@samuelmeuli/font-manager
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Manages, downloads and applies Google Fonts for picker components
464 lines (436 loc) • 24.5 kB
JavaScript
(function (global, factory) {
typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
typeof define === 'function' && define.amd ? define(['exports'], factory) :
(global = global || self, factory(global.FontManager = {}));
}(this, (function (exports) { 'use strict';
/*! *****************************************************************************
Copyright (c) Microsoft Corporation. All rights reserved.
Licensed under the Apache License, Version 2.0 (the "License"); you may not use
this file except in compliance with the License. You may obtain a copy of the
License at http://www.apache.org/licenses/LICENSE-2.0
THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
MERCHANTABLITY OR NON-INFRINGEMENT.
See the Apache Version 2.0 License for specific language governing permissions
and limitations under the License.
***************************************************************************** */
var __assign = function() {
__assign = Object.assign || function __assign(t) {
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s = arguments[i];
for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p)) t[p] = s[p];
}
return t;
};
return __assign.apply(this, arguments);
};
function __rest(s, e) {
var t = {};
for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)
t[p] = s[p];
if (s != null && typeof Object.getOwnPropertySymbols === "function")
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return t;
}
function __awaiter(thisArg, _arguments, P, generator) {
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
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function __generator(thisArg, body) {
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}
}
function styleInject(css, ref) {
if ( ref === void 0 ) ref = {};
var insertAt = ref.insertAt;
if (!css || typeof document === 'undefined') { return; }
var head = document.head || document.getElementsByTagName('head')[0];
var style = document.createElement('style');
style.type = 'text/css';
if (insertAt === 'top') {
if (head.firstChild) {
head.insertBefore(style, head.firstChild);
} else {
head.appendChild(style);
}
} else {
head.appendChild(style);
}
if (style.styleSheet) {
style.styleSheet.cssText = css;
} else {
style.appendChild(document.createTextNode(css));
}
}
var css = "@charset \"UTF-8\";\ndiv[id^=font-picker] {\n position: relative;\n display: inline-block;\n width: 200px;\n box-shadow: 1px 1px 3px rgba(0, 0, 0, 0.2);\n}\ndiv[id^=font-picker] * {\n box-sizing: border-box;\n}\ndiv[id^=font-picker] p {\n margin: 0;\n padding: 0;\n}\ndiv[id^=font-picker] button {\n color: inherit;\n font-size: inherit;\n background: none;\n border: 0;\n outline: none;\n cursor: pointer;\n}\ndiv[id^=font-picker] .dropdown-button {\n display: flex;\n align-items: center;\n justify-content: space-between;\n width: 100%;\n height: 35px;\n padding: 0 10px;\n background: #cbcbcb;\n}\ndiv[id^=font-picker] .dropdown-button:hover, div[id^=font-picker] .dropdown-button:focus {\n background: #bebebe;\n}\ndiv[id^=font-picker] .dropdown-button .dropdown-font-name {\n overflow: hidden;\n white-space: nowrap;\n}\ndiv[id^=font-picker] .dropdown-icon {\n margin-left: 10px;\n}\n@-webkit-keyframes spinner {\n to {\n transform: rotate(360deg);\n }\n}\n@keyframes spinner {\n to {\n transform: rotate(360deg);\n }\n}\ndiv[id^=font-picker] .dropdown-icon.loading::before {\n display: block;\n width: 10px;\n height: 10px;\n border: 2px solid #b2b2b2;\n border-top-color: #000000;\n border-radius: 50%;\n -webkit-animation: spinner 0.6s linear infinite;\n animation: spinner 0.6s linear infinite;\n content: \"\";\n}\ndiv[id^=font-picker] .dropdown-icon.finished::before {\n display: block;\n width: 0;\n height: 0;\n margin: 0 2px;\n border-top: 6px solid #000000;\n border-right: 5px solid transparent;\n border-left: 5px solid transparent;\n transition: transform 0.3s;\n content: \"\";\n}\ndiv[id^=font-picker] .dropdown-icon.error::before {\n content: \"⚠\";\n}\ndiv[id^=font-picker].expanded .dropdown-icon.finished::before {\n transform: rotate(-180deg);\n}\ndiv[id^=font-picker].expanded ul {\n max-height: 200px;\n}\ndiv[id^=font-picker] ul {\n position: absolute;\n z-index: 1;\n width: 100%;\n max-height: 0;\n margin: 0;\n padding: 0;\n overflow-x: hidden;\n overflow-y: auto;\n background: #eaeaea;\n box-shadow: 1px 1px 3px rgba(0, 0, 0, 0.2);\n transition: 0.3s;\n -webkit-overflow-scrolling: touch;\n}\ndiv[id^=font-picker] ul li {\n height: 35px;\n list-style: none;\n}\ndiv[id^=font-picker] ul li button {\n display: flex;\n align-items: center;\n width: 100%;\n height: 100%;\n padding: 0 10px;\n white-space: nowrap;\n}\ndiv[id^=font-picker] ul li button:hover, div[id^=font-picker] ul li button:focus {\n background: #dddddd;\n}\ndiv[id^=font-picker] ul li button.active-font {\n background: #d1d1d1;\n}";
