mirror of https://github.com/libsdl-org/SDL
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
332 lines
12 KiB
C
332 lines
12 KiB
C
/*
|
|
Simple DirectMedia Layer
|
|
Copyright (C) 1997-2024 Sam Lantinga <slouken@libsdl.org>
|
|
|
|
This software is provided 'as-is', without any express or implied
|
|
warranty. In no event will the authors be held liable for any damages
|
|
arising from the use of this software.
|
|
|
|
Permission is granted to anyone to use this software for any purpose,
|
|
including commercial applications, and to alter it and redistribute it
|
|
freely, subject to the following restrictions:
|
|
|
|
1. The origin of this software must not be misrepresented; you must not
|
|
claim that you wrote the original software. If you use this software
|
|
in a product, an acknowledgment in the product documentation would be
|
|
appreciated but is not required.
|
|
2. Altered source versions must be plainly marked as such, and must not be
|
|
misrepresented as being the original software.
|
|
3. This notice may not be removed or altered from any source distribution.
|
|
*/
|
|
|
|
/**
|
|
* # CategoryClipboard
|
|
*
|
|
* SDL provides access to the system clipboard, both for reading information
|
|
* from other processes and publishing information of its own.
|
|
*
|
|
* This is not just text! SDL apps can access and publish data by mimetype.
|
|
*
|
|
* ## Basic use (text)
|
|
*
|
|
* Obtaining and publishing simple text to the system clipboard is as easy as
|
|
* calling SDL_GetClipboardText() and SDL_SetClipboardText(), respectively.
|
|
* These deal with C strings in UTF-8 encoding. Data transmission and encoding
|
|
* conversion is completely managed by SDL.
|
|
*
|
|
* ## Clipboard callbacks (data other than text)
|
|
*
|
|
* Things get more complicated when the clipboard contains something other
|
|
* than text. Not only can the system clipboard contain data of any type, in
|
|
* some cases it can contain the same data in different formats! For example,
|
|
* an image painting app might let the user copy a graphic to the clipboard,
|
|
* and offers it in .BMP, .JPG, or .PNG format for other apps to consume.
|
|
*
|
|
* Obtaining clipboard data ("pasting") like this is a matter of calling
|
|
* SDL_GetClipboardData() and telling it the mimetype of the data you want.
|
|
* But how does one know if that format is available? SDL_HasClipboardData()
|
|
* can report if a specific mimetype is offered, and
|
|
* SDL_GetClipboardMimeTypes() can provide the entire list of mimetypes
|
|
* available, so the app can decide what to do with the data and what formats
|
|
* it can support.
|
|
*
|
|
* Setting the clipboard ("copying") to arbitrary data is done with
|
|
* SDL_SetClipboardData. The app does not provide the data in this call, but
|
|
* rather the mimetypes it is willing to provide and a callback function.
|
|
* During the callback, the app will generate the data. This allows massive
|
|
* data sets to be provided to the clipboard, without any data being copied
|
|
* before it is explicitly requested. More specifically, it allows an app to
|
|
* offer data in multiple formats without providing a copy of all of them
|
|
* upfront. If the app has an image that it could provide in PNG or JPG
|
|
* format, it doesn't have to encode it to either of those unless and until
|
|
* something tries to paste it.
|
|
*
|
|
* ## Primary Selection
|
|
*
|
|
* The X11 and Wayland video targets have a concept of the "primary selection"
|
|
* in addition to the usual clipboard. This is generally highlighted (but not
|
|
* explicitly copied) text from various apps. SDL offers APIs for this through
|
|
* SDL_GetPrimarySelectionText() and SDL_SetPrimarySelectionText(). SDL offers
|
|
* these APIs on platforms without this concept, too, but only so far that it
|
|
* will keep a copy of a string that the app sets for later retrieval; the
|
|
* operating system will not ever attempt to change the string externally if
|
|
* it doesn't support a primary selection.
|
|
*/
|
|
|
|
#ifndef SDL_clipboard_h_
|
|
#define SDL_clipboard_h_
|
|
|
|
#include <SDL3/SDL_stdinc.h>
|
|
#include <SDL3/SDL_error.h>
|
|
|
|
#include <SDL3/SDL_begin_code.h>
|
|
/* Set up for C function definitions, even when using C++ */
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/* Function prototypes */
|
|
|
|
/**
|
|
* Put UTF-8 text into the clipboard.
|
|
*
|
|
* \param text the text to store in the clipboard.
|
|
* \returns true on success or false on failure; call SDL_GetError() for more
|
|
* information.
|
|
*
|
|
* \threadsafety This function should only be called on the main thread.
|
|
*
|
|
* \since This function is available since SDL 3.1.3.
|
|
*
|
|
* \sa SDL_GetClipboardText
|
|
* \sa SDL_HasClipboardText
|
|
*/
|
|
extern SDL_DECLSPEC bool SDLCALL SDL_SetClipboardText(const char *text);
|
|
|
|
/**
|
|
* Get UTF-8 text from the clipboard.
