80 lines
2.8 KiB
C
80 lines
2.8 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]);
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#endif
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#ifndef first_dest_line
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#define first_dest_line init_dest_line(0)
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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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linebuf_init_line(dest, dest->ynum - 1); \
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historybuf_add_line(historybuf, dest->line); \
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}\
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linebuf_clear_line(dest, dest->ynum - 1); \
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} else dest_y++; \
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init_dest_line(dest_y); \
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dest->continued_map[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->continued_map[src_y + 1] : false)
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#endif
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static inline void copy_range(Line *src, index_type src_at, Line* dest, index_type dest_at, index_type num) {
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memcpy(dest->chars + dest_at, src->chars + src_at, num * sizeof(char_type));
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memcpy(dest->fg_colors + dest_at, src->fg_colors + src_at, num * sizeof(color_type));
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memcpy(dest->bg_colors + dest_at, src->bg_colors + src_at, num * sizeof(color_type));
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memcpy(dest->decoration_fg + dest_at, src->decoration_fg + src_at, num * sizeof(color_type));
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memcpy(dest->combining_chars + dest_at, src->combining_chars + src_at, num * sizeof(combining_type));
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}
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static void rewrap_inner(BufType *src, BufType *dest, const index_type src_limit, HistoryBuf UNUSED *historybuf) {
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bool src_line_is_continued = false;
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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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Py_BEGIN_ALLOW_THREADS;
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first_dest_line;
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do {
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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 white-space since there is a hard line break at the end of this line
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while(src_x_limit && (src->line->chars[src_x_limit - 1] & CHAR_MASK) == 32) src_x_limit--;
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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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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) { 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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Py_END_ALLOW_THREADS;
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}
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