">Line</span>(<span class="string">&quot;Press &quot;</span>),
                        <span class="ident">Key</span>::<span class="ident">S</span>.<span class="ident">txt</span>(<span class="ident">ctx</span>),
                        <span class="ident">Line</span>(<span class="string">&quot; to open Bing StreetSide here&quot;</span>),
                    ]);
                    <span class="ident">txt</span>.<span class="ident">add_appended</span>(<span class="macro">vec</span><span class="macro">!</span>[
                        <span class="ident">Line</span>(<span class="string">&quot;Press &quot;</span>),
                        <span class="ident">Key</span>::<span class="ident">E</span>.<span class="ident">txt</span>(<span class="ident">ctx</span>),
                        <span class="ident">Line</span>(<span class="string">&quot; to edit OpenStreetMap for this way&quot;</span>),
                    ]);
                    <span class="kw">for</span> (<span class="ident">k</span>, <span class="ident">v</span>) <span class="kw">in</span> <span class="ident">road</span>.<span class="ident">osm_tags</span>.<span class="ident">inner</span>() {
                        <span class="kw">if</span> <span class="ident">k</span>.<span class="ident">starts_with</span>(<span class="string">&quot;abst:&quot;</span>) {
                            <span class="kw">continue</span>;
                        }
                        <span class="kw">if</span> <span class="ident">k</span>.<span class="ident">contains</span>(<span class="string">&quot;parking&quot;</span>) {
                            <span class="kw">if</span> <span class="op">!</span><span class="ident">road</span>.<span class="ident">osm_tags</span>.<span class="ident">contains_key</span>(<span class="ident">osm</span>::<span class="ident">INFERRED_PARKING</span>) {
                                <span class="ident">txt</span>.<span class="ident">add_line</span>(<span class="macro">format</span><span class="macro">!</span>(<span class="string">&quot;{} = {}&quot;</span>, <span class="ident">k</span>, <span class="ident">v</span>));
                            }
                        } <span class="kw">else</span> <span class="kw">if</span> <span class="ident">k</span> <span class="op">=</span><span class="op">=</span> <span class="string">&quot;sidewalk&quot;</span> {
                            <span class="kw">if</span> <span class="op">!</span><span class="ident">road</span>.<span class="ident">osm_tags</span>.<span class="ident">contains_key</span>(<span class="ident">osm</span>::<span class="ident">INFERRED_SIDEWALKS</span>) {
                                <span class="ident">txt</span>.<span class="ident">add_line</span>(<span class="ident">Line</span>(<span class="macro">format</span><span class="macro">!</span>(<span class="string">&quot;{} = {}&quot;</span>, <span class="ident">k</span>, <span class="ident">v</span>)).<span class="ident">secondary</span>());
                            }
                        } <span class="kw">else</span> {
                            <span class="ident">txt</span>.<span class="ident">add_line</span>(<span class="ident">Line</span>(<span class="macro">format</span><span class="macro">!</span>(<span class="string">&quot;{} = {}&quot;</span>, <span class="ident">k</span>, <span class="ident">v</span>)).<span class="ident">secondary</span>());
                        }
                    }
                    <span class="self">self</span>.<span class="ident">panel</span>.<span class="ident">replace</span>(<span class="ident">ctx</span>, <span class="string">&quot;info&quot;</span>, <span class="ident">txt</span>.<span class="ident">into_widget</span>(<span class="ident">ctx</span>));
                }
            } <span class="kw">else</span> <span class="kw">if</span> <span class="self">self</span>.<span class="ident">selected</span>.<span class="ident">is_some</span>() {
                <span class="self">self</span>.<span class="ident">selected</span> <span class="op">=</span> <span class="prelude-val">None</span>;
                <span class="self">self</span>.<span class="ident">panel</span>
                    .<span class="ident">replace</span>(<span class="ident">ctx</span>, <span class="string">&quot;info&quot;</span>, <span class="string">&quot;Select a road&quot;</span>.<span class="ident">text_widget</span>(<span class="ident">ctx</span>));
            }
        }
        <span class="kw">if</span> <span class="self">self</span>.<span class="ident">selected</span>.<span class="ident">is_some</span>() <span class="op">&amp;&amp;</span> <span class="ident">ctx</span>.<span class="ident">normal_left_click</span>() {
            <span class="kw">return</span> <span class="ident">Transition</span>::<span class="ident">Push</span>(<span class="ident">ChangeWay</span>::<span class="ident">new_state</span>(
                <span class="ident">ctx</span>,
                <span class="ident">app</span>,
                <span class="kw-2">&amp;</span><span class="self">self</span>.<span class="ident">selected</span>.<span class="ident">as_ref</span>().<span class="ident">unwrap</span>().<span class="number">0</span>,
                <span class="self">self</span>.<span class="ident">show</span>,
                <span class="self">self</span>.<span class="ident">data</span>.<span class="ident">clone</span>(),
            ));
        }
        <span class="kw">if</span> <span class="self">self</span>.<span class="ident">selected</span>.<span class="ident">is_some</span>() <span class="op">&amp;&amp;</span> <span class="ident">ctx</span>.<span class="ident">input</span>.<span class="ident">pressed</span>(<span class="ident">Key</span>::<span class="ident">N</span>) {
            <span class="kw">let</span> <span class="ident">osm_way_id</span> <span class="op">=</span> <span class="ident">map</span>
                .<span class="ident">get_r</span>(<span class="kw-2">*</span><span class="self">self</span>.<span class="ident">selected</span>.<span class="ident">as_ref</span>().<span class="ident">unwrap</span>().<span class="number">0</span>.<span class="ident">iter</span>().<span class="ident">next</span>().<span class="ident">unwrap</span>())
                .<span class="ident">orig_id</span>
                .<span class="ident">osm_way_id</span>;
            <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">new_data</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">data</span>.<span class="ident">clone</span>();
            <span class="ident">new_data</span>.<span class="ident">insert</span>(<span class="ident">osm_way_id</span>, <span class="ident">Value</span>::<span class="ident">NoStopping</span>);
            <span class="kw">return</span> <span class="ident">Transition</span>::<span class="ident">Replace</span>(<span class="ident">ParkingMapper</span>::<span class="ident">make</span>(<span class="ident">ctx</span>, <span class="ident">app</span>, <span class="self">self</span>.<span class="ident">show</span>, <span class="ident">new_data</span>));
        }
        <span class="kw">if</span> <span class="self">self</span>.<span class="ident">selected</span>.<span class="ident">is_some</span>() <span class="op">&amp;&amp;</span> <span class="ident">ctx</span>.<span class="ident">input</span>.<span class="ident">pressed</span>(<span class="ident">Key</span>::<span class="ident">S</span>) {
            <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">pt</span>) <span class="op">=</span> <span class="ident">ctx</span>.<span class="ident">canvas</span>.<span class="ident">get_cursor_in_map_space</span>() {
                <span class="kw">let</span> <span class="ident">gps</span> <span class="op">=</span> <span class="ident">pt</span>.<span class="ident">to_gps</span>(<span class="ident">map</span>.<span class="ident">get_gps_bounds</span>());
                <span class="ident">open_browser</span>(<span class="macro">format</span><span class="macro">!</span>(
                    <span class="string">&quot;https://www.bing.com/maps?cp={}~{}&amp;style=x&quot;</span>,
                    <span class="ident">gps</span>.<span class="ident">y</span>(),
                    <span class="ident">gps</span>.<span class="ident">x</span>()
                ));
            }
        }
        <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>((<span class="kw-2">ref</span> <span class="ident">roads</span>, <span class="kw">_</span>)) <span class="op">=</span> <span class="self">self</span>.<span class="ident">selected</span> {
            <span class="kw">if</span> <span class="ident">ctx</span>.<span class="ident">input</span>.<span class="ident">pressed</span>(<span class="ident">Key</span>::<span class="ident">E</span>) {
                <span class="ident">open_browser</span>(<span class="macro">format</span><span class="macro">!</span>(
                    <span class="string">&quot;https://www.openstreetmap.org/edit?way={}&quot;</span>,
                    <span class="ident">map</span>.<span class="ident">get_r</span>(<span class="kw-2">*</span><span class="ident">roads</span>.<span class="ident">iter</span>().<span class="ident">next</span>().<span class="ident">unwrap</span>())
                        .<span class="ident">orig_id</span>
                        .<span class="ident">osm_way_id</span>
                        .<span class="number">0</span>
                ));
            }
        }

