/*

    Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)

    This library is free software; you can redistribute it and/or

    modify it under the terms of the GNU Library General Public

    License as published by the Free Software Foundation; either

    version 2 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,

    but WITHOUT ANY WARRANTY; without even the implied warranty of

    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public License

    along with this library; see the file COPYING.LIB.  If not, write to

    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,

    Boston, MA 02110-1301, USA.

*/

#include "config.h"

#include "qwebsettings.h"

#include "qwebpage.h"

#include "qwebpage_p.h"

#include "qwebplugindatabase_p.h"

#include "AbstractDatabase.h"

#include "Cache.h"

#include "CrossOriginPreflightResultCache.h"

#include "FontCache.h"

#include "Page.h"

#include "PageCache.h"

#include "Settings.h"

#include "KURL.h"

#include "PlatformString.h"

#include "IconDatabase.h"

#include "Image.h"

#include "IntSize.h"

#include "ApplicationCacheStorage.h"

#include "DatabaseTracker.h"

#include "FileSystem.h"

#include <QApplication>

#include <QDesktopServices>

#include <QDir>

#include <QHash>

#include <QSharedData>

#include <QUrl>

#include <QFileInfo>

#include "NetworkStateNotifier.h"

void QWEBKIT_EXPORT qt_networkAccessAllowed(bool isAllowed)

{

#if ENABLE(QT_BEARER)

    WebCore::networkStateNotifier().setNetworkAccessAllowed(isAllowed);

#endif

}

class QWebSettingsPrivate {

public:

    QWebSettingsPrivate(WebCore::Settings* wcSettings = 0)

        : settings(wcSettings)

    {

    }

    QHash<int, QString> fontFamilies;

    QHash<int, int> fontSizes;

    QHash<int, bool> attributes;

    QUrl userStyleSheetLocation;

    QString defaultTextEncoding;

    QString localStoragePath;

    QString offlineWebApplicationCachePath;

    qint64 offlineStorageDefaultQuota;

    void apply();

    WebCore::Settings* settings;

};

typedef QHash<int, QPixmap> WebGraphicHash;

Q_GLOBAL_STATIC(WebGraphicHash, _graphics)

static void earlyClearGraphics()

{

    _graphics()->clear();

}

static WebGraphicHash* graphics()

{

    WebGraphicHash* hash = _graphics();

    if (hash->isEmpty()) {

        // prevent ~QPixmap running after ~QApplication (leaks native pixmaps)

        qAddPostRoutine(earlyClearGraphics);

        hash->insert(QWebSettings::MissingImageGraphic, QPixmap(QLatin1String(":webkit/resources/missingImage.png")));

        hash->insert(QWebSettings::MissingPluginGraphic, QPixmap(QLatin1String(":webkit/resources/nullPlugin.png")));

        hash->insert(QWebSettings::DefaultFrameIconGraphic, QPixmap(QLatin1String(":webkit/resources/urlIcon.png")));

        hash->insert(QWebSettings::TextAreaSizeGripCornerGraphic, QPixmap(QLatin1String(":webkit/resources/textAreaResizeCorner.png")));

        hash->insert(QWebSettings::DeleteButtonGraphic, QPixmap(QLatin1String(":webkit/resources/deleteButton.png")));

        hash->insert(QWebSettings::InputSpeechButtonGraphic, QPixmap(QLatin1String(":webkit/resources/inputSpeech.png")));

    }

    return hash;

}

Q_GLOBAL_STATIC(QList<QWebSettingsPrivate*>, allSettings);

void QWebSettingsPrivate::apply()

{

    if (settings) {

        settings->setTextAreasAreResizable(true);

        QWebSettingsPrivate* global = QWebSettings::globalSettings()->d;

        QString family = fontFamilies.value(QWebSettings::StandardFont,

                                            global->fontFamilies.value(QWebSettings::StandardFont));

        settings->setStandardFontFamily(family);

        family = fontFamilies.value(QWebSettings::FixedFont,

                                    global->fontFamilies.value(QWebSettings::FixedFont));

        settings->setFixedFontFamily(family);

        family = fontFamilies.value(QWebSettings::SerifFont,

                                    global->fontFamilies.value(QWebSettings::SerifFont));

        settings->setSerifFontFamily(family);

        family = fontFamilies.value(QWebSettings::SansSerifFont,

                                    global->fontFamilies.value(QWebSettings::SansSerifFont));

        settings->setSansSerifFontFamily(family);

