196200d03f
This ensures that there is no leftover line when the shell redraws the prompt, by making the prompt a simple single character prompt before rewrapping.
98 lines
3.6 KiB
C
98 lines
3.6 KiB
C
/*
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* rewrap.h
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* Copyright (C) 2016 Kovid Goyal <kovid at kovidgoyal.net>
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*
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* Distributed under terms of the GPL3 license.
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*/
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#pragma once
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#ifndef BufType
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#define BufType LineBuf
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#endif
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#ifndef init_src_line
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#define init_src_line(src_y) init_line(src, src->line, src->line_map[src_y]);
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#endif
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#ifndef init_dest_line
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#define init_dest_line(dest_y) init_line(dest, dest->line, dest->line_map[dest_y]); copy_line_attrs_to_line(dest->line_attrs[dest_y], dest->line);
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#endif
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#define set_dest_line_attrs(dest_y, continued) dest->line_attrs[dest_y] = (continued ? CONTINUED_MASK : 0) | line_attrs_from_line(src->line);
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#ifndef first_dest_line
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#define first_dest_line init_dest_line(0); set_dest_line_attrs(0, false)
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#endif
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#ifndef next_dest_line
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#define next_dest_line(continued) \
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if (dest_y >= dest->ynum - 1) { \
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linebuf_index(dest, 0, dest->ynum - 1); \
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if (historybuf != NULL) { \
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init_dest_line(dest->ynum - 1); \
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dest->line->has_dirty_text = true; \
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historybuf_add_line(historybuf, dest->line, as_ansi_buf); \
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}\
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linebuf_clear_line(dest, dest->ynum - 1, true); \
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} else dest_y++; \
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init_dest_line(dest_y); \
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set_dest_line_attrs(dest_y, continued);
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#endif
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#ifndef is_src_line_continued
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#define is_src_line_continued(src_y) (src_y < src->ynum - 1 ? (src->line_attrs[src_y + 1] & CONTINUED_MASK) : false)
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#endif
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static inline void
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copy_range(Line *src, index_type src_at, Line* dest, index_type dest_at, index_type num) {
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memcpy(dest->cpu_cells + dest_at, src->cpu_cells + src_at, num * sizeof(CPUCell));
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memcpy(dest->gpu_cells + dest_at, src->gpu_cells + src_at, num * sizeof(GPUCell));
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}
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typedef struct TrackCursor {
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index_type x, y;
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bool is_tracked_line, is_sentinel;
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} TrackCursor;
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static void
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rewrap_inner(BufType *src, BufType *dest, const index_type src_limit, HistoryBuf UNUSED *historybuf, TrackCursor *track, ANSIBuf *as_ansi_buf) {
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bool src_line_is_continued = false, is_first_line = true;
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index_type src_y = 0, src_x = 0, dest_x = 0, dest_y = 0, num = 0, src_x_limit = 0;
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TrackCursor tc_end = {.is_sentinel = true };
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if (!track) track = &tc_end;
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do {
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for (TrackCursor *t = track; !t->is_sentinel; t++) t->is_tracked_line = src_y == t->y;
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init_src_line(src_y);
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src_line_is_continued = is_src_line_continued(src_y);
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src_x_limit = src->xnum;
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if (!src_line_is_continued) {
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// Trim trailing blanks since there is a hard line break at the end of this line
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while(src_x_limit && (src->line->cpu_cells[src_x_limit - 1].ch) == BLANK_CHAR) src_x_limit--;
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}
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for (TrackCursor *t = track; !t->is_sentinel; t++) {
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if (t->is_tracked_line && t->x >= src_x_limit) t->x = MAX(1u, src_x_limit) - 1;
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}
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if (is_first_line) {
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first_dest_line; is_first_line = false;
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}
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while (src_x < src_x_limit) {
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if (dest_x >= dest->xnum) { next_dest_line(true); dest_x = 0; }
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num = MIN(src->line->xnum - src_x, dest->xnum - dest_x);
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copy_range(src->line, src_x, dest->line, dest_x, num);
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for (TrackCursor *t = track; !t->is_sentinel; t++) {
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if (t->is_tracked_line && src_x <= t->x && t->x < src_x + num) {
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t->y = dest_y;
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t->x = dest_x + (t->x - src_x + 1);
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}
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}
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src_x += num; dest_x += num;
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}
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src_y++; src_x = 0;
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if (!src_line_is_continued && src_y < src_limit) { init_src_line(src_y); next_dest_line(false); dest_x = 0; }
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} while (src_y < src_limit);
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dest->line->ynum = dest_y;
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}
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