        <span class="kw">match</span> <span class="self">self</span>.<span class="ident">panel</span>.<span class="ident">event</span>(<span class="ident">ctx</span>) {
            <span class="ident">Outcome</span>::<span class="ident">Clicked</span>(<span class="ident">x</span>) <span class="op">=</span><span class="op">&gt;</span> <span class="kw">match</span> <span class="ident">x</span>.<span class="ident">as_ref</span>() {
                <span class="string">&quot;Generate OsmChange file&quot;</span> <span class="op">=</span><span class="op">&gt;</span> {
                    <span class="kw">if</span> <span class="self">self</span>.<span class="ident">data</span>.<span class="ident">is_empty</span>() {
                        <span class="kw">return</span> <span class="ident">Transition</span>::<span class="ident">Push</span>(<span class="ident">PopupMsg</span>::<span class="ident">new_state</span>(
                            <span class="ident">ctx</span>,
                            <span class="string">&quot;No changes yet&quot;</span>,
                            <span class="macro">vec</span><span class="macro">!</span>[<span class="string">&quot;Map some parking first&quot;</span>],
                        ));
                    }
                    <span class="kw">return</span> <span class="kw">match</span> <span class="ident">ctx</span>.<span class="ident">loading_screen</span>(<span class="string">&quot;generate OsmChange file&quot;</span>, <span class="op">|</span><span class="kw">_</span>, <span class="ident">timer</span><span class="op">|</span> {
                        <span class="ident">generate_osmc</span>(
                            <span class="kw-2">&amp;</span><span class="self">self</span>.<span class="ident">data</span>,
                            <span class="self">self</span>.<span class="ident">panel</span>
                                .<span class="ident">is_checked</span>(<span class="string">&quot;max 3 days parking (default in Seattle)&quot;</span>),
                            <span class="ident">timer</span>,
                        )
                    }) {
                        <span class="prelude-val">Ok</span>(()) <span class="op">=</span><span class="op">&gt;</span> <span class="ident">Transition</span>::<span class="ident">Push</span>(<span class="ident">PopupMsg</span>::<span class="ident">new_state</span>(
                            <span class="ident">ctx</span>,
                            <span class="string">&quot;Diff generated&quot;</span>,
                            <span class="macro">vec</span><span class="macro">!</span>[<span class="string">&quot;diff.osc created. Load it in JOSM, verify, and upload!&quot;</span>],
                        )),
                        <span class="prelude-val">Err</span>(<span class="ident">err</span>) <span class="op">=</span><span class="op">&gt;</span> <span class="ident">Transition</span>::<span class="ident">Push</span>(<span class="ident">PopupMsg</span>::<span class="ident">new_state</span>(
                            <span class="ident">ctx</span>,
                            <span class="string">&quot;Error&quot;</span>,
                            <span class="macro">vec</span><span class="macro">!</span>[<span class="macro">format</span><span class="macro">!</span>(<span class="string">&quot;{}&quot;</span>, <span class="ident">err</span>)],
                        )),
                    };
                }
                <span class="string">&quot;change map&quot;</span> <span class="op">=</span><span class="op">&gt;</span> {
                    <span class="kw">return</span> <span class="ident">Transition</span>::<span class="ident">Push</span>(<span class="ident">CityPicker</span>::<span class="ident">new_state</span>(
                        <span class="ident">ctx</span>,
                        <span class="ident">app</span>,
                        <span class="ident">Box</span>::<span class="ident">new</span>(<span class="op">|</span><span class="ident">ctx</span>, <span class="ident">app</span><span class="op">|</span> {
                            <span class="ident">Transition</span>::<span class="ident">Multi</span>(<span class="macro">vec</span><span class="macro">!</span>[
                                <span class="ident">Transition</span>::<span class="ident">Pop</span>,
                                <span class="ident">Transition</span>::<span class="ident">Replace</span>(<span class="ident">ParkingMapper</span>::<span class="ident">make</span>(
                                    <span class="ident">ctx</span>,
                                    <span class="ident">app</span>,
                                    <span class="ident">Show</span>::<span class="ident">ToDo</span>,
                                    <span class="ident">BTreeMap</span>::<span class="ident">new</span>(),
                                )),
                            ])
                        }),
                    ));
                }
                <span class="kw">_</span> <span class="op">=</span><span class="op">&gt;</span> <span class="macro">unreachable</span><span class="macro">!</span>(),
            },
            <span class="ident">Outcome</span>::<span class="ident">Changed</span>(<span class="kw">_</span>) <span class="op">=</span><span class="op">&gt;</span> {
                <span class="kw">return</span> <span class="ident">Transition</span>::<span class="ident">Replace</span>(<span class="ident">ParkingMapper</span>::<span class="ident">make</span>(
                    <span class="ident">ctx</span>,
                    <span class="ident">app</span>,
                    <span class="self">self</span>.<span class="ident">panel</span>.<span class="ident">dropdown_value</span>(<span class="string">&quot;Show&quot;</span>),
                    <span class="self">self</span>.<span class="ident">data</span>.<span class="ident">clone</span>(),
                ));
            }
            <span class="kw">_</span> <span class="op">=</span><span class="op">&gt;</span> {}
        }

