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	diff --git a/src/applications/diffusion/controller/DiffusionBrowseFileController.php b/src/applications/diffusion/controller/DiffusionBrowseFileController.php
	index 6246dddb40..e5eeae6a41 100644
	--- a/src/applications/diffusion/controller/DiffusionBrowseFileController.php
	+++ b/src/applications/diffusion/controller/DiffusionBrowseFileController.php
	@@ -1,862 +1,863 @@
	<?php

	/*
	* Copyright 2012 Facebook, Inc.
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	final class DiffusionBrowseFileController extends DiffusionController {

	private $corpusType = 'text';

	public function processRequest() {

	$request = $this->getRequest();
	$drequest = $this->getDiffusionRequest();

	$before = $request->getStr('before');
	if ($before) {
	return $this->buildBeforeResponse($before);
	}

	$path = $drequest->getPath();

	$selected = $request->getStr('view');
	$preferences = $request->getUser()->loadPreferences();
	if (!$selected) {
	$selected = $preferences->getPreference(
	PhabricatorUserPreferences::PREFERENCE_DIFFUSION_VIEW,
	'highlighted');
	} else if ($request->isFormPost() && $selected != 'raw') {
	$preferences->setPreference(
	PhabricatorUserPreferences::PREFERENCE_DIFFUSION_VIEW,
	$selected);
	$preferences->save();

	return id(new AphrontRedirectResponse())
	->setURI($request->getRequestURI()->alter('view', $selected));
	}

	$needs_blame = ($selected == 'blame' \|\| $selected == 'plainblame');

	$file_query = DiffusionFileContentQuery::newFromDiffusionRequest(
	$this->diffusionRequest);
	$file_query->setViewer($request->getUser());
	$file_query->setNeedsBlame($needs_blame);
	$file_query->loadFileContent();
	$data = $file_query->getRawData();

	if ($selected === 'raw') {
	return $this->buildRawResponse($path, $data);
	}

	// Build the content of the file.
	$corpus = $this->buildCorpus(
	$selected,
	$file_query,
	$needs_blame,
	$drequest,
	$path,
	$data);

	require_celerity_resource('diffusion-source-css');

	if ($this->corpusType == 'text') {
	$view_select_panel = $this->renderViewSelectPanel($selected);
	} else {
	$view_select_panel = null;
	}

	// Render the page.
	$content = array();
	$content[] = $this->buildCrumbs(
	array(
	'branch' => true,
	'path' => true,
	'view' => 'browse',
	));

	$follow = $request->getStr('follow');
	if ($follow) {
	$notice = new AphrontErrorView();
	$notice->setSeverity(AphrontErrorView::SEVERITY_WARNING);
	$notice->setTitle('Unable to Continue');
	switch ($follow) {
	case 'first':
	$notice->appendChild(
	"Unable to continue tracing the history of this file because ".
	"this commit is the first commit in the repository.");
	break;
	case 'created':
	$notice->appendChild(
	"Unable to continue tracing the history of this file because ".
	"this commit created the file.");
	break;
	}
	$content[] = $notice;
	}

	$renamed = $request->getStr('renamed');
	if ($renamed) {
	$notice = new AphrontErrorView();
	$notice->setSeverity(AphrontErrorView::SEVERITY_NOTICE);
	$notice->setTitle('File Renamed');
	$notice->appendChild(
	"File history passes through a rename from '".
	phutil_escape_html($drequest->getPath())."' to '".
	phutil_escape_html($renamed)."'.");
	$content[] = $notice;
	}

	$content[] = $view_select_panel;
	$content[] = $corpus;
	$content[] = $this->buildOpenRevisions();

	$nav = $this->buildSideNav('browse', true);
	$nav->appendChild($content);

	$basename = basename($this->getDiffusionRequest()->getPath());

	return $this->buildStandardPageResponse(
	$nav,
	array(
	'title' => $basename,
	));
	}

	private function buildCorpus($selected,
	DiffusionFileContentQuery $file_query,
	$needs_blame,
	DiffusionRequest $drequest,
	$path,
	$data) {

	if (ArcanistDiffUtils::isHeuristicBinaryFile($data)) {
	$file = $this->loadFileForData($path, $data);
	$file_uri = $file->getBestURI();

	if ($file->isViewableImage()) {
	$this->corpusType = 'image';
	return $this->buildImageCorpus($file_uri);
	} else {
	$this->corpusType = 'binary';
	return $this->buildBinaryCorpus($file_uri, $data);
	}
	}

	switch ($selected) {
	case 'plain':
	$style =
	"margin: 1em 2em; width: 90%; height: 80em; font-family: monospace";
	$corpus = phutil_render_tag(
	'textarea',
	array(
	'style' => $style,
	),
	phutil_escape_html($file_query->getRawData()));

	break;

	case 'plainblame':
	$style =
	"margin: 1em 2em; width: 90%; height: 80em; font-family: monospace";
	list($text_list, $rev_list, $blame_dict) =
	$file_query->getBlameData();

