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authorJocelyn Turcotte <jocelyn.turcotte@digia.com>2014-01-16 18:20:32 +0100
committerThe Qt Project <gerrit-noreply@qt-project.org>2014-04-15 17:03:28 +0200
commitbeb4ff332ca5b8406a75e8b2146464c5b0a81abd (patch)
treecb949f8710876153acaa146eda29abf89447a9f4 /src/webenginewidgets/doc/src/qwebenginesettings_lgpl.qdoc
parent84ced937a0f9f2874e32e16c4c6ebf72b46904c9 (diff)
Cleanup the QtWebEngineWidgets public headers and API
Headers were left intact to leave a trace of the evolution compared to the QtWebKit API and to make it easier to work until we had a basic subset of the API implemented. With the upcoming release, this patch removes this convenience in the aim of starting polishing the headers and the documentation for the upcoming release. Change-Id: Iae436b4ec041d771a7002575e122835802bc9f3e Reviewed-by: Michael Bruning <michael.bruning@digia.com>
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-/*
- Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
- 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.
-*/
-
-// The documentation in this file was imported from QtWebKit and is thus constrained
-// by its LGPL license. Documentation written from scratch for new methods should be
-// placed inline in the code as usual.
-
-/*!
- \class QWebEngineSettings
- \since 4.4
- \brief The QWebEngineSettings class provides an object to store the settings used
- by QWebEnginePage.
-
- \inmodule QtWebEngine
-
- Each QWebEnginePage object has its own QWebEngineSettings 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().
-
- QWebEngineSettings 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{QWebEngineSettings::WebAttribute}{WebAttribute} enum further describes
- each attribute.
-
- QWebEngineSettings 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{QWebEngineSettings::PluginsEnabled}{PluginsEnabled} attribute. For many applications,
- this attribute is enabled for all pages by setting it on the
- \l{globalSettings()}{global settings object}. Qt WebKit 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 QWebEnginePage::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 QWebEnginePage::settings(), QWebEngineView::settings(), {WebEngine Tab Browser Example}
-*/
-
-/*!
- \fn QWebEngineSettings* QWebEngineSettings::globalSettings()
- Returns the global settings object.
-
- Any setting changed on the default object is automatically applied to all
- QWebEnginePage instances where the particular setting is not overridden already.
-*/
-
-/*!
- \enum QWebEngineSettings::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 QWebEngineSettings::FontSize
-
- This enum describes the font sizes configurable through QWebEngineSettings.
-
- \value MinimumFontSize The hard minimum font size.
- \value MinimumLogicalFontSize The minimum logical font size that is applied
- when zooming out with QWebEnginePage::setTextSizeMultiplier().
- \value DefaultFontSize The default font size for regular text.
- \value DefaultFixedFontSize The default font size for fixed-pitch text.
-*/
-
-/*!
- \enum QWebEngineSettings::ThirdPartyCookiePolicy
-
- This enum describes the policies configurable for accepting and sending
- third-party cookies. These are cookies that are set or retrieved when fetching
- a resource that is stored for a different registry-controlled domain from the page containing it.
-
- \value AlwaysAllowThirdPartyCookies Allow third-party resources to set and retrieve cookies.
- \value AlwaysBlockThirdPartyCookies Never allow third-party resources to set and retrieve cookies.
- \value AllowThirdPartyWithExistingCookies If the cookie jar already contains cookies
- from a third-party, allow it to set and retrieve new and existing cookies.
-
- \since QtWebKit 2,3
-*/
-
-/*!
- \enum QWebEngineSettings::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 QWebEnginePage::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.
- \value InputSpeechButtonGraphic The graphic shown in input fields that support speech recognition.
- \value SearchCancelButtonGraphic The graphic shown for clearing the text in a search field.
- \value SearchCancelButtonPressedGraphic The graphic shown when SearchCancelButtonGraphic is pressed.
-*/
-
-/*!
- \enum QWebEngineSettings::WebAttribute
-
- This enum describes various attributes that are configurable through QWebEngineSettings.
-
- \value AutoLoadImages Specifies whether images are automatically loaded in
- web pages. This is enabled by default.