|
|
*
|
|
* This functions returns an empty string if there was not enough memory left
|
|
* for a copy of the clipboard's content.
|
|
*
|
|
* \returns the clipboard text on success or an empty string on failure; call
|
|
* SDL_GetError() for more information. This should be freed with
|
|
* SDL_free() when it is no longer needed.
|
|
*
|
|
* \threadsafety This function should only be called on the main thread.
|
|
*
|
|
* \since This function is available since SDL 3.1.3.
|
|
*
|
|
* \sa SDL_HasClipboardText
|
|
* \sa SDL_SetClipboardText
|
|
*/
|
|
extern SDL_DECLSPEC char * SDLCALL SDL_GetClipboardText(void);
|
|
|
|
/**
|
|
* Query whether the clipboard exists and contains a non-empty text string.
|
|
*
|
|
* \returns true if the clipboard has text, or false if it does not.
|
|
*
|
|
* \threadsafety This function should only be called on the main thread.
|
|
*
|
|
* \since This function is available since SDL 3.1.3.
|
|
*
|
|
* \sa SDL_GetClipboardText
|
|
* \sa SDL_SetClipboardText
|
|
*/
|
|
extern SDL_DECLSPEC bool SDLCALL SDL_HasClipboardText(void);
|
|
|
|
/**
|
|
* Put UTF-8 text into the primary selection.
|
|
*
|
|
* \param text the text to store in the primary selection.
|
|
* \returns true on success or false on failure; call SDL_GetError() for more
|
|
* information.
|
|
*
|
|
* \threadsafety This function should only be called on the main thread.
|
|
*
|
|
* \since This function is available since SDL 3.1.3.
|
|
*
|
|
* \sa SDL_GetPrimarySelectionText
|
|
* \sa SDL_HasPrimarySelectionText
|
|
*/
|
|
extern SDL_DECLSPEC bool SDLCALL SDL_SetPrimarySelectionText(const char *text);
|
|
|
|
/**
|
|
* Get UTF-8 text from the primary selection.
|
|
*
|
|
* This functions returns an empty string if there was not enough memory left
|
|
* for a copy of the primary selection's content.
|
|
*
|
|
* \returns the primary selection text on success or an empty string on
|
|
* failure; call SDL_GetError() for more information. This should be
|
|
* freed with SDL_free() when it is no longer needed.
|
|
*
|
|
* \threadsafety This function should only be called on the main thread.
|
|
*
|
|
* \since This function is available since SDL 3.1.3.
|
|
*
|
|
* \sa SDL_HasPrimarySelectionText
|
|
* \sa SDL_SetPrimarySelectionText
|
|
*/
|
|
extern SDL_DECLSPEC char * SDLCALL SDL_GetPrimarySelectionText(void);
|
|
|
|
/**
|
|
* Query whether the primary selection exists and contains a non-empty text
|
|
* string.
|
|
*
|
|
* \returns true if the primary selection has text, or false if it does not.
|
|
*
|
|
* \threadsafety This function should only be called on the main thread.
|
|
*
|
|
* \since This function is available since SDL 3.1.3.
|
|
*
|
|
* \sa SDL_GetPrimarySelectionText
|
|
* \sa SDL_SetPrimarySelectionText
|
|
*/
|
|
extern SDL_DECLSPEC bool SDLCALL SDL_HasPrimarySelectionText(void);
|
|
|
|
/**
|
|
* Callback function that will be called when data for the specified mime-type
|
|
* is requested by the OS.
|
|
*
|
|
* The callback function is called with NULL as the mime_type when the
|
|
* clipboard is cleared or new data is set. The clipboard is automatically
|
|
* cleared in SDL_Quit().
|
|
*
|
|
* \param userdata a pointer to provided user data.
|
|
* \param mime_type the requested mime-type.
|
|
* \param size a pointer filled in with the length of the returned data.
|
|
* \returns a pointer to the data for the provided mime-type. Returning NULL
|
|
* or setting length to 0 will cause no data to be sent to the
|
|
* "receiver". It is up to the receiver to handle this. Essentially
|
|
* returning no data is more or less undefined behavior and may cause
|
|
* breakage in receiving applications. The returned data will not be
|
|
* freed so it needs to be retained and dealt with internally.
|
|
*
|
|
* \since This function is available since SDL 3.1.3.
|
|
*
|
|
* \sa SDL_SetClipboardData
|
|
*/
|
|
typedef const void *(SDLCALL *SDL_ClipboardDataCallback)(void *userdata, const char *mime_type, size_t *size);
|
|
|
|
/**
|
|
* Callback function that will be called when the clipboard is cleared, or new
|
|
* data is set.
|
|
*
|
|
* \param userdata a pointer to provided user data.
