icondatabase.cpp

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String IconDatabase::iconURLForPageURL(const String& pageURLOriginal)
{    
    ASSERT_NOT_SYNC_THREAD(); 
        
    // Cannot do anything with pageURLOriginal that would end up storing it without deep copying first
    // Also, in the case we have a real answer for the caller, we must deep copy that as well
    
    if (!isOpen() || pageURLOriginal.isEmpty())
        return String();
        
    MutexLocker locker(m_urlAndIconLock);
    
    PageURLRecord* pageRecord = m_pageURLToRecordMap.get(pageURLOriginal);
    if (!pageRecord)
        pageRecord = getOrCreatePageURLRecord(pageURLOriginal.copy());
    
    // If pageRecord is NULL, one of two things is true -
    // 1 - The initial url import is incomplete and this pageURL has already been marked to be notified once it is complete if an iconURL exists
    // 2 - The initial url import IS complete and this pageURL has no icon
    if (!pageRecord)
        return String();
    
    // Possible the pageRecord is around because it's a retained pageURL with no iconURL, so we have to check
    return pageRecord->iconRecord() ? pageRecord->iconRecord()->iconURL().copy() : String();
}

#ifdef CAN_THEME_URL_ICON
static inline void loadDefaultIconRecord(IconRecord* defaultIconRecord)
{
     defaultIconRecord->loadImageFromResource("urlIcon");
}
#else
static inline void loadDefaultIconRecord(IconRecord* defaultIconRecord)
{
    static const unsigned char defaultIconData[] = { 0x4D, 0x4D, 0x00, 0x2A, 0x00, 0x00, 0x03, 0x32, 0x80, 0x00, 0x20, 0x50, 0x38, 0x24, 0x16, 0x0D, 0x07, 0x84, 0x42, 0x61, 0x50, 0xB8, 
        0x64, 0x08, 0x18, 0x0D, 0x0A, 0x0B, 0x84, 0xA2, 0xA1, 0xE2, 0x08, 0x5E, 0x39, 0x28, 0xAF, 0x48, 0x24, 0xD3, 0x53, 0x9A, 0x37, 0x1D, 0x18, 0x0E, 0x8A, 0x4B, 0xD1, 0x38, 
        0xB0, 0x7C, 0x82, 0x07, 0x03, 0x82, 0xA2, 0xE8, 0x6C, 0x2C, 0x03, 0x2F, 0x02, 0x82, 0x41, 0xA1, 0xE2, 0xF8, 0xC8, 0x84, 0x68, 0x6D, 0x1C, 0x11, 0x0A, 0xB7, 0xFA, 0x91, 
        0x6E, 0xD1, 0x7F, 0xAF, 0x9A, 0x4E, 0x87, 0xFB, 0x19, 0xB0, 0xEA, 0x7F, 0xA4, 0x95, 0x8C, 0xB7, 0xF9, 0xA9, 0x0A, 0xA9, 0x7F, 0x8C, 0x88, 0x66, 0x96, 0xD4, 0xCA, 0x69, 
        0x2F, 0x00, 0x81, 0x65, 0xB0, 0x29, 0x90, 0x7C, 0xBA, 0x2B, 0x21, 0x1E, 0x5C, 0xE6, 0xB4, 0xBD, 0x31, 0xB6, 0xE7, 0x7A, 0xBF, 0xDD, 0x6F, 0x37, 0xD3, 0xFD, 0xD8, 0xF2, 
        0xB6, 0xDB, 0xED, 0xAC, 0xF7, 0x03, 0xC5, 0xFE, 0x77, 0x53, 0xB6, 0x1F, 0xE6, 0x24, 0x8B, 0x1D, 0xFE, 0x26, 0x20, 0x9E, 0x1C, 0xE0, 0x80, 0x65, 0x7A, 0x18, 0x02, 0x01, 
        0x82, 0xC5, 0xA0, 0xC0, 0xF1, 0x89, 0xBA, 0x23, 0x30, 0xAD, 0x1F, 0xE7, 0xE5, 0x5B, 0x6D, 0xFE, 0xE7, 0x78, 0x3E, 0x1F, 0xEE, 0x97, 0x8B, 0xE7, 0x37, 0x9D, 0xCF, 0xE7, 
