1 /*
2
3 Copyright 1989, 1998 The Open Group
4
5 Permission to use, copy, modify, distribute, and sell this software and its
6 documentation for any purpose is hereby granted without fee, provided that
7 the above copyright notice appear in all copies and that both that
8 copyright notice and this permission notice appear in supporting
9 documentation.
10
11 The above copyright notice and this permission notice shall be included in
12 all copies or substantial portions of the Software.
13
14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
18 AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
19 CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
20
21 Except as contained in this notice, the name of The Open Group shall not be
22 used in advertising or otherwise to promote the sale, use or other dealings
23 in this Software without prior written authorization from The Open Group.
24
25 */
26
27 #ifdef HAVE_CONFIG_H
28 #include <config.h>
29 #endif
30 #include "Xlibint.h"
31 #include "Xutil.h"
32
33 static int _GeometryMaskToGravity(
34 int mask);
35
36 /*
37 * This routine given a user supplied positional argument and a default
38 * argument (fully qualified) will return the position the window should take
39 * as well as the gravity to be set in the WM_NORMAL_HINTS size hints.
40 * Always sets all return values and returns a mask describing which fields
41 * were set by the user or'ed with whether or not the x and y values should
42 * be considered "negative".
43 */
44
45 int
XWMGeometry(Display * dpy,int screen,_Xconst char * user_geom,_Xconst char * def_geom,unsigned int bwidth,XSizeHints * hints,int * x_return,int * y_return,int * width_return,int * height_return,int * gravity_return)46 XWMGeometry (
47 Display *dpy, /* user's display connection */
48 int screen, /* screen on which to do computation */
49 _Xconst char *user_geom, /* user provided geometry spec */
50 _Xconst char *def_geom, /* default geometry spec for window */
51 unsigned int bwidth, /* border width */
52 XSizeHints *hints, /* usually WM_NORMAL_HINTS */
53 int *x_return, /* location of window */
54 int *y_return, /* location of window */
55 int *width_return, /* size of window */
56 int *height_return, /* size of window */
57 int *gravity_return) /* gravity of window */
58 {
59 int ux, uy; /* returned values from parse */
60 unsigned int uwidth, uheight; /* returned values from parse */
61 int umask; /* parse mask of returned values */
62 int dx, dy; /* default values from parse */
63 unsigned int dwidth, dheight; /* default values from parse */
64 int dmask; /* parse mask of returned values */
65 int base_width, base_height; /* valid amounts */
66 int min_width, min_height; /* valid amounts */
67 int width_inc, height_inc; /* valid amounts */
68 int rx, ry, rwidth, rheight; /* return values */
69 int rmask; /* return mask */
70
71 /*
72 * Get the base sizes and increments. Section 4.1.2.3 of the ICCCM
73 * states that the base and minimum sizes are defaults for each other.
74 * If neither is given, then the base sizes should be 0. These parameters
75 * control the sets of sizes that window managers should allow for the
76 * window according to the following formulae:
77 *
78 * width = base_width + (i * width_inc)
79 * height = base_height + (j * height_inc)
80 */
81 base_width = ((hints->flags & PBaseSize) ? hints->base_width :
82 ((hints->flags & PMinSize) ? hints->min_width : 0));
83 base_height = ((hints->flags & PBaseSize) ? hints->base_height :
84 ((hints->flags & PMinSize) ? hints->min_height : 0));
85 min_width = ((hints->flags & PMinSize) ? hints->min_width : base_width);
86 min_height = ((hints->flags & PMinSize) ? hints->min_height : base_height);
87 width_inc = (hints->flags & PResizeInc) ? hints->width_inc : 1;
88 height_inc = (hints->flags & PResizeInc) ? hints->height_inc : 1;
89
90
91 /*
92 * parse the two geometry masks
93 */
94 rmask = umask = XParseGeometry (user_geom, &ux, &uy, &uwidth, &uheight);
95 dmask = XParseGeometry (def_geom, &dx, &dy, &dwidth, &dheight);
96
97
98 /*
99 * get the width and height:
100 * 1. if user-specified, then take that value
101 * 2. else, if program-specified, then take that value
102 * 3. else, take 1
103 * 4. multiply by the size increment
104 * 5. and add to the base size
105 */
106 rwidth = ((((umask & WidthValue) ? uwidth :
107 ((dmask & WidthValue) ? dwidth : 1)) * width_inc) +
108 base_width);
109 rheight = ((((umask & HeightValue) ? uheight :
110 ((dmask & HeightValue) ? dheight : 1)) * height_inc) +
111 base_height);
112
113 /*
114 * Make sure computed size is within limits. Note that we always do the
115 * lower bounds check since the base size (which defaults to 0) should
116 * be used if a minimum size isn't specified.
117 */
118 if (rwidth < min_width) rwidth = min_width;
119 if (rheight < min_height) rheight = min_height;
120
121 if (hints->flags & PMaxSize) {
122 if (rwidth > hints->max_width) rwidth = hints->max_width;
123 if (rheight > hints->max_height) rheight = hints->max_height;
124 }
125
126
127 /*
128 * Compute the location. Set the negative flags in the return mask
129 * (and watch out for borders), if necessary.
130 */
131 if (umask & XValue) {
132 rx = ((umask & XNegative) ?
133 (DisplayWidth (dpy, screen) + ux - rwidth - 2 * bwidth) : ux);
134 } else if (dmask & XValue) {
135 if (dmask & XNegative) {
136 rx = (DisplayWidth (dpy, screen) + dx - rwidth - 2 * bwidth);
137 rmask |= XNegative;
138 } else
139 rx = dx;
140 } else {
141 rx = 0; /* gotta choose something... */
142 }
143
144 if (umask & YValue) {
145 ry = ((umask & YNegative) ?
146 (DisplayHeight(dpy, screen) + uy - rheight - 2 * bwidth) : uy);
147 } else if (dmask & YValue) {
148 if (dmask & YNegative) {
149 ry = (DisplayHeight(dpy, screen) + dy - rheight - 2 * bwidth);
150 rmask |= YNegative;
151 } else
152 ry = dy;
153 } else {
154 ry = 0; /* gotta choose something... */
155 }
156
157
158 /*
159 * All finished, so set the return variables.
160 */
161 *x_return = rx;
162 *y_return = ry;
163 *width_return = rwidth;
164 *height_return = rheight;
165 *gravity_return = _GeometryMaskToGravity (rmask);
166 return rmask;
167 }
168
169
_GeometryMaskToGravity(int mask)170 static int _GeometryMaskToGravity(
171 int mask)
172 {
173 switch (mask & (XNegative|YNegative)) {
174 case 0:
175 return NorthWestGravity;
176 case XNegative:
177 return NorthEastGravity;
178 case YNegative:
179 return SouthWestGravity;
180 default:
181 return SouthEastGravity;
182 }
183 }
184