Source/WebKitLegacy/mac/WebView/WebPolicyDelegate.h - WebKit - Git at Google

 /*
  * Copyright (C) 2003, 2004, 2005, 2007 Apple 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 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>
 #import <WebKitLegacy/WebKitAvailability.h>

 #if !TARGET_OS_IPHONE
 #import <AppKit/AppKit.h>
 #endif

 @class NSError;
 @class NSURLResponse;
 @class NSURLRequest;
 @class WebView;
 @class WebFrame;
 @class WebPolicyPrivate;

 /*!
     @enum WebNavigationType
     @abstract The type of action that triggered a possible navigation.
     @constant WebNavigationTypeLinkClicked A link with an href was clicked.
     @constant WebNavigationTypeFormSubmitted A form was submitted.
     @constant WebNavigationTypeBackForward The user chose back or forward.
     @constant WebNavigationTypeReload The User hit the reload button.
     @constant WebNavigationTypeFormResubmitted A form was resubmitted (by virtue of doing back, forward or reload).
     @constant WebNavigationTypeOther Navigation is taking place for some other reason.
 */

 typedef NS_ENUM(NSInteger, WebNavigationType) {
     WebNavigationTypeLinkClicked,
     WebNavigationTypeFormSubmitted,
     WebNavigationTypeBackForward,
     WebNavigationTypeReload,
     WebNavigationTypeFormResubmitted,
     WebNavigationTypeOther
 } WEBKIT_ENUM_DEPRECATED_MAC(10_3, 10_14);

 extern NSString *WebActionNavigationTypeKey WEBKIT_DEPRECATED_MAC(10_3, 10_14); // NSNumber (WebNavigationType)
 extern NSString *WebActionElementKey WEBKIT_DEPRECATED_MAC(10_3, 10_14); // NSDictionary of element info
 extern NSString *WebActionButtonKey WEBKIT_DEPRECATED_MAC(10_3, 10_14); // NSNumber (0 for left button, 1 for middle button, 2 for right button)
 extern NSString *WebActionModifierFlagsKey WEBKIT_DEPRECATED_MAC(10_3, 10_14); // NSNumber (unsigned)
 extern NSString *WebActionOriginalURLKey WEBKIT_DEPRECATED_MAC(10_3, 10_14); // NSURL

 /*!
     @protocol WebPolicyDecisionListener
     @discussion This protocol is used to call back with the results of a
     policy decision. This provides the ability to make these decisions
     asyncrhonously, which means the decision can be made by prompting
     with a sheet, for example.
 */

 WEBKIT_DEPRECATED_MAC(10_3, 10_14)
 @protocol WebPolicyDecisionListener <NSObject>

 /*!
     @method use
     @abstract Use the resource
     @discussion If there remain more policy decisions to be made, then
     the next policy delegate method gets to decide. This will be
     either the next navigation policy delegate if there is a redirect,
     or the content policy delegate. If there are no more policy
     decisions to be made, the resource will be displayed inline if
     possible. If there is no view available to display the resource
     inline, then unableToImplementPolicyWithError:frame: will be
     called with an appropriate error.

     <p>If a new window is going to be created for this navigation as a
     result of frame targeting, then it will be created once you call
     this method.
 */
 - (void)use;
 /*!
     @method download
     @abstract Download the resource instead of displaying it.
     @discussion This method is more than just a convenience because it
     allows an in-progress navigation to be converted to a download
     based on content type, without having to stop and restart the
     load.
 */
 - (void)download;

 /*!
     @method ignore
     @abstract Do nothing (but the client may choose to handle the request itself)
     @discussion A policy of ignore prevents WebKit from doing anything
     further with the load, however, the client is still free to handle
     the request in some other way, such as opening a new window,
     opening a new window behind the current one, opening the URL in an
     external app, revealing the location in Finder if a file URL, etc.
 */
 - (void)ignore;

