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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
"use strict";
const {
gDevTools,
const {
Component,
const {
L10N,
const {
div,
img,
const FONT_NAME = L10N.getStr("netmonitor.response.name");
const FONT_MIME_TYPE = L10N.getStr("netmonitor.response.mime");
const FONT_PREVIEW_FAILED = L10N.getStr(
"netmonitor.response.fontPreviewFailed"
);
const FONT_PREVIEW_TEXT =
"ABCDEFGHIJKLM\nNOPQRSTUVWXYZ\nabcdefghijklm\nnopqrstuvwxyz\n0123456789";
class FontPreview extends Component {
static get propTypes() {
return {
connector: PropTypes.object.isRequired,
mimeType: PropTypes.string,
url: PropTypes.string,
};
}
constructor(props) {
super(props);
this.state = {
name: "",
dataURL: "",
};
this.onThemeChanged = this.onThemeChanged.bind(this);
}
componentDidMount() {
this.getPreview();
// Listen for theme changes as the color of the preview depends on the theme
gDevTools.on("theme-switched", this.onThemeChanged);
}
componentDidUpdate(prevProps) {
const { url } = this.props;
if (prevProps.url !== url) {
this.getPreview();
}
}
componentWillUnmount() {
gDevTools.off("theme-switched", this.onThemeChanged);
}
/**
* Handler for the "theme-switched" event.
*/
onThemeChanged(frame) {
if (frame === window) {
this.getPreview();
}
}
/**
* Generate the font preview and receives information about the font.
*/
async getPreview() {
const { connector } = this.props;
const toolbox = connector.getToolbox();
const inspectorFront = await toolbox.target.getFront("inspector");
const { pageStyle } = inspectorFront;
const pageFontFaces = await pageStyle.getAllUsedFontFaces({
includePreviews: true,
includeVariations: false,
previewText: FONT_PREVIEW_TEXT,
previewFillStyle: getColor("body-color"),
});
const fontFace = pageFontFaces.find(
pageFontFace => pageFontFace.URI === this.props.url
);
this.setState({
name: fontFace?.name ?? "",
dataURL: (await fontFace?.preview.data.string()) ?? "",
});
}
render() {
const { mimeType } = this.props;
const { name, dataURL } = this.state;
if (dataURL === "") {
return div({ className: "empty-notice" }, FONT_PREVIEW_FAILED);
}
return div(
{ className: "panel-container response-font-box devtools-monospace" },
img({
className: "response-font",
src: dataURL,
alt: "",
}),
div(
{ className: "response-summary" },
div({ className: "tabpanel-summary-label" }, FONT_NAME),
div({ className: "tabpanel-summary-value" }, name)
),
div(
{ className: "response-summary" },
div({ className: "tabpanel-summary-label" }, FONT_MIME_TYPE),
div({ className: "tabpanel-summary-value" }, mimeType)
)
);
}
}
module.exports = FontPreview;