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string: Make pad pad to terminal width

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This just changes it so it subtracts escape sequences, according to
the current terminal.
This commit is contained in:
Fabian Homborg 2021-07-01 19:36:21 +02:00
parent 7ad855a844
commit a4756ce561
1 changed files with 29 additions and 2 deletions
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31
src/builtin_string.cpp
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@ -31,6 +31,7 @@
#include "parse_util.h"
#include "parser.h"
#include "pcre2.h"
#include "screen.h"
#include "wcstringutil.h"
#include "wgetopt.h"
#include "wildcard.h"
@ -198,6 +199,32 @@ struct options_t { //!OCLINT(too many fields)
escape_string_style_t escape_style = STRING_STYLE_SCRIPT;
};
static size_t width_without_escapes(wcstring ins) {
ssize_t width = 0;
// TODO: this is the same as fish_wcwidth_min_0 from screen.cpp
// Make that reusable (and add a wcswidth version).
for (auto c : ins) {
auto w = fish_wcwidth(c);
if (w > 0) width += w;
}
// Go to all escape characters, measure escape sequence,
// subtract its min-0-width.
size_t pos = 0;
while ((pos = ins.find('\x1B', pos)) != std::string::npos) {
auto len = escape_code_length(ins.c_str() + pos);
if (len) {
auto sub = ins.substr(pos, *len);
for (auto c : sub) {
auto w = fish_wcwidth(c);
if (w > 0) width -= w;
}
}
pos++;
}
return width;
}
/// This handles the `--style=xxx` flag.
static int handle_flag_1(const wchar_t **argv, parser_t &parser, io_streams_t &streams,
const wgetopter_t &w, options_t *opts) {
@ -1227,7 +1254,7 @@ static int string_pad(parser_t &parser, io_streams_t &streams, int argc, const w
arg_iterator_t aiter_width(argv, optind, streams);
while (const wcstring *arg = aiter_width.nextstr()) {
wcstring input_string = *arg;
ssize_t width = fish_wcswidth(input_string);
ssize_t width = width_without_escapes(input_string);
if (width > max_width) max_width = width;
inputs.push_back(std::move(input_string));
}
@ -1235,7 +1262,7 @@ static int string_pad(parser_t &parser, io_streams_t &streams, int argc, const w
ssize_t pad_width = max_width > opts.width ? max_width : opts.width;
for (auto &input : inputs) {
wcstring padded;
ssize_t padded_width = fish_wcswidth(input);
ssize_t padded_width = width_without_escapes(input);
if (pad_width >= padded_width) {
ssize_t pad = (pad_width - padded_width) / pad_char_width;
ssize_t remaining_width = (pad_width - padded_width) % pad_char_width;