forked from WHC/Hermit
WHC
1c26cc6e30
- Drag, double-click (word) and triple-click (line) selection in the log, auto-scroll at the edges, soft-wrapped lines joined on copy. - sashidown ANSI renderer: delimiter runs with flanking rules, so intraword underscores (test_apply_patch.c) stay literal; unmatched * _ and backticks are shown as-is; * and _ do not close each other. - tests: test_textsel, test_markdown.
42 lines
1.7 KiB
C
42 lines
1.7 KiB
C
#ifndef CST_TEXTSEL_H
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#define CST_TEXTSEL_H
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#include <stddef.h>
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#include <wchar.h>
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/* UTF-8 / ANSI helpers shared by the TUI renderer and mouse selection, so both
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* agree on which character occupies each column. */
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int cst_utf8_decode(const char *s, size_t avail, wchar_t *wc, size_t *eaten);
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/* wcwidth(), with an East-Asian / ASCII heuristic on Windows. */
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int cst_wcwidth(wchar_t wc);
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/* Columns of wc; 1 for non-printing characters. */
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int cst_utf8_width(wchar_t wc);
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/* Length of the escape sequence at s (CSI or two-byte ESC), 0 if none. */
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size_t cst_ansi_skip(const char *s, size_t n);
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typedef struct {
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char *s; /* NUL-terminated once anything was appended */
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size_t n, cap;
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} cst_selbuf_t;
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void cst_selbuf_free(cst_selbuf_t *b);
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int cst_selbuf_putc(cst_selbuf_t *b, char c);
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/* Appends the text drawn in columns [c1, c2] of a row whose content `line`
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* (ANSI escapes allowed) starts at column `indent`; c2 < 0 means the end of
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* the row. A wide character is taken whole when either of its cells is in
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* range. With `trim`, trailing spaces of the appended part are dropped.
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* Returns 0, or -1 when out of memory. */
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int cst_textsel_append(cst_selbuf_t *b, const char *line, int indent, int c1,
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int c2, int trim);
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/* Column span [*c1, *c2] of the word under column `col`; just that cell (or
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* both cells of a wide character) when it is not on a word character. */
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void cst_textsel_word(const char *line, int indent, int col, int *c1, int *c2);
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/* Widens [*c1, *c2] so that neither end splits a wide character; highlighting
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* half of one desynchronizes curses from the terminal. *c2 < 0 is left as is. */
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void cst_textsel_snap(const char *line, int indent, int *c1, int *c2);
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#endif
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