mirror of
https://github.com/tmux/tmux.git
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4179b42424
sequences (notable EL and ED but also IL, DL, ICH, DCH) create blank cells using the current background colour rather than the default colour. On modern systems BCE doesn't really have many benefits, but most other terminals now support it, some (lazy) applications rely on it, and it is not hard to include now that we have pane background colours anyway. Mostly written by Sean Haugh.
1309 lines
29 KiB
C
1309 lines
29 KiB
C
/* $OpenBSD$ */
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/*
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* Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
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* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
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* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <sys/types.h>
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#include <stdlib.h>
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#include <string.h>
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#include "tmux.h"
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static void screen_write_initctx(struct screen_write_ctx *,
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struct tty_ctx *);
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static void screen_write_save_last(struct screen_write_ctx *,
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struct tty_ctx *);
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static void screen_write_flush(struct screen_write_ctx *);
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static int screen_write_overwrite(struct screen_write_ctx *,
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struct grid_cell *, u_int);
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static int screen_write_combine(struct screen_write_ctx *,
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const struct utf8_data *);
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static const struct grid_cell screen_write_pad_cell = {
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GRID_FLAG_PADDING, 0, 8, 8, { { 0 }, 0, 0, 0 }
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};
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#define screen_dirty_bit(s, x, y) (((y) * screen_size_x(s)) + (x))
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#define screen_dirty_clear(s, sx, sy, ex, ey) \
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do { \
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if (s->dirty != NULL) { \
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bit_nclear(s->dirty, \
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screen_dirty_bit(s, sx, sy), \
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screen_dirty_bit(s, ex, ey)); \
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} \
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} while (0)
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/* Initialize writing with a window. */
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void
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screen_write_start(struct screen_write_ctx *ctx, struct window_pane *wp,
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struct screen *s)
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{
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u_int size;
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char tmp[16];
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const char *cp = tmp;
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ctx->wp = wp;
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if (wp != NULL && s == NULL)
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ctx->s = wp->screen;
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else
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ctx->s = s;
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size = screen_size_x(ctx->s) * screen_size_y(ctx->s);
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if (ctx->s->dirtysize != size) {
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free(ctx->s->dirty);
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ctx->s->dirty = NULL;
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ctx->s->dirtysize = size;
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}
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ctx->dirty = 0;
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ctx->cells = ctx->written = ctx->skipped = 0;
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if (wp == NULL)
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cp = "no pane";
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else
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snprintf(tmp, sizeof tmp, "pane %%%u", wp->id);
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log_debug("%s: size %ux%u, %s", __func__, screen_size_x(ctx->s),
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screen_size_y(ctx->s), cp);
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}
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/* Finish writing. */
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void
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screen_write_stop(struct screen_write_ctx *ctx)
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{
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screen_write_flush(ctx);
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log_debug("%s: %u of %u written (dirty %u, skipped %u)", __func__,
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ctx->written, ctx->cells, ctx->cells - ctx->written, ctx->skipped);
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}
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/* Flush outstanding cell writes. */
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static void
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screen_write_flush(struct screen_write_ctx *ctx)
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{
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struct screen *s = ctx->s;
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struct tty_ctx ttyctx;
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u_int x, y, offset, cx, cy, dirty;
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struct grid_cell gc;
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if (ctx->dirty == 0)
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return;
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dirty = 0;
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log_debug("%s: dirty %u", __func__, ctx->dirty);
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cx = s->cx;
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cy = s->cy;
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offset = 0;
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for (y = 0; y < screen_size_y(s); y++) {
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for (x = 0; x < screen_size_x(s); x++) {
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offset++;
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if (!bit_test(s->dirty, offset - 1))
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continue;
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bit_clear(s->dirty, offset - 1);
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screen_write_cursormove(ctx, x, y);
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grid_view_get_cell(s->grid, x, y, &gc);
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screen_write_initctx(ctx, &ttyctx);
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ttyctx.cell = &gc;
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tty_write(tty_cmd_cell, &ttyctx);
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ctx->written++;
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if (++dirty == ctx->dirty)
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break;
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}
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if (dirty == ctx->dirty)
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break;
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}
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s->cx = cx;
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s->cy = cy;
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}
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/* Reset screen state. */
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void
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screen_write_reset(struct screen_write_ctx *ctx)
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{
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struct screen *s = ctx->s;
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screen_reset_tabs(s);
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screen_write_scrollregion(ctx, 0, screen_size_y(s) - 1);
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s->mode &= ~(MODE_INSERT|MODE_KCURSOR|MODE_KKEYPAD|MODE_FOCUSON);
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s->mode &= ~(ALL_MOUSE_MODES|MODE_MOUSE_UTF8|MODE_MOUSE_SGR);
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screen_write_clearscreen(ctx, 8);
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screen_write_cursormove(ctx, 0, 0);
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}
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/* Write character. */
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void
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screen_write_putc(struct screen_write_ctx *ctx, const struct grid_cell *gcp,
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u_char ch)
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{
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struct grid_cell gc;
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memcpy(&gc, gcp, sizeof gc);
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utf8_set(&gc.data, ch);
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screen_write_cell(ctx, &gc);
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}
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/* Calculate string length, with embedded formatting. */
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size_t
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screen_write_cstrlen(const char *fmt, ...)
