diff options
Diffstat (limited to 'screen-write.c')
| -rw-r--r-- | screen-write.c | 2146 |
1 files changed, 2146 insertions, 0 deletions
diff --git a/screen-write.c b/screen-write.c new file mode 100644 index 0000000..6b6a750 --- /dev/null +++ b/screen-write.c @@ -0,0 +1,2146 @@ +/* $OpenBSD$ */ + +/* + * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com> + * + * 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 <sys/types.h> + +#include <stdlib.h> +#include <string.h> + +#include "tmux.h" + +static struct screen_write_citem *screen_write_collect_trim( + struct screen_write_ctx *, u_int, u_int, u_int, int *); +static void screen_write_collect_clear(struct screen_write_ctx *, u_int, + u_int); +static void screen_write_collect_scroll(struct screen_write_ctx *, u_int); +static void screen_write_collect_flush(struct screen_write_ctx *, int, + const char *); + +static int screen_write_overwrite(struct screen_write_ctx *, + struct grid_cell *, u_int); +static const struct grid_cell *screen_write_combine(struct screen_write_ctx *, + const struct utf8_data *, u_int *); + +struct screen_write_citem { + u_int x; + int wrapped; + + enum { TEXT, CLEAR } type; + u_int used; + u_int bg; + + struct grid_cell gc; + + TAILQ_ENTRY(screen_write_citem) entry; +}; +struct screen_write_cline { + char *data; + TAILQ_HEAD(, screen_write_citem) items; +}; +TAILQ_HEAD(, screen_write_citem) screen_write_citem_freelist = + TAILQ_HEAD_INITIALIZER(screen_write_citem_freelist); + +static struct screen_write_citem * +screen_write_get_citem(void) +{ + struct screen_write_citem *ci; + + ci = TAILQ_FIRST(&screen_write_citem_freelist); + if (ci != NULL) { + TAILQ_REMOVE(&screen_write_citem_freelist, ci, entry); + memset(ci, 0, sizeof *ci); + return (ci); + } + return (xcalloc(1, sizeof *ci)); +} + +static void +screen_write_free_citem(struct screen_write_citem *ci) +{ + TAILQ_INSERT_TAIL(&screen_write_citem_freelist, ci, entry); +} + +static void +screen_write_offset_timer(__unused int fd, __unused short events, void *data) +{ + struct window *w = data; + + tty_update_window_offset(w); +} + +/* Set cursor position. */ +static void +screen_write_set_cursor(struct screen_write_ctx *ctx, int cx, int cy) +{ + struct window_pane *wp = ctx->wp; + struct window *w; + struct screen *s = ctx->s; + struct timeval tv = { .tv_usec = 10000 }; + + if (cx != -1 && (u_int)cx == s->cx && cy != -1 && (u_int)cy == s->cy) + return; + + if (cx != -1) { + if ((u_int)cx > screen_size_x(s)) /* allow last column */ + cx = screen_size_x(s) - 1; + s->cx = cx; + } + if (cy != -1) { + if ((u_int)cy > screen_size_y(s) - 1) + cy = screen_size_y(s) - 1; + s->cy = cy; + } + + if (wp == NULL) + return; + w = wp->window; + + if (!event_initialized(&w->offset_timer)) + evtimer_set(&w->offset_timer, screen_write_offset_timer, w); + if (!evtimer_pending(&w->offset_timer, NULL)) + evtimer_add(&w->offset_timer, &tv); +} + +/* Do a full redraw. */ +static void +screen_write_redraw_cb(const struct tty_ctx *ttyctx) +{ + struct window_pane *wp = ttyctx->arg; + + if (wp != NULL) + wp->flags |= PANE_REDRAW; +} + +/* Update context for client. */ +static int +screen_write_set_client_cb(struct tty_ctx *ttyctx, struct client *c) +{ + struct window_pane *wp = ttyctx->arg; + + if (c->session->curw->window != wp->window) + return (0); + if (wp->layout_cell == NULL) + return (0); + + if (wp->flags & (PANE_REDRAW|PANE_DROP)) + return (-1); + if (c->flags & CLIENT_REDRAWPANES) { + /* + * Redraw is already deferred to redraw another pane - redraw + * this one also when that happens. + */ + log_debug("%s: adding %%%u to deferred redraw", __func__, + wp->id); + wp->flags |= PANE_REDRAW; + return (-1); + } + + ttyctx->bigger = tty_window_offset(&c->tty, &ttyctx->wox, &ttyctx->woy, + &ttyctx->wsx, &ttyctx->wsy); + + ttyctx->xoff = ttyctx->rxoff = wp->xoff; + ttyctx->yoff = ttyctx->ryoff = wp->yoff; + + if (status_at_line(c) == 0) + ttyctx->yoff += status_line_size(c); + + return (1); +} + +/* Set up context for TTY command. */ +static void +screen_write_initctx(struct screen_write_ctx *ctx, struct tty_ctx *ttyctx, + int sync) +{ + struct screen *s = ctx->s; + + memset(ttyctx, 0, sizeof *ttyctx); + + ttyctx->s = s; + ttyctx->sx = screen_size_x(s); + ttyctx->sy = screen_size_y(s); + + ttyctx->ocx = s->cx; + ttyctx->ocy = s->cy; + ttyctx->orlower = s->rlower; + ttyctx->orupper = s->rupper; + + memcpy(&ttyctx->defaults, &grid_default_cell, sizeof ttyctx->defaults); + if (ctx->init_ctx_cb != NULL) { + ctx->init_ctx_cb(ctx, ttyctx); + if (ttyctx->palette != NULL) { + if (ttyctx->defaults.fg == 8) + ttyctx->defaults.fg = ttyctx->palette->fg; + if (ttyctx->defaults.bg == 8) + ttyctx->defaults.bg = ttyctx->palette->bg; + } + } else { + ttyctx->redraw_cb = screen_write_redraw_cb; + if (ctx->wp != NULL) { + tty_default_colours(&ttyctx->defaults, ctx->wp); + ttyctx->palette = &ctx->wp->palette; + ttyctx->set_client_cb = screen_write_set_client_cb; + ttyctx->arg = ctx->wp; + } + } + + if (~ctx->flags & SCREEN_WRITE_SYNC) { + /* + * For the active pane or for an overlay (no pane), we want to + * only use synchronized updates if requested (commands that + * move the cursor); for other panes, always use it, since the + * cursor will have to move. + */ + if (ctx->wp != NULL) { + if (ctx->wp != ctx->wp->window->active) + ttyctx->num = 1; + else + ttyctx->num = sync; + } else + ttyctx->num = 0x10|sync; + tty_write(tty_cmd_syncstart, ttyctx); + ctx->flags |= SCREEN_WRITE_SYNC; + } +} + +/* Make write list. */ +void +screen_write_make_list(struct screen *s) +{ + u_int y; + + s->write_list = xcalloc(screen_size_y(s), sizeof *s->write_list); + for (y = 0; y < screen_size_y(s); y++) + TAILQ_INIT(&s->write_list[y].items); +} + +/* Free write list. */ +void +screen_write_free_list(struct screen *s) +{ + u_int y; + + for (y = 0; y < screen_size_y(s); y++) + free(s->write_list[y].data); + free(s->write_list); +} + +/* Set up for writing. */ +static void +screen_write_init(struct screen_write_ctx *ctx, struct screen *s) +{ + memset(ctx, 0, sizeof *ctx); + + ctx->s = s; + + if (ctx->s->write_list == NULL) + screen_write_make_list(ctx->s); + ctx->item = screen_write_get_citem(); + + ctx->scrolled = 0; + ctx->bg = 8; +} + +/* Initialize writing with a pane. */ +void +screen_write_start_pane(struct screen_write_ctx *ctx, struct window_pane *wp, + struct screen *s) +{ + if (s == NULL) + s = wp->screen; + screen_write_init(ctx, s); + ctx->wp = wp; + + if (log_get_level() != 0) { + log_debug("%s: size %ux%u, pane %%%u (at %u,%u)", + __func__, screen_size_x(ctx->s), screen_size_y(ctx->s), + wp->id, wp->xoff, wp->yoff); + } +} + +/* Initialize writing with a callback. */ +void +screen_write_start_callback(struct screen_write_ctx *ctx, struct screen *s, + screen_write_init_ctx_cb cb, void *arg) +{ + screen_write_init(ctx, s); + + ctx->init_ctx_cb = cb; + ctx->arg = arg; + + if (log_get_level() != 0) { + log_debug("%s: size %ux%u, with callback", __func__, + screen_size_x(ctx->s), screen_size_y(ctx->s)); + } +} + +/* Initialize writing. */ +void +screen_write_start(struct screen_write_ctx *ctx, struct screen *s) +{ + screen_write_init(ctx, s); + + if (log_get_level() != 0) { + log_debug("%s: size %ux%u, no pane", __func__, + screen_size_x(ctx->s), screen_size_y(ctx->s)); + } +} + +/* Finish writing. */ +void +screen_write_stop(struct screen_write_ctx *ctx) +{ + screen_write_collect_end(ctx); + screen_write_collect_flush(ctx, 0, __func__); + + screen_write_free_citem(ctx->item); +} + +/* 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_CURSOR | MODE_WRAP; + + screen_write_clearscreen(ctx, 8); + screen_write_set_cursor(ctx, 0, 0); +} + +/* Write character. */ +void +screen_write_putc(struct screen_write_ctx *ctx, const struct grid_cell *gcp, + u_char ch) +{ + struct grid_cell gc; + + memcpy(&gc, gcp, sizeof gc); + + utf8_set(&gc.data, ch); + screen_write_cell(ctx, &gc); +} + +/* Calculate string length. */ +size_t +screen_write_strlen(const char *fmt, ...) +{ + va_list ap; + char *msg; + struct utf8_data ud; + u_char *ptr; + size_t left, size = 0; + enum utf8_state more; + + va_start(ap, fmt); + xvasprintf(&msg, fmt, ap); + va_end(ap); + + ptr = msg; + while (*ptr != '\0') { + if (*ptr > 0x7f && utf8_open(&ud, *ptr) == UTF8_MORE) { + ptr++; + + left = strlen(ptr); + if (left < (size_t)ud.size - 1) + break; + while ((more = utf8_append(&ud, *ptr)) == UTF8_MORE) + ptr++; + ptr++; + + if (more == UTF8_DONE) + size += ud.width; + } else { + if (*ptr > 0x1f && *ptr < 0x7f) + size++; + ptr++; + } + } + + free(msg); + return (size); +} + +/* Write string wrapped over lines. */ +int +screen_write_text(struct screen_write_ctx *ctx, u_int cx, u_int width, + u_int lines, int more, const struct grid_cell *gcp, const char *fmt, ...) +{ + struct screen *s = ctx->s; + va_list ap; + char *tmp; + u_int cy = s->cy, i, end, next, idx = 0, at, left; + struct utf8_data *text; + struct grid_cell gc; + + memcpy(&gc, gcp, sizeof gc); + + va_start(ap, fmt); + xvasprintf(&tmp, fmt, ap); + va_end(ap); + + text = utf8_fromcstr(tmp); + free(tmp); + + left = (cx + width) - s->cx; + for (;;) { + /* Find the end of what can fit on the line. */ + at = 0; + for (end = idx; text[end].size != 0; end++) { + if (text[end].size == 1 && text[end].data[0] == '\n') + break; + if (at + text[end].width > left) + break; + at += text[end].width; + } + + /* + * If we're on a space, that's the end. If not, walk back to + * try and find one. + */ + if (text[end].size == 0) + next = end; + else if (text[end].size == 1 && text[end].data[0] == '\n') + next = end + 1; + else if (text[end].size == 1 && text[end].data[0] == ' ') + next = end + 1; + else { + for (i = end; i > idx; i--) { + if (text[i].size == 1 && text[i].data[0] == ' ') + break; + } + if (i != idx) { + next = i + 1; + end = i; + } else + next = end; + } + + /* Print the line. */ + for (i = idx; i < end; i++) { + utf8_copy(&gc.data, &text[i]); + screen_write_cell(ctx, &gc); + } + + /* If at the bottom, stop. */ + idx = next; + if (s->cy == cy + lines - 1 || text[idx].size == 0) + break; + + screen_write_cursormove(ctx, cx, s->cy + 1, 0); + left = width; + } + + /* + * Fail if on the last line and there is more to come or at the end, or + * if the text was not entirely consumed. + */ + if ((s->cy == cy + lines - 1 && (!more || s->cx == cx + width)) || + text[idx].size != 0) { + free(text); + return (0); + } + free(text); + + /* + * If no more to come, move to the next line. Otherwise, leave on + * the same line (except if at the end). + */ + if (!more || s->cx == cx + width) + screen_write_cursormove(ctx, cx, s->cy + 1, 0); + return (1); +} + +/* Write simple string (no maximum length). */ +void +screen_write_puts(struct screen_write_ctx *ctx, const struct grid_cell *gcp, + const char *fmt, ...) +{ + va_list ap; + + va_start(ap, fmt); + screen_write_vnputs(ctx, -1, gcp, fmt, ap); + va_end(ap); +} + +/* Write string with length limit (-1 for unlimited). */ +void +screen_write_nputs(struct screen_write_ctx *ctx, ssize_t maxlen, + const struct grid_cell *gcp, const char *fmt, ...) +{ + va_list ap; + + va_start(ap, fmt); + screen_write_vnputs(ctx, maxlen, gcp, fmt, ap); + va_end(ap); +} + +void +screen_write_vnputs(struct screen_write_ctx *ctx, ssize_t maxlen, + const struct grid_cell *gcp, const char *fmt, va_list ap) +{ + struct grid_cell gc; + struct utf8_data *ud = &gc.data; + char *msg; + u_char *ptr; + size_t left, size = 0; + enum utf8_state more; + + memcpy(&gc, gcp, sizeof gc); + xvasprintf(&msg, fmt, ap); + + ptr = msg; + while (*ptr != '\0') { + if (*ptr > 0x7f && utf8_open(ud, *ptr) == UTF8_MORE) { + ptr++; + + left = strlen(ptr); + if (left < (size_t)ud->size - 1) + break; + while ((more = utf8_append(ud, *ptr)) == UTF8_MORE) + ptr++; + ptr++; + + if (more != UTF8_DONE) + continue; + if (maxlen > 0 && size + ud->width > (size_t)maxlen) { + while (size < (size_t)maxlen) { + screen_write_putc(ctx, &gc, ' '); + size++; + } + break; + } + size += ud->width; + screen_write_cell(ctx, &gc); + } else { + if (maxlen > 0 && size + 1 > (size_t)maxlen) + break; + + if (*ptr == '\001') + gc.attr ^= GRID_ATTR_CHARSET; + else if (*ptr == '\n') { + screen_write_linefeed(ctx, 0, 8); + screen_write_carriagereturn(ctx); + } else if (*ptr > 