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Unified Diff: ios/web/webui/crw_web_ui_page_builder.h

Issue 1110213002: Upstream most of the iOS WebUI support in ios/web/ (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Created 5 years, 8 months ago
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Index: ios/web/webui/crw_web_ui_page_builder.h
diff --git a/ios/web/webui/crw_web_ui_page_builder.h b/ios/web/webui/crw_web_ui_page_builder.h
new file mode 100644
index 0000000000000000000000000000000000000000..fb63c259001b75616e3e5518e7457d5b9ff0dc79
--- /dev/null
+++ b/ios/web/webui/crw_web_ui_page_builder.h
@@ -0,0 +1,59 @@
+// 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_

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