521 lines
13 KiB
C
521 lines
13 KiB
C
/* $Xorg: dsimple.c,v 1.4 2001/02/09 02:05:54 xorgcvs Exp $ */
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/*
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Copyright 1993, 1998 The Open Group
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Permission to use, copy, modify, distribute, and sell this software and its
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documentation for any purpose is hereby granted without fee, provided that
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the above copyright notice appear in all copies and that both that
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copyright notice and this permission notice appear in supporting
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documentation.
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The above copyright notice and this permission notice shall be included
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in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR
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OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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OTHER DEALINGS IN THE SOFTWARE.
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Except as contained in this notice, the name of The Open Group shall
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not be used in advertising or otherwise to promote the sale, use or
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other dealings in this Software without prior written authorization
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from The Open Group.
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*/
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/* $XFree86: xc/programs/xlsfonts/dsimple.c,v 3.6 2001/12/14 20:02:09 dawes Exp $ */
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#include <X11/Xos.h>
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#include <X11/Xlib.h>
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#include <X11/Xutil.h>
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#include <X11/cursorfont.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdarg.h>
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/*
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* Other_stuff.h: Definitions of routines in other_stuff.
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*
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* Written by Mark Lillibridge. Last updated 7/1/87
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*/
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#include "dsimple.h"
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/*
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* Just_display: A group of routines designed to make the writting of simple
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* X11 applications which open a display but do not open
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* any windows much faster and easier. Unless a routine says
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* otherwise, it may be assumed to require program_name, dpy,
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* and screen already defined on entry.
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*
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* Written by Mark Lillibridge. Last updated 7/1/87
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*/
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/* This stuff is defined in the calling program by just_display.h */
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char *program_name = "unknown_program";
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Display *dpy;
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int screen;
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static void _bitmap_error(int, char *);
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/*
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* Malloc: like malloc but handles out of memory using Fatal_Error.
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*/
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char *Malloc(size)
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unsigned size;
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{
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char *data;
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if (!(data = malloc(size)))
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Fatal_Error("Out of memory!");
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return(data);
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}
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/*
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* Realloc: like Malloc except for realloc, handles NULL using Malloc.
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*/
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char *Realloc(ptr, size)
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char *ptr;
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int size;
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{
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char *new_ptr;
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if (!ptr)
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return(Malloc(size));
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if (!(new_ptr = realloc(ptr, size)))
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Fatal_Error("Out of memory!");
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return(new_ptr);
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}
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/*
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* Get_Display_Name (argc, argv) Look for -display, -d, or host:dpy (obselete)
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* If found, remove it from command line. Don't go past a lone -.
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*/
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char *Get_Display_Name(pargc, argv)
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int *pargc; /* MODIFIED */
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char **argv; /* MODIFIED */
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{
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int argc = *pargc;
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char **pargv = argv+1;
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char *displayname = NULL;
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int i;
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for (i = 1; i < argc; i++) {
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char *arg = argv[i];
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if (!strcmp (arg, "-display") || !strcmp (arg, "-d")) {
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if (++i >= argc) usage ();
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displayname = argv[i];
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*pargc -= 2;
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continue;
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}
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if (!strcmp(arg,"-")) {
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while (i<argc)
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*pargv++ = argv[i++];
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break;
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}
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*pargv++ = arg;
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}
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*pargv = NULL;
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return (displayname);
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}
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/*
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* Open_Display: Routine to open a display with correct error handling.
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* Does not require dpy or screen defined on entry.
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*/
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Display *Open_Display(display_name)
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char *display_name;
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{
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Display *d;
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d = XOpenDisplay(display_name);
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if (d == NULL) {
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fprintf (stderr, "%s: unable to open display '%s'\n",
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program_name, XDisplayName (display_name));
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usage ();
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/* doesn't return */
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}
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return(d);
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}
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/*
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* Setup_Display_And_Screen: This routine opens up the correct display (i.e.,
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* it calls Get_Display_Name) and then stores a
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* pointer to it in dpy. The default screen
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* for this display is then stored in screen.
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* Does not require dpy or screen defined.
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*/
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void Setup_Display_And_Screen(argc, argv)
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int *argc; /* MODIFIED */
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char **argv; /* MODIFIED */
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{
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dpy = Open_Display (Get_Display_Name(argc, argv));
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screen = DefaultScreen(dpy);
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}
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/*
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* Open_Font: This routine opens a font with error handling.
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*/
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XFontStruct *Open_Font(name)
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char *name;
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{
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XFontStruct *font;
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if (!(font=XLoadQueryFont(dpy, name)))
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Fatal_Error("Unable to open font %s!", name);
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return(font);
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}
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/*
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* Beep: Routine to beep the display.
