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Date:: Tue Sep 30 17:47:44 2003 UTC
Message:: Initial revision
Actions:: History | Blame | Raw File
1 #include <u.h>
2 #include <libc.h>
3 #include <draw.h>
4 #include <thread.h>
5 #include <mouse.h>
6 #include <cursor.h>
7 #include <keyboard.h>
8 #include <frame.h>
9 #include "flayer.h"
10 #include "samterm.h"
11 
12 #define	DELTA	10
13 
14 static Flayer	**llist;	/* front to back */
15 static int	nllist;
16 static int	nlalloc;
17 static Rectangle lDrect;
18 
19 Vis		visibility(Flayer *);
20 void		newvisibilities(int);
21 void		llinsert(Flayer*);
22 void		lldelete(Flayer*);
23 
24 Image	*maincols[NCOL];
25 Image	*cmdcols[NCOL];
26 
27 void
28 flstart(Rectangle r)
29 {
30 	lDrect = r;
31 
32 	/* Main text is yellowish */
33 	maincols[BACK] = allocimagemix(display, DPaleyellow, DWhite);
34 	maincols[HIGH] = allocimage(display, Rect(0,0,1,1), screen->chan, 1, DDarkyellow);
35 	maincols[BORD] = allocimage(display, Rect(0,0,2,2), screen->chan, 1, DYellowgreen);
36 	maincols[TEXT] = display->black;
37 	maincols[HTEXT] = display->black;
38 
39 	/* Command text is blueish */
40 	cmdcols[BACK] = allocimagemix(display, DPalebluegreen, DWhite);
41 	cmdcols[HIGH] = allocimage(display, Rect(0,0,1,1), screen->chan, 1, DPalegreygreen);
42 	cmdcols[BORD] = allocimage(display, Rect(0,0,2,2), screen->chan, 1, DPurpleblue);
43 	cmdcols[TEXT] = display->black;
44 	cmdcols[HTEXT] = display->black;
45 }
46 
47 void
48 flnew(Flayer *l, Rune *(*fn)(Flayer*, long, ulong*), int u0, void *u1)
49 {
50 	if(nllist == nlalloc){
51 		nlalloc += DELTA;
52 		llist = realloc(llist, nlalloc*sizeof(Flayer**));
53 		if(llist == 0)
54 			panic("flnew");
55 	}
56 	l->textfn = fn;
57 	l->user0 = u0;
58 	l->user1 = u1;
59 	l->lastsr = ZR;
60 	llinsert(l);
61 }
62 
63 Rectangle
64 flrect(Flayer *l, Rectangle r)
65 {
66 	rectclip(&r, lDrect);
67 	l->entire = r;
68 	l->scroll = insetrect(r, FLMARGIN);
69 	r.min.x =
70 	 l->scroll.max.x = r.min.x+FLMARGIN+FLSCROLLWID+(FLGAP-FLMARGIN);
71 	return r;
72 }
73 
74 void
75 flinit(Flayer *l, Rectangle r, Font *ft, Image **cols)
76 {
77 	lldelete(l);
78 	llinsert(l);
79 	l->visible = All;
80 	l->origin = l->p0 = l->p1 = 0;
81 	frinit(&l->f, insetrect(flrect(l, r), FLMARGIN), ft, screen, cols);
82 	l->f.maxtab = maxtab*stringwidth(ft, "0");
83 	newvisibilities(1);
84 	draw(screen, l->entire, l->f.cols[BACK], nil, ZP);
85 	scrdraw(l, 0L);
86 	flborder(l, 0);
87 }
88 
89 void
90 flclose(Flayer *l)
91 {
92 	if(l->visible == All)
93 		draw(screen, l->entire, display->white, nil, ZP);
94 	else if(l->visible == Some){
95 		if(l->f.b == 0)
96 			l->f.b = allocimage(display, l->entire, screen->chan, 0, DNofill);
97 		if(l->f.b){
98 			draw(l->f.b, l->entire, display->white, nil, ZP);
99 			flrefresh(l, l->entire, 0);
100 		}
101 	}
102 	frclear(&l->f, 1);
103 	lldelete(l);
104 	if(l->f.b && l->visible!=All)
105 		freeimage(l->f.b);
106 	l->textfn = 0;
107 	newvisibilities(1);
