D20185.diff
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	diff --git a/resources/celerity/map.php b/resources/celerity/map.php
	--- a/resources/celerity/map.php
	+++ b/resources/celerity/map.php
	@@ -12,7 +12,7 @@
	'core.pkg.css' => '261ee8cf',
	'core.pkg.js' => '5ace8a1e',
	'differential.pkg.css' => 'c3f15714',
	- 'differential.pkg.js' => '67c9ea4c',
	+ 'differential.pkg.js' => 'be031567',
	'diffusion.pkg.css' => '42c75c37',
	'diffusion.pkg.js' => '91192d85',
	'maniphest.pkg.css' => '35995d6d',
	@@ -374,7 +374,7 @@
	'rsrc/js/application/dashboard/behavior-dashboard-move-panels.js' => '076bd092',
	'rsrc/js/application/dashboard/behavior-dashboard-query-panel-select.js' => '1e413dc9',
	'rsrc/js/application/dashboard/behavior-dashboard-tab-panel.js' => '9b1cbd76',
	- 'rsrc/js/application/diff/DiffChangeset.js' => 'e7cf10d6',
	+ 'rsrc/js/application/diff/DiffChangeset.js' => 'd0a85a85',
	'rsrc/js/application/diff/DiffChangesetList.js' => 'b91204e9',
	'rsrc/js/application/diff/DiffInline.js' => 'a4a14a94',
	'rsrc/js/application/diff/behavior-preview-link.js' => 'f51e9c17',
	@@ -753,7 +753,7 @@
	'phabricator-darklog' => '3b869402',
	'phabricator-darkmessage' => '26cd4b73',
	'phabricator-dashboard-css' => '4267d6c6',
	- 'phabricator-diff-changeset' => 'e7cf10d6',
	+ 'phabricator-diff-changeset' => 'd0a85a85',
	'phabricator-diff-changeset-list' => 'b91204e9',
	'phabricator-diff-inline' => 'a4a14a94',
	'phabricator-drag-and-drop-file-upload' => '4370900d',
	@@ -1973,6 +1973,17 @@
	'javelin-stratcom',
	'javelin-util',
	),
	+ 'd0a85a85' => array(
	+ 'javelin-dom',
	+ 'javelin-util',
	+ 'javelin-stratcom',
	+ 'javelin-install',
	+ 'javelin-workflow',
	+ 'javelin-router',
	+ 'javelin-behavior-device',
	+ 'javelin-vector',
	+ 'phabricator-diff-inline',
	+ ),
	'd12d214f' => array(
	'javelin-install',
	'javelin-dom',
	@@ -2038,17 +2049,6 @@
	'javelin-dom',
	'phabricator-draggable-list',
	),
	- 'e7cf10d6' => array(
	- 'javelin-dom',
	- 'javelin-util',
	- 'javelin-stratcom',
	- 'javelin-install',
	- 'javelin-workflow',
	- 'javelin-router',
	- 'javelin-behavior-device',
	- 'javelin-vector',
	- 'phabricator-diff-inline',
	- ),
	'e8240b50' => array(
	'javelin-behavior',
	'javelin-stratcom',
	diff --git a/src/applications/config/check/PhabricatorExtraConfigSetupCheck.php b/src/applications/config/check/PhabricatorExtraConfigSetupCheck.php
	--- a/src/applications/config/check/PhabricatorExtraConfigSetupCheck.php
	+++ b/src/applications/config/check/PhabricatorExtraConfigSetupCheck.php
	@@ -533,6 +533,8 @@
	'This ancient extension point has been replaced with other '.
	'mechanisms, including "AphrontSite".'),

	+ 'differential.whitespace-matters' => pht(
	+ 'Whitespace rendering is now handled automatically.'),
	);

	return $ancient_config;
	diff --git a/src/applications/differential/__tests__/DifferentialParseRenderTestCase.php b/src/applications/differential/__tests__/DifferentialParseRenderTestCase.php
	--- a/src/applications/differential/__tests__/DifferentialParseRenderTestCase.php
	+++ b/src/applications/differential/__tests__/DifferentialParseRenderTestCase.php
	@@ -31,7 +31,6 @@
	foreach (array('one', 'two') as $type) {
	$this->runParser($type, $data, $file, 'expect');
	$this->runParser($type, $data, $file, 'unshielded');
	- $this->runParser($type, $data, $file, 'whitespace');
	}
	}
	}
	@@ -44,25 +43,20 @@
	}

	$unshielded = false;
	- $whitespace = false;
	switch ($extension) {
	case 'unshielded':
	$unshielded = true;
	break;
	- case 'whitespace';
	- $unshielded = true;
	- $whitespace = true;
	- break;
	}

