appblocks
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A lightweight javascript library for building micro apps for the front-end.
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<h1><a href="index.html">All files</a> placeholders.js</h1>
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<span class="cline-any cline-neutral"> </span></td><td class="text"><pre class="prettyprint lang-js">'use strict';
import "core-js/modules/es.symbol.js";
import "core-js/modules/es.symbol.description.js";
import "core-js/modules/es.symbol.iterator.js";
import "core-js/modules/es.array.filter.js";
import "core-js/modules/es.array.for-each.js";
import "core-js/modules/es.array.includes.js";
import "core-js/modules/es.array.iterator.js";
import "core-js/modules/es.array.map.js";
import "core-js/modules/es.object.to-string.js";
import "core-js/modules/es.regexp.exec.js";
import "core-js/modules/es.string.includes.js";
import "core-js/modules/es.string.iterator.js";
import "core-js/modules/es.string.replace.js";
import "core-js/modules/es.string.trim.js";
import "core-js/modules/web.dom-collections.for-each.js";
import "core-js/modules/web.dom-collections.iterator.js";
/* istanbul ignore next */
function _typeof(o) { "@babel/helpers - typeof"; return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (o) { return typeof o; } : function (o) { return o && "function" == typeof Symbol && o.constructor === Symbol && o !== Symbol.prototype ? "symbol" : typeof o; }, _typeof(o); }
import { getProp } from './utils';
import { applyCustomFilter } from './filters';
import { buildDelimiterRegex, evaluateTemplateExpression } from './helpers';
// Returns the value of a placeholder.
var getPlaceholderVal = function getPlaceholderVal(comp, placeholder, pointers) {
// if ( /{([^}]+)}/.test(placeholder) === false ) return;
if (_typeof(pointers) === 'object' && pointers !== null) {}
// placeholder is the inner content (without delimiters), may contain property path and filters already removed
var placeholderName = placeholder;
var propKeys = placeholderName.split('.');
var result = getProp(comp, propKeys, pointers);
// Return empty text instead of undefined.
<span class="missing-if-branch" title="if path not taken" >I</span>if (result === undefined) <span class="cstat-no" title="statement not covered" >return '';</span>
return result;
};
// Replaces all placeholders in all attributes in a node.
export var updateAttributePlaceholders = function updateAttributePlaceholders(comp, node, pointers, cache) {
var attrs = node.attributes;
var regex = buildDelimiterRegex(comp.delimiters);
for (var i = 0; i < attrs.length; i++) {
var attrValue = attrs[i].value;
attrValue = attrValue.replace(regex, function (fullMatch, inner) {
return evaluateTemplateExpression(comp, pointers, node, inner, cache);
});
attrs[i].value = attrValue;
}
};
// Updates all the text nodes that contain placeholders `{}` and applies filters (if any).
export var updateTextNodePlaceholders = function updateTextNodePlaceholders(comp, nodeTree, pointers, cache) {
var textWalker = document.createTreeWalker(nodeTree, NodeFilter.SHOW_TEXT, null, false);
var nodesToProcess = [];
while (textWalker.nextNode()) {
nodesToProcess.push(textWalker.currentNode);
}
// Build delimiter-aware regex
var regex = buildDelimiterRegex(comp.delimiters);
nodesToProcess.forEach(function (node) {
var nodeVal = node.nodeValue;
var hasReplacedWithHTML = false;
nodeVal = nodeVal.replace(regex, function (fullMatch, inner) {
var parts = inner.split('|').map(function (p) {
return p.trim();
}).filter(Boolean);
var propName = parts.shift();
var filterList = parts;
var placeholderVal;
if (filterList.includes('asHTML')) {
placeholderVal = getPlaceholderVal(comp, propName, pointers);
filterList.forEach(function (filter) {
if (filter === 'asHTML') {
hasReplacedWithHTML = true;
} else {
placeholderVal = applyCustomFilter(comp, placeholderVal, filter);
}
});
} else {
placeholderVal = evaluateTemplateExpression(comp, pointers, node, inner, cache);
}
if (filterList.includes('asHTML')) {
// Replace the node with HTML fragment
var docFrag = document.createRange().createContextualFragment(placeholderVal);
node.parentNode.insertBefore(docFrag, node);
node.parentNode.removeChild(node);
hasReplacedWithHTML = true;
return '';
}
return placeholderVal;
});
// Update the node value only if it hasn't been replaced by HTML
if (!hasReplacedWithHTML && node.parentNode) {
node.nodeValue = nodeVal;
}
});
};</pre></td></tr></table></pre>
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