/* -*- Mode: IDL; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 *
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 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is
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 * Portions created by the Initial Developer are Copyright (C) 1998
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
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/**
 * An nsIMIMEInfo gives a user access to mime information.
 * there is a one-to-many relationship between MIME types
 * and file extensions. This means that a MIMEInfo object
 * may have multiple file extensions associated with it.
 * However, the reverse is not true.
 *
 * MIMEInfo objects are generally retrieved from the MIME Service
 * @see nsIMIMEService
 */

#include "nsISupports.idl"

interface nsIURI;
interface nsIFile;
interface nsIUTF8StringEnumerator;

typedef long nsMIMEInfoHandleAction;

[scriptable, uuid(1448b42f-cf0d-466e-9a15-64e876ebe857)]
interface nsIMIMEInfo : nsISupports {
    /**
     * Gives you an array of file types associated with this type.
     *
     * @return Number of elements in the array.
     * @return Array of extensions.
     */
    nsIUTF8StringEnumerator getFileExtensions();

    /**
     * Set File Extensions. Input is a comma delimited list of extensions.
     */
    void setFileExtensions(in AUTF8String aExtensions);
 
    /**
     * Returns whether or not the given extension is
     * associated with this MIME info.
     *
     * @return TRUE if the association exists. 
     */
    boolean extensionExists(in AUTF8String aExtension);

    /**
     * Append a given extension to the set of extensions
     */
    void appendExtension(in AUTF8String aExtension);

    /**
     * Returns the first extension association in
     * the internal set of extensions.
     *
     * @return The first extension.
     */
    attribute AUTF8String primaryExtension;
    
    /**
     * The MIME type of this MIMEInfo.
     * 
     * @return String representing the MIME type.
     */
    readonly attribute ACString MIMEType;

    /**
     * A human readable description of the MIME info.
     *
     * @return The description
     */
    attribute AString description;

    /**
     * Mac Type and creator types
     */
    attribute PRUint32 macType;
    attribute PRUint32 macCreator;

    /**
     * Returns whether or not these two MIME infos are logically
     * equivalent maintaining the one-to-many relationship between
     * MIME types and file extensions.
     *
     * @returns TRUE if the two are considered equal
     */
    boolean equals(in nsIMIMEInfo aMIMEInfo);

    /**
     * Returns a nsIFile that points to the application the user has said
     * they want associated with this content type. This is not always
     * guaranteed to be set!!
     */
    attribute nsIFile preferredApplicationHandler;

    /**
     * A pretty name description of the preferred application.
     */
    attribute AString applicationDescription;

    /**
     * Indicates whether a default application handler exists,
     * i.e. whether launchWithFile with action = useSystemDefault is possible
     * and applicationDescription will contain usable information.
     */
    readonly attribute boolean hasDefaultHandler;

    /**
     * A pretty name description of the associated default application. Only
     * usable if hasDefaultHandler is true.
     */
    readonly attribute AString defaultDescription;

    /**
     * Launches the application with the specified file, in a way that
     * depends on the value of preferredAction. preferredAction must be
     * useHelperApp or useSystemDefault.
     *
     * @param aFile The file to launch this application with.
     *
     * @throw NS_ERROR_INVALID_ARG if action is not valid for this function.
     * Other exceptions may be thrown.
     */
    void launchWithFile(in nsIFile aFile);

    const long saveToDisk = 0;
    const long alwaysAsk = 1;
    const long useHelperApp = 2;
    const long handleInternally = 3;
    const long useSystemDefault = 4;

    /**
     * preferredAction is how the user specified they would like to handle
     * this content type: save to disk, use specified helper app, use OS
     * default handler or handle using navigator.
     */
    attribute nsMIMEInfoHandleAction preferredAction;

    /**
     * alwaysAskBeforeHandling: if true, we should always give the user a
     * dialog asking how to dispose of this content.
     */
    attribute boolean alwaysAskBeforeHandling;
};