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| -rw-r--r-- | xpcom/io/nsIFile.idl | 597 |
1 files changed, 597 insertions, 0 deletions
diff --git a/xpcom/io/nsIFile.idl b/xpcom/io/nsIFile.idl new file mode 100644 index 0000000000..535a7a88ee --- /dev/null +++ b/xpcom/io/nsIFile.idl @@ -0,0 +1,597 @@ +/* -*- 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 "nsISupports.idl" +#include "nsIDirectoryEnumerator.idl" + +%{C++ +struct PRFileDesc; +struct PRLibrary; +#include <stdio.h> +#include "mozilla/Path.h" +#include "nsCOMPtr.h" +#include "nsStringFwd.h" +namespace mozilla { +using PathString = nsTString<filesystem::Path::value_type>; +using PathSubstring = nsTSubstring<filesystem::Path::value_type>; +} // namespace mozilla +%} + +[ptr] native PRFileDescStar(PRFileDesc); +[ptr] native PRLibraryStar(PRLibrary); +[ptr] native FILE(FILE); +native PathString(mozilla::PathString); + +/** + * An nsIFile is an abstract representation of a filename. It manages + * filename encoding issues, pathname component separators ('/' vs. '\\' + * vs. ':') and weird stuff like differing volumes with identical names, as + * on pre-Darwin Macintoshes. + * + * This file has long introduced itself to new hackers with this opening + * paragraph: + * + * This is the only correct cross-platform way to specify a file. + * Strings are not such a way. If you grew up on windows or unix, you + * may think they are. Welcome to reality. + * + * While taking the pose struck here to heart would be uncalled for, one + * may safely conclude that writing cross-platform code is an embittering + * experience. + * + * All methods with string parameters have two forms. The preferred + * form operates on UCS-2 encoded characters strings. An alternate + * form operates on characters strings encoded in the "native" charset. + * + * A string containing characters encoded in the native charset cannot + * be safely passed to javascript via xpconnect. Therefore, the "native + * methods" are not scriptable. + */ +[scriptable, main_process_scriptable_only, uuid(2fa6884a-ae65-412a-9d4c-ce6e34544ba1), builtinclass] +interface nsIFile : nsISupports +{ + /** + * Create Types + * + * NORMAL_FILE_TYPE - A normal file. + * DIRECTORY_TYPE - A directory/folder. + */ + const unsigned long NORMAL_FILE_TYPE = 0; + const unsigned long DIRECTORY_TYPE = 1; + + /** + * append[Native] + * + * This function is used for constructing a descendent of the + * current nsIFile. + * + * @param node + * A string which is intended to be a child node of the nsIFile. + * For security reasons, this cannot contain .. and cannot start with + * a directory separator. For the |appendNative| method, the node must + * be in the native filesystem charset. + */ + void append(in AString node); + [noscript] void appendNative(in ACString node); + + /** + * Normalize the pathName (e.g. removing .. and . components on Unix). + */ + void normalize(); + + /** + * create + * + * This function will create a new file or directory in the + * file system. Any nodes that have not been created or + * resolved, will be. If the file or directory already + * exists create() will return NS_ERROR_FILE_ALREADY_EXISTS. + * + * @param type + * This specifies the type of file system object + * to be made. The only two types at this time + * are file and directory which are defined above. + * If the type is unrecongnized, we will return an + * error (NS_ERROR_FILE_UNKNOWN_TYPE). + * + * @param permissions + * The unix style octal permissions. This may + * be ignored on systems that do not need to do + * permissions. + * + * @param skipAncestors + * Optional; if set to true, we'll skip creating + * ancestor directories (and return an error instead). + */ + [must_use] void create(in unsigned long type, in unsigned long permissions, + [optional,default(false)] in bool skipAncestors); + + /** + * Accessor to the leaf name of the file itself. + * For the |nativeLeafName| method, the nativeLeafName must + * be in the native filesystem charset. + */ + attribute AString leafName; + [noscript] attribute ACString nativeLeafName; + + /** + * The leaf name as displayed in OS-provided file pickers and similar UI. + * On Windows and macOS, 'real' leaf names of some directories can be + * in English, but the OS will show a different, translated name to users + * using a different locale. So folders like "Downloads", "Desktop" and + * "Documents" might not normally appear to users with that (English) name, + * but with an OS-localized translation. This API will return such a + * translation if it exists, or the leafName if it doesn't. + * On Linux, this will always be the same as `leafName`. + */ + readonly attribute AString displayName; + + /** + * copyTo[Native] + * + * This will copy this file to the specified newParentDir. + * If a newName is specified, the file will be renamed. + * If 'this' is not created we will return an error + * (NS_ERROR_FILE_NOT_FOUND). + * + * copyTo