185 lines
6.8 KiB
C
185 lines
6.8 KiB
C
|
/*
|
||
|
|
* tkSelect.h --
|
||
|
|
*
|
||
|
|
* Declarations of types shared among the files that implement
|
||
|
|
* selection support.
|
||
|
|
*
|
||
|
|
* Copyright (c) 1995 Sun Microsystems, Inc.
|
||
|
|
*
|
||
|
|
* See the file "license.terms" for information on usage and redistribution
|
||
|
|
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
|
||
|
|
*
|
||
|
|
* SCCS: @(#) tkSelect.h 1.4 95/11/03 13:22:41
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef _TKSELECT
|
||
|
|
#define _TKSELECT
|
||
|
|
|
||
|
|
/*
|
||
|
|
* When a selection is owned by a window on a given display, one of the
|
||
|
|
* following structures is present on a list of current selections in the
|
||
|
|
* display structure. The structure is used to record the current owner of
|
||
|
|
* a selection for use in later retrieval requests. There is a list of
|
||
|
|
* such structures because a display can have multiple different selections
|
||
|
|
* active at the same time.
|
||
|
|
*/
|
||
|
|
|
||
|
|
typedef struct TkSelectionInfo {
|
||
|
|
Atom selection; /* Selection name, e.g. XA_PRIMARY. */
|
||
|
|
Tk_Window owner; /* Current owner of this selection. */
|
||
|
|
int serial; /* Serial number of last XSelectionSetOwner
|
||
|
|
* request made to server for this
|
||
|
|
* selection (used to filter out redundant
|
||
|
|
* SelectionClear events). */
|
||
|
|
Time time; /* Timestamp used to acquire selection. */
|
||
|
|
Tk_LostSelProc *clearProc; /* Procedure to call when owner loses
|
||
|
|
* selection. */
|
||
|
|
ClientData clearData; /* Info to pass to clearProc. */
|
||
|
|
struct TkSelectionInfo *nextPtr;
|
||
|
|
/* Next in list of current selections on
|
||
|
|
* this display. NULL means end of list */
|
||
|
|
} TkSelectionInfo;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* One of the following structures exists for each selection handler
|
||
|
|
* created for a window by calling Tk_CreateSelHandler. The handlers
|
||
|
|
* are linked in a list rooted in the TkWindow structure.
|
||
|
|
*/
|
||
|
|
|
||
|
|
typedef struct TkSelHandler {
|
||
|
|
Atom selection; /* Selection name, e.g. XA_PRIMARY */
|
||
|
|
Atom target; /* Target type for selection
|
||
|
|
* conversion, such as TARGETS or
|
||
|
|
* STRING. */
|
||
|
|
Atom format; /* Format in which selection
|
||
|
|
* info will be returned, such
|
||
|
|
* as STRING or ATOM. */
|
||
|
|
Tk_SelectionProc *proc; /* Procedure to generate selection
|
||
|
|
* in this format. */
|
||
|
|
ClientData clientData; /* Argument to pass to proc. */
|
||
|
|
int size; /* Size of units returned by proc
|
||
|
|
* (8 for STRING, 32 for almost
|
||
|
|
* anything else). */
|
||
|
|
struct TkSelHandler *nextPtr;
|
||
|
|
/* Next selection handler associated
|
||
|
|
* with same window (NULL for end of
|
||
|
|
* list). */
|
||
|
|
} TkSelHandler;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* When the selection is being retrieved, one of the following
|
||
|
|
* structures is present on a list of pending selection retrievals.
|
||
|
|
* The structure is used to communicate between the background
|
||
|
|
* procedure that requests the selection and the foreground
|
||
|
|
* event handler that processes the events in which the selection
|
||
|
|
* is returned. There is a list of such structures so that there
|
||
|
|
* can be multiple simultaneous selection retrievals (e.g. on
|
||
|
|
* different displays).
|
||
|
|
*/
|
||
|
|
|
||
|
|
typedef struct TkSelRetrievalInfo {
|
||
|
|
Tcl_Interp *interp; /* Interpreter for error reporting. */
|
||
|
|
TkWindow *winPtr; /* Window used as requestor for
|
||
|
|
* selection. */
|
||
|
|
Atom selection; /* Selection being requested. */
|
||
|
|
Atom property; /* Property where selection will appear. */
|
||
|
|
Atom target; /* Desired form for selection. */
|
||
|
|
int (*proc) _ANSI_ARGS_((ClientData clientData, Tcl_Interp *interp,
|
||
|
|
char *portion)); /* Procedure to call to handle pieces
|
||
|
|
* of selection. */
|
||
|
|
ClientData clientData; /* Argument for proc. */
|
||
|
|
int result; /* Initially -1. Set to a Tcl
|
||
|
|
* return value once the selection
|
||
|
|
* has been retrieved. */
|
||
|
|
Tcl_TimerToken timeout; /* Token for current timeout procedure. */
|
||
|
|
int idleTime; /* Number of seconds that have gone by
|
||
|
|
* without hearing anything from the
|
||
|
|
* selection owner. */
|
||
|
|
struct TkSelRetrievalInfo *nextPtr;
|
||
|
|
/* Next in list of all pending
|
||
|
|
* selection retrievals. NULL means
|
||
|
|
* end of list. */
|
||
|
|
} TkSelRetrievalInfo;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* The clipboard contains a list of buffers of various types and formats.
