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/*!
* PostCSS RFS plugin
*
* Automated responsive values for font sizes, paddings, margins and much more
*
* Licensed under MIT (https://github.com/twbs/rfs/blob/main/LICENSE)
*/
'use strict';
const postcss = require('postcss');
const RfsClass = require('./lib/rfs.js');
const DISABLE_RFS_SELECTOR = '.disable-rfs';
const ENABLE_RFS_SELECTOR = '.enable-rfs';
module.exports = (opts = {}) => {
const rfs = new RfsClass(opts);
// Get the merged options
opts = rfs.getOptions();
const mediaQuery = rfs.renderMediaQuery();
return css => {
css.walkRules(rule => {
const mediaQueryRules = [];
const extraBlocks = [];
const { parent } = rule;
let removeRule = false;
let dcRule;
let ecRule;
let ruleSelector = rule.selector;
// Prepare rule to add to media query
if (opts.class === 'enable') {
const selectors = rule.selector.split(',');
let tempRuleSelector = '';
for (const selector of selectors) {
tempRuleSelector += `${ENABLE_RFS_SELECTOR} ${selector},\n`;
tempRuleSelector += `${selector + ENABLE_RFS_SELECTOR},\n`;
}
ruleSelector = tempRuleSelector.slice(0, -2);
}
const fluidRule = postcss.rule({
selector: ruleSelector
});
// Disable classes
if (opts.class === 'disable') {
const selectors = rule.selector.split(',');
let ruleSelector = '';
for (const selector of selectors) {
ruleSelector += opts.mode === 'max-media-query' ? `${selector},\n` : '';
ruleSelector += `${DISABLE_RFS_SELECTOR} ${selector},\n`;
ruleSelector += `${selector + DISABLE_RFS_SELECTOR},\n`;
}
ruleSelector = ruleSelector.slice(0, -2);
dcRule = postcss.rule({
selector: ruleSelector,
source: rule.source
});
}
rule.walkDecls(decl => {
// Check if the selector doesn't contain the disabled selector
// and if the value contains the rfs() function
const check = !rule.selector.includes(DISABLE_RFS_SELECTOR) &&
new RegExp(`${opts.functionName}(.*)`, 'g').test(decl.value);
if (!check) {
return;
}
const value = rfs.value(decl.value);
const fluidValue = rfs.fluidValue(decl.value);
decl.value = value;
if (value !== fluidValue) {
const defaultValue = opts.mode === 'min-media-query' ? (opts.class === 'enable' ? value : fluidValue) : value;
const mediaQueryValue = opts.mode === 'min-media-query' ? value : fluidValue;
decl.value = defaultValue;
fluidRule.append(decl.clone({ value: mediaQueryValue }));
mediaQueryRules.push(fluidRule);
// Disable classes
if (opts.class === 'disable') {
const declOpts = opts.mode === 'max-media-query' ? {} : { value };
dcRule.append(decl.clone(declOpts));
extraBlocks.push(dcRule);
} else if (opts.class === 'enable' && opts.mode === 'min-media-query') {
if (ecRule === undefined) {
ecRule = postcss.rule({
selector: ruleSelector,
source: parent.source
});
}
ecRule.append(decl.clone({ value: fluidValue }));
extraBlocks.push(ecRule);
}
// Remove declaration if needed
if (opts.class === 'disable' && opts.mode === 'max-media-query') {
if (decl.prev() || decl.next()) {
decl.remove();
} else {
removeRule = true;
}
}
}
});
if (mediaQueryRules.length === 0) {
return;
}
// Safari iframe resize bug: https://github.com/twbs/rfs/issues/14
if (opts.safariIframeResizeBugFix) {
rule.append({
prop: 'min-width',
value: '0vw'
});
}
const fluidMediaQuery = mediaQuery.clone();
for (const mediaQueryRule of mediaQueryRules) {
fluidMediaQuery.append(mediaQueryRule);
}
parent.insertAfter(rule, fluidMediaQuery);
if (extraBlocks.length > 0) {
for (const disableBlock of extraBlocks) {
parent.insertAfter(rule, disableBlock);
}
}
if (removeRule) {
rule.remove();
}
});
};
};
module.exports.postcss = true;
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