/*

* Copyright (c) 2007 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:  

*

*/

#include "config.h"

#include "FormFillController.h"

#include "Event.h"

#include "Timer.h"

#include "String.h"

#include "HTMLInputElement.h"

#include "HTMLFormElement.h"

#include "FontCache.h"

#include "FontPlatformData.h"

#include "FormDataStore.h"

#include "FormLoginStore.h"

#include "KURL.h"

#include "HTMLNames.h"

#include "DeprecatedString.h"

#include "Document.h"

#include "IntRect.h"

#include "Settings.h"

#include "FormFillCallback.h"

#include "FormFillPopup.h"

#include "PlatformFontCache.h"

#include "StaticObjectsContainer.h"

namespace WebCore {

static const double kSearchStartTimeout = 0.5f;

FormFillController::FormFillController() 

                    : m_popup(0), m_callback(0), m_inputElement(0), m_formDB(0), m_passwdDB(0)

{

    m_searchTimer = new Timer<FormFillController>(this, FormFillController::fireSearch);

}

FormFillController::~FormFillController()

{

    delete m_searchTimer;

    delete m_formDB;

    delete m_passwdDB;

    if (m_popup) {

        delete m_popup;

        m_popup = NULL;

    }

}

void FormFillController::fireSearch(Timer<FormFillController>*)

{

    // start searching

    if(!m_formDB) {

        m_formDB = new FormDataStore(this);

    }

    // search is synchrous

    m_formDB->search(m_searchParam, m_searchValue, m_results);

    updatePopupView();

}

void FormFillController::updatePopupView()

{

    if(m_results.size() > 0) {

        // lazily create the popup view

        PlatformFontCache* cache = StaticObjectsContainer::instance()->fontCache();

        float zoomFactor =  (float)cache->fontZoomFactor();

        if(!m_popup) {

            // system font to be used by popup

            float newFont = 12.0f * zoomFactor /100.0f;

            int textSize = 2;

            FontPlatformData* font = FontCache::getDeviceDefaultFont(textSize*newFont);

            m_popup = m_callback->createFormFillPopup(font->Font());

        }

        if (!m_popup) {

            return;

        }

        m_popup->clear();

        // fill the popup

        for(int i=0; i<m_results.size(); ++i)

            m_popup->addRow(m_results.at(i));

        TRect inputRect = m_inputElement->getRect();

        TInt  widthOffset = (zoomFactor - 100)*inputRect.Width()/100;

        TInt  heightOffset = (zoomFactor - 100)*inputRect.Height()/100;

        inputRect.Resize(widthOffset,heightOffset);

        m_popup->setLocationHintInDoc(inputRect, m_inputElement->document()->frame());

        m_popup->invalidate();

    } else if(m_popup) {

        m_popup->clear();

    }    

}

void FormFillController::setInputElement(MFormFillCallback* callback, HTMLInputElement* input)

{

    clearInputElement();

    m_inputElement = input;

    m_callback = callback;

    startSearch(m_inputElement->name(), m_inputElement->value() );

}

void FormFillController::clearInputElement()

{

    stopSearch();

    m_inputElement = NULL;

    m_callback = NULL;

    m_results.clear();

    m_searchParam = String();

    m_searchValue = String();

    if (m_popup) {

        m_popup->clear();

    }

}

void FormFillController::startSearch()

{

    startSearch(m_inputElement->name(), m_inputElement->value() );

}

void FormFillController::startSearch(const String& name_, const String& value_)

{

    if(m_searchTimer->isActive() && m_searchParam == name_ && m_searchValue == value_) {

        return;

    }

    // we don't need to fire search timer if we already covered this string

    // in the previous successful search.

    if (m_searchParam == name_ && value_.startsWith(m_searchValue) && !m_searchTimer->isActive()) {

        for (int i=0; i<m_results.size(); ++i) {

            if (!m_results[i].startsWith(value_)) {

                m_results.remove(i--);

            }

        }

        m_searchValue = value_;

        updatePopupView();

        return;

    }

    // stop ongoing search

    stopSearch();

    m_searchParam = name_;

    m_searchValue = value_;

    m_searchTimer->startOneShot(kSearchStartTimeout);

}

void FormFillController::stopSearch()

{

    if(m_searchTimer->isActive())

        m_searchTimer->stop();

}

void FormFillController::insertInputNameAndValue(const String& name_, const String& value_)

{

    if (value_.isEmpty())

        return;

    if(!m_formDB)

        m_formDB = new FormDataStore(this);

    m_formDB->add(name_, value_);

}

void FormFillController::fillPasswordIfExists(HTMLInputElement* uNode)

{   

    HTMLFormElement* form = uNode->form();

    if (!m_passwdDB)

        m_passwdDB = new FormLoginStore();

    if (form) {

        int passwds = 0;

        HTMLInputElement* passwd = searchPasswordFields(form, uNode, passwds);

        if (passwds == 1) {

            // search if we have already stored the password

            String passwdValue;

            String realm = passwdRealm(uNode->document()->URL());

            if (!realm.isEmpty() && m_passwdDB->search(realm, uNode->name(), 

                                    uNode->value(), passwd->name(), passwdValue)) {

                passwd->setValue(passwdValue);

            }

        }

    }

}

void FormFillController::saveFormData(HTMLFormElement* form, MFormFillCallback* callback, bool passwdFillEnabled)