        0x92, 0x8B, 0x87, 0x0B, 0xFC, 0xA0, 0x8E, 0x68, 0x3F, 0xC6, 0x27, 0xA6, 0x33, 0xFC, 0x36, 0x5B, 0x59, 0x3F, 0xC1, 0x02, 0x63, 0x3B, 0x74, 0x00, 0x03, 0x07, 0x0B, 0x61, 
        0x00, 0x20, 0x60, 0xC9, 0x08, 0x00, 0x1C, 0x25, 0x9F, 0xE0, 0x12, 0x8A, 0xD5, 0xFE, 0x6B, 0x4F, 0x35, 0x9F, 0xED, 0xD7, 0x4B, 0xD9, 0xFE, 0x8A, 0x59, 0xB8, 0x1F, 0xEC, 
        0x56, 0xD3, 0xC1, 0xFE, 0x63, 0x4D, 0xF2, 0x83, 0xC6, 0xB6, 0x1B, 0xFC, 0x34, 0x68, 0x61, 0x3F, 0xC1, 0xA6, 0x25, 0xEB, 0xFC, 0x06, 0x58, 0x5C, 0x3F, 0xC0, 0x03, 0xE4, 
        0xC3, 0xFC, 0x04, 0x0F, 0x1A, 0x6F, 0xE0, 0xE0, 0x20, 0xF9, 0x61, 0x7A, 0x02, 0x28, 0x2B, 0xBC, 0x46, 0x25, 0xF3, 0xFC, 0x66, 0x3D, 0x99, 0x27, 0xF9, 0x7E, 0x6B, 0x1D, 
        0xC7, 0xF9, 0x2C, 0x5E, 0x1C, 0x87, 0xF8, 0xC0, 0x4D, 0x9A, 0xE7, 0xF8, 0xDA, 0x51, 0xB2, 0xC1, 0x68, 0xF2, 0x64, 0x1F, 0xE1, 0x50, 0xED, 0x0A, 0x04, 0x23, 0x79, 0x8A, 
        0x7F, 0x82, 0xA3, 0x39, 0x80, 0x7F, 0x80, 0xC2, 0xB1, 0x5E, 0xF7, 0x04, 0x2F, 0xB2, 0x10, 0x02, 0x86, 0x63, 0xC9, 0xCC, 0x07, 0xBF, 0x87, 0xF8, 0x4A, 0x38, 0xAF, 0xC1, 
        0x88, 0xF8, 0x66, 0x1F, 0xE1, 0xD9, 0x08, 0xD4, 0x8F, 0x25, 0x5B, 0x4A, 0x49, 0x97, 0x87, 0x39, 0xFE, 0x25, 0x12, 0x10, 0x68, 0xAA, 0x4A, 0x2F, 0x42, 0x29, 0x12, 0x69, 
        0x9F, 0xE1, 0xC1, 0x00, 0x67, 0x1F, 0xE1, 0x58, 0xED, 0x00, 0x83, 0x23, 0x49, 0x82, 0x7F, 0x81, 0x21, 0xE0, 0xFC, 0x73, 0x21, 0x00, 0x50, 0x7D, 0x2B, 0x84, 0x03, 0x83, 
        0xC2, 0x1B, 0x90, 0x06, 0x69, 0xFE, 0x23, 0x91, 0xAE, 0x50, 0x9A, 0x49, 0x32, 0xC2, 0x89, 0x30, 0xE9, 0x0A, 0xC4, 0xD9, 0xC4, 0x7F, 0x94, 0xA6, 0x51, 0xDE, 0x7F, 0x9D, 
        0x07, 0x89, 0xF6, 0x7F, 0x91, 0x85, 0xCA, 0x88, 0x25, 0x11, 0xEE, 0x50, 0x7C, 0x43, 0x35, 0x21, 0x60, 0xF1, 0x0D, 0x82, 0x62, 0x39, 0x07, 0x2C, 0x20, 0xE0, 0x80, 0x72, 
        0x34, 0x17, 0xA1, 0x80, 0xEE, 0xF0, 0x89, 0x24, 0x74, 0x1A, 0x2C, 0x93, 0xB3, 0x78, 0xCC, 0x52, 0x9D, 0x6A, 0x69, 0x56, 0xBB, 0x0D, 0x85, 0x69, 0xE6, 0x7F, 0x9E, 0x27, 
        0xB9, 0xFD, 0x50, 0x54, 0x47, 0xF9, 0xCC, 0x78, 0x9F, 0x87, 0xF9, 0x98, 0x70, 0xB9, 0xC2, 0x91, 0x2C, 0x6D, 0x1F, 0xE1, 0xE1, 0x00, 0xBF, 0x02, 0xC1, 0xF5, 0x18, 0x84,
        0x01, 0xE1, 0x48, 0x8C, 0x42, 0x07, 0x43, 0xC9, 0x76, 0x7F, 0x8B, 0x04, 0xE4, 0xDE, 0x35, 0x95, 0xAB, 0xB0, 0xF0, 0x5C, 0x55, 0x23, 0xF9, 0x7E, 0x7E, 0x9F, 0xE4, 0x0C, 
        0xA7, 0x55, 0x47, 0xC7, 0xF9, 0xE6, 0xCF, 0x1F, 0xE7, 0x93, 0x35, 0x52, 0x54, 0x63, 0x19, 0x46, 0x73, 0x1F, 0xE2, 0x61, 0x08, 0xF0, 0x82, 0xE1, 0x80, 0x92, 0xF9, 0x20, 
        0xC0, 0x28, 0x18, 0x0A, 0x05, 0xA1, 0xA2, 0xF8, 0x6E, 0xDB, 0x47, 0x49, 0xFE, 0x3E, 0x17, 0xB6, 0x61, 0x13, 0x1A, 0x29, 0x26, 0xA9, 0xFE, 0x7F, 0x92, 0x70, 0x69, 0xFE, 