        family = fontFamilies.value(QWebSettings::CursiveFont,

                                    global->fontFamilies.value(QWebSettings::CursiveFont));

        settings->setCursiveFontFamily(family);

        family = fontFamilies.value(QWebSettings::FantasyFont,

                                    global->fontFamilies.value(QWebSettings::FantasyFont));

        settings->setFantasyFontFamily(family);

        int size = fontSizes.value(QWebSettings::MinimumFontSize,

                                   global->fontSizes.value(QWebSettings::MinimumFontSize));

        settings->setMinimumFontSize(size);

        size = fontSizes.value(QWebSettings::MinimumLogicalFontSize,

                                   global->fontSizes.value(QWebSettings::MinimumLogicalFontSize));

        settings->setMinimumLogicalFontSize(size);

        size = fontSizes.value(QWebSettings::DefaultFontSize,

                                   global->fontSizes.value(QWebSettings::DefaultFontSize));

        settings->setDefaultFontSize(size);

        size = fontSizes.value(QWebSettings::DefaultFixedFontSize,

                                   global->fontSizes.value(QWebSettings::DefaultFixedFontSize));

        settings->setDefaultFixedFontSize(size);

        bool value = attributes.value(QWebSettings::AutoLoadImages,

                                      global->attributes.value(QWebSettings::AutoLoadImages));

        settings->setLoadsImagesAutomatically(value);

        value = attributes.value(QWebSettings::JavascriptEnabled,

                                      global->attributes.value(QWebSettings::JavascriptEnabled));

        settings->setJavaScriptEnabled(value);

#if USE(ACCELERATED_COMPOSITING)

        value = attributes.value(QWebSettings::AcceleratedCompositingEnabled,

                                      global->attributes.value(QWebSettings::AcceleratedCompositingEnabled));

        settings->setAcceleratedCompositingEnabled(value);

#endif

#if ENABLE(3D_CANVAS)

        value = attributes.value(QWebSettings::WebGLEnabled,

                                 global->attributes.value(QWebSettings::WebGLEnabled));

        settings->setWebGLEnabled(value);

#endif

        value = attributes.value(QWebSettings::JavascriptCanOpenWindows,

                                      global->attributes.value(QWebSettings::JavascriptCanOpenWindows));

        settings->setJavaScriptCanOpenWindowsAutomatically(value);

        value = attributes.value(QWebSettings::JavaEnabled,

                                      global->attributes.value(QWebSettings::JavaEnabled));

        settings->setJavaEnabled(value);

        value = attributes.value(QWebSettings::PluginsEnabled,

                                      global->attributes.value(QWebSettings::PluginsEnabled));

        settings->setPluginsEnabled(value);

        value = attributes.value(QWebSettings::PrivateBrowsingEnabled,

                                      global->attributes.value(QWebSettings::PrivateBrowsingEnabled));

        settings->setPrivateBrowsingEnabled(value);

        value = attributes.value(QWebSettings::SpatialNavigationEnabled,

                                      global->attributes.value(QWebSettings::SpatialNavigationEnabled));

        settings->setSpatialNavigationEnabled(value);

        value = attributes.value(QWebSettings::JavascriptCanAccessClipboard,

                                      global->attributes.value(QWebSettings::JavascriptCanAccessClipboard));

        settings->setDOMPasteAllowed(value);

        settings->setJavaScriptCanAccessClipboard(value);

        value = attributes.value(QWebSettings::DeveloperExtrasEnabled,

                                      global->attributes.value(QWebSettings::DeveloperExtrasEnabled));

        settings->setDeveloperExtrasEnabled(value);

        value = attributes.value(QWebSettings::FrameFlatteningEnabled,

                                      global->attributes.value(QWebSettings::FrameFlatteningEnabled));

        settings->setFrameFlatteningEnabled(value);

        QUrl location = !userStyleSheetLocation.isEmpty() ? userStyleSheetLocation : global->userStyleSheetLocation;

        settings->setUserStyleSheetLocation(WebCore::KURL(location));

        QString encoding = !defaultTextEncoding.isEmpty() ? defaultTextEncoding: global->defaultTextEncoding;

        settings->setDefaultTextEncodingName(encoding);