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{
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va_list ap;
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char *msg, *msg2, *ptr, *ptr2;
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size_t size;
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va_start(ap, fmt);
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xvasprintf(&msg, fmt, ap);
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va_end(ap);
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msg2 = xmalloc(strlen(msg) + 1);
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ptr = msg;
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ptr2 = msg2;
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while (*ptr != '\0') {
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if (ptr[0] == '#' && ptr[1] == '[') {
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while (*ptr != ']' && *ptr != '\0')
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ptr++;
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if (*ptr == ']')
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ptr++;
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continue;
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}
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*ptr2++ = *ptr++;
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}
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*ptr2 = '\0';
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size = screen_write_strlen("%s", msg2);
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free(msg);
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free(msg2);
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return (size);
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}
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/* Calculate string length. */
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size_t
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screen_write_strlen(const char *fmt, ...)
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{
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va_list ap;
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char *msg;
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struct utf8_data ud;
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u_char *ptr;
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size_t left, size = 0;
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enum utf8_state more;
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va_start(ap, fmt);
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xvasprintf(&msg, fmt, ap);
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va_end(ap);
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ptr = msg;
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while (*ptr != '\0') {
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if (*ptr > 0x7f && utf8_open(&ud, *ptr) == UTF8_MORE) {
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ptr++;
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left = strlen(ptr);
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if (left < (size_t)ud.size - 1)
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break;
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while ((more = utf8_append(&ud, *ptr)) == UTF8_MORE)
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ptr++;
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ptr++;
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if (more == UTF8_DONE)
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size += ud.width;
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} else {
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if (*ptr > 0x1f && *ptr < 0x7f)
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size++;
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ptr++;
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}
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}
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free(msg);
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return (size);
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}
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/* Write simple string (no UTF-8 or maximum length). */
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void
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screen_write_puts(struct screen_write_ctx *ctx, const struct grid_cell *gcp,
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const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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screen_write_vnputs(ctx, -1, gcp, fmt, ap);
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va_end(ap);
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}
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/* Write string with length limit (-1 for unlimited). */
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void
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screen_write_nputs(struct screen_write_ctx *ctx, ssize_t maxlen,
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const struct grid_cell *gcp, const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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screen_write_vnputs(ctx, maxlen, gcp, fmt, ap);
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va_end(ap);
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}
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void
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screen_write_vnputs(struct screen_write_ctx *ctx, ssize_t maxlen,
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const struct grid_cell *gcp, const char *fmt, va_list ap)
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{
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struct grid_cell gc;
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struct utf8_data *ud = &gc.data;
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char *msg;
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u_char *ptr;
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size_t left, size = 0;
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enum utf8_state more;
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memcpy(&gc, gcp, sizeof gc);
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xvasprintf(&msg, fmt, ap);
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ptr = msg;
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while (*ptr != '\0') {
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if (*ptr > 0x7f && utf8_open(ud, *ptr) == UTF8_MORE) {
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ptr++;
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left = strlen(ptr);
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if (left < (size_t)ud->size - 1)
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break;
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while ((more = utf8_append(ud, *ptr)) == UTF8_MORE)
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ptr++;
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ptr++;
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if (more != UTF8_DONE)
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continue;
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if (maxlen > 0 && size + ud->width > (size_t)maxlen) {
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while (size < (size_t)maxlen) {
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screen_write_putc(ctx, &gc, ' ');
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size++;
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}
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break;
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}
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size += ud->width;
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screen_write_cell(ctx, &gc);
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} else {
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if (maxlen > 0 && size + 1 > (size_t)maxlen)
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break;
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if (*ptr == '\001')
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gc.attr ^= GRID_ATTR_CHARSET;
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else if (*ptr > 0x1f && *ptr < 0x7f) {
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size++;
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screen_write_putc(ctx, &gc, *ptr);
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}
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ptr++;
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}
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}
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free(msg);
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}
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/* Write string, similar to nputs, but with embedded formatting (#[]). */
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void
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screen_write_cnputs(struct screen_write_ctx *ctx, ssize_t maxlen,
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const struct grid_cell *gcp, const char *fmt, ...)