        <span class="ident">Transition</span>::<span class="ident">Keep</span>
    }

    <span class="kw">fn</span> <span class="ident">draw</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">g</span>: <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">GfxCtx</span>, <span class="kw">_</span>: <span class="kw-2">&amp;</span><span class="ident">App</span>) {
        <span class="ident">g</span>.<span class="ident">redraw</span>(<span class="kw-2">&amp;</span><span class="self">self</span>.<span class="ident">draw_layer</span>);
        <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>((<span class="kw">_</span>, <span class="kw-2">ref</span> <span class="ident">roads</span>)) <span class="op">=</span> <span class="self">self</span>.<span class="ident">selected</span> {
            <span class="ident">g</span>.<span class="ident">redraw</span>(<span class="ident">roads</span>);
        }
        <span class="self">self</span>.<span class="ident">panel</span>.<span class="ident">draw</span>(<span class="ident">g</span>);
    }
}

<span class="kw">struct</span> <span class="ident">ChangeWay</span> {
    <span class="ident">panel</span>: <span class="ident">Panel</span>,
    <span class="ident">draw</span>: <span class="ident">Drawable</span>,
    <span class="ident">osm_way_id</span>: <span class="ident">WayID</span>,
    <span class="ident">data</span>: <span class="ident">BTreeMap</span><span class="op">&lt;</span><span class="ident">WayID</span>, <span class="ident">Value</span><span class="op">&gt;</span>,
    <span class="ident">show</span>: <span class="ident">Show</span>,
}

<span class="kw">impl</span> <span class="ident">ChangeWay</span> {
    <span class="kw">fn</span> <span class="ident">new_state</span>(
        <span class="ident">ctx</span>: <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">EventCtx</span>,
        <span class="ident">app</span>: <span class="kw-2">&amp;</span><span class="ident">App</span>,
        <span class="ident">selected</span>: <span class="kw-2">&amp;</span><span class="ident">HashSet</span><span class="op">&lt;</span><span class="ident">RoadID</span><span class="op">&gt;</span>,
        <span class="ident">show</span>: <span class="ident">Show</span>,
        <span class="ident">data</span>: <span class="ident">BTreeMap</span><span class="op">&lt;</span><span class="ident">WayID</span>, <span class="ident">Value</span><span class="op">&gt;</span>,
    ) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">Box</span><span class="op">&lt;</span><span class="kw">dyn</span> <span class="ident">State</span><span class="op">&lt;</span><span class="ident">App</span><span class="op">&gt;</span><span class="op">&gt;</span> {
        <span class="kw">let</span> <span class="ident">map</span> <span class="op">=</span> <span class="kw-2">&amp;</span><span class="ident">app</span>.<span class="ident">map</span>;
        <span class="kw">let</span> <span class="ident">osm_way_id</span> <span class="op">=</span> <span class="ident">map</span>
            .<span class="ident">get_r</span>(<span class="kw-2">*</span><span class="ident">selected</span>.<span class="ident">iter</span>().<span class="ident">next</span>().<span class="ident">unwrap</span>())
            .<span class="ident">orig_id</span>
            .<span class="ident">osm_way_id</span>;

        <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">batch</span> <span class="op">=</span> <span class="ident">GeomBatch</span>::<span class="ident">new</span>();
        <span class="kw">let</span> <span class="ident">thickness</span> <span class="op">=</span> <span class="ident">Distance</span>::<span class="ident">meters</span>(<span class="number">2.0</span>);
        <span class="kw">for</span> <span class="ident">id</span> <span class="kw">in</span> <span class="ident">selected</span> {
            <span class="kw">let</span> <span class="ident">r</span> <span class="op">=</span> <span class="ident">map</span>.<span class="ident">get_r</span>(<span class="kw-2">*</span><span class="ident">id</span>);
            <span class="ident">batch</span>.<span class="ident">push</span>(
                <span class="ident">Color</span>::<span class="ident">GREEN</span>,
                <span class="ident">r</span>.<span class="ident">center_pts</span>
                    .<span class="ident">must_shift_right</span>(<span class="ident">r</span>.<span class="ident">get_half_width</span>(<span class="ident">map</span>))
                    .<span class="ident">make_polygons</span>(<span class="ident">thickness</span>),
            );
            <span class="ident">batch</span>.<span class="ident">push</span>(
                <span class="ident">Color</span>::<span class="ident">BLUE</span>,
                <span class="ident">r</span>.<span class="ident">center_pts</span>
                    .<span class="ident">must_shift_left</span>(<span class="ident">r</span>.<span class="ident">get_half_width</span>(<span class="ident">map</span>))
                    .<span class="ident">make_polygons</span>(<span class="ident">thickness</span>),
            );
        }

