tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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FontPreview.js (3614B)

      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 const {
      7  gDevTools,
      8 } = require("resource://devtools/client/framework/devtools.js");
      9 const {
     10  Component,
     11 } = require("resource://devtools/client/shared/vendor/react.mjs");
     12 const PropTypes = require("resource://devtools/client/shared/vendor/react-prop-types.mjs");
     13 const {
     14  L10N,
     15 } = require("resource://devtools/client/netmonitor/src/utils/l10n.js");
     16 
     17 const {
     18  div,
     19  img,
     20 } = require("resource://devtools/client/shared/vendor/react-dom-factories.js");
     21 
     22 const {
     23  getCssVariableColor,
     24 } = require("resource://devtools/client/shared/theme.js");
     25 
     26 const FONT_NAME = L10N.getStr("netmonitor.response.name");
     27 const FONT_MIME_TYPE = L10N.getStr("netmonitor.response.mime");
     28 const FONT_PREVIEW_FAILED = L10N.getStr(
     29  "netmonitor.response.fontPreviewFailed"
     30 );
     31 
     32 const FONT_PREVIEW_TEXT =
     33  "ABCDEFGHIJKLM\nNOPQRSTUVWXYZ\nabcdefghijklm\nnopqrstuvwxyz\n0123456789";
     34 
     35 class FontPreview extends Component {
     36  static get propTypes() {
     37    return {
     38      connector: PropTypes.object.isRequired,
     39      mimeType: PropTypes.string,
     40      url: PropTypes.string,
     41    };
     42  }
     43 
     44  constructor(props) {
     45    super(props);
     46 
     47    this.state = {
     48      name: "",
     49      dataURL: "",
     50    };
     51 
     52    this.onThemeChanged = this.onThemeChanged.bind(this);
     53  }
     54 
     55  componentDidMount() {
     56    this.getPreview();
     57 
     58    // Listen for theme changes as the color of the preview depends on the theme
     59    gDevTools.on("theme-switched", this.onThemeChanged);
     60  }
     61 
     62  componentDidUpdate(prevProps) {
     63    const { url } = this.props;
     64    if (prevProps.url !== url) {
     65      this.getPreview();
     66    }
     67  }
     68 
     69  componentWillUnmount() {
     70    gDevTools.off("theme-switched", this.onThemeChanged);
     71  }
     72 
     73  /**
     74   * Handler for the "theme-switched" event.
     75   */
     76  onThemeChanged(frame) {
     77    if (frame === window) {
     78      this.getPreview();
     79    }
     80  }
     81 
     82  /**
     83   * Generate the font preview and receives information about the font.
     84   */
     85  async getPreview() {
     86    const { connector } = this.props;
     87 
     88    const toolbox = connector.getToolbox();
     89    const inspectorFront = await toolbox.target.getFront("inspector");
     90    const { pageStyle } = inspectorFront;
     91    const pageFontFaces = await pageStyle.getAllUsedFontFaces({
     92      includePreviews: true,
     93      includeVariations: false,
     94      previewText: FONT_PREVIEW_TEXT,
     95      previewFillStyle: getCssVariableColor("--theme-body-color", toolbox.win),
     96    });
     97 
     98    const fontFace = pageFontFaces.find(
     99      pageFontFace => pageFontFace.URI === this.props.url
    100    );
    101 
    102    this.setState({
    103      name: fontFace?.name ?? "",
    104      dataURL: (await fontFace?.preview.data.string()) ?? "",
    105    });
    106  }
    107 
    108  render() {
    109    const { mimeType } = this.props;
    110    const { name, dataURL } = this.state;
    111 
    112    if (dataURL === "") {
    113      return div({ className: "empty-notice" }, FONT_PREVIEW_FAILED);
    114    }
    115 
    116    return div(
    117      { className: "panel-container response-font-box devtools-monospace" },
    118      img({
    119        className: "response-font",
    120        src: dataURL,
    121        alt: "",
    122      }),
    123      div(
    124        { className: "response-summary" },
    125        div({ className: "tabpanel-summary-label" }, FONT_NAME),
    126        div({ className: "tabpanel-summary-value" }, name)
    127      ),
    128      div(
    129        { className: "response-summary" },
    130        div({ className: "tabpanel-summary-label" }, FONT_MIME_TYPE),
    131        div({ className: "tabpanel-summary-value" }, mimeType)
    132      )
    133    );
    134  }
    135 }
    136 
    137 module.exports = FontPreview;