Track and show individual subscriptions to input streams

TODO

@@ -72,6 +72,7 @@ DONE Embeddable rxmarbles
 >>> v1.3.0
 
 DONE Initial affordance animation in diagram
+DONE Track and show individual subscriptions to input streams
 TODO Disambiguate simultaneous marbles
   Vertically spread them
   Change example takeLast(1) to takeLast(2)

src/app-view.js

@@ -61,7 +61,7 @@ function vrenderContent(route) {
           position: 'absolute',
           top: '0'},
           pageRowLastChildStyle)}
-        ,h('x-sandbox', {key: 'sandbox', route: route, width: '820px'})
+        ,h('x-sandbox', {key: 'sandbox', route: route, width: '820px', showSubscriptions: true})
       )
     ]
   );

src/components/diagram/diagram-model.js

@@ -27,8 +27,10 @@ function applyChangeMarbleTime(diagramData, marbleDelta) {
 }
 
 function applyChangeEndTime(diagramData, endDelta) {
+  var newEnd = diagramData.get('end') + endDelta;
   return diagramData
-    .set('end', diagramData.get('end') + endDelta);
+    .set('end', newEnd)
+    .set('eventualEnd', newEnd);
 }
 
 function applyMarbleDataConstraints(marbleData) {
@@ -46,7 +48,7 @@ function applyEndTimeConstraint(diagramData) {
   newEndTime = Math.round(newEndTime);
   newEndTime = Math.min(newEndTime, 100);
   newEndTime = Math.max(0, newEndTime);
-  return diagramData.set('end', newEndTime);
+  return diagramData.set('end', newEndTime).set('eventualEnd', newEndTime);
 }
 
 function applyDiagramDataConstraints(diagramData) {
@@ -96,7 +98,8 @@ function diagramModel(properties, intent) {
       intent.changeEndTime$,
       properties.get('interactive')
     ),
-    isInteractive$: properties.get('interactive').startWith(false)
+    isInteractive$: properties.get('interactive').startWith(false),
+    isCompact$: properties.get('compact').startWith(false)
   };
 }
 

src/components/diagram/diagram-view.js

@@ -9,98 +9,177 @@ let h = Cycle.h;
 
 const MARBLE_WIDTH = 5; // estimate of a marble width, in percentages
 const diagramSidePadding = Dimens.spaceMedium;
-const diagramVerticalMargin = Dimens.spaceLarge;
 const diagramArrowThickness = '2px';
 const diagramArrowSidePadding = Dimens.spaceLarge;
 const diagramArrowHeadSize = '8px';
 const diagramArrowColor = Colors.black;
+const diagramArrowColorGhost = Colors.almostWhite;
 const diagramMarbleSize = Dimens.spaceLarge;
 const diagramCompletionHeight = '44px';
 