	$rows = array();
	foreach ($text_list as $k => $line) {
	$rev = $rev_list[$k];
	if (isset($blame_dict[$rev]['handle'])) {
	$author = $blame_dict[$rev]['handle']->getName();
	} else {
	$author = $blame_dict[$rev]['author'];
	}
	$rows[] =
	sprintf("%-10s %-20s %s", substr($rev, 0, 7), $author, $line);
	}

	$corpus = phutil_render_tag(
	'textarea',
	array(
	'style' => $style,
	),
	phutil_escape_html(implode("\n", $rows)));

	break;

	case 'highlighted':
	case 'blame':
	default:
	require_celerity_resource('syntax-highlighting-css');

	list($text_list, $rev_list, $blame_dict) = $file_query->getBlameData();

	$text_list = implode("\n", $text_list);
	$text_list = PhabricatorSyntaxHighlighter::highlightWithFilename(
	$path,
	$text_list);
	$text_list = explode("\n", $text_list);

	$rows = $this->buildDisplayRows($text_list, $rev_list, $blame_dict,
	$needs_blame, $drequest, $file_query, $selected);

	$id = celerity_generate_unique_node_id();

	$projects = $drequest->loadArcanistProjects();
	$langs = array();
	foreach ($projects as $project) {
	$ls = $project->getSymbolIndexLanguages();
	if (!$ls) {
	continue;
	}
	$dep_projects = $project->getSymbolIndexProjects();
	$dep_projects[] = $project->getPHID();
	foreach ($ls as $lang) {
	if (!isset($langs[$lang])) {
	$langs[$lang] = array();
	}
	$langs[$lang] += $dep_projects + array($project);
	}
	}

	$lang = last(explode('.', $drequest->getPath()));

	$prefs = $this->getRequest()->getUser()->loadPreferences();
	$pref_symbols = $prefs->getPreference(
	PhabricatorUserPreferences::PREFERENCE_DIFFUSION_SYMBOLS);
	if (isset($langs[$lang]) && $pref_symbols != 'disabled') {
	Javelin::initBehavior(
	'repository-crossreference',
	array(
	'container' => $id,
	'lang' => $lang,
	'projects' => $langs[$lang],
	));
	}

	$corpus_table = javelin_render_tag(
	'table',
	array(
	'class' => "diffusion-source remarkup-code PhabricatorMonospaced",
	'sigil' => 'diffusion-source',
	),
	implode("\n", $rows));
	$corpus = phutil_render_tag(
	'div',
	array(
	'style' => 'padding: 0 2em;',
	'id' => $id,
	),
	$corpus_table);

	break;
	}

	return $corpus;
	}

	private function renderViewSelectPanel($selected) {

	$request = $this->getRequest();

	$select = AphrontFormSelectControl::renderSelectTag(
	$selected,
	array(
	'highlighted' => 'View as Highlighted Text',
	'blame' => 'View as Highlighted Text with Blame',
	'plain' => 'View as Plain Text',
	'plainblame' => 'View as Plain Text with Blame',
	'raw' => 'View as raw document',
	),
	array(
	'name' => 'view',
	));

	$view_select_panel = new AphrontPanelView();
	$view_select_form = phabricator_render_form(
	$request->getUser(),
	array(
	'action' => $request->getRequestURI()->alter('view', null),
	'method' => 'post',
	'class' => 'diffusion-browse-type-form',
	),
	$select.
	' <button>View</button> '.
	$this->renderEditButton());

	$view_select_panel->appendChild($view_select_form);
	$view_select_panel->appendChild('<div style="clear: both;"></div>');

	return $view_select_panel;
	}

	private function renderEditButton() {
	$request = $this->getRequest();
	$user = $request->getUser();

	$drequest = $this->getDiffusionRequest();

	$repository = $drequest->getRepository();
	$path = $drequest->getPath();
	$line = nonempty((int)$drequest->getLine(), 1);

