From d7626cd9d766bdffb3f1dc729933a98c77379da2 Mon Sep 17 00:00:00 2001 From: Nicholas Marriott Date: Mon, 12 Oct 2009 17:19:47 +0000 Subject: [PATCH] When drawing lines that have wrapped naturally, don't force a newline but permit them to wrap naturally again. This allows terminals that use this to guess where lines start and end for eg mouse selecting (like xterm) to work correctly. This was another long-standing issue raised by several people over the last while. Thanks to martynas@ for much testing. This was not trivial to get right so bringing it in for wider testing and adn to fix any further glitches in-tree. --- screen-write.c | 34 ++++++++++++++++++++++++++------- tmux.h | 1 + tty.c | 51 +++++++++++++++++++++++++++++++++++++++++++++----- 3 files changed, 74 insertions(+), 12 deletions(-) diff --git a/screen-write.c b/screen-write.c index 2ce98dee..bcaabc14 100644 --- a/screen-write.c +++ b/screen-write.c @@ -833,15 +833,15 @@ screen_write_mousemode(struct screen_write_ctx *ctx, int state) s->mode &= ~MODE_MOUSE; } -/* Line feed (down with scroll). */ +/* + * Line feed the screen only (don't update the tty). Used for printing single + * characters, where might want to let the scroll happen naturally. + */ void -screen_write_linefeed(struct screen_write_ctx *ctx, int wrapped) +screen_write_linefeedscreen(struct screen_write_ctx *ctx, int wrapped) { struct screen *s = ctx->s; struct grid_line *gl; - struct tty_ctx ttyctx; - - screen_write_initctx(ctx, &ttyctx); gl = &s->grid->linedata[s->grid->hsize + s->cy]; if (wrapped) @@ -853,6 +853,17 @@ screen_write_linefeed(struct screen_write_ctx *ctx, int wrapped) grid_view_scroll_region_up(s->grid, s->rupper, s->rlower); else if (s->cy < screen_size_y(s) - 1) s->cy++; +} + +/* Line feed (down with scroll). */ +void +screen_write_linefeed(struct screen_write_ctx *ctx, int wrapped) +{ + struct tty_ctx ttyctx; + + screen_write_initctx(ctx, &ttyctx); + + screen_write_linefeedscreen(ctx, wrapped); tty_write(tty_cmd_linefeed, &ttyctx); } @@ -952,6 +963,7 @@ screen_write_cell( struct screen_write_ctx *ctx, const struct grid_cell *gc, u_char *udata) { struct screen *s = ctx->s; + struct window_pane *wp = ctx->wp; struct grid *gd = s->grid; struct tty_ctx ttyctx; struct grid_utf8 gu, *tmp_gu; @@ -1016,8 +1028,16 @@ screen_write_cell( /* Check this will fit on the current line and wrap if not. */ if (s->cx > screen_size_x(s) - width) { - screen_write_carriagereturn(ctx); - screen_write_linefeed(ctx, 1); + /* + * Don't update the terminal now, just update the screen and + * leave the cursor to scroll naturally, unless this is only + * part of the screen width. + */ + if (wp->xoff != 0 || wp->sx != screen_size_x(s)) + screen_write_linefeed(ctx, 1); + else + screen_write_linefeedscreen(ctx, 1); + s->cx = 0; /* carriage return */ } /* Sanity checks. */ diff --git a/tmux.h b/tmux.h index 2d25c1de..1fe67a5b 100644 --- a/tmux.h +++ b/tmux.h @@ -1666,6 +1666,7 @@ void screen_write_scrollregion(struct screen_write_ctx *, u_int, u_int); void screen_write_insertmode(struct screen_write_ctx *, int); void screen_write_mousemode(struct screen_write_ctx *, int); void screen_write_linefeed(struct screen_write_ctx *, int); +void screen_write_linefeedscreen(struct screen_write_ctx *, int); void screen_write_carriagereturn(struct screen_write_ctx *); void screen_write_kcursormode(struct screen_write_ctx *, int); void screen_write_kkeypadmode(struct screen_write_ctx *, int); diff --git a/tty.c b/tty.c index 53e017bc..866ee93c 100644 --- a/tty.c +++ b/tty.c @@ -327,9 +327,10 @@ tty_putc(struct tty *tty, u_char ch) if (tty->term->flags & TERM_EARLYWRAP) sx--; - if (tty->cx == sx) { - tty->cx = 0; - tty->cy++; + if (tty->cx >= sx) { + tty->cx = 1; + if (tty->cy != tty->rlower) + tty->cy++; } else tty->cx++; } @@ -440,6 +441,7 @@ void tty_draw_line(struct tty *tty, struct screen *s, u_int py, u_int ox, u_int oy) { const struct grid_cell *gc; + struct grid_line *gl; struct grid_cell tmpgc; const struct grid_utf8 *gu; u_int i, sx; @@ -452,7 +454,17 @@ tty_draw_line(struct tty *tty, struct screen *s, u_int py, u_int ox, u_int oy) if (sx > tty->sx) sx = tty->sx; - tty_cursor(tty, ox, oy + py); + /* + * Don't move the cursor to the start permission if it will wrap there + * itself; much the same as the conditions in tty_cmd_cell. + */ + gl = NULL; + if (py != 0) + gl = &s->grid->linedata[s->grid->hsize + py - 1]; + if (ox != 0 || (gl != NULL && !(gl->flags & GRID_LINE_WRAPPED)) || + tty->cy != oy + py - 1 || tty->cx < tty->sx) + tty_cursor(tty, ox, oy + py); + for (i = 0; i < sx; i++) { gc = grid_view_peek_cell(s->grid, i, py); @@ -827,7 +839,36 @@ tty_cmd_alignmenttest(struct tty *tty, const struct tty_ctx *ctx) void tty_cmd_cell(struct tty *tty, const struct tty_ctx *ctx) { - tty_cursor_pane(tty, ctx, ctx->ocx, ctx->ocy); + struct window_pane *wp = ctx->wp; + struct screen *s = wp->screen; + struct grid_line *gl; + u_int wx, wy; + + tty_region_pane(tty, ctx, ctx->orupper, ctx->orlower); + + wx = ctx->ocx + wp->xoff; + wy = ctx->ocy + wp->yoff; + + /* + * If: + * + * - the line was wrapped: + * - the cursor is beyond the edge of the screen, + * - the desired position is at the left, + * - and either a) the desired next line is the one below the current + * or b) the current line is the bottom of the scroll region, + * + * Then just printing the next character will be enough to scroll into + * place, so don't do an explicit cursor move. + */ + gl = NULL; + if (ctx->ocy != 0) + gl = &s->grid->linedata[s->grid->hsize + ctx->ocy - 1]; + if (wy == 0 || (gl != NULL && !(gl->flags & GRID_LINE_WRAPPED)) || + tty->cx < tty->sx || /* not at edge of screen */ + wx != 0 || /* don't want 0 next */ + (wy != tty->cy + 1 && tty->cy != ctx->orlower + wp->yoff)) + tty_cursor_pane(tty, ctx, ctx->ocx, ctx->ocy); tty_cell(tty, ctx->cell, ctx->utf8); }