	$parsers = $this->buildChangesetParsers($type, $data, $file);
	- $actual = $this->renderParsers($parsers, $unshielded, $whitespace);
	+ $actual = $this->renderParsers($parsers, $unshielded);
	$expect = Filesystem::readFile($test_file);

	$this->assertEqual($expect, $actual, basename($test_file));
	}

	- private function renderParsers(array $parsers, $unshield, $whitespace) {
	+ private function renderParsers(array $parsers, $unshield) {
	$result = array();
	foreach ($parsers as $parser) {
	if ($unshield) {
	@@ -73,11 +67,6 @@
	$e_range = null;
	}

	- if ($whitespace) {
	- $parser->setWhitespaceMode(
	- DifferentialChangesetParser::WHITESPACE_SHOW_ALL);
	- }
	-
	$result[] = $parser->render($s_range, $e_range, array());
	}
	return implode(str_repeat('~', 80)."\n", $result);
	diff --git a/src/applications/differential/__tests__/data/generated.diff.one.unshielded b/src/applications/differential/__tests__/data/generated.diff.one.unshielded
	--- a/src/applications/differential/__tests__/data/generated.diff.one.unshielded
	+++ b/src/applications/differential/__tests__/data/generated.diff.one.unshielded
	@@ -1,6 +1,5 @@
	N 1 . @generated\n~
	-O 2 - \n~
	+N 2 . \n~
	O 3 - This is a generated file.\n~
	-N 2 + \n~
	N 3 + This is a generated file{(, full of generated code)}.\n~
	N 4 . \n~
	diff --git a/src/applications/differential/__tests__/data/generated.diff.two.unshielded b/src/applications/differential/__tests__/data/generated.diff.two.unshielded
	--- a/src/applications/differential/__tests__/data/generated.diff.two.unshielded
	+++ b/src/applications/differential/__tests__/data/generated.diff.two.unshielded
	@@ -1,7 +1,7 @@
	O 1 . @generated\n~
	N 1 . @generated\n~
	-O 2 - \n~
	-N 2 + \n~
	+O 2 . \n~
	+N 2 . \n~
	O 3 - This is a generated file.\n~
	N 3 + This is a generated file{(, full of generated code)}.\n~
	O 4 . \n~
	diff --git a/src/applications/differential/__tests__/data/whitespace.diff.one.expect b/src/applications/differential/__tests__/data/whitespace.diff.one.expect
	--- a/src/applications/differential/__tests__/data/whitespace.diff.one.expect
	+++ b/src/applications/differential/__tests__/data/whitespace.diff.one.expect
	@@ -2,4 +2,5 @@
	WHITESPACE
	WHITESPACE
	-
	-SHIELD (whitespace) This file was changed only by adding or removing whitespace.
	+O 1 - -=[-Rocket-Ship>\n~
	+N 1 + {> )}-=[-Rocket-Ship>\n~
	diff --git a/src/applications/differential/__tests__/data/whitespace.diff.two.expect b/src/applications/differential/__tests__/data/whitespace.diff.two.expect
	--- a/src/applications/differential/__tests__/data/whitespace.diff.two.expect
	+++ b/src/applications/differential/__tests__/data/whitespace.diff.two.expect
	@@ -2,4 +2,5 @@
	WHITESPACE
	WHITESPACE
	-
	-SHIELD (whitespace) This file was changed only by adding or removing whitespace.
	+O 1 - -=[-Rocket-Ship>\n~
	+N 1 + {> )}-=[-Rocket-Ship>\n~
	diff --git a/src/applications/differential/config/PhabricatorDifferentialConfigOptions.php b/src/applications/differential/config/PhabricatorDifferentialConfigOptions.php
	--- a/src/applications/differential/config/PhabricatorDifferentialConfigOptions.php
	+++ b/src/applications/differential/config/PhabricatorDifferentialConfigOptions.php
	@@ -80,18 +80,6 @@
	"Select and reorder revision fields.\n\n".
	"NOTE: This feature is under active development and subject ".
	"to change.")),
	- $this->newOption(
	- 'differential.whitespace-matters',
	- 'list<regex>',
	- array(
	- '/\.py$/',
	- '/\.l?hs$/',
	- '/\.ya?ml$/',
	- ))
	- ->setDescription(
	- pht(
	- "List of file regexps where whitespace is meaningful and should ".
	- "not use 'ignore-all' by default")),
	$this->newOption('differential.require-test-plan-field', 'bool', true)
	->setBoolOptions(
	array(
	diff --git a/src/applications/differential/controller/DifferentialRevisionViewController.php b/src/applications/differential/controller/DifferentialRevisionViewController.php
	--- a/src/applications/differential/controller/DifferentialRevisionViewController.php
	+++ b/src/applications/differential/controller/DifferentialRevisionViewController.php
	@@ -305,10 +305,6 @@
	$details = $this->buildDetails($revision, $field_list);
	$curtain = $this->buildCurtain($revision);