 @end


 /*!
     @category WebPolicyDelegate
     @discussion While loading a URL, WebKit asks the WebPolicyDelegate for
     policies that determine the action of what to do with the URL or the data that
     the URL represents. Typically, the policy handler methods are called in this order:

     decidePolicyForNewWindowAction:request:newFrameName:decisionListener: (at most once)<BR>
     decidePolicyForNavigationAction:request:frame:decisionListener: (zero or more times)<BR>
     decidePolicyForMIMEType:request:frame: (zero or more times)<BR>

     New window policy is always checked. Navigation policy is checked
     for the initial load and every redirect unless blocked by an
     earlier policy. Content policy is checked once the content type is
     known, unless an earlier policy prevented it.

     In rare cases, content policy might be checked more than
     once. This occurs when loading a "multipart/x-mixed-replace"
     document, also known as "server push". In this case, multiple
     documents come in one navigation, with each replacing the last. In
     this case, conent policy will be checked for each one.
 */
 WEBKIT_DEPRECATED_MAC(10_3, 10_14)
 @protocol WebPolicyDelegate <NSObject>

 @optional

 /*!
    @method webView:decidePolicyForNavigationAction:request:frame:decisionListener:
    @abstract This method is called to decide what to do with a proposed navigation.
    @param actionInformation Dictionary that describes the action that triggered this navigation.
    @param request The request for the proposed navigation
    @param frame The WebFrame in which the navigation is happening
    @param listener The object to call when the decision is made
    @discussion This method will be called before loading starts, and
    on every redirect.
 */
 - (void)webView:(WebView *)webView decidePolicyForNavigationAction:(NSDictionary *)actionInformation
                                                            request:(NSURLRequest *)request
                                                              frame:(WebFrame *)frame
                                                   decisionListener:(id<WebPolicyDecisionListener>)listener;

 /*!
     @method webView:decidePolicyForNewWindowAction:request:newFrameName:decisionListener:
     @discussion This method is called to decide what to do with an targetted nagivation that would open a new window.
     @param actionInformation Dictionary that describes the action that triggered this navigation.
     @param request The request for the proposed navigation
     @param frameName The frame in which the navigation is taking place
     @param listener The object to call when the decision is made
     @discussion This method is provided so that modified clicks on a targetted link which
     opens a new frame can prevent the new window from being opened if they decide to
     do something else, like download or present the new frame in a specialized way.

     <p>If this method picks a policy of Use, the new window will be
     opened, and decidePolicyForNavigationAction:request:frame:decisionListner:
     will be called with a WebNavigationType of WebNavigationTypeOther
     in its action. This is to avoid possible confusion about the modifiers.
 */
 - (void)webView:(WebView *)webView decidePolicyForNewWindowAction:(NSDictionary *)actionInformation
                                                           request:(NSURLRequest *)request
                                                      newFrameName:(NSString *)frameName
                                                  decisionListener:(id<WebPolicyDecisionListener>)listener;

 /*!
     @method webView:decidePolicyForMIMEType:request:frame:
     @discussion Returns the policy for content which has been partially loaded.
     Sent after webView:didStartProvisionalLoadForFrame: is sent on the WebFrameLoadDelegate.
     @param type MIME type for the resource.
     @param request A NSURLRequest for the partially loaded content.
     @param frame The frame which is loading the URL.
     @param listener The object to call when the decision is made
 */
 - (void)webView:(WebView *)webView decidePolicyForMIMEType:(NSString *)type
                                                    request:(NSURLRequest *)request
                                                      frame:(WebFrame *)frame
                                           decisionListener:(id<WebPolicyDecisionListener>)listener;

 /*!
     @method webView:unableToImplementPolicy:error:forURL:inFrame:
     @discussion Called when a WebPolicy could not be implemented. It is up to the client to display appropriate feedback.
     @param error The error that caused the policy to not be implemented.
     @param frame The frame in which the policy could not be implemented.
 */
 - (void)webView:(WebView *)webView unableToImplementPolicyWithError:(NSError *)error frame:(WebFrame *)frame;