	$callsign = $repository->getCallsign();
	$editor_link = $user->loadEditorLink($path, $line, $callsign);
	if (!$editor_link) {
	return null;
	}

	return phutil_render_tag(
	'a',
	array(
	'href' => $editor_link,
	'class' => 'button',
	),
	'Edit');
	}

	private function buildDisplayRows(
	array $text_list,
	array $rev_list,
	array $blame_dict,
	$needs_blame,
	DiffusionRequest $drequest,
	DiffusionFileContentQuery $file_query,
	$selected) {

	if ($blame_dict) {
	$epoch_list = ipull(ifilter($blame_dict, 'epoch'), 'epoch');
	$epoch_min = min($epoch_list);
	$epoch_max = max($epoch_list);
	$epoch_range = ($epoch_max - $epoch_min) + 1;
	}

	$line_arr = array();
	$line_str = $drequest->getLine();
	$ranges = explode(',', $line_str);
	foreach ($ranges as $range) {
	if (strpos($range, '-') !== false) {
	list($min, $max) = explode('-', $range, 2);
	$line_arr[] = array(
	'min' => min($min, $max),
	'max' => max($min, $max),
	);
	} else if (strlen($range)) {
	$line_arr[] = array(
	'min' => $range,
	'max' => $range,
	);
	}
	}

	$display = array();

	$line_number = 1;
	$last_rev = null;
	$color = null;
	foreach ($text_list as $k => $line) {
	$display_line = array(
	'color' => null,
	'epoch' => null,
	'commit' => null,
	'author' => null,
	'target' => null,
	'highlighted' => null,
	'line' => $line_number,
	'data' => $line,
	);

	if ($needs_blame) {
	// If the line's rev is same as the line above, show empty content
	// with same color; otherwise generate blame info. The newer a change
	// is, the more saturated the color.

	// TODO: SVN doesn't always give us blame for the last line, if empty?
	// Bug with our stuff or with SVN?
	$rev = idx($rev_list, $k, $last_rev);

	if ($last_rev == $rev) {
	$display_line['color'] = $color;
	} else {
	$blame = $blame_dict[$rev];

	if (!isset($blame['epoch'])) {
	$color = '#ffd'; // Render as warning.
	} else {
	$color_ratio = ($blame['epoch'] - $epoch_min) / $epoch_range;
	$color_value = 0xF6 * (1.0 - $color_ratio);
	$color = sprintf(
	'#%02x%02x%02x',
	$color_value,
	0xF6,
	$color_value);
	}

	$display_line['epoch'] = idx($blame, 'epoch');
	$display_line['color'] = $color;
	$display_line['commit'] = $rev;

	if (isset($blame['handle'])) {
	$author_link = $blame['handle']->renderLink();
	} else {
	$author_link = phutil_render_tag(
	'span',
	array(
	),
	phutil_escape_html($blame['author']));
	}
	$display_line['author'] = $author_link;

	$last_rev = $rev;
	}
	}

	if ($line_arr) {
	if ($line_number == $line_arr[0]['min']) {
	$display_line['target'] = true;
	}
	foreach ($line_arr as $range) {
	if ($line_number >= $range['min'] &&
	$line_number <= $range['max']) {
	$display_line['highlighted'] = true;
	}
	}
	}

	$display[] = $display_line;
	++$line_number;
	}

	$commits = array_filter(ipull($display, 'commit'));
	if ($commits) {
	$commits = id(new PhabricatorAuditCommitQuery())
	->withIdentifiers($drequest->getRepository()->getID(), $commits)
	->needCommitData(true)
	->execute();
	$commits = mpull($commits, null, 'getCommitIdentifier');
	}

	$revision_ids = id(new DifferentialRevision())
	->loadIDsByCommitPHIDs(mpull($commits, 'getPHID'));
	$revisions = array();
	if ($revision_ids) {
	$revisions = id(new DifferentialRevision())->loadAllWhere(
	'id IN (%Ld)',
	$revision_ids);
	}

	$request = $this->getRequest();
	$user = $request->getUser();

	Javelin::initBehavior('phabricator-oncopy', array());

	$rows = array();
	foreach ($display as $line) {

	$line_href = $drequest->generateURI(
	array(
	'action' => 'browse',
	'line' => $line['line'],
	'stable' => true,
	+ 'params' => array('view' => 'blame'),
	));

	$blame = array();
	if ($line['color']) {
	$color = $line['color'];

	$before_link = null;
	$commit_link = null;
	$revision_link = null;
	if (idx($line, 'commit')) {
	$commit = $line['commit'];

	$summary = 'Unknown';
	if (idx($commits, $commit)) {
	$summary = $commits[$commit]->getCommitData()->getSummary();
	}

	$tooltip = phabricator_date(
	$line['epoch'],
	$user)." \xC2\xB7 ".$summary;