0x1f && *ptr < 0x7f) { + size++; + screen_write_putc(ctx, &gc, *ptr); + } + ptr++; + } + } + + free(msg); +} + +/* + * Copy from another screen but without the selection stuff. Assumes the target + * region is already big enough. + */ +void +screen_write_fast_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_cell gc; + u_int xx, yy, cx, cy; + + if (nx == 0 || ny == 0) + return; + + cy = s->cy; + for (yy = py; yy < py + ny; yy++) { + if (yy >= gd->hsize + gd->sy) + break; + cx = s->cx; + for (xx = px; xx < px + nx; xx++) { + if (xx >= grid_get_line(gd, yy)->cellsize) + break; + grid_get_cell(gd, xx, yy, &gc); + if (xx + gc.data.width > px + nx) + break; + grid_view_set_cell(ctx->s->grid, cx, cy, &gc); + cx++; + } + cy++; + } +} + +/* Draw a horizontal line on screen. */ +void +screen_write_hline(struct screen_write_ctx *ctx, u_int nx, int left, int right) +{ + struct screen *s = ctx->s; + struct grid_cell gc; + u_int cx, cy, i; + + cx = s->cx; + cy = s->cy; + + memcpy(&gc, &grid_default_cell, sizeof gc); + gc.attr |= GRID_ATTR_CHARSET; + + screen_write_putc(ctx, &gc, left ? 't' : 'q'); + for (i = 1; i < nx - 1; i++) + screen_write_putc(ctx, &gc, 'q'); + screen_write_putc(ctx, &gc, right ? 'u' : 'q'); + + screen_write_set_cursor(ctx, cx, cy); +} + +/* Draw a vertical line on screen. */ +void +screen_write_vline(struct screen_write_ctx *ctx, u_int ny, int top, int bottom) +{ + struct screen *s = ctx->s; + struct grid_cell gc; + u_int cx, cy, i; + + cx = s->cx; + cy = s->cy; + + memcpy(&gc, &grid_default_cell, sizeof gc); + gc.attr |= GRID_ATTR_CHARSET; + + screen_write_putc(ctx, &gc, top ? 'w' : 'x'); + for (i = 1; i < ny - 1; i++) { + screen_write_set_cursor(ctx, cx, cy + i); + screen_write_putc(ctx, &gc, 'x'); + } + screen_write_set_cursor(ctx, cx, cy + ny - 1); + screen_write_putc(ctx, &gc, bottom ? 'v' : 'x'); + + screen_write_set_cursor(ctx, cx, cy); +} + +/* Draw a menu on screen. */ +void +screen_write_menu(struct screen_write_ctx *ctx, struct menu *menu, + int choice, const struct grid_cell *choice_gc) +{ + struct screen *s = ctx->s; + struct grid_cell default_gc; + const struct grid_cell *gc = &default_gc; + u_int cx, cy, i, j; + const char *name; + + cx = s->cx; + cy = s->cy; + + memcpy(&default_gc, &grid_default_cell, sizeof default_gc); + + screen_write_box(ctx, menu->width + 4, menu->count + 2, + BOX_LINES_DEFAULT, &default_gc, menu->title); + + for (i = 0; i < menu->count; i++) { + name = menu->items[i].name; + if (name == NULL) { + screen_write_cursormove(ctx, cx, cy + 1 + i, 0); + screen_write_hline(ctx, menu->width + 4, 1, 1); + } else { + if (choice >= 0 && i == (u_int)choice && *name != '-') + gc = choice_gc; + screen_write_cursormove(ctx, cx + 2, cy + 1 + i, 0); + for (j = 0; j < menu->width; j++) + screen_write_putc(ctx, gc, ' '); + screen_write_cursormove(ctx, cx + 2, cy + 1 + i, 0); + if (*name == '-') { + name++; + default_gc.attr |= GRID_ATTR_DIM; + format_draw(ctx, gc, menu->width, name, NULL, + 0); + default_gc.attr &= ~GRID_ATTR_DIM; + } else + format_draw(ctx, gc, menu->width, name, NULL, + gc == choice_gc); + gc = &default_gc; + } + } + + screen_write_set_cursor(ctx, cx, cy); +} + +static void +screen_write_box_border_set(enum box_lines box_lines, int cell_type, + struct grid_cell *gc) +{ + switch (box_lines) { + case BOX_LINES_NONE: + break; + case BOX_LINES_DOUBLE: + gc->attr &= ~GRID_ATTR_CHARSET; + utf8_copy(&gc->data, tty_acs_double_borders(cell_type)); + break; + case BOX_LINES_HEAVY: + gc->attr &= ~GRID_ATTR_CHARSET; + utf8_copy(&gc->data, tty_acs_heavy_borders(cell_type)); + break; + case BOX_LINES_ROUNDED: + gc->attr &= ~GRID_ATTR_CHARSET; + utf8_copy(&gc->data, tty_acs_rounded_borders(cell_type)); + break; + case BOX_LINES_SIMPLE: + gc->attr &= ~GRID_ATTR_CHARSET; + utf8_set(&gc->data, SIMPLE_BORDERS[cell_type]); + break; + case BOX_LINES_PADDED: + gc->attr &= ~GRID_ATTR_CHARSET; + utf8_set(&gc->data, PADDED_BORDERS[cell_type]); + break; + case BOX_LINES_SINGLE: + case BOX_LINES_DEFAULT: + gc->attr |= GRID_ATTR_CHARSET; + utf8_set(&gc->data, CELL_BORDERS[cell_type]); + break; + } +} + +/* Draw a box on screen. */ +void +screen_write_box(struct screen_write_ctx *ctx, u_int nx, u_int ny, + enum box_lines lines, const struct grid_cell *gcp, const char *title) +{ + struct screen *s = ctx->s; + struct grid_cell gc; + u_int cx, cy, i; + + cx = s->cx; + cy = s->cy; + + if (gcp != NULL) + memcpy(&gc, gcp, sizeof gc); + else + memcpy(&gc, &grid_default_cell, sizeof gc); + + gc.attr |= GRID_ATTR_CHARSET; + gc.flags |= GRID_FLAG_NOPALETTE; + + /* Draw top border */ + screen_write_box_border_set(lines, CELL_TOPLEFT, &gc); + screen_write_cell(ctx, &gc); + screen_write_box_border_set(lines, CELL_LEFTRIGHT, &gc); + for (i = 1; i < nx - 1; i++) + screen_write_cell(ctx, &gc); + screen_write_box_border_set(lines, CELL_TOPRIGHT, &gc); + screen_write_cell(ctx, &gc); + + /* Draw bottom border */ + screen_write_set_cursor(ctx, cx, cy + ny - 1); + screen_write_box_border_set(lines, CELL_BOTTOMLEFT, &gc); + screen_write_cell(ctx, &gc); + screen_write_box_border_set(lines, CELL_LEFTRIGHT, &gc); + for (i = 1; i < nx - 1; i++) + screen_write_cell(ctx, &gc); + screen_write_box_border_set(lines, CELL_BOTTOMRIGHT, &gc); + screen_write_cell(ctx, &gc); + + /* Draw sides */ + screen_write_box_border_set(lines, CELL_TOPBOTTOM, &gc); + for (i = 1; i < ny - 1; i++) { + /* left side */ + screen_write_set_cursor(ctx, cx, cy + i); + screen_write_cell(ctx, &gc); + /* right side */ + screen_write_set_cursor(ctx, cx + nx - 1, cy + i); + screen_write_cell(ctx, &gc); + } + + if (title != NULL) { + gc.attr &= ~GRID_ATTR_CHARSET; + screen_write_cursormove(ctx, cx + 2, cy, 0); + format_draw(ctx, &gc, nx - 4, title, NULL, 0); + } + + screen_write_set_cursor(ctx, cx, cy); +} + +/* + * Write a preview version of a window. Assumes target area is big enough and + * already cleared. + */ +void +screen_write_preview(struct screen_write_ctx *ctx, struct screen *src, u_int nx, + u_int ny) +{ + struct screen *s = ctx->s; + struct grid_cell gc; + u_int cx, cy, px, py; + + cx = s->cx; + cy = s->cy; + + /* + * If the cursor is