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