- Ability to remove file extension/name mappings from existing Language

(#6873) - with unit tests.
- Remove inaccurate docs on Language add extension/name APIs
- Fix PHP mixed-mode handling so token-level detection (getLanguageForMode())
works - similar to our handling of "htmlmixed" mode. Allows us to remove
"clike" dummy language without breaking PHP Toggle Comment functionality

Author: peterflynn

src/language/LanguageManager.js

@@ -468,7 +468,6 @@ define(function (require, exports, module) {
     /**
      * Adds a file extension to this language.
      * @param {!string} extension A file extension used by this language
-     * @return {boolean} Whether adding the file extension was successful or not
      */
     Language.prototype.addFileExtension = function (extension) {
         // Remove a leading dot if present
@@ -493,10 +492,32 @@ define(function (require, exports, module) {
         }
     };
 
+    /**
+     * Unregisters a file extension from this language.
+     * @param {!string} extension File extension to stop using for this language
+     */
+    Language.prototype.removeFileExtension = function (extension) {
+        // Remove a leading dot if present
+        if (extension.charAt(0) === ".") {
+            extension = extension.substr(1);
+        }
+        
+        // Make checks below case-INsensitive
+        extension = extension.toLowerCase();
+        
+        var index = this._fileExtensions.indexOf(extension);
+        if (index !== -1) {
+            this._fileExtensions.splice(index, 1);
+            
+            delete _fileExtensionToLanguageMap[extension];
+            
+            this._wasModified();
+        }
+    };
+
     /**
      * Adds a file name to the language which is used to match files that don't have extensions like "Makefile" for example.
      * @param {!string} extension An extensionless file name used by this language
-     * @return {boolean} Whether adding the file name was successful or not
      */
     Language.prototype.addFileName = function (name) {
         // Make checks below case-INsensitive
@@ -514,7 +535,24 @@ define(function (require, exports, module) {
 
             this._wasModified();
         }
-        return true;
+    };
+
+    /**
+     * Unregisters a file name from this language.
+     * @param {!string} extension An extensionless file name used by this language
+     */
+    Language.prototype.removeFileName = function (name) {
+        // Make checks below case-INsensitive
+        name = name.toLowerCase();
+        
+        var index = this._fileNames.indexOf(name);
+        if (index !== -1) {
+            this._fileNames.splice(index, 1);
+            
+            delete _fileNameToLanguageMap[name];
+            
+            this._wasModified();
+        }
     };
 
     /**
@@ -796,6 +834,10 @@ define(function (require, exports, module) {
         // But for now, we need to associate this madeup "html" mode with our HTML language object.
         _setLanguageForMode("html", html);
 
+        // Similarly, the php mode uses clike internally for the PHP parts
+        var php = getLanguage("php");
+        php._setLanguageForMode("clike", php);
+        
         // The fallback language for unknown modes and file extensions
         _fallbackLanguage = getLanguage("unknown");
     });

src/language/languages.json

@@ -93,7 +93,9 @@
     "php": {
         "name": "PHP",
         "mode": "php",
-        "fileExtensions": ["php", "php3", "php4", "php5", "phtm", "phtml", "ctp"]
+        "fileExtensions": ["php", "php3", "php4", "php5", "phtm", "phtml", "ctp"],
+        "blockComment": ["/*", "*/"],
+        "lineComment": ["//", "#"]
     },
 
     "c": {

test/spec/LanguageManager-test.js

@@ -181,6 +181,34 @@ define(function (require, exports, module) {
                 expect(LanguageManager.getLanguageForPath("cakefile.doesNotExist")).toBe(unknown);
                 expect(LanguageManager.getLanguageForPath("Something.cakefile")).toBe(unknown);
             });
+            
+            it("should remove file extensions and add to new languages", function () {
+                var html    = LanguageManager.getLanguage("html"),
+                    ruby    = LanguageManager.getLanguage("ruby"),
+                    unknown = LanguageManager.getLanguage("unknown");
+                
+                expect(LanguageManager.getLanguageForPath("test.html")).toBe(html);
+                
+                html.removeFileExtension("html");
+                expect(LanguageManager.getLanguageForPath("test.html")).toBe(unknown);
+                
+                ruby.addFileExtension("html");
+                expect(LanguageManager.getLanguageForPath("test.html")).toBe(ruby);
+            });
+            
+            it("should remove file names and add to new languages", function () {
+                var coffee  = LanguageManager.getLanguage("coffeescript"),
+                    html    = LanguageManager.getLanguage("html"),
+                    unknown = LanguageManager.getLanguage("unknown");
+                
+                expect(LanguageManager.getLanguageForPath("Cakefile")).toBe(coffee);
+                
+                coffee.removeFileName("Cakefile");
+                expect(LanguageManager.getLanguageForPath("Cakefile")).toBe(unknown);
+                
+                html.addFileName("Cakefile");
+                expect(LanguageManager.getLanguageForPath("Cakefile")).toBe(html);
+            });
         });
 
         describe("defineLanguage", function () {