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dtwm: Add a function: GetHeadInfoById.

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This commit is contained in:
Liang Chang 2021-08-05 17:09:35 +08:00
parent 1f59b5150a
commit bcf6e517d3
2 changed files with 57 additions and 0 deletions
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56
cde/programs/dtwm/WmMultiHead.c
View file

@ -113,3 +113,59 @@ WmHeadInfo_t *GetHeadInfo(const ClientData *pcd) {
/* No valid screen */
return NULL;
}
/*************************************<->*************************************
*
* GetHeadInfoById (id)
*
*
* Description:
* -----------
* Search for the head by ID.
*
*
* Inputs:
* ------
*
*
* Outputs:
* -------
* Return = head metrics on success, NULL on failure.
*
*
* Comments:
* --------
*
* Can fail if:
*
* - MultiHead(eg. Xinerama) is not active
* - malloc error
* - id is less than 0
*
*************************************<->***********************************/
WmHeadInfo_t *GetHeadInfoById(int id) {
WmHeadInfo_t *WmHI = NULL;
if (!DtXI)
DtXI = _DtXineramaInit(DISPLAY);
if (id < 0 || !DtXI)
return NULL;
if (!(WmHI = (WmHeadInfo_t *)malloc(sizeof(WmHeadInfo_t)))) {
#ifdef DEBUG
fprintf(stderr, "(dtwm) _GetHeadInfoById: malloc failed\n");
#endif
free(DtXI);
return NULL;
}
if (_DtXineramaGetScreen(DtXI, id,
&WmHI->width, &WmHI->height, &WmHI->x_org, &WmHI->y_org))
return WmHI;
free(WmHI);
return NULL;
}

1
cde/programs/dtwm/WmMultiHead.h
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@ -33,5 +33,6 @@ typedef struct _WmHeadInfo {
} WmHeadInfo_t, *WmHeadInfoPtr_t;
WmHeadInfo_t *GetHeadInfo(const ClientData *pcd);
WmHeadInfo_t *GetHeadInfoById(int id);
#endif /* _WmMultiHead_h */