styleInject(css);
function getFontId(fontFamily) {
return fontFamily.replace(/\s+/g, "-").toLowerCase();
}
function validatePickerId(pickerId) {
if (pickerId.match(/[^0-9a-z]/i)) {
throw Error("The `pickerId` parameter may only contain letters and digits");
}
}
function get(url) {
return new Promise(function (resolve, reject) {
var request = new XMLHttpRequest();
request.overrideMimeType("application/json");
request.open("GET", url, true);
request.onreadystatechange = function () {
if (request.readyState === 4) {
if (request.status !== 200) {
reject(new Error("Response has status code " + request.status));
}
else {
resolve(request.responseText);
}
}
};
request.send();
});
}
var LIST_BASE_URL = "https://www.googleapis.com/webfonts/v1/webfonts";
function getFontList(apiKey) {
return __awaiter(this, void 0, void 0, function () {
var url, response, json, fontsOriginal;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
url = new URL(LIST_BASE_URL);
url.searchParams.append("sort", "popularity");
url.searchParams.append("key", apiKey);
return [4, get(url.href)];
case 1:
response = _a.sent();
json = JSON.parse(response);
fontsOriginal = json.items;
return [2, fontsOriginal.map(function (fontOriginal) {
var family = fontOriginal.family, subsets = fontOriginal.subsets, others = __rest(fontOriginal, ["family", "subsets"]);
return __assign(__assign({}, others), { family: family, id: getFontId(family), scripts: subsets });
})];
}
});
});
}
var previewFontsStylesheet = document.createElement("style");
document.head.appendChild(previewFontsStylesheet);
function applyFontPreview(previewFont, selectorSuffix) {
var fontId = getFontId(previewFont.family);
var style = "\n\t\t\t#font-button-" + fontId + selectorSuffix + " {\n\t\t\t\tfont-family: \"" + previewFont.family + "\";\n\t\t\t}\n\t\t";
previewFontsStylesheet.appendChild(document.createTextNode(style));
}
function getActiveFontStylesheet(selectorSuffix) {
var stylesheetId = "active-font-" + selectorSuffix;
var activeFontStylesheet = document.getElementById(stylesheetId);
if (!activeFontStylesheet) {
activeFontStylesheet = document.createElement("style");
activeFontStylesheet.id = stylesheetId;
document.head.appendChild(activeFontStylesheet);
}
return activeFontStylesheet;
}
function applyActiveFont(activeFont, previousFontFamily, selectorSuffix) {
var style = "\n\t\t.apply-font" + selectorSuffix + " {\n\t\t\tfont-family: \"" + activeFont.family + "\"" + (previousFontFamily ? ", \"" + previousFontFamily + "\"" : "") + ";\n\t\t}\n\t";
var activeFontStylesheet = getActiveFontStylesheet(selectorSuffix);
activeFontStylesheet.innerHTML = style;
}
var PREVIEW_ATTRIBUTE_NAME = "data-is-preview";
function getStylesheetId(fontId) {
return "font-" + fontId;
}
function stylesheetExists(fontId, isPreview) {
var stylesheetNode = document.getElementById(getStylesheetId(fontId));
if (isPreview === null || isPreview === undefined) {
return stylesheetNode !== null;
}
return (stylesheetNode !== null &&
stylesheetNode.getAttribute(PREVIEW_ATTRIBUTE_NAME) === isPreview.toString());
}
function createStylesheet(fontId, isPreview) {
var stylesheetNode = document.createElement("style");
stylesheetNode.id = getStylesheetId(fontId);
stylesheetNode.setAttribute(PREVIEW_ATTRIBUTE_NAME, isPreview.toString());
document.head.appendChild(stylesheetNode);
}
function fillStylesheet(fontId, styles) {
var stylesheetId = getStylesheetId(fontId);
var stylesheetNode = document.getElementById(stylesheetId);
if (stylesheetNode) {
stylesheetNode.textContent = styles;
}
else {
console.error("Could not fill stylesheet: Stylesheet with ID \"" + stylesheetId + "\" not found");
}
}
function setStylesheetType(fontId, isPreview) {
var stylesheetId = getStylesheetId(fontId);
