client.c


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
<!DOCTYPE html PUBLIC "-//IETF//DTD HTML 3.0//EN">
<HTML> 
<HEAD> 
<TITLE>Test of invalid NCRs 128-159</TITLE> 
</HEAD> 
<BODY><H2>Test of invalid NCRs 128-159</H2> 
<P> 
Authoring tools on MS Windows, in particular MS FrontPage ("WYSIWYG" HTML editor), 
generate invalid <DFN>Numerical Character References</DFN> for characters 
commonly found in positions 128...159 (0x80...0x9f) in Windows fonts.  Although 
these are valid codepoints for <em>windows-1252</em> (and other 
windows-xxxx) charsets, valid NCRs always refer to the document character set 
in the SGML sense, not to the character encoding scheme (or charset).  For HTML, 
the SGML document character set is fixed, it is always a subset of Unicode 
(or ISO 10646).  In Unicode and its iso-8859-1 subset, values 128...159 are 
C1 control characters, they must not appear in HTML.  Valid NCRs for the 
intended characters use Unicode values greater than 256. 
<p> 
Lynx tries to interpret some of the invalid codes, by assuming that they are 
windows-1252 codepoints. 
<PRE> 
 
You may want to press '\' to view the source of this test. 
 
<em>Code      invalid NCR    <!--    --> <tab id=c>valid NCR, description</em> 
<em>        normal   in ALT  <a id=table></a>				</em> 
                             
0x80    &#x80;	<IMG SRC=X ALT="&#x80;"> <tab to=c>&#x20AC;	#EURO SIGN 
0x81    &#x81;	<IMG SRC=X ALT="&#x81;"> <!--&#x0081;-->	#NOT USED 
0x82    &#x82;	<IMG SRC=X ALT="&#x82;"> <tab to=c>&#x201a;	#SINGLE LOW-9 QUOTATION MARK 
0x83    &#x83;	<IMG SRC=X ALT="&#x83;"> <tab to=c>&#x0192;	#LATIN SMALL LETTER F WITH HOOK 
0x84    &#x84;	<IMG SRC=X ALT="&#x84;"> <tab to=c>&#x201e;	#DOUBLE LOW-9 QUOTATION MARK 
0x85    &#x85;	<IMG SRC=X ALT="&#x85;"> <tab to=c>&#x2026;	#HORIZONTAL ELLIPSIS 
0x86    &#x86;	<IMG SRC=X ALT="&#x86;"> <tab to=c>&#x2020;	#DAGGER 
0x87    &#x87;	<IMG SRC=X ALT="&#x87;"> <tab to=c>&#x2021;	#DOUBLE DAGGER 
0x88    &#x88;	<IMG SRC=X ALT="&#x88;"> <tab to=c>&#x02c6;	#MODIFIER LETTER CIRCUMFLEX ACCENT 
0x89    &#x89;	<IMG SRC=X ALT="&#x89;"> <tab to=c>&#x2030;	#PER MILLE SIGN 
0x8a    &#x8a;	<IMG SRC=X ALT="&#x8a;"> <tab to=c>&#x0160;	#LATIN CAPITAL LETTER S WITH CARON 
0x8b    &#x8b;	<I/*
 * (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
 * See LICENSE file for license details.
 */
#include "dwm.h"
#include <stdlib.h>
#include <string.h>
#include <X11/Xatom.h>
#include <X11/Xutil.h>

/* static functions */

static void
resizetitle(Client *c)
{
	int i;

	c->tw = 0;
	for(i = 0; i < ntags; i++)
		if(c->tags[i])
			c->tw += textw(tags[i]);
	c->tw += textw(c->name);
	if(c->tw > c->w)
		c->tw = c->w + 2;
	c->tx = c->x + c->w - c->tw + 2;
	c->ty = c->y;
	if(c->tags[tsel])
		XMoveResizeWindow(dpy, c->title, c->tx, c->ty, c->tw, c->th);
	else
		XMoveResizeWindow(dpy, c->title, c->tx + 2 * sw, c->ty, c->tw, c->th);

}

static int
xerrordummy(Display *dsply, XErrorEvent *ee)
{
	return 0;
}

/* extern functions */

void
ban(Client *c)
{
	XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
	XMoveWindow(dpy, c->title, c->tx + 2 * sw, c->ty);
}

void
focus(Client *c)
{
	if (!issel)
		return;
	Client *old = sel;
	XEvent ev;

	sel = c;
	if(old && old != c)
		drawtitle(old);
	drawtitle(c);
	XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
	XSync(dpy, False);
	while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
}

void
focusnext(Arg *arg)
{
	Client *c;
   
	if(!sel)
		return;

	if(sel->ismax)
		togglemax(NULL);

	if(!(c = getnext(sel->next)))
		c = getnext(clients);
	if(c) {
		higher(c);
		focus(c);
	}
}

void
focusprev(Arg *arg)
{
	Client *c;

	if(!sel)
		return;

	if(sel->ismax)
		togglemax(NULL);

	if(!(c = getprev(sel->prev))) {
		for(c = clients; c && c->next; c = c->next);
		c = getprev(c);
	}
	if(c) {
		higher(c);
		focus(c);
	}
}

