1/*
  2 * (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
  3 * See LICENSE file for license details.
  4 */
  5
  6#include <stdlib.h>
  7#include <string.h>
  8#include <X11/Xatom.h>
  9
 10#include "util.h"
 11#include "wm.h"
 12
 13static void
 14resize_title(Client *c)
 15{
 16	c->tw = textw(&brush.font, c->name) + bh;
 17	if(c->tw > c->w)
 18		c->tw = c->w + 2;
 19	c->tx = c->x + c->w - c->tw + 2;
 20	c->ty = c->y;
 21	XMoveResizeWindow(dpy, c->title, c->tx, c->ty, c->tw, c->th);
 22}
 23
 24void
 25update_name(Client *c)
 26{
 27	XTextProperty name;
 28	int n;
 29	char **list = NULL;
 30
 31	name.nitems = 0;
 32	c->name[0] = 0;
 33	XGetTextProperty(dpy, c->win, &name, net_atom[NetWMName]);
 34	if(!name.nitems)
 35		XGetWMName(dpy, c->win, &name);
 36	if(!name.nitems)
 37		return;
 38	if(name.encoding == XA_STRING)
 39		strncpy(c->name, (char *)name.value, sizeof(c->name));
 40	else {
 41		if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
 42				&& n > 0 && *list)
 43		{
 44			strncpy(c->name, *list, sizeof(c->name));
 45			XFreeStringList(list);
 46		}
 47	}
 48	XFree(name.value);
 49	resize_title(c);
 50}
 51
 52void
 53update_size(Client *c)
 54{
 55	XSizeHints size;
 56	long msize;
 57	if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
 58		size.flags = PSize;
 59	c->flags = size.flags;
 60	if(c->flags & PBaseSize) {
 61		c->basew = size.base_width;
 62		c->baseh = size.base_height;
 63	}
 64	else
 65		c->basew = c->baseh = 0;
 66	if(c->flags & PResizeInc) {
 67		c->incw = size.width_inc;
 68		c->inch = size.height_inc;
 69	}
 70	else
 71		c->incw = c->inch = 0;
 72	if(c->flags & PMaxSize) {
 73		c->maxw = size.max_width;
 74		c->maxh = size.max_height;
 75	}
 76	else
 77		c->maxw = c->maxh = 0;
 78	if(c->flags & PMinSize) {
 79		c->minw = size.min_width;
 80		c->minh = size.min_height;
 81	}
 82	else
 83		c->minw = c->minh = 0;
 84}
 85
 86void
 87raise(Client *c)
 88{
 89	XRaiseWindow(dpy, c->win);
 90	XRaiseWindow(dpy, c->title);
 91}
 92
 93void
 94lower(Client *c)
 95{
 96	XLowerWindow(dpy, c->title);
 97	XLowerWindow(dpy, c->win);
 98}
 99
100void
101focus(Client *c)
102{
103	Client **l, *old;
104
105	old = stack;
106	for(l = &stack; *l && *l != c; l = &(*l)->snext);
107	eassert(*l == c);
108	*l = c->snext;
109	c->snext = stack;
110	stack = c;
111	if(old && old != c) {
112		XMapWindow(dpy, old->title);
113		draw_client(old);
114	}
115	XUnmapWindow(dpy, c->title);
116	draw_client(old);
117	XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
118	XFlush(dpy);
119}
120
121void
122manage(Window w, XWindowAttributes *wa)
123{
124	Client *c, **l;
125	XSetWindowAttributes twa;
126
127	c = emallocz(sizeof(Client));
128	c->win = w;
129	c->tx = c->x = wa->x;
130	c->ty = c->y = wa->y;
131	if(c->y < bh)
132		c->ty = c->y += bh;
133	c->tw = c->w = wa->width;
134	c->h = wa->height;
135	c->th = bh;
136	update_size(c);
137	XSetWindowBorderWidth(dpy, c->win, 1);
138	XSetWindowBorder(dpy, c->win, brush.border);
139	XSelectInput(dpy, c->win,
140			StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
141	XGetTransientForHint(dpy, c->win, &c->trans);
142	twa.override_redirect = 1;
143	twa.background_pixmap = ParentRelative;
144	twa.event_mask = ExposureMask;
145
146	c->title = XCreateWindow(dpy, root, c->tx, c->ty, c->tw, c->th,
147			0, DefaultDepth(dpy, screen), CopyFromParent,
148			DefaultVisual(dpy, screen),
149			CWOverrideRedirect | CWBackPixmap | CWEventMask, &twa);
150	update_name(c);
151
152	for(l=&clients; *l; l=&(*l)->next);
153	c->next = *l; /* *l == nil */
154	*l = c;
155	c->snext = stack;
156	stack = c;
157	XMapRaised(dpy, c->win);
158	XMapRaised(dpy, c->title);
159	XGrabButton(dpy, Button1, Mod1Mask, c->win, False, ButtonPressMask,
160			GrabModeAsync, GrabModeSync, None, None);
161	XGrabButton(dpy, Button2, Mod1Mask, c->win, False, ButtonPressMask,
162			GrabModeAsync, GrabModeSync, None, None);
163	XGrabButton(dpy, Button3, Mod1Mask, c->win, False, ButtonPressMask,
164			GrabModeAsync, GrabModeSync, None, None);
165	resize(c);
166	focus(c);
167}
168
169void
170resize(Client *c)
171{
172	XConfigureEvent e;
173
174	resize_title(c);
175	XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
176	e.type = ConfigureNotify;
177	e.event = c->win;
178	e.window = c->win;
179	e.x = c->x;
180	e.y = c->y;
181	e.width = c->w;
182	e.height = c->h;
183	e.border_width = 0;
184	e.above = None;
185	e.override_redirect = False;
186	XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&e);
187	XFlush(dpy);
188}
189
190static int
191dummy_error_handler(Display *dpy, XErrorEvent *error)
192{
193	return 0;
194}
195
196void
197unmanage(Client *c)
198{
199	Client **l;
200
201	XGrabServer(dpy);
202	XSetErrorHandler(dummy_error_handler);
203
204	XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
205	XDestroyWindow(dpy, c->title);
206
207	for(l=&clients; *l && *l != c; l=&(*l)->next);
208	eassert(*l == c);
209	*l = c->next;
210	for(l=&stack; *l && *l != c; l=&(*l)->snext);
211	eassert(*l == c);
212	*l = c->snext;
213	free(c);
214
215	XFlush(dpy);
216	XSetErrorHandler(error_handler);
217	XUngrabServer(dpy);
218	if(stack)
219		focus(stack);
220}
221
222Client *
223gettitle(Window w)
224{
225	Client *c;
226	for(c = clients; c; c = c->next)
227		if(c->title == w)
228			return c;
229	return NULL;
230}
231
232Client *
233getclient(Window w)
234{
235	Client *c;
236	for(c = clients; c; c = c->next)
237		if(c->win == w)
238			return c;
239	return NULL;
240}
241
242void
243draw_client(Client *c)
244{
245	if(c == stack) {
246		draw_bar();
247		return;
248	}
249
250	brush.x = brush.y = 0;
251	brush.w = c->tw;
252	brush.h = c->th;
253
254	draw(dpy, &brush, True, c->name);
255	XCopyArea(dpy, brush.drawable, c->title, brush.gc,
256			0, 0, c->tw, c->th, 0, 0);
257	XFlush(dpy);
258}