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Unified Diff: components/dom_distiller/core/dom_distiller_request_view_base.h

Issue 1101993003: Move common distiller code to superclass (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: address comments Created 5 years, 8 months ago
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Index: components/dom_distiller/core/dom_distiller_request_view_base.h
diff --git a/components/dom_distiller/core/dom_distiller_request_view_base.h b/components/dom_distiller/core/dom_distiller_request_view_base.h
new file mode 100644
index 0000000000000000000000000000000000000000..16b8ca7d93debd0eb6d6a741cea6943cc253495c
--- /dev/null
+++ b/components/dom_distiller/core/dom_distiller_request_view_base.h
@@ -0,0 +1,87 @@
+// 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 COMPONENTS_DOM_DISTILLER_CORE_DOM_DISTILLER_REQUEST_VIEW_BASE_H_
+#define COMPONENTS_DOM_DISTILLER_CORE_DOM_DISTILLER_REQUEST_VIEW_BASE_H_
+
+#include <sstream>
+#include <string>
+#include <vector>
+
+#include "base/memory/ref_counted_memory.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/strings/utf_string_conversions.h"
+#include "components/dom_distiller/core/distilled_page_prefs.h"
+#include "components/dom_distiller/core/dom_distiller_service.h"
+#include "components/dom_distiller/core/task_tracker.h"
+#include "components/dom_distiller/core/viewer.h"
+#include "content/public/browser/url_data_source.h"
+#include "net/base/url_util.h"
+
+namespace dom_distiller {
+
+// This interface is used to abstract the data callback from the distiller. The
+// callbacks for different platforms have different numbers of parameters
+// (namely iOS and Android) which makes this necessary.
+class DistillerDataCallback {
+ public:
+ virtual ~DistillerDataCallback(){};
+ virtual void RunCallback(std::string& data) = 0;
+};
+
+// Handles receiving data asynchronously for a specific entry, and passing
+// it along to the data callback for the data source. Lifetime matches that of
+// the current main frame's page in the Viewer instance.
+class DomDistillerRequestViewBase
+ : public ViewRequestDelegate,
+ public DistilledPagePrefs::Observer {
+ public:
+ explicit DomDistillerRequestViewBase(
+ scoped_ptr<DistillerDataCallback> callback,
+ DistilledPagePrefs* distilled_page_prefs);
+ ~DomDistillerRequestViewBase() override;
+
+ // Flag this request as an error and send the error page template.
+ void FlagAsErrorPage();
+ // Get if this viewer is in an error state.
+ bool IsErrorPage();
+
+ // ViewRequestDelegate implementation:
+ void OnArticleReady(const DistilledArticleProto* article_proto) override;
+
+ void OnArticleUpdated(ArticleDistillationUpdate article_update) override;
+
+ void TakeViewerHandle(scoped_ptr<ViewerHandle> viewer_handle);
+
+ protected:
+ // DistilledPagePrefs::Observer implementation:
+ void OnChangeFontFamily(
+ DistilledPagePrefs::FontFamily new_font_family) override;
+ void OnChangeTheme(DistilledPagePrefs::Theme new_theme) override;
+
+ // Sends JavaScript to the attached Viewer, buffering data if the viewer isn't
+ // ready.
+ virtual void SendJavaScript(const std::string& buffer) = 0;
+
+ // The handle to the view request towards the DomDistillerService. It
+ // needs to be kept around to ensure the distillation request finishes.
+ scoped_ptr<ViewerHandle> viewer_handle_;
+
+ // Holds the callback to where the data retrieved is sent back.
+ scoped_ptr<DistillerDataCallback> callback_;
+
+ // Number of pages of the distilled article content that have been rendered by
+ // the viewer.
+ int page_count_;
+
+ // Interface for accessing preferences for distilled pages.
+ DistilledPagePrefs* distilled_page_prefs_;
+
+ // Flag to tell this observer that the web contents are in an error state.
+ bool is_error_page_;
+};
+
+} // namespace dom_distiller
+
+#endif // COMPONENTS_DOM_DISTILLER_CORE_DOM_DISTILLER_REQUEST_VIEW_BASE_H_
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