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phab/src/applications/differential/storage/DifferentialHunk.php
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DifferentialHunk.php
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<?php
final class DifferentialHunk extends DifferentialDAO {
protected $changesetID;
protected $changes;
protected $oldOffset;
protected $oldLen;
protected $newOffset;
protected $newLen;
public function getAddedLines() {
return $this->makeContent($include = '+');
}
public function getRemovedLines() {
return $this->makeContent($include = '-');
}
public function makeNewFile() {
return implode('', $this->makeContent($include = ' +'));
}
public function makeOldFile() {
return implode('', $this->makeContent($include = ' -'));
}
public function makeChanges() {
return implode('', $this->makeContent($include = '-+'));
}
final private function makeContent($include) {
$results = array();
$lines = explode("\n", $this->changes);
// NOTE: To determine whether the recomposed file should have a trailing
// newline, we look for a "\ No newline at end of file" line which appears
// after a line which we don't exclude. For example, if we're constructing
// the "new" side of a diff (excluding "-"), we want to ignore this one:
//
// - x
// \ No newline at end of file
// + x
//
// ...since it's talking about the "old" side of the diff, but interpret
// this as meaning we should omit the newline:
//
// - x
// + x
// \ No newline at end of file
$n = (strpos($include, '+') !== false ?
$this->newOffset :
$this->oldOffset);
$use_next_newline = false;
foreach ($lines as $line) {
if (!isset($line[0])) {
continue;
}
if ($line[0] == '\\') {
if ($use_next_newline) {
$results[last_key($results)] = rtrim(end($results), "\n");
}
} else if (strpos($include, $line[0]) === false) {
$use_next_newline = false;
} else {
$use_next_newline = true;
$results[$n] = substr($line, 1)."\n";
}
if ($line[0] == ' ' || strpos($include, $line[0]) !== false) {
$n++;
}
}
return $results;
}
}
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