d2-ui
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JavaScript
/**
* Copyright 2013-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*
* @providesModule Danger
*/
;
var DOMLazyTree = require('./DOMLazyTree');
var ExecutionEnvironment = require('fbjs/lib/ExecutionEnvironment');
var createNodesFromMarkup = require('fbjs/lib/createNodesFromMarkup');
var emptyFunction = require('fbjs/lib/emptyFunction');
var getMarkupWrap = require('fbjs/lib/getMarkupWrap');
var invariant = require('fbjs/lib/invariant');
var OPEN_TAG_NAME_EXP = /^(<[^ \/>]+)/;
var RESULT_INDEX_ATTR = 'data-danger-index';
/**
* Extracts the `nodeName` from a string of markup.
*
* NOTE: Extracting the `nodeName` does not require a regular expression match
* because we make assumptions about React-generated markup (i.e. there are no
* spaces surrounding the opening tag and there is at least one attribute).
*
* @param {string} markup String of markup.
* @return {string} Node name of the supplied markup.
* @see http://jsperf.com/extract-nodename
*/
function getNodeName(markup) {
return markup.substring(1, markup.indexOf(' '));
}
var Danger = {
/**
* Renders markup into an array of nodes. The markup is expected to render
* into a list of root nodes. Also, the length of `resultList` and
* `markupList` should be the same.
*
* @param {array<string>} markupList List of markup strings to render.
* @return {array<DOMElement>} List of rendered nodes.
* @internal
*/
dangerouslyRenderMarkup: function (markupList) {
!ExecutionEnvironment.canUseDOM ? process.env.NODE_ENV !== 'production' ? invariant(false, 'dangerouslyRenderMarkup(...): Cannot render markup in a worker ' + 'thread. Make sure `window` and `document` are available globally ' + 'before requiring React when unit testing or use ' + 'ReactDOMServer.renderToString for server rendering.') : invariant(false) : void 0;
var nodeName;
var markupByNodeName = {};
// Group markup by `nodeName` if a wrap is necessary, else by '*'.
for (var i = 0; i < markupList.length; i++) {
!markupList[i] ? process.env.NODE_ENV !== 'production' ? invariant(false, 'dangerouslyRenderMarkup(...): Missing markup.') : invariant(false) : void 0;
nodeName = getNodeName(markupList[i]);
nodeName = getMarkupWrap(nodeName) ? nodeName : '*';
markupByNodeName[nodeName] = markupByNodeName[nodeName] || [];
markupByNodeName[nodeName][i] = markupList[i];
}
var resultList = [];
var resultListAssignmentCount = 0;
for (nodeName in markupByNodeName) {
if (!markupByNodeName.hasOwnProperty(nodeName)) {
continue;
}
var markupListByNodeName = markupByNodeName[nodeName];
// This for-in loop skips the holes of the sparse array. The order of
// iteration should follow the order of assignment, which happens to match
// numerical index order, but we don't rely on that.
var resultIndex;
for (resultIndex in markupListByNodeName) {
if (markupListByNodeName.hasOwnProperty(resultIndex)) {
var markup = markupListByNodeName[resultIndex];
// Push the requested markup with an additional RESULT_INDEX_ATTR
// attribute. If the markup does not start with a < character, it
// will be discarded below (with an appropriate console.error).
markupListByNodeName[resultIndex] = markup.replace(OPEN_TAG_NAME_EXP,
// This index will be parsed back out below.
'$1 ' + RESULT_INDEX_ATTR + '="' + resultIndex + '" ');
}
}
// Render each group of markup with similar wrapping `nodeName`.
var renderNodes = createNodesFromMarkup(markupListByNodeName.join(''), emptyFunction // Do nothing special with <script> tags.
);
for (var j = 0; j < renderNodes.length; ++j) {
var renderNode = renderNodes[j];
if (renderNode.hasAttribute && renderNode.hasAttribute(RESULT_INDEX_ATTR)) {
resultIndex = +renderNode.getAttribute(RESULT_INDEX_ATTR);
renderNode.removeAttribute(RESULT_INDEX_ATTR);
!!resultList.hasOwnProperty(resultIndex) ? process.env.NODE_ENV !== 'production' ? invariant(false, 'Danger: Assigning to an already-occupied result index.') : invariant(false) : void 0;
resultList[resultIndex] = renderNode;
// This should match resultList.length and markupList.length when
// we're done.
resultListAssignmentCount += 1;
} else if (process.env.NODE_ENV !== 'production') {
console.error('Danger: Discarding unexpected node:', renderNode);
}
}
}
// Although resultList was populated out of order, it should now be a dense
// array.
!(resultListAssignmentCount === resultList.length) ? process.env.NODE_ENV !== 'production' ? invariant(false, 'Danger: Did not assign to every index of resultList.') : invariant(false) : void 0;
!(resultList.length === markupList.length) ? process.env.NODE_ENV !== 'production' ? invariant(false, 'Danger: Expected markup to render %s nodes, but rendered %s.', markupList.length, resultList.length) : invariant(false) : void 0;
return resultList;
},
/**
* Replaces a node with a string of markup at its current position within its
* parent. The markup must render into a single root node.
*
* @param {DOMElement} oldChild Child node to replace.
* @param {string} markup Markup to render in place of the child node.
* @internal
*/
dangerouslyReplaceNodeWithMarkup: function (oldChild, markup) {
!ExecutionEnvironment.canUseDOM ? process.env.NODE_ENV !== 'production' ? invariant(false, 'dangerouslyReplaceNodeWithMarkup(...): Cannot render markup in a ' + 'worker thread. Make sure `window` and `document` are available ' + 'globally before requiring React when unit testing or use ' + 'ReactDOMServer.renderToString() for server rendering.') : invariant(false) : void 0;
!markup ? process.env.NODE_ENV !== 'production' ? invariant(false, 'dangerouslyReplaceNodeWithMarkup(...): Missing markup.') : invariant(false) : void 0;
!(oldChild.nodeName !== 'HTML') ? process.env.NODE_ENV !== 'production' ? invariant(false, 'dangerouslyReplaceNodeWithMarkup(...): Cannot replace markup of the ' + '<html> node. This is because browser quirks make this unreliable ' + 'and/or slow. If you want to render to the root you must use ' + 'server rendering. See ReactDOMServer.renderToString().') : invariant(false) : void 0;
if (typeof markup === 'string') {
var newChild = createNodesFromMarkup(markup, emptyFunction)[0];
oldChild.parentNode.replaceChild(newChild, oldChild);
} else {
DOMLazyTree.replaceChildWithTree(oldChild, markup);
}
}
};
module.exports = Danger;