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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #include "chrome/browser/prerender/prerender_link_manager.h" |
| 6 |
| 7 #include <limits> |
| 8 #include <queue> |
| 9 #include <utility> |
| 10 |
| 11 #include "chrome/browser/prerender/prerender_contents.h" |
| 12 #include "chrome/browser/prerender/prerender_manager.h" |
| 13 #include "chrome/browser/prerender/prerender_manager_factory.h" |
| 14 #include "chrome/browser/profiles/profile.h" |
| 15 #include "content/public/browser/render_view_host.h" |
| 16 #include "content/public/browser/session_storage_namespace.h" |
| 17 #include "content/public/common/referrer.h" |
| 18 #include "googleurl/src/gurl.h" |
| 19 #include "googleurl/src/url_canon.h" |
| 20 #include "ui/gfx/size.h" |
| 21 |
| 22 using content::RenderViewHost; |
| 23 using content::SessionStorageNamespace; |
| 24 |
| 25 namespace prerender { |
| 26 |
| 27 PrerenderLinkManager::PrerenderLinkManager(PrerenderManager* manager) |
| 28 : manager_(manager) { |
| 29 } |
| 30 |
| 31 PrerenderLinkManager::~PrerenderLinkManager() { |
| 32 } |
| 33 |
| 34 bool PrerenderLinkManager::OnAddPrerender(int child_id, |
| 35 int prerender_id, |
| 36 const GURL& orig_url, |
| 37 const content::Referrer& referrer, |
| 38 const gfx::Size& size, |
| 39 int render_view_route_id) { |
| 40 DVLOG(2) << "OnAddPrerender, child_id = " << child_id |
| 41 << ", prerender_id = " << prerender_id |
| 42 << ", url = " << orig_url.spec(); |
| 43 DVLOG(3) << "... referrer url = " << referrer.url.spec() |
| 44 << ", size = (" << size.width() << ", " << size.height() << ")" |
| 45 << ", render_view_route_id = " << render_view_route_id; |
| 46 |
| 47 // TODO(gavinp): Add tests to ensure fragments work, then remove this fragment |
| 48 // clearing code. |
| 49 url_canon::Replacements<char> replacements; |
| 50 replacements.ClearRef(); |
| 51 const GURL url = orig_url.ReplaceComponents(replacements); |
| 52 |
| 53 if (!manager_->AddPrerenderFromLinkRelPrerender( |
| 54 child_id, render_view_route_id, url, referrer, size)) { |
| 55 return false; |
| 56 } |
| 57 const ChildAndPrerenderIdPair child_and_prerender_id(child_id, prerender_id); |
| 58 DCHECK_EQ(0U, ids_to_url_map_.count(child_and_prerender_id)); |
| 59 ids_to_url_map_.insert(std::make_pair(child_and_prerender_id, url)); |
| 60 return true; |
| 61 } |
| 62 |
| 63 // TODO(gavinp): Once an observer interface is provided down to the WebKit |
| 64 // layer, we should add DCHECK_NE(0L, ids_to_url_map_.count(...)) to both |
| 65 // OnCancelPrerender and OnAbandonPrerender. We can't do this now, since |
| 66 // the WebKit layer isn't even aware if we didn't add the prerender to the map |
| 67 // in OnAddPrerender above. |
| 68 void PrerenderLinkManager::OnCancelPrerender(int child_id, int prerender_id) { |
| 69 DVLOG(2) << "OnCancelPrerender, child_id = " << child_id |
| 70 << ", prerender_id = " << prerender_id; |
| 71 const ChildAndPrerenderIdPair child_and_prerender_id(child_id, prerender_id); |
| 72 IdPairToUrlMap::iterator id_url_iter = |
| 73 ids_to_url_map_.find(child_and_prerender_id); |
| 74 if (id_url_iter == ids_to_url_map_.end()) { |
| 75 DVLOG(5) << "... canceling a prerender that doesn't exist."; |
| 76 return; |
| 77 } |
| 78 const GURL url = id_url_iter->second; |
| 79 ids_to_url_map_.erase(id_url_iter); |
| 80 manager_->MaybeCancelPrerender(url); |
| 81 } |
| 82 |
| 83 void PrerenderLinkManager::OnAbandonPrerender(int child_id, int prerender_id) { |
| 84 DVLOG(2) << "OnAbandonPrerender, child_id = " << child_id |
| 85 << ", prerender_id = " << prerender_id; |
| 86 // TODO(gavinp,cbentzel): Implement reasonable behaviour for |
| 87 // navigation away from launcher. |
| 88 const ChildAndPrerenderIdPair child_and_prerender_id(child_id, prerender_id); |
| 89 ids_to_url_map_.erase(child_and_prerender_id); |
| 90 } |
| 91 |
| 92 void PrerenderLinkManager::OnChannelClosing(int child_id) { |
| 93 DVLOG(2) << "OnChannelClosing, child id = " << child_id; |
| 94 const ChildAndPrerenderIdPair child_and_minimum_prerender_id( |
| 95 child_id, std::numeric_limits<int>::min()); |
| 96 const ChildAndPrerenderIdPair child_and_maximum_prerender_id( |
| 97 child_id, std::numeric_limits<int>::max()); |
| 98 std::queue<int> prerender_ids_to_abandon; |
| 99 for (IdPairToUrlMap::iterator |
| 100 i = ids_to_url_map_.lower_bound(child_and_minimum_prerender_id), |
| 101 e = ids_to_url_map_.upper_bound(child_and_maximum_prerender_id); |
| 102 i != e; ++i) { |
| 103 prerender_ids_to_abandon.push(i->first.second); |
| 104 } |
| 105 while (!prerender_ids_to_abandon.empty()) { |
| 106 DVLOG(4) << "---> abandon prerender_id = " |
| 107 << prerender_ids_to_abandon.front(); |
| 108 OnAbandonPrerender(child_id, prerender_ids_to_abandon.front()); |
| 109 prerender_ids_to_abandon.pop(); |
| 110 } |
| 111 } |
| 112 |
| 113 bool PrerenderLinkManager::IsEmpty() const { |
| 114 return ids_to_url_map_.empty(); |
| 115 } |
| 116 |
| 117 } // namespace prerender |
| 118 |
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