	Javelin::initBehavior('phabricator-tooltips', array());
	require_celerity_resource('aphront-tooltip-css');

	$commit_link = javelin_render_tag(
	'a',
	array(
	'href' => $drequest->generateURI(
	array(
	'action' => 'commit',
	'commit' => $line['commit'],
	)),
	'sigil' => 'has-tooltip',
	'meta' => array(
	'tip' => $tooltip,
	'align' => 'E',
	'size' => 600,
	),
	),
	phutil_escape_html(phutil_utf8_shorten($line['commit'], 9, '')));

	$revision_id = null;
	if (idx($commits, $commit)) {
	$revision_id = idx($revision_ids, $commits[$commit]->getPHID());
	}

	if ($revision_id) {
	$revision = idx($revisions, $revision_id);
	if (!$revision) {
	$tooltip = '(Invalid revision)';
	} else {
	$tooltip =
	phabricator_date($revision->getDateModified(), $user).
	" \xC2\xB7 ".
	$revision->getTitle();
	}
	$revision_link = javelin_render_tag(
	'a',
	array(
	'href' => '/D'.$revision_id,
	'sigil' => 'has-tooltip',
	'meta' => array(
	'tip' => $tooltip,
	'align' => 'E',
	'size' => 600,
	),
	),
	'D'.$revision_id);
	}

	$before_link = javelin_render_tag(
	'a',
	array(
	'href' => $line_href->alter('before', $commit),
	'sigil' => 'has-tooltip',
	'meta' => array(
	'tip' => 'Skip Past This Commit',
	'align' => 'E',
	'size' => 300,
	),
	),
	"\xC2\xAB");
	}

	$blame[] = phutil_render_tag(
	'th',
	array(
	'class' => 'diffusion-blame-link',
	'style' => 'background: '.$color,
	),
	$before_link);

	$blame[] = phutil_render_tag(
	'th',
	array(
	'class' => 'diffusion-rev-link',
	'style' => 'background: '.$color,
	),
	$commit_link);

	$blame[] = phutil_render_tag(
	'th',
	array(
	'class' => 'diffusion-rev-link',
	'style' => 'background: '.$color,
	),
	$revision_link);

	$blame[] = phutil_render_tag(
	'th',
	array(
	'class' => 'diffusion-author-link',
	'style' => 'background: '.$color,
	),
	idx($line, 'author'));
	}

	$line_link = phutil_render_tag(
	'a',
	array(
	'href' => $line_href,
	),
	phutil_escape_html($line['line']));

	$blame[] = javelin_render_tag(
	'th',
	array(
	'class' => 'diffusion-line-link',
	'sigil' => 'diffusion-line-link',
	'style' => isset($color) ? 'background: '.$color : null,
	),
	$line_link);

	Javelin::initBehavior('diffusion-line-linker');

	$blame = implode('', $blame);

	if ($line['target']) {
	Javelin::initBehavior(
	'diffusion-jump-to',
	array(
	'target' => 'scroll_target',
	));
	$anchor_text = '<a id="scroll_target"></a>';
	} else {
	$anchor_text = null;
	}

	$line_text = phutil_render_tag(
	'td',
	array(
	),
	$anchor_text.
	"\xE2\x80\x8B". // NOTE: See phabricator-oncopy behavior.
	$line['data']);

	$rows[] = phutil_render_tag(
	'tr',
	array(
	'class' => ($line['highlighted'] ? 'highlighted' : null),
	),
	$blame.
	$line_text);
	}

	return $rows;
	}


	private static function renderRevision(DiffusionRequest $drequest,
	$revision) {

	$callsign = $drequest->getCallsign();

	$name = 'r'.$callsign.$revision;
	return phutil_render_tag(
	'a',
	array(
	'href' => '/'.$name,
	),
	$name
	);
	}


	private static function renderBrowse(
	DiffusionRequest $drequest,
	$path,
	$name = null,
	$rev = null,
	$line = null,
	$view = null,
	$title = null) {

