Annotation of src/usr.bin/tmux/grid.c, Revision 1.15
1.15 ! nicm 1: /* $OpenBSD: grid.c,v 1.14 2009/09/15 15:14:09 nicm Exp $ */
1.1 nicm 2:
3: /*
4: * Copyright (c) 2008 Nicholas Marriott <nicm@users.sourceforge.net>
5: *
6: * Permission to use, copy, modify, and distribute this software for any
7: * purpose with or without fee is hereby granted, provided that the above
8: * copyright notice and this permission notice appear in all copies.
9: *
10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14: * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
15: * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
16: * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17: */
18:
19: #include <sys/types.h>
20:
21: #include <string.h>
22:
23: #include "tmux.h"
24:
25: /*
26: * Grid data. This is the basic data structure that represents what is shown on
27: * screen.
28: *
29: * A grid is a grid of cells (struct grid_cell). Lines are not allocated until
30: * cells in that line are written to. The grid is split into history and
31: * viewable data with the history starting at row (line) 0 and extending to
32: * (hsize - 1); from hsize to hsize + (sy - 1) is the viewable data. All
33: * functions in this file work on absolute coordinates, grid-view.c has
34: * functions which work on the screen data.
35: */
36:
37: /* Default grid cell data. */
38: const struct grid_cell grid_default_cell = { 0, 0, 8, 8, ' ' };
39:
40: #define grid_put_cell(gd, px, py, gc) do { \
1.10 nicm 41: memcpy(&gd->linedata[py].celldata[px], \
42: gc, sizeof gd->linedata[py].celldata[px]); \
1.1 nicm 43: } while (0)
44: #define grid_put_utf8(gd, px, py, gc) do { \
1.10 nicm 45: memcpy(&gd->linedata[py].utf8data[px], \
46: gc, sizeof gd->linedata[py].utf8data[px]); \
1.1 nicm 47: } while (0)
48:
49: int grid_check_x(struct grid *, u_int);
50: int grid_check_y(struct grid *, u_int);
51:
52: #ifdef DEBUG
53: int
54: grid_check_x(struct grid *gd, u_int px)
55: {
56: if ((px) >= (gd)->sx)
57: log_fatalx("x out of range: %u", px);
58: return (0);
59: }
60:
61: int
62: grid_check_y(struct grid *gd, u_int py)
63: {
64: if ((py) >= (gd)->hsize + (gd)->sy)
65: log_fatalx("y out of range: %u", py);
66: return (0);
67: }
68: #else
69: int
70: grid_check_x(struct grid *gd, u_int px)
71: {
72: if ((px) >= (gd)->sx) {
73: log_debug("x out of range: %u", px);
74: return (-1);
75: }
76: return (0);
77: }
78:
79: int
80: grid_check_y(struct grid *gd, u_int py)
81: {
82: if ((py) >= (gd)->hsize + (gd)->sy) {
83: log_debug("y out of range: %u", py);
84: return (-1);
85: }
86: return (0);
87: }
88: #endif
89:
90: /* Create a new grid. */
91: struct grid *
92: grid_create(u_int sx, u_int sy, u_int hlimit)
93: {
94: struct grid *gd;
95:
96: gd = xmalloc(sizeof *gd);
97: gd->sx = sx;
98: gd->sy = sy;
99:
1.7 nicm 100: gd->flags = GRID_HISTORY;
101:
1.1 nicm 102: gd->hsize = 0;
103: gd->hlimit = hlimit;
104:
1.10 nicm 105: gd->linedata = xcalloc(gd->sy, sizeof *gd->linedata);
1.1 nicm 106:
107: return (gd);
108: }
109:
110: /* Destroy grid. */
111: void
112: grid_destroy(struct grid *gd)
113: {
1.10 nicm 114: struct grid_line *gl;
115: u_int yy;
1.1 nicm 116:
117: for (yy = 0; yy < gd->hsize + gd->sy; yy++) {
1.10 nicm 118: gl = &gd->linedata[yy];
119: if (gl->celldata != NULL)