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{
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struct grid_cell gc;
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struct utf8_data *ud = &gc.data;
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va_list ap;
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char *msg;
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u_char *ptr, *last;
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size_t left, size = 0;
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enum utf8_state more;
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memcpy(&gc, gcp, sizeof gc);
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va_start(ap, fmt);
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xvasprintf(&msg, fmt, ap);
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va_end(ap);
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ptr = msg;
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while (*ptr != '\0') {
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if (ptr[0] == '#' && ptr[1] == '[') {
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ptr += 2;
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last = ptr + strcspn(ptr, "]");
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if (*last == '\0') {
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/* No ]. Not much point in doing anything. */
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break;
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}
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*last = '\0';
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style_parse(gcp, &gc, ptr);
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ptr = last + 1;
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continue;
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}
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if (*ptr > 0x7f && utf8_open(ud, *ptr) == UTF8_MORE) {
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ptr++;
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left = strlen(ptr);
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if (left < (size_t)ud->size - 1)
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break;
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while ((more = utf8_append(ud, *ptr)) == UTF8_MORE)
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ptr++;
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ptr++;
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if (more != UTF8_DONE)
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continue;
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if (maxlen > 0 && size + ud->width > (size_t)maxlen) {
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while (size < (size_t)maxlen) {
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screen_write_putc(ctx, &gc, ' ');
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size++;
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}
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break;
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}
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size += ud->width;
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screen_write_cell(ctx, &gc);
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} else {
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if (maxlen > 0 && size + 1 > (size_t)maxlen)
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break;
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if (*ptr > 0x1f && *ptr < 0x7f) {
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size++;
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screen_write_putc(ctx, &gc, *ptr);
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}
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ptr++;
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}
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}
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free(msg);
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}
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/* Copy from another screen. */
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void
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screen_write_copy(struct screen_write_ctx *ctx, struct screen *src, u_int px,
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u_int py, u_int nx, u_int ny)
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{
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struct screen *s = ctx->s;
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struct grid *gd = src->grid;
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struct grid_cell gc;
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u_int xx, yy, cx, cy;
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cx = s->cx;
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cy = s->cy;
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for (yy = py; yy < py + ny; yy++) {
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for (xx = px; xx < px + nx; xx++) {