- \value DnsPrefetchEnabled Specifies whether Qt WebKit 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 JavascriptCanCloseWindows Specifies whether JavaScript programs
- can close 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 QWebEngineInspector 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.
- (This value was introduced in 4.6.)
- \value LocalStorageDatabaseEnabled \e{This enum value is deprecated.} Use
- QWebEngineSettings::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 QWebEngineSecurityOrigin.
- (This value was introduced in 4.6.)
- \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 QWebEngineSecurityOrigin.
- \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.
- \value CSSGridLayoutEnabled This setting enables support for the CSS 3 Grid Layout module. This
- CSS module is currently only a draft and support for it is disabled by default.
- \value ScrollAnimatorEnabled This setting enables animated scrolling. It is disabled by default.
- \value CaretBrowsingEnabled This setting enables caret browsing. It is disabled by default.
- \value NotificationsEnabled Specifies whether support for the HTML 5 web notifications is enabled
- or not. This is enabled by default.
-*/
-
-/*!
- \fn void QWebEngineSettings::setFontSize(FontSize type, int size)
- Sets the font size for \a type to \a size.
-*/
-
-/*!
- \fn int QWebEngineSettings::fontSize(FontSize type) const
- Returns the default font size for \a type.
-*/
-
-/*!
- \fn void QWebEngineSettings::resetFontSize(FontSize type)
- Resets the font size for \a type to the size specified in the global
- settings object.
-
- This function has no effect on the global QWebEngineSettings instance.
-*/
-
-/*!
- \fn void QWebEngineSettings::setUserStyleSheetUrl(const QUrl& location)
- Specifies the location of a user stylesheet to load with every web page.
-
- The \a location must be either a path on the local filesystem, or a data URL
- with UTF-8 and Base64 encoded data, such as:
-
- "data:text/css;charset=utf-8;base64,cCB7IGJhY2tncm91bmQtY29sb3I6IHJlZCB9Ow=="
-
- \note If the base64 data is not valid, the style will not be applied.
-
- \sa userStyleSheetUrl()
-*/
-
-/*!
- \fn QUrl QWebEngineSettings::userStyleSheetUrl() const
- Returns the location of the user stylesheet.
-
- \sa setUserStyleSheetUrl()
-*/
-
-/*!
- \fn void QWebEngineSettings::setDefaultTextEncoding(const QString& encoding)
- \since 4.6
- Specifies the default text encoding system.
-
- The \a encoding, must be a string describing an encoding such as "utf-8",
- "iso-8859-1", etc. If left empty a default value will be used. For a more
- extensive list of encoding names see \l{QTextCodec}
-
- \sa defaultTextEncoding()
-*/
-
-/*!
- \fn QString QWebEngineSettings::defaultTextEncoding() const
- \since 4.6
- Returns the default text encoding.
-
- \sa setDefaultTextEncoding()
-*/
-
-/*!
- \fn void QWebEngineSettings::setIconDatabasePath(const QString& path)
- Sets the path of the icon database to \a path. The icon database is used
- to store "favicons" associated with web sites.
-
- \a path must point to an existing directory.
-
- Setting an empty path disables the icon database.
-
- \sa iconDatabasePath(), clearIconDatabase()
-*/
-
-/*!
- \fn QString QWebEngineSettings::iconDatabasePath()
- Returns the path of the icon database or an empty string if the icon
- database is disabled.
-
- \sa setIconDatabasePath(), clearIconDatabase()
-*/
-
-/*!
- \fn void QWebEngineSettings::clearIconDatabase()
- Clears the icon database.
-*/
-
-/*!
- \fn QIcon QWebEngineSettings::iconForUrl(const QUrl& url)
- Returns the web site's icon for \a url.
-
- If the web site does not specify an icon \b OR if the icon is not in the
- database, a null QIcon is returned.
-
- \note The returned icon's size is arbitrary.
-
- \sa setIconDatabasePath()
-*/
-
-/*!
- \fn void QWebEngineSettings::setWebGraphic(WebGraphic type, const QPixmap& graphic)
- Sets \a graphic to be drawn when Qt WebKit needs to draw an image of the
- given \a type.