|
|
*
|
|
* \since This function is available since SDL 3.1.3.
|
|
*
|
|
* \sa SDL_SetClipboardData
|
|
*/
|
|
typedef void (SDLCALL *SDL_ClipboardCleanupCallback)(void *userdata);
|
|
|
|
/**
|
|
* Offer clipboard data to the OS.
|
|
*
|
|
* Tell the operating system that the application is offering clipboard data
|
|
* for each of the provided mime-types. Once another application requests the
|
|
* data the callback function will be called, allowing it to generate and
|
|
* respond with the data for the requested mime-type.
|
|
*
|
|
* The size of text data does not include any terminator, and the text does
|
|
* not need to be null terminated (e.g. you can directly copy a portion of a
|
|
* document).
|
|
*
|
|
* \param callback a function pointer to the function that provides the
|
|
* clipboard data.
|
|
* \param cleanup a function pointer to the function that cleans up the
|
|
* clipboard data.
|
|
* \param userdata an opaque pointer that will be forwarded to the callbacks.
|
|
* \param mime_types a list of mime-types that are being offered.
|
|
* \param num_mime_types the number of mime-types in the mime_types list.
|
|
* \returns true on success or false on failure; call SDL_GetError() for more
|
|
* information.
|
|
*
|
|
* \threadsafety This function should only be called on the main thread.
|
|
*
|
|
* \since This function is available since SDL 3.1.3.
|
|
*
|
|
* \sa SDL_ClearClipboardData
|
|
* \sa SDL_GetClipboardData
|
|
* \sa SDL_HasClipboardData
|
|
*/
|
|
extern SDL_DECLSPEC bool SDLCALL SDL_SetClipboardData(SDL_ClipboardDataCallback callback, SDL_ClipboardCleanupCallback cleanup, void *userdata, const char **mime_types, size_t num_mime_types);
|
|
|
|
/**
|
|
* Clear the clipboard data.
|
|
*
|
|
* \returns true on success or false on failure; call SDL_GetError() for more
|
|
* information.
|
|
*
|
|
* \threadsafety This function should only be called on the main thread.
|
|
*
|
|
* \since This function is available since SDL 3.1.3.
|
|
*
|
|
* \sa SDL_SetClipboardData
|
|
*/
|
|
extern SDL_DECLSPEC bool SDLCALL SDL_ClearClipboardData(void);
|
|
|
|
/**
|
|
* Get the data from clipboard for a given mime type.
|
|
*
|
|
* The size of text data does not include the terminator, but the text is
|
|
* guaranteed to be null terminated.
|
|
*
|
|
* \param mime_type the mime type to read from the clipboard.
|
|
* \param size a pointer filled in with the length of the returned data.
|
|
* \returns the retrieved data buffer or NULL on failure; call SDL_GetError()
|
|
* for more information. This should be freed with SDL_free() when it
|
|
* is no longer needed.
|
|
*
|
|
* \threadsafety This function should only be called on the main thread.
|
|
*
|
|
* \since This function is available since SDL 3.1.3.
|
|
*
|
|
* \sa SDL_HasClipboardData
|
|
* \sa SDL_SetClipboardData
|
|
*/
|
|
extern SDL_DECLSPEC void * SDLCALL SDL_GetClipboardData(const char *mime_type, size_t *size);
|
|
|
|
/**
|
|
* Query whether there is data in the clipboard for the provided mime type.
|
|
*
|
|
* \param mime_type the mime type to check for data for.
|
|
* \returns true if there exists data in clipboard for the provided mime type,
|
|
* false if it does not.
|
|
*
|
|
* \threadsafety This function should only be called on the main thread.
|
|
*
|
|
* \since This function is available since SDL 3.1.3.
|
|
*
|
|
* \sa SDL_SetClipboardData
|
|
* \sa SDL_GetClipboardData
|
|
*/
|
|
extern SDL_DECLSPEC bool SDLCALL SDL_HasClipboardData(const char *mime_type);
|
|
|
|
/**
|
|
* Retrieve the list of mime types available in the clipboard.
|
|
*
|
|
* \param num_mime_types a pointer filled with the number of mime types, may
|
|
* be NULL.
|
|
* \returns a null terminated array of strings with mime types, or NULL on
|
|
* failure; call SDL_GetError() for more information. This should be
|
|
* freed with SDL_free() when it is no longer needed.
|
|
*
|
|
* \threadsafety This function should only be called on the main thread.
|
|
*
|
|
* \since This function is available since SDL 3.1.3.
|
|
*
|
|
* \sa SDL_SetClipboardData
|
|
*/
|
|
extern SDL_DECLSPEC char ** SDLCALL SDL_GetClipboardMimeTypes(size_t *num_mime_types);
|
|
|
|
/* Ends C function definitions when using C++ */
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
#include <SDL3/SDL_close_code.h>
|
|
|
|
#endif /* SDL_clipboard_h_ */
|