C++ String::characters方法代码示例

jstring WebCoreResourceLoader::RedirectedToUrl(JNIEnv* env, jobject obj,
        jstring baseUrl, jstring redirectTo, jint nativeResponse)
{
#ifdef ANDROID_INSTRUMENT
    TimeCounterAuto counter(TimeCounter::ResourceTimeCounter);
#endif
    LOGV("webcore_resourceloader redirectedToUrl");
    WebCore::ResourceHandle* handle = GET_NATIVE_HANDLE(env, obj);
    LOG_ASSERT(handle, "nativeRedirectedToUrl must take a valid handle!");
    // ResourceLoader::didFail() can set handle to be NULL, we need to check
    if (!handle)
        return NULL;

    LOG_ASSERT(handle->client(), "Why do we not have a client?");
    WebCore::ResourceRequest r = handle->request();
    WebCore::KURL url(WebCore::KURL(WebCore::ParsedURLString, to_string(env, baseUrl)),
            to_string(env, redirectTo));
    r.setURL(url);
    if (r.httpMethod() == "POST") {
        r.setHTTPMethod("GET");
        r.clearHTTPReferrer();
        r.setHTTPBody(0);
        r.setHTTPContentType("");
    }
    WebCore::ResourceResponse* response = (WebCore::ResourceResponse*)nativeResponse;
    // If the url fails to resolve the relative path, return null.
    if (url.protocol().isEmpty()) {
        delete response;
        return NULL;
    }
    handle->client()->willSendRequest(handle, r, *response);
    delete response;
    WebCore::String s = url.string();
    return env->NewString((unsigned short*)s.characters(), s.length());
}

static void write_string(WTF::Vector<char>& v, const WebCore::String& str)
{
    unsigned strLen = str.length();
    // Only do work if the string has data.
    if (strLen) {
        // Determine how much to grow the vector. Use the worst case for utf8 to
        // avoid reading the string twice. Add sizeof(unsigned) to hold the
        // string length in utf8.
        unsigned vectorLen = v.size() + sizeof(unsigned);
        unsigned length = (strLen << 2) + vectorLen;
        // Grow the vector. This will change the value of v.size() but we
        // remember the original size above.
        v.grow(length);
        // Grab the position to write to.
        char* data = v.begin() + vectorLen;
        // Write the actual string
        int l = SkUTF16_ToUTF8(str.characters(), strLen, data);
        LOGV("Writing string       %d %.*s", l, l, data);
        // Go back and write the utf8 length. Subtract sizeof(unsigned) from
        // data to get the position to write the length.
        memcpy(data - sizeof(unsigned), (char*)&l, sizeof(unsigned));
        // Shrink the internal state of the vector so we match what was
        // actually written.
        v.shrink(vectorLen + l);
    } else
        v.append((char*)&strLen, sizeof(unsigned));
}

static jobject GetOrigins(JNIEnv* env, jobject obj)
{
    Vector<RefPtr<WebCore::SecurityOrigin> > coreOrigins;
    WebCore::DatabaseTracker::tracker().origins(coreOrigins);
    Vector<WebCore::KURL> manifestUrls;
    if (WebCore::cacheStorage().manifestURLs(&manifestUrls)) {
        int size = manifestUrls.size();
        for (int i = 0; i < size; ++i) {
            RefPtr<WebCore::SecurityOrigin> manifestOrigin = WebCore::SecurityOrigin::create(manifestUrls[i]);
            if (manifestOrigin.get() == 0)
                continue;
            coreOrigins.append(manifestOrigin);
        }
    }

    jclass setClass = env->FindClass("java/util/HashSet");
    jmethodID cid = env->GetMethodID(setClass, "<init>", "()V");
    jmethodID mid = env->GetMethodID(setClass, "add", "(Ljava/lang/Object;)Z");
    jobject set = env->NewObject(setClass, cid);

    for (unsigned i = 0; i < coreOrigins.size(); ++i) {
        WebCore::SecurityOrigin* origin = coreOrigins[i].get();
        WebCore::String url = origin->toString();
        jstring jUrl = env->NewString(url.characters(), url.length());
        env->CallBooleanMethod(set, mid, jUrl);
        env->DeleteLocalRef(jUrl);
    }

    return set;
}

HRESULT STDMETHODCALLTYPE DOMHTMLFormElement::method( 
        /* [retval][out] */ BSTR* result)
{
    ASSERT(m_element && m_element->hasTagName(formTag));
    WebCore::String methodString = static_cast<HTMLFormElement*>(m_element)->method();
    *result = BString(methodString.characters(), methodString.length()).release();
    return S_OK;
}

HRESULT STDMETHODCALLTYPE DOMHTMLElement::innerText( 
        /* [retval][out] */ BSTR* result)
{
    ASSERT(m_element && m_element->isHTMLElement());
    WebCore::String innerTextString = static_cast<HTMLElement*>(m_element)->innerText();
    *result = BString(innerTextString.characters(), innerTextString.length()).release();
    return S_OK;
}

HRESULT STDMETHODCALLTYPE DOMCSSStyleDeclaration::getPropertyValue( 
    /* [in] */ BSTR propertyName,
    /* [retval][out] */ BSTR* result)
{
    WebCore::String propertyNameString(propertyName);
    WebCore::String value = m_style->getPropertyValue(propertyNameString);
    *result = SysAllocStringLen(value.characters(), value.length());
    if (value.length() && !*result)
        return E_OUTOFMEMORY;
    return S_OK;
}

HRESULT STDMETHODCALLTYPE DOMHTMLTextAreaElement::value( 
        /* [retval][out] */ BSTR* result)
{
    ASSERT(m_element && m_element->hasTagName(textareaTag));
    HTMLTextAreaElement* textareaElement = static_cast<HTMLTextAreaElement*>(m_element);
    WebCore::String valueString = textareaElement->value();
    *result = BString(valueString.characters(), valueString.length()).release();
    if (valueString.length() && !*result)
        return E_OUTOFMEMORY;
    return S_OK;
}

/*
* This static method is called to check to see if a POST response is in
* the cache. This may be slow, but is only used during a navigation to
* a POST response.
*/
bool WebCoreResourceLoader::willLoadFromCache(const WebCore::KURL& url, int64_t identifier)
{
    JNIEnv* env = JSC::Bindings::getJNIEnv();
    WebCore::String urlStr = url.string();
    jstring jUrlStr = env->NewString(urlStr.characters(), urlStr.length());
    jclass resourceLoader = env->FindClass("android/webkit/LoadListener");
    bool val = env->CallStaticBooleanMethod(resourceLoader, 
            gResourceLoader.mWillLoadFromCacheMethodID, jUrlStr, identifier);
    checkException(env);
    env->DeleteLocalRef(jUrlStr);

    return val;
}

static bool isValidProtocolString(const WebCore::String& protocol)
{
    if (protocol.isNull())
        return true;
    if (protocol.isEmpty())
        return false;
    const UChar* characters = protocol.characters();
    for (size_t i = 0; i < protocol.length(); i++) {
        if (characters[i] < 0x21 || characters[i] > 0x7E)
            return false;
    }
    return true;
}