may fail if the file already exists in the destination + * directory. + * + * copyTo will NOT resolve aliases/shortcuts during the copy. + * + * @param newParentDir + * This param is the destination directory. If the + * newParentDir is null, copyTo() will use the parent + * directory of this file. If the newParentDir is not + * empty and is not a directory, an error will be + * returned (NS_ERROR_FILE_DESTINATION_NOT_DIR). For the + * |CopyToNative| method, the newName must be in the + * native filesystem charset. + * + * @param newName + * This param allows you to specify a new name for + * the file to be copied. This param may be empty, in + * which case the current leaf name will be used. + */ + void copyTo(in nsIFile newParentDir, in AString newName); + [noscript] void CopyToNative(in nsIFile newParentDir, in ACString newName); + + /** + * copyToFollowingLinks[Native] + * + * This function is identical to copyTo with the exception that, + * as the name implies, it follows symbolic links. The XP_UNIX + * implementation always follow symbolic links when copying. For + * the |CopyToFollowingLinks| method, the newName must be in the + * native filesystem charset. + */ + void copyToFollowingLinks(in nsIFile newParentDir, in AString newName); + [noscript] void copyToFollowingLinksNative(in nsIFile newParentDir, in ACString newName); + + /** + * moveTo[Native] + * + * A method to move this file or directory to newParentDir. + * If a newName is specified, the file or directory will be renamed. + * If 'this' is not created we will return an error + * (NS_ERROR_FILE_NOT_FOUND). + * If 'this' is a file, and the destination file already exists, moveTo + * will replace the old file. + * This object is updated to refer to the new file. + * + * moveTo will NOT resolve aliases/shortcuts during the copy. + * moveTo will do the right thing and allow copies across volumes. + * moveTo will return an error (NS_ERROR_FILE_DIR_NOT_EMPTY) if 'this' is + * a directory and the destination directory is not empty. + * moveTo will return an error (NS_ERROR_FILE_ACCESS_DENIED) if 'this' is + * a directory and the destination directory is not writable. + * + * @param newParentDir + * This param is the destination directory. If the + * newParentDir is empty, moveTo() will rename the file + * within its current directory. If the newParentDir is + * not empty and does not name a directory, an error will + * be returned (NS_ERROR_FILE_DESTINATION_NOT_DIR). For + * the |moveToNative| method, the newName must be in the + * native filesystem charset. + * + * @param newName + * This param allows you to specify a new name for + * the file to be moved. This param may be empty, in + * which case the current leaf name will be used. + */ + void moveTo(in nsIFile newParentDir, in AString newName); + [noscript] void moveToNative(in nsIFile newParentDir, in ACString newName); + + /** + * moveToFollowingLinks[Native] + * + * This function is identical to moveTo with the exception that, + * as the name implies, it follows symbolic links. The XP_UNIX + * implementation always follows symbolic links when moving. For + * the |MoveToFollowingLinks| method, the newName ust be in the native + * filesystem charset. + */ + void moveToFollowingLinks(in nsIFile newParentDir, in AString newName); + [noscript] void moveToFollowingLinksNative(in nsIFile newParentDir, in ACString newName); + + /** + * renameTo + * + * This method is identical to moveTo except that if this file or directory + * is moved to a a different volume, it fails and returns an error + * (NS_ERROR_FILE_ACCESS_DENIED). + * This object will still point to the old location after renaming. + */ + void renameTo(in nsIFile newParentDir, in AString newName); + [noscript] void renameToNative(in nsIFile newParentDir, in ACString newName); + + /** + * This will try to delete this file. The 'recursive' flag + * must be PR_TRUE to delete directories which are not empty. + * + * If passed, 'removeCount' will be incremented by the total number of files + * and/or directories removed. Will be 1 unless the 'recursive' flag is + * set. The parameter must be initialized beforehand. + * + * This will not resolve any symlinks. + */ + void remove(in boolean recursive, [optional] inout uint32_t removeCount); + + /** + * Attributes of nsIFile. + */ + + attribute unsigned long permissions; + attribute unsigned long permissionsOfLink; + + /** + * The last accesss time of the file in milliseconds from midnight, January + * 1, 1970 GMT, if available. + */ + attribute PRTime lastAccessedTime; + attribute PRTime lastAccessedTimeOfLink; + + /** + * File Times are to be in milliseconds from + * midnight (00:00:00), January 1, 1970 Greenwich Mean + * Time (GMT). + */ + attribute PRTime lastModifiedTime; + attribute PRTime lastModifiedTimeOfLink; + + /** + * The creation time of file in milliseconds from midnight, January 1, 1970 + * GMT, if available. + * + * This