	- $whitespace = $request->getStr(
	- 'whitespace',
	- DifferentialChangesetParser::WHITESPACE_IGNORE_MOST);
	-
	$repository = $revision->getRepository();
	if ($repository) {
	$symbol_indexes = $this->buildSymbolIndexes(
	@@ -383,7 +379,6 @@
	->setDiff($target)
	->setRenderingReferences($rendering_references)
	->setVsMap($vs_map)
	- ->setWhitespace($whitespace)
	->setSymbolIndexes($symbol_indexes)
	->setTitle(pht('Diff %s', $target->getID()))
	->setBackground(PHUIObjectBoxView::BLUE_PROPERTY);
	@@ -412,7 +407,6 @@
	->setDiffUnitStatuses($broken_diffs)
	->setSelectedVersusDiffID($diff_vs)
	->setSelectedDiffID($target->getID())
	- ->setSelectedWhitespace($whitespace)
	->setCommitsForLinks($commits_for_links);

	$local_table = id(new DifferentialLocalCommitsView())
	@@ -1095,7 +1089,7 @@
	// this ends up being something like
	// D123.diff
	// or the verbose
	- // D123.vs123.id123.whitespaceignore-all.diff
	+ // D123.vs123.id123.highlightjs.diff
	// lame but nice to include these options
	$file_name = ltrim($request_uri->getPath(), '/').'.';
	foreach ($request_uri->getQueryParamsAsPairList() as $pair) {
	diff --git a/src/applications/differential/parser/DifferentialChangesetParser.php b/src/applications/differential/parser/DifferentialChangesetParser.php
	--- a/src/applications/differential/parser/DifferentialChangesetParser.php
	+++ b/src/applications/differential/parser/DifferentialChangesetParser.php
	@@ -19,7 +19,6 @@
	protected $specialAttributes = array();

	protected $changeset;
	- protected $whitespaceMode = null;

	protected $renderCacheKey = null;

	@@ -163,7 +162,6 @@
	}

	public function readParametersFromRequest(AphrontRequest $request) {
	- $this->setWhitespaceMode($request->getStr('whitespace'));
	$this->setCharacterEncoding($request->getStr('encoding'));
	$this->setHighlightAs($request->getStr('highlight'));

	@@ -191,20 +189,14 @@
	return $this;
	}

	- const CACHE_VERSION = 12;
	+ const CACHE_VERSION = 13;
	const CACHE_MAX_SIZE = 8e6;

	const ATTR_GENERATED = 'attr:generated';
	const ATTR_DELETED = 'attr:deleted';
	const ATTR_UNCHANGED = 'attr:unchanged';
	- const ATTR_WHITELINES = 'attr:white';
	const ATTR_MOVEAWAY = 'attr:moveaway';

	- const WHITESPACE_SHOW_ALL = 'show-all';
	- const WHITESPACE_IGNORE_TRAILING = 'ignore-trailing';
	- const WHITESPACE_IGNORE_MOST = 'ignore-most';
	- const WHITESPACE_IGNORE_ALL = 'ignore-all';
	-
	public function setOldLines(array $lines) {
	$this->old = $lines;
	return $this;
	@@ -336,11 +328,6 @@
	return $this;
	}

	- public function setWhitespaceMode($whitespace_mode) {
	- $this->whitespaceMode = $whitespace_mode;
	- return $this;
	- }
	-
	public function setRenderingReference($ref) {
	$this->renderingReference = $ref;
	return $this;
	@@ -574,10 +561,6 @@
	return idx($this->specialAttributes, self::ATTR_UNCHANGED, false);
	}

	- public function isWhitespaceOnly() {
	- return idx($this->specialAttributes, self::ATTR_WHITELINES, false);
	- }
	-
	public function isMoveAway() {
	return idx($this->specialAttributes, self::ATTR_MOVEAWAY, false);
	}
	@@ -624,18 +607,8 @@
	}

	private function tryCacheStuff() {
	- $whitespace_mode = $this->whitespaceMode;
	- switch ($whitespace_mode) {
	- case self::WHITESPACE_SHOW_ALL:
	- case self::WHITESPACE_IGNORE_TRAILING:
	- case self::WHITESPACE_IGNORE_ALL:
	- break;
	- default:
	- $whitespace_mode = self::WHITESPACE_IGNORE_MOST;
	- break;
	- }
	+ $skip_cache = false;

