content/renderer/history_entry.cc

   1 // Copyright 2014 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 /*
   6  * Copyright (C) 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
   7  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
   8  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved.
   9  *     (http://www.torchmobile.com/)
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  *
  15  * 1.  Redistributions of source code must retain the above copyright
  16  *     notice, this list of conditions and the following disclaimer.
  17  * 2.  Redistributions in binary form must reproduce the above copyright
  18  *     notice, this list of conditions and the following disclaimer in the
  19  *     documentation and/or other materials provided with the distribution.
  20  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
  21  *     its contributors may be used to endorse or promote products derived
  22  *     from this software without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
  25  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  26  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  27  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
  28  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  29  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  30  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  31  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  32  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  33  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  34  */
  35
  36 #include "content/renderer/history_entry.h"
  37
  38 #include "content/renderer/render_frame_impl.h"
  39 #include "content/renderer/render_view_impl.h"
  40 #include "third_party/WebKit/public/web/WebFrame.h"
  41
  42 using blink::WebFrame;
  43 using blink::WebHistoryItem;
  44
  45 namespace content {
  46
  47 HistoryEntry::HistoryNode* HistoryEntry::HistoryNode::AddChild(
  48     const WebHistoryItem& item,
  49     int64_t frame_id) {
  50   children_->push_back(new HistoryNode(entry_, item, frame_id));
  51   return children_->back();
  52 }
  53
  54 HistoryEntry::HistoryNode* HistoryEntry::HistoryNode::AddChild() {
  55   return AddChild(WebHistoryItem(), kInvalidFrameRoutingID);
  56 }
  57
  58 HistoryEntry::HistoryNode* HistoryEntry::HistoryNode::CloneAndReplace(
  59     HistoryEntry* new_entry,
  60     const WebHistoryItem& new_item,
  61     bool clone_children_of_target,
  62     RenderFrameImpl* target_frame,
  63     RenderFrameImpl* current_frame) {
  64   bool is_target_frame = target_frame == current_frame;
  65   const WebHistoryItem& item_for_create = is_target_frame ? new_item : item_;
  66   HistoryNode* new_history_node = new HistoryNode(
  67       new_entry, item_for_create, current_frame->GetRoutingID());
  68
  69   if (is_target_frame && clone_children_of_target && !item_.isNull()) {
  70     new_history_node->item().setDocumentSequenceNumber(
  71         item_.documentSequenceNumber());
  72   }
  73
  74   if (clone_children_of_target || !is_target_frame) {
  75     for (WebFrame* child = current_frame->GetWebFrame()->firstChild(); child;
  76          child = child->nextSibling()) {
  77       RenderFrameImpl* child_render_frame =
  78           RenderFrameImpl::FromWebFrame(child);
  79       HistoryNode* child_history_node =
  80           entry_->GetHistoryNodeForFrame(child_render_frame);
  81       if (!child_history_node)
  82         continue;
  83       HistoryNode* new_child_node =
  84           child_history_node->CloneAndReplace(new_entry,
  85                                               new_item,
  86                                               clone_children_of_target,
  87                                               target_frame,
  88                                               child_render_frame);
  89       new_history_node->children_->push_back(new_child_node);
  90     }
  91   }
  92   return new_history_node;
  93 }
  94
  95 void HistoryEntry::HistoryNode::set_item(const WebHistoryItem& item) {
  96   // The previous HistoryItem might not have had a target set, or it might be
  97   // different than the current one.
  98   entry_->unique_names_to_items_[item.target().utf8()] = this;
  99   item_ = item;
 100 }
 101
 102 HistoryEntry::HistoryNode::HistoryNode(HistoryEntry* entry,
 103                                        const WebHistoryItem& item,
 104                                        int64_t frame_id)
 105     : entry_(entry), item_(item) {
 106   if (frame_id != kInvalidFrameRoutingID)
 107     entry_->frames_to_items_[frame_id] = this;
 108   if (!item.isNull())
 109     entry_->unique_names_to_items_[item.target().utf8()] = this;
 110   children_.reset(new ScopedVector<HistoryNode>);
 111 }
 112
 113 HistoryEntry::HistoryNode::~HistoryNode() {
 114 }
 115
 116 void HistoryEntry::HistoryNode::RemoveChildren() {
 117   // TODO(japhet): This is inefficient. Figure out a cleaner way to ensure
 118   // this HistoryNode isn't cached anywhere.
 119   std::vector<uint64_t> frames_to_remove;
 120   std::vector<std::string> unique_names_to_remove;
 121   for (size_t i = 0; i < children().size(); i++) {
 122     children().at(i)->RemoveChildren();
 123
 124     HistoryEntry::FramesToItems::iterator frames_end =
 125         entry_->frames_to_items_.end();
 126     HistoryEntry::UniqueNamesToItems::iterator unique_names_end =
 127         entry_->unique_names_to_items_.end();
 128     for (HistoryEntry::FramesToItems::iterator it =
 129              entry_->frames_to_items_.begin();
 130          it != frames_end;
 131          ++it) {
 132       if (it->second == children().at(i))
 133         frames_to_remove.push_back(it->first);
 134     }
 135     for (HistoryEntry::UniqueNamesToItems::iterator it =
 136              entry_->unique_names_to_items_.begin();
 137          it != unique_names_end;
 138          ++it) {
 139       if (it->second == children().at(i))
 140         unique_names_to_remove.push_back(it->first);
 141     }
 142   }
 143   for (unsigned i = 0; i < frames_to_remove.size(); i++)
 144     entry_->frames_to_items_.erase(frames_to_remove[i]);
 145   for (unsigned i = 0; i < unique_names_to_remove.size(); i++)
 146     entry_->unique_names_to_items_.erase(unique_names_to_remove[i]);
 147   children_.reset(new ScopedVector<HistoryNode>);
 148 }
 149
 150 HistoryEntry::HistoryEntry() {
 151   root_.reset(new HistoryNode(this, WebHistoryItem(), kInvalidFrameRoutingID));
 152 }
 153
 154 HistoryEntry::~HistoryEntry() {
 155 }
 156
 157 HistoryEntry::HistoryEntry(const WebHistoryItem& root, int64_t frame_id) {
 158   root_.reset(new HistoryNode(this, root, frame_id));
 159 }
 160
 161 HistoryEntry* HistoryEntry::CloneAndReplace(const WebHistoryItem& new_item,
 162                                             bool clone_children_of_target,
 163                                             RenderFrameImpl* target_frame,
 164                                             RenderViewImpl* render_view) {
 165   HistoryEntry* new_entry = new HistoryEntry();
 166   new_entry->root_.reset(
 167       root_->CloneAndReplace(new_entry,
 168                              new_item,
 169                              clone_children_of_target,
 170                              target_frame,
 171                              render_view->main_render_frame()));
 172   return new_entry;
 173 }
 174
 175 HistoryEntry::HistoryNode* HistoryEntry::GetHistoryNodeForFrame(
 176     RenderFrameImpl* frame) {
 177   if (HistoryNode* history_node = frames_to_items_[frame->GetRoutingID()])
 178     return history_node;
 179   return unique_names_to_items_[frame->GetWebFrame()->uniqueName().utf8()];
 180 }
 181
 182 WebHistoryItem HistoryEntry::GetItemForFrame(RenderFrameImpl* frame) {
 183   if (HistoryNode* history_node = GetHistoryNodeForFrame(frame))
 184     return history_node->item();
 185   return WebHistoryItem();
 186 }
 187
 188 }  // namespace content