wmii/cmd/wm/page.c

/*
 * (C)opyright MMIV-MMVI Anselm R. Garbe <garbeam at gmail dot com>
 * See LICENSE file for license details.
 */

#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include <X11/Xatom.h>

#include "wm.h"

static void handle_after_write_page(IXPServer * s, File * file);

static void toggle_layout(void *obj, char *arg);
static void xexec(void *obj, char *arg);

/* action table for /?/ namespace */
Action page_acttbl[] = {
    {"toggle", toggle_layout},
    {"exec", xexec},
    {0, 0}
};

Page *
alloc_page()
{
    Page *p, *new = cext_emallocz(sizeof(Page));
    char buf[MAX_BUF], buf2[16];

    snprintf(buf2, sizeof(buf2), "%d", pageid);
    snprintf(buf, sizeof(buf), "/%d", pageid);
    new->file[P_PREFIX] = ixp_create(ixps, buf);
    snprintf(buf, sizeof(buf), "/%d/name", pageid);
    new->file[P_NAME] = wmii_create_ixpfile(ixps, buf, buf2);
    snprintf(buf, sizeof(buf), "/%d/layout/", pageid);
    new->file[P_LAYOUT_PREFIX] = ixp_create(ixps, buf);
    snprintf(buf, sizeof(buf), "/%d/layout/sel", pageid);
    new->file[P_SEL_LAYOUT] = ixp_create(ixps, buf);
    new->file[P_SEL_LAYOUT]->bind = 1;    /* mount point */
    snprintf(buf, MAX_BUF, "/%d/layoutname", pageid);
    new->file[P_LAYOUT_NAME] = wmii_create_ixpfile(ixps, buf, def[WM_LAYOUT]->content);
    new->file[P_LAYOUT_NAME]->after_write = handle_after_write_page;
    snprintf(buf, sizeof(buf), "/%d/ctl", pageid);
    new->file[P_CTL] = ixp_create(ixps, buf);
    new->file[P_CTL]->after_write = handle_after_write_page;
    new->floating = alloc_layout(new, LAYOUT_FLOAT);
    new->sel = new->managed = alloc_layout(new, def[WM_LAYOUT]->content);
    for(p = pages; p && p->next; p = p->next);
    if(!p) {
        pages = new;
        new->index = 0;
    }
    else {
        new->prev = p;
        p->next = new;
        new->index = p->index + 1;
    }
    def[WM_SEL_PAGE]->content = new->file[P_PREFIX]->content;
    invoke_wm_event(def[WM_EVENT_PAGE_UPDATE]);
	pageid++;
    npages++;
    XChangeProperty(dpy, root, net_atoms[NET_NUMBER_OF_DESKTOPS], XA_CARDINAL,
			        32, PropModeReplace, (unsigned char *) &npages, 1);
    return new;
}

void
destroy_page(Page * p)
{
	if(!p)
		return;

	Page *newselpage;
	MapQueue *o, *n;

	while(attachqueue && (attachqueue->page == p)) {
		n = attachqueue->next;
		free(attachqueue);
		attachqueue = n;
	}
	o = attachqueue;
	n = nil;
	if(attachqueue)
		n = attachqueue->next;
	while(n) {
		if(n->page == p) {
			o->next = n->next;
			free(n);
			n = o->next;
		} else
			n = n->next;
	}

    destroy_layout(p->floating);
    destroy_layout(p->managed);
    def[WM_SEL_PAGE]->content = 0;
    ixp_remove_file(ixps, p->file[P_PREFIX]);
    if(p == selpage) {
        selpage = nil;
        if(p->prev)
            newselpage = p->prev;
        else
            newselpage = nil;
    }

    if(p == pages) {
        if(p->next) {
            p->next->prev = nil;
            pages = p->next;
            pages->index = 0;
        } else
            pages = nil;
    } else {
        p->prev->next = p->next;
        if(p->next)
            p->next->prev = p->prev;
    }

    free(p); 