        <span class="ident">Box</span>::<span class="ident">new</span>(<span class="ident">ChangeWay</span> {
            <span class="ident">panel</span>: <span class="ident">Panel</span>::<span class="ident">new_builder</span>(<span class="ident">Widget</span>::<span class="ident">col</span>(<span class="macro">vec</span><span class="macro">!</span>[
                <span class="ident">Widget</span>::<span class="ident">row</span>(<span class="macro">vec</span><span class="macro">!</span>[
                    <span class="ident">Line</span>(<span class="string">&quot;What kind of parking does this road have?&quot;</span>)
                        .<span class="ident">small_heading</span>()
                        .<span class="ident">into_widget</span>(<span class="ident">ctx</span>),
                    <span class="ident">ctx</span>.<span class="ident">style</span>().<span class="ident">btn_close_widget</span>(<span class="ident">ctx</span>),
                ]),
                <span class="ident">Menu</span>::<span class="ident">widget</span>(
                    <span class="ident">ctx</span>,
                    <span class="macro">vec</span><span class="macro">!</span>[
                        <span class="ident">Choice</span>::<span class="ident">new</span>(<span class="string">&quot;none -- no stopping or parking&quot;</span>, <span class="ident">Value</span>::<span class="ident">NoStopping</span>),
                        <span class="ident">Choice</span>::<span class="ident">new</span>(<span class="string">&quot;both sides&quot;</span>, <span class="ident">Value</span>::<span class="ident">BothSides</span>),
                        <span class="ident">Choice</span>::<span class="ident">new</span>(<span class="string">&quot;just on the green side&quot;</span>, <span class="ident">Value</span>::<span class="ident">RightOnly</span>),
                        <span class="ident">Choice</span>::<span class="ident">new</span>(<span class="string">&quot;just on the blue side&quot;</span>, <span class="ident">Value</span>::<span class="ident">LeftOnly</span>),
                        <span class="ident">Choice</span>::<span class="ident">new</span>(
                            <span class="string">&quot;it changes at some point along the road&quot;</span>,
                            <span class="ident">Value</span>::<span class="ident">Complicated</span>,
                        ),
                        <span class="ident">Choice</span>::<span class="ident">new</span>(<span class="string">&quot;loading zone on one or both sides&quot;</span>, <span class="ident">Value</span>::<span class="ident">Complicated</span>),
                    ],
                )
                .<span class="ident">named</span>(<span class="string">&quot;menu&quot;</span>),
            ]))
            .<span class="ident">build</span>(<span class="ident">ctx</span>),
            <span class="ident">draw</span>: <span class="ident">ctx</span>.<span class="ident">upload</span>(<span class="ident">batch</span>),
            <span class="ident">osm_way_id</span>,
            <span class="ident">data</span>,
            <span class="ident">show</span>,
        })
    }
}

<span class="kw">impl</span> <span class="ident">State</span><span class="op">&lt;</span><span class="ident">App</span><span class="op">&gt;</span> <span class="kw">for</span> <span class="ident">ChangeWay</span> {
    <span class="kw">fn</span> <span class="ident">event</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">ctx</span>: <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">EventCtx</span>, <span class="ident">app</span>: <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">App</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">Transition</span><span class="op">&lt;</span><span class="ident">App</span><span class="op">&gt;</span> {
        <span class="ident">ctx</span>.<span class="ident">canvas_movement</span>();
        <span class="kw">match</span> <span class="self">self</span>.<span class="ident">panel</span>.<span class="ident">event</span>(<span class="ident">ctx</span>) {
            <span class="ident">Outcome</span>::<span class="ident">Clicked</span>(<span class="ident">x</span>) <span class="op">=</span><span class="op">&gt;</span> <span class="kw">match</span> <span class="ident">x</span>.<span class="ident">as_ref</span>() {
                <span class="string">&quot;close&quot;</span> <span class="op">=</span><span class="op">&gt;</span> <span class="ident">Transition</span>::<span class="ident">Pop</span>,
                <span class="kw">_</span> <span class="op">=</span><span class="op">&gt;</span> {
                    <span class="kw">let</span> <span class="ident">value</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">panel</span>.<span class="ident">take_menu_choice</span>::<span class="op">&lt;</span><span class="ident">Value</span><span class="op">&gt;</span>(<span class="string">&quot;menu&quot;</span>);
                    <span class="kw">if</span> <span class="ident">value</span> <span class="op">=</span><span class="op">=</span> <span class="ident">Value</span>::<span class="ident">Complicated</span> {
                        <span class="ident">Transition</span>::<span class="ident">Replace</span>(<span class="ident">PopupMsg</span>::<span class="ident">new_state</span>(
                            <span class="ident">ctx</span>,
                            <span class="string">&quot;Complicated road&quot;</span>,
                            <span class="macro">vec</span><span class="macro">!</span>[
                                <span class="string">&quot;You&#39;ll have to manually split the way in ID or JOSM and apply \
                                 the appropriate parking tags to each section.&quot;</span>,
                            ],
                        ))
                    } <span class="kw">else</span> {
                        <span class="self">self</span>.<span class="ident">data</span>.<span class="ident">insert</span>(<span class="self">self</span>.<span class="ident">osm_way_id</span>, <span class="ident">value</span>);
                        <span class="ident">Transition</span>::<span class="ident">Multi</span>(<span class="macro">vec</span><span class="macro">!</span>[
                            <span class="ident">Transition</span>::<span class="ident">Pop</span>,
                            <span class="ident">Transition</span>::<span class="ident">Replace</span>(<span class="ident">ParkingMapper</span>::<span class="ident">make</span>(
                                <span class="ident">ctx</span>,
                                <span class="ident">app</span>,
                                <span class="self">self</span>.<span class="ident">show</span>,
                                <span class="self">self</span>.<span class="ident">data</span>.<span class="ident">clone</span>(),
                            )),
                        ])
                    }
                }
            },
            <span class="kw">_</span> <span class="op">=</span><span class="op">&gt;</span> {
                <span class="kw">if</span> <span class="ident">ctx</span>.<span class="ident">normal_left_click</span>() <span class="op">&amp;&amp;</span> <span class="ident">ctx</span>.<span class="ident">canvas</span>.<span class="ident">get_cursor_in_screen_space</span>().<span class="ident">is_none</span>() {
                    <span class="kw">return</span> <span class="ident">Transition</span>::<span class="ident">Pop</span>;
                }
                <span class="ident">Transition</span>::<span class="ident">Keep</span>
            }
        }
    }

