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/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
/* vim: set ft=javascript ts=2 et sw=2 tw=80: */
/* 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
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
const {gDevTools} = require("devtools/client/framework/devtools");
const DEFAULT_PREVIEW_TEXT = "Abc";
const PREVIEW_UPDATE_DELAY = 150;
const {Task} = require("devtools/shared/task");
const {getColor} = require("devtools/client/shared/theme");
function FontInspector(inspector, window) {
this.inspector = inspector;
this.pageStyle = this.inspector.pageStyle;
this.chromeDoc = window.document;
this.init();
}
FontInspector.prototype = {
init: function () {
this.update = this.update.bind(this);
this.onNewNode = this.onNewNode.bind(this);
this.onThemeChanged = this.onThemeChanged.bind(this);
this.inspector.selection.on("new-node-front", this.onNewNode);
this.inspector.sidebar.on("fontinspector-selected", this.onNewNode);
this.showAll = this.showAll.bind(this);
this.showAllLink = this.chromeDoc.getElementById("font-showall");
this.showAllLink.addEventListener("click", this.showAll);
this.previewTextChanged = this.previewTextChanged.bind(this);
this.previewInput = this.chromeDoc.getElementById("font-preview-text-input");
this.previewInput.addEventListener("input", this.previewTextChanged);
this.previewInput.addEventListener("contextmenu",
this.inspector.onTextBoxContextMenu);
// Listen for theme changes as the color of the previews depend on the theme
gDevTools.on("theme-switched", this.onThemeChanged);
this.update();
},
/**
* Is the fontinspector visible in the sidebar?
*/
isActive: function () {
return this.inspector.sidebar &&
this.inspector.sidebar.getCurrentTabID() == "fontinspector";
},
/**
* Remove listeners.
*/
destroy: function () {
this.chromeDoc = null;
this.inspector.sidebar.off("fontinspector-selected", this.onNewNode);
this.inspector.selection.off("new-node-front", this.onNewNode);
this.showAllLink.removeEventListener("click", this.showAll);
this.previewInput.removeEventListener("input", this.previewTextChanged);
this.previewInput.removeEventListener("contextmenu",
this.inspector.onTextBoxContextMenu);
gDevTools.off("theme-switched", this.onThemeChanged);
if (this._previewUpdateTimeout) {
clearTimeout(this._previewUpdateTimeout);
}
},
/**
* Selection 'new-node' event handler.
*/
onNewNode: function () {
if (this.isActive() &&
this.inspector.selection.isConnected() &&
this.inspector.selection.isElementNode()) {
this.undim();
this.update();
} else {
this.dim();
}
},
/**
* The text to use for previews. Returns either the value user has typed to
* the preview input or DEFAULT_PREVIEW_TEXT if the input is empty or contains
* only whitespace.
*/
getPreviewText: function () {
let inputText = this.previewInput.value.trim();
if (inputText === "") {
return DEFAULT_PREVIEW_TEXT;
}
return inputText;
},
/**
* Preview input 'input' event handler.
*/
previewTextChanged: function () {
if (this._previewUpdateTimeout) {
clearTimeout(this._previewUpdateTimeout);
}
this._previewUpdateTimeout = setTimeout(() => {
this.update(this._lastUpdateShowedAllFonts);
}, PREVIEW_UPDATE_DELAY);
},
/**
* Callback for the theme-switched event.
*/
onThemeChanged: function (event, frame) {
if (frame === this.chromeDoc.defaultView) {
this.update(this._lastUpdateShowedAllFonts);
}
},
/**
* Hide the font list. No node are selected.
*/
dim: function () {
let panel = this.chromeDoc.getElementById("sidebar-panel-fontinspector");
panel.classList.add("dim");
this.clear();
},
/**
* Show the font list. A node is selected.
*/
undim: function () {
let panel = this.chromeDoc.getElementById("sidebar-panel-fontinspector");
panel.classList.remove("dim");
},
/**
* Clears the font list.
*/
clear: function () {
this.chromeDoc.querySelector("#all-fonts").innerHTML = "";
},
/**
* Retrieve all the font info for the selected node and display it.
*/
update: Task.async(function* (showAllFonts) {
let node = this.inspector.selection.nodeFront;
let panel = this.chromeDoc.getElementById("sidebar-panel-fontinspector");
if (!node ||
!this.isActive() ||
!this.inspector.selection.isConnected() ||
!this.inspector.selection.isElementNode() ||
panel.classList.contains("dim")) {
return;
}
this._lastUpdateShowedAllFonts = showAllFonts;
let options = {
includePreviews: true,
previewText: this.getPreviewText(),
previewFillStyle: getColor("body-color")
};
let fonts = [];
if (showAllFonts) {
fonts = yield this.pageStyle.getAllUsedFontFaces(options)
.then(null, console.error);
} else {
fonts = yield this.pageStyle.getUsedFontFaces(node, options)
.then(null, console.error);
}
if (!fonts || !fonts.length) {
// No fonts to display. Clear the previously shown fonts.
this.clear();
return;
}
for (let font of fonts) {
font.previewUrl = yield font.preview.data.string();
}
// in case we've been destroyed in the meantime
if (!this.chromeDoc) {
return;
}
// Make room for the new fonts.
this.clear();
for (let font of fonts) {
this.render(font);
}
this.inspector.emit("fontinspector-updated");
}),
/**
* Display the information of one font.
*/
render: function (font) {
let s = this.chromeDoc.querySelector("#font-template > section");
s = s.cloneNode(true);
s.querySelector(".font-name").textContent = font.name;
s.querySelector(".font-css-name").textContent = font.CSSFamilyName;
if (font.URI) {
s.classList.add("is-remote");
} else {
s.classList.add("is-local");
}
let formatElem = s.querySelector(".font-format");
if (font.format) {
formatElem.textContent = font.format;
} else {
formatElem.hidden = true;
}
s.querySelector(".font-url").value = font.URI;
if (font.rule) {
// This is the @font-face{…} code.
let cssText = font.ruleText;
s.classList.add("has-code");
s.querySelector(".font-css-code").textContent = cssText;
}
let preview = s.querySelector(".font-preview");
preview.src = font.previewUrl;
this.chromeDoc.querySelector("#all-fonts").appendChild(s);
},
/**
* Show all fonts for the document (including iframes)
*/
showAll: function () {
this.update(true);
},
};
exports.FontInspector = FontInspector;
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