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grid_get_cell(gd, xx, yy, &gc);
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screen_write_cell(ctx, &gc);
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}
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cy++;
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screen_write_cursormove(ctx, cx, cy);
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}
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}
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/* Set up context for TTY command. */
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static void
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screen_write_initctx(struct screen_write_ctx *ctx, struct tty_ctx *ttyctx)
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{
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struct screen *s = ctx->s;
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ttyctx->wp = ctx->wp;
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ttyctx->ocx = s->cx;
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ttyctx->ocy = s->cy;
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ttyctx->orlower = s->rlower;
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ttyctx->orupper = s->rupper;
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}
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/* Save last cell on screen. */
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static void
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screen_write_save_last(struct screen_write_ctx *ctx, struct tty_ctx *ttyctx)
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{
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struct screen *s = ctx->s;
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struct grid *gd = s->grid;
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struct grid_cell gc;
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u_int xx;
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memcpy(&gc, &grid_default_cell, sizeof gc);
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for (xx = 1; xx <= screen_size_x(s); xx++) {
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grid_view_get_cell(gd, screen_size_x(s) - xx, s->cy, &gc);
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if (~gc.flags & GRID_FLAG_PADDING)
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break;
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}
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memcpy(&ttyctx->last_cell, &gc, sizeof ttyctx->last_cell);
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}
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/* Set a mode. */
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void
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screen_write_mode_set(struct screen_write_ctx *ctx, int mode)
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{
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struct screen *s = ctx->s;
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s->mode |= mode;
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}
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/* Clear a mode. */
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void
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screen_write_mode_clear(struct screen_write_ctx *ctx, int mode)
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{
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struct screen *s = ctx->s;
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s->mode &= ~mode;
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}
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/* Cursor up by ny. */
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void
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screen_write_cursorup(struct screen_write_ctx *ctx, u_int ny)
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{
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struct screen *s = ctx->s;
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if (ny == 0)
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ny = 1;
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if (s->cy < s->rupper) {
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/* Above region. */
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if (ny > s->cy)
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ny = s->cy;
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} else {
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/* Below region. */
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if (ny > s->cy - s->rupper)
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ny = s->cy - s->rupper;
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}
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if (s->cx == screen_size_x(s))
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s->cx--;
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if (ny == 0)
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return;
