C++ String::substring方法代码示例

void DOMTokenList::setValueInternal(const WTF::String& value)
{
    // Clear tokens but not capacity.
    m_tokens.shrink(0);

    HashSet<AtomicString> addedTokens;
    // https://dom.spec.whatwg.org/#ordered%20sets
    for (unsigned start = 0; ; ) {
        while (start < value.length() && isHTMLSpace(value[start]))
            ++start;
        if (start >= value.length())
            break;
        unsigned end = start + 1;
        while (end < value.length() && !isHTMLSpace(value[end]))
            ++end;

        AtomicString token = value.substring(start, end - start);
        if (!addedTokens.contains(token)) {
            m_tokens.append(token);
            addedTokens.add(token);
        }

        start = end + 1;
    }

    m_tokens.shrinkToFit();
    m_cachedValue = nullAtom;
}

static WTF::String urlSuitableForTestResult(const WTF::String& uriString)
{
    if (uriString.isEmpty() || !uriString.startsWith("file://"))
        return uriString;

    const size_t index = uriString.reverseFind('/');
    return (index == WTF::notFound) ? uriString : uriString.substring(index + 1);
}

bool MockSpellCheck::spellCheckWord(const WebString& text, int* misspelledOffset, int* misspelledLength)
{
    ASSERT(misspelledOffset);
    ASSERT(misspelledLength);

    // Initialize this spellchecker.
    initializeIfNeeded();

    // Reset the result values as our spellchecker does.
    *misspelledOffset = 0;
    *misspelledLength = 0;

    // Convert to a String because we store String instances in
    // m_misspelledWords and WebString has no find().
    const WTF::String stringText(text.data(), text.length());

    // Extract the first possible English word from the given string.
    // The given string may include non-ASCII characters or numbers. So, we
    // should filter out such characters before start looking up our
    // misspelled-word table.
    // (This is a simple version of our SpellCheckWordIterator class.)
    // If the given string doesn't include any ASCII characters, we can treat the
    // string as valid one.
    // Unfortunately, This implementation splits a contraction, i.e. "isn't" is
    // split into two pieces "isn" and "t". This is OK because webkit tests
    // don't have misspelled contractions.
    int wordOffset = stringText.find(isASCIIAlpha);
    if (wordOffset == -1)
        return true;
    int wordEnd = stringText.find(isNotASCIIAlpha, wordOffset);
    int wordLength = wordEnd == -1 ? stringText.length() - wordOffset : wordEnd - wordOffset;

    // Look up our misspelled-word table to check if the extracted word is a
    // known misspelled word, and return the offset and the length of the
    // extracted word if this word is a known misspelled word.
    // (See the comment in MockSpellCheck::initializeIfNeeded() why we use a
    // misspelled-word table.)
    WTF::String word = stringText.substring(wordOffset, wordLength);
    if (!m_misspelledWords.contains(word))
        return true;

    *misspelledOffset = wordOffset;
    *misspelledLength = wordLength;
    return false;
}

static void onConsoleMessage(Ewk_View_Smart_Data*, const char* message, unsigned int lineNumber, const char*)
{
    // Tests expect only the filename part of local URIs
    WTF::String newMessage = message;
    if (!newMessage.isEmpty()) {
        const size_t fileProtocol = newMessage.find("file://");
        if (fileProtocol != WTF::notFound)
            newMessage = newMessage.left(fileProtocol) + urlSuitableForTestResult(newMessage.substring(fileProtocol));
    }

    // Ignore simple translation-related messages and unnecessary messages
    if (newMessage.contains("Localized string") || newMessage.contains("Protocol Error: the message is for non-existing domain 'Profiler'"))
        return;

    printf("CONSOLE MESSAGE: ");
    if (lineNumber)
        printf("line %u: ", lineNumber);
    printf("%s\n", newMessage.utf8().data());
}

void WebHistoryItem::updateHistoryItem(WebCore::HistoryItem* item) {
    // Do not want to update during inflation.
    if (!m_active)
        return;
    WebHistoryItem* webItem = this;
    // Now we need to update the top-most WebHistoryItem based on the top-most
    // HistoryItem.
    if (m_parent) {
        webItem = m_parent.get();
        if (webItem->hasOneRef()) {
            // if the parent only has one ref, it is from this WebHistoryItem.
            // This means that the matching WebCore::HistoryItem has been freed.
            // This can happen during clear().
            ALOGW("Can't updateHistoryItem as the top HistoryItem is gone");
            return;
        }
        while (webItem->parent())
            webItem = webItem->parent();
        item = webItem->historyItem();
        if (!item) {
            // If a HistoryItem only exists for page cache, it is possible that
            // the parent HistoryItem destroyed before the child HistoryItem. If
            // it happens, skip updating.
            ALOGW("Can't updateHistoryItem as the top HistoryItem is gone");
            return;
        }
    }
    JNIEnv* env = JSC::Bindings::getJNIEnv();
    if (!env)
        return;