120: xfree(gl->celldata);
121: if (gl->utf8data != NULL)
122: xfree(gl->utf8data);
1.1 nicm 123: }
124:
1.10 nicm 125: xfree(gd->linedata);
1.1 nicm 126:
127: xfree(gd);
128: }
129:
130: /* Compare grids. */
131: int
132: grid_compare(struct grid *ga, struct grid *gb)
133: {
1.10 nicm 134: struct grid_line *gla, *glb;
1.1 nicm 135: struct grid_cell *gca, *gcb;
136: struct grid_utf8 *gua, *gub;
137: u_int xx, yy;
138:
139: if (ga->sx != gb->sx || ga->sy != ga->sy)
140: return (1);
141:
142: for (yy = 0; yy < ga->sy; yy++) {
1.10 nicm 143: gla = &ga->linedata[yy];
144: glb = &gb->linedata[yy];
145: if (gla->cellsize != glb->cellsize)
1.1 nicm 146: return (1);
147: for (xx = 0; xx < ga->sx; xx++) {
1.10 nicm 148: gca = &gla->celldata[xx];
149: gcb = &glb->celldata[xx];
1.1 nicm 150: if (memcmp(gca, gcb, sizeof (struct grid_cell)) != 0)
151: return (1);
152: if (!(gca->flags & GRID_FLAG_UTF8))
153: continue;
1.10 nicm 154: gua = &gla->utf8data[xx];
155: gub = &glb->utf8data[xx];
1.1 nicm 156: if (memcmp(gua, gub, sizeof (struct grid_utf8)) != 0)
157: return (1);
158: }
159: }
160:
161: return (0);
162: }
163:
1.15 ! nicm 164: /*
! 165: * Collect lines from the history if at the limit. Free the top (oldest) 10%
! 166: * and shift up.
! 167: */
1.1 nicm 168: void
1.15 ! nicm 169: grid_collect_history(struct grid *gd)
1.1 nicm 170: {
171: u_int yy;
172:
173: GRID_DEBUG(gd, "");
174:
1.15 ! nicm 175: if (gd->hsize < gd->hlimit)
! 176: return;
! 177:
! 178: yy = gd->hlimit / 10;
! 179: if (yy < 1)
! 180: yy = 1;
! 181:
! 182: grid_move_lines(gd, 0, yy, gd->hsize + gd->sy - yy);
! 183: gd->hsize -= yy;
! 184: }
! 185:
! 186: /*
! 187: * Scroll the entire visible screen, moving one line into the history. Just
! 188: * allocate a new line at the bottom and move the history size indicator.
! 189: */
! 190: void
! 191: grid_scroll_history(struct grid *gd)
! 192: {
! 193: u_int yy;
1.1 nicm 194:
1.15 ! nicm 195: GRID_DEBUG(gd, "");
1.1 nicm 196:
197: yy = gd->hsize + gd->sy;
1.15 ! nicm 198: gd->linedata = xrealloc(gd->linedata, yy + 1, sizeof *gd->linedata);
! 199: memset(&gd->linedata[yy], 0, sizeof gd->linedata[yy]);
! 200:
! 201: gd->hsize++;
! 202: }
1.1 nicm 203:
1.15 ! nicm 204: /* Scroll a region up, moving the top line into the history. */
! 205: void
! 206: grid_scroll_history_region(struct grid *gd, u_int upper, u_int lower)
! 207: {
! 208: struct grid_line *gl_history, *gl_upper, *gl_lower;
! 209: u_int yy;
! 210:
! 211: GRID_DEBUG(gd, "upper=%u, lower=%u", upper, lower);
! 212:
! 213: /* Create a space for a new line. */
! 214: yy = gd->hsize + gd->sy;
1.10 nicm 215: gd->linedata = xrealloc(gd->linedata, yy + 1, sizeof *gd->linedata);
1.1 nicm 216:
1.15 ! nicm 217: /* Move the entire screen down to free a space for this line. */
! 218: gl_history = &gd->linedata[gd->hsize];
! 219: memmove(gl_history + 1, gl_history, gd->sy * sizeof *gl_history);
! 220:
! 221: /* Adjust the region and find its start and end. */
! 222: upper++;
! 223: gl_upper = &gd->linedata[upper];
! 224: lower++;
! 225: gl_lower = &gd->linedata[lower];
! 226:
! 227: /* Move the line into the history. */
! 228: memcpy(gl_history, gl_upper, sizeof *gl_history);
! 229:
! 230: /* Then move the region up and clear the bottom line. */