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s->cy -= ny;
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}
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/* Cursor down by ny. */
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void
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screen_write_cursordown(struct screen_write_ctx *ctx, u_int ny)
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{
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struct screen *s = ctx->s;
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if (ny == 0)
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ny = 1;
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if (s->cy > s->rlower) {
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/* Below region. */
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if (ny > screen_size_y(s) - 1 - s->cy)
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ny = screen_size_y(s) - 1 - s->cy;
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} else {
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/* Above region. */
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if (ny > s->rlower - s->cy)
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ny = s->rlower - s->cy;
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}
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if (s->cx == screen_size_x(s))
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s->cx--;
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if (ny == 0)
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return;
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s->cy += ny;
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}
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/* Cursor right by nx. */
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void
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screen_write_cursorright(struct screen_write_ctx *ctx, u_int nx)
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{
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struct screen *s = ctx->s;
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if (nx == 0)
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nx = 1;
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if (nx > screen_size_x(s) - 1 - s->cx)
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nx = screen_size_x(s) - 1 - s->cx;
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if (nx == 0)
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return;
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s->cx += nx;
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}
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|
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/* Cursor left by nx. */
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void
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screen_write_cursorleft(struct screen_write_ctx *ctx, u_int nx)
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{
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struct screen *s = ctx->s;
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if (nx == 0)
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nx = 1;
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|
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if (nx > s->cx)
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nx = s->cx;
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if (nx == 0)
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return;
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s->cx -= nx;
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}
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|
|
/* 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;
|
|
u_int sx = screen_size_x(s), sy = screen_size_y(s);
|
|
|
|
screen_write_initctx(ctx, &ttyctx);
|
|
|
|
screen_dirty_clear(s, 0, 0, sx - 1, sy - 1);
|
|
|
|
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);
|
|
}
|
|
|
|
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, 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;
|
|
|
|
screen_write_flush(ctx);
|
|
screen_write_initctx(ctx, &ttyctx);
|
|
|
|
if (s->cx <= screen_size_x(s) - 1)
|
|
grid_view_insert_cells(s->grid, s->cx, s->cy, nx, bg);
|
|
|
|
ttyctx.num = nx;
|
|
ttyctx.bg = bg;
|
|
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;
|
|
|
|
screen_write_flush(ctx);
|
|
screen_write_initctx(ctx, &ttyctx);
|
|
|
|
if (s->cx <= screen_size_x(s) - 1)
|
|
grid_view_delete_cells(s->grid, s->cx, s->cy, nx, bg);
|
|
|
|
ttyctx.num = nx;
|
|
ttyctx.bg = bg;
|
|
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);
|
|
|
|
if (s->cx <= screen_size_x(s) - 1) {
|
|
screen_dirty_clear(s, s->cx, s->cy, s->cx + nx - 1, s->cy);
|
|
grid_view_clear(s->grid, s->cx, s->cy, nx, 1, 8);
|
|
} else
|
|
return;
|
|
|
|
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 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_flush(ctx);
|
|
screen_write_initctx(ctx, &ttyctx);
|
|
|
|
grid_view_insert_lines(s->grid, s->cy, ny, bg);
|
|
|
|
ttyctx.num = ny;