    /* update page indexes */
    for (p = pages; p && p->next; p = p->next) {
      if (p->prev && p->prev->index + 1 != p->index) /* if page index difference is not one */
        --(p->index);
    }
 
    npages--;
    XChangeProperty(dpy, root, net_atoms[NET_NUMBER_OF_DESKTOPS], XA_CARDINAL,
			        32, PropModeReplace, (unsigned char *) &npages, 1);

    /* determine what to focus and do that */
    if(newselpage)
        focus_page(newselpage);
    else if(pages)
        focus_page(pages);
    else {
        invoke_wm_event(def[WM_EVENT_CLIENT_UPDATE]);
        invoke_wm_event(def[WM_EVENT_PAGE_UPDATE]);
        XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
    }
}

void
focus_page(Page * p)
{
    if(!p)
        return;

    if(p != selpage) {
        if(selpage) {
            unmap_layout(selpage->managed);
            unmap_layout(selpage->floating);
        }
        map_layout(p->managed, False);
        map_layout(p->floating, False);
    }

    selpage = p;
    def[WM_SEL_PAGE]->content = p->file[P_PREFIX]->content;
    invoke_wm_event(def[WM_EVENT_PAGE_UPDATE]);
    focus_layout(p->sel);
    XChangeProperty(dpy, root, net_atoms[NET_CURRENT_DESKTOP], XA_CARDINAL,
			        32, PropModeReplace, (unsigned char *) &(selpage->index), 1);
}

XRectangle *
rectangles(unsigned int *num)
{
    XRectangle *result = 0;
    int i, j = 0;
    Window d1, d2;
    Window *wins;
    XWindowAttributes wa;
    XRectangle r;

    if(XQueryTree(dpy, root, &d1, &d2, &wins, num)) {
        result = cext_emallocz(*num * sizeof(XRectangle));
        for(i = 0; i < *num; i++) {
            if(!XGetWindowAttributes(dpy, wins[i], &wa))
                continue;
            if(wa.override_redirect && (wa.map_state == IsViewable)) {
                r.x = wa.x;
                r.y = wa.y;
                r.width = wa.width;
                r.height = wa.height;
                result[j++] = r;
            }
        }
    }
    if(wins) {
        XFree(wins);
    }
    *num = j;
    return result;
}

static void
handle_after_write_page(IXPServer * s, File * file)
{
    Page *p;
    for(p = pages; p; p = p->next) {
        if(file == p->file[P_CTL]) {
            run_action(file, p, page_acttbl);
            return;
        }
		else if(file == p->file[P_LAYOUT_NAME]) {
            LayoutDef *l = match_layout_def(file->content);
            Client *clients = nil;

			if(!strncmp(file->content, LAYOUT_FLOAT, strlen(LAYOUT_FLOAT)))
				l = nil;
			
			if(p->managed->def)
				clients = p->managed->def->deinit(p->managed);
            p->managed->def = l;
            if(l) {
                p->managed->def->init(p->managed, clients);
				focus_layout(p->managed);
			}
			else {
				Client *n;
				focus_layout(p->floating);
				while(clients) {
					n = clients->next;
					p->floating->def->attach(p->floating, clients);
					clients = n;
				}
            }   
            invoke_wm_event(def[WM_EVENT_PAGE_UPDATE]);
        }
    }
}

static void
xexec(void *obj, char *arg)
{
	MapQueue *r;

	if(!attachqueue)
		r = attachqueue = cext_emallocz(sizeof(MapQueue));
	else {
		for(r = attachqueue; r && r->next; r = r->next);
		r->next = cext_emallocz(sizeof(MapQueue));
		r = r->next;
	}
	r->page = obj;
    wmii_spawn(dpy, arg);
}

static void
toggle_layout(void *obj, char *arg)
{
    Page *p = obj;

    if(!p->managed->def || (p->sel == p->managed))
    	focus_layout(p->floating);
    else
    	focus_layout(p->managed);
}