	- $skip_cache = ($whitespace_mode != self::WHITESPACE_IGNORE_MOST);
	if ($this->disableCache) {
	$skip_cache = true;
	}
	@@ -648,8 +621,6 @@
	$skip_cache = true;
	}

	- $this->whitespaceMode = $whitespace_mode;
	-
	$changeset = $this->changeset;

	if ($changeset->getFileType() != DifferentialChangeType::FILE_TEXT &&
	@@ -668,71 +639,10 @@
	}

	private function process() {
	- $whitespace_mode = $this->whitespaceMode;
	$changeset = $this->changeset;

	- $ignore_all = (($whitespace_mode == self::WHITESPACE_IGNORE_MOST) \|\|
	- ($whitespace_mode == self::WHITESPACE_IGNORE_ALL));
	-
	- $force_ignore = ($whitespace_mode == self::WHITESPACE_IGNORE_ALL);
	-
	- if (!$force_ignore) {
	- if ($ignore_all && $changeset->getWhitespaceMatters()) {
	- $ignore_all = false;
	- }
	- }
	-
	- // The "ignore all whitespace" algorithm depends on rediffing the
	- // files, and we currently need complete representations of both
	- // files to do anything reasonable. If we only have parts of the files,
	- // don't use the "ignore all" algorithm.
	- if ($ignore_all) {
	- $hunks = $changeset->getHunks();
	- if (count($hunks) !== 1) {
	- $ignore_all = false;
	- } else {
	- $first_hunk = reset($hunks);
	- if ($first_hunk->getOldOffset() != 1 \|\|
	- $first_hunk->getNewOffset() != 1) {
	- $ignore_all = false;
	- }
	- }
	- }
	-
	- if ($ignore_all) {
	- $old_file = $changeset->makeOldFile();
	- $new_file = $changeset->makeNewFile();
	- if ($old_file == $new_file) {
	- // If the old and new files are exactly identical, the synthetic
	- // diff below will give us nonsense and whitespace modes are
	- // irrelevant anyway. This occurs when you, e.g., copy a file onto
	- // itself in Subversion (see T271).
	- $ignore_all = false;
	- }
	- }
	-
	$hunk_parser = new DifferentialHunkParser();
	- $hunk_parser->setWhitespaceMode($whitespace_mode);
	$hunk_parser->parseHunksForLineData($changeset->getHunks());
	-
	- // Depending on the whitespace mode, we may need to compute a different
	- // set of changes than the set of changes in the hunk data (specifically,
	- // we might want to consider changed lines which have only whitespace
	- // changes as unchanged).
	- if ($ignore_all) {
	- $engine = new PhabricatorDifferenceEngine();
	- $engine->setIgnoreWhitespace(true);
	- $no_whitespace_changeset = $engine->generateChangesetFromFileContent(
	- $old_file,
	- $new_file);
	-
	- $type_parser = new DifferentialHunkParser();
	- $type_parser->parseHunksForLineData($no_whitespace_changeset->getHunks());
	-
	- $hunk_parser->setOldLineTypeMap($type_parser->getOldLineTypeMap());
	- $hunk_parser->setNewLineTypeMap($type_parser->getNewLineTypeMap());
	- }
	-
	$hunk_parser->reparseHunksForSpecialAttributes();

	$unchanged = false;
	@@ -753,7 +663,6 @@
	$this->setSpecialAttributes(array(
	self::ATTR_UNCHANGED => $unchanged,
	self::ATTR_DELETED => $hunk_parser->getIsDeleted(),
	- self::ATTR_WHITELINES => !$hunk_parser->getHasTextChanges(),
	self::ATTR_MOVEAWAY => $moveaway,
	));

	@@ -971,10 +880,6 @@
	pht('The contents of this file were not changed.'),
	$type);
	}
	- } else if ($this->isWhitespaceOnly()) {
	- $shield = $renderer->renderShield(
	- pht('This file was changed only by adding or removing whitespace.'),
	- 'whitespace');
	} else if ($this->isDeleted()) {
	$shield = $renderer->renderShield(
	pht('This file was completely deleted.'));
	diff --git a/src/applications/differential/parser/DifferentialHunkParser.php b/src/applications/differential/parser/DifferentialHunkParser.php
	--- a/src/applications/differential/parser/DifferentialHunkParser.php
	+++ b/src/applications/differential/parser/DifferentialHunkParser.php
	@@ -7,7 +7,6 @@
	private $intraLineDiffs;
	private $depthOnlyLines;
	private $visibleLinesMask;
	- private $whitespaceMode;