{

    // should delete the popup somewhere else, however, FepManger crashes

    // if we delete the popup while editing - weird

    if (m_popup) {

        delete m_popup;

        m_popup = NULL;

    }

    // form has "autocomplete=off"

    if (!form->autoComplete())

        return;

    bool onePasswdSaved = false;

    // step through elements and ignore input element with "autocomplete=off",

    for (unsigned i = 0; i < form->formElements.size(); ++i) {

        HTMLGenericFormElement* current = form->formElements[i];

        if (current->hasTagName(HTMLNames::inputTag)) {

            HTMLInputElement* input = static_cast<HTMLInputElement*>(current);

            if (input->inputType() == HTMLInputElement::TEXT) {

                if (input->autoComplete()) { 

                    bool ignorefield = false;    

                    // find the matching password and save login data

                    int passwdFields = 0;

                    HTMLInputElement* passwd = NULL;

                    if (passwdFillEnabled) 

                        passwd = searchPasswordFields(form, input, passwdFields);

                    String realm = passwdRealm(input->document()->URL());

                    if (passwdFields == 1) {

                        if (!m_passwdDB)

                            m_passwdDB = new FormLoginStore();

                        // we first check the black list, don't bother the user with

                        // queries if the realm is in black list

                        if (!m_passwdDB->saveAllowed(realm))

                            ignorefield = true;

                        // if login info is already saved, don't save again

                        if (!ignorefield && m_passwdDB->contains(realm, input->name(), input->value(), passwd->name(), passwd->value())) {

                            ignorefield = true;

                            onePasswdSaved = true;

                        }

                        // ask user if she want to save login info now, later or never.

                        bool saveNow = false, neverSave = false;

                        if (!ignorefield && !onePasswdSaved)

                            TRAP_IGNORE(callback->queryUserAboutAutoFillL(saveNow, neverSave));

                        if (saveNow) {

                            m_passwdDB->add(realm, input->name(), input->value(), passwd->name(), passwd->value());

                            m_passwdDB->commit();

                            onePasswdSaved = true;

                        } else if (neverSave) {

                            // if there is already login info associated with this realm, remove it.

                            m_passwdDB->removeLoginsForRealm(realm);

                            m_passwdDB->setSaveNotAllowed(realm);

                            m_passwdDB->commit();

                            ignorefield = true;

                        } else if (!ignorefield) {

                            // don't save this time, should delete previously-save 

                            m_passwdDB->removePartial(realm, input->name(), input->value(), passwd->name());

                            m_passwdDB->commit();

                        } 

                    }

                    else if (passwdFields > 1) {

                        // most likely this is a password change form, need to purge

                        // the saved login for this form.

                      if (m_passwdDB) {

                        m_passwdDB->remove(realm, input->name(), input->value(), passwd->name(), passwd->value());

                        m_passwdDB->commit();

                      }

                    }

                    if (!ignorefield)

                        insertInputNameAndValue(input->name(), input->value());

                }

            }

        }        

    }

}

HTMLInputElement* FormFillController::searchPasswordFields(HTMLFormElement* form, HTMLInputElement* uNode, int& passwds)

{

    // search the password field, we assume there is only one password field in

    // a form and it is adjacent to the username field. If the form has more than

    // one passwd field, we assume it is a password change form and will not save it.

    HTMLInputElement* passwd = NULL;

    int firstPasswdIdx = -1, usernameIdx = -1;

    // HTMLFormElement doesn't encapsulate formElements, weird!!!

    for (unsigned i = 0; i < form->formElements.size(); ++i) {

        HTMLGenericFormElement* current = form->formElements[i];

        if (current->hasTagName(HTMLNames::inputTag)) {

            HTMLInputElement* input = static_cast<HTMLInputElement*>(current);

            if (input == uNode) {

                usernameIdx = i;

                continue;

            }

            else if (usernameIdx != -1 && input->inputType() == HTMLInputElement::TEXT) {

                // current element is a text input element positioning between uNode and 

                // any possible successing password field.  So uNode can't be a

                // usename field.

                break;

            }

            else if (input->inputType() == HTMLInputElement::PASSWORD) {

                passwds++;

                if (firstPasswdIdx == -1) {

                    passwd = input;

                    firstPasswdIdx = i;

                }

                else {

                    break;

                }

            }

        }

    }

    return passwd;

}

String FormFillController::passwdRealm(const DeprecatedString& str)

{

    KURL url(str);

    String realm;

    if(!url.host().isEmpty()) {

        realm.append(url.protocol());

        realm.append("://");

        realm.append(url.host());

        realm.append(":");

        realm.append(DeprecatedString().setNum(url.port()));

    }

    return realm;

}

void FormFillController::clearFormData()

{

    stopSearch();

    if (!m_formDB)

        m_formDB = new FormDataStore(this);

    m_formDB->deleteAll();

    delete m_formDB;

    m_formDB = NULL;

}

void FormFillController::clearLoginData()

{

    if (!m_passwdDB)

        m_passwdDB = new FormLoginStore();

    m_passwdDB->deleteAll();

}

void FormFillController::destroyPopup()

{

    if (m_popup) {

        m_popup->clear();

        delete m_popup;

        m_popup = NULL;

    }

}

} // END OF FILE