        0x4C, 0x2F, 0x55, 0x01, 0xF1, 0x54, 0xD4, 0x35, 0x49, 0x4A, 0x69, 0x59, 0x83, 0x81, 0x58, 0x76, 0x9F, 0xE2, 0x20, 0xD6, 0x4C, 0x9B, 0xA0, 0x48, 0x1E, 0x0B, 0xB7, 0x48, 
        0x58, 0x26, 0x11, 0x06, 0x42, 0xE8, 0xA4, 0x40, 0x17, 0x27, 0x39, 0x00, 0x60, 0x2D, 0xA4, 0xC3, 0x2C, 0x7F, 0x94, 0x56, 0xE4, 0xE1, 0x77, 0x1F, 0xE5, 0xB9, 0xD7, 0x66, 
        0x1E, 0x07, 0xB3, 0x3C, 0x63, 0x1D, 0x35, 0x49, 0x0E, 0x63, 0x2D, 0xA2, 0xF1, 0x12, 0x60, 0x1C, 0xE0, 0xE0, 0x52, 0x1B, 0x8B, 0xAC, 0x38, 0x0E, 0x07, 0x03, 0x60, 0x28, 
        0x1C, 0x0E, 0x87, 0x00, 0xF0, 0x66, 0x27, 0x11, 0xA2, 0xC1, 0x02, 0x5A, 0x1C, 0xE4, 0x21, 0x83, 0x1F, 0x13, 0x86, 0xFA, 0xD2, 0x55, 0x1D, 0xD6, 0x61, 0xBC, 0x77, 0xD3, 
        0xE6, 0x91, 0xCB, 0x4C, 0x90, 0xA6, 0x25, 0xB8, 0x2F, 0x90, 0xC5, 0xA9, 0xCE, 0x12, 0x07, 0x02, 0x91, 0x1B, 0x9F, 0x68, 0x00, 0x16, 0x76, 0x0D, 0xA1, 0x00, 0x08, 0x06, 
        0x03, 0x81, 0xA0, 0x20, 0x1A, 0x0D, 0x06, 0x80, 0x30, 0x24, 0x12, 0x89, 0x20, 0x98, 0x4A, 0x1F, 0x0F, 0x21, 0xA0, 0x9E, 0x36, 0x16, 0xC2, 0x88, 0xE6, 0x48, 0x9B, 0x83, 
        0x31, 0x1C, 0x55, 0x1E, 0x43, 0x59, 0x1A, 0x56, 0x1E, 0x42, 0xF0, 0xFA, 0x4D, 0x1B, 0x9B, 0x08, 0xDC, 0x5B, 0x02, 0xA1, 0x30, 0x7E, 0x3C, 0xEE, 0x5B, 0xA6, 0xDD, 0xB8, 
        0x6D, 0x5B, 0x62, 0xB7, 0xCD, 0xF3, 0x9C, 0xEA, 0x04, 0x80, 0x80, 0x00, 0x00, 0x0E, 0x01, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x01, 0x00, 0x10, 0x00, 0x00, 0x01, 0x01, 
        0x00, 0x03, 0x00, 0x00, 0x00, 0x01, 0x00, 0x10, 0x00, 0x00, 0x01, 0x02, 0x00, 0x03, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x03, 0xE0, 0x01, 0x03, 0x00, 0x03, 0x00, 0x00, 
        0x00, 0x01, 0x00, 0x05, 0x00, 0x00, 0x01, 0x06, 0x00, 0x03, 0x00, 0x00, 0x00, 0x01, 0x00, 0x02, 0x00, 0x00, 0x01, 0x11, 0x00, 0x04, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 
        0x00, 0x08, 0x01, 0x15, 0x00, 0x03, 0x00, 0x00, 0x00, 0x01, 0x00, 0x04, 0x00, 0x00, 0x01, 0x16, 0x00, 0x04, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x02, 0x00, 0x01, 0x17, 
        0x00, 0x04, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x03, 0x29, 0x01, 0x1A, 0x00, 0x05, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x03, 0xE8, 0x01, 0x1B, 0x00, 0x05, 0x00, 0x00, 
        0x00, 0x01, 0x00, 0x00, 0x03, 0xF0, 0x01, 0x1C, 0x00, 0x03, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01, 0x00, 0x00, 0x01, 0x28, 0x00, 0x03, 0x00, 0x00, 0x00, 0x01, 0x00, 0x02, 
        0x00, 0x00, 0x01, 0x52, 0x00, 0x03, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08, 0x00, 0x08, 0x00, 0x08, 0x00, 0x08, 0x00, 0x0A, 
        0xFC, 0x80, 0x00, 0x00, 0x27, 0x10, 0x00, 0x0A, 0xFC, 0x80, 0x00, 0x00, 0x27, 0x10 };
        