	/**
	* Get a map of lines on which hunks start, other than line 1. This
	@@ -125,21 +124,6 @@
	return $this->depthOnlyLines;
	}

	- public function setWhitespaceMode($white_space_mode) {
	- $this->whitespaceMode = $white_space_mode;
	- return $this;
	- }
	-
	- private function getWhitespaceMode() {
	- if ($this->whitespaceMode === null) {
	- throw new Exception(
	- pht(
	- 'You must %s before accessing this data.',
	- 'setWhitespaceMode'));
	- }
	- return $this->whitespaceMode;
	- }
	-
	public function getIsDeleted() {
	foreach ($this->getNewLines() as $line) {
	if ($line) {
	@@ -159,13 +143,6 @@
	return false;
	}

	- /**
	- * Returns true if the hunks change any text, not just whitespace.
	- */
	- public function getHasTextChanges() {
	- return $this->getHasChanges('text');
	- }
	-
	/**
	* Returns true if the hunks change anything, including whitespace.
	*/
	@@ -193,9 +170,6 @@
	}

	if ($o['type'] !== $n['type']) {
	- // The types are different, so either the underlying text is actually
	- // different or whatever whitespace rules we're using consider them
	- // different.
	return true;
	}

	@@ -278,63 +252,6 @@
	$this->setOldLines($rebuild_old);
	$this->setNewLines($rebuild_new);

	- $this->updateChangeTypesForWhitespaceMode();
	-
	- return $this;
	- }
	-
	- private function updateChangeTypesForWhitespaceMode() {
	- $mode = $this->getWhitespaceMode();
	-
	- $mode_show_all = DifferentialChangesetParser::WHITESPACE_SHOW_ALL;
	- if ($mode === $mode_show_all) {
	- // If we're showing all whitespace, we don't need to perform any updates.
	- return;
	- }
	-
	- $mode_trailing = DifferentialChangesetParser::WHITESPACE_IGNORE_TRAILING;
	- $is_trailing = ($mode === $mode_trailing);
	-
	- $new = $this->getNewLines();
	- $old = $this->getOldLines();
	- foreach ($old as $key => $o) {
	- $n = $new[$key];
	-
	- if (!$o \|\| !$n) {
	- continue;
	- }
	-
	- if ($is_trailing) {
	- // In "trailing" mode, we need to identify lines which are marked
	- // changed but differ only by trailing whitespace. We mark these lines
	- // unchanged.
	- if ($o['type'] != $n['type']) {
	- if (rtrim($o['text']) === rtrim($n['text'])) {
	- $old[$key]['type'] = null;
	- $new[$key]['type'] = null;
	- }
	- }
	- } else {
	- // In "ignore most" and "ignore all" modes, we need to identify lines
	- // which are marked unchanged but have internal whitespace changes.
	- // We want to ignore leading and trailing whitespace changes only, not
	- // internal whitespace changes (`diff` doesn't have a mode for this, so
	- // we have to fix it here). If the text is marked unchanged but the
	- // old and new text differs by internal space, mark the lines changed.
	- if ($o['type'] === null && $n['type'] === null) {
	- if ($o['text'] !== $n['text']) {
	- if (trim($o['text']) !== trim($n['text'])) {
	- $old[$key]['type'] = '-';
	- $new[$key]['type'] = '+';
	- }
	- }
	- }
	- }
	- }
	-
	- $this->setOldLines($old);
	- $this->setNewLines($new);
	-
	return $this;
	}

	diff --git a/src/applications/differential/parser/DifferentialLineAdjustmentMap.php b/src/applications/differential/parser/DifferentialLineAdjustmentMap.php
	--- a/src/applications/differential/parser/DifferentialLineAdjustmentMap.php
	+++ b/src/applications/differential/parser/DifferentialLineAdjustmentMap.php
	@@ -359,7 +359,6 @@
	}

	$changeset = id(new PhabricatorDifferenceEngine())
	- ->setIgnoreWhitespace(true)
	->generateChangesetFromFileContent($u_old, $v_old);

