Store grammar overrides on project

src/app/grammar-view.coffee

@@ -42,9 +42,9 @@ class GrammarView extends SelectList
   confirmed: (grammar) ->
     @cancel()
     if grammar is @autoDetect
-      syntax.removeGrammarForPath(@path)
+      rootView.project.removeGrammarOverrideForPath(@path)
     else
-      syntax.addGrammarForPath(@path, grammar)
+      rootView.project.addGrammarOverrideForPath(@path, grammar)
     @editor.reloadGrammar()
 
   attach: ->

src/app/language-mode.coffee

@@ -48,7 +48,7 @@ class LanguageMode
         false
 
   reloadGrammar: ->
-    @grammar = syntax.grammarForFilePath(@buffer.getPath())
+    @grammar = rootView.project.grammarForFilePath(@buffer.getPath())
 
   isQuote: (string) ->
     /'|"/.test(string)

src/app/project.coffee

@@ -18,6 +18,7 @@ class Project
   rootDirectory: null
   editSessions: null
   ignoredPathRegexes: null
+  grammarOverridesByPath: {}
 
   constructor: (path) ->
     @setPath(path)
@@ -27,6 +28,16 @@ class Project
   destroy: ->
     editSession.destroy() for editSession in @getEditSessions()
 
+  addGrammarOverrideForPath: (path, grammar) ->
+    @grammarOverridesByPath[path] = grammar.scopeName
+
+  removeGrammarOverrideForPath: (path) ->
+    delete @grammarOverridesByPath[path]
+
+  grammarForFilePath: (path) ->
+    grammar = syntax.grammarForScopeName(@grammarOverridesByPath[path]) if path
+    grammar or syntax.grammarForFilePath(path)
+
   getPath: ->
     @rootDirectory?.path
 

src/app/syntax.coffee

@@ -8,7 +8,6 @@ module.exports =
 class Syntax
   constructor: ->
     @grammars = []
-    @grammarsByPath = {}
     @grammarsByFileType = {}
     @grammarsByScopeName = {}
     @globalProperties = {}
@@ -21,12 +20,6 @@ class Syntax
       @grammarsByFileType[fileType] = grammar
       @grammarsByScopeName[grammar.scopeName] = grammar
 
-  addGrammarForPath: (path, grammar) ->
-    @grammarsByPath[path] = grammar
-
-  removeGrammarForPath: (path) ->
-    delete @grammarsByPath[path]
-
   grammarForFilePath: (filePath) ->
     return @grammarsByFileType["txt"] unless filePath
 
@@ -34,8 +27,7 @@ class Syntax
     if filePath and extension.length == 0
       extension = fs.base(filePath)
 
-    @grammarsByPath[filePath] or
-      @grammarsByFileType[extension] or
+    @grammarsByFileType[extension] or
       @grammarByShebang(filePath) or
       @grammarByFileTypeSuffix(filePath) or
       @grammarsByFileType["txt"]