|
|
ttyctx.bg = bg;
|
|
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_flush(ctx);
|
|
screen_write_initctx(ctx, &ttyctx);
|
|
|
|
if (s->cy < s->rupper || s->cy > s->rlower)
|
|
grid_view_insert_lines(s->grid, s->cy, ny, bg);
|
|
else {
|
|
grid_view_insert_lines_region(s->grid, s->rlower, s->cy, ny,
|
|
bg);
|
|
}
|
|
|
|
ttyctx.num = ny;
|
|
ttyctx.bg = bg;
|
|
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 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_flush(ctx);
|
|
screen_write_initctx(ctx, &ttyctx);
|
|
|
|
grid_view_delete_lines(s->grid, s->cy, ny, bg);
|
|
|
|
ttyctx.num = ny;
|
|
ttyctx.bg = bg;
|
|
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_flush(ctx);
|
|
screen_write_initctx(ctx, &ttyctx);
|
|
|
|
if (s->cy < s->rupper || s->cy > s->rlower)
|
|
grid_view_delete_lines(s->grid, s->cy, ny, bg);
|
|
else {
|
|
grid_view_delete_lines_region(s->grid, s->rlower, s->cy, ny,
|
|
bg);
|
|
}
|
|
|
|
ttyctx.num = ny;
|
|
ttyctx.bg = bg;
|
|
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;
|
|
struct tty_ctx ttyctx;
|
|
u_int sx = screen_size_x(s);
|
|
|
|
screen_write_initctx(ctx, &ttyctx);
|
|
ttyctx.bg = bg;
|
|
|
|
gl = &s->grid->linedata[s->grid->hsize + s->cy];
|
|
if (gl->cellsize == 0 && bg == 8)
|
|
return;
|
|
|
|
screen_dirty_clear(s, 0, s->cy, sx - 1, s->cy);
|
|
grid_view_clear(s->grid, 0, s->cy, sx, 1, bg);
|
|
|
|
tty_write(tty_cmd_clearline, &ttyctx);
|
|
}
|
|
|
|
/* 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;
|
|
struct tty_ctx ttyctx;
|
|
u_int sx = screen_size_x(s);
|
|
|
|
screen_write_initctx(ctx, &ttyctx);
|
|
ttyctx.bg = bg;
|
|
|
|
gl = &s->grid->linedata[s->grid->hsize + s->cy];
|
|
if (s->cx > sx - 1 || (s->cx >= gl->cellsize && bg == 8))
|
|
return;
|
|
|
|
screen_dirty_clear(s, s->cx, s->cy, sx - 1, s->cy);
|
|
grid_view_clear(s->grid, s->cx, s->cy, sx - s->cx, 1, bg);
|
|
|
|
tty_write(tty_cmd_clearendofline, &ttyctx);
|
|
}
|
|
|
|
/* Clear to start of line from cursor. */
|
|
void
|
|
screen_write_clearstartofline(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);
|
|
ttyctx.bg = bg;
|
|
|
|
if (s->cx > sx - 1) {
|
|
screen_dirty_clear(s, 0, s->cy, sx - 1, s->cy);
|
|
grid_view_clear(s->grid, 0, s->cy, sx, 1, bg);
|
|
} else {
|
|
screen_dirty_clear(s, 0, s->cy, s->cx, s->cy);
|
|
grid_view_clear(s->grid, 0, s->cy, s->cx + 1, 1, bg);
|
|
}
|
|
|
|
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);
|
|
|
|
if (s->cy == s->rupper) {
|
|
screen_write_flush(ctx);
|
|
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;
|
|
u_int sx = screen_size_x(s), sy = screen_size_y(s);
|
|
|
|
screen_write_initctx(ctx, &ttyctx);
|
|
|
|
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) {
|
|
screen_dirty_clear(s, 0, s->rupper, sx - 1, s->rupper);
|
|
screen_write_flush(ctx);
|
|
grid_view_scroll_region_up(s->grid, s->rupper, s->rlower);
|
|
} else if (s->cy < sy - 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, 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);
|
|
ttyctx.bg = bg;
|
|
|
|
/* Scroll into history if it is enabled and clearing entire screen. */
|
|
if (s->cx == 0 && s->cy == 0 && s->grid->flags & GRID_HISTORY) {
|
|
screen_dirty_clear(s, 0, 0, sx - 1, sy - 1);
|
|
grid_view_clear_history(s->grid, bg);
|
|
} else {
|
|
if (s->cx <= sx - 1) {
|
|
screen_dirty_clear(s, s->cx, s->cy, sx - 1, s->cy);
|
|
grid_view_clear(s->grid, s->cx, s->cy, sx - s->cx, 1,
|
|
bg);
|
|
}
|
|
screen_dirty_clear(s, 0, s->cy + 1, sx - 1, sy - 1);
|
|
grid_view_clear(s->grid, 0, s->cy + 1, sx, sy - (s->cy + 1),
|
|
bg);
|
|
}
|
|
|
|
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_size_x(s);
|
|
|
|
screen_write_initctx(ctx, &ttyctx);
|
|
|
|
if (s->cy > 0) {
|
|
screen_dirty_clear(s, 0, 0, sx - 1, s->cy);
|
|
grid_view_clear(s->grid, 0, 0, sx, s->cy, 8);
|
|
}
|
|
if (s->cx > sx - 1) {
|
|
screen_dirty_clear(s, 0, s->cy, sx - 1, s->cy);
|
|
grid_view_clear(s->grid, 0, s->cy, sx, 1, 8);
|
|
} else {
|
|
screen_dirty_clear(s, 0, s->cy, s->cx, s->cy);
|
|
grid_view_clear(s->grid, 0, s->cy, s->cx + 1, 1, 8);
|
|
}
|
|
|
|
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);
|
|
ttyctx.bg = bg;
|
|
|
|
screen_dirty_clear(s, 0, 0, sx - 1, sy - 1);
|
|
|
|
/* Scroll into history if it is enabled. */
|
|
if (s->grid->flags & GRID_HISTORY)
|
|
grid_view_clear_history(s->grid, bg);
|
|
else
|
|
grid_view_clear(s->grid, 0, 0, sx, sy, bg);
|
|
|
|
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, 8);
|
|
gd->hscrolled = 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;
|
|
u_int sx = screen_size_x(s), sy = screen_size_y(s);
|
|
struct grid_line *gl;
|
|
struct grid_cell tmp_gc, now_gc;
|
|
struct grid_cell_entry *gce;
|
|
int insert, skip, selected, wrapped = 0;
|
|
|
|
ctx->cells++;
|
|
|
|
/* Ignore padding. */
|
|
if (gc->flags & GRID_FLAG_PADDING)
|
|
return;
|
|
width = gc->data.width;
|
|
|
|
/*
|
|
* 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 > sx || (s->cx != sx && s->cx > sx - width))))
|
|
return;
|
|
|
|
/*
|
|
* If the width is zero, combine onto the previous character, if
|
|
* there is space.