        QString storagePath = !localStoragePath.isEmpty() ? localStoragePath : global->localStoragePath;

        settings->setLocalStorageDatabasePath(storagePath);

        value = attributes.value(QWebSettings::ZoomTextOnly,

                                 global->attributes.value(QWebSettings::ZoomTextOnly));

        settings->setZoomMode(value ? WebCore::ZoomTextOnly : WebCore::ZoomPage);

        value = attributes.value(QWebSettings::PrintElementBackgrounds,

                                      global->attributes.value(QWebSettings::PrintElementBackgrounds));

        settings->setShouldPrintBackgrounds(value);

#if ENABLE(DATABASE)

        value = attributes.value(QWebSettings::OfflineStorageDatabaseEnabled,

                                      global->attributes.value(QWebSettings::OfflineStorageDatabaseEnabled));

        WebCore::AbstractDatabase::setIsAvailable(value);

#endif

        value = attributes.value(QWebSettings::OfflineWebApplicationCacheEnabled,

                                      global->attributes.value(QWebSettings::OfflineWebApplicationCacheEnabled));

        settings->setOfflineWebApplicationCacheEnabled(value);

        value = attributes.value(QWebSettings::LocalStorageEnabled,

                                      global->attributes.value(QWebSettings::LocalStorageEnabled));

        settings->setLocalStorageEnabled(value);

        value = attributes.value(QWebSettings::LocalContentCanAccessRemoteUrls,

                                      global->attributes.value(QWebSettings::LocalContentCanAccessRemoteUrls));

        settings->setAllowUniversalAccessFromFileURLs(value);

        value = attributes.value(QWebSettings::LocalContentCanAccessFileUrls,

                                      global->attributes.value(QWebSettings::LocalContentCanAccessFileUrls));

        settings->setAllowFileAccessFromFileURLs(value);

        value = attributes.value(QWebSettings::XSSAuditingEnabled,

                                      global->attributes.value(QWebSettings::XSSAuditingEnabled));

        settings->setXSSAuditorEnabled(value);

#if ENABLE(TILED_BACKING_STORE)

        value = attributes.value(QWebSettings::TiledBackingStoreEnabled,

                                      global->attributes.value(QWebSettings::TiledBackingStoreEnabled));

        settings->setTiledBackingStoreEnabled(value);

#endif

        value = attributes.value(QWebSettings::SiteSpecificQuirksEnabled,

                                      global->attributes.value(QWebSettings::SiteSpecificQuirksEnabled));

        settings->setNeedsSiteSpecificQuirks(value);

        settings->setUsesPageCache(WebCore::pageCache()->capacity());

    } else {

        QList<QWebSettingsPrivate*> settings = *::allSettings();

        for (int i = 0; i < settings.count(); ++i)

            settings[i]->apply();

    }

}

/*!

    Returns the global settings object.

    Any setting changed on the default object is automatically applied to all

    QWebPage instances where the particular setting is not overriden already.

*/

QWebSettings* QWebSettings::globalSettings()

{

    static QWebSettings* global = 0;

    if (!global)

        global = new QWebSettings;

    return global;

}

/*!

    \class QWebSettings

    \since 4.4

    \brief The QWebSettings class provides an object to store the settings used

    by QWebPage and QWebFrame.

    \inmodule QtWebKit

    Each QWebPage object has its own QWebSettings object, which configures the

    settings for that page. If a setting is not configured, then it is looked

    up in the global settings object, which can be accessed using

    globalSettings().

    QWebSettings allows configuration of browser properties, such as font sizes and

    families, the location of a custom style sheet, and generic attributes like

    JavaScript and plugins. Individual attributes are set using the setAttribute()

    function. The \l{QWebSettings::WebAttribute}{WebAttribute} enum further describes

    each attribute.

    QWebSettings also configures global properties such as the web page memory

    cache, icon database, local database storage and offline

    applications storage.

    \section1 Enabling Plugins

    Support for browser plugins can enabled by setting the

    \l{QWebSettings::PluginsEnabled}{PluginsEnabled} attribute. For many applications,

    this attribute is enabled for all pages by setting it on the

    \l{globalSettings()}{global settings object}. QtWebKit will always ignore this setting

    when processing Qt plugins. The decision to allow a Qt plugin is made by the client

    in its reimplementation of QWebPage::createPlugin().

    \section1 Web Application Support

    WebKit provides support for features specified in \l{HTML 5} that improve the

    performance and capabilities of Web applications. These include client-side

    (offline) storage and the use of a Web application cache.

    Client-side (offline) storage is an improvement over the use of cookies to

    store persistent data in Web applications. Applications can configure and

    enable the use of an offline storage database by calling the

    setOfflineStoragePath() with an appropriate file path, and can limit the quota

    for each application by calling setOfflineStorageDefaultQuota().

