Make decorationsForScreenRowRange return all decorations

Even if they are for markers that aren't on the default marker layer

spec/decoration-manager-spec.coffee

@@ -1,12 +1,13 @@
 DecorationManager = require '../src/decoration-manager'
 
 describe "DecorationManager", ->
-  [decorationManager, buffer, defaultMarkerLayer, displayLayer] = []
+  [decorationManager, buffer, defaultMarkerLayer, displayLayer, otherMarkerLayer] = []
 
   beforeEach ->
     buffer = atom.project.bufferForPathSync('sample.js')
     displayLayer = buffer.addDisplayLayer()
     defaultMarkerLayer = displayLayer.addMarkerLayer()
+    otherMarkerLayer = displayLayer.addMarkerLayer()
     decorationManager = new DecorationManager(displayLayer, defaultMarkerLayer)
 
     waitsForPromise ->
@@ -17,21 +18,29 @@ describe "DecorationManager", ->
     buffer.release()
 
   describe "decorations", ->
-    [marker, decoration, decorationProperties] = []
+    [marker, layerMarker, decoration, layerMarkerDecoration, decorationProperties] = []
     beforeEach ->
       marker = defaultMarkerLayer.markBufferRange([[2, 13], [3, 15]])
       decorationProperties = {type: 'line-number', class: 'one'}
       decoration = decorationManager.decorateMarker(marker, decorationProperties)
+      layerMarker = otherMarkerLayer.markBufferRange([[2, 13], [3, 15]])
+      layerMarkerDecoration = decorationManager.decorateMarker(layerMarker, decorationProperties)
 
     it "can add decorations associated with markers and remove them", ->
       expect(decoration).toBeDefined()
       expect(decoration.getProperties()).toBe decorationProperties
       expect(decorationManager.decorationForId(decoration.id)).toBe decoration
-      expect(decorationManager.decorationsForScreenRowRange(2, 3)[marker.id][0]).toBe decoration
+      expect(decorationManager.decorationsForScreenRowRange(2, 3)).toEqual {
+        "#{marker.id}": [decoration],
+        "#{layerMarker.id}": [layerMarkerDecoration]
+      }
 
       decoration.destroy()
       expect(decorationManager.decorationsForScreenRowRange(2, 3)[marker.id]).not.toBeDefined()
       expect(decorationManager.decorationForId(decoration.id)).not.toBeDefined()
+      layerMarkerDecoration.destroy()
+      expect(decorationManager.decorationsForScreenRowRange(2, 3)[layerMarker.id]).not.toBeDefined()
+      expect(decorationManager.decorationForId(layerMarkerDecoration.id)).not.toBeDefined()
 
     it "will not fail if the decoration is removed twice", ->
       decoration.destroy()
@@ -63,9 +72,9 @@ describe "DecorationManager", ->
 
     describe "::getDecorations(properties)", ->
       it "returns decorations matching the given optional properties", ->
-        expect(decorationManager.getDecorations()).toEqual [decoration]
+        expect(decorationManager.getDecorations()).toEqual [decoration, layerMarkerDecoration]
         expect(decorationManager.getDecorations(class: 'two').length).toEqual 0
-        expect(decorationManager.getDecorations(class: 'one').length).toEqual 1
+        expect(decorationManager.getDecorations(class: 'one').length).toEqual 2
 
   describe "::decorateMarker", ->
     describe "when decorating gutters", ->

spec/text-editor-component-spec.js

@@ -1747,11 +1747,13 @@ describe('TextEditorComponent', function () {
   })
 
   describe('block decorations rendering', function () {
+    let markerLayer
+
     function createBlockDecorationBeforeScreenRow(screenRow, {className}) {
       let item = document.createElement("div")
       item.className = className || ""
       let blockDecoration = editor.decorateMarker(
-        editor.markScreenPosition([screenRow, 0], {invalidate: "never"}),
+        markerLayer.markScreenPosition([screenRow, 0], {invalidate: "never"}),
         {type: "block", item: item, position: "before"}
       )
       return [item, blockDecoration]
@@ -1761,13 +1763,14 @@ describe('TextEditorComponent', function () {
       let item = document.createElement("div")
       item.className = className || ""
       let blockDecoration = editor.decorateMarker(
-        editor.markScreenPosition([screenRow, 0], {invalidate: "never"}),
+        markerLayer.markScreenPosition([screenRow, 0], {invalidate: "never"}),
         {type: "block", item: item, position: "after"}
       )
       return [item, blockDecoration]
     }
 
     beforeEach(function () {
+      markerLayer = editor.addMarkerLayer()
       wrapperNode.style.height = 5 * lineHeightInPixels + 'px'
       editor.update({autoHeight: false})
       component.measureDimensions()

src/decoration-manager.coffee

@@ -71,7 +71,9 @@ class DecorationManager extends Model
 
   decorationsForScreenRowRange: (startScreenRow, endScreenRow) ->
     decorationsByMarkerId = {}
-    for marker in @defaultMarkerLayer.findMarkers(intersectsScreenRowRange: [startScreenRow, endScreenRow])
+    for layerId of @decorationCountsByLayerId
+      layer = @displayLayer.getMarkerLayer(layerId)
+      for marker in layer.findMarkers(intersectsScreenRowRange: [startScreenRow, endScreenRow])
         if decorations = @decorationsByMarkerId[marker.id]
           decorationsByMarkerId[marker.id] = decorations
     decorationsByMarkerId