2 * ion/ioncore/sizepolicy.c
4 * Copyright (c) Tuomo Valkonen 1999-2007.
6 * See the included file LICENSE for details.
9 #include <libtu/minmax.h>
16 #include "sizepolicy.h"
20 static int fit_x(int x, int w, const WRectangle *max_geom)
22 int mw=maxof(max_geom->w, 1);
24 return minof(maxof(x, max_geom->x), max_geom->x+mw-w);
28 static int fit_y(int y, int h, const WRectangle *max_geom)
30 int mh=maxof(max_geom->h, 1);
32 return minof(maxof(y, max_geom->y), max_geom->y+mh-h);
36 static void do_gravity(const WRectangle *max_geom, int szplcy,
39 /* Assumed: width and height already adjusted within limits */
45 switch(szplcy&SIZEPOLICY_HORIZ_MASK){
46 case SIZEPOLICY_HORIZ_LEFT:
50 case SIZEPOLICY_HORIZ_RIGHT:
51 geom->x=max_geom->x+max_geom->w-geom->w;
54 case SIZEPOLICY_HORIZ_CENTER:
55 geom->x=max_geom->x+max_geom->w/2-geom->w/2;
59 geom->x=fit_x(geom->x, geom->w, max_geom);
62 switch(szplcy&SIZEPOLICY_VERT_MASK){
63 case SIZEPOLICY_VERT_TOP:
67 case SIZEPOLICY_VERT_BOTTOM:
68 geom->y=max_geom->y+max_geom->h-geom->h;
71 case SIZEPOLICY_VERT_CENTER:
72 geom->y=max_geom->y+max_geom->h/2-geom->h/2;
76 geom->y=fit_x(geom->y, geom->h, max_geom);
81 static void gravity_stretch_policy(int szplcy, WRegion *reg,
82 const WRectangle *rq_geom, WFitParams *fp,
85 WRectangle max_geom=fp->g;
90 w=(ws ? max_geom.w : minof(rq_geom->w, max_geom.w));
91 h=(hs ? max_geom.h : minof(rq_geom->h, max_geom.h));
94 region_size_hints_correct(reg, &w, &h, FALSE);
99 do_gravity(&max_geom, szplcy, &(fp->g));
103 static void sizepolicy_free_snap(WSizePolicy *szplcy, WRegion *reg,
104 WRectangle *rq_geom, int rq_flags,
107 WRectangle max_geom=fp->g;
108 bool fullw=((rq_flags®ION_RQGEOM_WEAK_W) &&
109 (*szplcy&SIZEPOLICY_HORIZ_MASK)==SIZEPOLICY_HORIZ_CENTER);
110 bool fullh=((rq_flags®ION_RQGEOM_WEAK_H) &&
111 (*szplcy&SIZEPOLICY_VERT_MASK)==SIZEPOLICY_VERT_CENTER);
113 int w=(fullw ? max_geom.w : minof(rq_geom->w, max_geom.w));
114 int h=(fullh ? max_geom.h : minof(rq_geom->h, max_geom.h));
118 if(!(rq_flags®ION_RQGEOM_WEAK_X)
119 && rq_flags®ION_RQGEOM_WEAK_W){
120 x_=fit_x(rq_geom->x, 1, &max_geom);
121 if(((*szplcy)&SIZEPOLICY_HORIZ_MASK)==SIZEPOLICY_HORIZ_RIGHT)
122 w=max_geom.x+max_geom.w-x_;
124 w=minof(w, max_geom.x+max_geom.w-x_);
127 if(!(rq_flags®ION_RQGEOM_WEAK_Y)
128 && rq_flags®ION_RQGEOM_WEAK_H){
129 y_=fit_x(rq_geom->y, 1, &max_geom);