    \sa QWebPage::settings(), QWebView::settings(), {Web Browser}

*/

/*!

    \enum QWebSettings::FontFamily

    This enum describes the generic font families defined by CSS 2.

    For more information see the

    \l{http://www.w3.org/TR/REC-CSS2/fonts.html#generic-font-families}{CSS standard}.

    \value StandardFont

    \value FixedFont

    \value SerifFont

    \value SansSerifFont

    \value CursiveFont

    \value FantasyFont

*/

/*!

    \enum QWebSettings::FontSize

    This enum describes the font sizes configurable through QWebSettings.

    \value MinimumFontSize The hard minimum font size.

    \value MinimumLogicalFontSize The minimum logical font size that is applied

        when zooming out with QWebFrame::setTextSizeMultiplier().

    \value DefaultFontSize The default font size for regular text.

    \value DefaultFixedFontSize The default font size for fixed-pitch text.

*/

/*!

    \enum QWebSettings::WebGraphic

    This enums describes the standard graphical elements used in webpages.

    \value MissingImageGraphic The replacement graphic shown when an image could not be loaded.

    \value MissingPluginGraphic The replacement graphic shown when a plugin could not be loaded.

    \value DefaultFrameIconGraphic The default icon for QWebFrame::icon().

    \value TextAreaSizeGripCornerGraphic The graphic shown for the size grip of text areas.

    \value DeleteButtonGraphic The graphic shown for the WebKit-Editing-Delete-Button in Deletion UI.

*/

/*!

    \enum QWebSettings::WebAttribute

    This enum describes various attributes that are configurable through QWebSettings.

    \value AutoLoadImages Specifies whether images are automatically loaded in

        web pages. This is enabled by default.

    \value DnsPrefetchEnabled Specifies whether QtWebkit will try to pre-fetch DNS entries to

        speed up browsing. This only works as a global attribute. Only for Qt 4.6 and later. This is disabled by default.

    \value JavascriptEnabled Enables or disables the running of JavaScript

        programs. This is enabled by default

    \value JavaEnabled Enables or disables Java applets.

        Currently Java applets are not supported.

    \value PluginsEnabled Enables or disables plugins in Web pages (e.g. using NPAPI). Qt plugins

        with a mimetype such as "application/x-qt-plugin" are not affected by this setting. This is disabled by default.

    \value PrivateBrowsingEnabled Private browsing prevents WebKit from

        recording visited pages in the history and storing web page icons. This is disabled by default.

    \value JavascriptCanOpenWindows Specifies whether JavaScript programs

        can open new windows. This is disabled by default.

    \value JavascriptCanAccessClipboard Specifies whether JavaScript programs

        can read or write to the clipboard. This is disabled by default.

    \value DeveloperExtrasEnabled Enables extra tools for Web developers.

        Currently this enables the "Inspect" element in the context menu as

        well as the use of QWebInspector which controls the web inspector

        for web site debugging. This is disabled by default.

    \value SpatialNavigationEnabled Enables or disables the Spatial Navigation

        feature, which consists in the ability to navigate between focusable

        elements in a Web page, such as hyperlinks and form controls, by using

        Left, Right, Up and Down arrow keys. For example, if a user presses the

        Right key, heuristics determine whether there is an element he might be

        trying to reach towards the right and which element he probably wants.

        This is disabled by default.

    \value LinksIncludedInFocusChain Specifies whether hyperlinks should be

        included in the keyboard focus chain. This is enabled by default.

    \value ZoomTextOnly Specifies whether the zoom factor on a frame applies

        only to the text or to all content. This is disabled by default.

    \value PrintElementBackgrounds Specifies whether the background color and images

        are also drawn when the page is printed. This is enabled by default.

    \value OfflineStorageDatabaseEnabled Specifies whether support for the HTML 5

        offline storage feature is enabled or not. This is disabled by default.

    \value OfflineWebApplicationCacheEnabled Specifies whether support for the HTML 5

        web application cache feature is enabled or not. This is disabled by default.

    \value LocalStorageEnabled Specifies whether support for the HTML 5

        local storage feature is enabled or not. This is disabled by default.

    \value LocalStorageDatabaseEnabled \e{This enum value is deprecated.} Use

        QWebSettings::LocalStorageEnabled instead.

    \value LocalContentCanAccessRemoteUrls Specifies whether locally loaded documents are

        allowed to access remote urls. This is disabled by default. For more information

        about security origins and local vs. remote content see QWebSecurityOrigin.

