/* $OpenBSD: screen-write.c,v 1.68 2014/01/28 23:07:09 nicm Exp $ */ /* * Copyright (c) 2007 Nicholas Marriott * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include #include #include #include "tmux.h" void screen_write_initctx(struct screen_write_ctx *, struct tty_ctx *, int); void screen_write_overwrite(struct screen_write_ctx *, u_int); int screen_write_combine( struct screen_write_ctx *, const struct utf8_data *); /* Initialise writing with a window. */ void screen_write_start( struct screen_write_ctx *ctx, struct window_pane *wp, struct screen *s) { ctx->wp = wp; if (wp != NULL && s == NULL) ctx->s = wp->screen; else ctx->s = s; } /* Finish writing. */ void screen_write_stop(unused struct screen_write_ctx *ctx) { } /* Reset screen state. */ void screen_write_reset(struct screen_write_ctx *ctx) { struct screen *s = ctx->s; screen_reset_tabs(s); screen_write_scrollregion(ctx, 0, screen_size_y(s) - 1); s->mode &= ~(MODE_INSERT|MODE_KCURSOR|MODE_KKEYPAD|MODE_FOCUSON); s->mode &= ~(ALL_MOUSE_MODES|MODE_MOUSE_UTF8|MODE_MOUSE_SGR); screen_write_clearscreen(ctx); screen_write_cursormove(ctx, 0, 0); } /* Write character. */ void screen_write_putc(struct screen_write_ctx *ctx, struct grid_cell *gc, u_char ch) { grid_cell_one(gc, ch); screen_write_cell(ctx, gc); } /* Calculate string length, with embedded formatting. */ size_t printflike2 screen_write_cstrlen(int utf8flag, const char *fmt, ...) { va_list ap; char *msg, *msg2, *ptr, *ptr2; size_t size; va_start(ap, fmt); xvasprintf(&msg, fmt, ap); va_end(ap); msg2 = xmalloc(strlen(msg) + 1); ptr = msg; ptr2 = msg2; while (*ptr != '\0') { if (ptr[0] == '#' && ptr[1] == '[') { while (*ptr != ']' && *ptr != '\0') ptr++; if (*ptr == ']') ptr++; continue; } *ptr2++ = *ptr++; } *ptr2 = '\0'; size = screen_write_strlen(utf8flag, "%s", msg2); free(msg); free(msg2); return (size); } /* Calculate string length. */ size_t printflike2 screen_write_strlen(int utf8flag, const char *fmt, ...) { va_list ap; char *msg; struct utf8_data utf8data; u_char *ptr; size_t left, size = 0; va_start(ap, fmt); xvasprintf(&msg, fmt, ap); va_end(ap); ptr = msg; while (*ptr != '\0') { if (utf8flag && *ptr > 0x7f && utf8_open(&utf8data, *ptr)) { ptr++; left = strlen(ptr); if (left < utf8data.size - 1) break; while (utf8_append(&utf8data, *ptr)) ptr++; ptr++; size += utf8data.width; } else { size++; ptr++; } } free(msg); return (size); } /* Write simple string (no UTF-8 or maximum length). */ void printflike3 screen_write_puts( struct screen_write_ctx *ctx, struct grid_cell *gc, const char *fmt, ...) { va_list ap; va_start(ap, fmt); screen_write_vnputs(ctx, -1, gc, 0, fmt, ap); va_end(ap); } /* Write string with length limit (-1 for unlimited). */ void printflike5 screen_write_nputs(struct screen_write_ctx *ctx, ssize_t maxlen, struct grid_cell *gc, int utf8flag, const char *fmt, ...) { va_list ap; va_start(ap, fmt); screen_write_vnputs(ctx, maxlen, gc, utf8flag, fmt, ap); va_end(ap); } void screen_write_vnputs(struct screen_write_ctx *ctx, ssize_t maxlen, struct grid_cell *gc, int utf8flag, const char *fmt, va_list ap) { char *msg; struct utf8_data