Client *
getclient(Window w)
{
	Client *c;

	for(c = clients; c; c = c->next)
		if(c->win == w)
			return c;
	return NULL;
}

Client *
getctitle(Window w)
{
	Client *c;

	for(c = clients; c; c = c->next)
		if(c->title == w)
			return c;
	return NULL;
}

void
gravitate(Client *c, Bool invert)
{
	int dx = 0, dy = 0;

	switch(c->grav) {
	default:
		break;
	case StaticGravity:
	case NorthWestGravity:
	case NorthGravity:
	case NorthEastGravity:
		dy = c->border;
		break;
	case EastGravity:
	case CenterGravity:
	case WestGravity:
		dy = -(c->h / 2) + c->border;
		break;
	case SouthEastGravity:
	case SouthGravity:
	case SouthWestGravity:
		dy = -(c->h);
		break;
	}

	switch (c->grav) {
	default:
		break;
	case StaticGravity:
	case NorthWestGravity:
	case WestGravity:
	case SouthWestGravity:
		dx = c->border;
		break;
	case NorthGravity:
	case CenterGravity:
	case SouthGravity:
		dx = -(c->w / 2) + c->border;
		break;
	case NorthEastGravity:
	case EastGravity:
	case SouthEastGravity:
		dx = -(c->w + c->border);
		break;
	}

	if(invert) {
		dx = -dx;
		dy = -dy;
	}
	c->x += dx;
	c->y += dy;
}

void
higher(Client *c)
{
	XRaiseWindow(dpy, c->win);
	XRaiseWindow(dpy, c->title);
}

void
killclient(Arg *arg)
{
	if(!sel)
		return;
	if(sel->proto & PROTODELWIN)
		sendevent(sel->win, wmatom[WMProtocols], wmatom[WMDelete]);
	else
		XKillClient(dpy, sel->win);
}

void
manage(Window w, XWindowAttributes *wa)
{
	Client *c;
	Window trans;
	XSetWindowAttributes twa;

	c = emallocz(sizeof(Client));
	c->tags = emallocz(ntags * sizeof(Bool));
	c->win = w;
	c->x = c->tx = wa->x;
	c->y = c->ty = wa->y;
	c->w = c->tw = wa->width;
	c->h = wa->height;
	c->th = bh;

	c->border = 0;
	setsize(c);

	if(c->h != sh && c->y < bh)
		c->y = c->ty = bh;

	c->proto = getproto(c->win);
	XSelectInput(dpy, c->win,
		StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
	XGetTransientForHint(dpy, c->win, &trans);
	twa.override_redirect = 1;
	twa.background_pixmap = ParentRelative;
	twa.event_mask = ExposureMask | EnterWindowMask;

	c->title = XCreateWindow(dpy, root, c->tx, c->ty, c->tw, c->th,
			0, DefaultDepth(dpy, screen), CopyFromParent,
			DefaultVisual(dpy, screen),
			CWOverrideRedirect | CWBackPixmap | CWEventMask, &twa);

	if(clients)
		clients->prev = c;
	c->next = clients;
	clients = c;

	XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
			GrabModeAsync, GrabModeSync, None, None);
	XGrabButton(dpy, Button1, MODKEY | LockMask, c->win, False, BUTTONMASK,
			GrabModeAsync, GrabModeSync, None, None);
	XGrabButton(dpy, Button1, MODKEY | NUMLOCKMASK, c->win, False, BUTTONMASK,
			GrabModeAsync, GrabModeSync, None, None);
	XGrabButton(dpy, Button1, MODKEY | NUMLOCKMASK | LockMask, c->win, False, BUTTONMASK,
			GrabModeAsync, GrabModeSync, None, None);

	XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
			GrabModeAsync, GrabModeSync, None, None);
	XGrabButton(dpy, Button2, MODKEY | LockMask, c->win, False, BUTTONMASK,
			GrabModeAsync, GrabModeSync, None, None);
	XGrabButton(dpy, Button2, MODKEY | NUMLOCKMASK, c->win, False, BUTTONMASK,
			GrabModeAsync, GrabModeSync, None, None);
	XGrabButton(dpy, Button2, MODKEY | NUMLOCKMASK | LockMask, c->win, False, BUTTONMASK,
			GrabModeAsync, GrabModeSync, None, None);

	XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
			GrabModeAsync, GrabModeSync, None, None);
	XGrabButton(dpy, Button3, MODKEY | LockMask, c->win, False, BUTTONMASK,
			GrabModeAsync, GrabModeSync, None, None);
	XGrabButton(dpy, Button3, MODKEY | NUMLOCKMASK, c->win, False, BUTTONMASK,
			GrabModeAsync, GrabModeSync, None, None);
	XGrabButton(dpy, Button3, MODKEY | NUMLOCKMASK | LockMask, c->win, False, BUTTONMASK,
			GrabModeAsync, GrabModeSync, None, None);

	settags(c);
	if(!c->isfloat)
		c->isfloat = trans
			|| (c->maxw && c->minw &&
				c->maxw == c->minw && c->maxh == c->minh);
	settitle(c);
	arrange(NULL);

