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phorge/webroot/rsrc/js/core/behavior-line-linker.js
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behavior-line-linker.js
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/**
* @provides javelin-behavior-phabricator-line-linker
* @requires javelin-behavior
* javelin-stratcom
* javelin-dom
* javelin-history
*/
JX.behavior('phabricator-line-linker', function() {
var origin = null;
var target = null;
var root = null;
var highlighted = null;
var editor_link = null;
try {
editor_link = JX.$('editor_link');
} catch (ex) {
// Ignore.
}
function getRowNumber(th) {
// If the "<th />" tag contains an "<a />" with "data-n" that we're using
// to prevent copy/paste of line numbers, use that.
if (th.firstChild) {
var line = th.firstChild.getAttribute('data-n');
if (line) {
return line;
}
}
return null;
}
JX.Stratcom.listen(
['click', 'mousedown'],
['phabricator-source', 'tag:th', 'tag:a'],
function(e) {
if (!e.isNormalMouseEvent()) {
return;
}
// Make sure the link we clicked is actually a line number in a source
// table, not some kind of link in some element embedded inside the
// table. The row's immediate ancestor table needs to be the table with
// the "phabricator-source" sigil.
var cell = e.getNode('tag:th');
var table = e.getNode('phabricator-source');
if (JX.DOM.findAbove(cell, 'table') !== table) {
return;
}
var number = getRowNumber(cell);
if (!number) {
return;
}
e.kill();
// If this is a click event, kill it. We handle mousedown and mouseup
// instead.
if (e.getType() === 'click') {
return;
}
origin = cell;
target = origin;
root = table;
});
var highlight = function(e) {
if (!origin) {
return;
}
if (e.getNode('phabricator-source') !== root) {
return;
}
target = e.getNode('tag:th');
var min;
var max;
// NOTE: We're using position to figure out which order these rows are in,
// not row numbers. We do this because Harbormaster build logs may have
// multiple rows with the same row number.
if (JX.$V(origin).y <= JX.$V(target).y) {
min = origin;
max = target;
} else {
min = target;
max = origin;
}
// If we haven't changed highlighting, we don't have a list of highlighted
// nodes yet. Assume every row is highlighted.
var ii;
if (highlighted === null) {
highlighted = [];
var rows = JX.DOM.scry(root, 'tr');
for (ii = 0; ii < rows.length; ii++) {
highlighted.push(rows[ii]);
}
}
// Unhighlight any existing highlighted rows.
for (ii = 0; ii < highlighted.length; ii++) {
JX.DOM.alterClass(highlighted[ii], 'phabricator-source-highlight', false);
}
highlighted = [];
// Highlight the newly selected rows.
min = JX.DOM.findAbove(min, 'tr');
max = JX.DOM.findAbove(max, 'tr');
var cursor = min;
while (true) {
JX.DOM.alterClass(cursor, 'phabricator-source-highlight', true);
highlighted.push(cursor);
if (cursor === max) {
break;
}
cursor = cursor.nextSibling;
}
};
JX.Stratcom.listen('mouseover', 'phabricator-source', highlight);
JX.Stratcom.listen(
'mouseup',
null,
function(e) {
if (!origin) {
return;
}
highlight(e);
e.kill();
var o = getRowNumber(origin);
var t = getRowNumber(target);
var uri = JX.Stratcom.getData(root).uri;
var path;
if (!uri) {
uri = JX.$U(window.location);
path = uri.getPath();
path = path.replace(/\$[\d-]+$/, '');
uri.setPath(path);
uri = uri.toString();
}
origin = null;
target = null;
root = null;
var lines = (o == t ? o : Math.min(o, t) + '-' + Math.max(o, t));
uri = JX.$U(uri);
path = uri.getPath();
path = path + '$' + lines;
uri = uri.setPath(path).toString();
JX.History.replace(uri);
if (editor_link) {
if (editor_link.href) {
var editdata = JX.Stratcom.getData(editor_link);
editor_link.href = editdata.link_template.replace('%25l', o);
}
}
});
// Try to jump to the highlighted lines if we don't have an explicit anchor
// in the URI.
if (!window.location.hash.length) {
try {
var anchor = JX.$('phabricator-line-linker-anchor');
JX.DOM.scrollToPosition(0, JX.$V(anchor).y - 60);
} catch (ex) {
// If we didn't hit an element on the page, just move on.
}
}
});

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