Allow language inheritance (i.e. SVG extends XML)

src/LiveDevelopment/LiveDevelopment.js

@@ -245,10 +245,11 @@ define(function LiveDevelopment(require, exports, module) {
      * @param {Document} document
      */
     function _classForDocument(doc) {
-        switch (doc.getLanguage().getId()) {
-        case "css":
+        var language = doc.getLanguage();
+        if (language.isInstanceOfLanguage("css")) {
             return CSSDocument;
-        case "javascript":
+        }
+        if (language.isInstanceOfLanguage("javascript")) {
             return exports.config.experimental ? JSDocument : null;
         }
 

src/editor/CSSInlineEditor.js

@@ -90,7 +90,7 @@ define(function (require, exports, module) {
      */
     function htmlToCSSProvider(hostEditor, pos) {
         // Only provide a CSS editor when cursor is in HTML content
-        if (hostEditor.getLanguageForSelection().getId() !== "html") {
+        if (!hostEditor.getLanguageForSelection().isInstanceOfLanguage("html")) {
             return null;
         }
 

src/editor/CodeHintManager.js

@@ -285,11 +285,11 @@ define(function (require, exports, module) {
      *  Return the array of hint providers for the given language id.
      *  This gets called (potentially) on every keypress. So, it should be fast.
      *
-     * @param {!string} languageId
+     * @param {!Language} language
      * @return {?Array.<{provider: Object, priority: number}>}
      */
-    function _getProvidersForLanguageId(languageId) {
-        return hintProviders[languageId] || hintProviders.all;
+    function _getProvidersForLanguage(language) {
+        return language.findEntryInObject(hintProviders) || hintProviders.all;
     }
 
     /**
@@ -375,7 +375,7 @@ define(function (require, exports, module) {
     function _beginSession(editor) {
         // Find a suitable provider, if any
         var language = editor.getLanguageForSelection(),
-            enabledProviders = _getProvidersForLanguageId(language.getId());
+            enabledProviders = _getProvidersForLanguage(language);
 
         enabledProviders.some(function (item, index) {
             if (item.provider.hasHints(editor, lastChar)) {

src/extensions/default/JSLint/main.js

@@ -107,7 +107,7 @@ define(function (require, exports, module) {
 
         var language = currentDoc ? LanguageManager.getLanguageForPath(currentDoc.file.fullPath) : "";
 
-        if (_enabled && language && language.getId() === "javascript") {
+        if (_enabled && language && language.isInstanceOfLanguage("javascript")) {
             perfTimerLint = PerfUtils.markStart("JSLint linting:\t" + (!currentDoc || currentDoc.file.fullPath));
             var text = currentDoc.getText();
 

src/extensions/default/JavaScriptCodeHints/HintUtils.js

@@ -170,8 +170,8 @@ define(function (require, exports, module) {
         });
     }
 
-    function isSupportedLanguage(languageId) {
-        return SUPPORTED_LANGUAGES.indexOf(languageId) !== -1;
+    function isSupportedLanguage(language) {
+        return language.isInstanceOfLanguageInArray(SUPPORTED_LANGUAGES);
     }
     var KEYWORD_NAMES   = [
         "break", "case", "catch", "continue", "debugger", "default", "delete",

src/extensions/default/JavaScriptCodeHints/ScopeManager.js

@@ -200,8 +200,8 @@ define(function (require, exports, module) {
                     if (fileCallback && entry.isFile) {
 
                         if (file.indexOf(".") > 0) { // ignore .dotfiles
-                            var languageID = LanguageManager.getLanguageForPath(path).getId();
-                            if (languageID === HintUtils.LANGUAGE_ID) {
+                            var language = LanguageManager.getLanguageForPath(path);
+                            if (language.isInstanceOfLanguage(HintUtils.LANGUAGE_ID)) {
                                 fileCallback(path);
                             }
                         }

src/extensions/default/JavaScriptCodeHints/Session.js

@@ -504,7 +504,7 @@ define(function (require, exports, module) {
      * @return {string} - the "javascript" text that can be sent to Tern.
      */
     Session.prototype.getJavascriptText = function () {
-        if (LanguageManager.getLanguageForPath(this.editor.document.file.fullPath).getId() === "html") {
+        if (this.editor.document.getLanguage().isInstanceOfLanguage("html")) {
             // HTML file - need to send back only the bodies of the
             // <script> tags
             var text = "",

src/extensions/default/JavaScriptCodeHints/main.js

@@ -239,13 +239,12 @@ define(function (require, exports, module) {
     /**
      * @return {boolean} - true if the document is a html file
      */
-    function isHTMLFile(document) {
-        var languageID = LanguageManager.getLanguageForPath(document.file.fullPath).getId();
-        return languageID === "html";
+    function isHTMLFile(doc) {
+        return doc.getLanguage().isInstanceOfLanguage("html");
     }
 
     function isInlineScript(editor) {
-        return editor.getModeForSelection() === "javascript";
+        return editor.getLanguageForSelection().isInstanceOfLanguage("javascript");
     }
 
     /**
@@ -470,7 +469,7 @@ define(function (require, exports, module) {
             cachedHints = null;
             cachedType = null;
 
-            if (editor && HintUtils.isSupportedLanguage(LanguageManager.getLanguageForPath(editor.document.file.fullPath).getId())) {
+            if (editor && HintUtils.isSupportedLanguage(LanguageManager.getLanguageForPath(editor.document.file.fullPath))) {
                 initializeSession(editor, true);
             } else {
                 session = null;

src/extensions/default/WebPlatformDocs/main.js

@@ -85,7 +85,7 @@ define(function (require, exports, module) {
      */
     function inlineProvider(hostEditor, pos) {
         // Only provide docs when cursor is in CSS content
-        if (hostEditor.getLanguageForSelection().getId() !== "css") {
+        if (!hostEditor.getLanguageForSelection().isInstanceOfLanguage("css")) {
             return null;
         }