    <span class="kw">fn</span> <span class="ident">draw</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">g</span>: <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">GfxCtx</span>, <span class="kw">_</span>: <span class="kw-2">&amp;</span><span class="ident">App</span>) {
        <span class="ident">g</span>.<span class="ident">redraw</span>(<span class="kw-2">&amp;</span><span class="self">self</span>.<span class="ident">draw</span>);
        <span class="self">self</span>.<span class="ident">panel</span>.<span class="ident">draw</span>(<span class="ident">g</span>);
    }
}

<span class="kw">fn</span> <span class="ident">generate_osmc</span>(<span class="ident">data</span>: <span class="kw-2">&amp;</span><span class="ident">BTreeMap</span><span class="op">&lt;</span><span class="ident">WayID</span>, <span class="ident">Value</span><span class="op">&gt;</span>, <span class="ident">in_seattle</span>: <span class="ident">bool</span>, <span class="ident">timer</span>: <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">Timer</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="prelude-ty">Result</span><span class="op">&lt;</span>()<span class="op">&gt;</span> {
    <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">fs</span>::<span class="ident">File</span>;
    <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">io</span>::<span class="ident">Write</span>;

    <span class="kw">use</span> <span class="ident">abstutil</span>::<span class="ident">Tags</span>;

    <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">modified_ways</span> <span class="op">=</span> <span class="ident">Vec</span>::<span class="ident">new</span>();
    <span class="ident">timer</span>.<span class="ident">start_iter</span>(<span class="string">&quot;fetch latest OSM data per modified way&quot;</span>, <span class="ident">data</span>.<span class="ident">len</span>());
    <span class="kw">for</span> (<span class="ident">way</span>, <span class="ident">value</span>) <span class="kw">in</span> <span class="ident">data</span> {
        <span class="ident">timer</span>.<span class="ident">next</span>();
        <span class="kw">if</span> <span class="ident">value</span> <span class="op">=</span><span class="op">=</span> <span class="kw-2">&amp;</span><span class="ident">Value</span>::<span class="ident">Complicated</span> {
            <span class="kw">continue</span>;
        }

        <span class="kw">let</span> <span class="ident">url</span> <span class="op">=</span> <span class="macro">format</span><span class="macro">!</span>(<span class="string">&quot;https://api.openstreetmap.org/api/0.6/way/{}&quot;</span>, <span class="ident">way</span>.<span class="number">0</span>);
        <span class="macro">info</span><span class="macro">!</span>(<span class="string">&quot;Fetching {}&quot;</span>, <span class="ident">url</span>);
        <span class="kw">let</span> <span class="ident">resp</span> <span class="op">=</span> <span class="ident">reqwest</span>::<span class="ident">blocking</span>::<span class="ident">get</span>(<span class="kw-2">&amp;</span><span class="ident">url</span>)<span class="question-mark">?</span>.<span class="ident">text</span>()<span class="question-mark">?</span>;
        <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">tree</span> <span class="op">=</span> <span class="ident">xmltree</span>::<span class="ident">Element</span>::<span class="ident">parse</span>(<span class="ident">resp</span>.<span class="ident">as_bytes</span>())<span class="question-mark">?</span>
            .<span class="ident">take_child</span>(<span class="string">&quot;way&quot;</span>)
            .<span class="ident">unwrap</span>();
        <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">osm_tags</span> <span class="op">=</span> <span class="ident">Tags</span>::<span class="ident">empty</span>();
        <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">other_children</span> <span class="op">=</span> <span class="ident">Vec</span>::<span class="ident">new</span>();
        <span class="kw">for</span> <span class="ident">node</span> <span class="kw">in</span> <span class="ident">tree</span>.<span class="ident">children</span>.<span class="ident">drain</span>(..) {
            <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">elem</span>) <span class="op">=</span> <span class="ident">node</span>.<span class="ident">as_element</span>() {
                <span class="kw">if</span> <span class="ident">elem</span>.<span class="ident">name</span> <span class="op">=</span><span class="op">=</span> <span class="string">&quot;tag&quot;</span> {
                    <span class="ident">osm_tags</span>.<span class="ident">insert</span>(<span class="ident">elem</span>.<span class="ident">attributes</span>[<span class="string">&quot;k&quot;</span>].<span class="ident">clone</span>(), <span class="ident">elem</span>.<span class="ident">attributes</span>[<span class="string">&quot;v&quot;</span>].<span class="ident">clone</span>());
                    <span class="kw">continue</span>;
                }
            }
            <span class="ident">other_children</span>.<span class="ident">push</span>(<span class="ident">node</span>);
        }