utf8data; u_char *ptr; size_t left, size = 0; xvasprintf(&msg, fmt, ap); ptr = msg; while (*ptr != '\0') { if (utf8flag && *ptr > 0x7f && utf8_open(&utf8data, *ptr)) { ptr++; left = strlen(ptr); if (left < utf8data.size - 1) break; while (utf8_append(&utf8data, *ptr)) ptr++; ptr++; if (maxlen > 0 && size + utf8data.width > (size_t) maxlen) { while (size < (size_t) maxlen) { screen_write_putc(ctx, gc, ' '); size++; } break; } size += utf8data.width; grid_cell_set(gc, &utf8data); screen_write_cell(ctx, gc); } else { if (maxlen > 0 && size + 1 > (size_t) maxlen) break; if (*ptr == '\001') gc->attr ^= GRID_ATTR_CHARSET; else { size++; screen_write_putc(ctx, gc, *ptr); } ptr++; } } free(msg); } /* Write string, similar to nputs, but with embedded formatting (#[]). */ void printflike5 screen_write_cnputs(struct screen_write_ctx *ctx, ssize_t maxlen, struct grid_cell *gc, int utf8flag, const char *fmt, ...) { struct grid_cell lgc; struct utf8_data utf8data; va_list ap; char *msg; u_char *ptr, *last; size_t left, size = 0; va_start(ap, fmt); xvasprintf(&msg, fmt, ap); va_end(ap); memcpy(&lgc, gc, sizeof lgc); ptr = msg; while (*ptr != '\0') { if (ptr[0] == '#' && ptr[1] == '[') { ptr += 2; last = ptr + strcspn(ptr, "]"); if (*last == '\0') { /* No ]. Not much point in doing anything. */ break; } *last = '\0'; style_parse(gc, &lgc, ptr); ptr = last + 1; continue; } if (utf8flag && *ptr > 0x7f && utf8_open(&utf8data, *ptr)) { ptr++; left = strlen(ptr); if (left < utf8data.size - 1) break; while (utf8_append(&utf8data, *ptr)) ptr++; ptr++; if (maxlen > 0 && size + utf8data.width > (size_t) maxlen) { while (size < (size_t) maxlen) { screen_write_putc(ctx, gc, ' '); size++; } break; } size += utf8data.width; grid_cell_set(&lgc, &utf8data); screen_write_cell(ctx, &lgc); } else { if (maxlen > 0 && size + 1 > (size_t) maxlen) break; size++; screen_write_putc(ctx, &lgc, *ptr); ptr++; } } free(msg); } /* Copy from another screen. */ void screen_write_copy(struct screen_write_ctx *ctx, struct screen *src, u_int px, u_int py, u_int nx, u_int ny) { struct screen *s = ctx->s; struct grid *gd = src->grid; struct grid_line *gl; const struct grid_cell *gc; struct utf8_data ud; u_int xx, yy, cx, cy, ax, bx; cx = s->cx; cy = s->cy; for (yy = py; yy < py + ny; yy++) { gl = &gd->linedata[yy]; if (yy < gd->hsize + gd->sy) { /* * Find start and end position and copy between * them. Limit to the real end of the line then use a * clear EOL only if copying to the end, otherwise * could overwrite whatever is there already. */ if (px > gl->cellsize) ax = gl->cellsize; else ax = px; if (px + nx == gd->sx && px + nx > gl->cellsize) bx = gl->cellsize; else bx = px + nx; for (xx = ax; xx < bx; xx++) { if (xx >= gl->cellsize) gc = &grid_default_cell; else gc = &gl->celldata[xx]; grid_cell_get(gc, &ud); screen_write_cell(ctx, gc); } if (px + nx == gd->sx && px + nx > gl->cellsize) screen_write_clearendofline(ctx); } else screen_write_clearline(ctx); cy++; screen_write_cursormove(ctx, cx, cy); } } /* Set up context for TTY command. */ void screen_write_initctx( struct screen_write_ctx *ctx, struct tty_ctx *ttyctx, int save_last) { struct screen *s = ctx->s; struct grid *gd = s->grid; const struct grid_cell *gc; u_int xx; ttyctx->wp = ctx->wp; ttyctx->ocx = s->cx; ttyctx->ocy = s->cy; ttyctx->orlower = s->rlower; ttyctx->orupper = s->rupper; if (!save_last) return; /* Save the last cell on the screen. */ gc = &grid_default_cell; for (xx = 1; xx <= screen_size_x(s); xx++) { gc = grid_view_peek_cell(gd, screen_size_x(s) - xx, s->cy); if (!