108 }
109 
110 void
111 flborder(Flayer *l, int wide)
112 {
113 	if(flprepare(l)){
114 		border(l->f.b, l->entire, FLMARGIN, l->f.cols[BACK], ZP);
115 		border(l->f.b, l->entire, wide? FLMARGIN : 1, l->f.cols[BORD], ZP);
116 		if(l->visible==Some)
117 			flrefresh(l, l->entire, 0);
118 	}
119 }
120 
121 Flayer *
122 flwhich(Point p)
123 {
124 	int i;
125 
126 	if(p.x==0 && p.y==0)
127 		return nllist? llist[0] : 0;
128 	for(i=0; i<nllist; i++)
129 		if(ptinrect(p, llist[i]->entire))
130 			return llist[i];
131 	return 0;
132 }
133 
134 void
135 flupfront(Flayer *l)
136 {
137 	int v = l->visible;
138 
139 	lldelete(l);
140 	llinsert(l);
141 	if(v!=All)
142 		newvisibilities(0);
143 }
144 
145 void
146 newvisibilities(int redraw)
147 	/* if redraw false, we know it's a flupfront, and needn't
148 	 * redraw anyone becoming partially covered */
149 {
150 	int i;
151 	Vis ov;
152 	Flayer *l;
153 
154 	for(i = 0; i<nllist; i++){
155 		l = llist[i];
156 		l->lastsr = ZR;	/* make sure scroll bar gets redrawn */
157 		ov = l->visible;
158 		l->visible = visibility(l);
159 #define	V(a, b)	(((a)<<2)|((b)))
160 		switch(V(ov, l->visible)){
161 		case V(Some, None):
162 			if(l->f.b)
163 				freeimage(l->f.b);
164 		case V(All, None):
165 		case V(All, Some):
166 			l->f.b = 0;
167 			frclear(&l->f, 0);
168 			break;
169 
170 		case V(Some, Some):
171 			if(l->f.b==0 && redraw)
172 		case V(None, Some):
173 				flprepare(l);
174 			if(l->f.b && redraw){
175 				flrefresh(l, l->entire, 0);
176 				freeimage(l->f.b);
177 				l->f.b = 0;
178 				frclear(&l->f, 0);
179 			}
180 		case V(None, None):
181 		case V(All, All):
182 			break;
183 
184 		case V(Some, All):
185 			if(l->f.b){
186 				draw(screen, l->entire, l->f.b, nil, l->entire.min);
187 				freeimage(l->f.b);
188 				l->f.b = screen;
189 				break;
190 			}
191 		case V(None, All):
192 			flprepare(l);
193 			break;
194 		}
195 		if(ov==None && l->visible!=None)
196 			flnewlyvisible(l);
197 	}
198 }
199 
200 void
201 llinsert(Flayer *l)
202 {
203 	int i;
204 	for(i=nllist; i>0; --i)
205 		llist[i]=llist[i-1];
206 	llist[0]=l;
207 	nllist++;
208 }
209 
210 void
211 lldelete(Flayer *l)
212 {
213 	int i;
214 
215 	for(i=0; i<nllist; i++)
216 		if(llist[i]==l){
217 			--nllist;
218 			for(; i<nllist; i++)
219 				llist[i] = llist[i+1];
220 			return;
221 		}
222 	panic("lldelete");
223 }
224 
225 void
226 flinsert(Flayer *l, Rune *sp, Rune *ep, long p0)
227 {
228 	if(flprepare(l)){
229 		frinsert(&l->f, sp, ep, p0-l->origin);
230 		scrdraw(l, scrtotal(l));
231 		if(l->visible==Some)
232 			flrefresh(l, l->entire, 0);
233 	}
234 }
235 
236 void
237 fldelete(Flayer *l, long p0, long p1)
238 {
239 	if(flprepare(l)){
240 		p0 -= l->origin;
241 		if(p0 < 0)
242 			p0 = 0;
243 		p1 -= l->origin;
244 		if(p1<0)
245 			p1 = 0;
246 		frdelete(&l->f, p0, p1);
247 		scrdraw(l, scrtotal(l));
248 		if(l->visible==Some)
249 			flrefresh(l, l->entire, 0);
250 	}
251 }
252 
253 int
