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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/ui/tab_contents/tab_contents_iterator.h"
#include "base/logging.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/ui/browser.h"
#include "chrome/browser/printing/background_printing_manager.h"
namespace {
printing::BackgroundPrintingManager* GetBackgroundPrintingManager() {
return g_browser_process->background_printing_manager();
}
} // namespace
TabContentsIterator::TabContentsIterator()
: browser_iterator_(BrowserList::begin()),
web_view_index_(-1),
bg_printing_iterator_(GetBackgroundPrintingManager()->begin()),
cur_(NULL) {
Advance();
}
void TabContentsIterator::Advance() {
// The current TabContents should be valid unless we are at the beginning.
DCHECK(cur_ || (web_view_index_ == -1 &&
browser_iterator_ == BrowserList::begin()))
<< "Trying to advance past the end";
// Update cur_ to the next TabContents in the list.
while (browser_iterator_ != BrowserList::end()) {
if (++web_view_index_ >= (*browser_iterator_)->tab_count()) {
// Advance to the next Browser in the list.
++browser_iterator_;
web_view_index_ = -1;
continue;
}
TabContents* next_tab =
(*browser_iterator_)->GetTabContentsAt(web_view_index_);
if (next_tab) {
cur_ = next_tab;
return;
}
}
// If no more TabContents from Browsers, check the BackgroundPrintingManager.
while (bg_printing_iterator_ != GetBackgroundPrintingManager()->end()) {
cur_ = *bg_printing_iterator_;
CHECK(cur_);
++bg_printing_iterator_;
return;
}
// Reached the end - no more TabContents.
cur_ = NULL;
}
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