ioncore/sizehint.c

   1 /*
   2  * ion/ioncore/sizehint.c
   3  *
   4  * Copyright (c) Tuomo Valkonen 1999-2009.
   5  *
   6  * See the included file LICENSE for details.
   7  */
   8
   9 #include <string.h>
  10 #include <libtu/minmax.h>
  11
  12 #include "common.h"
  13 #include "global.h"
  14 #include "region.h"
  15 #include "resize.h"
  16 #include "sizehint.h"
  17 #include "rootwin.h"
  18
  19
  20 /*{{{ xsizehints_correct */
  21
  22
  23 static void do_correct_aspect(int max_w, int max_h, int ax, int ay,
  24                               int *wret, int *hret)
  25 {
  26     int w=*wret, h=*hret;
  27
  28     if(ax>ay){
  29         h=(w*ay)/ax;
  30         if(max_h>0 && h>max_h){
  31             h=max_h;
  32             w=(h*ax)/ay;
  33         }
  34     }else{
  35         w=(h*ax)/ay;
  36         if(max_w>0 && w>max_w){
  37             w=max_w;
  38             h=(w*ay)/ax;
  39         }
  40     }
  41
  42     *wret=w;
  43     *hret=h;
  44 }
  45
  46
  47 static void correct_aspect(int max_w, int max_h, const WSizeHints *hints,
  48                            int *wret, int *hret)
  49 {
  50     if(!hints->aspect_set)
  51         return;
  52
  53     if(*wret*hints->max_aspect.y>*hret*hints->max_aspect.x){
  54         do_correct_aspect(max_w, max_h,
  55                           hints->min_aspect.x, hints->min_aspect.y,
  56                           wret, hret);
  57     }
  58
  59     if(*wret*hints->min_aspect.y<*hret*hints->min_aspect.x){
  60         do_correct_aspect(max_w, max_h,
  61                           hints->max_aspect.x, hints->max_aspect.y,
  62                           wret, hret);
  63     }
  64 }
  65
  66
  67 void sizehints_correct(const WSizeHints *hints, int *wp, int *hp,
  68                        bool min, bool override_no_constrain)
  69 {
  70     int w=*wp, tw, bw=(hints->base_set ? hints->base_width : 0);
  71     int h=*hp, th, bh=(hints->base_set ? hints->base_height : 0);
  72     int bs=0;
  73
  74     if(min && hints->min_set){
  75         w=maxof(w, hints->min_width);
  76         h=maxof(h, hints->min_height);
  77     }
  78
  79     if(hints->no_constrain && !override_no_constrain){
  80         *wp=w;
  81         *hp=h;
  82         return;
  83     }
  84
  85     tw=w-bw;
  86     th=h-bh;
  87
  88     if(tw>=0 && th>=0)
  89         correct_aspect(tw, th, hints, &tw, &th);
  90
  91     if(hints->inc_set){
  92         if(tw>0)
  93             tw=(tw/hints->width_inc)*hints->width_inc;
  94         if(th>0)
  95             th=(th/hints->height_inc)*hints->height_inc;
  96     }
  97
  98     w=tw+bw;
  99     h=th+bh;
 100
 101     if(hints->max_set){
 102         w=minof(w, hints->max_width);
 103         h=minof(h, hints->max_height);
 104     }
 105
 106     *wp=w;
 107     *hp=h;
 108 }
 109
 110
 111 /*}}}*/
 112
 113
 114 /*{{{ X size hints sanity adjustment */
 115
 116
 117 void xsizehints_sanity_adjust(XSizeHints *hints)
 118 {
 119     if(!(hints->flags&PMinSize)){
 120         if(hints->flags&PBaseSize){
 121             hints->min_width=hints->base_width;
 122             hints->min_height=hints->base_height;
 123         }else{
 124             hints->min_width=0;
 125             hints->min_height=0;
 126         }
 127     }
 128
 129     hints->min_width=maxof(hints->min_width, 0);
 130     hints->min_height=maxof(hints->min_height, 0);
 131
 132     if(!(hints->flags&PBaseSize) || hints->base_width<0)
 133         hints->base_width=hints->min_width;
 134     if(!(hints->flags&PBaseSize) || hints->base_height<0)
 135         hints->base_height=hints->min_height;
 136
 137     if(hints->flags&PMaxSize){
 138         hints->max_width=maxof(hints->max_width, hints->min_width);
 139         hints->max_height=maxof(hints->max_height, hints->min_height);
 140     }
 141
 142     hints->flags|=(PBaseSize|PMinSize);
 143
 144     if(hints->flags&PResizeInc){
 145         if(hints->width_inc<=0 || hints->height_inc<=0){
 146             warn(TR("Invalid client-supplied width/height increment."));
 147             hints->flags&=~PResizeInc;
 148         }
 149     }
 150
 151     if(hints->flags&PAspect){
 152         if(hints->min_aspect.x<=0 || hints->min_aspect.y<=0 ||
 153            hints->min_aspect.x<=0 || hints->min_aspect.y<=0){
 154             warn(TR("Invalid client-supplied aspect-ratio."));
 155             hints->flags&=~PAspect;
 156         }
 157     }
 158
 159     if(!(hints->flags&PWinGravity))
