cmd-capture-pane.c

   1 /* $OpenBSD$ */
   2
   3 /*
   4  * Copyright (c) 2009 Jonathan Alvarado <radobobo@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 <stdlib.h>
  22 #include <string.h>
  23
  24 #include "tmux.h"
  25
  26 /*
  27  * Write the entire contents of a pane to a buffer or stdout.
  28  */
  29
  30 static enum cmd_retval  cmd_capture_pane_exec(struct cmd *, struct cmdq_item *);
  31
  32 static char     *cmd_capture_pane_append(char *, size_t *, char *, size_t);
  33 static char     *cmd_capture_pane_pending(struct args *, struct window_pane *,
  34                      size_t *);
  35 static char     *cmd_capture_pane_history(struct args *, struct cmdq_item *,
  36                      struct window_pane *, size_t *);
  37
  38 const struct cmd_entry cmd_capture_pane_entry = {
  39         .name = "capture-pane",
  40         .alias = "capturep",
  41
  42         .args = { "ab:CeE:JNpPqS:t:", 0, 0, NULL },
  43         .usage = "[-aCeJNpPq] " CMD_BUFFER_USAGE " [-E end-line] "
  44                  "[-S start-line] " CMD_TARGET_PANE_USAGE,
  45
  46         .target = { 't', CMD_FIND_PANE, 0 },
  47
  48         .flags = CMD_AFTERHOOK,
  49         .exec = cmd_capture_pane_exec
  50 };
  51
  52 const struct cmd_entry cmd_clear_history_entry = {
  53         .name = "clear-history",
  54         .alias = "clearhist",
  55
  56         .args = { "t:", 0, 0, NULL },
  57         .usage = CMD_TARGET_PANE_USAGE,
  58
  59         .target = { 't', CMD_FIND_PANE, 0 },
  60
  61         .flags = CMD_AFTERHOOK,
  62         .exec = cmd_capture_pane_exec
  63 };
  64
  65 static char *
  66 cmd_capture_pane_append(char *buf, size_t *len, char *line, size_t linelen)
  67 {
  68         buf = xrealloc(buf, *len + linelen + 1);
  69         memcpy(buf + *len, line, linelen);
  70         *len += linelen;
  71         return (buf);
  72 }
  73
  74 static char *
  75 cmd_capture_pane_pending(struct args *args, struct window_pane *wp,
  76     size_t *len)
  77 {
  78         struct evbuffer *pending;
  79         char            *buf, *line, tmp[5];
  80         size_t           linelen;
  81         u_int            i;
  82
  83         pending = input_pending(wp->ictx);
  84         if (pending == NULL)
  85                 return (xstrdup(""));
  86
  87         line = EVBUFFER_DATA(pending);
  88         linelen = EVBUFFER_LENGTH(pending);
  89
  90         buf = xstrdup("");
  91         if (args_has(args, 'C')) {
  92                 for (i = 0; i < linelen; i++) {
  93                         if (line[i] >= ' ' && line[i] != '\\') {
  94                                 tmp[0] = line[i];
  95                                 tmp[1] = '\0';
  96                         } else
  97                                 xsnprintf(tmp, sizeof tmp, "\\%03hho", line[i]);
  98                         buf = cmd_capture_pane_append(buf, len, tmp,
  99                             strlen(tmp));
 100                 }
 101         } else
 102                 buf = cmd_capture_pane_append(buf, len, line, linelen);
 103         return (buf);
 104 }
 105
 106 static char *
 107 cmd_capture_pane_history(struct args *args, struct cmdq_item *item,
 108     struct window_pane *wp, size_t *len)
 109 {
 110         struct grid             *gd;
 111         const struct grid_line  *gl;
 112         struct grid_cell        *gc = NULL;
 113         int                      n, with_codes, escape_c0, join_lines, no_trim;
 114         u_int                    i, sx, top, bottom, tmp;
 115         char                    *cause, *buf, *line;
 116         const char              *Sflag, *Eflag;
 117         size_t                   linelen;
 118
 119         sx = screen_size_x(&wp->base);
 120         if (args_has(args, 'a')) {
 121                 gd = wp->base.saved_grid;
 122                 if (gd == NULL) {
 123                         if (!args_has(args, 'q')) {
 124                                 cmdq_error(item, "no alternate screen");
 125                                 return (NULL);
 126                         }
 127                         return (xstrdup(""));
 128                 }
 129         } else
 130                 gd = wp->base.grid;
 131
 132         Sflag = args_get(args, 'S');
 133         if (Sflag != NULL && strcmp(Sflag, "-") == 0)
 134                 top = 0;
 135         else {
 136                 n = args_strtonum_and_expand(args, 'S', INT_MIN, SHRT_MAX,
