| // Copyright 2015 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef IOS_WEB_WEBUI_CRW_WEB_UI_PAGE_BUILDER_H_ |
| #define IOS_WEB_WEBUI_CRW_WEB_UI_PAGE_BUILDER_H_ |
| |
| #import <Foundation/Foundation.h> |
| |
| #include "url/gurl.h" |
| |
| namespace web { |
| // Block type for WebUI page build completion callback. |
| typedef void (^WebUIPageCompletion)(NSString*); |
| // Block type for WebUI page builder delegate completion callback. |
| typedef void (^WebUIDelegateCompletion)(NSString*, const GURL&); |
| } // namespace web |
| |
| @class CRWWebUIPageBuilder; |
| |
| // Delegate for CRWWebUIPageBuilder. Handles resource retrieval. |
| @protocol CRWWebUIPageBuilderDelegate<NSObject> |
| // Fetches resource for resourceURL and invokes completionHandler with the |
| // result. |
| - (void)webUIPageBuilder:(CRWWebUIPageBuilder*)webUIPageBuilder |
| fetchResourceWithURL:(const GURL&)resourceURL |
| completionHandler:(web::WebUIDelegateCompletion)completionHandler; |
| @end |
| |
| // Class for requesting and building WebUI HTML pages. Due to limitations on |
| // custom network protocols for WKWebView, it is not possible to directly load |
| // WebUI in WKWebView via the network stack. Instead, WebUI resources are |
| // manually fetched from the network stack and then flattened and loaded into |
| // the web view. |
| // |
| // To flatten the WebUI resources, tags for JS and CSS resources are replaced |
| // with retrieved resources. For example, if a WebUI HTML resource looks like: |
| // <html> |
| // <script src='chrome://javascript.js></script> |
| // <link rel="stylesheet" href="chrome://stylesheet.css"> |
| // </html> |
| // the flattened version would look like: |
| // <html> |
| // <script>[Content of chrome://javascript.js]</script> |
| // <style>[Content of chrome://stylesheet.css]</style> |
| // </html> |
| @interface CRWWebUIPageBuilder : NSObject |
| |
| // Designated initializer. |
| - (instancetype)initWithDelegate:(id<CRWWebUIPageBuilderDelegate>)delegate; |
| |
| // Builds and flattens page for webUIURL, and invokes completionHandler with the |
| // result. |
| - (void)buildWebUIPageForURL:(const GURL&)webUIURL |
| completionHandler:(web::WebUIPageCompletion)completionHandler; |
| |
| @end |
| |
| #endif // IOS_WEB_WEBUI_CRW_WEB_UI_PAGE_BUILDER_H_ |