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*/
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void Beep()
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{
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XBell(dpy, 50);
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}
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/*
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* ReadBitmapFile: same as XReadBitmapFile except it returns the bitmap
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* directly and handles errors using Fatal_Error.
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*/
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static void _bitmap_error(status, filename)
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int status;
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char *filename;
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{
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if (status == BitmapOpenFailed)
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Fatal_Error("Can't open file %s!", filename);
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else if (status == BitmapFileInvalid)
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Fatal_Error("file %s: Bad bitmap format.", filename);
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else
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Fatal_Error("Out of memory!");
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}
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Pixmap ReadBitmapFile(d, filename, width, height, x_hot, y_hot)
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Drawable d;
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char *filename;
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int *width, *height, *x_hot, *y_hot;
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{
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Pixmap bitmap;
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int status;
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status = XReadBitmapFile(dpy, RootWindow(dpy, screen), filename,
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(unsigned int *)width, (unsigned int *)height,
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&bitmap, x_hot, y_hot);
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if (status != BitmapSuccess)
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_bitmap_error(status, filename);
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return(bitmap);
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}
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/*
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* WriteBitmapFile: same as XWriteBitmapFile except it handles errors
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* using Fatal_Error.
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*/
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void WriteBitmapFile(filename, bitmap, width, height, x_hot, y_hot)
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char *filename;
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Pixmap bitmap;
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int width, height, x_hot, y_hot;
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{
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int status;
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status= XWriteBitmapFile(dpy, filename, bitmap, width, height, x_hot,
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y_hot);
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if (status != BitmapSuccess)
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_bitmap_error(status, filename);
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}
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/*
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* Select_Window_Args: a rountine to provide a common interface for
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* applications that need to allow the user to select one
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* window on the screen for special consideration.
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* This routine implements the following command line
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* arguments:
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*
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* -root Selects the root window.
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* -id <id> Selects window with id <id>. <id> may
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* be either in decimal or hex.
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* -name <name> Selects the window with name <name>.
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*
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* Call as Select_Window_Args(&argc, argv) in main before
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* parsing any of your program's command line arguments.
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* Select_Window_Args will remove its arguments so that
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* your program does not have to worry about them.
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* The window returned is the window selected or 0 if
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* none of the above arguments was present. If 0 is
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* returned, Select_Window should probably be called after
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* all command line arguments, and other setup is done.
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* For examples of usage, see xwininfo, xwd, or xprop.
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*/
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Window Select_Window_Args(rargc, argv)
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int *rargc;
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char **argv;
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#define ARGC (*rargc)
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{
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int nargc=1;
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int argc;
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char **nargv;
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Window w=0;
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nargv = argv+1; argc = ARGC;
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#define OPTION argv[0]
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#define NXTOPTP ++argv, --argc>0
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#define NXTOPT if (++argv, --argc==0) usage()
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#define COPYOPT nargv++[0]=OPTION, nargc++
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while (NXTOPTP) {
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if (!strcmp(OPTION, "-")) {
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COPYOPT;
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while (NXTOPTP)
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COPYOPT;
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break;
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}
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if (!strcmp(OPTION, "-root")) {
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w=RootWindow(dpy, screen);
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continue;
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}
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if (!strcmp(OPTION, "-name")) {
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NXTOPT;
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w = Window_With_Name(dpy, RootWindow(dpy, screen),
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OPTION);
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if (!w)
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Fatal_Error("No window with name %s exists!",OPTION);
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continue;
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}
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if (!strcmp(OPTION, "-id")) {
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NXTOPT;
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w=0;
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sscanf(OPTION, "0x%lx", &w);
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if (!w)
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sscanf(OPTION, "%ld", &w);
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if (!w)
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Fatal_Error("Invalid window id format: %s.", OPTION);
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continue;
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}
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COPYOPT;
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}
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ARGC = nargc;
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return(w);
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}
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/*
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* Other_stuff: A group of routines which do common X11 tasks.
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*
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* Written by Mark Lillibridge. Last updated 7/1/87
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*/
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/*
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* Resolve_Color: This routine takes a color name and returns the pixel #
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* that when used in the window w will be of color name.
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* (WARNING: The colormap of w MAY be modified! )
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* If colors are run out of, only the first n colors will be
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* as correct as the hardware can make them where n depends
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* on the display. This routine does not require wind to
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* be defined.
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*/
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unsigned long Resolve_Color(w, name)
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Window w;
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char *name;
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{
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XColor c;
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Colormap colormap;
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XWindowAttributes wind_info;
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/*
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* The following is a hack to insure machines without a rgb table
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* handle at least white & black right.