! 231: memmove(gl_upper, gl_upper + 1, (lower - upper) * sizeof *gl_upper);
! 232: memset(gl_lower, 0, sizeof *gl_lower);
! 233:
! 234: /* Move the history offset down over the line. */
1.1 nicm 235: gd->hsize++;
236: }
237:
238: /* Expand line to fit to cell. */
239: void
1.14 nicm 240: grid_expand_line(struct grid *gd, u_int py, u_int sx)
1.1 nicm 241: {
1.10 nicm 242: struct grid_line *gl;
1.14 nicm 243: u_int xx;
1.1 nicm 244:
1.10 nicm 245: gl = &gd->linedata[py];
1.14 nicm 246: if (sx <= gl->cellsize)
1.1 nicm 247: return;
248:
1.10 nicm 249: gl->celldata = xrealloc(gl->celldata, sx, sizeof *gl->celldata);
250: for (xx = gl->cellsize; xx < sx; xx++)
1.1 nicm 251: grid_put_cell(gd, xx, py, &grid_default_cell);
1.10 nicm 252: gl->cellsize = sx;
1.1 nicm 253: }
254:
255: /* Expand line to fit to cell for UTF-8. */
256: void
257: grid_expand_line_utf8(struct grid *gd, u_int py, u_int sx)
258: {
1.10 nicm 259: struct grid_line *gl;
260:
261: gl = &gd->linedata[py];
262: if (sx <= gl->utf8size)
1.1 nicm 263: return;
264:
1.10 nicm 265: gl->utf8data = xrealloc(gl->utf8data, sx, sizeof *gl->utf8data);
266: gl->utf8size = sx;
1.1 nicm 267: }
268:
269: /* Get cell for reading. */
270: const struct grid_cell *
271: grid_peek_cell(struct grid *gd, u_int px, u_int py)
272: {
273: if (grid_check_x(gd, px) != 0)
274: return (&grid_default_cell);
275: if (grid_check_y(gd, py) != 0)
276: return (&grid_default_cell);
277:
1.10 nicm 278: if (px >= gd->linedata[py].cellsize)
1.1 nicm 279: return (&grid_default_cell);
1.10 nicm 280: return (&gd->linedata[py].celldata[px]);
1.1 nicm 281: }
282:
283: /* Get cell at relative position (for writing). */
284: struct grid_cell *
285: grid_get_cell(struct grid *gd, u_int px, u_int py)
286: {
287: if (grid_check_x(gd, px) != 0)
288: return (NULL);
289: if (grid_check_y(gd, py) != 0)
290: return (NULL);
291:
292: grid_expand_line(gd, py, px + 1);
1.10 nicm 293: return (&gd->linedata[py].celldata[px]);
1.1 nicm 294: }
295:
296: /* Set cell at relative position. */
297: void
298: grid_set_cell(
299: struct grid *gd, u_int px, u_int py, const struct grid_cell *gc)
300: {
301: if (grid_check_x(gd, px) != 0)
302: return;
303: if (grid_check_y(gd, py) != 0)
304: return;
305:
306: grid_expand_line(gd, py, px + 1);
307: grid_put_cell(gd, px, py, gc);
308: }
309:
310: /* Get UTF-8 for reading. */
311: const struct grid_utf8 *
312: grid_peek_utf8(struct grid *gd, u_int px, u_int py)
313: {
314: if (grid_check_x(gd, px) != 0)
315: return (NULL);
316: if (grid_check_y(gd, py) != 0)
317: return (NULL);
318:
1.10 nicm 319: if (px >= gd->linedata[py].utf8size)
1.1 nicm 320: return (NULL);
1.10 nicm 321: return (&gd->linedata[py].utf8data[px]);
1.1 nicm 322: }
323:
324: /* Get utf8 at relative position (for writing). */
325: struct grid_utf8 *
326: grid_get_utf8(struct grid *gd, u_int px, u_int py)
327: {
328: if (grid_check_x(gd, px) != 0)
329: return (NULL);
330: if (grid_check_y(gd, py) != 0)
331: return (NULL);
332:
333: grid_expand_line_utf8(gd, py, px + 1);
1.10 nicm 334: return (&gd->linedata[py].utf8data[px]);
1.1 nicm 335: }
336:
337: /* Set utf8 at relative position. */
338: void
339: grid_set_utf8(
340: struct grid *gd, u_int px, u_int py, const struct grid_utf8 *gc)
341: {
342: if (grid_check_x(gd, px) != 0)
343: return;
344: if (grid_check_y(gd, py) != 0)