	$results[$u][$v] = self::newFromHunks(
	diff --git a/src/applications/differential/render/DifferentialChangesetHTMLRenderer.php b/src/applications/differential/render/DifferentialChangesetHTMLRenderer.php
	--- a/src/applications/differential/render/DifferentialChangesetHTMLRenderer.php
	+++ b/src/applications/differential/render/DifferentialChangesetHTMLRenderer.php
	@@ -367,7 +367,6 @@
	$reference = $this->getRenderingReference();

	if ($force !== 'text' &&
	- $force !== 'whitespace' &&
	$force !== 'none' &&
	$force !== 'default') {
	throw new Exception(
	@@ -388,10 +387,6 @@
	'range' => $range,
	);

	- if ($force == 'whitespace') {
	- $meta['whitespace'] = DifferentialChangesetParser::WHITESPACE_SHOW_ALL;
	- }
	-
	$content = array();
	$content[] = $message;
	if ($force !== 'none') {
	diff --git a/src/applications/differential/render/DifferentialChangesetRenderer.php b/src/applications/differential/render/DifferentialChangesetRenderer.php
	--- a/src/applications/differential/render/DifferentialChangesetRenderer.php
	+++ b/src/applications/differential/render/DifferentialChangesetRenderer.php
	@@ -406,9 +406,6 @@
	* important (e.g., generated code).
	* - `"text"`: Force the text to be shown. This is probably only relevant
	* when a file is not changed.
	- * - `"whitespace"`: Force the text to be shown, and the diff to be
	- * rendered with all whitespace shown. This is probably only relevant
	- * when a file is changed only by altering whitespace.
	* - `"none"`: Don't show the link (e.g., text not available).
	*
	* @param string Message explaining why the diff is hidden.
	diff --git a/src/applications/differential/storage/DifferentialChangeset.php b/src/applications/differential/storage/DifferentialChangeset.php
	--- a/src/applications/differential/storage/DifferentialChangeset.php
	+++ b/src/applications/differential/storage/DifferentialChangeset.php
	@@ -249,17 +249,6 @@
	return $path;
	}

	- public function getWhitespaceMatters() {
	- $config = PhabricatorEnv::getEnvConfig('differential.whitespace-matters');
	- foreach ($config as $regexp) {
	- if (preg_match($regexp, $this->getFilename())) {
	- return true;
	- }
	- }
	-
	- return false;
	- }
	-
	public function attachDiff(DifferentialDiff $diff) {
	$this->diff = $diff;
	return $this;
	diff --git a/src/applications/differential/view/DifferentialChangesetDetailView.php b/src/applications/differential/view/DifferentialChangesetDetailView.php
	--- a/src/applications/differential/view/DifferentialChangesetDetailView.php
	+++ b/src/applications/differential/view/DifferentialChangesetDetailView.php
	@@ -9,7 +9,6 @@
	private $id;
	private $vsChangesetID;
	private $renderURI;
	- private $whitespace;
	private $renderingRef;
	private $autoload;
	private $loaded;
	@@ -42,15 +41,6 @@
	return $this->renderingRef;
	}

	- public function setWhitespace($whitespace) {
	- $this->whitespace = $whitespace;
	- return $this;
	- }
	-
	- public function getWhitespace() {
	- return $this->whitespace;
	- }
	-
	public function setRenderURI($render_uri) {
	$this->renderURI = $render_uri;
	return $this;
	@@ -196,7 +186,6 @@
	'left' => $left_id,
	'right' => $right_id,
	'renderURI' => $this->getRenderURI(),
	- 'whitespace' => $this->getWhitespace(),
	'highlight' => null,
	'renderer' => $this->getRenderer(),
	'ref' => $this->getRenderingRef(),
	diff --git a/src/applications/differential/view/DifferentialChangesetListView.php b/src/applications/differential/view/DifferentialChangesetListView.php
	--- a/src/applications/differential/view/DifferentialChangesetListView.php
	+++ b/src/applications/differential/view/DifferentialChangesetListView.php
	@@ -7,7 +7,6 @@
	private $references = array();
	private $inlineURI;
	private $renderURI = '/differential/changeset/';
	- private $whitespace;
	private $background;
	private $header;
	private $isStandalone;
	@@ -100,11 +99,6 @@
	return $this;
	}

	- public function setWhitespace($whitespace) {
	- $this->whitespace = $whitespace;
	- return $this;
	- }
	-
	public function setVsMap(array $vs_map) {
	$this->vsMap = $vs_map;
	return $this;
	@@ -180,7 +174,6 @@
	$detail->setRenderingRef($ref);

	$detail->setRenderURI($this->renderURI);
	- $detail->setWhitespace($this->whitespace);
	$detail->setRenderer($renderer);

	if ($this->getParser()) {
	@@ -352,8 +345,7 @@
	$meta = array();