 160         hints->win_gravity=ForgetGravity;
 161 }
 162
 163
 164 /*}}}*/
 165
 166
 167 /*{{{ xsizehints_adjust_for */
 168
 169
 170 void sizehints_adjust_for(WSizeHints *hints, WRegion *reg)
 171 {
 172     WSizeHints tmp_hints;
 173
 174     region_size_hints(reg, &tmp_hints);
 175
 176     if(tmp_hints.min_set){
 177         if(!hints->min_set){
 178             hints->min_set=TRUE;
 179             hints->min_width=tmp_hints.min_width;
 180             hints->min_height=tmp_hints.min_height;
 181         }else{
 182             hints->min_width=maxof(hints->min_width,
 183                                    tmp_hints.min_width);
 184             hints->min_height=maxof(hints->min_height,
 185                                     tmp_hints.min_height);
 186         }
 187     }
 188
 189     if(tmp_hints.max_set && hints->max_set){
 190         hints->max_width=maxof(hints->max_width,
 191                                tmp_hints.max_width);
 192         hints->max_height=maxof(hints->max_height,
 193                                 tmp_hints.max_height);
 194     }else{
 195         hints->max_set=FALSE;
 196     }
 197 }
 198
 199
 200 /*}}}*/
 201
 202
 203 /*{{{ account_gravity */
 204
 205
 206 int xgravity_deltax(int gravity, int left, int right)
 207 {
 208     int woff=left+right;
 209
 210     if(gravity==StaticGravity || gravity==ForgetGravity){
 211         return -left;
 212     }else if(gravity==NorthWestGravity || gravity==WestGravity ||
 213              gravity==SouthWestGravity){
 214         /* */
 215     }else if(gravity==NorthEastGravity || gravity==EastGravity ||
 216              gravity==SouthEastGravity){
 217         /* geom->x=geom->w+geom->x-(geom->w+woff) */
 218         return -woff;
 219     }else if(gravity==CenterGravity || gravity==NorthGravity ||
 220              gravity==SouthGravity){
 221         /* geom->x=geom->x+geom->w/2-(geom->w+woff)/2 */
 222         return -woff/2;
 223     }
 224     return 0;
 225 }
 226
 227
 228 int xgravity_deltay(int gravity, int top, int bottom)
 229 {
 230     int hoff=top+bottom;
 231
 232     if(gravity==StaticGravity || gravity==ForgetGravity){
 233         return -top;
 234     }else if(gravity==NorthWestGravity || gravity==NorthGravity ||
 235              gravity==NorthEastGravity){
 236         /* */
 237     }else if(gravity==SouthWestGravity || gravity==SouthGravity ||
 238              gravity==SouthEastGravity){
 239         /* geom->y=geom->y+geom->h-(geom->h+hoff) */
 240         return -hoff;
 241     }else if(gravity==CenterGravity || gravity==WestGravity ||
 242              gravity==EastGravity){
 243         /* geom->y=geom->y+geom->h/2-(geom->h+hoff)/2 */
 244         return -hoff/2;
 245     }
 246     return 0;
 247 }
 248
 249
 250 void xgravity_translate(int gravity, WRegion *reg, WRectangle *geom)
 251 {
 252     int top=0, left=0, bottom=0, right=0;
 253     WRootWin *root;
 254
 255     root=region_rootwin_of(reg);
 256     region_rootpos(reg, &left, &top);
 257     right=REGION_GEOM(root).w-left-REGION_GEOM(reg).w;
 258     bottom=REGION_GEOM(root).h-top-REGION_GEOM(reg).h;
 259
 260     geom->x+=xgravity_deltax(gravity, left, right);
 261     geom->y+=xgravity_deltay(gravity, top, bottom);
 262 }
 263
 264
 265 /*}}}*/
 266
 267
 268 /*{{{ Init */
 269
 270
 271 void xsizehints_to_sizehints(const XSizeHints *xh, WSizeHints *hints)
 272 {
 273     hints->max_width=xh->max_width;
 274     hints->max_height=xh->max_height;
 275     hints->min_width=xh->min_width;
 276     hints->min_height=xh->min_height;
 277     hints->base_width=xh->base_width;
 278     hints->base_height=xh->base_height;
 279     hints->width_inc=xh->width_inc;
 280     hints->height_inc=xh->height_inc;
 281     hints->min_aspect.x=xh->min_aspect.x;
 282     hints->min_aspect.y=xh->min_aspect.y;
 283     hints->max_aspect.x=xh->max_aspect.x;
 284     hints->max_aspect.y=xh->max_aspect.y;
 285
 286     hints->max_set=((xh->flags&PMaxSize)!=0);
 287     hints->min_set=((xh->flags&PMinSize)!=0);
 288     hints->base_set=((xh->flags&PBaseSize)!=0);
 289     hints->inc_set=((xh->flags&PResizeInc)!=0);
 290     hints->aspect_set=((xh->flags&PAspect)!=0);
 291     hints->no_constrain=0;
 292 }
 293
 294
 295 void sizehints_clear(WSizeHints *hints)
 296 {
 297     hints->max_set=0;
 298     hints->min_set=0;
 299     hints->inc_set=0;
 300     hints->base_set=0;
 301     hints->aspect_set=0;
 302     hints->no_constrain=0;
 303 }
 304
 305
 306 /*}}}*/