on, pick the area around the cursor, otherwise use + * the top left. + */ + if (src->mode & MODE_CURSOR) { + px = src->cx; + if (px < nx / 3) + px = 0; + else + px = px - nx / 3; + if (px + nx > screen_size_x(src)) { + if (nx > screen_size_x(src)) + px = 0; + else + px = screen_size_x(src) - nx; + } + py = src->cy; + if (py < ny / 3) + py = 0; + else + py = py - ny / 3; + if (py + ny > screen_size_y(src)) { + if (ny > screen_size_y(src)) + py = 0; + else + py = screen_size_y(src) - ny; + } + } else { + px = 0; + py = 0; + } + + screen_write_fast_copy(ctx, src, px, src->grid->hsize + py, nx, ny); + + if (src->mode & MODE_CURSOR) { + grid_view_get_cell(src->grid, src->cx, src->cy, &gc); + gc.attr |= GRID_ATTR_REVERSE; + screen_write_set_cursor(ctx, cx + (src->cx - px), + cy + (src->cy - py)); + screen_write_cell(ctx, &gc); + } +} + +/* Set a mode. */ +void +screen_write_mode_set(struct screen_write_ctx *ctx, int mode) +{ + struct screen *s = ctx->s; + + s->mode |= mode; + + if (log_get_level() != 0) + log_debug("%s: %s", __func__, screen_mode_to_string(mode)); +} + +/* Clear a mode. */ +void +screen_write_mode_clear(struct screen_write_ctx *ctx, int mode) +{ + struct screen *s = ctx->s; + + s->mode &= ~mode; + + if (log_get_level() != 0) + log_debug("%s: %s", __func__, screen_mode_to_string(mode)); +} + +/* Cursor up by ny. */ +void +screen_write_cursorup(struct screen_write_ctx *ctx, u_int ny) +{ + struct screen *s = ctx->s; + u_int cx = s->cx, cy = s->cy; + + if (ny == 0) + ny = 1; + + if (cy < s->rupper) { + /* Above region. */ + if (ny > cy) + ny = cy; + } else { + /* Below region. */ + if (ny > cy - s->rupper) + ny = cy - s->rupper; + } + if (cx == screen_size_x(s)) + cx--; + + cy -= ny; + + screen_write_set_cursor(ctx, cx, cy); +} + +/* Cursor down by ny. */ +void +screen_write_cursordown(struct screen_write_ctx *ctx, u_int ny) +{ + struct screen *s = ctx->s; + u_int cx = s->cx, cy = s->cy; + + if (ny == 0) + ny = 1; + + if (cy > s->rlower) { + /* Below region. */ + if (ny > screen_size_y(s) - 1 - cy) + ny = screen_size_y(s) - 1 - cy; + } else { + /* Above region. */ + if (ny > s->rlower - cy) + ny = s->rlower - cy; + } + if (cx == screen_size_x(s)) + cx--; + else if (ny == 0) + return; + + cy += ny; + + screen_write_set_cursor(ctx, cx, cy); +} + +/* Cursor right by nx. */ +void +screen_write_cursorright(struct screen_write_ctx *ctx, u_int nx) +{ + struct screen *s = ctx->s; + u_int cx = s->cx, cy = s->cy; + + if (nx == 0) + nx = 1; + + if (nx > screen_size_x(s) - 1 - cx) + nx = screen_size_x(s) - 1 - cx; + if (nx == 0) + return; + + cx += nx; + + screen_write_set_cursor(ctx, cx, cy); +} + +/* Cursor left by nx. */ +void +screen_write_cursorleft(struct screen_write_ctx *ctx, u_int nx) +{ + struct screen *s = ctx->s; + u_int cx = s->cx, cy = s->cy; + + if (nx == 0) + nx = 1; + + if (nx > cx) + nx = cx; + if (nx == 0) + return; + + cx -= nx; + + screen_write_set_cursor(ctx, cx, cy); +} + +/* 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; + u_int cx = s->cx, cy = s->cy; + + if (cx == 0) { + if (cy == 0) + return; + gl = grid_get_line(s->grid, s->grid->hsize + cy - 1); + if (gl->flags & GRID_LINE_WRAPPED) { + cy--; + cx = screen_size_x(s) - 1; + } + } else + cx--; + + screen_write_set_cursor(ctx, cx, cy); +} + +/* 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; + + memcpy(&gc, &grid_default_cell, sizeof gc); + utf8_set(&gc.data, '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); + } + + screen_write_set_cursor(ctx, 0, 0); + + s->rupper = 0; + s->rlower = screen_size_y(s) - 1; + + screen_write_initctx(ctx, &ttyctx, 1); + + screen_write_collect_clear(ctx, 0, 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, u_int bg) +{ + 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; + + if (s->cx > screen_size_x(s) - 1) + return; + + screen_write_initctx(ctx, &ttyctx, 0); + ttyctx.bg = bg; + + grid_view_insert_cells(s->grid, s->cx, s->cy, nx, bg); + + screen_write_collect_flush(ctx, 0, __func__); + ttyctx.num = nx; + tty_write(tty_cmd_insertcharacter, &ttyctx); +} + +/* Delete nx characters. */ +void +screen_write_deletecharacter(struct screen_write_ctx *ctx, u_int nx, u_int bg) +{ + 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; + + if (s->cx > screen_size_x(s) - 1) + return; + + screen_write_initctx(ctx, &ttyctx, 0); + ttyctx.bg = bg; + + grid_view_delete_cells(s->grid, s->cx, s->cy, nx, bg); + + screen_write_collect_flush(ctx, 0, __func__); + ttyctx.num = nx; + tty_write(tty_cmd_deletecharacter, &ttyctx); +} + +/* Clear nx characters. */ +void +screen_write_clearcharacter(struct screen_write_ctx *ctx, u_int nx, u_int bg) +{ + 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; + + if (s->cx > screen_size_x(s) - 1) + return; + + screen_write_initctx(ctx, &ttyctx, 0); + ttyctx.bg = bg; + + grid_view_clear(s->grid, s->cx, s->cy, nx, 1, bg); + + screen_write_collect_flush(ctx, 0, __func__); + ttyctx.num = nx; + tty_write(tty_cmd_clearcharacter, &ttyctx); +} + +/* Insert ny lines. */ +void +screen_write_insertline(struct screen_write_ctx *ctx, u_int ny, u_int bg) +{ + struct screen *s = ctx->s; + struct grid *gd = s->grid; + 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, 1); + ttyctx.bg = bg; + + grid_view_insert_lines(gd, s->cy, ny, bg); + + screen_write_collect_flush(ctx, 0, __func__); + 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, 1); + ttyctx.bg = bg; + + if (s->cy < s->rupper || s->cy > s->rlower) + grid_view_insert_lines(gd, s->cy, ny, bg); + else + grid_view_insert_lines_region(gd, s->rlower, s->cy, ny, bg); + + screen_write_collect_flush(ctx, 0, __func__); + + ttyctx.num = ny; + tty_write(tty_cmd_insertline, &ttyctx); +} + +/* Delete ny lines. */ +void +screen_write_deleteline(struct screen_write_ctx *ctx, u_int ny, u_int bg) +{ + struct screen *s = ctx->s; + struct grid *gd = s->grid; + 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, 1); + ttyctx.bg = bg; + + grid_view_delete_lines(gd, s->cy, ny, bg); + + screen_write_collect_flush(ctx, 0, __func__); + 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, 1); + ttyctx.bg = bg; + + if (s->cy < s->rupper || s->cy > s->rlower) + grid_view_delete_lines(gd, s->cy, ny, bg); + else + grid_view_delete_lines_region(gd, s->rlower, s->cy, ny, bg); + + screen_write_collect_flush(ctx, 0, __func__); + ttyctx.num = ny; + tty_write(tty_cmd_deleteline, &ttyctx); +} + +/* Clear line at cursor. */ +void +screen_write_clearline(struct screen_write_ctx *ctx, u_int bg) +{ + struct screen *s = ctx->s; + struct grid_line *gl; + u_int sx = screen_size_x(s); + struct screen_write_citem *ci = ctx->item; + + gl = grid_get_line(s->grid, s->grid->hsize + s->cy); + if (gl->cellsize == 0 && COLOUR_DEFAULT(bg)) + return; + + grid_view_clear(s->grid, 0, s->cy, sx, 1, bg); + + screen_write_collect_clear(ctx, s->cy, 1); + ci->x = 0; + ci->used = sx; + ci->type = CLEAR; + ci->bg = bg; + TAILQ_INSERT_TAIL(&ctx->s->write_list[s->cy].items, ci, entry); + ctx->item = screen_write_get_citem(); +} + +/* Clear to end of line from cursor. */ +void +screen_write_clearendofline(struct screen_write_ctx *ctx, u_int bg) +{ + struct screen *s = ctx->s; + struct grid_line *gl; + u_int sx = screen_size_x(s); + struct screen_write_citem *ci = ctx->item, *before; + + if (s->cx == 0) { + screen_write_clearline(ctx, bg); + return; + } + + gl = grid_get_line(s->grid, s->grid->hsize + s->cy); + if (s->cx > sx - 1 || (s->cx >= gl->cellsize && COLOUR_DEFAULT(bg))) + return; + + grid_view_clear(s->grid, s->cx, s->cy, sx - s->cx, 1, bg); + + before = screen_write_collect_trim(ctx, s->cy, s->cx, sx - s->cx, NULL); + ci->x = s->cx; + ci->used = sx - s->cx; + ci->type = CLEAR; + ci->bg = bg; + if (before == NULL) + TAILQ_INSERT_TAIL(&ctx->s->write_list[s->cy].items, ci, entry); + else + TAILQ_INSERT_BEFORE(before, ci, entry); + ctx->item = screen_write_get_citem(); +} + +/* Clear to start of line from cursor. */ +void +screen_write_clearstartofline(struct screen_write_ctx *ctx, u_int bg) +{ + struct screen *s = ctx->s; + u_int sx = screen_size_x(s); + struct screen_write_citem *ci = ctx->item, *before; + + if (s->cx >= sx - 1) { + screen_write_clearline(ctx, bg); + return; + } + + if (s->cx > sx - 1) + grid_view_clear(s->grid, 0, s->cy, sx, 1, bg); + else + grid_view_clear(s->grid, 0, s->cy, s->cx + 1, 1, bg); + + before = screen_write_collect_trim(ctx, s->cy, 0, s->cx + 1, NULL); + ci->x = 0; + ci->used = s->cx + 1; + ci->type = CLEAR; + ci->bg = bg; + if (before == NULL) + TAILQ_INSERT_TAIL(&ctx->s->write_list[s->cy].items, ci, entry); + else + TAILQ_INSERT_BEFORE(before, ci, entry); + ctx->item = screen_write_get_citem(); +} + +/* Move cursor to px,py. */ +void +screen_write_cursormove(struct screen_write_ctx *ctx, int px, int py, + int origin) +{ + struct screen *s = ctx->s; + + if (origin && py != -1 && (s->mode & MODE_ORIGIN)) { + if ((u_int)py > s->rlower - s->rupper) + py = s->rlower; + else + py += s->rupper; + } + + if (px != -1 && (u_int)px > screen_size_x(s) - 1) + px = screen_size_x(s) - 1; + if (py != -1 && (u_int)py > screen_size_y(s) - 1) + py = screen_size_y(s) - 1; + + log_debug("%s: from %u,%u to %u,%u", __func__, s->cx, s->cy, px, py); + screen_write_set_cursor(ctx, px, py); +} + +/* Reverse index (up with scroll). */ +void +screen_write_reverseindex(struct screen_write_ctx *ctx, u_int bg) +{ + struct screen *s = ctx->s; + struct tty_ctx ttyctx; + + if (s->cy == s->rupper) { + grid_view_scroll_region_down(s->grid, s->rupper, s->rlower, bg); + screen_write_collect_flush(ctx, 0, __func__); + + screen_write_initctx(ctx, &ttyctx, 1); + ttyctx.bg = bg; + + tty_write(tty_cmd_reverseindex, &ttyctx); + } else if (s->cy > 0) + screen_write_set_cursor(ctx, -1, s->cy - 1); + +} + +/* 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; + + screen_write_collect_flush(ctx, 0, __func__); + + /* Cursor moves to top-left. */ + screen_write_set_cursor(ctx, 0, 0); + + s->rupper = rupper; + s->rlower = rlower; +} + +/* Line feed. */ +void +screen_write_linefeed(struct screen_write_ctx *ctx, int wrapped, u_int bg) +{ + struct screen *s = ctx->s; + struct grid *gd = s->grid; + struct grid_line *gl; + + gl = grid_get_line(gd, gd->hsize + s->cy); + if (wrapped) + gl->flags |= GRID_LINE_WRAPPED; + + log_debug("%s: at %u,%u (region %u-%u)", __func__, s->cx, s->cy, + s->rupper, s->rlower); + + if (bg != ctx->bg) { + screen_write_collect_flush(ctx, 1, __func__); + ctx->bg = bg; + } + + if (s->cy == s->rlower) { + grid_view_scroll_region_up(gd, s->rupper, s->rlower, bg); + screen_write_collect_scroll(ctx, bg); + ctx->scrolled++; + } else if (s->cy < screen_size_y(s) - 1) + screen_write_set_cursor(ctx, -1, s->cy + 1); +} + +/* Scroll up. */ +void +screen_write_scrollup(struct screen_write_ctx *ctx, u_int lines, u_int bg) +{ + struct screen *s = ctx->s; + struct grid *gd = s->grid; + u_int i; + + if (lines == 0) + lines = 1; + else if (lines > s->rlower - s->rupper + 1) + lines = s->rlower - s->rupper + 1; + + if (bg != ctx->bg) { + screen_write_collect_flush(ctx, 1, __func__); + ctx->bg = bg; + } + + for (i = 0; i < lines; i++) { + grid_view_scroll_region_up(gd, s->rupper, s->rlower, bg); + screen_write_collect_scroll(ctx, bg); + } + ctx->scrolled += lines; +} + +/* Scroll down. */ +void +screen_write_scrolldown(struct screen_write_ctx *ctx, u_int lines, u_int bg) +{ + struct screen *s = ctx->s; + struct grid *gd = s->grid; + struct tty_ctx ttyctx; + u_int i; + + screen_write_initctx(ctx, &ttyctx, 1); + ttyctx.bg = bg; + + if (lines == 0) + lines = 1; + else if (lines > s->rlower - s->rupper + 1) + lines = s->rlower - s->rupper + 1; + + for (i = 0; i < lines; i++) + grid_view_scroll_region_down(gd, s->rupper, s->rlower, bg); + + screen_write_collect_flush(ctx, 0, __func__); + ttyctx.num = lines; + tty_write(tty_cmd_scrolldown, &ttyctx); +} + +/* Carriage return (cursor to start of line). */ +void +screen_write_carriagereturn(struct screen_write_ctx *ctx) +{ + screen_write_set_cursor(ctx, 0, -1); +} + +/* Clear to end of screen from cursor. */ +void +screen_write_clearendofscreen(struct screen_write_ctx *ctx, u_int bg) +{ + struct screen *s = ctx->s; + struct grid *gd = s->grid; + struct tty_ctx ttyctx; + u_int sx = screen_size_x(s), sy = screen_size_y(s); + + screen_write_initctx(ctx, &ttyctx, 