tab_contents_iterator.cc revision 2a99a7e74a7f215066514fe81d2bfa6639d9eddd
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/ui/tab_contents/tab_contents_iterator.h"
6
7#include "base/logging.h"
8#include "chrome/browser/browser_process.h"
9#include "chrome/browser/ui/browser.h"
10#include "chrome/browser/ui/tabs/tab_strip_model.h"
11
12TabContentsIterator::TabContentsIterator()
13    : web_view_index_(-1),
14      cur_(NULL) {
15  // Load the first WebContents into |cur_|.
16  Next();
17}
18
19void TabContentsIterator::Next() {
20  // The current WebContents should be valid unless we are at the beginning.
21  DCHECK(cur_ || web_view_index_ == -1) << "Trying to advance past the end";
22
23  // Update |cur_| to the next WebContents in the list.
24  while (!browser_iterator_.done()) {
25    if (++web_view_index_ >= browser_iterator_->tab_strip_model()->count()) {
26      // Advance to the next Browser in the list.
27      browser_iterator_.Next();
28      web_view_index_ = -1;
29      continue;
30    }
31
32    content::WebContents* next_tab = browser_iterator_->tab_strip_model()
33        ->GetWebContentsAt(web_view_index_);
34    if (next_tab) {
35      cur_ = next_tab;
36      return;
37    }
38  }
39  // Reached the end.
40  cur_ = NULL;
41}
42