(gc->flags & GRID_FLAG_PADDING)) break; } ttyctx->last_width = xx; memcpy(&ttyctx->last_cell, gc, sizeof ttyctx->last_cell); } /* Set a mode. */ void screen_write_mode_set(struct screen_write_ctx *ctx, int mode) { struct screen *s = ctx->s; s->mode |= mode; } /* Clear a mode. */ void screen_write_mode_clear(struct screen_write_ctx *ctx, int mode) { struct screen *s = ctx->s; s->mode &= ~mode; } /* Cursor up by ny. */ void screen_write_cursorup(struct screen_write_ctx *ctx, u_int ny) { struct screen *s = ctx->s; if (ny == 0) ny = 1; if (s->cy < s->rupper) { /* Above region. */ if (ny > s->cy) ny = s->cy; } else { /* Below region. */ if (ny > s->cy - s->rupper) ny = s->cy - s->rupper; } if (s->cx == screen_size_x(s)) s->cx--; if (ny == 0) return; s->cy -= ny; } /* Cursor down by ny. */ void screen_write_cursordown(struct screen_write_ctx *ctx, u_int ny) { struct screen *s = ctx->s; if (ny == 0) ny = 1; if (s->cy > s->rlower) { /* Below region. */ if (ny > screen_size_y(s) - 1 - s->cy) ny = screen_size_y(s) - 1 - s->cy; } else { /* Above region. */ if (ny > s->rlower - s->cy) ny = s->rlower - s->cy; } if (s->cx == screen_size_x(s)) s->cx--; if (ny == 0) return; s->cy += ny; } /* Cursor right by nx. */ void screen_write_cursorright(struct screen_write_ctx *ctx, u_int nx) { struct screen *s = ctx->s; if (nx == 0) nx = 1; if (nx > screen_size_x(s) - 1 - s->cx) nx = screen_size_x(s) - 1 - s->cx; if (nx == 0) return; s->cx += nx; } /* Cursor left by nx. */ void screen_write_cursorleft(struct screen_write_ctx *ctx, u_int nx) { struct screen *s = ctx->s; if (nx == 0) nx = 1; if (nx > s->cx) nx = s->cx; if (nx == 0) return; s->cx -= nx; } /* Backspace; cursor left unless at start of wrapped line when can move up. */ void screen_write_backspace(struct screen_write_ctx *ctx) { struct screen *s = ctx->s; struct grid_line *gl; if (s->cx == 0) { if (s->cy == 0) return; gl = &s->grid->linedata[s->grid->hsize + s->cy - 1]; if (gl->flags & GRID_LINE_WRAPPED) { s->cy--; s->cx = screen_size_x(s) - 1; } } else s->cx--; } /* VT100 alignment test. */ void screen_write_alignmenttest(struct screen_write_ctx *ctx) { struct screen *s = ctx->s; struct tty_ctx ttyctx; struct grid_cell gc; u_int xx, yy; screen_write_initctx(ctx, &ttyctx, 0); memcpy(&gc, &grid_default_cell, sizeof gc); grid_cell_one(&gc, 'E'); for (yy = 0; yy < screen_size_y(s); yy++) { for (xx = 0; xx < screen_size_x(s); xx++) grid_view_set_cell(s->grid, xx, yy, &gc); } s->cx = 0; s->cy = 0; s->rupper = 0; s->rlower = screen_size_y(s) - 1; tty_write(tty_cmd_alignmenttest, &ttyctx); } /* Insert nx characters. */ void screen_write_insertcharacter(struct screen_write_ctx *ctx, u_int nx) { struct screen *s = ctx->s; struct tty_ctx ttyctx; if (nx == 0) nx = 1; if (nx > screen_size_x(s) - s->cx) nx = screen_size_x(s) - s->cx; if (nx == 0) return; screen_write_initctx(ctx, &ttyctx, 0); if (s->cx <= screen_size_x(s) - 1) grid_view_insert_cells(s->grid, s->cx, s->cy, nx); ttyctx.num = nx; tty_write(tty_cmd_insertcharacter, &ttyctx); } /* Delete nx characters. */ void screen_write_deletecharacter(struct screen_write_ctx *ctx, u_int nx) { struct screen *s = ctx->s; struct tty_ctx ttyctx; if (nx == 0) nx = 1; if (nx > screen_size_x(s) - s->cx) nx = screen_size_x(s) - s->cx; if (nx == 0) return; screen_write_initctx(ctx, &ttyctx, 0); if (s->cx <= screen_size_x(s) - 1) grid_view_delete_cells(s->grid, s->cx, s->cy, nx); ttyctx.num = nx; tty_write(tty_cmd_deletecharacter, &ttyctx); } /* Clear nx characters. */ void screen_write_clearcharacter(struct screen_write_ctx *ctx, u_int nx) { struct screen *s = ctx->s; struct tty_ctx ttyctx; if (nx == 0) nx = 1; if (nx > screen_size_x(s) - s->cx) nx = screen_size_x(s) - s->cx; if (nx == 0) return; screen_write_initctx(ctx, &ttyctx, 0); if (s->cx <= screen_size_x(s) - 1) grid_view_clear(s->grid, s->cx, s->cy, nx, 1); ttyctx.num = nx; tty_write(tty_cmd_clearcharacter, &ttyctx); } /* Insert ny lines. */ void screen_write_insertline(struct screen_write_ctx *ctx, u_int ny) { struct screen *s = ctx->s; struct tty_ctx ttyctx; if (ny == 0) ny = 1; if (s->cy < s->rupper || s->cy > s->rlower) { if (ny > screen_size_y(s) - s->cy) ny = screen_size_y(s) - s->cy; if (ny == 0) return; screen_write_initctx(ctx, &ttyctx, 0); grid_view_insert_lines(s->grid, s->cy, ny); ttyctx.num = ny; tty_write(tty_cmd_insertline, &ttyctx); return; } if (ny > s->rlower + 1 - s->cy) ny = s->rlower + 1 - s->cy; if (ny == 0) return; screen_write_initctx(ctx, &ttyctx, 0); if (s->cy < s->rupper || s->cy > s->rlower) grid_view_insert_lines(s->grid, s->cy, ny); else grid_view_insert_lines_region(s->grid, s->rlower, s->cy, ny); ttyctx.num = ny; tty_write(tty_cmd_insertline, &ttyctx); } /* Delete ny lines. */ void screen_write_deleteline(struct screen_write_ctx *ctx, u_int ny) { struct screen *s = ctx->s; struct tty_ctx ttyctx; if (ny == 0) ny = 1; if (s->cy < s->rupper || s->cy > s->rlower) { if (ny > screen_size_y(s) - s->cy) ny = screen_size_y(s) - s->cy; if (ny == 0) return; screen_write_initctx(ctx, &ttyctx, 0); grid_view_delete_lines(s->grid, s->cy, ny); ttyctx.num = ny; tty_write(tty_cmd_deleteline, &ttyctx); return; } if (ny > s->rlower + 1 - s->cy) ny = s->rlower + 1 - s->cy; if (ny == 0) return; screen_write_initctx(ctx, &ttyctx, 0); if (s->cy < s->rupper || s->cy > s->rlower) grid_view_delete_lines(s->grid, s->cy, ny); else grid_view_delete_lines_region(s->grid, s->rlower, s->cy, ny); ttyctx.num = ny; tty_write(tty_cmd_deleteline, &ttyctx); } /* Clear line at cursor. */ void screen_write_clearline(struct screen_write_ctx *ctx) { struct screen *s = ctx->s; struct tty_ctx ttyctx; screen_write_initctx(ctx, &ttyctx, 0); grid_view_clear(s->grid, 0, s->cy, screen_size_x(s), 1); tty_write(tty_cmd_clearline, &ttyctx); } /* Clear to end of line from cursor. */ void