fix: use Map for decorationsByMarkerId

Author: aminya

lib/mixins/decoration-management.js

@@ -37,7 +37,7 @@ export default class DecorationManagement {
      * @type {Object}
      * @access private
      */
-    this.decorationsByMarkerId = {}
+    this.decorationsByMarkerId = new Map()
     /**
      * The subscriptions to the markers `did-change` event indexed using the
      * marker id.
@@ -187,7 +187,7 @@ export default class DecorationManagement {
 
     for (let i = 0, len = markers.length; i < len; i++) {
       const marker = markers[i]
-      const decorations = this.decorationsByMarkerId[marker.id]
+      const decorations = this.decorationsByMarkerId.get(marker.id)
 
       if (decorations != null) {
         decorationsByMarkerId[marker.id] = decorations
@@ -348,7 +348,7 @@ export default class DecorationManagement {
     if (this.decorationMarkerChangedSubscriptions[id] == null) {
       this.decorationMarkerChangedSubscriptions[id] =
       marker.onDidChange((event) => {
-        const decorations = this.decorationsByMarkerId[id]
+        const decorations = this.decorationsByMarkerId.get(id)
         const screenRange = marker.getScreenRange()
 
         this.invalidateDecorationForScreenRowsCache()
@@ -395,11 +395,11 @@ export default class DecorationManagement {
 
     const decoration = new Decoration(marker, this, decorationParams)
 
-    if (this.decorationsByMarkerId[id] == null) {
-      this.decorationsByMarkerId[id] = []
+    if (!this.decorationsByMarkerId.has(id)) {
+      this.decorationsByMarkerId.set(id, [])
     }
 
-    this.decorationsByMarkerId[id].push(decoration)
+    this.decorationsByMarkerId.get(id).push(decoration)
     this.decorationsById.set(decoration.id, decoration)
 
     if (this.decorationUpdatedSubscriptions[decoration.id] == null) {
@@ -535,7 +535,7 @@ export default class DecorationManagement {
     delete this.decorationUpdatedSubscriptions[decoration.id]
     delete this.decorationDestroyedSubscriptions[decoration.id]
 
-    const decorations = this.decorationsByMarkerId[marker.id]
+    const decorations = this.decorationsByMarkerId.get(marker.id)
     if (!decorations) { return }
 
     this.emitDecorationChanges(decoration.getProperties().type, decoration)
@@ -565,7 +565,7 @@ export default class DecorationManagement {
   removeAllDecorationsForMarker (marker) {
     if (marker == null) { return }
 
-    const decorations = this.decorationsByMarkerId[marker.id]
+    const decorations = this.decorationsByMarkerId.get(marker.id)
     if (!decorations) { return }
 
     for (let i = 0, len = decorations.length; i < len; i++) {
@@ -595,7 +595,7 @@ export default class DecorationManagement {
     this.decorationMarkerChangedSubscriptions[marker.id].dispose()
     this.decorationMarkerDestroyedSubscriptions[marker.id].dispose()
 
-    delete this.decorationsByMarkerId[marker.id]
+    this.decorationsByMarkerId.delete(marker.id)
     delete this.decorationMarkerChangedSubscriptions[marker.id]
     delete this.decorationMarkerDestroyedSubscriptions[marker.id]
   }
@@ -626,7 +626,7 @@ export default class DecorationManagement {
     }
 
     this.decorationsById.clear()
-    this.decorationsByMarkerId = {}
+    this.decorationsByMarkerId.clear()
     this.decorationMarkerChangedSubscriptions = {}
     this.decorationMarkerDestroyedSubscriptions = {}
     this.decorationUpdatedSubscriptions = {}

spec/minimap-spec.js

@@ -336,7 +336,7 @@ describe('Minimap', () => {
     })
 
     it('creates a decoration for the given marker', () => {
-      expect(minimap.decorationsByMarkerId[marker.id]).toBeDefined()
+      expect(minimap.decorationsByMarkerId.get(marker.id)).toBeDefined()
     })
 
     it('creates a change corresponding to the marker range', () => {
@@ -367,7 +367,7 @@ describe('Minimap', () => {
       })
 
       it('removes the decoration from the render view', () => {
-        expect(minimap.decorationsByMarkerId[marker.id]).toBeUndefined()
+        expect(minimap.decorationsByMarkerId.get(marker.id)).toBeUndefined()
       })
 
       it('creates a change corresponding to the marker range', () => {
@@ -382,7 +382,7 @@ describe('Minimap', () => {
       })
 
       it('removes the decoration from the render view', () => {
-        expect(minimap.decorationsByMarkerId[marker.id]).toBeUndefined()
+        expect(minimap.decorationsByMarkerId.get(marker.id)).toBeUndefined()
       })
 
       it('creates a change corresponding to the marker range', () => {
@@ -397,7 +397,7 @@ describe('Minimap', () => {
       })
 
       it('removes the decoration from the render view', () => {
-        expect(minimap.decorationsByMarkerId[marker.id]).toBeUndefined()
+        expect(minimap.decorationsByMarkerId.get(marker.id)).toBeUndefined()
       })
 
       it('creates a change corresponding to the marker range', () => {
@@ -413,7 +413,7 @@ describe('Minimap', () => {
 
       it('removes all the previously added decorations', () => {
         expect(minimap.decorationsById.size).toEqual(0)
-        expect(minimap.decorationsByMarkerId).toEqual({})
+        expect(minimap.decorationsByMarkerId.size).toEqual(0)
       })
 
       it('prevents the creation of new decorations', () => {