254 flselect(Flayer *l)
255 {
256 	int ret = 0;
257 	if(l->visible!=All)
258 		flupfront(l);
259 	frselect(&l->f, mousectl);
260 	if(l->f.p0==l->f.p1){
261 		if(mousep->msec-l->click<Clicktime && l->f.p0+l->origin==l->p0){
262 			ret = 1;
263 			l->click = 0;
264 		}else
265 			l->click = mousep->msec;
266 	}else
267 		l->click = 0;
268 	l->p0 = l->f.p0+l->origin, l->p1 = l->f.p1+l->origin;
269 	return ret;
270 }
271 
272 void
273 flsetselect(Flayer *l, long p0, long p1)
274 {
275 	ulong fp0, fp1;
276 
277 	l->click = 0;
278 	if(l->visible==None || !flprepare(l)){
279 		l->p0 = p0, l->p1 = p1;
280 		return;
281 	}
282 	l->p0 = p0, l->p1 = p1;
283 	flfp0p1(l, &fp0, &fp1);
284 	if(fp0==l->f.p0 && fp1==l->f.p1)
285 		return;
286 
287 	if(fp1<=l->f.p0 || fp0>=l->f.p1 || l->f.p0==l->f.p1 || fp0==fp1){
288 		/* no overlap or trivial repainting */
289 		frdrawsel(&l->f, frptofchar(&l->f, l->f.p0), l->f.p0, l->f.p1, 0);
290 		frdrawsel(&l->f, frptofchar(&l->f, fp0), fp0, fp1, 1);
291 		goto Refresh;
292 	}
293 	/* the current selection and the desired selection overlap and are both non-empty */
294 	if(fp0 < l->f.p0){
295 		/* extend selection backwards */
296 		frdrawsel(&l->f, frptofchar(&l->f, fp0), fp0, l->f.p0, 1);
297 	}else if(fp0 > l->f.p0){
298 		/* trim first part of selection */
299 		frdrawsel(&l->f, frptofchar(&l->f, l->f.p0), l->f.p0, fp0, 0);
300 	}
301 	if(fp1 > l->f.p1){
302 		/* extend selection forwards */
303 		frdrawsel(&l->f, frptofchar(&l->f, l->f.p1), l->f.p1, fp1, 1);
304 	}else if(fp1 < l->f.p1){
305 		/* trim last part of selection */
306 		frdrawsel(&l->f, frptofchar(&l->f, fp1), fp1, l->f.p1, 0);
307 	}
308 
309     Refresh:
310 	l->f.p0 = fp0;
311 	l->f.p1 = fp1;
312 	if(l->visible==Some)
313 		flrefresh(l, l->entire, 0);
314 }
315 
316 void
317 flfp0p1(Flayer *l, ulong *pp0, ulong *pp1)
318 {
319 	long p0 = l->p0-l->origin, p1 = l->p1-l->origin;
320 
321 	if(p0 < 0)
322 		p0 = 0;
323 	if(p1 < 0)
324 		p1 = 0;
325 	if(p0 > l->f.nchars)
326 		p0 = l->f.nchars;
327 	if(p1 > l->f.nchars)
328 		p1 = l->f.nchars;
329 	*pp0 = p0;
330 	*pp1 = p1;
331 }
332 
333 Rectangle
334 rscale(Rectangle r, Point old, Point new)
335 {
336 	r.min.x = r.min.x*new.x/old.x;
337 	r.min.y = r.min.y*new.y/old.y;
338 	r.max.x = r.max.x*new.x/old.x;
339 	r.max.y = r.max.y*new.y/old.y;
340 	return r;
341 }
342 
343 void
344 flresize(Rectangle dr)
345 {
346 	int i;
347 	Flayer *l;
348 	Frame *f;
349 	Rectangle r, olDrect;
350 	int move;
351 
352 	olDrect = lDrect;
353 	lDrect = dr;
354 	move = 0;
355 	/* no moving on rio; must repaint */
356 	if(0 && Dx(dr)==Dx(olDrect) && Dy(dr)==Dy(olDrect))
357 		move = 1;
358 	else
359 		draw(screen, lDrect, display->white, nil, ZP);
360 	for(i=0; i<nllist; i++){
361 		l = llist[i];
362 		l->lastsr = ZR;
363 		f = &l->f;
364 		if(move)
365 			r = rectaddpt(rectsubpt(l->entire, olDrect.min), dr.min);
366 		else{
367 			r = rectaddpt(rscale(rectsubpt(l->entire, olDrect.min),