    \value LocalContentCanAccessFileUrls Specifies whether locally loaded documents are

        allowed to access other local urls. This is enabled by default. For more information

        about security origins and local vs. remote content see QWebSecurityOrigin.

    \value XSSAuditingEnabled Specifies whether load requests should be monitored for cross-site

        scripting attempts. Suspicious scripts will be blocked and reported in the inspector's

        JavaScript console. Enabling this feature might have an impact on performance

        and it is disabled by default.

    \value AcceleratedCompositingEnabled This feature, when used in conjunction with

        QGraphicsWebView, accelerates animations of web content. CSS animations of the transform and

        opacity properties will be rendered by composing the cached content of the animated elements.

        This is enabled by default.

    \value TiledBackingStoreEnabled This setting enables the tiled backing store feature

        for a QGraphicsWebView. With the tiled backing store enabled, the web page contents in and around

        the current visible area is speculatively cached to bitmap tiles. The tiles are automatically kept

        in sync with the web page as it changes. Enabling tiling can significantly speed up painting heavy 

        operations like scrolling. Enabling the feature increases memory consumption. It does not work well 

        with contents using CSS fixed positioning (see also \l{QGraphicsWebView::}{resizesToContents} property).

        \l{QGraphicsWebView::}{tiledBackingStoreFrozen} property allows application to temporarily

        freeze the contents of the backing store. This is disabled by default.

    \value FrameFlatteningEnabled With this setting each subframe is expanded to its contents.

        On touch devices, it is desired to not have any scrollable sub parts of the page

        as it results in a confusing user experience, with scrolling sometimes scrolling sub parts

        and at other times scrolling the page itself. For this reason iframes and framesets are

        barely usable on touch devices. This will flatten all the frames to become one scrollable page.

        This is disabled by default.

    \value SiteSpecificQuirksEnabled This setting enables WebKit's workaround for broken sites. It is

        enabled by default.

*/

/*!

    \internal

*/

QWebSettings::QWebSettings()

    : d(new QWebSettingsPrivate)

{

    // Initialize our global defaults

    d->fontSizes.insert(QWebSettings::MinimumFontSize, 0);

    d->fontSizes.insert(QWebSettings::MinimumLogicalFontSize, 0);

    d->fontSizes.insert(QWebSettings::DefaultFontSize, 16);

    d->fontSizes.insert(QWebSettings::DefaultFixedFontSize, 13);

    d->attributes.insert(QWebSettings::AutoLoadImages, true);

    d->attributes.insert(QWebSettings::DnsPrefetchEnabled, false);

    d->attributes.insert(QWebSettings::JavascriptEnabled, true);

    d->attributes.insert(QWebSettings::SpatialNavigationEnabled, false);

    d->attributes.insert(QWebSettings::LinksIncludedInFocusChain, true);

    d->attributes.insert(QWebSettings::ZoomTextOnly, false);

    d->attributes.insert(QWebSettings::PrintElementBackgrounds, true);

    d->attributes.insert(QWebSettings::OfflineStorageDatabaseEnabled, false);

    d->attributes.insert(QWebSettings::OfflineWebApplicationCacheEnabled, false);

    d->attributes.insert(QWebSettings::LocalStorageEnabled, false);

    d->attributes.insert(QWebSettings::LocalContentCanAccessRemoteUrls, false);

    d->attributes.insert(QWebSettings::LocalContentCanAccessFileUrls, true);

    d->attributes.insert(QWebSettings::AcceleratedCompositingEnabled, true);

    d->attributes.insert(QWebSettings::WebGLEnabled, false);

    d->attributes.insert(QWebSettings::TiledBackingStoreEnabled, false);

    d->attributes.insert(QWebSettings::FrameFlatteningEnabled, false);

    d->attributes.insert(QWebSettings::SiteSpecificQuirksEnabled, true);

    d->offlineStorageDefaultQuota = 5 * 1024 * 1024;

    d->defaultTextEncoding = QLatin1String("iso-8859-1");

}

/*!

    \internal

*/

QWebSettings::QWebSettings(WebCore::Settings* settings)

    : d(new QWebSettingsPrivate(settings))

{

    d->settings = settings;

    d->apply();

    allSettings()->append(d);

}

/*!

    \internal

*/

QWebSettings::~QWebSettings()

{

    if (d->settings)

        allSettings()->removeAll(d);