-const diagramStyle = mergeStyles({
-  position: 'relative',
-  display: 'block',
-  width: '100%',
-  height: `calc(${diagramMarbleSize} + 2 * ${diagramVerticalMargin})`,
-  overflow: 'visible',
-  cursor: 'default'},
-  textUnselectable
-);
-
-const diagramBodyStyle = {
-  position: 'absolute',
-  left: `calc(${diagramArrowSidePadding} + ${diagramSidePadding}
-      + (${diagramMarbleSize} / 2))`,
-  right: `calc(${diagramArrowSidePadding} + ${diagramSidePadding}
-      + (${diagramMarbleSize} / 2))`,
-  top: `calc(${diagramVerticalMargin} + (${diagramMarbleSize} / 2))`,
-  height: diagramCompletionHeight,
-  marginTop: `calc(0px - (${diagramCompletionHeight} / 2))`
-};
-
-function renderMarble(marbleData, isDraggable = false) {
+function diagramVerticalMargin(isCompact) {
+  return isCompact ? Dimens.spaceSmall : Dimens.spaceLarge;
+}
+
+function diagramStyle(isCompact) {
+  return mergeStyles({
+      position: 'relative',
+      display: 'block',
+      width: '100%',
+      height: `calc(${diagramMarbleSize} + 2 * ${diagramVerticalMargin(isCompact)})`,
+      overflow: 'visible',
+      cursor: 'default'
+    },
+    textUnselectable
+  );
+}
+
+const paddingToTimeline = `(${diagramArrowSidePadding} + ${diagramSidePadding} + (${diagramMarbleSize} / 2))`;
+const timelineSize = `(100% - (2 * ${paddingToTimeline}))`;
+function timeLeftPosition(time) {
+  return `(${paddingToTimeline} + (${timelineSize} * ${time / 100}))`;
+}
+function timeRightPosition(time) {
+  return `(${paddingToTimeline} + (${timelineSize} * ${(100 - time) / 100}))`;
+}
+
+function diagramBodyStyle(isCompact) {
+  return {
+    position: 'absolute',
+    left: `calc(${paddingToTimeline})`,
+    right: `calc(${paddingToTimeline})`,
+    top: `calc(${diagramVerticalMargin(isCompact)} + (${diagramMarbleSize} / 2))`,
+    height: diagramCompletionHeight,
+    marginTop: `calc(0px - (${diagramCompletionHeight} / 2))`
+  };
+}
+
+function renderMarble(marbleData, isDraggable = false, isGhost = false) {
   return h('x-marble.diagramMarble', {
     key: `marble${marbleData.get('id')}`,
     data: marbleData,
     isDraggable,
-    style: {size: diagramMarbleSize}
+    style: {size: diagramMarbleSize},
+    isGhost
   });
 }
 
-function renderCompletion(diagramData, isDraggable = false) {
-  let endTime = diagramData.get('end');
+function renderEndpoints(diagramData, isDraggable = false) {
+  var endpoints = [
+    renderEndpoint(diagramData, 'start', 'diagramStart', false, false),
+    renderEndpoint(diagramData, 'end', 'diagramCompletion', isDraggable, false)
+    ];
+
+  // add the eventualEndpoint if it is past the actyal end
+  if (diagramData.get('eventualEnd') > diagramData.get('end')) {
+    endpoints.push(renderEndpoint(diagramData, 'eventualEnd', 'diagramEventualEnd', false, true));
+  }
+
+  return endpoints;
+}
+
+function renderEndpoint(diagramData, timeName, endpointType, isDraggable, isGhost) {
+  let endTime = diagramData.get(timeName);
+  // do not render if the time is not defined, or it was at the end of our simulation
+  if (endTime === undefined || endTime >= 100) {
+    return undefined;
+  }
+
+  let color = isGhost ? diagramArrowColorGhost : diagramArrowColor;
+
   let isTall = diagramData.get('notifications').some(marbleData =>
-    Math.abs(marbleData.get('time') - diagramData.get('end')) <= MARBLE_WIDTH*0.5
+    Math.abs(marbleData.get('time') - endTime) <= MARBLE_WIDTH*0.5
   );
-  return h('x-diagram-completion.diagramCompletion', {
-    key: 'completion',
+  return h('x-diagram-completion.' + endpointType, {
+    key: endpointType,
     time: endTime,
     isDraggable,
     isTall,
     style: {
       thickness: diagramArrowThickness,
-      color: diagramArrowColor,
+      color: color,
       height: diagramCompletionHeight
     }
   });
 }
 
