/*
 * Copyright (C) 2003, 2004, 2005, 2012 Apple Computer, Inc.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1.  Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer. 
 * 2.  Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution. 
 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
 *     its contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission. 
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#import <Foundation/Foundation.h>

/*!
@enum WebCacheModel

@abstract Specifies a usage model for a WebView, which WebKit will use to 
determine its caching behavior.

@constant WebCacheModelDocumentViewer Appropriate for a WebView displaying 
a fixed document -- like a splash screen, a chat document, or a word processing 
document -- with no UI for navigation. The WebView will behave like any other 
view, releasing resources when they are no longer referenced. Remote resources, 
if any, will be cached to disk. This is the most memory-efficient setting.

Examples: iChat, Mail, TextMate, Growl.

@constant WebCacheModelDocumentBrowser Appropriate for a WebView displaying 
a browsable series of documents with a UI for navigating between them -- for 
example, a reference materials browser or a website designer. The WebView will 
cache a reasonable number of resources and previously viewed documents in 
memory and/or on disk.

Examples: Dictionary, Help Viewer, Coda.

@constant WebCacheModelPrimaryWebBrowser Appropriate for a WebView in the 
application that acts as the user's primary web browser. The WebView will cache
a very large number of resources and previously viewed documents in memory 
and/or on disk.

Examples: Safari, OmniWeb, Shiira.
*/
enum {
    WebCacheModelDocumentViewer = 0,
    WebCacheModelDocumentBrowser = 1,
    WebCacheModelPrimaryWebBrowser = 2
};
typedef NSUInteger WebCacheModel;

typedef struct WebPreferencesPrivate WebPreferencesPrivate;

extern NSString *WebPreferencesChangedNotification;

/*!
    @class WebPreferences
*/
@interface WebPreferences: NSObject <NSCoding>
{
@private
    WebPreferencesPrivate *_private;
}

/*!
    @method standardPreferences
*/
+ (WebPreferences *)standardPreferences;

/*!
    @method initWithIdentifier:
    @param anIdentifier A string used to identify the WebPreferences.
    @discussion WebViews can share instances of WebPreferences by using an instance of WebPreferences with
    the same identifier.  Typically, instance are not created directly.  Instead you set the preferences
    identifier on a WebView.  The identifier is used as a prefix that is added to the user defaults keys
    for the WebPreferences.
    @result Returns a new instance of WebPreferences or a previously allocated instance with the same identifier.
*/
- (id)initWithIdentifier:(NSString *)anIdentifier;

/*!
    @method identifier
    @result Returns the identifier for this WebPreferences.
*/
- (NSString *)identifier;

/*!
    @method standardFontFamily
*/
- (NSString *)standardFontFamily;

/*!
    @method setStandardFontFamily:
    @param family
*/
- (void)setStandardFontFamily:(NSString *)family;

/*!
    @method fixedFontFamily
*/
- (NSString *)fixedFontFamily;

/*!
    @method setFixedFontFamily:
    @param family
*/
- (void)setFixedFontFamily:(NSString *)family;

/*!
    @method serifFontFamily
*/
- (NSString *)serifFontFamily;

/*!
    @method setSerifFontFamily:
    @param family
*/
- (void)setSerifFontFamily:(NSString *)family;

/*!
    @method sansSerifFontFamily
*/
- (NSString *)sansSerifFontFamily;

/*!
    @method setSansSerifFontFamily:
    @param family
*/
- (void)setSansSerifFontFamily:(NSString *)family;

/*!
    @method cursiveFontFamily
*/
- (NSString *)cursiveFontFamily;

/*!
    @method setCursiveFontFamily:
    @param family
*/
- (void)setCursiveFontFamily:(NSString *)family;

/*!
    @method fantasyFontFamily
*/
- (NSString *)fantasyFontFamily;

/*!
    @method setFantasyFontFamily:
    @param family
*/
- (void)setFantasyFontFamily:(NSString *)family;

/*!
    @method defaultFontSize
*/
- (int)defaultFontSize;

/*!
    @method setDefaultFontSize:
    @param size
*/
- (void)setDefaultFontSize:(int)size;

/*!
    @method defaultFixedFontSize
*/
- (int)defaultFixedFontSize;

/*!
    @method setDefaultFixedFontSize:
    @param size
*/
- (void)setDefaultFixedFontSize:(int)size;

/*!
    @method minimumFontSize
*/
- (int)minimumFontSize;

/*!
    @method setMinimumFontSize:
    @param size
*/
- (void)setMinimumFontSize:(int)size;

/*!
    @method minimumLogicalFontSize
*/
- (int)minimumLogicalFontSize;

/*!
    @method setMinimumLogicalFontSize:
    @param size
*/
- (void)setMinimumLogicalFontSize:(int)size;

/*!
    @method defaultTextEncodingName
*/
- (NSString *)defaultTextEncodingName;

/*!
    @method setDefaultTextEncodingName:
    @param encoding
*/
- (void)setDefaultTextEncodingName:(NSString *)encoding;

/*!
    @method userStyleSheetEnabled
*/
- (BOOL)userStyleSheetEnabled;

/*!
    @method setUserStyleSheetEnabled:
    @param flag
*/
- (void)setUserStyleSheetEnabled:(BOOL)flag;

/*!
    @method userStyleSheetLocation
    @discussion The location of the user style sheet.
*/
- (NSURL *)userStyleSheetLocation;

/*!
    @method setUserStyleSheetLocation:
    @param URL The location of the user style sheet.
*/
- (void)setUserStyleSheetLocation:(NSURL *)URL;

/*!
    @method isJavaEnabled
*/
- (BOOL)isJavaEnabled;

