🐎 Remove rows to measure in the next frame

spec/lines-yardstick-spec.coffee

@@ -33,6 +33,7 @@ describe "LinesYardstick", ->
       mockPresenter =
         isBatching: -> true
         setScreenRowsToMeasure: (screenRows) -> screenRowsToMeasure = screenRows
+        clearScreenRowsToMeasure: -> setScreenRowsToMeasure = []
         getPreMeasurementState: ->
           state = {}
           for screenRow in screenRowsToMeasure

spec/text-editor-presenter-spec.coffee

@@ -114,6 +114,16 @@ describe "TextEditorPresenter", ->
         expect(stateFn(presenter).tiles[10]).toBeDefined()
         expect(stateFn(presenter).tiles[12]).toBeDefined()
 
+        presenter.clearScreenRowsToMeasure()
+
+        expect(stateFn(presenter).tiles[0]).toBeDefined()
+        expect(stateFn(presenter).tiles[2]).toBeDefined()
+        expect(stateFn(presenter).tiles[4]).toBeDefined()
+        expect(stateFn(presenter).tiles[6]).toBeDefined()
+        expect(stateFn(presenter).tiles[8]).toBeUndefined()
+        expect(stateFn(presenter).tiles[10]).toBeUndefined()
+        expect(stateFn(presenter).tiles[12]).toBeUndefined()
+
       it "excludes invalid tiles for screen rows to measure", ->
         presenter = buildPresenter(explicitHeight: 6, scrollTop: 0, lineHeight: 1, tileSize: 2)
         presenter.setScreenRowsToMeasure([20, 30]) # unexisting rows

src/lines-yardstick.coffee

@@ -17,6 +17,9 @@ class LinesYardstick
     @presenter.setScreenRowsToMeasure(screenRows)
     @lineNodesProvider.updateSync(@presenter.getPreMeasurementState())
 
+  clearScreenRowsForMeasurement: ->
+    @presenter.clearScreenRowsToMeasure()
+
   screenPositionForPixelPosition: (pixelPosition) ->
     targetTop = pixelPosition.top
     targetLeft = pixelPosition.left
@@ -75,6 +78,8 @@ class LinesYardstick
         previousColumn = column
         column += charLength
 
+    @clearScreenRowsForMeasurement()
+
     if targetLeft <= previousLeft + (charWidth / 2)
       new Point(row, previousColumn)
     else
@@ -92,6 +97,8 @@ class LinesYardstick
     top = targetRow * @model.getLineHeightInPixels()
     left = @leftPixelPositionForScreenPosition(targetRow, targetColumn)
 
+    @clearScreenRowsForMeasurement()
+
     {top, left}
 
   leftPixelPositionForScreenPosition: (row, column) ->

src/text-editor-presenter.coffee

@@ -395,6 +395,12 @@ class TextEditorPresenter
     @shouldUpdateLineNumbersState = true
     @shouldUpdateDecorations = true
 
+  clearScreenRowsToMeasure: ->
+    @screenRowsToMeasure = []
+    @shouldUpdateLinesState = true
+    @shouldUpdateLineNumbersState = true
+    @shouldUpdateDecorations = true
+
   updateTilesState: ->
     return unless @startRow? and @endRow? and @lineHeight?