4c51a665c6
Applied patch by snowleopard2 fixing a bunch of typos such as misspellings and double words in the documentation. Combined the patch with some local queued typos waiting to be committed as well as adding new typo fixes inspired by the patch.
Function names with American spelling were not changed nor was third-party code touched. The only code changes involve some changes in strings that are translated ("Can not" -> "Cannot").
Closes #13063 (again).
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@67280 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
417 lines
15 KiB
Objective-C
417 lines
15 KiB
Objective-C
/////////////////////////////////////////////////////////////////////////////
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// Name: mimetype.h
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// Purpose: interface of wxMimeTypesManager
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// Author: wxWidgets team
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// RCS-ID: $Id$
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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/**
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@class wxMimeTypesManager
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This class allows the application to retrieve informations about all known
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MIME types from a system-specific location and the filename extensions to the
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MIME types and vice versa.
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MIME stands for "Multipurpose Internet Mail Extensions" and was originally
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used in mail protocols. It's standardized by several RFCs.
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Under Windows, the MIME type information is queried from registry.
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Under Linux and Unix, it is queried from the XDG data directories.
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Currently, wxMimeTypesManager is limited to @e reading MIME type information.
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The application should not construct its own manager: it should use the
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object pointer ::wxTheMimeTypesManager.
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The functions GetFileTypeFromMimeType() and GetFileTypeFromExtension()
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return a wxFileType object which may be further queried for file description,
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icon and other attributes.
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@section mimetypemanager_helpers Helper functions
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All of these functions are static (i.e. don't need a wxMimeTypesManager object
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to call them) and provide some useful operations for string representations of
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MIME types. Their usage is recommended instead of directly working with MIME
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types using wxString functions.
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- wxMimeTypesManager::IsOfType()
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@section mimetypemanager_query Query database
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These functions are the heart of this class: they allow to find a file type
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object from either file extension or MIME type.
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If the function is successful, it returns a pointer to the wxFileType object
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which must be deleted by the caller, otherwise @NULL will be returned.
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- wxMimeTypesManager::GetFileTypeFromMimeType()
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- wxMimeTypesManager::GetFileTypeFromExtension()
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@library{wxbase}
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@category{cfg}
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@see wxFileType
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*/
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class wxMimeTypesManager
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{
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public:
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/**
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Constructor puts the object in the "working" state.
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*/
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wxMimeTypesManager();
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/**
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Destructor is not virtual, so this class should not be derived from.
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*/
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~wxMimeTypesManager();
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/**
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This function may be used to provide hard-wired fallbacks for the MIME types
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and extensions that might not be present in the system MIME database.
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Please see the typetest sample for an example of using it.
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*/
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void AddFallbacks(const wxFileTypeInfo* fallbacks);
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/**
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Gather information about the files with given extension and return the
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corresponding wxFileType object or @NULL if the extension is unknown.
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The @a extension parameter may have, or not, the leading dot, if it has it,
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it is stripped automatically. It must not however be empty.
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*/
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wxFileType* GetFileTypeFromExtension(const wxString& extension);
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/**
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Gather information about the files with given MIME type and return the
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corresponding wxFileType object or @NULL if the MIME type is unknown.
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*/
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wxFileType* GetFileTypeFromMimeType(const wxString& mimeType);
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/**
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This function returns @true if either the given @a mimeType is exactly
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the same as @a wildcard or if it has the same category and the subtype of
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@a wildcard is '*'. Note that the '*' wildcard is not allowed in
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@a mimeType itself.
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The comparison don by this function is case insensitive so it is not
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necessary to convert the strings to the same case before calling it.
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*/
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static bool IsOfType(const wxString& mimeType, const wxString& wildcard);
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};
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/**
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The global wxMimeTypesManager instance.
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*/
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wxMimeTypesManager* wxTheMimeTypesManager;
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/**
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@class wxFileType
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This class holds information about a given @e file type.
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File type is the same as MIME type under Unix, but under Windows it corresponds
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more to an extension than to MIME type (in fact, several extensions may
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correspond to a file type).
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This object may be created in several different ways: the program might know the
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file extension and wish to find out the corresponding MIME type or, conversely, it
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might want to find the right extension for the file to which it writes the
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contents of given MIME type. Depending on how it was created some fields may be
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unknown so the return value of all the accessors @b must be checked: @false
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will be returned if the corresponding information couldn't be found.