screen_write_clearendofline(struct screen_write_ctx *ctx) { struct screen *s = ctx->s; struct tty_ctx ttyctx; u_int sx; screen_write_initctx(ctx, &ttyctx, 0); sx = screen_size_x(s); if (s->cx <= sx - 1) grid_view_clear(s->grid, s->cx, s->cy, sx - s->cx, 1); tty_write(tty_cmd_clearendofline, &ttyctx); } /* Clear to start of line from cursor. */ void screen_write_clearstartofline(struct screen_write_ctx *ctx) { struct screen *s = ctx->s; struct tty_ctx ttyctx; u_int sx; screen_write_initctx(ctx, &ttyctx, 0); sx = screen_size_x(s); if (s->cx > sx - 1) grid_view_clear(s->grid, 0, s->cy, sx, 1); else grid_view_clear(s->grid, 0, s->cy, s->cx + 1, 1); tty_write(tty_cmd_clearstartofline, &ttyctx); } /* Move cursor to px,py. */ void screen_write_cursormove(struct screen_write_ctx *ctx, u_int px, u_int py) { struct screen *s = ctx->s; if (px > screen_size_x(s) - 1) px = screen_size_x(s) - 1; if (py > screen_size_y(s) - 1) py = screen_size_y(s) - 1; s->cx = px; s->cy = py; } /* Reverse index (up with scroll). */ void screen_write_reverseindex(struct screen_write_ctx *ctx) { struct screen *s = ctx->s; struct tty_ctx ttyctx; screen_write_initctx(ctx, &ttyctx, 0); if (s->cy == s->rupper) grid_view_scroll_region_down(s->grid, s->rupper, s->rlower); else if (s->cy > 0) s->cy--; tty_write(tty_cmd_reverseindex, &ttyctx); } /* Set scroll region. */ void screen_write_scrollregion( struct screen_write_ctx *ctx, u_int rupper, u_int rlower) { struct screen *s = ctx->s; if (rupper > screen_size_y(s) - 1) rupper = screen_size_y(s) - 1; if (rlower > screen_size_y(s) - 1) rlower = screen_size_y(s) - 1; if (rupper >= rlower) /* cannot be one line */ return; /* Cursor moves to top-left. */ s->cx = 0; s->cy = 0; s->rupper = rupper; s->rlower = rlower; } /* Line feed. */ void screen_write_linefeed(struct screen_write_ctx *ctx, int wrapped) { struct screen *s = ctx->s; struct grid_line *gl; struct tty_ctx ttyctx; screen_write_initctx(ctx, &ttyctx, 0); gl = &s->grid->linedata[s->grid->hsize + s->cy]; if (wrapped) gl->flags |= GRID_LINE_WRAPPED; else gl->flags &= ~GRID_LINE_WRAPPED; if (s->cy == s->rlower) grid_view_scroll_region_up(s->grid, s->rupper, s->rlower); else if (s->cy < screen_size_y(s) - 1) s->cy++; ttyctx.num = wrapped; tty_write(tty_cmd_linefeed, &ttyctx); } /* Carriage return (cursor to start of line). */ void screen_write_carriagereturn(struct screen_write_ctx *ctx) { struct screen *s = ctx->s; s->cx = 0; } /* Clear to end of screen from cursor. */ void screen_write_clearendofscreen(struct screen_write_ctx *ctx) { struct screen *s = ctx->s; struct tty_ctx ttyctx; u_int sx, sy; screen_write_initctx(ctx, &ttyctx, 0); sx = screen_size_x(s); sy = screen_size_y(s); /* Scroll into history if it is enabled and clearing entire screen. */ if (s->cy == 0 && s->grid->flags & GRID_HISTORY) grid_view_clear_history(s->grid); else { if (s->cx <= sx - 1) grid_view_clear(s->grid, s->cx, s->cy, sx - s->cx, 1); grid_view_clear(s->grid, 0, s->cy + 1, sx, sy - (s->cy + 1)); } tty_write(tty_cmd_clearendofscreen, &ttyctx); } /* Clear to start of screen. */ void screen_write_clearstartofscreen(struct screen_write_ctx *ctx) { struct screen *s = ctx->s; struct tty_ctx ttyctx; u_int sx; screen_write_initctx(ctx, &ttyctx, 0); sx = screen_size_x(s); if (s->cy > 0) grid_view_clear(s->grid, 0, 0, sx, s->cy); if (s->cx > sx - 1) grid_view_clear(s->grid, 0, s->cy, sx, 1); else grid_view_clear(s->grid, 0, s->cy, s->cx + 1, 1); tty_write(tty_cmd_clearstartofscreen, &ttyctx); } /* Clear entire screen. */ void screen_write_clearscreen(struct screen_write_ctx *ctx) { struct screen *s = ctx->s; struct tty_ctx ttyctx; screen_write_initctx(ctx, &ttyctx, 0); /* Scroll into history if it is enabled. */ if (s->grid->flags & GRID_HISTORY) grid_view_clear_history(s->grid); else { grid_view_clear( s->grid, 0, 0, screen_size_x(s), screen_size_y(s)); } tty_write(tty_cmd_clearscreen, &ttyctx); } /* Clear entire history. */ void screen_write_clearhistory(struct screen_write_ctx *ctx) { struct screen *s = ctx->s; struct grid *gd = s->grid; grid_move_lines(gd, 0, gd->hsize, gd->sy); gd->hsize = 0; } /* Write cell data. */ void screen_write_cell(struct screen_write_ctx *ctx, const struct grid_cell *gc) { struct screen *s = ctx->s; struct grid *gd = s->grid; struct tty_ctx ttyctx; u_int width, xx, last; struct grid_cell tmp_gc, *tmp_gcp; struct utf8_data ud; int insert; /* Ignore padding. */ if (gc->flags & GRID_FLAG_PADDING) return; width = grid_cell_width(gc); /* * If this is a wide character and there is no room on the screen, for * the entire character, don't print it. */ if (!(s->mode & MODE_WRAP) && (width > 1 && (width > screen_size_x(s) || (s->cx != screen_size_x(s) && s->cx > screen_size_x(s) - width)))) return; /* * If the width is zero, combine onto the previous character, if * there is space. */ if (width == 0) { grid_cell_get(gc, &ud); if (screen_write_combine(ctx, &ud) == 0) { screen_write_initctx(ctx, &ttyctx, 0); tty_write(tty_cmd_utf8character, &ttyctx); } return; } /* Initialise the redraw context, saving the last cell. */ screen_write_initctx(ctx, &ttyctx, 1); /* If in insert mode, make space for the cells. */ if ((s->mode & MODE_INSERT) && s->cx <= screen_size_x(s) - width) { xx = screen_size_x(s) - s->cx - width; grid_move_cells(s->grid, s->cx + width, s->cx, s->cy, xx); insert = 1; } else insert = 0; /* Check this will fit on the current line and wrap if not. */ if ((s->mode & MODE_WRAP) && s->cx > screen_size_x(s) - width) { screen_write_linefeed(ctx, 1); s->cx = 0; /* carriage return */ } /* Sanity check cursor position. */ if (s->cx > screen_size_x(s) - width || s->cy > screen_size_y(s) - 1) return; /* Handle overwriting of UTF-8 characters. */ screen_write_overwrite(ctx, width); /* * If the new character is UTF-8 wide, fill in padding cells. Have * already ensured there is enough room. */ for (xx = s->cx + 1; xx < s->cx + width; xx++) { tmp_gcp = grid_view_get_cell(gd, xx, s->cy); if (tmp_gcp != NULL) tmp_gcp->flags |= GRID_FLAG_PADDING; } /* Set the cell. */ grid_view_set_cell(gd, s->cx, s->cy, gc); /* * Move the cursor. If not wrapping, stick at the last character and * replace it. */ last = !