chrome/browser/prerender/prerender_handle.cc

   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_handle.h"
   6
   7 #include <algorithm>
   8
   9 #include "base/logging.h"
  10 #include "chrome/browser/prerender/prerender_contents.h"
  11 #include "content/public/browser/web_contents.h"
  12
  13 namespace prerender {
  14
  15 PrerenderHandle::Observer::Observer() {
  16 }
  17
  18 PrerenderHandle::Observer::~Observer() {
  19 }
  20
  21 PrerenderHandle::~PrerenderHandle() {
  22   if (prerender_data_.get()) {
  23     prerender_data_->contents()->RemoveObserver(this);
  24   }
  25 }
  26
  27 void PrerenderHandle::SetObserver(Observer* observer) {
  28   DCHECK_NE(static_cast<Observer*>(NULL), observer);
  29   observer_ = observer;
  30 }
  31
  32 void PrerenderHandle::OnNavigateAway() {
  33   DCHECK(CalledOnValidThread());
  34   if (prerender_data_.get())
  35     prerender_data_->OnHandleNavigatedAway(this);
  36 }
  37
  38 void PrerenderHandle::OnCancel() {
  39   DCHECK(CalledOnValidThread());
  40   if (prerender_data_.get())
  41     prerender_data_->OnHandleCanceled(this);
  42 }
  43
  44 bool PrerenderHandle::IsPrerendering() const {
  45   DCHECK(CalledOnValidThread());
  46   return prerender_data_.get() != NULL;
  47 }
  48
  49 bool PrerenderHandle::IsFinishedLoading() const {
  50   DCHECK(CalledOnValidThread());
  51   if (!prerender_data_.get())
  52     return false;
  53   return prerender_data_->contents()->has_finished_loading();
  54 }
  55
  56 bool PrerenderHandle::IsAbandoned() const {
  57   DCHECK(CalledOnValidThread());
  58   return prerender_data_ && !prerender_data_->abandon_time().is_null();
  59 }
  60
  61 PrerenderContents* PrerenderHandle::contents() const {
  62   DCHECK(CalledOnValidThread());
  63   return prerender_data_ ? prerender_data_->contents() : NULL;
  64 }
  65
  66 bool PrerenderHandle::Matches(
  67     const GURL& url,
  68     const content::SessionStorageNamespace* session_storage_namespace) const {
  69   DCHECK(CalledOnValidThread());
  70   if (!prerender_data_.get())
  71     return false;
  72   return prerender_data_->contents()->Matches(url, session_storage_namespace);
  73 }
  74
  75 PrerenderHandle::PrerenderHandle(
  76     PrerenderManager::PrerenderData* prerender_data)
  77     : observer_(NULL),
  78       weak_ptr_factory_(this) {
  79   if (prerender_data) {
  80     prerender_data_ = prerender_data->AsWeakPtr();
  81     prerender_data->OnHandleCreated(this);
  82   }
  83 }
  84
  85 void PrerenderHandle::OnPrerenderStart(PrerenderContents* prerender_contents) {
  86   DCHECK(CalledOnValidThread());
  87   DCHECK(prerender_data_.get());
  88   DCHECK_EQ(prerender_data_->contents(), prerender_contents);
  89   if (observer_)
  90     observer_->OnPrerenderStart(this);
  91 }
  92
  93 void PrerenderHandle::OnPrerenderStopLoading(
  94     PrerenderContents* prerender_contents) {
  95   DCHECK(CalledOnValidThread());
  96   DCHECK(prerender_data_.get());
  97   DCHECK_EQ(prerender_data_->contents(), prerender_contents);
  98   if (observer_)
  99     observer_->OnPrerenderStopLoading(this);
 100 }
 101
 102 void PrerenderHandle::OnPrerenderDomContentLoaded(
 103     PrerenderContents* prerender_contents) {
 104   DCHECK(CalledOnValidThread());
 105   DCHECK(prerender_data_.get());
 106   DCHECK_EQ(prerender_data_->contents(), prerender_contents);
 107   if (observer_)
 108     observer_->OnPrerenderDomContentLoaded(this);
 109 }
 110
 111 void PrerenderHandle::OnPrerenderStop(PrerenderContents* prerender_contents) {
 112   DCHECK(CalledOnValidThread());
 113   if (observer_)
 114     observer_->OnPrerenderStop(this);
 115 }
 116
 117 void PrerenderHandle::OnPrerenderCreatedMatchCompleteReplacement(
 118     PrerenderContents* contents, PrerenderContents* replacement) {
 119   DCHECK(CalledOnValidThread());
 120
 121   // This should occur in the middle of the surgery on the PrerenderData, and
 122   // so we expect to not have our new contents in our PrerenderData yet. The
 123   // switch occurs in
 124   // PrerenderManager::PrerenderData::MakeIntoMatchCompleteReplacement, so
 125   // this method only needs to switch observing.
 126
 127   contents->RemoveObserver(this);
 128   replacement->AddObserver(this);
 129   if (observer_)
 130     observer_->OnPrerenderCreatedMatchCompleteReplacement(this);
 131 }
 132
 133 bool PrerenderHandle::RepresentingSamePrerenderAs(
 134     PrerenderHandle* other) const {
 135   return other && other->prerender_data_.get() && prerender_data_.get()
 136       && prerender_data_.get() == other->prerender_data_.get();
 137 }
 138
 139 }  // namespace prerender