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The objects of this class are never created by the application code but are
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returned by wxMimeTypesManager::GetFileTypeFromMimeType and
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wxMimeTypesManager::GetFileTypeFromExtension methods.
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But it is your responsibility to delete the returned pointer when you're done
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with it!
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A brief reminder about what the MIME types are (see the RFC 1341 for more
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information): basically, it is just a pair category/type (for example,
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"text/plain") where the category is a basic indication of what a file is.
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Examples of categories are "application", "image", "text", "binary", and
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type is a precise definition of the document format: "plain" in the example
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above means just ASCII text without any formatting, while "text/html" is the
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HTML document source.
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A MIME type may have one or more associated extensions: "text/plain" will
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typically correspond to the extension ".txt", but may as well be associated with
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".ini" or ".conf".
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@section filetype_example MessageParameters class
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One of the most common usages of MIME is to encode an e-mail message.
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The MIME type of the encoded message is an example of a message parameter.
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These parameters are found in the message headers ("Content-XXX").
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At the very least, they must specify the MIME type and the version of MIME
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used, but almost always they provide additional information about the message
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such as the original file name or the charset (for the text documents).
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These parameters may be useful to the program used to open, edit, view or
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print the message, so, for example, an e-mail client program will have to
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pass them to this program. Because wxFileType itself cannot know about
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these parameters, it uses MessageParameters class to query them.
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The default implementation only requires the caller to provide the file name
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(always used by the program to be called - it must know which file to open)
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and the MIME type and supposes that there are no other parameters.
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If you wish to supply additional parameters, you must derive your own class
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from MessageParameters and override GetParamValue() function, for example:
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@code
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// provide the message parameters for the MIME type manager
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class MailMessageParameters : public wxFileType::MessageParameters
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{
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public:
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MailMessageParameters(const wxString& filename,
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const wxString& mimetype)
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: wxFileType::MessageParameters(filename, mimetype)
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{
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}
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virtual wxString GetParamValue(const wxString& name) const
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{
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// parameter names are not case-sensitive
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if ( name.CmpNoCase("charset") == 0 )
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return "US-ASCII";
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else
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return wxFileType::MessageParameters::GetParamValue(name);
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}
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};
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@endcode
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Now you only need to create an object of this class and pass it to, for example,
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GetOpenCommand like this:
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@code
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wxString command;
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if ( filetype->GetOpenCommand(&command,
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MailMessageParameters("foo.txt", "text/plain")) )
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{
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// the full command for opening the text documents is in 'command'
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// (it might be "notepad foo.txt" under Windows or "cat foo.txt" under Unix)
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}
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else
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{
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// we don't know how to handle such files...
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}
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@endcode
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Windows: As only the file name is used by the program associated with the
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given extension anyhow (but no other message parameters), there is no need
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to ever derive from MessageParameters class for a Windows-only program.
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@library{wxbase}
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@category{data}
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@see wxMimeTypesManager
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*/
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class wxFileType
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{
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private:
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/**
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The default constructor is private because you should never create objects of
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this type: they are only returned by wxMimeTypesManager methods.
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*/
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wxFileType();
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public:
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/**
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Copy ctor.
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*/
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wxFileType(const wxFileTypeInfo& ftInfo);
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/**
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The destructor of this class is not virtual, so it should not be derived from.
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*/
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~wxFileType();
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/**
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This function is primarily intended for GetOpenCommand and GetPrintCommand
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usage but may be also used by the application directly if, for example, you
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want to use some non-default command to open the file.
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The function replaces all occurrences of:
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- %s with the full file name
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- %t with the MIME type
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- %{param} with the value of the parameter @e param
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using the MessageParameters object you pass to it.
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If there is no '%s' in the command string (and the string is not empty), it is
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assumed that the command reads the data on stdin and so the effect is the same
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as " %s" were appended to the string.
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Unlike all other functions of this class, there is no error return for this
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function.
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*/
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static wxString ExpandCommand(const wxString& command,
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const MessageParameters& params);
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/**
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If the function returns @true, the string pointed to by @a desc is filled
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with a brief description for this file type: for example, "text document" for
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the "text/plain" MIME type.
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*/
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bool GetDescription(wxString* desc) const;
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/**
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If the function returns @true, the array @a extensions is filled
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with all extensions associated with this file type: for example, it may
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contain the following two elements for the MIME type "text/html"
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(notice the absence of the leading dot): "html" and "htm".