	$qparams = array(
	- 'ref' => $ref,
	- 'whitespace' => $this->whitespace,
	+ 'ref' => $ref,
	);

	if ($this->standaloneURI) {
	diff --git a/src/applications/differential/view/DifferentialRevisionUpdateHistoryView.php b/src/applications/differential/view/DifferentialRevisionUpdateHistoryView.php
	--- a/src/applications/differential/view/DifferentialRevisionUpdateHistoryView.php
	+++ b/src/applications/differential/view/DifferentialRevisionUpdateHistoryView.php
	@@ -5,7 +5,6 @@
	private $diffs = array();
	private $selectedVersusDiffID;
	private $selectedDiffID;
	- private $selectedWhitespace;
	private $commitsForLinks = array();
	private $unitStatus = array();

	@@ -25,11 +24,6 @@
	return $this;
	}

	- public function setSelectedWhitespace($whitespace) {
	- $this->selectedWhitespace = $whitespace;
	- return $this;
	- }
	-
	public function setCommitsForLinks(array $commits) {
	assert_instances_of($commits, 'PhabricatorRepositoryCommit');
	$this->commitsForLinks = $commits;
	@@ -224,28 +218,6 @@
	'radios' => $radios,
	));

	- $options = array(
	- DifferentialChangesetParser::WHITESPACE_IGNORE_ALL => pht('Ignore All'),
	- DifferentialChangesetParser::WHITESPACE_IGNORE_MOST => pht('Ignore Most'),
	- DifferentialChangesetParser::WHITESPACE_IGNORE_TRAILING =>
	- pht('Ignore Trailing'),
	- DifferentialChangesetParser::WHITESPACE_SHOW_ALL => pht('Show All'),
	- );
	-
	- foreach ($options as $value => $label) {
	- $options[$value] = phutil_tag(
	- 'option',
	- array(
	- 'value' => $value,
	- 'selected' => ($value == $this->selectedWhitespace)
	- ? 'selected'
	- : null,
	- ),
	- $label);
	- }
	- $select = phutil_tag('select', array('name' => 'whitespace'), $options);
	-
	-
	$table = id(new AphrontTableView($rows));
	$table->setHeaders(
	array(
	@@ -291,13 +263,6 @@
	'class' => 'differential-update-history-footer',
	),
	array(
	- phutil_tag(
	- 'label',
	- array(),
	- array(
	- pht('Whitespace Changes:'),
	- $select,
	- )),
	phutil_tag(
	'button',
	array(),
	diff --git a/src/applications/diffusion/controller/DiffusionChangeController.php b/src/applications/diffusion/controller/DiffusionChangeController.php
	--- a/src/applications/diffusion/controller/DiffusionChangeController.php
	+++ b/src/applications/diffusion/controller/DiffusionChangeController.php
	@@ -64,9 +64,6 @@
	$changeset_view->setRawFileURIs($left_uri, $right_uri);

	$changeset_view->setRenderURI($repository->getPathURI('diff/'));
	-
	- $changeset_view->setWhitespace(
	- DifferentialChangesetParser::WHITESPACE_SHOW_ALL);
	$changeset_view->setUser($viewer);
	$changeset_view->setHeader($changeset_header);

	diff --git a/src/applications/diffusion/controller/DiffusionDiffController.php b/src/applications/diffusion/controller/DiffusionDiffController.php
	--- a/src/applications/diffusion/controller/DiffusionDiffController.php
	+++ b/src/applications/diffusion/controller/DiffusionDiffController.php
	@@ -88,9 +88,6 @@
	($viewer->getPHID() == $commit->getAuthorPHID()));
	$parser->setObjectOwnerPHID($commit->getAuthorPHID());

	- $parser->setWhitespaceMode(
	- DifferentialChangesetParser::WHITESPACE_SHOW_ALL);
	-
	$inlines = PhabricatorAuditInlineComment::loadDraftAndPublishedComments(
	$viewer,
	$commit->getPHID(),
	diff --git a/src/docs/user/userguide/differential_faq.diviner b/src/docs/user/userguide/differential_faq.diviner
	--- a/src/docs/user/userguide/differential_faq.diviner
	+++ b/src/docs/user/userguide/differential_faq.diviner
	@@ -51,22 +51,6 @@
	PHP. See the `pygments.enabled` configuration setting.


