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** This file is part of the QtWebEngine module of the Qt Toolkit.
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** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or later as published by the Free
** Software Foundation and appearing in the file LICENSE.GPL included in
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****************************************************************************/

#include "renderer/content_renderer_client_qt.h"

#include "base/strings/utf_string_conversions.h"
#include "chrome/common/localized_error.h"
#include "components/visitedlink/renderer/visitedlink_slave.h"
#include "content/public/renderer/render_thread.h"
#include "content/public/renderer/render_view.h"
#include "net/base/net_errors.h"
#include "third_party/WebKit/public/platform/WebURLError.h"
#include "third_party/WebKit/public/platform/WebURLRequest.h"
#include "ui/base/resource/resource_bundle.h"
#include "ui/base/webui/jstemplate_builder.h"

#include "renderer/qt_render_view_observer.h"

#include "grit/renderer_resources.h"

static const char kHttpErrorDomain[] = "http";

ContentRendererClientQt::ContentRendererClientQt()
{
}

ContentRendererClientQt::~ContentRendererClientQt()
{
}

void ContentRendererClientQt::RenderThreadStarted()
{
    m_visitedLinkSlave.reset(new visitedlink::VisitedLinkSlave);
    content::RenderThread::Get()->AddObserver(m_visitedLinkSlave.data());
}

void ContentRendererClientQt::RenderViewCreated(content::RenderView* render_view)
{
    // RenderViewObserver destroys itself with its RenderView.
    new QtRenderViewObserver(render_view);
}

bool ContentRendererClientQt::HasErrorPage(int httpStatusCode, std::string *errorDomain)
{
    // Use an internal error page, if we have one for the status code.
    if (!LocalizedError::HasStrings(LocalizedError::kHttpErrorDomain, httpStatusCode)) {
        return false;
    }

    *errorDomain = LocalizedError::kHttpErrorDomain;
    return true;
}

// To tap into the chromium localized strings. Ripped from the chrome layer (highly simplified).
void ContentRendererClientQt::GetNavigationErrorStrings(content::RenderView* render_view, blink::WebFrame *frame, const blink::WebURLRequest &failed_request, const blink::WebURLError &error, std::string *error_html, base::string16 *error_description)
{
    Q_UNUSED(frame)

    const bool isPost = EqualsASCII(failed_request.httpMethod(), "POST");

    if (error_html) {
      // Use a local error page.
      int resource_id;
      base::DictionaryValue error_strings;

      const std::string locale = content::RenderThread::Get()->GetLocale();
      // TODO(elproxy): We could potentially get better diagnostics here by first calling NetErrorHelper::GetErrorStringsForDnsProbe
      LocalizedError::GetStrings(error.reason, error.domain.utf8(),
                                 error.unreachableURL, isPost, error.staleCopyInCache && !isPost,
                                 locale, render_view->GetAcceptLanguages(), scoped_ptr<LocalizedError::ErrorPageParams>(),
                                 &error_strings);
      resource_id = IDR_NET_ERROR_HTML;


      const base::StringPiece template_html(ui::ResourceBundle::GetSharedInstance().GetRawDataResource(resource_id));
      if (template_html.empty())
        NOTREACHED() << "unable to load template. ID: " << resource_id;
      else // "t" is the id of the templates root node.
        *error_html = webui::GetTemplatesHtml(template_html, &error_strings, "t");
    }

    if (error_description) {
        *error_description = LocalizedError::GetErrorDetails(error, isPost);
    }
}

unsigned long long ContentRendererClientQt::VisitedLinkHash(const char *canonicalUrl, size_t length)
{
    return m_visitedLinkSlave->ComputeURLFingerprint(canonicalUrl, length);
}

bool ContentRendererClientQt::IsLinkVisited(unsigned long long linkHash)
{
    return m_visitedLinkSlave->IsVisited(linkHash);
}