368 				subpt(olDrect.max, olDrect.min),
369 				subpt(dr.max, dr.min)), dr.min);
370 			if(l->visible==Some && f->b){
371 				freeimage(f->b);
372 				frclear(f, 0);
373 			}
374 			f->b = 0;
375 			if(l->visible!=None)
376 				frclear(f, 0);
377 		}
378 		if(!rectclip(&r, dr))
379 			panic("flresize");
380 		if(r.max.x-r.min.x<100)
381 			r.min.x = dr.min.x;
382 		if(r.max.x-r.min.x<100)
383 			r.max.x = dr.max.x;
384 		if(r.max.y-r.min.y<2*FLMARGIN+f->font->height)
385 			r.min.y = dr.min.y;
386 		if(r.max.y-r.min.y<2*FLMARGIN+f->font->height)
387 			r.max.y = dr.max.y;
388 		if(!move)
389 			l->visible = None;
390 		frsetrects(f, insetrect(flrect(l, r), FLMARGIN), f->b);
391 		if(!move && f->b)
392 			scrdraw(l, scrtotal(l));
393 	}
394 	newvisibilities(1);
395 }
396 
397 int
398 flprepare(Flayer *l)
399 {
400 	Frame *f;
401 	ulong n;
402 	Rune *r;
403 
404 	if(l->visible == None)
405 		return 0;
406 	f = &l->f;
407 	if(f->b == 0){
408 		if(l->visible == All)
409 			f->b = screen;
410 		else if((f->b = allocimage(display, l->entire, screen->chan, 0, 0))==0)
411 			return 0;
412 		draw(f->b, l->entire, f->cols[BACK], nil, ZP);
413 		border(f->b, l->entire, l==llist[0]? FLMARGIN : 1, f->cols[BORD], ZP);
414 		n = f->nchars;
415 		frinit(f, f->entire, f->font, f->b, 0);
416 		f->maxtab = maxtab*stringwidth(f->font, "0");
417 		r = (*l->textfn)(l, n, &n);
418 		frinsert(f, r, r+n, (ulong)0);
419 		frdrawsel(f, frptofchar(f, f->p0), f->p0, f->p1, 0);
420 		flfp0p1(l, &f->p0, &f->p1);
421 		frdrawsel(f, frptofchar(f, f->p0), f->p0, f->p1, 1);
422 		l->lastsr = ZR;
423 		scrdraw(l, scrtotal(l));
424 	}
425 	return 1;
426 }
427 
428 static	int	somevis, someinvis, justvis;
429 
430 Vis
431 visibility(Flayer *l)
432 {
433 	somevis = someinvis = 0;
434 	justvis = 1;
435 	flrefresh(l, l->entire, 0);
436 	justvis = 0;
437 	if(somevis==0)
438 		return None;
439 	if(someinvis==0)
440 		return All;
441 	return Some;
442 }
443 
444 void
445 flrefresh(Flayer *l, Rectangle r, int i)
446 {
447 	Flayer *t;
448 	Rectangle s;
449 
450     Top:
451 	if((t=llist[i++]) == l){
452 		if(!justvis)
453 			draw(screen, r, l->f.b, nil, r.min);
454 		somevis = 1;
455 	}else{
456 		if(!rectXrect(t->entire, r))
457 			goto Top;	/* avoid stacking unnecessarily */
458 		if(t->entire.min.x>r.min.x){
459 			s = r;
460 			s.max.x = t->entire.min.x;
461 			flrefresh(l, s, i);
462 			r.min.x = t->entire.min.x;
463 		}
464 		if(t->entire.min.y>r.min.y){
465 			s = r;
466 			s.max.y = t->entire.min.y;
467 			flrefresh(l, s, i);
468 			r.min.y = t->entire.min.y;
469 		}
470 		if(t->entire.max.x<r.max.x){
471 			s = r;
472 			s.min.x = t->entire.max.x;
473 			flrefresh(l, s, i);
474 			r.max.x = t->entire.max.x;
475 		}
476 		if(t->entire.max.y<r.max.y){
477 			s = r;
478 			s.min.y = t->entire.max.y;
479 			flrefresh(l, s, i);
480 			r.max.y = t->entire.max.y;
481 		}
482 		/* remaining piece of r is blocked by t; forget about it */
483 		someinvis = 1;
484 	}
485 }