|
||
|
|
* All of the buffers of a given type will be returned in sequence when the
|
||
|
|
* CLIPBOARD selection is retrieved. All buffers of a given type on the
|
||
|
|
* same clipboard must have the same format. The TkClipboardTarget structure
|
||
|
|
* is used to record the information about a chain of buffers of the same
|
||
|
|
* type.
|
||
|
|
*/
|
||
|
|
|
||
|
|
typedef struct TkClipboardBuffer {
|
||
|
|
char *buffer; /* Null terminated data buffer. */
|
||
|
|
long length; /* Length of string in buffer. */
|
||
|
|
struct TkClipboardBuffer *nextPtr; /* Next in list of buffers. NULL
|
||
|
|
* means end of list . */
|
||
|
|
} TkClipboardBuffer;
|
||
|
|
|
||
|
|
typedef struct TkClipboardTarget {
|
||
|
|
Atom type; /* Type conversion supported. */
|
||
|
|
Atom format; /* Representation used for data. */
|
||
|
|
TkClipboardBuffer *firstBufferPtr; /* First in list of data buffers. */
|
||
|
|
TkClipboardBuffer *lastBufferPtr; /* Last in list of clipboard buffers.
|
||
|
|
* Used to speed up appends. */
|
||
|
|
struct TkClipboardTarget *nextPtr; /* Next in list of targets on
|
||
|
|
* clipboard. NULL means end of
|
||
|
|
* list. */
|
||
|
|
} TkClipboardTarget;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* It is possible for a Tk_SelectionProc to delete the handler that it
|
||
|
|
* represents. If this happens, the code that is retrieving the selection
|
||
|
|
* needs to know about it so it doesn't use the now-defunct handler
|
||
|
|
* structure. One structure of the following form is created for each
|
||
|
|
* retrieval in progress, so that the retriever can find out if its
|
||
|
|
* handler is deleted. All of the pending retrievals (if there are more
|
||
|
|
* than one) are linked into a list.
|
||
|
|
*/
|
||
|
|
|
||
|
|
typedef struct TkSelInProgress {
|
||
|
|
TkSelHandler *selPtr; /* Handler being executed. If this handler
|
||
|
|
* is deleted, the field is set to NULL. */
|
||
|
|
struct TkSelInProgress *nextPtr;
|
||
|
|
/* Next higher nested search. */
|
||
|
|
} TkSelInProgress;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Declarations for variables shared among the selection-related files:
|
||
|
|
*/
|
||
|
|
|
||
|
|
extern TkSelInProgress *pendingPtr;
|
||
|
|
/* Topmost search in progress, or
|
||
|
|
* NULL if none. */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Chunk size for retrieving selection. It's defined both in
|
||
|
|
* words and in bytes; the word size is used to allocate
|
||
|
|
* buffer space that's guaranteed to be word-aligned and that
|
||
|
|
* has an extra character for the terminating NULL.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#define TK_SEL_BYTES_AT_ONCE 4000
|
||
|
|
#define TK_SEL_WORDS_AT_ONCE 1001
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Declarations for procedures that are used by the selection-related files
|
||
|
|
* but shouldn't be used anywhere else in Tk (or by Tk clients):
|
||
|
|
*/
|
||
|
|
|
||
|
|
extern void TkSelClearSelection _ANSI_ARGS_((Tk_Window tkwin,
|
||
|
|
XEvent *eventPtr));
|
||
|
|
extern int TkSelDefaultSelection _ANSI_ARGS_((
|
||
|
|
TkSelectionInfo *infoPtr, Atom target,
|
||
|
|
char *buffer, int maxBytes, Atom *typePtr));
|
||
|
|
extern int TkSelGetSelection _ANSI_ARGS_((Tcl_Interp *interp,
|
||
|
|
Tk_Window tkwin, Atom selection, Atom target,
|
||
|
|
Tk_GetSelProc *proc, ClientData clientData));
|
||
|
|
#ifndef TkSelUpdateClipboard
|
||
|
|
extern void TkSelUpdateClipboard _ANSI_ARGS_((TkWindow *winPtr,
|
||
|
|
TkClipboardTarget *targetPtr));
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif /* _TKSELECT */
|