-
- For example, when an image cannot be loaded, the pixmap specified by
- \l{QWebEngineSettings::WebGraphic}{MissingImageGraphic} is drawn instead.
-
- \sa webGraphic()
-*/
-
-/*!
- \fn QPixmap QWebEngineSettings::webGraphic(WebGraphic type)
- Returns a previously set pixmap used to draw replacement graphics of the
- specified \a type.
-
- \sa setWebGraphic()
-*/
-
-/*!
- \fn void QWebEngineSettings::clearMemoryCaches()
- Frees up as much memory as possible by calling the JavaScript garbage collector and cleaning all memory caches such
- as page, object and font cache.
-
- \since 4.6
- */
-
-/*!
- \fn void QWebEngineSettings::setMaximumPagesInCache(int pages)
- Sets the maximum number of pages to hold in the memory page cache to \a pages.
-
- The Page Cache allows for a nicer user experience when navigating forth or back
- to pages in the forward/back history, by pausing and resuming up to \a pages.
-
- For more information about the feature, please refer to:
-
- http://webkit.org/blog/427/webkit-page-cache-i-the-basics/
-*/
-
-/*!
- \fn int QWebEngineSettings::maximumPagesInCache()
- Returns the maximum number of web pages that are kept in the memory cache.
-*/
-
-/*!
- \fn void QWebEngineSettings::setObjectCacheCapacities(int cacheMinDeadCapacity, int cacheMaxDead, int totalCapacity)
- Specifies the capacities for the memory cache for dead objects such as
- stylesheets or scripts.
-
- The \a cacheMinDeadCapacity specifies the \e minimum number of bytes that
- dead objects should consume when the cache is under pressure.
-
- \a cacheMaxDead is the \e maximum number of bytes that dead objects should
- consume when the cache is \b not under pressure.
-
- \a totalCapacity specifies the \e maximum number of bytes that the cache
- should consume \b overall.
-
- The cache is enabled by default. Calling setObjectCacheCapacities(0, 0, 0)
- will disable the cache. Calling it with one non-zero enables it again.
-*/
-
-/*!
- \fn void QWebEngineSettings::setThirdPartyCookiePolicy(ThirdPartyCookiePolicy policy)
- Sets the third-party cookie policy, the default is AlwaysAllowThirdPartyCookies.
-*/
-
-/*!
- \fn QWebEngineSettings::ThirdPartyCookiePolicy QWebEngineSettings::thirdPartyCookiePolicy() const
- Returns the third-party cookie policy.
-*/
-
-/*!
- \fn void QWebEngineSettings::setCSSMediaType(const QString& type)
- Sets the CSS media type to \a type.
-
- Setting this will override the normal value of the CSS media property.
-
- \note Setting the value to null QString will restore the default value.
-*/
-
-/*!
- \fn QString QWebEngineSettings::cssMediaType() const
- Returns the current CSS media type.
-
- \note It will only return the value set through setCSSMediaType and not the one used internally.
-*/
-
-/*!
- \fn void QWebEngineSettings::setFontFamily(FontFamily which, const QString& family)
- Sets the actual font family to \a family for the specified generic family,
- \a which.
-*/
-
-/*!
- \fn QString QWebEngineSettings::fontFamily(FontFamily which) const
- Returns the actual font family for the specified generic font family,
- \a which.
-*/
-
-/*!
- \fn void QWebEngineSettings::resetFontFamily(FontFamily which)
- Resets the actual font family specified by \a which to the one set
- in the global QWebEngineSettings instance.
-
- This function has no effect on the global QWebEngineSettings instance.
-*/
-
-/*!
- \fn void QWebEngineSettings::setAttribute(WebAttribute attribute, bool on)
-
- Enables or disables the specified \a attribute feature depending on the
- value of \a on.
-*/
-
-/*!
- \fn bool QWebEngineSettings::testAttribute(WebAttribute attribute) const
-
- Returns true if \a attribute is enabled; otherwise returns false.
-*/
-
-/*!
- \fn void QWebEngineSettings::resetAttribute(WebAttribute attribute)
-
- Resets the setting of \a attribute to the value specified in the
- global QWebEngineSettings instance.