 @end
	/*
	* Copyright (C) 2003, 2004, 2005, 2007 Apple 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 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>
	#import <WebKitLegacy/WebKitAvailability.h>

	#if !TARGET_OS_IPHONE
	#import <AppKit/AppKit.h>
	#endif

	@class NSError;
	@class NSURLResponse;
	@class NSURLRequest;
	@class WebView;
	@class WebFrame;
	@class WebPolicyPrivate;

	/*!
	@enum WebNavigationType
	@abstract The type of action that triggered a possible navigation.
	@constant WebNavigationTypeLinkClicked A link with an href was clicked.
	@constant WebNavigationTypeFormSubmitted A form was submitted.
	@constant WebNavigationTypeBackForward The user chose back or forward.
	@constant WebNavigationTypeReload The User hit the reload button.
	@constant WebNavigationTypeFormResubmitted A form was resubmitted (by virtue of doing back, forward or reload).
	@constant WebNavigationTypeOther Navigation is taking place for some other reason.
	*/

	typedef NS_ENUM(NSInteger, WebNavigationType) {
	WebNavigationTypeLinkClicked,
	WebNavigationTypeFormSubmitted,
	WebNavigationTypeBackForward,
	WebNavigationTypeReload,
	WebNavigationTypeFormResubmitted,
	WebNavigationTypeOther
	} WEBKIT_ENUM_DEPRECATED_MAC(10_3, 10_14);

	extern NSString *WebActionNavigationTypeKey WEBKIT_DEPRECATED_MAC(10_3, 10_14); // NSNumber (WebNavigationType)
	extern NSString *WebActionElementKey WEBKIT_DEPRECATED_MAC(10_3, 10_14); // NSDictionary of element info
	extern NSString *WebActionButtonKey WEBKIT_DEPRECATED_MAC(10_3, 10_14); // NSNumber (0 for left button, 1 for middle button, 2 for right button)
	extern NSString *WebActionModifierFlagsKey WEBKIT_DEPRECATED_MAC(10_3, 10_14); // NSNumber (unsigned)
	extern NSString *WebActionOriginalURLKey WEBKIT_DEPRECATED_MAC(10_3, 10_14); // NSURL

	/*!
	@protocol WebPolicyDecisionListener
	@discussion This protocol is used to call back with the results of a
	policy decision. This provides the ability to make these decisions
	asyncrhonously, which means the decision can be made by prompting
	with a sheet, for example.
	*/

	WEBKIT_DEPRECATED_MAC(10_3, 10_14)
	@protocol WebPolicyDecisionListener <NSObject>

	/*!
	@method use
	@abstract Use the resource
	@discussion If there remain more policy decisions to be made, then
	the next policy delegate method gets to decide. This will be
	either the next navigation policy delegate if there is a redirect,
	or the content policy delegate. If there are no more policy
	decisions to be made, the resource will be displayed inline if
	possible. If there is no view available to display the resource
	inline, then unableToImplementPolicyWithError:frame: will be
	called with an appropriate error.

	<p>If a new window is going to be created for this navigation as a
	result of frame targeting, then it will be created once you call
	this method.
	*/
	- (void)use;
	/*!
	@method download
	@abstract Download the resource instead of displaying it.
	@discussion This method is more than just a convenience because it
	allows an in-progress navigation to be converted to a download
	based on content type, without having to stop and restart the
	load.
	*/
	- (void)download;

	/*!
	@method ignore
	@abstract Do nothing (but the client may choose to handle the request itself)
	@discussion A policy of ignore prevents WebKit from doing anything
	further with the load, however, the client is still free to handle
	the request in some other way, such as opening a new window,
	opening a new window behind the current one, opening the URL in an
	external app, revealing the location in Finder if a file URL, etc.
	*/
	- (void)ignore;

