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wip: commandline history

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This commit is contained in:
folkert van heusden 2024-04-11 17:09:07 +02:00
parent 21558d7383
commit 75c476f200
Signed by untrusted user who does not match committer: folkert
GPG key ID: 6B6455EDFEED3BD1
2 changed files with 53 additions and 7 deletions
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57
console.cpp
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@ -177,7 +177,14 @@ std::string console::read_line(const std::string & prompt)
put_string(prompt);
put_string(">");
std::string str;
if (edit_lines_hist.empty() == false)
edit_lines_hist.erase(edit_lines_hist.begin());
while(edit_lines_hist.size() < n_edit_lines_hist)
edit_lines_hist.push_back("");
size_t line_nr = edit_lines_hist.size() - 1;
bool escape = false;
for(;;) {
auto c = wait_char(250);
@ -188,24 +195,60 @@ std::string console::read_line(const std::string & prompt)
if (c.has_value() == false)
continue;
if (c == 27) {
escape = true;
continue;
}
if (escape) {
if (c == '[')
continue;
escape = false;
for(size_t i=0; i<edit_lines_hist.at(line_nr).size(); i++)
emit_backspace();
if (c == 'A') { // up
if (line_nr > 0)
line_nr--;
else
line_nr = edit_lines_hist.size() - 1;
}
else if (c == 'B') { // down
if (line_nr < edit_lines_hist.size() - 1)
line_nr++;
else
line_nr = 0;
}
else {
continue;
}
for(size_t i=0; i<edit_lines_hist.at(line_nr).size(); i++)
put_char(edit_lines_hist.at(line_nr).at(i));
continue;
}
if (c.value() == 13 || c.value() == 10)
break;
if (c.value() == 8 || c.value() == 127) { // backspace
if (!str.empty()) {
str = str.substr(0, str.size() - 1);
if (!edit_lines_hist.at(line_nr).empty()) {
edit_lines_hist.at(line_nr) = edit_lines_hist.at(line_nr).substr(0, edit_lines_hist.at(line_nr).size() - 1);
emit_backspace();
}
}
else if (c.value() == 21) { // ^u
for(size_t i=0; i<str.size(); i++)
for(size_t i=0; i<edit_lines_hist.at(line_nr).size(); i++)
emit_backspace();
str.clear();
edit_lines_hist.at(line_nr).clear();
}
else if (c.value() >= 32) {
str += c.value();
edit_lines_hist.at(line_nr) += c.value();
put_char(c.value());
}
@ -213,7 +256,7 @@ std::string console::read_line(const std::string & prompt)
put_string_lf("");
return str;
return edit_lines_hist.at(line_nr);
}
void console::debug(const std::string fmt, ...)

3
console.h
View file

@ -47,6 +47,9 @@ protected:
uint8_t tx { 0 };
uint8_t ty { 0 };
const size_t n_edit_lines_hist { 8 }; // maximum number of previous edit-lines
std::vector<std::string> edit_lines_hist;
std::string debug_buffer;
virtual int wait_for_char_ll(const short timeout) = 0;