Lots of updates:
1. Scrolling and click to set the cursor works. 2. GUI now uses Brass Mono as the font. 3. A lot of stability and other updates.
This commit is contained in:
198
TerminalInputHandler.cc
Normal file
198
TerminalInputHandler.cc
Normal file
@@ -0,0 +1,198 @@
|
||||
#include <ncurses.h>
|
||||
#include <cstdio>
|
||||
|
||||
#include "KKeymap.h"
|
||||
#include "TerminalInputHandler.h"
|
||||
|
||||
namespace {
|
||||
constexpr int
|
||||
CTRL(char c)
|
||||
{
|
||||
return c & 0x1F;
|
||||
}
|
||||
}
|
||||
|
||||
TerminalInputHandler::TerminalInputHandler() = default;
|
||||
|
||||
TerminalInputHandler::~TerminalInputHandler() = default;
|
||||
|
||||
|
||||
static bool
|
||||
map_key_to_command(const int ch, bool &k_prefix, bool &esc_meta, MappedInput &out)
|
||||
{
|
||||
// Handle special keys from ncurses
|
||||
switch (ch) {
|
||||
case KEY_MOUSE: {
|
||||
MEVENT ev{};
|
||||
if (getmouse(&ev) == OK) {
|
||||
// React to left button click/press
|
||||
if (ev.bstate & (BUTTON1_CLICKED | BUTTON1_PRESSED | BUTTON1_RELEASED)) {
|
||||
char buf[64];
|
||||
// Use screen coordinates; command handler will translate via offsets
|
||||
std::snprintf(buf, sizeof(buf), "@%d:%d", ev.y, ev.x);
|
||||
out = {true, CommandId::MoveCursorTo, std::string(buf), 0};
|
||||
return true;
|
||||
}
|
||||
}
|
||||
// No actionable mouse event
|
||||
out.hasCommand = false;
|
||||
return true;
|
||||
}
|
||||
case KEY_LEFT:
|
||||
out = {true, CommandId::MoveLeft, "", 0};
|
||||
return true;
|
||||
case KEY_RIGHT:
|
||||
out = {true, CommandId::MoveRight, "", 0};
|
||||
return true;
|
||||
case KEY_UP:
|
||||
out = {true, CommandId::MoveUp, "", 0};
|
||||
return true;
|
||||
case KEY_DOWN:
|
||||
out = {true, CommandId::MoveDown, "", 0};
|
||||
return true;
|
||||
case KEY_HOME:
|
||||
out = {true, CommandId::MoveHome, "", 0};
|
||||
return true;
|
||||
case KEY_END:
|
||||
out = {true, CommandId::MoveEnd, "", 0};
|
||||
return true;
|
||||
case KEY_PPAGE:
|
||||
out = {true, CommandId::PageUp, "", 0};
|
||||
return true;
|
||||
case KEY_NPAGE:
|
||||
out = {true, CommandId::PageDown, "", 0};
|
||||
return true;
|
||||
case KEY_DC:
|
||||
out = {true, CommandId::DeleteChar, "", 0};
|
||||
return true;
|
||||
case KEY_RESIZE:
|
||||
out = {true, CommandId::Refresh, "", 0};
|
||||
return true;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
|
||||
// ESC as cancel of prefix; many terminals send meta sequences as ESC+...