(s->mode & MODE_WRAP); if (s->cx <= screen_size_x(s) - last - width) s->cx += width; else s->cx = screen_size_x(s) - last; /* Draw to the screen if necessary. */ if (insert) { ttyctx.num = width; tty_write(tty_cmd_insertcharacter, &ttyctx); } if (screen_check_selection(s, s->cx - width, s->cy)) { memcpy(&tmp_gc, &s->sel.cell, sizeof tmp_gc); grid_cell_get(gc, &ud); grid_cell_set(&tmp_gc, &ud); tmp_gc.flags = gc->flags & ~(GRID_FLAG_FG256|GRID_FLAG_BG256); tmp_gc.flags |= s->sel.cell.flags & (GRID_FLAG_FG256|GRID_FLAG_BG256); ttyctx.cell = &tmp_gc; tty_write(tty_cmd_cell, &ttyctx); } else { ttyctx.cell = gc; tty_write(tty_cmd_cell, &ttyctx); } } /* Combine a UTF-8 zero-width character onto the previous. */ int screen_write_combine(struct screen_write_ctx *ctx, const struct utf8_data *ud) { struct screen *s = ctx->s; struct grid *gd = s->grid; struct grid_cell *gc; struct utf8_data ud1; /* Can't combine if at 0. */ if (s->cx == 0) return (-1); /* Empty data is out. */ if (ud->size == 0) fatalx("UTF-8 data empty"); /* Retrieve the previous cell. */ gc = grid_view_get_cell(gd, s->cx - 1, s->cy); grid_cell_get(gc, &ud1); /* Check there is enough space. */ if (ud1.size + ud->size > sizeof ud1.data) return (-1); /* Append the data and set the cell. */ memcpy(ud1.data + ud1.size, ud->data, ud->size); ud1.size += ud->size; grid_cell_set(gc, &ud1); return (0); } /* * UTF-8 wide characters are a bit of an annoyance. They take up more than one * cell on the screen, so following cells must not be drawn by marking them as * padding. * * So far, so good. The problem is, when overwriting a padding cell, or a UTF-8 * character, it is necessary to also overwrite any other cells which covered * by the same character. */ void screen_write_overwrite(struct screen_write_ctx *ctx, u_int width) { struct screen *s = ctx->s; struct grid *gd = s->grid; const struct grid_cell *gc; u_int xx; gc = grid_view_peek_cell(gd, s->cx, s->cy); if (gc->flags & GRID_FLAG_PADDING) { /* * A padding cell, so clear any following and leading padding * cells back to the character. Don't overwrite the current * cell as that happens later anyway. */ xx = s->cx + 1; while (--xx > 0) { gc = grid_view_peek_cell(gd, xx, s->cy); if (!(gc->flags & GRID_FLAG_PADDING)) break; grid_view_set_cell(gd, xx, s->cy, &grid_default_cell); } /* Overwrite the character at the start of this padding. */ grid_view_set_cell(gd, xx, s->cy, &grid_default_cell); } /* * Overwrite any padding cells that belong to a UTF-8 character * we'll be overwriting with the current character. */ xx = s->cx + width - 1; while (++xx < screen_size_x(s)) { gc = grid_view_peek_cell(gd, xx, s->cy); if (!(gc->flags & GRID_FLAG_PADDING)) break; grid_view_set_cell(gd, xx, s->cy, &grid_default_cell); } } void screen_write_setselection(struct screen_write_ctx *ctx, u_char *str, u_int len) { struct tty_ctx ttyctx; screen_write_initctx(ctx, &ttyctx, 0); ttyctx.ptr = str; ttyctx.num = len; tty_write(tty_cmd_setselection, &ttyctx); } void screen_write_rawstring(struct screen_write_ctx *ctx, u_char *str, u_int len) { struct tty_ctx ttyctx; screen_write_initctx(ctx, &ttyctx, 0); ttyctx.ptr = str; ttyctx.num = len; tty_write(tty_cmd_rawstring, &ttyctx); }