130 if(((*szplcy)&SIZEPOLICY_VERT_MASK)==SIZEPOLICY_VERT_BOTTOM)
131 h=max_geom.y+max_geom.h-y_;
133 h=minof(h, max_geom.y+max_geom.h-y_);
137 region_size_hints_correct(reg, &w, &h, FALSE);
142 if(!(rq_flags®ION_RQGEOM_WEAK_X)
143 && rq_flags®ION_RQGEOM_WEAK_W){
145 }else if(rq_flags®ION_RQGEOM_WEAK_X){
146 switch((*szplcy)&SIZEPOLICY_HORIZ_MASK){
147 case SIZEPOLICY_HORIZ_CENTER:
148 fp->g.x=max_geom.x+(max_geom.w-w)/2;
151 case SIZEPOLICY_HORIZ_LEFT:
155 case SIZEPOLICY_HORIZ_RIGHT:
156 fp->g.x=max_geom.x+max_geom.w-w;
160 fp->g.x=fit_x(rq_geom->x, w, &max_geom);
164 fp->g.x=fit_x(rq_geom->x, w, &max_geom);
167 if(!(rq_flags®ION_RQGEOM_WEAK_Y)
168 && rq_flags®ION_RQGEOM_WEAK_H){
170 }else if(rq_flags®ION_RQGEOM_WEAK_Y){
171 switch((*szplcy)&SIZEPOLICY_VERT_MASK){
172 case SIZEPOLICY_VERT_CENTER:
173 fp->g.y=max_geom.y+(max_geom.h-h)/2;
176 case SIZEPOLICY_VERT_TOP:
180 case SIZEPOLICY_VERT_BOTTOM:
181 fp->g.y=max_geom.y+max_geom.h-h;
185 fp->g.y=fit_y(rq_geom->y, h, &max_geom);
189 fp->g.y=fit_y(rq_geom->y, h, &max_geom);
192 (*szplcy)&=~(SIZEPOLICY_VERT_MASK|SIZEPOLICY_HORIZ_MASK);
194 *szplcy|=( (fullw || fp->g.x<=max_geom.x ? SIZEPOLICY_HORIZ_LEFT : 0)
195 |(fullw || fp->g.x+fp->g.w>=max_geom.x+max_geom.w ? SIZEPOLICY_HORIZ_RIGHT : 0)
196 |(fullh || fp->g.y<=max_geom.y ? SIZEPOLICY_VERT_TOP : 0)
197 |(fullh || fp->g.y+fp->g.h>=max_geom.y+max_geom.h ? SIZEPOLICY_VERT_BOTTOM : 0));
201 void sizepolicy(WSizePolicy *szplcy, WRegion *reg,
202 const WRectangle *rq_geom, int rq_flags,
205 uint extra=fp->mode®ION_FIT_ROTATE;
211 tmp=REGION_GEOM(reg);
215 if((*szplcy)&SIZEPOLICY_SHRUNK){
217 tmp.w=region_min_w(reg);
218 tmp.h=region_min_h(reg);
223 rq_flags&=~(REGION_RQGEOM_WEAK_W|REGION_RQGEOM_WEAK_H);
226 fp->mode=REGION_FIT_EXACT|extra;
228 switch((*szplcy)&SIZEPOLICY_MASK){
229 case SIZEPOLICY_GRAVITY:
230 gravity_stretch_policy(*szplcy, reg, &tmp, fp, FALSE, FALSE);
233 case SIZEPOLICY_STRETCH_LEFT:
234 gravity_stretch_policy(SIZEPOLICY_HORIZ_LEFT|SIZEPOLICY_VERT_CENTER,
235 reg, &tmp, fp, FALSE, TRUE);
238 case SIZEPOLICY_STRETCH_RIGHT:
239 gravity_stretch_policy(SIZEPOLICY_HORIZ_RIGHT|SIZEPOLICY_VERT_CENTER,
240 reg, &tmp, fp, FALSE, TRUE);
243 case SIZEPOLICY_STRETCH_TOP:
244 gravity_stretch_policy(SIZEPOLICY_VERT_TOP|SIZEPOLICY_HORIZ_CENTER,
245 reg, &tmp, fp, TRUE, FALSE);
248 case SIZEPOLICY_STRETCH_BOTTOM:
249 gravity_stretch_policy(SIZEPOLICY_VERT_BOTTOM|SIZEPOLICY_HORIZ_CENTER,
250 reg, &tmp, fp, TRUE, FALSE);
253 case SIZEPOLICY_FULL_EXACT:
254 gravity_stretch_policy(SIZEPOLICY_VERT_CENTER|SIZEPOLICY_HORIZ_CENTER,
255 reg, &tmp, fp, TRUE, TRUE);
258 case SIZEPOLICY_FREE:
259 rectangle_constrain(&tmp, &(fp->g));
261 region_size_hints_correct(reg, &tmp.w, &tmp.h, FALSE);
265 case SIZEPOLICY_UNCONSTRAINED:
267 region_size_hints_correct(reg, &tmp.w, &tmp.h, TRUE);
271 case SIZEPOLICY_FREE_GLUE:
272 sizepolicy_free_snap(szplcy, reg, &tmp, rq_flags, fp);
275 case SIZEPOLICY_FULL_BOUNDS:
277 fp->mode=REGION_FIT_BOUNDS|extra;
283 /* translation table for sizepolicy specifications */
284 static StringIntMap szplcy_specs[] = {
285 {"default", SIZEPOLICY_DEFAULT},
286 {"full", SIZEPOLICY_FULL_EXACT},
287 {"full_bounds", SIZEPOLICY_FULL_BOUNDS},
288 {"free", SIZEPOLICY_FREE},
289 {"free_glue", SIZEPOLICY_FREE_GLUE},
290 {"northwest", SIZEPOLICY_GRAVITY_NORTHWEST},
291 {"north", SIZEPOLICY_GRAVITY_NORTH},
292 {"northeast", SIZEPOLICY_GRAVITY_NORTHEAST},
293 {"west", SIZEPOLICY_GRAVITY_WEST},
294 {"center", SIZEPOLICY_GRAVITY_CENTER},
295 {"east", SIZEPOLICY_GRAVITY_EAST},
296 {"southwest", SIZEPOLICY_GRAVITY_SOUTHWEST},
297 {"south", SIZEPOLICY_GRAVITY_SOUTH},
298 {"southeast", SIZEPOLICY_GRAVITY_SOUTHEAST},
299 {"stretch_top", SIZEPOLICY_STRETCH_TOP},
300 {"stretch_bottom", SIZEPOLICY_STRETCH_BOTTOM},
301 {"stretch_left", SIZEPOLICY_STRETCH_LEFT},
302 {"stretch_right", SIZEPOLICY_STRETCH_RIGHT},
303 {"free_glue_northwest", SIZEPOLICY_FREE_GLUE__NORTHWEST},
304 {"free_glue_north", SIZEPOLICY_FREE_GLUE__NORTH},
305 {"free_glue_northeast", SIZEPOLICY_FREE_GLUE__NORTHEAST},
306 {"free_glue_west", SIZEPOLICY_FREE_GLUE__WEST},
307 {"free_glue_center", SIZEPOLICY_FREE_GLUE__CENTER},
308 {"free_glue_east", SIZEPOLICY_FREE_GLUE__EAST},
309 {"free_glue_southwest", SIZEPOLICY_FREE_GLUE__SOUTHWEST},
310 {"free_glue_south", SIZEPOLICY_FREE_GLUE__SOUTH},
311 {"free_glue_southeast", SIZEPOLICY_FREE_GLUE__SOUTHEAST},
312 { NULL, SIZEPOLICY_DEFAULT} /* end marker */
316 bool string2sizepolicy(const char *szplcy, WSizePolicy *value)
320 tmp=stringintmap_value(szplcy_specs, szplcy, -1);
323 *value=SIZEPOLICY_DEFAULT;
332 const char *sizepolicy2string(WSizePolicy szplcy)
334 return stringintmap_key(szplcy_specs, szplcy, NULL);