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*/
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if (!strcmp(name, "white"))
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name="#ffffffffffff";
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if (!strcmp(name, "black"))
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name="#000000000000";
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XGetWindowAttributes(dpy, w, &wind_info);
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colormap = wind_info.colormap;
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if (!XParseColor(dpy, colormap, name, &c))
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Fatal_Error("Bad color format '%s'.", name);
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if (!XAllocColor(dpy, colormap, &c))
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Fatal_Error("XAllocColor failed!");
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return(c.pixel);
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}
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/*
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* Bitmap_To_Pixmap: Convert a bitmap to a 2 colored pixmap. The colors come
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* from the foreground and background colors of the gc.
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* Width and height are required solely for efficiency.
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* If needed, they can be obtained via. XGetGeometry.
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*/
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Pixmap Bitmap_To_Pixmap(dpy, d, gc, bitmap, width, height)
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Display *dpy;
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Drawable d;
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GC gc;
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Pixmap bitmap;
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int width, height;
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{
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Pixmap pix;
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int x;
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unsigned int i, depth;
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Drawable root;
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if (!XGetGeometry(dpy, d, &root, &x, &x, &i, &i, &i, &depth))
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return(0);
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pix = XCreatePixmap(dpy, d, width, height, (int)depth);
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XCopyPlane(dpy, bitmap, pix, gc, 0, 0, width, height, 0, 0, 1);
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return(pix);
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}
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/*
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* blip: a debugging routine. Prints Blip! on stderr with flushing.
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*/
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void blip()
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{
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fflush(stdout);
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fprintf(stderr, "blip!\n");
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fflush(stderr);
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}
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/*
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* Routine to let user select a window using the mouse
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*/
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Window Select_Window(dpy)
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Display *dpy;
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{
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int status;
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Cursor cursor;
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XEvent event;
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Window target_win = None, root = RootWindow(dpy,screen);
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int buttons = 0;
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/* Make the target cursor */
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cursor = XCreateFontCursor(dpy, XC_crosshair);
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/* Grab the pointer using target cursor, letting it room all over */
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status = XGrabPointer(dpy, root, False,
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ButtonPressMask|ButtonReleaseMask, GrabModeSync,
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GrabModeAsync, root, cursor, CurrentTime);
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if (status != GrabSuccess) Fatal_Error("Can't grab the mouse.");
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/* Let the user select a window... */
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while ((target_win == None) || (buttons != 0)) {
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/* allow one more event */
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XAllowEvents(dpy, SyncPointer, CurrentTime);
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XWindowEvent(dpy, root, ButtonPressMask|ButtonReleaseMask, &event);
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switch (event.type) {
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case ButtonPress:
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if (target_win == None) {
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target_win = event.xbutton.subwindow; /* window selected */
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if (target_win == None) target_win = root;
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}
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buttons++;
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break;
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case ButtonRelease:
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if (buttons > 0) /* there may have been some down before we started */
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buttons--;
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break;
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}
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}
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XUngrabPointer(dpy, CurrentTime); /* Done with pointer */
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return(target_win);
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}
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/*
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* Window_With_Name: routine to locate a window with a given name on a display.
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* If no window with the given name is found, 0 is returned.
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* If more than one window has the given name, the first
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* one found will be returned. Only top and its subwindows
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* are looked at. Normally, top should be the RootWindow.
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*/
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Window Window_With_Name(dpy, top, name)
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Display *dpy;
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Window top;
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char *name;
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{
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Window *children, dummy;
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unsigned int nchildren;
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int i;
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Window w=0;
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char *window_name;
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if (XFetchName(dpy, top, &window_name) && !strcmp(window_name, name))
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return(top);
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if (!XQueryTree(dpy, top, &dummy, &dummy, &children, &nchildren))
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return(0);
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for (i=0; i<nchildren; i++) {
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w = Window_With_Name(dpy, children[i], name);
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if (w)
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break;
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}
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if (children) XFree ((char *)children);
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return(w);
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}
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/*
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* outl: a debugging routine. Flushes stdout then prints a message on stderr
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* and flushes stderr. Used to print messages when past certain points
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* in code so we can tell where we are. Outl may be invoked like
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* printf with up to 7 arguments.
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*/
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void
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outl(char *msg, ...)
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{
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va_list args;
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fflush(stdout);
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va_start(args, msg);
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vfprintf(stderr, msg, args);
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va_end(args);
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fprintf(stderr, "\n");
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fflush(stderr);
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}
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/*
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* Standard fatal error routine - call like printf but maximum of 7 arguments.
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* Does not require dpy or screen defined.
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*/
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void Fatal_Error(char *msg, ...)
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{
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va_list args;
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fflush(stdout);
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fflush(stderr);
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fprintf(stderr, "%s: error: ", program_name);
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va_start(args, msg);
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vfprintf(stderr, msg, args);
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va_end(args);
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fprintf(stderr, "\n");
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exit(1);
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}
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