345: return;
346:
347: grid_expand_line_utf8(gd, py, px + 1);
348: grid_put_utf8(gd, px, py, gc);
349: }
350:
1.14 nicm 351: /* Clear area. */
1.1 nicm 352: void
353: grid_clear(struct grid *gd, u_int px, u_int py, u_int nx, u_int ny)
354: {
355: u_int xx, yy;
356:
357: GRID_DEBUG(gd, "px=%u, py=%u, nx=%u, ny=%u", px, py, nx, ny);
358:
359: if (nx == 0 || ny == 0)
360: return;
361:
362: if (px == 0 && nx == gd->sx) {
363: grid_clear_lines(gd, py, ny);
364: return;
365: }
366:
367: if (grid_check_x(gd, px) != 0)
368: return;
369: if (grid_check_x(gd, px + nx - 1) != 0)
370: return;
371: if (grid_check_y(gd, py) != 0)
372: return;
373: if (grid_check_y(gd, py + ny - 1) != 0)
374: return;
375:
376: for (yy = py; yy < py + ny; yy++) {
1.14 nicm 377: if (px >= gd->linedata[yy].cellsize)
378: continue;
379: if (px + nx >= gd->linedata[yy].cellsize) {
380: gd->linedata[yy].cellsize = px;
381: continue;
382: }
1.1 nicm 383: for (xx = px; xx < px + nx; xx++) {
1.10 nicm 384: if (xx >= gd->linedata[yy].cellsize)
1.1 nicm 385: break;
386: grid_put_cell(gd, xx, yy, &grid_default_cell);
387: }
388: }
389: }
390:
391: /* Clear lines. This just frees and truncates the lines. */
392: void
393: grid_clear_lines(struct grid *gd, u_int py, u_int ny)
394: {
1.10 nicm 395: struct grid_line *gl;
396: u_int yy;
1.1 nicm 397:
398: GRID_DEBUG(gd, "py=%u, ny=%u", py, ny);
399:
400: if (ny == 0)
401: return;
402:
403: if (grid_check_y(gd, py) != 0)
404: return;
405: if (grid_check_y(gd, py + ny - 1) != 0)
406: return;
407:
408: for (yy = py; yy < py + ny; yy++) {
1.10 nicm 409: gl = &gd->linedata[yy];
410: if (gl->celldata != NULL)
411: xfree(gl->celldata);
412: if (gl->utf8data != NULL)
413: xfree(gl->utf8data);
414: memset(gl, 0, sizeof *gl);
1.1 nicm 415: }
416: }
417:
418: /* Move a group of lines. */
419: void
420: grid_move_lines(struct grid *gd, u_int dy, u_int py, u_int ny)
421: {
422: u_int yy;
423:
424: GRID_DEBUG(gd, "dy=%u, py=%u, ny=%u", dy, py, ny);
425:
426: if (ny == 0 || py == dy)
427: return;
428:
429: if (grid_check_y(gd, py) != 0)
430: return;
431: if (grid_check_y(gd, py + ny - 1) != 0)
432: return;
433: if (grid_check_y(gd, dy) != 0)
434: return;
435: if (grid_check_y(gd, dy + ny - 1) != 0)
436: return;
437:
438: /* Free any lines which are being replaced. */
439: for (yy = dy; yy < dy + ny; yy++) {
440: if (yy >= py && yy < py + ny)
441: continue;
442: grid_clear_lines(gd, yy, 1);
443: }
444:
1.10 nicm 445: memmove(
446: &gd->linedata[dy], &gd->linedata[py], ny * (sizeof *gd->linedata));
1.1 nicm 447:
448: /* Wipe any lines that have been moved (without freeing them). */
449: for (yy = py; yy < py + ny; yy++) {
450: if (yy >= dy && yy < dy + ny)
451: continue;
1.10 nicm 452: memset(&gd->linedata[yy], 0, sizeof gd->linedata[yy]);
1.1 nicm 453: }
454: }
455:
456: /* Move a group of cells. */
457: void
458: grid_move_cells(struct grid *gd, u_int dx, u_int px, u_int py, u_int nx)
459: {
1.10 nicm 460: struct grid_line *gl;
461: u_int xx;
1.1 nicm 462:
463: GRID_DEBUG(gd, "dx=%u, px=%u, py=%u, nx=%u", dx, px, py, nx);
464:
465: if (nx == 0 || px == dx)
466: return;
467:
468: if (grid_check_x(gd, px) != 0)
469: return;
470: if (grid_check_x(gd, px + nx - 1) != 0)
471: return;
472: if (grid_check_x(gd, dx + nx - 1) != 0)
