chrome/browser/ui/tab_contents/tab_contents_iterator.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/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
  12 TabContentsIterator::TabContentsIterator()
  13     : web_view_index_(-1),
  14       cur_(NULL) {
  15   // Load the first WebContents into |cur_|.
  16   Next();
  17 }
  18
  19 void 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 }