-
- This function has no effect on the global QWebEngineSettings instance.
-
- \sa globalSettings()
-*/
-
-/*!
- \fn void QWebEngineSettings::setOfflineStoragePath(const QString& path)
- \since 4.5
-
- Sets \a path as the save location for HTML5 client-side database storage data.
-
- \a path must point to an existing directory.
-
- Setting an empty path disables the feature.
-
- Support for client-side databases can enabled by setting the
- \l{QWebEngineSettings::OfflineStorageDatabaseEnabled}{OfflineStorageDatabaseEnabled} attribute.
-
- \sa offlineStoragePath()
-*/
-
-/*!
- \fn QString QWebEngineSettings::offlineStoragePath()
- \since 4.5
-
- Returns the path of the HTML5 client-side database storage or an empty string if the
- feature is disabled.
-
- \sa setOfflineStoragePath()
-*/
-
-/*!
- \fn void QWebEngineSettings::setOfflineStorageDefaultQuota(qint64 maximumSize)
- \since 4.5
-
- Sets the value of the default quota for new offline storage databases
- to \a maximumSize.
-*/
-
-/*!
- \fn qint64 QWebEngineSettings::offlineStorageDefaultQuota()
- \since 4.5
-
- Returns the value of the default quota for new offline storage databases.
-*/
-
-/*!
- \fn void QWebEngineSettings::setOfflineWebApplicationCachePath(const QString& path)
- \since 4.6
-
- Sets the path for HTML5 offline web application cache storage to \a path.
-
- An application cache acts like an HTTP cache in some sense. For documents
- that use the application cache via JavaScript, the loader engine will
- first ask the application cache for the contents, before hitting the
- network.
-
- The feature is described in details at:
- http://dev.w3.org/html5/spec/Overview.html#appcache
-
- \a path must point to an existing directory.
-
- Setting an empty path disables the feature.
-
- Support for offline web application cache storage can enabled by setting the
- \l{QWebEngineSettings::OfflineWebApplicationCacheEnabled}{OfflineWebApplicationCacheEnabled} attribute.
-
- \sa offlineWebApplicationCachePath()
-*/
-
-/*!
- \fn QString QWebEngineSettings::offlineWebApplicationCachePath()
- \since 4.6
-
- Returns the path of the HTML5 offline web application cache storage
- or an empty string if the feature is disabled.
-
- \sa setOfflineWebApplicationCachePath()
-*/
-
-/*!
- \fn void QWebEngineSettings::setOfflineWebApplicationCacheQuota(qint64 maximumSize)
- \since 4.6
-
- Sets the value of the quota for the offline web application cache
- to \a maximumSize.
-*/
-
-/*!
- \fn qint64 QWebEngineSettings::offlineWebApplicationCacheQuota()
- \since 4.6
-
- Returns the value of the quota for the offline web application cache.
-*/
-
-/*!
- \fn void QWebEngineSettings::setLocalStoragePath(const QString& path)
- \since 4.6
-
- Sets the path for HTML5 local storage to \a path.
-
- For more information on HTML5 local storage see the
- \l{http://www.w3.org/TR/webstorage/#the-localstorage-attribute}{Web Storage standard}.
-
- Support for local storage can enabled by setting the
- \l{QWebEngineSettings::LocalStorageEnabled}{LocalStorageEnabled} attribute.
-
- \sa localStoragePath()
-*/
-
-/*!
- \fn QString QWebEngineSettings::localStoragePath() const
- \since 4.6
-
- Returns the path for HTML5 local storage.
-
- \sa setLocalStoragePath()
-*/
-
-/*!
- \fn void QWebEngineSettings::enablePersistentStorage(const QString& path)
- \since 4.6
-
- Enables WebKit data persistence and sets the path to \a path.
- If \a path is empty, the user-specific data location specified by
- \l{QDesktopServices::DataLocation}{DataLocation} will be used instead.
-
- This method will simultaneously set and enable the iconDatabasePath(),
- localStoragePath(), offlineStoragePath() and offlineWebApplicationCachePath().
-
- \sa localStoragePath()
-*/