st-scrollback-20210507-4536f46.diff (8916B)
1 diff --git a/config.def.h b/config.def.h 2 index 6f05dce..93cbcc0 100644 3 --- a/config.def.h 4 +++ b/config.def.h 5 @@ -199,6 +199,8 @@ static Shortcut shortcuts[] = { 6 { TERMMOD, XK_Y, selpaste, {.i = 0} }, 7 { ShiftMask, XK_Insert, selpaste, {.i = 0} }, 8 { TERMMOD, XK_Num_Lock, numlock, {.i = 0} }, 9 + { ShiftMask, XK_Page_Up, kscrollup, {.i = -1} }, 10 + { ShiftMask, XK_Page_Down, kscrolldown, {.i = -1} }, 11 }; 12 13 /* 14 diff --git a/st.c b/st.c 15 index ebdf360..817cc47 100644 16 --- a/st.c 17 +++ b/st.c 18 @@ -35,6 +35,7 @@ 19 #define ESC_ARG_SIZ 16 20 #define STR_BUF_SIZ ESC_BUF_SIZ 21 #define STR_ARG_SIZ ESC_ARG_SIZ 22 +#define HISTSIZE 2000 23 24 /* macros */ 25 #define IS_SET(flag) ((term.mode & (flag)) != 0) 26 @@ -42,6 +43,9 @@ 27 #define ISCONTROLC1(c) (BETWEEN(c, 0x80, 0x9f)) 28 #define ISCONTROL(c) (ISCONTROLC0(c) || ISCONTROLC1(c)) 29 #define ISDELIM(u) (u && wcschr(worddelimiters, u)) 30 +#define TLINE(y) ((y) < term.scr ? term.hist[((y) + term.histi - \ 31 + term.scr + HISTSIZE + 1) % HISTSIZE] : \ 32 + term.line[(y) - term.scr]) 33 34 enum term_mode { 35 MODE_WRAP = 1 << 0, 36 @@ -115,6 +119,9 @@ typedef struct { 37 int col; /* nb col */ 38 Line *line; /* screen */ 39 Line *alt; /* alternate screen */ 40 + Line hist[HISTSIZE]; /* history buffer */ 41 + int histi; /* history index */ 42 + int scr; /* scroll back */ 43 int *dirty; /* dirtyness of lines */ 44 TCursor c; /* cursor */ 45 int ocx; /* old cursor col */ 46 @@ -184,8 +191,8 @@ static void tnewline(int); 47 static void tputtab(int); 48 static void tputc(Rune); 49 static void treset(void); 50 -static void tscrollup(int, int); 51 -static void tscrolldown(int, int); 52 +static void tscrollup(int, int, int); 53 +static void tscrolldown(int, int, int); 54 static void tsetattr(const int *, int); 55 static void tsetchar(Rune, const Glyph *, int, int); 56 static void tsetdirt(int, int); 57 @@ -416,10 +423,10 @@ tlinelen(int y) 58 { 59 int i = term.col; 60 61 - if (term.line[y][i - 1].mode & ATTR_WRAP) 62 + if (TLINE(y)[i - 1].mode & ATTR_WRAP) 63 return i; 64 65 - while (i > 0 && term.line[y][i - 1].u == ' ') 66 + while (i > 0 && TLINE(y)[i - 1].u == ' ') 67 --i; 68 69 return i; 70 @@ -528,7 +535,7 @@ selsnap(int *x, int *y, int direction) 71 * Snap around if the word wraps around at the end or 72 * beginning of a line. 73 */ 74 - prevgp = &term.line[*y][*x]; 75 + prevgp = &TLINE(*y)[*x]; 76 prevdelim = ISDELIM(prevgp->u); 77 for (;;) { 78 newx = *x + direction; 79 @@ -543,14 +550,14 @@ selsnap(int *x, int *y, int direction) 80 yt = *y, xt = *x; 81 else 82 yt = newy, xt = newx; 83 - if (!(term.line[yt][xt].mode & ATTR_WRAP)) 84 + if (!(TLINE(yt)[xt].mode & ATTR_WRAP)) 85 break; 86 } 87 88 if (newx >= tlinelen(newy)) 89 break; 90 91 - gp = &term.line[newy][newx]; 92 + gp = &TLINE(newy)[newx]; 93 delim = ISDELIM(gp->u); 94 if (!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim 95 || (delim && gp->u != prevgp->u))) 96 @@ -571,14 +578,14 @@ selsnap(int *x, int *y, int direction) 97 *x = (direction < 0) ? 0 : term.col - 1; 98 if (direction < 0) { 99 for (; *y > 0; *y += direction) { 100 - if (!