Simplify word manager to use Range + Anchor to automatically keep marker positions up-to-date

Re-implement highlighted word manager to be simpler

services/web/public/coffee/ide/editor/directives/aceEditor/spell-check/HighlightedWordManager.coffee

@@ -13,18 +13,31 @@ define [
 	class HighlightedWordManager
 		constructor: (@editor) ->
 			@reset()
-		
+
 		reset: () ->
+			@highlights?.rows.forEach (highlight) =>
+				@editor.getSession().removeMarker(highlight.markerId)
 			@highlights = rows: []
 
 		addHighlight: (highlight) ->
 			unless highlight instanceof Highlight
 				highlight = new Highlight(highlight)
-			range = new Range(
-				highlight.row, highlight.column,
-				highlight.row, highlight.column + highlight.word.length
-			)
-			highlight.markerId = @editor.getSession().addMarker range, "spelling-highlight", 'text', false
+
+			session = @editor.getSession()
+			doc = session.getDocument()
+			# Set up Range that will automatically update it's positions when the
+			# document changes
+			range = new Range()
+			range.start = doc.createAnchor({
+				row: highlight.row,
+				column: highlight.column
+			})
+			range.end = doc.createAnchor({
+				row: highlight.row,
+				column: highlight.column + highlight.word.length
+			})
+
+			highlight.markerId = session.addMarker range, "spelling-highlight", 'text', false
 			@highlights.rows[highlight.row] ||= []
 			@highlights.rows[highlight.row].push highlight
 
@@ -34,114 +47,7 @@ define [
 				if h == highlight
 					@highlights.rows[highlight.row].splice(i, 1)
 
-		removeWord: (word) ->
-			toRemove = []
-			for row in @highlights.rows
-				for highlight in (row || [])
-					if highlight.word == word
-						toRemove.push(highlight)
-			for highlight in toRemove
+		clearRow: (row) ->
+			row = @highlights.rows[row]
+			for highlight in (row || []).slice()
 				@removeHighlight highlight
-
-		moveHighlight: (highlight, position) ->
-			@removeHighlight highlight
-			highlight.row = position.row
-			highlight.column = position.column
-			@addHighlight highlight
-
-		clearRows: (from, to) ->
-			from ||= 0
-			to ||= @highlights.rows.length - 1
-			for row in @highlights.rows.slice(from, to + 1)
-				for highlight in (row || []).slice(0)
-					@removeHighlight highlight
-
-		insertRows: (offset, number) ->
-			# rows are inserted after offset. i.e. offset row is not modified
-			affectedHighlights = []
-			for row in @highlights.rows.slice(offset)
-				affectedHighlights.push(highlight) for highlight in (row || [])
-			for highlight in affectedHighlights
-				@moveHighlight highlight,
-					row: highlight.row + number
-					column: highlight.column
-
-		removeRows: (offset, number) ->
-			# offset is the first row to delete
-			affectedHighlights = []
-			for row in @highlights.rows.slice(offset)
-				affectedHighlights.push(highlight) for highlight in (row || [])
-			for highlight in affectedHighlights
-				if highlight.row >= offset + number
-					@moveHighlight highlight,
-						row: highlight.row - number
-						column: highlight.column
-				else
-					@removeHighlight highlight
-
-		findHighlightWithinRange: (range) ->
-			rows = @highlights.rows.slice(range.start.row, range.end.row + 1)
-			for row in rows
-				for highlight in (row || [])
-					if @_doesHighlightOverlapRange(highlight, range.start, range.end)
-						return highlight
-			return null
-
-		applyChange: (change) ->
-			start = change.start
-			end = change.end
-			if change.action == "insert"
-				if start.row != end.row
-					rowsAdded = end.row - start.row
-					@insertRows start.row + 1, rowsAdded
-				# make a copy since we're going to modify in place
-				oldHighlights = (@highlights.rows[start.row] || []).slice(0)
-				for highlight in oldHighlights
-					if highlight.column > start.column
-						# insertion was fully before this highlight
-						@moveHighlight highlight,
-							row: end.row
-							column: highlight.column + (end.column - start.column)
-					else if highlight.column + highlight.word.length >= start.column
-						# insertion was inside this highlight
-						@removeHighlight highlight
-
-			else if change.action == "remove"
-				if start.row == end.row
-					oldHighlights = (@highlights.rows[start.row] || []).slice(0)
-				else
-					rowsRemoved = end.row - start.row
-					oldHighlights =
-						(@highlights.rows[start.row] || []).concat(
-							(@highlights.rows[end.row] || [])
-						)
-					@removeRows start.row + 1, rowsRemoved
-
-				for highlight in oldHighlights
-					if @_doesHighlightOverlapRange highlight, start, end
-						@removeHighlight highlight
-					else if @_isHighlightAfterRange highlight, start, end
-						@moveHighlight highlight,
-							row: start.row
-							column: highlight.column - (end.column - start.column)
-
-		_doesHighlightOverlapRange: (highlight, start, end) ->
-			highlightIsAllBeforeRange =
-				highlight.row < start.row or
-				(highlight.row == start.row and highlight.column + highlight.word.length <= start.column)
-			highlightIsAllAfterRange =
-				highlight.row > end.row or
-				(highlight.row == end.row and highlight.column >= end.column)
-			!(highlightIsAllBeforeRange or highlightIsAllAfterRange)
-
-		_isHighlightAfterRange: (highlight, start, end) ->
-			return true if highlight.row > end.row
-			return false if highlight.row < end.row
-			highlight.column >= end.column
-			
-
-
-			
-
-	
-