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Enable arrow keys to browse matched autocomplete options

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This commit is contained in:
Lee McDermott 2013-01-05 06:23:46 +00:00
parent 31ff3db517
commit a4d711cb2a
1 changed files with 65 additions and 64 deletions
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91
src/Symfony/Component/Console/Helper/DialogHelper.php
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@ -86,10 +86,13 @@ class DialogHelper extends Helper
} }
$ret = trim($ret); $ret = trim($ret);
} else { } else {
$i = 0;
$currentMatched = false;
$ret = ''; $ret = '';
$i = 0;
$matches = array();
$numMatches = 0;
$ofs = 0;
// Disable icanon (so we can fread each keypress) and echo (we'll do echoing here instead) // Disable icanon (so we can fread each keypress) and echo (we'll do echoing here instead)
shell_exec('stty -icanon -echo'); shell_exec('stty -icanon -echo');
@ -98,25 +101,9 @@ class DialogHelper extends Helper
// Read a keypress // Read a keypress
while ($c = fread($inputStream, 1)) { while ($c = fread($inputStream, 1)) {
// Did we read an escape sequence?
if ("\033" === $c) {
$c .= fread($inputStream, 2);
// Escape sequences for arrow keys
if ('A' === $c[2] || 'B' === $c[2] || 'C' === $c[2] || 'D' === $c[2]) {
// todo
}
continue;
}
// Backspace Character // Backspace Character
if ("\177" === $c) { if ("\177" === $c) {
if ($i === 0) { if (0 === $numMatches && 0 !== $i) {
continue;
}
if (false === $currentMatched) {
$i--; $i--;
// Move cursor backwards // Move cursor backwards
$output->write("\033[1D"); $output->write("\033[1D");
@ -126,16 +113,35 @@ class DialogHelper extends Helper
$output->write("\033[K"); $output->write("\033[K");
$ret = substr($ret, 0, $i); $ret = substr($ret, 0, $i);
$currentMatched = false; $matches = array();
$numMatches = 0;
continue; continue;
} }
// Did we read an escape sequence?
if ("\033" === $c) {
$c .= fread($inputStream, 2);
if ('A' === $c[2] || 'B' === $c[2]) {
if (0 === $i) {
$matches = $autocomplete;
$numMatches = count($matches);
}
if (0 === $numMatches) {
continue;
}
$ofs += ('A' === $c[2]) ? -1 : 1;
$ofs = ($numMatches + $ofs) % $numMatches;
}
} else if (ord($c) < 32) {
if ("\t" === $c || "\n" === $c) { if ("\t" === $c || "\n" === $c) {
if (false !== $currentMatched) { if ($numMatches > 0) {
$ret = $matches[$ofs];
// Echo out completed match // Echo out completed match
$output->write(substr($autocomplete[$currentMatched], strlen($ret))); $output->write(substr($ret, $i));
$ret = $autocomplete[$currentMatched];
$i = strlen($ret); $i = strlen($ret);
} }
@ -144,45 +150,40 @@ class DialogHelper extends Helper
break; break;
} }
$currentMatched = false; $matches = array();
$numMatches = 0;
continue;
} }
if (ord($c) < 32) {
continue; continue;
} } else {
$output->write($c); $output->write($c);
$ret .= $c; $ret .= $c;
$i++; $i++;
// Erase characters from cursor to end of line $matches = array();
$output->write("\033[K"); $numMatches = 0;
$ofs = 0;
foreach ($autocomplete as $j => $value) { foreach ($autocomplete as $value) {
// Get a substring of the current autocomplete item based on number of chars typed (e.g. AcmeDemoBundle = Acme) // Get a substring of the current autocomplete item based on number of chars typed (e.g. AcmeDemoBundle = Acme)
$matchTest = substr($value, 0, $i); $matchTest = substr($value, 0, $i);
if ($ret === $matchTest) { if ($ret === $matchTest && $i !== strlen($value)) {
if ($i === strlen($value)) { $matches[$numMatches++] = $value;
$currentMatched = false; }
break; }
} }
// Erase characters from cursor to end of line
$output->write("\033[K");
if ($numMatches > 0) {
// Save cursor position // Save cursor position
$output->write("\0337"); $output->write("\0337");
// Write highlighted text
$output->write('<hl>' . substr($value, $i) . '</hl>'); $output->write('<hl>' . substr($matches[$ofs], $i) . '</hl>');
// Restore cursor position // Restore cursor position
$output->write("\0338"); $output->write("\0338");
$currentMatched = $j;
break;
}
$currentMatched = false;
} }
} }