/*!
    @method setJavaEnabled:
    @param flag
*/
- (void)setJavaEnabled:(BOOL)flag;

/*!
    @method isJavaScriptEnabled
*/
- (BOOL)isJavaScriptEnabled;

/*!
    @method setJavaScriptEnabled:
    @param flag
*/
- (void)setJavaScriptEnabled:(BOOL)flag;

/*!
    @method JavaScriptCanOpenWindowsAutomatically
*/
- (BOOL)javaScriptCanOpenWindowsAutomatically;

/*!
    @method setJavaScriptCanOpenWindowsAutomatically:
    @param flag
*/
- (void)setJavaScriptCanOpenWindowsAutomatically:(BOOL)flag;

/*!
    @method arePlugInsEnabled
*/
- (BOOL)arePlugInsEnabled;

/*!
    @method setPlugInsEnabled:
    @param flag
*/
- (void)setPlugInsEnabled:(BOOL)flag;

/*!
    @method allowAnimatedImages
*/
- (BOOL)allowsAnimatedImages;

/*!
    @method setAllowAnimatedImages:
    @param flag
*/
- (void)setAllowsAnimatedImages:(BOOL)flag;

/*!
    @method allowAnimatedImageLooping
*/
- (BOOL)allowsAnimatedImageLooping;

/*!
    @method setAllowAnimatedImageLooping:
    @param flag
*/
- (void)setAllowsAnimatedImageLooping: (BOOL)flag;

/*!
    @method setWillLoadImagesAutomatically:
    @param flag
*/
- (void)setLoadsImagesAutomatically: (BOOL)flag;

/*!
    @method willLoadImagesAutomatically
*/
- (BOOL)loadsImagesAutomatically;

/*!
    @method setAutosaves:
    @param flag 
    @discussion If autosave preferences is YES the settings represented by
    WebPreferences will be stored in the user defaults database.
*/
- (void)setAutosaves:(BOOL)flag;

/*!
    @method autosaves
    @result The value of the autosave preferences flag.
*/
- (BOOL)autosaves;

/*!
    @method setShouldPrintBackgrounds:
    @param flag
*/
- (void)setShouldPrintBackgrounds:(BOOL)flag;

/*!
    @method shouldPrintBackgrounds
    @result The value of the shouldPrintBackgrounds preferences flag
*/
- (BOOL)shouldPrintBackgrounds;

/*!
    @method setPrivateBrowsingEnabled:
    @param flag 
    @abstract If private browsing is enabled, WebKit will not store information
    about sites the user visits.
 */
- (void)setPrivateBrowsingEnabled:(BOOL)flag;

/*!
    @method privateBrowsingEnabled
 */
- (BOOL)privateBrowsingEnabled;

/*!
    @method setTabsToLinks:
    @param flag 
    @abstract If tabsToLinks is YES, the tab key will focus links and form controls. 
    The option key temporarily reverses this preference.
*/
- (void)setTabsToLinks:(BOOL)flag;

/*!
    @method tabsToLinks
*/
- (BOOL)tabsToLinks;

/*!
    @method setUsesPageCache:
    @abstract Sets whether the receiver's associated WebViews use the shared 
    page cache.
    @param UsesPageCache Whether the receiver's associated WebViews use the 
    shared page cache.
    @discussion Pages are cached as they are added to a WebBackForwardList, and
    removed from the cache as they are removed from a WebBackForwardList. Because 
    the page cache is global, caching a page in one WebBackForwardList may cause
    a page in another WebBackForwardList to be evicted from the cache.
*/
- (void)setUsesPageCache:(BOOL)usesPageCache;

/*!
    @method usesPageCache
    @abstract Returns whether the receiver should use the shared page cache.
    @result Whether the receiver should use the shared page cache.
    @discussion Pages are cached as they are added to a WebBackForwardList, and
    removed from the cache as they are removed from a WebBackForwardList. Because 
    the page cache is global, caching a page in one WebBackForwardList may cause
    a page in another WebBackForwardList to be evicted from the cache.
*/
- (BOOL)usesPageCache;

/*!
@method setCacheModel:

@abstract Specifies a usage model for a WebView, which WebKit will use to 
determine its caching behavior.

@param cacheModel The WebView's usage model for WebKit. If necessary, WebKit 
will prune its caches to match cacheModel.

@discussion Research indicates that users tend to browse within clusters of 
documents that hold resources in common, and to revisit previously visited 
documents. WebKit and the frameworks below it include built-in caches that take 
advantage of these patterns, substantially improving document load speed in 
browsing situations. The WebKit cache model controls the behaviors of all of 
these caches, including NSURLCache and the various WebCore caches.

Applications with a browsing interface can improve document load speed 
substantially by specifying WebCacheModelDocumentBrowser. Applications without 
a browsing interface can reduce memory usage substantially by specifying 
WebCacheModelDocumentViewer.

If setCacheModel: is not called, WebKit will select a cache model automatically.
*/
- (void)setCacheModel:(WebCacheModel)cacheModel;

/*!
@method cacheModel:

@abstract Returns the usage model according to which WebKit determines its 
caching behavior.

@result The usage model.
*/
- (WebCacheModel)cacheModel;

/*!
    @method setSuppressesIncrementalRendering:
    @param suppressesIncrementalRendering YES to suppress incremental rendering;
    NO otherwise.
*/
- (void)setSuppressesIncrementalRendering:(BOOL)suppressesIncrementalRendering;

/*!
    @method suppressesIncrementalRendering
    @result YES if the WebView suppresses incremental rendering; NO otherwise.
*/
- (BOOL)suppressesIncrementalRendering;

@end