	@end


	/*!
	@category WebPolicyDelegate
	@discussion While loading a URL, WebKit asks the WebPolicyDelegate for
	policies that determine the action of what to do with the URL or the data that
	the URL represents. Typically, the policy handler methods are called in this order:

	decidePolicyForNewWindowAction:request:newFrameName:decisionListener: (at most once)<BR>
	decidePolicyForNavigationAction:request:frame:decisionListener: (zero or more times)<BR>
	decidePolicyForMIMEType:request:frame: (zero or more times)<BR>

	New window policy is always checked. Navigation policy is checked
	for the initial load and every redirect unless blocked by an
	earlier policy. Content policy is checked once the content type is
	known, unless an earlier policy prevented it.

	In rare cases, content policy might be checked more than
	once. This occurs when loading a "multipart/x-mixed-replace"
	document, also known as "server push". In this case, multiple
	documents come in one navigation, with each replacing the last. In
	this case, conent policy will be checked for each one.
	*/
	WEBKIT_DEPRECATED_MAC(10_3, 10_14)
	@protocol WebPolicyDelegate <NSObject>

	@optional

	/*!
	@method webView:decidePolicyForNavigationAction:request:frame:decisionListener:
	@abstract This method is called to decide what to do with a proposed navigation.
	@param actionInformation Dictionary that describes the action that triggered this navigation.
	@param request The request for the proposed navigation
	@param frame The WebFrame in which the navigation is happening
	@param listener The object to call when the decision is made
	@discussion This method will be called before loading starts, and
	on every redirect.
	*/
	- (void)webView:(WebView )webView decidePolicyForNavigationAction:(NSDictionary )actionInformation
	request:(NSURLRequest *)request
	frame:(WebFrame *)frame
	decisionListener:(id<WebPolicyDecisionListener>)listener;

	/*!
	@method webView:decidePolicyForNewWindowAction:request:newFrameName:decisionListener:
	@discussion This method is called to decide what to do with an targetted nagivation that would open a new window.
	@param actionInformation Dictionary that describes the action that triggered this navigation.
	@param request The request for the proposed navigation
	@param frameName The frame in which the navigation is taking place
	@param listener The object to call when the decision is made
	@discussion This method is provided so that modified clicks on a targetted link which
	opens a new frame can prevent the new window from being opened if they decide to
	do something else, like download or present the new frame in a specialized way.

	<p>If this method picks a policy of Use, the new window will be
	opened, and decidePolicyForNavigationAction:request:frame:decisionListner:
	will be called with a WebNavigationType of WebNavigationTypeOther
	in its action. This is to avoid possible confusion about the modifiers.
	*/
	- (void)webView:(WebView )webView decidePolicyForNewWindowAction:(NSDictionary )actionInformation
	request:(NSURLRequest *)request
	newFrameName:(NSString *)frameName
	decisionListener:(id<WebPolicyDecisionListener>)listener;

	/*!
	@method webView:decidePolicyForMIMEType:request:frame:
	@discussion Returns the policy for content which has been partially loaded.
	Sent after webView:didStartProvisionalLoadForFrame: is sent on the WebFrameLoadDelegate.
	@param type MIME type for the resource.
	@param request A NSURLRequest for the partially loaded content.
	@param frame The frame which is loading the URL.
	@param listener The object to call when the decision is made
	*/
	- (void)webView:(WebView )webView decidePolicyForMIMEType:(NSString )type
	request:(NSURLRequest *)request
	frame:(WebFrame *)frame
	decisionListener:(id<WebPolicyDecisionListener>)listener;

	/*!
	@method webView:unableToImplementPolicy:error:forURL:inFrame:
	@discussion Called when a WebPolicy could not be implemented. It is up to the client to display appropriate feedback.
	@param error The error that caused the policy to not be implemented.
	@param frame The frame in which the policy could not be implemented.
	*/
	- (void)webView:(WebView )webView unableToImplementPolicyWithError:(NSError )error frame:(WebFrame *)frame;

	@end