1); + ttyctx.bg = bg; + + /* Scroll into history if it is enabled and clearing entire screen. */ + if (s->cx == 0 && + s->cy == 0 && + (gd->flags & GRID_HISTORY) && + ctx->wp != NULL && + options_get_number(ctx->wp->options, "scroll-on-clear")) + grid_view_clear_history(gd, bg); + else { + if (s->cx <= sx - 1) + grid_view_clear(gd, s->cx, s->cy, sx - s->cx, 1, bg); + grid_view_clear(gd, 0, s->cy + 1, sx, sy - (s->cy + 1), bg); + } + + screen_write_collect_clear(ctx, s->cy + 1, sy - (s->cy + 1)); + screen_write_collect_flush(ctx, 0, __func__); + tty_write(tty_cmd_clearendofscreen, &ttyctx); +} + +/* Clear to start of screen. */ +void +screen_write_clearstartofscreen(struct screen_write_ctx *ctx, u_int bg) +{ + struct screen *s = ctx->s; + struct tty_ctx ttyctx; + u_int sx = screen_size_x(s); + + screen_write_initctx(ctx, &ttyctx, 1); + ttyctx.bg = bg; + + if (s->cy > 0) + grid_view_clear(s->grid, 0, 0, sx, s->cy, bg); + if (s->cx > sx - 1) + grid_view_clear(s->grid, 0, s->cy, sx, 1, bg); + else + grid_view_clear(s->grid, 0, s->cy, s->cx + 1, 1, bg); + + screen_write_collect_clear(ctx, 0, s->cy); + screen_write_collect_flush(ctx, 0, __func__); + tty_write(tty_cmd_clearstartofscreen, &ttyctx); +} + +/* Clear entire screen. */ +void +screen_write_clearscreen(struct screen_write_ctx *ctx, u_int bg) +{ + struct screen *s = ctx->s; + struct tty_ctx ttyctx; + u_int sx = screen_size_x(s), sy = screen_size_y(s); + + screen_write_initctx(ctx, &ttyctx, 1); + ttyctx.bg = bg; + + /* Scroll into history if it is enabled. */ + if ((s->grid->flags & GRID_HISTORY) && + ctx->wp != NULL && + options_get_number(ctx->wp->options, "scroll-on-clear")) + grid_view_clear_history(s->grid, bg); + else + grid_view_clear(s->grid, 0, 0, sx, sy, bg); + + screen_write_collect_clear(ctx, 0, sy); + tty_write(tty_cmd_clearscreen, &ttyctx); +} + +/* Clear entire history. */ +void +screen_write_clearhistory(struct screen_write_ctx *ctx) +{ + grid_clear_history(ctx->s->grid); +} + +/* Force a full redraw. */ +void +screen_write_fullredraw(struct screen_write_ctx *ctx) +{ + struct tty_ctx ttyctx; + + screen_write_collect_flush(ctx, 0, __func__); + + screen_write_initctx(ctx, &ttyctx, 1); + ttyctx.redraw_cb(&ttyctx); +} + +/* Trim collected items. */ +static struct screen_write_citem * +screen_write_collect_trim(struct screen_write_ctx *ctx, u_int y, u_int x, + u_int used, int *wrapped) +{ + struct screen_write_cline *cl = &ctx->s->write_list[y]; + struct screen_write_citem *ci, *ci2, *tmp, *before = NULL; + u_int sx = x, ex = x + used - 1; + u_int csx, cex; + + if (TAILQ_EMPTY(&cl->items)) + return (NULL); + TAILQ_FOREACH_SAFE(ci, &cl->items, entry, tmp) { + csx = ci->x; + cex = ci->x + ci->used - 1; + + /* Item is entirely before. */ + if (cex < sx) { + log_debug("%s: %p %u-%u before %u-%u", __func__, ci, + csx, cex, sx, ex); + continue; + } + + /* Item is entirely after. */ + if (csx > ex) { + log_debug("%s: %p %u-%u after %u-%u", __func__, ci, + csx, cex, sx, ex); + before = ci; + break; + } + + /* Item is entirely inside. */ + if (csx >= sx && cex <= ex) { + log_debug("%s: %p %u-%u inside %u-%u", __func__, ci, + csx, cex, sx, ex); + TAILQ_REMOVE(&cl->items, ci, entry); + screen_write_free_citem(ci); + if (csx == 0 && ci->wrapped && wrapped != NULL) + *wrapped = 1; + continue; + } + + /* Item under the start. */ + if (csx < sx && cex >= sx && cex <= ex) { + log_debug("%s: %p %u-%u start %u-%u", __func__, ci, + csx, cex, sx, ex); + ci->used = sx - csx; + log_debug("%s: %p now %u-%u", __func__, ci, ci->x, + ci->x + ci->used + 1); + continue; + } + + /* Item covers the end. */ + if (cex > ex && csx >= sx && csx <= ex) { + log_debug("%s: %p %u-%u end %u-%u", __func__, ci, + csx, cex, sx, ex); + ci->x = ex + 1; + ci->used = cex - ex; + log_debug("%s: %p now %u-%u", __func__, ci, ci->x, + ci->x + ci->used + 1); + before = ci; + break; + } + + /* Item must cover both sides. */ + log_debug("%s: %p %u-%u under %u-%u", __func__, ci, + csx, cex, sx, ex); + ci2 = screen_write_get_citem(); + ci2->type = ci->type; + ci2->bg = ci->bg; + memcpy(&ci2->gc, &ci->gc, sizeof ci2->gc); + TAILQ_INSERT_AFTER(&cl->items, ci, ci2, entry); + + ci->used = sx - csx; + ci2->x = ex + 1; + ci2->used = cex - ex; + + log_debug("%s: %p now %u-%u (%p) and %u-%u (%p)", __func__, ci, + ci->x, ci->x + ci->used - 1, ci, ci2->x, + ci2->x + ci2->used - 1, ci2); + before = ci2; + break; + } + return (before); +} + +/* Clear collected lines. */ +static void +screen_write_collect_clear(struct screen_write_ctx *ctx, u_int y, u_int n) +{ + struct screen_write_cline *cl; + u_int i; + + for (i = y; i < y + n; i++) { + cl = &ctx->s->write_list[i]; + TAILQ_CONCAT(&screen_write_citem_freelist, &cl->items, entry); + } +} + +/* Scroll collected lines up. */ +static void +screen_write_collect_scroll(struct screen_write_ctx *ctx, u_int bg) +{ + struct screen *s = ctx->s; + struct screen_write_cline *cl; + u_int y; + char *saved; + struct screen_write_citem *ci; + + log_debug("%s: at %u,%u (region %u-%u)", __func__, s->cx, s->cy, + s->rupper, s->rlower); + + screen_write_collect_clear(ctx, s->rupper, 1); + saved = ctx->s->write_list[s->rupper].data; + for (y = s->rupper; y < s->rlower; y++) { + cl = &ctx->s->write_list[y + 1]; + TAILQ_CONCAT(&ctx->s->write_list[y].items, &cl->items, entry); + ctx->s->write_list[y].data = cl->data; + } + ctx->s->write_list[s->rlower].data = saved; + + ci = screen_write_get_citem(); + ci->x = 0; + ci->used = screen_size_x(s); + ci->type = CLEAR; + ci->bg = bg; + TAILQ_INSERT_TAIL(&ctx->s->write_list[s->rlower].items, ci, entry); +} + +/* Flush collected lines. */ +static void +screen_write_collect_flush(struct screen_write_ctx *ctx, int scroll_only, + const char *from) +{ + struct screen *s = ctx->s; + struct screen_write_citem *ci, *tmp; + struct screen_write_cline *cl; + u_int y, cx, cy, last, items = 0; + struct tty_ctx ttyctx; + + if (ctx->scrolled != 0) { + log_debug("%s: scrolled %u (region %u-%u)", __func__, + ctx->scrolled, s->rupper, s->rlower); + if (ctx->scrolled > s->rlower - s->rupper + 1) + ctx->scrolled = s->rlower - s->rupper + 1; + + screen_write_initctx(ctx, &ttyctx, 