    DEFINE_STATIC_LOCAL(RefPtr<SharedBuffer>, defaultIconBuffer, (SharedBuffer::create(defaultIconData, sizeof(defaultIconData))));
    defaultIconRecord->setImageData(defaultIconBuffer);
}
#endif

Image* IconDatabase::defaultIcon(const IntSize& size)
{
    ASSERT_NOT_SYNC_THREAD();

    
    if (!m_defaultIconRecord) {
        m_defaultIconRecord = IconRecord::create("urlIcon");
        loadDefaultIconRecord(m_defaultIconRecord.get());
    }
    
    return m_defaultIconRecord->image(size);
}


void IconDatabase::retainIconForPageURL(const String& pageURLOriginal)
{    
    ASSERT_NOT_SYNC_THREAD();
    
    // Cannot do anything with pageURLOriginal that would end up storing it without deep copying first
    
    if (!isEnabled() || pageURLOriginal.isEmpty())
        return;
       
    MutexLocker locker(m_urlAndIconLock);

    PageURLRecord* record = m_pageURLToRecordMap.get(pageURLOriginal);
    
    String pageURL;
    
    if (!record) {
        pageURL = pageURLOriginal.copy();

        record = new PageURLRecord(pageURL);
        m_pageURLToRecordMap.set(pageURL, record);
    }
    
    if (!record->retain()) {
        if (pageURL.isNull())
            pageURL = pageURLOriginal.copy();

        // This page just had its retain count bumped from 0 to 1 - Record that fact
        m_retainedPageURLs.add(pageURL);

        // If we read the iconURLs yet, we want to avoid any pageURL->iconURL lookups and the pageURLsPendingDeletion is moot, 
        // so we bail here and skip those steps
        if (!m_iconURLImportComplete)
            return;

