Improvement + fix bug:

- improve Tag API
- Improve CodePad UI + Extension API
- Add package dependencies to Market Place

src/core/BaseApplication.ts

@@ -301,7 +301,7 @@ namespace OS {
              * @memberof BaseApplication
              */
             show(): void {
-                return this.trigger("focus", undefined);
+                this.trigger("focus", undefined);
             }
 
             /**

src/core/BaseDialog.ts

@@ -63,7 +63,6 @@ namespace OS {
              */
             quit(): void {
                 const evt = new BaseEvent("exit", false);
-                this.onexit(evt);
                 if (!evt.prevent) {
                     delete this._observable;
                     if (this.scheme) {
@@ -72,6 +71,7 @@ namespace OS {
                     if (this.dialog) {
                         return this.dialog.quit();
                     }
+                    this.onexit(evt);
                 }
             }
 
@@ -117,6 +117,9 @@ namespace OS {
             show(): void {
                 this.trigger("focus");
                 $(this.scheme).css("z-index", GUI.zindex + 2);
+                if (this.dialog) {
+                    this.dialog.show();
+                }
             }
 
             /**
@@ -406,7 +409,10 @@ namespace OS {
                     if (this.data && this.data.value) {
                         $input.val(this.data.value);
                     }
-
+                    if(this.data && this.data.disable)
+                    {
+                        $input.prop('disabled', true);
+                    }
                     (this.find("btnOk") as tag.ButtonTag).onbtclick = (e) => {
                         const value = $input.val();
                         if (!value || value === "") {

src/core/BaseModel.ts

@@ -565,7 +565,6 @@ namespace OS {
                 this.dialog.handle = resolve;
                 this.dialog.pid = this.pid;
                 this.dialog.data = data;
-
                 return this.dialog.init();
             });
         }

src/core/core.ts

@@ -1059,6 +1059,25 @@ namespace OS {
              * @memberof PackageMetaType
              */
             version: string;
+            
+            /**
+             * Package dependencies, each entry is in the following format
+             * 
+             * `package_name@version`
+             * 
+             * Example:
+             * 
+             * ```json
+             * [
+             *  "File@0.1.5-b"
+             * ]
+             * ```
+             *
+             * @type {string[]}
+             * @memberof PackageMetaType
+             */
+            dependencies: string[];
+
             [propName: string]: any;
         }
         /**
@@ -1359,11 +1378,12 @@ namespace OS {
          *
          * @export
          * @param {string} l VFS path to the library
+         * @param {string} force force reload library
          * @returns {Promise<any>} a promise on the result data
          */
-        export function requires(l: string): Promise<any> {
+        export function requires(l: string, force: boolean = false): Promise<any> {
             return new Promise(function(resolve, reject) {
-                if (!API.shared[l]) {
+                if (!API.shared[l] || force) {
                     const libfp = l.asFileHandle();
                     switch (libfp.ext) {
                         case "css":
@@ -1427,7 +1447,7 @@ namespace OS {
                     }
                     return resolve(r);
                 });
-                return API.requires(libs[0]).catch((e: Error) =>
+                return API.requires(libs[0], false).catch((e: Error) =>
                     reject(__e(e))
                 );
             });