 
-function renderDiagramArrow() {
-  return h('div.diagramArrow', {style: {
-    backgroundColor: diagramArrowColor,
+function renderDiagramArrow(data, isCompact) {
+  /* render the line in 3 segments:
+   *  - to the left of 'start' render ghosted
+   *  - render between start & end normal
+   *  - to the right of 'end' render ghosted
+   */
+  const arrowStyle = {
     height: diagramArrowThickness,
     position: 'absolute',
-    top: `calc(${diagramVerticalMargin} + (${diagramMarbleSize} / 2))`,
-    left: diagramSidePadding,
-    right: diagramSidePadding
-  }});
+    top: `calc(${diagramVerticalMargin(isCompact)} + (${diagramMarbleSize} / 2))`
+  };
+  let sections = [];
+  let start = data.get('start');
+  let end = data.get('end');
+  let middleStart = diagramSidePadding;
+  let middleEnd = diagramSidePadding;
+
+  sections.push(h('div.diagramArrow', {
+    style: mergeStyles(arrowStyle, {
+      backgroundColor: diagramArrowColorGhost,
+      left: middleStart,
+      right: `calc(${timeRightPosition(start)})`
+    })
+  }));
+  middleStart = `calc(${timeLeftPosition(start)})`;
+
+  if (end < 100) {
+    sections.push(h('div.diagramArrow', {
+      style: mergeStyles(arrowStyle, {
+        backgroundColor: diagramArrowColorGhost,
+        left: `calc(${timeLeftPosition(end)})`,
+        right: middleEnd
+      })
+    }));
+    middleEnd = `calc(${timeRightPosition(end)})`;
+  }
+
+  if (start < end) {
+    sections.push(h('div.diagramArrow', {
+      style: mergeStyles(arrowStyle, {
+        backgroundColor: diagramArrowColor,
+        left: middleStart,
+        right: middleEnd
+      })
+    }));
+  }
+
+  return sections;
 }
 
-function renderDiagramArrowHead() {
+function renderDiagramArrowHead(data, isCompact) {
+  let end = data.get('end');
+  let isGhost = end < 100;
+  let color = isGhost ? diagramArrowColorGhost : diagramArrowColor;
   return h('div.diagramArrowHead', {style: {
     width: 0,
     height: 0,
     borderTop: `${diagramArrowHeadSize} solid transparent`,
     borderBottom: `${diagramArrowHeadSize} solid transparent`,
-    borderLeft: `calc(2 * ${diagramArrowHeadSize}) solid ${diagramArrowColor}`,
+    borderLeft: `calc(2 * ${diagramArrowHeadSize}) solid ${color}`,
     display: 'inline-block',
     right: `calc(${diagramSidePadding} - 1px)`,
     position: 'absolute',
-    top: `calc(${diagramVerticalMargin} + (${diagramMarbleSize} / 2)
+    top: `calc(${diagramVerticalMargin(isCompact)} + (${diagramMarbleSize} / 2)
       - ${diagramArrowHeadSize} + (${diagramArrowThickness} / 2))`
   }});
 }
 
-function renderDiagram(data, isInteractive) {
+function renderDiagram(data, isInteractive, isCompact) {
   let marblesVTree = data.get('notifications')
-    .map(notification => renderMarble(notification, isInteractive))
+    .map(notification => renderMarble(notification, isInteractive, notification.get('time') > (data.get('end') + 0.01)))
     .toArray(); // from Immutable.List
-  let completionVTree = renderCompletion(data, isInteractive);
-  return h('div', {style: diagramStyle}, [
-    renderDiagramArrow(),
-    renderDiagramArrowHead(),
-    h('div', {style: diagramBodyStyle}, [completionVTree].concat(marblesVTree))
+  return h('div', {style: diagramStyle(isCompact)}, [
+    renderDiagramArrow(data, isCompact),
+    renderDiagramArrowHead(data, isCompact),
+    h('div', {style: diagramBodyStyle(isCompact)}, renderEndpoints(data, isInteractive).concat(marblesVTree))
   ])
 }
 