1); + ttyctx.num = ctx->scrolled; + ttyctx.bg = ctx->bg; + tty_write(tty_cmd_scrollup, &ttyctx); + } + ctx->scrolled = 0; + ctx->bg = 8; + + if (scroll_only) + return; + + cx = s->cx; cy = s->cy; + for (y = 0; y < screen_size_y(s); y++) { + cl = &ctx->s->write_list[y]; + last = UINT_MAX; + TAILQ_FOREACH_SAFE(ci, &cl->items, entry, tmp) { + if (last != UINT_MAX && ci->x <= last) { + fatalx("collect list not in order: %u <= %u", + ci->x, last); + } + screen_write_set_cursor(ctx, ci->x, y); + if (ci->type == CLEAR) { + screen_write_initctx(ctx, &ttyctx, 1); + ttyctx.bg = ci->bg; + ttyctx.num = ci->used; + tty_write(tty_cmd_clearcharacter, &ttyctx); + } else { + screen_write_initctx(ctx, &ttyctx, 0); + ttyctx.cell = &ci->gc; + ttyctx.wrapped = ci->wrapped; + ttyctx.ptr = cl->data + ci->x; + ttyctx.num = ci->used; + tty_write(tty_cmd_cells, &ttyctx); + } + items++; + + TAILQ_REMOVE(&cl->items, ci, entry); + screen_write_free_citem(ci); + last = ci->x; + } + } + s->cx = cx; s->cy = cy; + + log_debug("%s: flushed %u items (%s)", __func__, items, from); +} + +/* Finish and store collected cells. */ +void +screen_write_collect_end(struct screen_write_ctx *ctx) +{ + struct screen *s = ctx->s; + struct screen_write_citem *ci = ctx->item, *before; + struct screen_write_cline *cl = &s->write_list[s->cy]; + struct grid_cell gc; + u_int xx; + int wrapped = ci->wrapped; + + if (ci->used == 0) + return; + + before = screen_write_collect_trim(ctx, s->cy, s->cx, ci->used, + &wrapped); + ci->x = s->cx; + ci->wrapped = wrapped; + if (before == NULL) + TAILQ_INSERT_TAIL(&cl->items, ci, entry); + else + TAILQ_INSERT_BEFORE(before, ci, entry); + ctx->item = screen_write_get_citem(); + + log_debug("%s: %u %.*s (at %u,%u)", __func__, ci->used, + (int)ci->used, cl->data + ci->x, s->cx, s->cy); + + if (s->cx != 0) { + for (xx = s->cx; xx > 0; xx--) { + grid_view_get_cell(s->grid, xx, s->cy, &gc); + if (~gc.flags & GRID_FLAG_PADDING) + break; + grid_view_set_cell(s->grid, xx, s->cy, + &grid_default_cell); + } + if (gc.data.width > 1) { + grid_view_set_cell(s->grid, xx, s->cy, + &grid_default_cell); + } + } + + grid_view_set_cells(s->grid, s->cx, s->cy, &ci->gc, cl->data + ci->x, + ci->used); + screen_write_set_cursor(ctx, s->cx + ci->used, -1); + + for (xx = s->cx; xx < screen_size_x(s); xx++) { + grid_view_get_cell(s->grid, xx, s->cy, &gc); + if (~gc.flags & GRID_FLAG_PADDING) + break; + grid_view_set_cell(s->grid, xx, s->cy, &grid_default_cell); + } +} + +/* Write cell data, collecting if necessary. */ +void +screen_write_collect_add(struct screen_write_ctx *ctx, + const struct grid_cell *gc) +{ + struct screen *s = ctx->s; + struct screen_write_citem *ci; + u_int sx = screen_size_x(s); + int collect; + + /* + * Don't need to check that the attributes and whatnot are still the + * same - input_parse will end the collection when anything that isn't + * a plain character is encountered. + */ + + collect = 1; + if (gc->data.width != 1 || gc->data.size != 1 || *gc->data.data >= 0x7f) + collect = 0; + else if (gc->attr & GRID_ATTR_CHARSET) + collect = 0; + else if (~s->mode & MODE_WRAP) + collect = 0; + else if (s->mode & MODE_INSERT) + collect = 0; + else if (s->sel != NULL) + collect = 0; + if (!collect) { + screen_write_collect_end(ctx); + screen_write_collect_flush(ctx, 0, __func__); + screen_write_cell(ctx, gc); + return; + } + + if (s->cx > sx - 1 || ctx->item->used > sx - 1 - s->cx) + screen_write_collect_end(ctx); + ci = ctx->item; /* may have changed */ + + if (s->cx > sx - 1) { + log_debug("%s: wrapped at %u,%u", __func__, s->cx, s->cy); + ci->wrapped = 1; + screen_write_linefeed(ctx, 1, 8); + screen_write_set_cursor(ctx, 0, -1); + } + + if (ci->used == 0) + memcpy(&ci->gc, gc, sizeof ci->gc); + if (ctx->s->write_list[s->cy].data == NULL) + ctx->s->write_list[s->cy].data = xmalloc(screen_size_x(ctx->s)); + ctx->s->write_list[s->cy].data[s->cx + ci->used++] = gc->data.data[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; + const struct utf8_data *ud = &gc->data; + const struct utf8_data zwj = { "\342\200\215", 0, 3, 0 }; + struct grid_line *gl; + struct grid_cell_entry *gce; + struct grid_cell tmp_gc, now_gc; + struct tty_ctx ttyctx; + u_int sx = screen_size_x(s), sy = screen_size_y(s); + u_int width = gc->data.width, xx, last, cx, cy; + int selected, skip = 1; + + /* Ignore padding cells. */ + if (gc->flags & GRID_FLAG_PADDING) + return; + + /* + * If this is a zero width joiner, set the flag so the next character + * will be treated as zero width and appended. Note that we assume a + * ZWJ will not change the width - the width of the first character is + * used. + */ + if (ud->size == 3 && memcmp(ud->data, "\342\200\215", 3) == 0) { + log_debug("zero width joiner at %u,%u", s->cx, s->cy); + ctx->flags |= SCREEN_WRITE_ZWJ; + return; + } + + /* + * If the width is zero, combine onto the previous character. We always + * combine with the cell to the left of the cursor position. In theory, + * the application could have moved the cursor somewhere else, but if + * they are silly enough to do that, who cares? + */ + if (ctx->flags & SCREEN_WRITE_ZWJ) { + screen_write_collect_flush(ctx, 0, __func__); + screen_write_combine(ctx, &zwj, &xx); + } + if (width == 0 || (ctx->flags & SCREEN_WRITE_ZWJ)) { + ctx->flags &= ~SCREEN_WRITE_ZWJ; + screen_write_collect_flush(ctx, 0, __func__); + if ((gc = screen_write_combine(ctx, ud, &xx)) != NULL) { + cx = s->cx; cy = s->cy; + screen_write_set_cursor(ctx, xx, s->cy); + screen_write_initctx(ctx, &ttyctx, 0); + ttyctx.cell = gc; + tty_write(tty_cmd_cell, &ttyctx); + s->cx = cx; s->cy = cy; + } + return; + } + + /* Flush any existing scrolling. */ + screen_write_collect_flush(ctx, 1, __func__); + + /* If this character doesn't fit, ignore it. */ + if ((~s->mode & MODE_WRAP) && + width > 1 && + (width > sx || (s->cx != sx && s->cx > sx - width))) + return; + + /* If in insert mode, make space for the cells. */ + if (s->mode & MODE_INSERT) { + grid_view_insert_cells(s->grid, s->cx, s->cy, width, 8); + skip = 0; + } + + /* Check this will fit on the current line and wrap if not. */ + if ((s->mode & MODE_WRAP) && s->cx > sx - width) { + log_debug("%s: wrapped at %u,%u", __func__, s->cx, s->cy); + screen_write_linefeed(ctx, 1, 8); + screen_write_set_cursor(ctx, 0, -1); + screen_write_collect_flush(ctx, 1, __func__); + } + + /* Sanity check cursor position. */ + if (s->cx > sx - width || s->cy > sy - 1) + return; + screen_write_initctx(ctx, &ttyctx, 0); + + /* Handle overwriting of UTF-8 characters. */ + gl = grid_get_line(s->grid, s->grid->hsize + s->cy); + if (gl->flags & GRID_LINE_EXTENDED) { + grid_view_get_cell(gd, s->cx, s->cy, &now_gc); + if (screen_write_overwrite(ctx, &now_gc, width)) + skip = 0; + } + + /* + * 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++) { + log_debug("%s: new padding at %u,%u", __func__, xx, s->cy); + grid_view_set_padding(gd, xx, s->cy); + skip = 0; + } + + /* If no change, do not draw. */ + if (skip) { + if (s->cx >= gl->cellsize) + skip = grid_cells_equal(gc, &grid_default_cell); + else { + gce = &gl->celldata[s->cx]; + if (gce->flags & GRID_FLAG_EXTENDED) + skip = 0; + else if (gc->flags != gce->flags) + skip = 0; + else if (gc->attr != gce->data.attr) + skip = 0; + else if (gc->fg != gce->data.fg) + skip = 0; + else if (gc->bg != gce->data.bg) + skip = 0; + else if (gc->data.width != 1) + skip = 0; + else if (gc->data.size != 1) + skip = 0; + else if (gce->data.data != gc->data.data[0]) + skip = 0; + } + } + + /* Update the selected flag and set the cell. */ + selected = screen_check_selection(s, s->cx, s->cy); + if (selected && (~gc->flags & GRID_FLAG_SELECTED)) { + memcpy(&tmp_gc, gc, sizeof tmp_gc); + tmp_gc.flags |= GRID_FLAG_SELECTED; + grid_view_set_cell(gd, s->cx, s->cy, &tmp_gc); + } else if (!selected && (gc->flags & GRID_FLAG_SELECTED)) { + memcpy(&tmp_gc, gc, sizeof tmp_gc); + tmp_gc.flags &= ~GRID_FLAG_SELECTED; + grid_view_set_cell(gd, s->cx, s->cy, &tmp_gc); + } else if (!skip) + grid_view_set_cell(gd, s->cx, s->cy, gc); + if (selected) + skip = 0; + + /* + * Move the cursor. If not wrapping, stick at the last character and + * replace it. + */ + last = !(s->mode & MODE_WRAP); + if (s->cx <= sx - last - width) + screen_write_set_cursor(ctx, s->cx + width, -1); + else + screen_write_set_cursor(ctx, sx - last, -1); + + /* Create space for character in insert mode. */ + if (s->mode & MODE_INSERT) { + screen_write_collect_flush(ctx, 0, __func__); + ttyctx.num = width; + tty_write(tty_cmd_insertcharacter, &ttyctx); + } + + /* Write to the screen. */ + if (!skip) { + if (selected) { + screen_select_cell(s, &tmp_gc, gc); + ttyctx.cell = &tmp_gc; + } else + ttyctx.cell = gc; + tty_write(tty_cmd_cell, &ttyctx); + } +} + +/* Combine a UTF-8 zero-width character onto the previous. */ +static const struct grid_cell * +screen_write_combine(struct screen_write_ctx *ctx, const struct utf8_data *ud, + u_int *xx) +{ + struct screen *s = ctx->s; + struct grid *gd = s->grid; + static struct grid_cell gc; + u_int n; + + /* Can't combine if at 0. */ + if (s->cx == 0) + return (NULL); + + /* Empty data is out. */ + if (ud->size == 0) + fatalx("UTF-8 data empty"); + + /* Retrieve the previous cell. */ + for (n = 1; n <= s->cx; n++) { + grid_view_get_cell(gd, s->cx - n, s->cy, &gc); + if (~gc.flags & GRID_FLAG_PADDING) + break; + } + if (n > s->cx) + return (NULL); + *xx = s->cx - n; + + /* Check there is enough space. */ + if (gc.data.size + ud->size > sizeof gc.data.data) + return (NULL); + + log_debug("%s: %.*s onto %.*s at %u,%u", __func__, (int)ud->size, + ud->data, (int)gc.data.size, gc.data.data, *xx, s->cy); + + /* Append the data. */ + memcpy(gc.data.data + gc.data.size, ud->data, ud->size); + gc.data.size += ud->size; + + /* Set the new cell. */ + grid_view_set_cell(gd, *xx, s->cy, &gc); + + return (&gc); +} + +/* + * 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. + */ +static int +screen_write_overwrite(struct screen_write_ctx *ctx, struct grid_cell *gc, + u_int width) +{ + struct screen *s = ctx->s; + struct grid *gd = s->grid; + struct grid_cell tmp_gc; + u_int xx; + int done = 0; + + 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) { + grid_view_get_cell(gd, xx, s->cy, &tmp_gc); + if (~tmp_gc.flags & GRID_FLAG_PADDING) + break; + log_debug("%s: padding at %u,%u", __func__, xx, s->cy); + grid_view_set_cell(gd, xx, s->cy, &grid_default_cell); + } + + /* Overwrite the character at the start of this padding. */ + log_debug("%s: character at %u,%u", __func__, xx, s->cy); + grid_view_set_cell(gd, xx, s->cy, &grid_default_cell); + done = 1; + } + + /* + * Overwrite any padding cells that belong to any UTF-8 characters + * we'll be overwriting with the current character. + */ + if (width != 1 || + gc->data.width != 1 || + gc->flags & GRID_FLAG_PADDING) { + xx = s->cx + width - 1; + while (++xx < screen_size_x(s)) { + grid_view_get_cell(gd, xx, s->cy, &tmp_gc); + if (~tmp_gc.flags & GRID_FLAG_PADDING) + break; + log_debug("%s: overwrite at %u,%u", __func__, xx, + s->cy); + grid_view_set_cell(gd, xx, s->cy, &grid_default_cell); + done = 1; + } + } + + return (done); +} + +/* Set external clipboard. */ +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); +} + +/* Write unmodified string. */ +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); +} + +/* Turn alternate screen on. */ +void +screen_write_alternateon(struct screen_write_ctx *ctx, struct grid_cell *gc, + int cursor) +{ + struct tty_ctx ttyctx; + struct window_pane *wp = ctx->wp; + + if (wp != NULL && !options_get_number(wp->options, "alternate-screen")) + return; + + screen_write_collect_flush(ctx, 0, __func__); + screen_alternate_on(ctx->s, gc, cursor); + + screen_write_initctx(ctx, &ttyctx, 1); + ttyctx.redraw_cb(&ttyctx); +} + +/* Turn alternate screen off. */ +void +screen_write_alternateoff(struct screen_write_ctx *ctx, struct grid_cell *gc, + int cursor) +{ + struct tty_ctx ttyctx; + struct window_pane *wp = ctx->wp; + + if (wp != NULL && !options_get_number(wp->options, "alternate-screen")) + return; + + screen_write_collect_flush(ctx, 0, __func__); + screen_alternate_off(ctx->s, gc, cursor); + + screen_write_initctx(ctx, &ttyctx, 1); + ttyctx.redraw_cb(&ttyctx); +} |