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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsIProtocolHandler.idl"
+
+interface nsIFile;
+interface nsIURIMutator;
+
+[scriptable, uuid(1fb25bd5-4354-4dcd-8d97-621b7b3ed2e4)]
+interface nsIFileProtocolHandler : nsIProtocolHandler
+{
+ /**
+ * This method constructs a new file URI
+ *
+ * @param aFile nsIFile
+ * @return reference to a new nsIURI object
+ */
+ nsIURI newFileURI(in nsIFile aFile);
+
+ /**
+ * This method constructs a new file URI, and returns a URI mutator
+ * that has not yet been finalized, allowing the URI to be changed without
+ * being cloned.
+ *
+ * @param aFile nsIFile
+ * @return reference to a new nsIURIMutator object
+ */
+ nsIURIMutator newFileURIMutator(in nsIFile file);
+
+ /**
+ * DEPRECATED, AVOID IF AT ALL POSSIBLE.
+ *
+ * Calling this will cause IO on the calling thread, to determine
+ * if the file is a directory or file, and based on that behaves as
+ * if you called getURLSpecFromDir or getURLSpecFromActualFile,
+ * respectively. This IO may take multiple seconds (e.g. for network
+ * paths, slow external drives that need to be woken up, etc.).
+ *
+ * Usually, the caller should *know* that the `file` argument is
+ * either a directory (in which case it should call getURLSpecFromDir)
+ * or a non-directory file (in which case it should call
+ * getURLSpecFromActualFile), and not need to call this method.
+ */
+ [noscript] AUTF8String getURLSpecFromFile(in nsIFile file);
+
+ /**
+ * Converts a non-directory nsIFile to the corresponding URL string.
+ * NOTE: under some platforms this is a lossy conversion (e.g., Mac
+ * Carbon build). If the nsIFile is a local file, then the result
+ * will be a file:// URL string.
+ *
+ * The resulting string may contain URL-escaped characters.
+ *
+ * Should only be called on files which are not directories. If
+ * called on directories, the resulting URL may lack a trailing slash
+ * and cause relative URLs in such a document to misbehave.
+ */
+ AUTF8String getURLSpecFromActualFile(in nsIFile file);
+
+ /**
+ * Converts a directory nsIFile to the corresponding URL string.
+ * NOTE: under some platforms this is a lossy conversion (e.g., Mac
+ * Carbon build). If the nsIFile is a local file, then the result
+ * will be a file:// URL string.
+ *
+ * The resulting string may contain URL-escaped characters.
+ *
+ * Should only be called on files which are directories (will enforce
+ * the URL ends with a slash).
+ */
+ AUTF8String getURLSpecFromDir(in nsIFile file);
+
+ /**
+ * Converts the URL string into the corresponding nsIFile if possible.
+ * A local file will be created if the URL string begins with file://.
+ */
+ nsIFile getFileFromURLSpec(in AUTF8String url);
+
+ /**
+ * Takes a local file and tries to interpret it as an internet shortcut
+ * (e.g. .url files on windows).
+ * @param file The local file to read
+ * @return The URI the file refers to
+ *
+ * @throw NS_ERROR_NOT_AVAILABLE if the OS does not support such files.
+ * @throw NS_ERROR_NOT_AVAILABLE if this file is not an internet shortcut.
+ */
+ nsIURI readURLFile(in nsIFile file);
+
+ /**
+ * Takes a local file and tries to interpret it as a shell link file
+ * (.lnk files on Windows)
+ * @param file The local file to read
+ * @return The URI the file refers to
+ *
+ * @throw NS_ERROR_NOT_AVAILABLE if the OS does not support such files.
+ * @throw NS_ERROR_NOT_AVAILABLE if this file is not a shell link.
+ */
+ nsIURI readShellLink(in nsIFile file);
+};