473: return;
474: if (grid_check_y(gd, py) != 0)
475: return;
1.10 nicm 476: gl = &gd->linedata[py];
1.1 nicm 477:
478: grid_expand_line(gd, py, px + nx);
479: grid_expand_line(gd, py, dx + nx);
1.10 nicm 480: memmove(
481: &gl->celldata[dx], &gl->celldata[px], nx * sizeof *gl->celldata);
1.1 nicm 482:
1.10 nicm 483: if (gl->utf8data != NULL) {
1.1 nicm 484: grid_expand_line_utf8(gd, py, px + nx);
485: grid_expand_line_utf8(gd, py, dx + nx);
1.10 nicm 486: memmove(&gl->utf8data[dx],
487: &gl->utf8data[px], nx * sizeof *gl->utf8data);
1.1 nicm 488: }
489:
490: /* Wipe any cells that have been moved. */
491: for (xx = px; xx < px + nx; xx++) {
492: if (xx >= dx && xx < dx + nx)
493: continue;
494: grid_put_cell(gd, xx, py, &grid_default_cell);
495: }
1.3 nicm 496: }
497:
498: /* Convert cells into a string. */
499: char *
500: grid_string_cells(struct grid *gd, u_int px, u_int py, u_int nx)
501: {
502: const struct grid_cell *gc;
503: const struct grid_utf8 *gu;
504: char *buf;
505: size_t len, off;
1.4 nicm 506: u_int xx, i;
1.3 nicm 507:
508: GRID_DEBUG(gd, "px=%u, py=%u, nx=%u", px, py, nx);
509:
510: len = 128;
511: buf = xmalloc(len);
512: off = 0;
513:
514: for (xx = px; xx < px + nx; xx++) {
515: gc = grid_peek_cell(gd, xx, py);
516: if (gc->flags & GRID_FLAG_PADDING)
517: continue;
518:
519: if (gc->flags & GRID_FLAG_UTF8) {
520: while (len < off + UTF8_SIZE + 1) {
521: buf = xrealloc(buf, 2, len);
522: len *= 2;
523: }
524:
525: gu = grid_peek_utf8(gd, xx, py);
1.4 nicm 526: for (i = 0; i < UTF8_SIZE; i++) {
527: if (gu->data[i] == 0xff)
528: break;
529: buf[off++] = gu->data[i];
530: }
1.3 nicm 531: } else {
532: while (len < off + 2) {
533: buf = xrealloc(buf, 2, len);
534: len *= 2;
535: }
536:
537: buf[off++] = gc->data;
538: }
539: }
1.4 nicm 540:
541: while (off > 0 && buf[off - 1] == ' ')
542: off--;
1.3 nicm 543: buf[off] = '\0';
544: return (buf);
1.7 nicm 545: }
546:
547: /*
548: * Duplicate a set of lines between two grids. If there aren't enough lines in
549: * either source or destination, the number of lines is limited to the number
550: * available.
551: */
552: void
553: grid_duplicate_lines(
554: struct grid *dst, u_int dy, struct grid *src, u_int sy, u_int ny)
555: {
1.10 nicm 556: struct grid_line *dstl, *srcl;
557: u_int yy;
1.7 nicm 558:
559: GRID_DEBUG(src, "dy=%u, sy=%u, ny=%u", dy, sy, ny);
560:
561: if (dy + ny > dst->hsize + dst->sy)
562: ny = dst->hsize + dst->sy - dy;
563: if (sy + ny > src->hsize + src->sy)
564: ny = src->hsize + src->sy - sy;
565: grid_clear_lines(dst, dy, ny);
566:
567: for (yy = 0; yy < ny; yy++) {
1.11 nicm 568: srcl = &src->linedata[sy];
569: dstl = &dst->linedata[dy];
1.10 nicm 570:
571: memcpy(dstl, srcl, sizeof *dstl);
572: if (srcl->cellsize != 0) {
573: dstl->celldata = xcalloc(
574: srcl->cellsize, sizeof *dstl->celldata);
575: memcpy(dstl->celldata, srcl->celldata,
576: srcl->cellsize * sizeof *dstl->celldata);
1.7 nicm 577: }
1.10 nicm 578: if (srcl->utf8size != 0) {
579: dstl->utf8data = xcalloc(
580: srcl->utf8size, sizeof *dstl->utf8data);
581: memcpy(dstl->utf8data, srcl->utf8data,
582: srcl->utf8size * sizeof *dstl->utf8data);
1.7 nicm 583: }
584:
1.10 nicm 585: sy++;
586: dy++;
1.7 nicm 587: }
1.1 nicm 588: }
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