tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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FontSize.js (2402B)

      1 /* This Source Code Form is subject to the terms of the Mozilla Public
      2 * License, v. 2.0. If a copy of the MPL was not distributed with this
      3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      4 
      5 "use strict";
      6 
      7 const {
      8  createFactory,
      9  PureComponent,
     10 } = require("resource://devtools/client/shared/vendor/react.mjs");
     11 const PropTypes = require("resource://devtools/client/shared/vendor/react-prop-types.mjs");
     12 
     13 const FontPropertyValue = createFactory(
     14  require("resource://devtools/client/inspector/fonts/components/FontPropertyValue.js")
     15 );
     16 
     17 const {
     18  getStr,
     19 } = require("resource://devtools/client/inspector/fonts/utils/l10n.js");
     20 const {
     21  getUnitFromValue,
     22  getStepForUnit,
     23 } = require("resource://devtools/client/inspector/fonts/utils/font-utils.js");
     24 
     25 class FontSize extends PureComponent {
     26  static get propTypes() {
     27    return {
     28      disabled: PropTypes.bool.isRequired,
     29      onChange: PropTypes.func.isRequired,
     30      value: PropTypes.string.isRequired,
     31    };
     32  }
     33 
     34  constructor(props) {
     35    super(props);
     36    this.historicMax = {};
     37  }
     38 
     39  render() {
     40    const value = parseFloat(this.props.value);
     41    const unit = getUnitFromValue(this.props.value);
     42    let max;
     43    switch (unit) {
     44      case "em":
     45      case "rem":
     46        max = 4;
     47        break;
     48      case "vh":
     49      case "vw":
     50      case "vmin":
     51      case "vmax":
     52        max = 10;
     53        break;
     54      case "%":
     55        max = 200;
     56        break;
     57      default:
     58        max = 72;
     59        break;
     60    }
     61 
     62    // Allow the upper bound to increase so it accomodates the out-of-bounds value.
     63    max = Math.max(max, value);
     64    // Ensure we store the max value ever reached for this unit type. This will be the
     65    // max value of the input and slider. Without this memoization, the value and slider
     66    // thumb get clamped at the upper bound while decrementing an out-of-bounds value.
     67    this.historicMax[unit] = this.historicMax[unit]
     68      ? Math.max(this.historicMax[unit], max)
     69      : max;
     70 
     71    return FontPropertyValue({
     72      allowOverflow: true,
     73      disabled: this.props.disabled,
     74      label: getStr("fontinspector.fontSizeLabel"),
     75      min: 0,
     76      max: this.historicMax[unit],
     77      name: "font-size",
     78      onChange: this.props.onChange,
     79      step: getStepForUnit(unit),
     80      unit,
     81      unitOptions: ["em", "rem", "%", "px", "pt", "vh", "vw"],
     82      value,
     83    });
     84  }
     85 }
     86 
     87 module.exports = FontSize;