	$callsign = $drequest->getCallsign();

	if ($name === null) {
	$name = $path;
	}

	$at = null;
	if ($rev) {
	$at = ';'.$rev;
	}

	if ($view) {
	$view = '?view='.$view;
	}

	if ($line) {
	$line = '$'.$line;
	}

	return phutil_render_tag(
	'a',
	array(
	'href' => "/diffusion/{$callsign}/browse/{$path}{$at}{$line}{$view}",
	'title' => $title,
	),
	$name
	);
	}

	private function loadFileForData($path, $data) {
	return PhabricatorFile::buildFromFileDataOrHash(
	$data,
	array(
	'name' => basename($path),
	));
	}

	private function buildRawResponse($path, $data) {
	$file = $this->loadFileForData($path, $data);
	return id(new AphrontRedirectResponse())->setURI($file->getBestURI());
	}

	private function buildImageCorpus($file_uri) {
	$panel = new AphrontPanelView();
	$panel->setHeader('Image');
	$panel->addButton($this->renderEditButton());
	$panel->appendChild(
	phutil_render_tag(
	'img',
	array(
	'src' => $file_uri,
	)));
	return $panel;
	}

	private function buildBinaryCorpus($file_uri, $data) {
	$panel = new AphrontPanelView();
	$panel->setHeader('Binary File');
	$panel->addButton($this->renderEditButton());
	$panel->appendChild(
	'<p>'.
	'This is a binary file. '.
	'It is '.number_format(strlen($data)).' bytes in length.'.
	'</p>');
	$panel->addButton(
	phutil_render_tag(
	'a',
	array(
	'href' => $file_uri,
	'class' => 'button green',
	),
	'Download Binary File...'));
	return $panel;
	}

	private function buildBeforeResponse($before) {
	$request = $this->getRequest();
	$drequest = $this->getDiffusionRequest();

	// NOTE: We need to get the grandparent so we can capture filename changes
	// in the parent.

	$parent = $this->loadParentRevisionOf($before);
	$old_filename = null;
	$was_created = false;
	if ($parent) {
	$grandparent = $this->loadParentRevisionOf(
	$parent->getCommitIdentifier());

	if ($grandparent) {
	$rename_query = DiffusionRenameHistoryQuery::newFromDiffusionRequest(
	$drequest);
	$rename_query->setOldCommit($grandparent->getCommitIdentifier());
	$old_filename = $rename_query->loadOldFilename();
	$was_created = $rename_query->getWasCreated();
	}
	}

	$follow = null;
	if ($was_created) {
	// If the file was created in history, that means older commits won't
	// have it. Since we know it existed at 'before', it must have been
	// created then; jump there.
	$target_commit = $before;
	$follow = 'created';
	} else if ($parent) {
	// If we found a parent, jump to it. This is the normal case.
	$target_commit = $parent->getCommitIdentifier();
	} else {
	// If there's no parent, this was probably created in the initial commit?
	// And the "was_created" check will fail because we can't identify the
	// grandparent. Keep the user at 'before'.
	$target_commit = $before;
	$follow = 'first';
	}

	$path = $drequest->getPath();
	$renamed = null;
	if ($old_filename !== null &&
	$old_filename !== $path) {
	$renamed = $path;
	$path = $old_filename;
	}

	$line = null;
	// If there's a follow error, drop the line so the user sees the message.
	if (!$follow) {
	$line = $this->getBeforeLineNumber($target_commit);
	}

	$before_uri = $drequest->generateURI(
	array(
	'action' => 'browse',
	'commit' => $target_commit,
	'line' => $line,
	'path' => $path,
	));

	$before_uri->setQueryParams($request->getRequestURI()->getQueryParams());
	$before_uri = $before_uri->alter('before', null);
	$before_uri = $before_uri->alter('renamed', $renamed);
	$before_uri = $before_uri->alter('follow', $follow);

	return id(new AphrontRedirectResponse())->setURI($before_uri);
	}

	private function getBeforeLineNumber($target_commit) {
	$drequest = $this->getDiffusionRequest();

	$line = $drequest->getLine();
	if (!$line) {
	return null;
	}

	$diff_query = DiffusionRawDiffQuery::newFromDiffusionRequest($drequest);
	$diff_query->setAgainstCommit($target_commit);
	try {
	$raw_diff = $diff_query->loadRawDiff();
	$old_line = 0;
	$new_line = 0;

	foreach (explode("\n", $raw_diff) as $text) {
	if ($text[0] == '-' \|\| $text[0] == ' ') {
	$old_line++;
	}
	if ($text[0] == '+' \|\| $text[0] == ' ') {
	$new_line++;
	}
	if ($new_line == $line) {
	return $old_line;
	}
	}

	// We didn't find the target line.
	return $line;

	} catch (Exception $ex) {
	return $line;
	}
	}

	private function loadParentRevisionOf($commit) {
	$drequest = $this->getDiffusionRequest();

	$before_req = DiffusionRequest::newFromDictionary(
	array(
	'repository' => $drequest->getRepository(),
	'commit' => $commit,
	));

	$query = DiffusionCommitParentsQuery::newFromDiffusionRequest($before_req);
	$parents = $query->loadParents();

	return head($parents);
	}

	}

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