RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-26 15:27:34 +00:00
Code Issues Activity Actions

LibVT+Kernel: Add support for setting cursor styles

Browse source 
This commit introduces support for 3 new escape sequences:
1. Stop blinking cursor mode
2. `DECTCEM` mode (enable/disable cursor)
3. `DECSCUSR` (set cursor style)

`TerminalWidget` now supports the following cursor types: block,
underline and vertical bar. Each of these can blink or be steady.
`VirtualConsole` ignores these (just as we were doing before).
This commit is contained in:
Daniel Bertalan 2021-05-24 09:36:41 +02:00 • committed by Andreas Kling
parent 7dfc804d7d
commit 875a2cbb71
6 changed files with 162 additions and 14 deletions
Download patch file Download diff file Expand all files Collapse all files

93
Userland/Libraries/LibVT/Terminal.cpp
View file

@ -46,24 +46,64 @@ void Terminal::clear_including_history()
void Terminal::alter_mode(bool should_set, Parameters params, Intermediates intermediates)
{
auto steady_cursor_to_blinking = [](CursorStyle style) {
switch (style) {
case SteadyBar:
return BlinkingBar;
case SteadyBlock:
return BlinkingBlock;
case SteadyUnderline:
return BlinkingUnderline;
default:
return style;
}
};
auto blinking_cursor_to_steady = [](CursorStyle style) {
switch (style) {
case BlinkingBar:
return SteadyBar;
case BlinkingBlock:
return SteadyBlock;
case BlinkingUnderline:
return SteadyUnderline;
default:
return style;
}
};
if (intermediates.size() > 0 && intermediates[0] == '?') {
for (auto mode : params) {
switch (mode) {
case 3: {
// 80/132-column mode (DECCOLM)
unsigned new_columns = should_set ? 80 : 132;
unsigned new_columns = should_set ? 132 : 80;
dbgln_if(TERMINAL_DEBUG, "Setting {}-column mode", new_columns);
set_size(new_columns, rows());
clear();
break;
}
case 12:
if (should_set) {
// Start blinking cursor
m_cursor_style = steady_cursor_to_blinking(m_cursor_style);
} else {
// Stop blinking cursor
m_cursor_style = blinking_cursor_to_steady(m_cursor_style);
}
m_client.set_cursor_style(m_cursor_style);
break;
case 25:
// Hide cursor command, but doesn't need to be run (for now, because
// we don't do inverse control codes anyways)
if (should_set)
dbgln("Terminal: Hide Cursor escapecode received. Not needed: ignored.");
else
dbgln("Terminal: Show Cursor escapecode received. Not needed: ignored.");
if (should_set) {
// Show cursor
m_cursor_style = m_saved_cursor_style;
m_client.set_cursor_style(m_cursor_style);
} else {
// Hide cursor
m_saved_cursor_style = m_cursor_style;
m_cursor_style = None;
m_client.set_cursor_style(None);
}
break;
default:
dbgln("Terminal::alter_mode: Unimplemented private mode {} (should_set={})", mode, should_set);
@ -84,12 +124,12 @@ void Terminal::alter_mode(bool should_set, Parameters params, Intermediates inte
void Terminal::RM(Parameters params, Intermediates intermediates)
{
alter_mode(true, params, intermediates);
alter_mode(false, params, intermediates);
}
void Terminal::SM(Parameters params, Intermediates intermediates)
{
alter_mode(false, params, intermediates);
alter_mode(true, params, intermediates);
}
void Terminal::SGR(Parameters params)
@ -454,6 +494,35 @@ void Terminal::SD(Parameters params)
scroll_down();
}
void Terminal::DECSCUSR(Parameters params)
{
unsigned style = 1;
if (params.size() >= 1 && params[0] != 0)
style = params[0];
switch (style) {
case 1:
m_client.set_cursor_style(BlinkingBlock);
break;
case 2:
m_client.set_cursor_style(SteadyBlock);
break;
case 3:
m_client.set_cursor_style(BlinkingUnderline);
break;
case 4:
m_client.set_cursor_style(SteadyUnderline);
break;
case 5:
m_client.set_cursor_style(BlinkingBar);
break;
case 6:
m_client.set_cursor_style(SteadyBar);
break;
default:
dbgln("Unknown cursor style {}", style);
}
}
#ifndef KERNEL
void Terminal::IL(Parameters params)
{
@ -833,6 +902,12 @@ void Terminal::execute_csi_sequence(Parameters parameters, Intermediates interme
case 'n':
DSR(parameters);
break;
case 'q':
if (intermediates.size() >= 1 && intermediates[0] == ' ')
DECSCUSR(parameters);
else
unimplemented_csi_sequence(parameters, intermediates, last_byte);
break;
default:
unimplemented_csi_sequence(parameters, intermediates, last_byte);
}