attribute is only implemented on Windows and macOS. Accessing this + * on another platform will this will throw NS_ERROR_NOT_IMPLEMENTED. + */ + readonly attribute PRTime creationTime; + readonly attribute PRTime creationTimeOfLink; + + /** + * WARNING! On the Mac, getting/setting the file size with nsIFile + * only deals with the size of the data fork. If you need to + * know the size of the combined data and resource forks use the + * GetFileSizeWithResFork() method defined on nsILocalFileMac. + */ + attribute int64_t fileSize; + readonly attribute int64_t fileSizeOfLink; + + /** + * target & path + * + * Accessor to the string path. The native version of these + * strings are not guaranteed to be a usable path to pass to + * NSPR or the C stdlib. There are problems that affect + * platforms on which a path does not fully specify a file + * because two volumes can have the same name (e.g., mac). + * This is solved by holding "private", native data in the + * nsIFile implementation. This native data is lost when + * you convert to a string. + * + * DO NOT PASS TO USE WITH NSPR OR STDLIB! + * + * target + * Find out what the symlink points at. Will give error + * (NS_ERROR_FILE_INVALID_PATH) if not a symlink. + * + * path + * Find out what the nsIFile points at. + * + * Note that the ACString attributes are returned in the + * native filesystem charset. + * + */ + readonly attribute AString target; + [noscript] readonly attribute ACString nativeTarget; + readonly attribute AString path; + [notxpcom,nostdcall,must_use] PathString nativePath(); +%{C++ +#ifndef XP_WIN + nsresult GetNativePath(nsACString& aPath); +#endif + /* + * Returns a human-readable path string. + */ + nsCString HumanReadablePath(); +%} + + boolean exists(); + boolean isWritable(); + boolean isReadable(); + boolean isExecutable(); + boolean isHidden(); + boolean isDirectory(); + boolean isFile(); + boolean isSymlink(); + /** + * Not a regular file, not a directory, not a symlink. + */ + boolean isSpecial(); + + /** + * createUnique + * + * This function will create a new file or directory in the + * file system. Any nodes that have not been created or + * resolved, will be. If this file already exists, we try + * variations on the leaf name "suggestedName" until we find + * one that did not already exist. + * + * If the search for nonexistent files takes too long + * (thousands of the variants already exist), we give up and + * return NS_ERROR_FILE_TOO_BIG. + * + * @param type + * This specifies the type of file system object + * to be made. The only two types at this time + * are file and directory which are defined above. + * If the type is unrecongnized, we will return an + * error (NS_ERROR_FILE_UNKNOWN_TYPE). + * + * @param permissions + * The unix style octal permissions. This may + * be ignored on systems that do not need to do + * permissions. + */ + [must_use] + void createUnique(in unsigned long type, in unsigned long permissions); + + /** + * clone() + * + * This function will allocate and initialize a nsIFile object to the + * exact location of the |this| nsIFile. + * + * @param file + * A nsIFile which this object will be initialize + * with. + * + */ + nsIFile clone(); + + /** + * Will determine if the inFile equals this. + */ + boolean equals(in nsIFile inFile); + + /** + * Will determine if inFile is a descendant of this file. + * This routine looks in subdirectories too. + */ + boolean contains(in nsIFile inFile); + + /** + * Parent will be null when this is at the top of the volume. + */ + readonly attribute nsIFile parent; + + /** + * Returns an enumeration of the elements in a directory. Each + * element in the enumeration is an nsIFile. + * + * @throws NS_ERROR_FILE_NOT_DIRECTORY if the current nsIFile does + * not specify a directory. + */ + [binaryname(DirectoryEntriesImpl)] + readonly attribute nsIDirectoryEnumerator directoryEntries; + + %{C++ + nsresult GetDirectoryEntries(nsIDirectoryEnumerator** aOut) + { + return GetDirectoryEntriesImpl(aOut); + }; + %} + + /** + * initWith[Native]Path + * + * This function will initialize the nsIFile object. Any + * internal state information will be reset. + * + * @param filePath + * A string which specifies a full file path to a + * location. Relative paths will be treated as an + * error (NS_ERROR_FILE_UNRECOGNIZED_PATH). For + * initWithNativePath, the filePath must be in the native + * filesystem charset. + */ + void initWithPath(in AString filePath); + [noscript] void initWithNativePath(in ACString filePath); + + /** + * initWithFile + * + * Initialize this object with another file + * + * @param aFile + * the file this becomes equivalent to + */ + void initWithFile(in nsIFile aFile); + + /** + * Flag for openNSPRFileDesc(), to hint to the OS that the file will be + * read sequentially with agressive readahead. + */ + const unsigned long OS_READAHEAD = 0x40000000; + + /** + * Flag for openNSPRFileDesc(). Deprecated and