    MutexLocker locker(webItem->m_lock);

    // TODO: Figure out if we can't just use item->urlString() instead...
    const WTF::String urlString = WebFrame::convertIDNToUnicode(item->url());
    webItem->m_url = urlString.threadsafeCopy();
    const WTF::String originalUrlString = WebFrame::convertIDNToUnicode(item->originalURL());
    webItem->m_originalUrl = originalUrlString.threadsafeCopy();
    const WTF::String& titleString = item->title();
    webItem->m_title = titleString.threadsafeCopy();

    // Try to get the favicon from the history item. For some pages like Grand
    // Prix, there are history items with anchors. If the icon fails for the
    // item, try to get the icon using the url without the ref.
    jobject favicon = NULL;
    WTF::String url = item->urlString();
    if (item->url().hasFragmentIdentifier()) {
        int refIndex = url.reverseFind('#');
        url = url.substring(0, refIndex);
    }
    // FIXME: This method should not be used from outside WebCore and will be removed.
    // http://trac.webkit.org/changeset/81484
    WebCore::Image* icon = WebCore::iconDatabase().synchronousIconForPageURL(url, WebCore::IntSize(16, 16));
    delete webItem->m_favicon;
    webItem->m_favicon = webcoreImageToSkBitmap(icon);
    if (webItem->m_faviconCached) {
        env->DeleteGlobalRef(webItem->m_faviconCached);
        webItem->m_faviconCached = 0;
    }

    webItem->m_data.clear();
    WebHistory::Flatten(env, webItem->m_data, item);
    if (webItem->m_dataCached) {
        env->DeleteGlobalRef(webItem->m_dataCached);
        webItem->m_dataCached = 0;
    }
}

void WebHistoryItem::updateHistoryItem(WebCore::HistoryItem* item) {
    // Do not want to update during inflation.
    if (!m_active)
        return;
    WebHistoryItem* webItem = this;
    // Now we need to update the top-most WebHistoryItem based on the top-most
    // HistoryItem.
    if (m_parent) {
        webItem = m_parent.get();
        if (webItem->hasOneRef()) {
            // if the parent only has one ref, it is from this WebHistoryItem.
            // This means that the matching WebCore::HistoryItem has been freed.
            // This can happen during clear().
            LOGW("Can't updateHistoryItem as the top HistoryItem is gone");
            return;
        }
        while (webItem->parent())
            webItem = webItem->parent();
        item = webItem->historyItem();
        if (!item) {
            // If a HistoryItem only exists for page cache, it is possible that
            // the parent HistoryItem destroyed before the child HistoryItem. If
            // it happens, skip updating.
            LOGW("Can't updateHistoryItem as the top HistoryItem is gone");
            return;
        }
    }
    JNIEnv* env = JSC::Bindings::getJNIEnv();
    if (!env)
        return;

    // Don't do anything if the item has been gc'd already
    AutoJObject realItem = getRealObject(env, webItem->m_object);
    if (!realItem.get())
        return;

    const WTF::String urlString = WebFrame::convertIDNToUnicode(item->url());
    jstring urlStr = NULL;
    if (!urlString.isNull())
        urlStr = wtfStringToJstring(env, urlString);
    const WTF::String originalUrlString = WebFrame::convertIDNToUnicode(item->originalURL());
    jstring originalUrlStr = NULL;
    if (!originalUrlString.isNull())
        originalUrlStr = wtfStringToJstring(env, originalUrlString);
    const WTF::String& titleString = item->title();
    jstring titleStr = NULL;
    if (!titleString.isNull())
        titleStr = wtfStringToJstring(env, titleString);

    // Try to get the favicon from the history item. For some pages like Grand
    // Prix, there are history items with anchors. If the icon fails for the
    // item, try to get the icon using the url without the ref.
    jobject favicon = NULL;
    WTF::String url = item->urlString();
    if (item->url().hasFragmentIdentifier()) {
        int refIndex = url.reverseFind('#');
        url = url.substring(0, refIndex);
    }
    // FIXME: This method should not be used from outside WebCore and will be removed.
    // http://trac.webkit.org/changeset/81484
    WebCore::Image* icon = WebCore::iconDatabase().synchronousIconForPageURL(url, WebCore::IntSize(16, 16));

    if (icon)
        favicon = webcoreImageToJavaBitmap(env, icon);

    WTF::Vector<char> data;
    jbyteArray array = WebHistory::Flatten(env, data, item);
    env->CallVoidMethod(realItem.get(), gWebHistoryItem.mUpdate, urlStr,
            originalUrlStr, titleStr, favicon, array);
    env->DeleteLocalRef(urlStr);
    env->DeleteLocalRef(originalUrlStr);
    env->DeleteLocalRef(titleStr);
    if (favicon)
        env->DeleteLocalRef(favicon);
    env->DeleteLocalRef(array);
}