Devtools: [WIP] Implement enhanced devtools extension language APIs

Source/devtools/front_end/common/ResourceType.js

Index: Source/devtools/front_end/common/ResourceType.js
diff --git a/Source/devtools/front_end/common/ResourceType.js b/Source/devtools/front_end/common/ResourceType.js
index 88ec23b8698646a6bf537be5dd7353925e637e67..9a9480f9ce12a788fcde7986ef5ea5c824886920 100644
--- a/Source/devtools/front_end/common/ResourceType.js
+++ b/Source/devtools/front_end/common/ResourceType.js
@@ -136,7 +136,41 @@ WebInspector.resourceTypes = {
     Other: new WebInspector.ResourceType("other", "Other", "Other", "Other", "rgb(186,186,186)", false)
 }
 
-WebInspector.ResourceType.mimeTypesForExtensions = {
+/**
+ * @param {string} url
+ * @return {string}
+ */
+WebInspector.ResourceType.mimeFromURL = function(url)
+{
+    var name = WebInspector.TextUtils.fileName(url);
+    if (WebInspector.ResourceType.mimeTypeByName[name]) {
+        return WebInspector.ResourceType.mimeTypeByName[name];
+    }
+    var ext = WebInspector.TextUtils.extension(url).toLowerCase();
+    return WebInspector.ResourceType.mimeTypeByExtension[ext];
+}
+
+/**
+ * @param {string} extensionOrName
+ * @param {string} mime
+ * @param {boolean=} byName
+ */
+WebInspector.ResourceType.newMimeType = function(extensionOrName, mime, byName)
+{
+    var matches = WebInspector.ResourceType.mimeTypeByExtension;
+    if (byName) {
+        matches = WebInspector.ResourceType.mimeTypeByName;
+    }
+
+    matches[extensionOrName] = mime;
+}
+
+WebInspector.ResourceType.mimeTypeByName = {
+    // CoffeeScript
+    "Cakefile": "text/x-coffeescript"
+}
+
+WebInspector.ResourceType.mimeTypeByExtension = {
     // Web extensions
     "js": "text/javascript",
     "css": "text/css",
@@ -166,6 +200,7 @@ WebInspector.ResourceType.mimeTypesForExtensions = {
 
     // TypeScript
     "ts": "text/typescript",
+    "tsx": "text/typescript",
 
     // JSON
     "json": "application/json",
@@ -197,3 +232,20 @@ WebInspector.ResourceType.mimeTypesForExtensions = {
     // Video Text Tracks.
     "vtt": "text/vtt"
 }
+
+/**
+ * @return {string}
+ * @suppress {missingProperties}
+ */
+WebInspector.ResourceType.fromActivePanel = function()
+{
+    if (self.runtime.moduleIsLoaded("sources")) {
+        try {
+            return WebInspector.ResourceType.mimeFromURL(WebInspector.SourcesPanel.instance().sourcesView().currentUISourceCode().uri());
+        } catch (e) {
+            return "text/javascript";
+        }
+    } else {
+        return "text/javascript";
+    }
+}