|
||||
if (ch == 27) {
|
||||
// ESC
|
||||
k_prefix = false;
|
||||
esc_meta = true; // next key will be considered meta-modified
|
||||
out.hasCommand = false; // no command yet
|
||||
return true;
|
||||
}
|
||||
|
||||
// Control keys
|
||||
if (ch == CTRL('K')) {
|
||||
// C-k prefix
|
||||
k_prefix = true;
|
||||
out = {true, CommandId::KPrefix, "", 0};
|
||||
return true;
|
||||
}
|
||||
if (ch == CTRL('G')) {
|
||||
// cancel
|
||||
k_prefix = false;
|
||||
esc_meta = false;
|
||||
out = {true, CommandId::Refresh, "", 0};
|
||||
return true;
|
||||
}
|
||||
if (ch == CTRL('L')) {
|
||||
out = {true, CommandId::Refresh, "", 0};
|
||||
return true;
|
||||
}
|
||||
if (ch == CTRL('S')) {
|
||||
out = {true, CommandId::FindStart, "", 0};
|
||||
return true;
|
||||
}
|
||||
if (ch == CTRL('A')) {
|
||||
out = {true, CommandId::MoveHome, "", 0};
|
||||
return true;
|
||||
}
|
||||
if (ch == CTRL('E')) {
|
||||
out = {true, CommandId::MoveEnd, "", 0};
|
||||
return true;
|
||||
}
|
||||
|
||||
// Enter
|
||||
if (ch == '\n' || ch == '\r') {
|
||||
k_prefix = false;
|
||||
out = {true, CommandId::Newline, "", 0};
|
||||
return true;
|
||||
}
|
||||
// Backspace in ncurses can be KEY_BACKSPACE or 127
|
||||
if (ch == KEY_BACKSPACE || ch == 127 || ch == CTRL('H')) {
|
||||
k_prefix = false;
|
||||
out = {true, CommandId::Backspace, "", 0};
|
||||
return true;
|
||||
}
|
||||
|
||||
// If previous key was ESC, interpret as meta
|
||||
if (esc_meta) {
|
||||
esc_meta = false;
|
||||
int ascii_key = ch;
|
||||
if (ascii_key >= 'A' && ascii_key <= 'Z')
|
||||
ascii_key = ascii_key - 'A' + 'a';
|
||||
if (ascii_key == 'b') {
|
||||
out = {true, CommandId::WordPrev, "", 0};
|
||||
return true;
|
||||
}
|
||||
if (ascii_key == 'f') {
|
||||
out = {true, CommandId::WordNext, "", 0};
|
||||
return true;
|
||||
}
|
||||
// Unhandled meta key: no command
|
||||
out.hasCommand = false;
|
||||
return true;
|
||||
}
|
||||
|
||||
if (k_prefix) {
|
||||
k_prefix = false; // single next key only
|
||||
// Determine if this is a control chord (e.g., C-x) and normalize
|
||||
bool ctrl = false;
|
||||
int ascii_key = ch;
|
||||
if (ch >= 1 && ch <= 26) {
|
||||
ctrl = true;
|
||||
ascii_key = 'a' + (ch - 1);
|
||||
}
|
||||
// For letters, normalize to lowercase ASCII
|
||||
ascii_key = KLowerAscii(ascii_key);
|
||||
|
||||
CommandId id;
|
||||
if (KLookupKCommand(ascii_key, ctrl, id)) {
|
||||
out = {true, id, "", 0};
|
||||
} else {
|
||||
out.hasCommand = false; // unknown chord after C-k
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
// Printable ASCII
|
||||
if (ch >= 0x20 && ch <= 0x7E) {
|
||||
out.hasCommand = true;
|
||||
out.id = CommandId::InsertText;
|
||||
out.arg.assign(1, static_cast<char>(ch));
|
||||
out.count = 0;
|
||||
return true;
|
||||
}
|
||||
|
||||
out.hasCommand = false;
|
||||
return true; // consumed a key
|
||||
}
|
||||
|
||||
|
||||
bool
|
||||
TerminalInputHandler::decode_(MappedInput &out)
|
||||
{
|
||||
int ch = getch();
|
||||
if (ch == ERR) {
|
||||
return false; // no input
|
||||
}
|
||||
return map_key_to_command(ch, k_prefix_, esc_meta_, out);
|
||||
}
|
||||
|
||||
|
||||
bool
|
||||
TerminalInputHandler::Poll(MappedInput &out)
|
||||
{
|
||||
out = {};
|
||||
return decode_(out) && out.hasCommand;
|
||||
}
|
||||
Reference in New Issue
Block a user