(term.line[*y-1][term.col-1].mode 101 + if (!(TLINE(*y-1)[term.col-1].mode 102 & ATTR_WRAP)) { 103 break; 104 } 105 } 106 } else if (direction > 0) { 107 for (; *y < term.row-1; *y += direction) { 108 - if (!(term.line[*y][term.col-1].mode 109 + if (!(TLINE(*y)[term.col-1].mode 110 & ATTR_WRAP)) { 111 break; 112 } 113 @@ -609,13 +616,13 @@ getsel(void) 114 } 115 116 if (sel.type == SEL_RECTANGULAR) { 117 - gp = &term.line[y][sel.nb.x]; 118 + gp = &TLINE(y)[sel.nb.x]; 119 lastx = sel.ne.x; 120 } else { 121 - gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0]; 122 + gp = &TLINE(y)[sel.nb.y == y ? sel.nb.x : 0]; 123 lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1; 124 } 125 - last = &term.line[y][MIN(lastx, linelen-1)]; 126 + last = &TLINE(y)[MIN(lastx, linelen-1)]; 127 while (last >= gp && last->u == ' ') 128 --last; 129 130 @@ -850,6 +857,9 @@ void 131 ttywrite(const char *s, size_t n, int may_echo) 132 { 133 const char *next; 134 + Arg arg = (Arg) { .i = term.scr }; 135 + 136 + kscrolldown(&arg); 137 138 if (may_echo && IS_SET(MODE_ECHO)) 139 twrite(s, n, 1); 140 @@ -1061,13 +1071,53 @@ tswapscreen(void) 141 } 142 143 void 144 -tscrolldown(int orig, int n) 145 +kscrolldown(const Arg* a) 146 +{ 147 + int n = a->i; 148 + 149 + if (n < 0) 150 + n = term.row + n; 151 + 152 + if (n > term.scr) 153 + n = term.scr; 154 + 155 + if (term.scr > 0) { 156 + term.scr -= n; 157 + selscroll(0, -n); 158 + tfulldirt(); 159 + } 160 +} 161 + 162 +void 163 +kscrollup(const Arg* a) 164 +{ 165 + int n = a->i; 166 + 167 + if (n < 0) 168 + n = term.row + n; 169 + 170 + if (term.scr <= HISTSIZE-n) { 171 + term.scr += n; 172 + selscroll(0, n); 173 + tfulldirt(); 174 + } 175 +} 176 + 177 +void 178 +tscrolldown(int orig, int n, int copyhist) 179 { 180 int i; 181 Line temp; 182 183 LIMIT(n, 0, term.bot-orig+1); 184 185 + if (copyhist) { 186 + term.histi = (term.histi - 1 + HISTSIZE) % HISTSIZE; 187 + temp = term.hist[term.histi]; 188 + term.hist[term.histi] = term.line[term.bot]; 189 + term.line[term.bot] = temp; 190 + } 191 + 192 tsetdirt(orig, term.bot-n); 193 tclearregion(0, term.bot-n+1, term.col-1, term.bot); 194 195 @@ -1077,17 +1127,28 @@ tscrolldown(int orig, int n) 196 term.line[i-n] = temp; 197 } 198 199 - selscroll(orig, n); 200 + if (term.scr == 0) 201 + selscroll(orig, n); 202 } 203 204 void 205 -tscrollup(int orig, int n) 206 +tscrollup(int orig, int n, int copyhist) 207 { 208 int i; 209 Line temp; 210 211 LIMIT(n, 0, term.bot-orig+1); 212 213 + if (copyhist) { 214 + term.histi = (term.histi + 1) % HISTSIZE; 215 + temp = term.hist[term.histi]; 216 + term.hist[term.histi] = term.line[orig]; 217 + term.line[orig] = temp; 218 + } 219 + 220 + if (term.scr > 0 && term.scr < HISTSIZE) 221 + term.scr = MIN(term.scr + n, HISTSIZE-1); 222 + 223 tclearregion(0, orig, term.col-1, orig+n-1); 224 tsetdirt(orig+n, term.bot); 225 226 @@ -1097,7 +1158,8 @@ tscrollup(int orig, int n) 227 term.line[i+n] = temp; 228 } 229 230 - selscroll(orig, -n); 231 + if (term.scr == 0) 232 + selscroll(orig, -n); 233 } 234 235 void 236 @@ -1126,7 +1188,7 @@ tnewline(int first_col) 237 int y = term.c.y; 238 239 if (y == term.bot) { 240 - tscrollup(term.top, 1); 241 + tscrollup(term.top, 1, 