        MutexLocker locker(m_pendingSyncLock);
        // If this pageURL waiting to be sync'ed, update the sync record
        // This saves us in the case where a page was ready to be deleted from the database but was just retained - so theres no need to delete it!
        if (!m_privateBrowsingEnabled && m_pageURLsPendingSync.contains(pageURL)) {
            LOG(IconDatabase, "Bringing %s back from the brink", pageURL.ascii().data());
            m_pageURLsPendingSync.set(pageURL, record->snapshot());
        }
    }
}

void IconDatabase::releaseIconForPageURL(const String& pageURLOriginal)
{
    ASSERT_NOT_SYNC_THREAD();
        
    // Cannot do anything with pageURLOriginal that would end up storing it without deep copying first
    
    if (!isEnabled() || pageURLOriginal.isEmpty())
        return;
    
    MutexLocker locker(m_urlAndIconLock);

    // Check if this pageURL is actually retained
    if (!m_retainedPageURLs.contains(pageURLOriginal)) {
        LOG_ERROR("Attempting to release icon for URL %s which is not retained", urlForLogging(pageURLOriginal).ascii().data());
        return;
    }
    
    // Get its retain count - if it's retained, we'd better have a PageURLRecord for it
    PageURLRecord* pageRecord = m_pageURLToRecordMap.get(pageURLOriginal);
    ASSERT(pageRecord);
    LOG(IconDatabase, "Releasing pageURL %s to a retain count of %i", urlForLogging(pageURLOriginal).ascii().data(), pageRecord->retainCount() - 1);
    ASSERT(pageRecord->retainCount() > 0);
        
    // If it still has a positive retain count, store the new count and bail
    if (pageRecord->release())
        return;
        
    // This pageRecord has now been fully released.  Do the appropriate cleanup
    LOG(IconDatabase, "No more retainers for PageURL %s", urlForLogging(pageURLOriginal).ascii().data());
    m_pageURLToRecordMap.remove(pageURLOriginal);
    m_retainedPageURLs.remove(pageURLOriginal);       
    
    // Grab the iconRecord for later use (and do a sanity check on it for kicks)
    IconRecord* iconRecord = pageRecord->iconRecord();
    
    ASSERT(!iconRecord || (iconRecord && m_iconURLToRecordMap.get(iconRecord->iconURL()) == iconRecord));

    {
        MutexLocker locker(m_pendingReadingLock);
        
        // Since this pageURL is going away, there's no reason anyone would ever be interested in its read results    
        if (!m_iconURLImportComplete)
            m_pageURLsPendingImport.remove(pageURLOriginal);
        m_pageURLsInterestedInIcons.remove(pageURLOriginal);
        
        // If this icon is down to it's last retainer, we don't care about reading it in from disk anymore
        if (iconRecord && iconRecord->hasOneRef()) {
            m_iconURLToRecordMap.remove(iconRecord->iconURL());
            m_iconsPendingReading.remove(iconRecord);
        }
    }
    
    // Mark stuff for deletion from the database only if we're not in private browsing
    if (!m_privateBrowsingEnabled) {
        MutexLocker locker(m_pendingSyncLock);
        m_pageURLsPendingSync.set(pageURLOriginal.copy(), pageRecord->snapshot(true));
    
        // If this page is the last page to refer to a particular IconRecord, that IconRecord needs to
        // be marked for deletion
        if (iconRecord && iconRecord->hasOneRef())
            m_iconsPendingSync.set(iconRecord->iconURL(), iconRecord->snapshot(true));
    }
    
    delete pageRecord;

    if (isOpen())
        scheduleOrDeferSyncTimer();
}

void IconDatabase::setIconDataForIconURL(PassRefPtr<SharedBuffer> dataOriginal, const String& iconURLOriginal)
{    
    ASSERT_NOT_SYNC_THREAD();
    
    // Cannot do anything with dataOriginal or iconURLOriginal that would end up storing them without deep copying first
    
    if (!isOpen() || iconURLOriginal.isEmpty())
        return;
    
    RefPtr<SharedBuffer> data = dataOriginal ? dataOriginal->copy() : 0;
    String iconURL = iconURLOriginal.copy();
    