|
|
*/
|
|
if (width == 0) {
|
|
if (screen_write_combine(ctx, &gc->data) == 0) {
|
|
screen_write_initctx(ctx, &ttyctx);
|
|
tty_write(tty_cmd_utf8character, &ttyctx);
|
|
}
|
|
return;
|
|
}
|
|
|
|
/* Initialise the redraw context. */
|
|
screen_write_initctx(ctx, &ttyctx);
|
|
|
|
/* If in insert mode, make space for the cells. */
|
|
if (s->mode & MODE_INSERT) {
|
|
if (s->cx <= sx - width) {
|
|
screen_write_flush(ctx);
|
|
xx = sx - s->cx - width;
|
|
grid_view_insert_cells(s->grid, s->cx, s->cy, xx, 8);
|
|
}
|
|
insert = 1;
|
|
} else
|
|
insert = 0;
|
|
skip = !insert;
|
|
|
|
/* Check this will fit on the current line and wrap if not. */
|
|
if ((s->mode & MODE_WRAP) && s->cx > sx - width) {
|
|
screen_write_flush(ctx);
|
|
screen_write_save_last(ctx, &ttyctx);
|
|
screen_write_linefeed(ctx, 1);
|
|
s->cx = 0; /* carriage return */
|
|
skip = 0;
|
|
wrapped = 1;
|
|
}
|
|
|
|
/* Sanity check cursor position. */
|
|
if (s->cx > sx - width || s->cy > sy - 1)
|
|
return;
|
|
|
|
/* Handle overwriting of UTF-8 characters. */
|
|
gl = &s->grid->linedata[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++) {
|
|
grid_view_set_cell(gd, xx, s->cy, &screen_write_pad_cell);
|
|
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 (gce->data.data != gc->data.data[0])
|
|
skip = 0;
|
|
}
|
|
}
|
|
|
|
/* Update the selection the flag and set the cell. */
|
|
selected = screen_check_selection(s, s->cx, s->cy);
|
|
if (selected && ~gc->flags & GRID_FLAG_SELECTED) {
|
|
skip = 0;
|
|
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) {
|
|
skip = 0;
|
|
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);
|
|
|
|
/*
|
|
* 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)
|
|
s->cx += width;
|
|
else
|
|
s->cx = sx - last;
|
|
|
|
/* Create space for character in insert mode. */
|
|
if (insert) {
|
|
ttyctx.num = width;
|
|
tty_write(tty_cmd_insertcharacter, &ttyctx);
|
|
}
|
|
|
|
/* Write to the screen. */
|
|
if (selected) {
|
|
screen_write_flush(ctx);
|
|
screen_select_cell(s, &tmp_gc, gc);
|
|
ttyctx.cell = &tmp_gc;
|
|
tty_write(tty_cmd_cell, &ttyctx);
|
|
ctx->written++;
|
|
} else if (!skip) {
|
|
if (wrapped) {
|
|
ttyctx.cell = gc;
|
|
tty_write(tty_cmd_cell, &ttyctx);
|
|
ctx->written++;
|
|
} else {
|
|
/*
|
|
* If wp is NULL, we are not updating the terminal and
|
|
* don't care about actually writing the cells
|
|
* (tty_write will just return). So don't even bother
|
|
* allocating the dirty array.
|
|
*/
|
|
if (ctx->wp != NULL && s->dirty == NULL) {
|
|
log_debug("%s: allocating %u bits", __func__,
|
|
s->dirtysize);
|
|
s->dirty = bit_alloc(s->dirtysize);
|
|
}
|
|
if (s->dirty != NULL) {
|
|
bit_set(s->dirty, screen_dirty_bit(s,
|
|
ttyctx.ocx, ttyctx.ocy));
|
|
ctx->dirty++;
|
|
}
|
|
}
|
|
} else
|
|
ctx->skipped++;
|
|
}
|
|
|
|
/* Combine a UTF-8 zero-width character onto the previous. */
|
|
static 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;
|
|
|
|
/* 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. */
|
|
grid_view_get_cell(gd, s->cx - 1, s->cy, &gc);
|
|
|
|
/* Check there is enough space. */
|
|
if (gc.data.size + ud->size > sizeof gc.data.data)
|
|
return (-1);
|
|
|
|
/* 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, s->cx - 1, s->cy, &gc);
|
|
|
|
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.
|
|
*/
|
|
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;
|
|
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);
|
|
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;
|
|
grid_view_set_cell(gd, xx, s->cy, &grid_default_cell);
|
|
done = 1;
|
|
}
|
|
}
|
|
|
|
return (done);
|
|
}
|
|
|
|
void
|
|
screen_write_setselection(struct screen_write_ctx *ctx, u_char *str, u_int len)
|
|
{
|
|
struct tty_ctx ttyctx;
|
|
|
|
screen_write_initctx(ctx, &ttyctx);
|
|
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);
|
|
ttyctx.ptr = str;
|
|
ttyctx.num = len;
|
|
|
|
tty_write(tty_cmd_rawstring, &ttyctx);
|
|
}
|