	-= What do the whitespace options mean? =
	-
	-Most of these are pretty straightforward, but "Ignore Most" is not:
	-
	- - Show All: Show all whitespace.
	- - Ignore Trailing: Ignore changes which only affect trailing whitespace.
	- - Ignore Most: Ignore changes which only affect leading or trailing
	- whitespace (but not whitespace changes between non-whitespace characters)
	- in files which are not marked as having significant whitespace.
	- In those files, show whitespace changes. By default, Python (.py) and
	- Haskell (.lhs, .hs) are marked as having significant whitespace, but this
	- can be changed in the `differential.whitespace-matters` configuration
	- setting.
	- - Ignore All: Ignore all whitespace changes in all files.
	-
	-
	= What do the very light green and red backgrounds mean? =

	Differential uses these colors to mark changes coming from rebase: they are
	diff --git a/src/infrastructure/diff/PhabricatorDifferenceEngine.php b/src/infrastructure/diff/PhabricatorDifferenceEngine.php
	--- a/src/infrastructure/diff/PhabricatorDifferenceEngine.php
	+++ b/src/infrastructure/diff/PhabricatorDifferenceEngine.php
	@@ -10,7 +10,6 @@
	final class PhabricatorDifferenceEngine extends Phobject {


	- private $ignoreWhitespace;
	private $oldName;
	private $newName;

	@@ -18,19 +17,6 @@
	/* -( Configuring the Engine )--------------------------------------------- */


	- /**
	- * If true, ignore whitespace when computing differences.
	- *
	- * @param bool Ignore whitespace?
	- * @return this
	- * @task config
	- */
	- public function setIgnoreWhitespace($ignore_whitespace) {
	- $this->ignoreWhitespace = $ignore_whitespace;
	- return $this;
	- }
	-
	-
	/**
	* Set the name to identify the old file with. Primarily cosmetic.
	*
	@@ -73,9 +59,6 @@
	public function generateRawDiffFromFileContent($old, $new) {

	$options = array();
	- if ($this->ignoreWhitespace) {
	- $options[] = '-bw';
	- }

	// Generate diffs with full context.
	$options[] = '-U65535';
	@@ -100,12 +83,10 @@
	$new_tmp);

	if (!$err) {
	- // This indicates that the two files are the same (or, possibly, the
	- // same modulo whitespace differences, which is why we can't do this
	- // check trivially before running `diff`). Build a synthetic, changeless
	- // diff so that we can still render the raw, unchanged file instead of
	- // being forced to just say "this file didn't change" since we don't have
	- // the content.
	+ // This indicates that the two files are the same. Build a synthetic,
	+ // changeless diff so that we can still render the raw, unchanged file
	+ // instead of being forced to just say "this file didn't change" since we
	+ // don't have the content.

	$entire_file = explode("\n", $old);
	foreach ($entire_file as $k => $line) {
	@@ -123,26 +104,6 @@
	"+++ {$new_name}\n".
	"@@ -1,{$len} +1,{$len} @@\n".
	$entire_file."\n";
	- } else {
	- if ($this->ignoreWhitespace) {
	-
	- // Under "-bw", `diff` is inconsistent about emitting "\ No newline
	- // at end of file". For instance, a long file with a change in the
	- // middle will emit a contextless "\ No newline..." at the end if a
	- // newline is removed, but not if one is added. A file with a change
	- // at the end will emit the "old" "\ No newline..." block only, even
	- // if the newline was not removed. Since we're ostensibly ignoring
	- // whitespace changes, just drop these lines if they appear anywhere
	- // in the diff.
	-
	- $lines = explode("\n", $diff);
	- foreach ($lines as $key => $line) {
	- if (isset($line[0]) && $line[0] == '\\') {
	- unset($lines[$key]);
	- }
	- }
	- $diff = implode("\n", $lines);
	- }
	}

	return $diff;
	diff --git a/webroot/rsrc/js/application/diff/DiffChangeset.js b/webroot/rsrc/js/application/diff/DiffChangeset.js
	--- a/webroot/rsrc/js/application/diff/DiffChangeset.js
	+++ b/webroot/rsrc/js/application/diff/DiffChangeset.js
	@@ -22,7 +22,6 @@

	this._renderURI = data.renderURI;
	this._ref = data.ref;
	- this._whitespace = data.whitespace;
	this._renderer = data.renderer;
	this._highlight = data.highlight;
	this._encoding = data.encoding;
	@@ -46,7 +45,6 @@

	_renderURI: null,
	_ref: null,
	- _whitespace: null,
	_renderer: null,
	_highlight: null,
	_encoding: null,
	@@ -310,7 +308,6 @@
	_getViewParameters: function() {
	return {
	ref: this._ref,
	- whitespace: this._whitespace \|\| '',
	renderer: this.getRenderer() \|\| '',
	highlight: this._highlight \|\| '',
	encoding: this._encoding \|\| ''

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