1); 242 } else { 243 y++; 244 } 245 @@ -1291,14 +1353,14 @@ void 246 tinsertblankline(int n) 247 { 248 if (BETWEEN(term.c.y, term.top, term.bot)) 249 - tscrolldown(term.c.y, n); 250 + tscrolldown(term.c.y, n, 0); 251 } 252 253 void 254 tdeleteline(int n) 255 { 256 if (BETWEEN(term.c.y, term.top, term.bot)) 257 - tscrollup(term.c.y, n); 258 + tscrollup(term.c.y, n, 0); 259 } 260 261 int32_t 262 @@ -1735,11 +1797,11 @@ csihandle(void) 263 break; 264 case 'S': /* SU -- Scroll <n> line up */ 265 DEFAULT(csiescseq.arg[0], 1); 266 - tscrollup(term.top, csiescseq.arg[0]); 267 + tscrollup(term.top, csiescseq.arg[0], 0); 268 break; 269 case 'T': /* SD -- Scroll <n> line down */ 270 DEFAULT(csiescseq.arg[0], 1); 271 - tscrolldown(term.top, csiescseq.arg[0]); 272 + tscrolldown(term.top, csiescseq.arg[0], 0); 273 break; 274 case 'L': /* IL -- Insert <n> blank lines */ 275 DEFAULT(csiescseq.arg[0], 1); 276 @@ -2251,7 +2313,7 @@ eschandle(uchar ascii) 277 return 0; 278 case 'D': /* IND -- Linefeed */ 279 if (term.c.y == term.bot) { 280 - tscrollup(term.top, 1); 281 + tscrollup(term.top, 1, 1); 282 } else { 283 tmoveto(term.c.x, term.c.y+1); 284 } 285 @@ -2264,7 +2326,7 @@ eschandle(uchar ascii) 286 break; 287 case 'M': /* RI -- Reverse index */ 288 if (term.c.y == term.top) { 289 - tscrolldown(term.top, 1); 290 + tscrolldown(term.top, 1, 1); 291 } else { 292 tmoveto(term.c.x, term.c.y-1); 293 } 294 @@ -2474,7 +2536,7 @@ twrite(const char *buf, int buflen, int show_ctrl) 295 void 296 tresize(int col, int row) 297 { 298 - int i; 299 + int i, j; 300 int minrow = MIN(row, term.row); 301 int mincol = MIN(col, term.col); 302 int *bp; 303 @@ -2511,6 +2573,14 @@ tresize(int col, int row) 304 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty)); 305 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs)); 306 307 + for (i = 0; i < HISTSIZE; i++) { 308 + term.hist[i] = xrealloc(term.hist[i], col * sizeof(Glyph)); 309 + for (j = mincol; j < col; j++) { 310 + term.hist[i][j] = term.c.attr; 311 + term.hist[i][j].u = ' '; 312 + } 313 + } 314 + 315 /* resize each row to new width, zero-pad if needed */ 316 for (i = 0; i < minrow; i++) { 317 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph)); 318 @@ -2569,7 +2639,7 @@ drawregion(int x1, int y1, int x2, int y2) 319 continue; 320 321 term.dirty[y] = 0; 322 - xdrawline(term.line[y], x1, y, x2); 323 + xdrawline(TLINE(y), x1, y, x2); 324 } 325 } 326 327 @@ -2590,8 +2660,9 @@ draw(void) 328 cx--; 329 330 drawregion(0, 0, term.col, term.row); 331 - xdrawcursor(cx, term.c.y, term.line[term.c.y][cx], 332 - term.ocx, term.ocy, term.line[term.ocy][term.ocx]); 333 + if (term.scr == 0) 334 + xdrawcursor(cx, term.c.y, term.line[term.c.y][cx], 335 + term.ocx, term.ocy, term.line[term.ocy][term.ocx]); 336 term.ocx = cx; 337 term.ocy = term.c.y; 338 xfinishdraw(); 339 diff --git a/st.h b/st.h 340 index fa2eddf..adda2db 100644 341 --- a/st.h 342 +++ b/st.h 343 @@ -81,6 +81,8 @@ void die(const char *, ...); 344 void redraw(void); 345 void draw(void); 346 347 +void kscrolldown(const Arg *); 348 +void kscrollup(const Arg *); 349 void printscreen(const Arg *); 350 void printsel(const Arg *); 351 void sendbreak(const Arg *);