@@ -149,6 +228,7 @@ function diagramView(model) {
     vtree$: Rx.Observable.combineLatest(
       animateData$(model.data$).merge(model.newData$),
       model.isInteractive$,
+      model.isCompact$,
       renderDiagram
     )
   };

src/components/marble.js

@@ -18,9 +18,9 @@ function createContainerStyle(inputStyle) {
   };
 }
 
-function renderSvg(data, isDraggable, inputStyle, isHighlighted) {
+function renderSvg(data, isDraggable, inputStyle, isHighlighted, isGhost) {
   let POSSIBLE_COLORS = [Colors.blue, Colors.green, Colors.yellow, Colors.red];
-  let color = POSSIBLE_COLORS[data.get('id') % POSSIBLE_COLORS.length];
+  let color = isGhost ? Colors.almostWhite : POSSIBLE_COLORS[data.get('id') % POSSIBLE_COLORS.length];
   return svg('svg.marbleShape', {
       style: mergeStyles({
           overflow: 'visible',
@@ -31,7 +31,7 @@ function renderSvg(data, isDraggable, inputStyle, isHighlighted) {
     [
       svg('circle', {
         style: {
-          stroke: Colors.black,
+          stroke: isGhost ? Colors.greyLight : Colors.black,
           fill: color
         },
         attributes: {
@@ -43,21 +43,27 @@ function renderSvg(data, isDraggable, inputStyle, isHighlighted) {
   );
 }
 
-function renderInnerContent(data, inputStyle) {
+function renderInnerContent(data, inputStyle, isGhost) {
+  var style = {
+    position: 'absolute',
+    width: '100%',
+    height: '100%',
+    top: '0',
+    margin: '0',
+    textAlign: 'center',
+    lineHeight: inputStyle.size
+  };
+
+  if (isGhost) {
+    style['color'] = Colors.greyLight;
+  }
+
   return h('p.marbleContent', {
-    style: mergeStyles({
-        position: 'absolute',
-        width: '100%',
-        height: '100%',
-        top: '0',
-        margin: '0',
-        textAlign: 'center',
-        lineHeight: inputStyle.size},
-      textUnselectable)
+    style: mergeStyles(style, textUnselectable)
   }, `${data.get('content')}`);
 }
 
-function render(data, isDraggable, inputStyle, isHighlighted) {
+function render(data, isDraggable, inputStyle, isHighlighted, isGhost) {
   let draggableContainerStyle = {
     cursor: 'ew-resize'
   };
@@ -69,8 +75,8 @@ function render(data, isDraggable, inputStyle, isHighlighted) {
       isDraggable ? draggableContainerStyle : null),
     attributes: {'data-marble-id': data.get('id')}
   },[
-    renderSvg(data, isDraggable, inputStyle, isHighlighted),
-    renderInnerContent(data, inputStyle)
+    renderSvg(data, isDraggable, inputStyle, isHighlighted, isGhost),
+    renderInnerContent(data, inputStyle, isGhost)
   ]);
 }
 
@@ -79,6 +85,7 @@ function marbleComponent(interactions, properties) {
   let stopHighlight$ = interactions.get('.marbleRoot', 'mouseleave');
   let data$ = properties.get('data');
   let isDraggable$ = properties.get('isDraggable').startWith(false);
+  let isGhost$ = properties.get('isGhost').startWith(false);
   let style$ = properties.get('style').startWith({});
   let isHighlighted$ = Rx.Observable.merge(
     startHighlight$.map(() => true),
@@ -87,7 +94,7 @@ function marbleComponent(interactions, properties) {
 
   return {
     vtree$: Rx.Observable.combineLatest(
-      data$, isDraggable$, style$, isHighlighted$, render
+      data$, isDraggable$, style$, isHighlighted$, isGhost$, render
     )
   };
 }

src/components/sandbox/sandbox-input.js

@@ -28,11 +28,13 @@ function prepareNotification(input, diagramId) {
 
 function prepareInputDiagram(diagram, indexInDiagramArray = 0) {
   let last = diagram[diagram.length - 1];
-  return Immutable.Map({})
+  let end = (typeof last === 'number') ? last : 100;
+  return Immutable.Map({ start: 0 })
     .set('notifications', getNotifications(diagram)
       .map(notification => prepareNotification(notification, indexInDiagramArray))
     )
-    .set('end', (typeof last === 'number') ? last : 100)
+    .set('end', end)
+    .set('eventualEnd', end)
     .set('id', indexInDiagramArray);
 }