StorageDelegate.java 文件源码

/**
 * Update tab entries based on metadata.
 * @param metadataBytes Metadata from last time Chrome was alive.
 * @param entryMap Map to fill with {@link DocumentTabModel.Entry}s about Tabs.
 * @param recentlyClosedTabIdList List to fill with IDs of recently closed tabs.
 */
private void updateTabEntriesFromMetadata(byte[] metadataBytes, SparseArray<Entry> entryMap,
        List<Integer> recentlyClosedTabIdList) {
    if (metadataBytes != null) {
        DocumentList list = null;
        try {
            list = MessageNano.mergeFrom(new DocumentList(), metadataBytes);
        } catch (IOException e) {
            Log.e(TAG, "I/O exception", e);
        }
        if (list == null) return;

        for (int i = 0; i < list.entries.length; i++) {
            DocumentEntry savedEntry = list.entries[i];
            int tabId = savedEntry.tabId;

            // If the tab ID isn't in the list, it must have been closed after Chrome died.
            if (entryMap.indexOfKey(tabId) < 0) {
                recentlyClosedTabIdList.add(tabId);
                continue;
            }

            // Restore information about the Tab.
            entryMap.get(tabId).canGoBack = savedEntry.canGoBack;
        }
    }
}