        <span class="comment">// Fill out the tags.</span>
        <span class="ident">osm_tags</span>.<span class="ident">remove</span>(<span class="ident">osm</span>::<span class="ident">PARKING_LEFT</span>);
        <span class="ident">osm_tags</span>.<span class="ident">remove</span>(<span class="ident">osm</span>::<span class="ident">PARKING_RIGHT</span>);
        <span class="ident">osm_tags</span>.<span class="ident">remove</span>(<span class="ident">osm</span>::<span class="ident">PARKING_BOTH</span>);
        <span class="kw">match</span> <span class="ident">value</span> {
            <span class="ident">Value</span>::<span class="ident">BothSides</span> <span class="op">=</span><span class="op">&gt;</span> {
                <span class="ident">osm_tags</span>.<span class="ident">insert</span>(<span class="ident">osm</span>::<span class="ident">PARKING_BOTH</span>, <span class="string">&quot;parallel&quot;</span>);
                <span class="kw">if</span> <span class="ident">in_seattle</span> {
                    <span class="ident">osm_tags</span>.<span class="ident">insert</span>(<span class="string">&quot;parking:condition:both:maxstay&quot;</span>, <span class="string">&quot;3 days&quot;</span>);
                }
            }
            <span class="ident">Value</span>::<span class="ident">NoStopping</span> <span class="op">=</span><span class="op">&gt;</span> {
                <span class="ident">osm_tags</span>.<span class="ident">insert</span>(<span class="ident">osm</span>::<span class="ident">PARKING_BOTH</span>, <span class="string">&quot;no_stopping&quot;</span>);
            }
            <span class="ident">Value</span>::<span class="ident">RightOnly</span> <span class="op">=</span><span class="op">&gt;</span> {
                <span class="ident">osm_tags</span>.<span class="ident">insert</span>(<span class="ident">osm</span>::<span class="ident">PARKING_RIGHT</span>, <span class="string">&quot;parallel&quot;</span>);
                <span class="ident">osm_tags</span>.<span class="ident">insert</span>(<span class="ident">osm</span>::<span class="ident">PARKING_LEFT</span>, <span class="string">&quot;no_stopping&quot;</span>);
                <span class="kw">if</span> <span class="ident">in_seattle</span> {
                    <span class="ident">osm_tags</span>.<span class="ident">insert</span>(<span class="string">&quot;parking:condition:right:maxstay&quot;</span>, <span class="string">&quot;3 days&quot;</span>);
                }
            }
            <span class="ident">Value</span>::<span class="ident">LeftOnly</span> <span class="op">=</span><span class="op">&gt;</span> {
                <span class="ident">osm_tags</span>.<span class="ident">insert</span>(<span class="ident">osm</span>::<span class="ident">PARKING_LEFT</span>, <span class="string">&quot;parallel&quot;</span>);
                <span class="ident">osm_tags</span>.<span class="ident">insert</span>(<span class="ident">osm</span>::<span class="ident">PARKING_RIGHT</span>, <span class="string">&quot;no_stopping&quot;</span>);
                <span class="kw">if</span> <span class="ident">in_seattle</span> {
                    <span class="ident">osm_tags</span>.<span class="ident">insert</span>(<span class="string">&quot;parking:condition:left:maxstay&quot;</span>, <span class="string">&quot;3 days&quot;</span>);
                }
            }
            <span class="ident">Value</span>::<span class="ident">Complicated</span> <span class="op">=</span><span class="op">&gt;</span> <span class="macro">unreachable</span><span class="macro">!</span>(),
        }

        <span class="ident">tree</span>.<span class="ident">children</span> <span class="op">=</span> <span class="ident">other_children</span>;
        <span class="kw">for</span> (<span class="ident">k</span>, <span class="ident">v</span>) <span class="kw">in</span> <span class="ident">osm_tags</span>.<span class="ident">inner</span>() {
            <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">new_elem</span> <span class="op">=</span> <span class="ident">xmltree</span>::<span class="ident">Element</span>::<span class="ident">new</span>(<span class="string">&quot;tag&quot;</span>);
            <span class="ident">new_elem</span>.<span class="ident">attributes</span>.<span class="ident">insert</span>(<span class="string">&quot;k&quot;</span>.<span class="ident">to_string</span>(), <span class="ident">k</span>.<span class="ident">to_string</span>());
            <span class="ident">new_elem</span>.<span class="ident">attributes</span>.<span class="ident">insert</span>(<span class="string">&quot;v&quot;</span>.<span class="ident">to_string</span>(), <span class="ident">v</span>.<span class="ident">to_string</span>());
            <span class="ident">tree</span>.<span class="ident">children</span>.<span class="ident">push</span>(<span class="ident">xmltree</span>::<span class="ident">XMLNode</span>::<span class="ident">Element</span>(<span class="ident">new_elem</span>));
        }

        <span class="ident">tree</span>.<span class="ident">attributes</span>.<span class="ident">remove</span>(<span class="string">&quot;timestamp&quot;</span>);
        <span class="ident">tree</span>.<span class="ident">attributes</span>.<span class="ident">remove</span>(<span class="string">&quot;changeset&quot;</span>);
        <span class="ident">tree</span>.<span class="ident">attributes</span>.<span class="ident">remove</span>(<span class="string">&quot;user&quot;</span>);
        <span class="ident">tree</span>.<span class="ident">attributes</span>.<span class="ident">remove</span>(<span class="string">&quot;uid&quot;</span>);
        <span class="ident">tree</span>.<span class="ident">attributes</span>.<span class="ident">remove</span>(<span class="string">&quot;visible&quot;</span>);

        <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">bytes</span>: <span class="ident">Vec</span><span class="op">&lt;</span><span class="ident">u8</span><span class="op">&gt;</span> <span class="op">=</span> <span class="ident">Vec</span>::<span class="ident">new</span>();
        <span class="ident">tree</span>.<span class="ident">write</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">bytes</span>)<span class="question-mark">?</span>;
        <span class="kw">let</span> <span class="ident">out</span> <span class="op">=</span> <span class="ident">String</span>::<span class="ident">from_utf8</span>(<span class="ident">bytes</span>)<span class="question-mark">?</span>;
        <span class="kw">let</span> <span class="ident">stripped</span> <span class="op">=</span> <span class="ident">out</span>.<span class="ident">trim_start_matches</span>(<span class="string">&quot;&lt;?xml version=\&quot;1.0\&quot; encoding=\&quot;UTF-8\&quot;?&gt;&quot;</span>);
        <span class="ident">modified_ways</span>.<span class="ident">push</span>(<span class="ident">stripped</span>.<span class="ident">to_string</span>());
    }

