/* $Id: colormaps.c,v 1.1 2004/08/28 19:25:45 dannybackx Exp $ *//**************************************************************************** * This module is all new * by Rob Nation * * This code handles colormaps for mwm. * * Copyright 1994 Robert Nation. No restrictions are placed on this code, * as long as the copyright notice is preserved. No guarantees or * warrantees of any sort whatsoever are given or implied or anything. ****************************************************************************//*********************************************************************** * The rest of it is all my fault -- MLM * mwm - "LessTif Window Manager" ***********************************************************************/#include <LTconfig.h>#include <Xm/Xm.h>#include <Xm/MwmUtil.h>#include "mwm.h"/* * install the colormaps for one mwm window */voidCOLOR_InstallWindowColorMap(ScreenInfo *scr, MwmWindow *tmp){    int i;    XWindowAttributes attributes;    Window w;    Bool ThisWinInstalled = False;    /* If no window, then install root colormap */    if (!tmp)	tmp = &scr->mwm_root;    scr->mwm_colormap = tmp;    /*     * Save the colormap to be loaded for when force loading of     * root colormap(s) ends.     */    scr->mwm_pushed = tmp;    /*     * Don't load any new colormap if root colormap(s) has been     * force loaded.     */    if (scr->root_pushes)	return;    if (tmp->number_cmap_windows > 0)    {	for (i = tmp->number_cmap_windows - 1; i >= 0; i--)	{	    w = tmp->cmap_windows[i];	    if (w == tmp->w)		ThisWinInstalled = True;	    XGetWindowAttributes(dpy, w, &attributes);	    if (scr->last_cmap != attributes.colormap)	    {		scr->last_cmap = attributes.colormap;		XInstallColormap(dpy, attributes.colormap);	    }	}    }    if (!ThisWinInstalled)    {	if (scr->last_cmap != tmp->attr.colormap)	{	    scr->last_cmap = tmp->attr.colormap;	    XInstallColormap(dpy, tmp->attr.colormap);	}    }}/* * The next two matching routines provide a mechanism to insure * that the root colormap(s) is installed during operations like * rubber banding or menu display that require colors from * that colormap.  Calls may be nested arbitrarily deeply, * as long as there is one UninstallRootColormap call per * COLOR_InstallRootColormap call. * * The final UninstallRootColormap will cause the colormap list * which would otherwise have be loaded to be loaded, unless * Enter or Leave Notify events are queued, indicating some * other colormap list would potentially be loaded anyway. *//* * force (un)loads root colormap(s) */voidCOLOR_PushRootColorMap(ScreenInfo *scr){    MwmWindow *tmp;    if (scr->root_pushes == 0)    {	tmp = scr->mwm_pushed;	COLOR_InstallWindowColorMap(scr, &scr->mwm_root);	scr->mwm_pushed = tmp;    }    scr->root_pushes++;}/* * Unstacks one layer of root colormap pushing  * If we peel off the last layer, re-install the application colormap */voidCOLOR_PopRootColorMap(ScreenInfo *scr){    if (scr->root_pushes)	scr->root_pushes--;    if (!scr->root_pushes)	COLOR_InstallWindowColorMap(scr, scr->mwm_pushed);}