Differential D20479 Diff 48861 src/infrastructure/diff/PhabricatorDiffScopeEngine.php

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src/infrastructure/diff/PhabricatorDiffScopeEngine.php

Show First 20 Lines • Show All 77 Lines • ▼ Show 20 Lines	for ($ii = $line - 1; $ii > $search_until; $ii--) {

$depth = $depth_map[$ii];		$depth = $depth_map[$ii];

// This line is all whitespace. This isn't a possible match.		// This line is all whitespace. This isn't a possible match.
if ($depth === null) {		if ($depth === null) {
continue;		continue;
}		}

		// Don't match context lines which are too deeply indented, since they
		// are very unlikely to be symbol definitions.
		if ($depth > 2) {
		continue;
		}

// The depth is the same as (or greater than) the depth we started with,		// The depth is the same as (or greater than) the depth we started with,
// so this isn't a possible match.		// so this isn't a possible match.
if ($depth >= $line_depth) {		if ($depth >= $line_depth) {
continue;		continue;
}		}

// Reject lines which begin with "}" or "{". These lines are probably		// Reject lines which begin with "}" or "{". These lines are probably
// never good matches.		// never good matches.
Show All 10 Lines	final class PhabricatorDiffScopeEngine
private function getLineDepthMap() {		private function getLineDepthMap() {
if (!$this->lineDepthMap) {		if (!$this->lineDepthMap) {
$this->lineDepthMap = $this->newLineDepthMap();		$this->lineDepthMap = $this->newLineDepthMap();
}		}

return $this->lineDepthMap;		return $this->lineDepthMap;
}		}

		private function getTabWidth() {
		// TODO: This should be configurable once we handle tab widths better.
		return 2;
		}

private function newLineDepthMap() {		private function newLineDepthMap() {
$text_map = $this->getLineTextMap();		$text_map = $this->getLineTextMap();
		$tab_width = $this->getTabWidth();
// TODO: This should be configurable once we handle tab widths better.
$tab_width = 2;

$depth_map = array();		$depth_map = array();
foreach ($text_map as $line_number => $line_text) {		foreach ($text_map as $line_number => $line_text) {
if ($line_text === null) {		if ($line_text === null) {
$depth_map[$line_number] = null;		$depth_map[$line_number] = null;
continue;		continue;
}		}

Show All 13 Lines	foreach ($text_map as $line_number => $line_text) {
} else if ($c == "\t") {		} else if ($c == "\t") {
$count += $tab_width;		$count += $tab_width;
} else {		} else {
break;		break;
}		}
}		}

// Round down to cheat our way through the " *" parts of docblock		// Round down to cheat our way through the " *" parts of docblock
// comments. This is generally a reasonble heuristic because odd tab		// comments.
// widths are exceptionally rare.		$depth = (int)floor($count / $tab_width);
$depth = ($count >> 1);

$depth_map[$line_number] = $depth;		$depth_map[$line_number] = $depth;
}		}

return $depth_map;		return $depth_map;
}		}

}		}