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@b Windows: This function is currently not implemented: there is no
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(efficient) way to retrieve associated extensions from the given MIME type
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on this platform, so it will only return @true if the wxFileType object was
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created by wxMimeTypesManager::GetFileTypeFromExtension function in the
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first place.
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*/
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bool GetExtensions(wxArrayString& extensions);
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/**
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If the function returns @true, the @c iconLoc is filled with the
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location of the icon for this MIME type.
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A wxIcon may be created from @a iconLoc later.
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@b Windows: The function returns the icon shown by Explorer for the files of
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the specified type.
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@b Mac: This function is not implemented and always returns @false.
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@b Unix: MIME manager gathers information about icons from GNOME
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and KDE settings and thus GetIcon's success depends on availability
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of these desktop environments.
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*/
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bool GetIcon(wxIconLocation* iconLoc) const;
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/**
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If the function returns @true, the string pointed to by @a mimeType is filled
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with full MIME type specification for this file type: for example, "text/plain".
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*/
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bool GetMimeType(wxString* mimeType) const;
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/**
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Same as GetMimeType() but returns array of MIME types.
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This array will contain only one item in most cases but sometimes,
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notably under Unix with KDE, may contain more MIME types.
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This happens when one file extension is mapped to different MIME types
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by KDE, mailcap and mime.types.
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*/
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bool GetMimeTypes(wxArrayString& mimeTypes) const;
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//@{
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/**
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With the first version of this method, if the @true is returned, the
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string pointed to by @a command is filled with the command which must be
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executed (see wxExecute()) in order to open the file of the given type.
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In this case, the name of the file as well as any other parameters
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is retrieved from MessageParameters() class.
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In the second case, only the filename is specified and the command to be used
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to open this kind of file is returned directly. An empty string is returned to
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indicate that an error occurred (typically meaning that there is no standard way
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to open this kind of files).
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*/
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bool GetOpenCommand(wxString* command, const MessageParameters& params);
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wxString GetOpenCommand(const wxString& filename) const;
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//@}
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/**
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If the function returns @true, the string pointed to by @a command is filled
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with the command which must be executed (see wxExecute()) in order to
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print the file of the given type.
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The name of the file is retrieved from the MessageParameters class.
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*/
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bool GetPrintCommand(wxString* command,
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const MessageParameters& params) const;
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};
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/**
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Container of information about wxFileType.
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This class simply stores information associated with the file type. It
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doesn't do anything on its own and is used only to allow constructing
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wxFileType from it (instead of specifying all the constituent pieces
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separately) and also with wxMimeTypesManager::AddFallbacks().
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*/
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class wxFileTypeInfo
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{
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public:
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/**
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Default constructor creates an invalid file type info object.
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Such invalid/empty object should be used to terminate the list of file
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types passed to wxMimeTypesManager::AddFallbacks().
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*/
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wxFileTypeInfo();
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/**
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Constructor specifying just the MIME type name.
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Use the various setter methods below to fully initialize the object.
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@since 2.9.2
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*/
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wxFileTypeInfo(const wxString& mimeType);
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/**
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Constructor allowing to specify all the fields at once.
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This is a vararg constructor taking an arbitrary number of extensions
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after the first four required parameters. The list must be terminated
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by @c wxNullPtr, notice that @c NULL can't be used here in portable
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code (C++0x @c nullptr can be used as well if your compiler supports
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it).
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*/
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wxFileTypeInfo(const wxString& mimeType,
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const wxString& openCmd,
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const wxString& printCmd,
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const wxString& description,
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const wxString& extension,
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...);
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/**
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Add another extension associated with this file type.
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@since 2.9.2
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*/
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void AddExtension(const wxString& ext);
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/**
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Set the file type description.
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@since 2.9.2
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*/
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void SetDescription(const wxString& description);
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/**
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Set the command to be used for opening files of this type.
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@since 2.9.2
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*/
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void SetOpenCommand(const wxString& command);
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/**
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Set the command to be used for printing files of this type.
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@since 2.9.2
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*/
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void SetPrintCommand(const wxString& command);
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/**
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Set the short description for the files of this type.
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This is only used under MSW for some of the registry keys used for the
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file type registration.
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*/
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void SetShortDesc(const wxString& shortDesc);
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};
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