unreliable! + * Instead use NS_OpenAnonymousTemporaryFile() to create a temporary + * file which will be deleted upon close! + */ + const unsigned long DELETE_ON_CLOSE = 0x80000000; + + /** + * Return the result of PR_Open on the file. The caller is + * responsible for calling PR_Close on the result. On success, the + * returned PRFileDescr must be non-null. + * + * @param flags the PR_Open flags from prio.h, plus optionally + * OS_READAHEAD or DELETE_ON_CLOSE. OS_READAHEAD is a hint to the + * OS that the file will be read sequentially with agressive + * readahead. DELETE_ON_CLOSE is unreliable on Windows and is deprecated. + * Instead use NS_OpenAnonymousTemporaryFile() to create a temporary + * file which will be deleted upon close. + */ + [noscript, must_use] PRFileDescStar openNSPRFileDesc(in long flags, + in long mode); + + /** + * Return the result of fopen on the file. The caller is + * responsible for calling fclose on the result. On success, the + * returned FILE pointer must be non-null. + */ + [noscript, must_use] FILE openANSIFileDesc(in string mode); + + /** + * Return the result of PR_LoadLibrary on the file. The caller is + * responsible for calling PR_UnloadLibrary on the result. + */ + [noscript, must_use] PRLibraryStar load(); + + // number of bytes available on disk to non-superuser + [must_use] readonly attribute int64_t diskSpaceAvailable; + + // disk capacity in bytes + [must_use] readonly attribute int64_t diskCapacity; + + /** + * appendRelative[Native]Path + * + * Append a relative path to the current path of the nsIFile object. + * + * @param relativeFilePath + * relativeFilePath is a native relative path. For security reasons, + * this cannot contain .. and cannot start with a directory separator. + * For the |appendRelativeNativePath| method, the relativeFilePath + * must be in the native filesystem charset. + */ + void appendRelativePath(in AString relativeFilePath); + [noscript] void appendRelativeNativePath(in ACString relativeFilePath); + + /** + * Accessor to a null terminated string which will specify + * the file in a persistent manner for disk storage. + * + * The character set of this attribute is undefined. DO NOT TRY TO + * INTERPRET IT AS HUMAN READABLE TEXT! + */ + [must_use] attribute ACString persistentDescriptor; + + /** + * reveal + * + * Ask the operating system to open the folder which contains + * this file or folder. This routine only works on platforms which + * support the ability to open a folder and is run async on Windows. + * This routine must be called on the main. + */ + [must_use] void reveal(); + + /** + * launch + * + * Ask the operating system to attempt to open the file. + * this really just simulates "double clicking" the file on your platform. + * This routine only works on platforms which support this functionality + * and is run async on Windows. This routine must be called on the + * main thread. + */ + [must_use] void launch(); + + /** + * getRelativeDescriptor + * + * Returns a relative file path in an opaque, XP format. It is therefore + * not a native path. + * + * The character set of the string returned from this function is + * undefined. DO NOT TRY TO INTERPRET IT AS HUMAN READABLE TEXT! + * + * @param fromFile + * the file from which the descriptor is relative. + * Throws if fromFile is null. + */ + [must_use] ACString getRelativeDescriptor(in nsIFile fromFile); + + /** + * setRelativeDescriptor + * + * Initializes the file to the location relative to fromFile using + * a string returned by getRelativeDescriptor. + * + * @param fromFile + * the file to which the descriptor is relative + * @param relative + * the relative descriptor obtained from getRelativeDescriptor + */ + [must_use] + void setRelativeDescriptor(in nsIFile fromFile, in ACString relativeDesc); + + /** + * getRelativePath + * + * Returns a relative file from 'fromFile' to this file as a UTF-8 string. + * Going up the directory tree is represented via "../". '/' is used as + * the path segment separator. This is not a native path, since it's UTF-8 + * encoded. + * + * @param fromFile + * the file from which the path is relative. + * Throws if fromFile is null. + */ + [must_use] AUTF8String getRelativePath(in nsIFile fromFile); + + /** + * setRelativePath + * + * Initializes the file to the location relative to fromFile using + * a string returned by getRelativePath. + * + * @param fromFile + * the file from which the path is relative + * @param relative + * the relative path obtained from getRelativePath + */ + [must_use] + void setRelativePath(in nsIFile fromFile, in AUTF8String relativeDesc); +}; + +%{C++ +#ifdef MOZILLA_INTERNAL_API +#include "nsDirectoryServiceUtils.h" +#include "nsString.h" + +inline std::ostream& operator<<(std::ostream& aOut, const nsIFile& aFile) { + nsIFile* file = const_cast<nsIFile*>(&aFile); + nsAutoString path; + file->GetPath(path); + return aOut << "nsIFile { " << path << " }"; +} +#endif +%} |