    Vector<String> pageURLs;
    {
        MutexLocker locker(m_urlAndIconLock);
    
        // If this icon was pending a read, remove it from that set because this new data should override what is on disk
        RefPtr<IconRecord> icon = m_iconURLToRecordMap.get(iconURL);
        if (icon) {
            MutexLocker locker(m_pendingReadingLock);
            m_iconsPendingReading.remove(icon.get());
        } else
            icon = getOrCreateIconRecord(iconURL);
    
        // Update the data and set the time stamp
        icon->setImageData(data);
        icon->setTimestamp((int)currentTime());
        
        // Copy the current retaining pageURLs - if any - to notify them of the change
        pageURLs.appendRange(icon->retainingPageURLs().begin(), icon->retainingPageURLs().end());
        
        // Mark the IconRecord as requiring an update to the database only if private browsing is disabled
        if (!m_privateBrowsingEnabled) {
            MutexLocker locker(m_pendingSyncLock);
            m_iconsPendingSync.set(iconURL, icon->snapshot());
        }

        if (icon->hasOneRef()) {
            ASSERT(icon->retainingPageURLs().isEmpty());
            LOG(IconDatabase, "Icon for icon url %s is about to be destroyed - removing mapping for it", urlForLogging(icon->iconURL()).ascii().data());
            m_iconURLToRecordMap.remove(icon->iconURL());
        }
    }

    // Send notification out regarding all PageURLs that retain this icon
    // But not if we're on the sync thread because that implies this mapping
    // comes from the initial import which we don't want notifications for
    if (!IS_ICON_SYNC_THREAD()) {
        // Start the timer to commit this change - or further delay the timer if it was already started
        scheduleOrDeferSyncTimer();

        // Informal testing shows that draining the autorelease pool every 25 iterations is about as low as we can go
        // before performance starts to drop off, but we don't want to increase this number because then accumulated memory usage will go up        
        AutodrainedPool pool(25);

        for (unsigned i = 0; i < pageURLs.size(); ++i) {
            LOG(IconDatabase, "Dispatching notification that retaining pageURL %s has a new icon", urlForLogging(pageURLs[i]).ascii().data());
            m_client->dispatchDidAddIconForPageURL(pageURLs[i]);

            pool.cycle();
        }
    }
}

void IconDatabase::setIconURLForPageURL(const String& iconURLOriginal, const String& pageURLOriginal)
{    
    ASSERT_NOT_SYNC_THREAD();

    // Cannot do anything with iconURLOriginal or pageURLOriginal that would end up storing them without deep copying first
    
    ASSERT(!iconURLOriginal.isEmpty());
        
    if (!isOpen() || pageURLOriginal.isEmpty())
        return;
    
    String iconURL, pageURL;
    
    {
        MutexLocker locker(m_urlAndIconLock);

        PageURLRecord* pageRecord = m_pageURLToRecordMap.get(pageURLOriginal);
        
        // If the urls already map to each other, bail.
        // This happens surprisingly often, and seems to cream iBench performance
        if (pageRecord && pageRecord->iconRecord() && pageRecord->iconRecord()->iconURL() == iconURLOriginal)
            return;
            
        pageURL = pageURLOriginal.copy();
        iconURL = iconURLOriginal.copy();

        if (!pageRecord) {
            pageRecord = new PageURLRecord(pageURL);
            m_pageURLToRecordMap.set(pageURL, pageRecord);
        }

        RefPtr<IconRecord> iconRecord = pageRecord->iconRecord();

        // Otherwise, set the new icon record for this page
        pageRecord->setIconRecord(getOrCreateIconRecord(iconURL));

        // If the current icon has only a single ref left, it is about to get wiped out. 
        // Remove it from the in-memory records and don't bother reading it in from disk anymore
        if (iconRecord && iconRecord->hasOneRef()) {
            ASSERT(iconRecord->retainingPageURLs().size() == 0);
            LOG(IconDatabase, "Icon for icon url %s is about to be destroyed - removing mapping for it", urlForLogging(iconRecord->iconURL()).ascii().data());
            m_iconURLToRecordMap.remove(iconRecord->iconURL());