 137                         item, &cause);
 138                 if (cause != NULL) {
 139                         top = gd->hsize;
 140                         free(cause);
 141                 } else if (n < 0 && (u_int) -n > gd->hsize)
 142                         top = 0;
 143                 else
 144                         top = gd->hsize + n;
 145                 if (top > gd->hsize + gd->sy - 1)
 146                         top = gd->hsize + gd->sy - 1;
 147         }
 148
 149         Eflag = args_get(args, 'E');
 150         if (Eflag != NULL && strcmp(Eflag, "-") == 0)
 151                 bottom = gd->hsize + gd->sy - 1;
 152         else {
 153                 n = args_strtonum_and_expand(args, 'E', INT_MIN, SHRT_MAX,
 154                         item, &cause);
 155                 if (cause != NULL) {
 156                         bottom = gd->hsize + gd->sy - 1;
 157                         free(cause);
 158                 } else if (n < 0 && (u_int) -n > gd->hsize)
 159                         bottom = 0;
 160                 else
 161                         bottom = gd->hsize + n;
 162                 if (bottom > gd->hsize + gd->sy - 1)
 163                         bottom = gd->hsize + gd->sy - 1;
 164         }
 165
 166         if (bottom < top) {
 167                 tmp = bottom;
 168                 bottom = top;
 169                 top = tmp;
 170         }
 171
 172         with_codes = args_has(args, 'e');
 173         escape_c0 = args_has(args, 'C');
 174         join_lines = args_has(args, 'J');
 175         no_trim = args_has(args, 'N');
 176
 177         buf = NULL;
 178         for (i = top; i <= bottom; i++) {
 179                 line = grid_string_cells(gd, 0, i, sx, &gc, with_codes,
 180                     escape_c0, !join_lines && !no_trim);
 181                 linelen = strlen(line);
 182
 183                 buf = cmd_capture_pane_append(buf, len, line, linelen);
 184
 185                 gl = grid_peek_line(gd, i);
 186                 if (!join_lines || !(gl->flags & GRID_LINE_WRAPPED))
 187                         buf[(*len)++] = '\n';
 188
 189                 free(line);
 190         }
 191         return (buf);
 192 }
 193
 194 static enum cmd_retval
 195 cmd_capture_pane_exec(struct cmd *self, struct cmdq_item *item)
 196 {
 197         struct args             *args = cmd_get_args(self);
 198         struct client           *c = cmdq_get_client(item);
 199         struct window_pane      *wp = cmdq_get_target(item)->wp;
 200         char                    *buf, *cause;
 201         const char              *bufname;
 202         size_t                   len;
 203
 204         if (cmd_get_entry(self) == &cmd_clear_history_entry) {
 205                 window_pane_reset_mode_all(wp);
 206                 grid_clear_history(wp->base.grid);
 207                 return (CMD_RETURN_NORMAL);
 208         }
 209
 210         len = 0;
 211         if (args_has(args, 'P'))
 212                 buf = cmd_capture_pane_pending(args, wp, &len);
 213         else
 214                 buf = cmd_capture_pane_history(args, item, wp, &len);
 215         if (buf == NULL)
 216                 return (CMD_RETURN_ERROR);
 217
 218         if (args_has(args, 'p')) {
 219                 if (len > 0 && buf[len - 1] == '\n')
 220                         len--;
 221                 if (c->flags & CLIENT_CONTROL)
 222                         control_write(c, "%.*s", (int)len, buf);
 223                 else {
 224                         if (!file_can_print(c)) {
 225                                 cmdq_error(item, "can't write to client");
 226                                 free(buf);
 227                                 return (CMD_RETURN_ERROR);
 228                         }
 229                         file_print_buffer(c, buf, len);
 230                         file_print(c, "\n");
 231                         free(buf);
 232                 }
 233         } else {
 234                 bufname = NULL;
 235                 if (args_has(args, 'b'))
 236                         bufname = args_get(args, 'b');
 237
 238                 if (paste_set(buf, len, bufname, &cause) != 0) {
 239                         cmdq_error(item, "%s", cause);
 240                         free(cause);
 241                         free(buf);
 242                         return (CMD_RETURN_ERROR);
 243                 }
 244         }
 245
 246         return (CMD_RETURN_NORMAL);
 247 }