    <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">f</span> <span class="op">=</span> <span class="ident">File</span>::<span class="ident">create</span>(<span class="string">&quot;diff.osc&quot;</span>)<span class="question-mark">?</span>;
    <span class="macro">writeln</span><span class="macro">!</span>(<span class="ident">f</span>, <span class="string">&quot;&lt;osmChange version=\&quot;0.6\&quot; generator=\&quot;abst\&quot;&gt;&lt;modify&gt;&quot;</span>)<span class="question-mark">?</span>;
    <span class="kw">for</span> <span class="ident">w</span> <span class="kw">in</span> <span class="ident">modified_ways</span> {
        <span class="macro">writeln</span><span class="macro">!</span>(<span class="ident">f</span>, <span class="string">&quot;  {}&quot;</span>, <span class="ident">w</span>)<span class="question-mark">?</span>;
    }
    <span class="macro">writeln</span><span class="macro">!</span>(<span class="ident">f</span>, <span class="string">&quot;&lt;/modify&gt;&lt;/osmChange&gt;&quot;</span>)<span class="question-mark">?</span>;
    <span class="macro">info</span><span class="macro">!</span>(<span class="string">&quot;Wrote diff.osc&quot;</span>);
    <span class="prelude-val">Ok</span>(())
}

<span class="kw">fn</span> <span class="ident">find_divided_highways</span>(<span class="ident">app</span>: <span class="kw-2">&amp;</span><span class="ident">App</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">HashSet</span><span class="op">&lt;</span><span class="ident">RoadID</span><span class="op">&gt;</span> {
    <span class="kw">let</span> <span class="ident">map</span> <span class="op">=</span> <span class="kw-2">&amp;</span><span class="ident">app</span>.<span class="ident">map</span>;
    <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">closest</span>: <span class="ident">FindClosest</span><span class="op">&lt;</span><span class="ident">RoadID</span><span class="op">&gt;</span> <span class="op">=</span> <span class="ident">FindClosest</span>::<span class="ident">new</span>(<span class="ident">map</span>.<span class="ident">get_bounds</span>());
    <span class="comment">// TODO Consider not even filtering by oneway. I keep finding mistakes where people split a</span>
    <span class="comment">// road, but didn&#39;t mark one side oneway!</span>
    <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">oneways</span> <span class="op">=</span> <span class="ident">Vec</span>::<span class="ident">new</span>();
    <span class="kw">for</span> <span class="ident">r</span> <span class="kw">in</span> <span class="ident">map</span>.<span class="ident">all_roads</span>() {
        <span class="kw">if</span> <span class="ident">r</span>.<span class="ident">osm_tags</span>.<span class="ident">contains_key</span>(<span class="string">&quot;oneway&quot;</span>) {
            <span class="ident">closest</span>.<span class="ident">add</span>(<span class="ident">r</span>.<span class="ident">id</span>, <span class="ident">r</span>.<span class="ident">center_pts</span>.<span class="ident">points</span>());
            <span class="ident">oneways</span>.<span class="ident">push</span>(<span class="ident">r</span>.<span class="ident">id</span>);
        }
    }

    <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">found</span> <span class="op">=</span> <span class="ident">HashSet</span>::<span class="ident">new</span>();
    <span class="kw">for</span> <span class="ident">r1</span> <span class="kw">in</span> <span class="ident">oneways</span> {
        <span class="kw">let</span> <span class="ident">r1</span> <span class="op">=</span> <span class="ident">map</span>.<span class="ident">get_r</span>(<span class="ident">r1</span>);
        <span class="kw">for</span> <span class="kw-2">&amp;</span><span class="ident">dist</span> <span class="kw">in</span> <span class="kw-2">&amp;</span>[
            <span class="ident">Distance</span>::<span class="ident">ZERO</span>,
            <span class="ident">r1</span>.<span class="ident">center_pts</span>.<span class="ident">length</span>() <span class="op">/</span> <span class="number">2.0</span>,
            <span class="ident">r1</span>.<span class="ident">center_pts</span>.<span class="ident">length</span>(),
        ] {
            <span class="kw">let</span> (<span class="ident">pt</span>, <span class="ident">angle</span>) <span class="op">=</span> <span class="ident">r1</span>.<span class="ident">center_pts</span>.<span class="ident">must_dist_along</span>(<span class="ident">dist</span>);
            <span class="kw">for</span> (<span class="ident">r2</span>, <span class="kw">_</span>, <span class="kw">_</span>) <span class="kw">in</span> <span class="ident">closest</span>.<span class="ident">all_close_pts</span>(<span class="ident">pt</span>, <span class="ident">Distance</span>::<span class="ident">meters</span>(<span class="number">250.0</span>)) {
                <span class="kw">if</span> <span class="ident">r1</span>.<span class="ident">id</span> <span class="op">!</span><span class="op">=</span> <span class="ident">r2</span>
                    <span class="op">&amp;&amp;</span> <span class="ident">PolyLine</span>::<span class="ident">must_new</span>(<span class="macro">vec</span><span class="macro">!</span>[
                        <span class="ident">pt</span>.<span class="ident">project_away</span>(<span class="ident">Distance</span>::<span class="ident">meters</span>(<span class="number">100.0</span>), <span class="ident">angle</span>.<span class="ident">rotate_degs</span>(<span class="number">90.0</span>)),
                        <span class="ident">pt</span>.<span class="ident">project_away</span>(<span class="ident">Distance</span>::<span class="ident">meters</span>(<span class="number">100.0</span>), <span class="ident">angle</span>.<span class="ident">rotate_degs</span>(<span class="op">-</span><span class="number">90.0</span>)),
                    ])
                    .<span class="ident">intersection</span>(<span class="kw-2">&amp;</span><span class="ident">map</span>.<span class="ident">get_r</span>(<span class="ident">r2</span>).<span class="ident">center_pts</span>)
                    .<span class="ident">is_some</span>()
                    <span class="op">&amp;&amp;</span> <span class="ident">r1</span>.<span class="ident">get_name</span>(<span class="ident">app</span>.<span class="ident">opts</span>.<span class="ident">language</span>.<span class="ident">as_ref</span>())
                        <span class="op">=</span><span class="op">=</span> <span class="ident">map</span>.<span class="ident">get_r</span>(<span class="ident">r2</span>).<span class="ident">get_name</span>(<span class="ident">app</span>.<span class="ident">opts</span>.<span class="ident">language</span>.<span class="ident">as_ref</span>())
                {
                    <span class="ident">found</span>.<span class="ident">insert</span>(<span class="ident">r1</span>.<span class="ident">id</span>);
                    <span class="ident">found</span>.<span class="ident">insert</span>(<span class="ident">r2</span>);
                }
            }
        }
    }
    <span class="ident">found</span>
}

