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linewrap in help

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This commit is contained in:
Christian Hohnstaedt 2020-02-18 06:37:01 +01:00
parent 113a201d39
commit c1ea126efe
1 changed files with 30 additions and 1 deletions
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31
lib/arguments.cpp
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@ -6,6 +6,9 @@
*/
#include <getopt.h>
#include <sys/ioctl.h>
#include <stdio.h>
#include "arguments.h"
#include <QList>
@ -58,10 +61,34 @@ void arg_option::fillOption(struct option *opt) const
opt->val = 0;
}
static QString splitQstring(int offset, int width, const QString &text)
{
QStringList lines;
QString line;
foreach(const QString &word, text.split(" ")) {
if (line.size() + word.size() < width - offset) {
line += " " + word;
continue;
}
lines += line;
line.clear();
}
lines += line;
return lines.join(QString("\n") +QString().fill(' ', offset));
}
QString arguments::help()
{
QString s;
size_t len = 0;
int width = 80, offset;
struct winsize w;
ioctl(0, TIOCGWINSZ, &w);
if (w.ws_col > 20)
width = w.ws_col;
foreach(const arg_option &a, opts) {
size_t l = strlen(a.long_opt) + 1;
if (a.arg)
@ -69,11 +96,13 @@ QString arguments::help()
if (l > len)
len = l;
}
offset = len + 5;
for (auto i = opts.begin(); i != opts.end(); ++i) {
QString longopt = i->long_opt;
if (i->arg)
longopt += QString("=%1").arg(i->arg);
s += QString(" --%1 %2\n").arg(longopt, len*-1).arg(i->help);
QString help = splitQstring(offset, width, i->help);
s += QString(" --%1 %2\n").arg(longopt, len*-1).arg(help);
}
return s;
}