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Commit 86db4e0c authored by Martin Hostettler's avatar Martin Hostettler Committed by Tomaz Canabrava
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Start separating CSI parsing from parsing of other sequences. 

The escape sequence parser in Vt102Emulation is fuzzy in classifying sequences.
The commit move it a bit nearer to parsing according to the widely accepted
terminal sequence structure by restricting CSI (from ecma-48) parsing rules
from rules applicable to non CSI sequences and common parsing rules.

This tightens up parsing of non CSI sequences. Sequences like ESC % = now
no longer are misinterpreted as unfinished but as complete sequence which
matches how other terminals tokenize and also matches the emca-35 syntax.

This is done by moving most of the parsing rules to branches of an
if-statement conditional on the first 2 characters in tokenBuffer.
parent 0633ac93
Pipeline #128535 passed with stage
in 2 minutes and 3 seconds
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Inline Side-by-side
src/Vt102Emulation.cpp
View file @ 86db4e0c
......@@ -441,54 +441,58 @@ void Vt102Emulation::receiveChars(const QVector<uint> &chars)
/* clang-format off */
// <ESC> ']' ...
if (osc ) { continue; }
if (lec(3,2,'?')) { continue; }
if (lec(3,2,'=')) { continue; }
if (lec(3,2,'>')) { continue; }
if (lec(3,2,'!')) { continue; }
if (lec(3,2,SP )) { continue; }
if (lec(4,3,SP )) { continue; }
if (dcs ) { continue; /* TODO We don't xterm DCS, so we just eat it */ }
if (lec(2,0,ESC)) { processToken(token_esc(s[1]), 0, 0); resetTokenizer(); continue; }
if (les(3,1,SCS)) { processToken(token_esc_cs(s[1],s[2]), 0, 0); resetTokenizer(); continue; }
if (lec(3,1,'#')) { processToken(token_esc_de(s[2]), 0, 0); resetTokenizer(); continue; }
if (eps( CPN)) { processToken(token_csi_pn(cc), argv[0],argv[1]); resetTokenizer(); continue; }
// resize = \e[8;<row>;<col>t
if (eps(CPS)) {
processToken(token_csi_ps(cc, argv[0]), argv[1], argv[2]);
resetTokenizer();
continue;
}
if (epe( )) { processToken(token_csi_pe(cc), 0, 0); resetTokenizer(); continue; }
if (esp ( )) { processToken(token_csi_sp(cc), 0, 0); resetTokenizer(); continue; }
if (epsp( )) { processToken(token_csi_psp(cc, argv[0]), 0, 0); resetTokenizer(); continue; }
if (ees(DIG)) { addDigit(cc-'0'); continue; }
if (eec(';')) { addArgument(); continue; }
if (ees(INT)) { continue; }
if (p >= 3 && cc == 'y' && s[p - 2] == '*') { processChecksumRequest(argc, argv); resetTokenizer(); continue; }
for (int i = 0; i <= argc; i++) {
if (epp()) {
processToken(token_csi_pr(cc,argv[i]), 0, 0);
} else if (eeq()) {
processToken(token_csi_pq(cc), 0, 0); // spec. case for ESC[=0c or ESC[=c
} else if (egt()) {
processToken(token_csi_pg(cc), 0, 0); // spec. case for ESC[>0c or ESC[>c
} else if (cc == 'm' && argc - i >= 4 && (argv[i] == 38 || argv[i] == 48) && argv[i+1] == 2)
{
// ESC[ ... 48;2;<red>;<green>;<blue> ... m -or- ESC[ ... 38;2;<red>;<green>;<blue> ... m
i += 2;
processToken(token_csi_ps(cc, argv[i-2]), COLOR_SPACE_RGB, (argv[i] << 16) | (argv[i+1] << 8) | argv[i+2]);
i += 2;
} else if (cc == 'm' && argc - i >= 2 && (argv[i] == 38 || argv[i] == 48) && argv[i+1] == 5) {
// ESC[ ... 48;5;<index> ... m -or- ESC[ ... 38;5;<index> ... m
i += 2;
processToken(token_csi_ps(cc, argv[i-2]), COLOR_SPACE_256, argv[i]);
} else if (p < 2 || (charClass[s[p-2]] & (INT)) != (INT)) {
processToken(token_csi_ps(cc,argv[i]), 0, 0);
if (p >= 3 && s[1] == '[') { // parsing a CSI sequence
if (lec(3,2,'?')) { continue; }
if (lec(3,2,'=')) { continue; }
if (lec(3,2,'>')) { continue; }
if (lec(3,2,'!')) { continue; }
if (lec(3,2,SP )) { continue; }
if (lec(4,3,SP )) { continue; }
if (eps( CPN)) { processToken(token_csi_pn(cc), argv[0],argv[1]); resetTokenizer(); continue; }
// resize = \e[8;<row>;<col>t
if (eps(CPS)) {
processToken(token_csi_ps(cc, argv[0]), argv[1], argv[2]);
resetTokenizer();
continue;
}
if (epe( )) { processToken(token_csi_pe(cc), 0, 0); resetTokenizer(); continue; }
if (esp ( )) { processToken(token_csi_sp(cc), 0, 0); resetTokenizer(); continue; }
if (epsp( )) { processToken(token_csi_psp(cc, argv[0]), 0, 0); resetTokenizer(); continue; }
if (ees(DIG)) { addDigit(cc-'0'); continue; }
if (eec(';')) { addArgument(); continue; }
if (ees(INT)) { continue; }
if (p >= 3 && cc == 'y' && s[p - 2] == '*') { processChecksumRequest(argc, argv); resetTokenizer(); continue; }
for (int i = 0; i <= argc; i++) {
if (epp()) {
processToken(token_csi_pr(cc,argv[i]), 0, 0);
} else if (eeq()) {
processToken(token_csi_pq(cc), 0, 0); // spec. case for ESC[=0c or ESC[=c
} else if (egt()) {
processToken(token_csi_pg(cc), 0, 0); // spec. case for ESC[>0c or ESC[>c
} else if (cc == 'm' && argc - i >= 4 && (argv[i] == 38 || argv[i] == 48) && argv[i+1] == 2)
{
// ESC[ ... 48;2;<red>;<green>;<blue> ... m -or- ESC[ ... 38;2;<red>;<green>;<blue> ... m
i += 2;
processToken(token_csi_ps(cc, argv[i-2]), COLOR_SPACE_RGB, (argv[i] << 16) | (argv[i+1] << 8) | argv[i+2]);
i += 2;
} else if (cc == 'm' && argc - i >= 2 && (argv[i] == 38 || argv[i] == 48) && argv[i+1] == 5) {
// ESC[ ... 48;5;<index> ... m -or- ESC[ ... 38;5;<index> ... m
i += 2;
processToken(token_csi_ps(cc, argv[i-2]), COLOR_SPACE_256, argv[i]);
} else if (p < 2 || (charClass[s[p-2]] & (INT)) != (INT)) {
processToken(token_csi_ps(cc,argv[i]), 0, 0);
}
}
} else {
if (dcs ) { continue; /* TODO We don't xterm DCS, so we just eat it */ }
if (lec(2,0,ESC)) { processToken(token_esc(s[1]), 0, 0); resetTokenizer(); continue; }
if (les(3,1,SCS)) { processToken(token_esc_cs(s[1],s[2]), 0, 0); resetTokenizer(); continue; }
if (lec(3,1,'#')) { processToken(token_esc_de(s[2]), 0, 0); resetTokenizer(); continue; }
}
resetTokenizer();
/* clang-format on */
......
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