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955097ea77
With the introduction of prerendering in Chromium it is now possible for RenderFrameHosts (RFH) to move between FrameTrees. As a consequence we can no longer rely on FrameTreeNode IDs to uniquely identify a RFH over its lifespan. We must now switch to using GlobalRenderFrameHostId (child_id, frame_routing_id) instead for that purpose. Additionally, we simplify existing code by using the GlobalRenderFrameHostId struct in all places that previously used a (render_process_id, render_frame_id) pair, since these concepts are equivalent. See https://crbug.com/1179502#c8 for additional background.
51 lines
2.1 KiB
C++
51 lines
2.1 KiB
C++
// Copyright (c) 2019 The Chromium Embedded Framework Authors. All rights
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// reserved. Use of this source code is governed by a BSD-style license that
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// can be found in the LICENSE file.
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#ifndef CEF_LIBCEF_BROWSER_REQUEST_CONTEXT_HANDLER_MAP_
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#define CEF_LIBCEF_BROWSER_REQUEST_CONTEXT_HANDLER_MAP_
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#pragma once
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#include <map>
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#include "include/cef_request_context.h"
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#include "include/cef_request_context_handler.h"
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#include "base/macros.h"
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#include "content/public/browser/global_routing_id.h"
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// Tracks CefRequestContextHandler associations on a single thread.
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class CefRequestContextHandlerMap {
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public:
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CefRequestContextHandlerMap();
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~CefRequestContextHandlerMap();
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// Keep track of handlers associated with specific frames. This information
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// originates from frame create/delete notifications in
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// CefBrowserContentsDelegate or CefMimeHandlerViewGuestDelegate which are
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// forwarded via CefRequestContextImpl and CefBrowserContext.
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void AddHandler(const content::GlobalRenderFrameHostId& global_id,
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CefRefPtr<CefRequestContextHandler> handler);
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void RemoveHandler(const content::GlobalRenderFrameHostId& global_id);
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// Returns the handler that matches the specified IDs. If
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// |require_frame_match| is true only exact matches will be returned. If
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// |require_frame_match| is false, and there is not an exact match, then the
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// first handler for the same |global_id.child_id| will be returned.
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CefRefPtr<CefRequestContextHandler> GetHandler(
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const content::GlobalRenderFrameHostId& global_id,
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bool require_frame_match) const;
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private:
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// Map of global ID to handler. These IDs are guaranteed to uniquely
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// identify a RFH for its complete lifespan. See documentation on
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// RenderFrameHost::GetFrameTreeNodeId() for background.
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using RenderIdHandlerMap = std::map<content::GlobalRenderFrameHostId,
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CefRefPtr<CefRequestContextHandler>>;
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RenderIdHandlerMap render_id_handler_map_;
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DISALLOW_COPY_AND_ASSIGN(CefRequestContextHandlerMap);
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};
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#endif // CEF_LIBCEF_BROWSER_REQUEST_CONTEXT_HANDLER_MAP_
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