cpython-source-deps/unix/tkUnixSysNotify.c at tk · python/cpython-source-deps · GitHub

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* tkUnixSysNotify.c --

* tkUnixSysNotify.c implements a "sysnotify" Tcl command which

* permits one to post system notifications based on the libnotify API.

* See the file "license.terms" for information on usage and redistribution of

* this file, and for a DISCLAIMER OF ALL WARRANTIES.

#include "tkInt.h"

#include "tkUnixInt.h"

* Runtime linking of libnotify.

typedef int (*fn_ln_init)(const char *);

typedef void (*fn_ln_uninit)(void);

typedef void * (*fn_ln_notification_new)(const char *, const char *,

const char *, void *);

typedef int (*fn_ln_notification_show)(void *, int *);

static struct {

int nopen;

Tcl_LoadHandle lib;

fn_ln_init init;

fn_ln_uninit uninit;

fn_ln_notification_new notification_new;

fn_ln_notification_show notification_show;

} ln_fns = {

0, NULL, NULL, NULL, NULL, NULL

};

#define notify_init ln_fns.init

#define notify_uninit ln_fns.uninit

#define notify_notification_new ln_fns.notification_new

#define notify_notification_show ln_fns.notification_show

TCL_DECLARE_MUTEX(ln_mutex);

* Forward declarations for procedures defined in this file.

static Tcl_CmdDeleteProc SysNotifyDeleteCmd;

static Tcl_ObjCmdProc SysNotifyCmd;

*----------------------------------------------------------------------

* SysNotifyDeleteCmd --

* Delete notification and clean up.

* Results:

* Window destroyed.

* Side effects:

* None.

*----------------------------------------------------------------------

static void

SysNotifyDeleteCmd (

TCL_UNUSED(void *))

{

Tcl_MutexLock(&ln_mutex);

if (--ln_fns.nopen == 0) {

if (notify_uninit) {

notify_uninit();

}

if (ln_fns.lib != NULL) {

Tcl_FSUnloadFile(NULL, ln_fns.lib);

}

memset(&ln_fns, 0, sizeof(ln_fns));

}

Tcl_MutexUnlock(&ln_mutex);

}

*----------------------------------------------------------------------

* SysNotifyCreateCmd --

* Create tray command and (unreal) window.

* Results:

* Icon tray and hidden window created.

* Side effects:

* None.

*----------------------------------------------------------------------

static int

SysNotifyCmd(

TCL_UNUSED(void *),

Tcl_Interp *interp,

int objc,

Tcl_Obj *const *objv)

{

const char *title;

const char *message;

const char *icon;

const char *appname = "Wish";

void *notif;

if (objc < 3) {

Tcl_WrongNumArgs(interp, 1, objv, "title message");

return TCL_ERROR;

}

* Pass strings to notification, and use a sane platform-specific

* icon in the alert.

title = Tcl_GetString(objv[1]);

message = Tcl_GetString(objv[2]);

icon = "dialog-information";

/* Use the appname for libnotify initialization

* See bug f63c37be3a for a discussion whether this should be

* allowed at all on safe interpreters

if (!Tcl_IsSafe(interp)) {

appname = ((TkWindow *)Tk_MainWindow(interp))->nameUid;

}

* Call to notify_init should go here to prevent test suite failure.

if (notify_init && notify_notification_new && notify_notification_show) {

Tcl_Encoding enc;

Tcl_DString dst, dsm;

Tcl_DStringInit(&dst);

Tcl_DStringInit(&dsm);

enc = Tcl_GetEncoding(NULL, "utf-8");

char *dstStr = Tcl_UtfToExternalDString(enc, title, TCL_INDEX_NONE, &dst);

char *dsmStr = Tcl_UtfToExternalDString(enc, message, TCL_INDEX_NONE, &dsm);

notify_init(appname);

notif = notify_notification_new(dstStr, dsmStr, icon, NULL);

notify_notification_show(notif, NULL);

Tcl_DStringFree(&dsm);

Tcl_DStringFree(&dst);

Tcl_FreeEncoding(enc);

}

return TCL_OK;

}

*----------------------------------------------------------------------

* SysNotify_Init --

* Initialize the command.

* Results:

* Command initialized.

* Side effects:

* None.

*----------------------------------------------------------------------

int

SysNotify_Init(

Tcl_Interp *interp)

{

Tcl_MutexLock(&ln_mutex);

if (ln_fns.nopen == 0) {

int i = 0;

Tcl_Obj *nameobj;

static const char *lnlibs[] = {

"libnotify.so.4",

"libnotify.so.3",

"libnotify.so.2",

"libnotify.so.1",

"libnotify.so",

NULL

};

while (lnlibs[i] != NULL) {

Tcl_ResetResult(interp);

nameobj = Tcl_NewStringObj(lnlibs[i], TCL_INDEX_NONE);

Tcl_IncrRefCount(nameobj);

if (Tcl_LoadFile(interp, nameobj, NULL, 0, NULL, &ln_fns.lib)

== TCL_OK) {

Tcl_DecrRefCount(nameobj);

break;

}

Tcl_DecrRefCount(nameobj);

++i;

}

if (ln_fns.lib != NULL) {

#define LN_SYM(name) \

ln_fns.name = (fn_ln_ ## name) \

Tcl_FindSymbol(NULL, ln_fns.lib, "notify_" #name)

LN_SYM(init);

LN_SYM(uninit);

LN_SYM(notification_new);

LN_SYM(notification_show);

#undef LN_SYM

}

ln_fns.nopen++;

Tcl_MutexUnlock(&ln_mutex);

if (!notify_init) return TCL_OK;

Tcl_CreateObjCommand(interp, "::tk::sysnotify::_sysnotify", SysNotifyCmd,

interp, SysNotifyDeleteCmd);

return TCL_OK;

}

* Local Variables:

* mode: c

* c-basic-offset: 4

* fill-column: 78

* coding: utf-8

* End:

cpython-source-deps/unix/tkUnixSysNotify.c at tk · python/cpython-source-deps · GitHub

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