	/* mapping the window now prevents flicker */
	XMapRaised(dpy, c->win);
	XMapRaised(dpy, c->title);
	if(c->tags[tsel])
		focus(c);
}

void
resize(Client *c, Bool sizehints, Corner sticky)
{
	int bottom = c->y + c->h;
	int right = c->x + c->w;
	/*XConfigureEvent e;*/
	XWindowChanges wc;

	if(sizehints) {
		if(c->incw)
			c->w -= (c->w - c->basew) % c->incw;
		if(c->inch)
			c->h -= (c->h - c->baseh) % c->inch;
		if(c->minw && c->w < c->minw)
			c->w = c->minw;
		if(c->minh && c->h < c->minh)
			c->h = c->minh;
		if(c->maxw && c->w > c->maxw)
			c->w = c->maxw;
		if(c->maxh && c->h > c->maxh)
			c->h = c->maxh;
	}
	if(c->x > right) /* might happen on restart */
		c->x = right - c->w;
	if(c->y > bottom)
		c->y = bottom - c->h;
	if(sticky == TopRight || sticky == BotRight)
		c->x = right - c->w;
	if(sticky == BotLeft || sticky == BotRight)
		c->y = bottom - c->h;

	resizetitle(c);
	wc.x = c->x;
	wc.y = c->y;
	wc.width = c->w;
	wc.height = c->h;
	if(c->w == sw && c->h == sh)
		wc.border_width = 0;
	else
		wc.border_width = 1;
	XConfigureWindow(dpy, c->win, CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
	XSync(dpy, False);
}

void
setsize(Client *c)
{
	long msize;
	XSizeHints size;

	if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
		size.flags = PSize;
	c->flags = size.flags;
	if(c->flags & PBaseSize) {
		c->basew = size.base_width;
		c->baseh = size.base_height;
	}
	else
		c->basew = c->baseh = 0;
	if(c->flags & PResizeInc) {
		c->incw = size.width_inc;
		c->inch = size.height_inc;
	}
	else
		c->incw = c->inch = 0;
	if(c->flags & PMaxSize) {
		c->maxw = size.max_width;
		c->maxh = size.max_height;
	}
	else
		c->maxw = c->maxh = 0;
	if(c->flags & PMinSize) {
		c->minw = size.min_width;
		c->minh = size.min_height;
	}
	else
		c->minw = c->minh = 0;
	if(c->flags & PWinGravity)
		c->grav = size.win_gravity;
	else
		c->grav = NorthWestGravity;
}

void
settitle(Client *c)
{
	char **list = NULL;
	int n;
	XTextProperty name;

	name.nitems = 0;
	c->name[0] = 0;
	XGetTextProperty(dpy, c->win, &name, netatom[NetWMName]);
	if(!name.nitems)
		XGetWMName(dpy, c->win, &name);
	if(!name.nitems)
		return;
	if(name.encoding == XA_STRING)
		strncpy(c->name, (char *)name.value, sizeof(c->name));
	else {
		if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
				&& n > 0 && *list)
		{
			strncpy(c->name, *list, sizeof(c->name));
			XFreeStringList(list);
		}
	}
	XFree(name.value);
	resizetitle(c);
}

void
togglemax(Arg *arg)
{
	int ox, oy, ow, oh;
	XEvent ev;

	if(!sel)
		return;

	if((sel->ismax = !sel->ismax)) {
		ox = sel->x;
		oy = sel->y;
		ow = sel->w;
		oh = sel->h;
		sel->x = sx;
		sel->y = sy + bh;
		sel->w = sw - 2;
		sel->h = sh - 2 - bh;

		higher(sel);
		resize(sel, arrange == dofloat, TopLeft);

		sel->x = ox;
		sel->y = oy;
		sel->w = ow;
		sel->h = oh;
	}
	else
		resize(sel, False, TopLeft);
	while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
}

void
unmanage(Client *c)
{
	XGrabServer(dpy);
	XSetErrorHandler(xerrordummy);

	XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
	XDestroyWindow(dpy, c->title);

	if(c->prev)
		c->prev->next = c->next;
	if(c->next)
		c->next->prev = c->prev;
	if(c == clients)
		clients = c->next;
	if(sel == c)
		sel = getnext(clients);
	free(c->tags);
	free(c);

	XSync(dpy, False);
	XSetErrorHandler(xerror);
	XUngrabServer(dpy);
	arrange(NULL);
	if(sel)
		focus(sel);
}

void
zoom(Arg *arg)
{
	Client *c;

	if(!sel || (arrange != dotile) || sel->isfloat || sel->ismax)
		return;

	if(sel == getnext(clients))  {
		if((c = getnext(sel->next)))
			sel = c;
		else
			return;
	}

	/* pop */
	sel->prev->next = sel->next;
	if(sel->next)
		sel->next->prev = sel->prev;
	sel->prev = NULL;
	clients->prev = sel;
	sel->next = clients;
	clients = sel;
	arrange(NULL);
	focus(sel);
}