<span class="comment">// TODO Lots of false positives here... why?</span>
<span class="kw">fn</span> <span class="ident">find_overlapping_stuff</span>(<span class="ident">app</span>: <span class="kw-2">&amp;</span><span class="ident">App</span>, <span class="ident">timer</span>: <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">Timer</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">Vec</span><span class="op">&lt;</span><span class="ident">Polygon</span><span class="op">&gt;</span> {
    <span class="kw">let</span> <span class="ident">map</span> <span class="op">=</span> <span class="kw-2">&amp;</span><span class="ident">app</span>.<span class="ident">map</span>;
    <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">closest</span>: <span class="ident">FindClosest</span><span class="op">&lt;</span><span class="ident">RoadID</span><span class="op">&gt;</span> <span class="op">=</span> <span class="ident">FindClosest</span>::<span class="ident">new</span>(<span class="ident">map</span>.<span class="ident">get_bounds</span>());
    <span class="kw">for</span> <span class="ident">r</span> <span class="kw">in</span> <span class="ident">map</span>.<span class="ident">all_roads</span>() {
        <span class="kw">if</span> <span class="ident">r</span>.<span class="ident">osm_tags</span>.<span class="ident">contains_key</span>(<span class="string">&quot;tunnel&quot;</span>) {
            <span class="kw">continue</span>;
        }
        <span class="ident">closest</span>.<span class="ident">add</span>(<span class="ident">r</span>.<span class="ident">id</span>, <span class="ident">r</span>.<span class="ident">center_pts</span>.<span class="ident">points</span>());
    }

    <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">polygons</span> <span class="op">=</span> <span class="ident">Vec</span>::<span class="ident">new</span>();

    <span class="ident">timer</span>.<span class="ident">start_iter</span>(<span class="string">&quot;check buildings&quot;</span>, <span class="ident">map</span>.<span class="ident">all_buildings</span>().<span class="ident">len</span>());
    <span class="kw">for</span> <span class="ident">b</span> <span class="kw">in</span> <span class="ident">map</span>.<span class="ident">all_buildings</span>() {
        <span class="ident">timer</span>.<span class="ident">next</span>();
        <span class="kw">for</span> (<span class="ident">r</span>, <span class="kw">_</span>, <span class="kw">_</span>) <span class="kw">in</span> <span class="ident">closest</span>.<span class="ident">all_close_pts</span>(<span class="ident">b</span>.<span class="ident">label_center</span>, <span class="ident">Distance</span>::<span class="ident">meters</span>(<span class="number">500.0</span>)) {
            <span class="kw">if</span> <span class="op">!</span><span class="ident">b</span>
                .<span class="ident">polygon</span>
                .<span class="ident">intersection</span>(<span class="kw-2">&amp;</span><span class="ident">map</span>.<span class="ident">get_r</span>(<span class="ident">r</span>).<span class="ident">get_thick_polygon</span>(<span class="ident">map</span>))
                .<span class="ident">is_empty</span>()
            {
                <span class="ident">polygons</span>.<span class="ident">push</span>(<span class="ident">b</span>.<span class="ident">polygon</span>.<span class="ident">clone</span>());
            }
        }
    }

    <span class="ident">timer</span>.<span class="ident">start_iter</span>(<span class="string">&quot;check parking lots&quot;</span>, <span class="ident">map</span>.<span class="ident">all_parking_lots</span>().<span class="ident">len</span>());
    <span class="kw">for</span> <span class="ident">pl</span> <span class="kw">in</span> <span class="ident">map</span>.<span class="ident">all_parking_lots</span>() {
        <span class="ident">timer</span>.<span class="ident">next</span>();
        <span class="kw">for</span> (<span class="ident">r</span>, <span class="kw">_</span>, <span class="kw">_</span>) <span class="kw">in</span> <span class="ident">closest</span>.<span class="ident">all_close_pts</span>(<span class="ident">pl</span>.<span class="ident">polygon</span>.<span class="ident">center</span>(), <span class="ident">Distance</span>::<span class="ident">meters</span>(<span class="number">500.0</span>)) {
            <span class="kw">if</span> <span class="op">!</span><span class="ident">pl</span>
                .<span class="ident">polygon</span>
                .<span class="ident">intersection</span>(<span class="kw-2">&amp;</span><span class="ident">map</span>.<span class="ident">get_r</span>(<span class="ident">r</span>).<span class="ident">get_thick_polygon</span>(<span class="ident">map</span>))
                .<span class="ident">is_empty</span>()
            {
                <span class="ident">polygons</span>.<span class="ident">push</span>(<span class="ident">pl</span>.<span class="ident">polygon</span>.<span class="ident">clone</span>());
            }
        }
    }

    <span class="ident">polygons</span>
}
</pre></div>
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