var stylesheetNode = document.getElementById(stylesheetId);
if (stylesheetNode) {
stylesheetNode.setAttribute(PREVIEW_ATTRIBUTE_NAME, isPreview.toString());
}
else {
console.error("Could not change stylesheet type: Stylesheet with ID \"" + stylesheetId + "\" not found");
}
}
function getMatches(regex, str) {
var matches = [];
var match;
do {
match = regex.exec(str);
if (match) {
matches.push(match[1]);
}
} while (match);
return matches;
}
var FONT_FACE_REGEX = /@font-face {([\s\S]*?)}/gm;
var FONT_FAMILY_REGEX = /font-family: ['"](.*?)['"]/gm;
function extractFontStyles(allFontStyles) {
var rules = getMatches(FONT_FACE_REGEX, allFontStyles);
var fontStyles = {};
rules.forEach(function (rule) {
var fontFamily = getMatches(FONT_FAMILY_REGEX, rule)[0];
var fontId = getFontId(fontFamily);
if (!(fontId in fontStyles)) {
fontStyles[fontId] = "";
}
fontStyles[fontId] += "@font-face {\n" + rule + "\n}\n\n";
});
return fontStyles;
}
var FONT_BASE_URL = "https://fonts.googleapis.com/css";
function getStylesheet(fonts, scripts, variants, previewsOnly) {
return __awaiter(this, void 0, void 0, function () {
var url, variantsStr, familiesStr, familyNamesConcat, downloadChars;
return __generator(this, function (_a) {
url = new URL(FONT_BASE_URL);
variantsStr = variants.join(",");
familiesStr = fonts.map(function (font) { return font.family + ":" + variantsStr; });
url.searchParams.append("family", familiesStr.join("|"));
url.searchParams.append("subset", scripts.join(","));
if (previewsOnly) {
familyNamesConcat = fonts.map(function (font) { return font.family; }).join("");
downloadChars = familyNamesConcat
.split("")
.filter(function (char, pos, self) { return self.indexOf(char) === pos; })
.join("");
url.searchParams.append("text", downloadChars);
}
url.searchParams.append("font-display", "swap");
return [2, get(url.href)];
});
});
}
function loadFontPreviews(fonts, scripts, variants, selectorSuffix) {
return __awaiter(this, void 0, void 0, function () {
var fontsArray, fontsToFetch, response, fontStyles;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
fontsArray = Array.from(fonts.values());
fontsToFetch = fontsArray
.map(function (font) { return font.id; })
.filter(function (fontId) { return !stylesheetExists(fontId); });
fontsToFetch.forEach(function (fontId) { return createStylesheet(fontId, true); });
return [4, getStylesheet(fontsArray, scripts, variants, true)];
case 1:
response = _a.sent();
fontStyles = extractFontStyles(response);
fontsArray.forEach(function (font) {
applyFontPreview(font, selectorSuffix);
if (fontsToFetch.includes(font.id)) {
if (!(font.id in fontStyles)) {
console.error("Missing styles for font \"" + font.family + "\" (fontId \"" + font.id + "\") in Google Fonts response");
return;
}
fillStylesheet(font.id, fontStyles[font.id]);
}
});
return [2];
}
});
});
}
function loadActiveFont(font, previousFontFamily, scripts, variants, selectorSuffix) {
return __awaiter(this, void 0, void 0, function () {
var fontStyle;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
if (!stylesheetExists(font.id, false)) return [3, 1];
applyActiveFont(font, previousFontFamily, selectorSuffix);
return [3, 3];
case 1:
if (stylesheetExists(font.id, true)) {
setStylesheetType(font.id, false);
}
else {
createStylesheet(font.id, false);
}
return [4, getStylesheet([font], scripts, variants, false)];
case 2:
fontStyle = _a.sent();
applyActiveFont(font, previousFontFamily, selectorSuffix);
fillStylesheet(font.id, fontStyle);
_a.label = 3;
case 3: return [2];
}
});
});
}
var FONT_FAMILY_DEFAULT = "Open Sans";
var OPTIONS_DEFAULTS = {
pickerId: "",
families: [],
categories: [],
scripts: ["latin"],
variants: ["regular"],
filter: function () { return true; },
limit: 50,
sort: "alphabet",
};
var FontManager = (function () {
function FontManager(apiKey, defaultFamily, _a, onChange) {
if (defaultFamily === void 0) { defaultFamily = FONT_FAMILY_DEFAULT; }
var _b = _a.pickerId, pickerId = _b === void 0 ? OPTIONS_DEFAULTS.pickerId : _b, _c = _a.families, families = _c === void 0 ? OPTIONS_DEFAULTS.families : _c, _d = _a.categories, categories = _d === void 0 ? OPTIONS_DEFAULTS.categories : _d, _e = _a.scripts, scripts = _e === void 0 ? OPTIONS_DEFAULTS.scripts : _e, _f = _a.variants, variants = _f === void 0 ? OPTIONS_DEFAULTS.variants : _f, _g = _a.filter, filter = _g === void 0 ? OPTIONS_DEFAULTS.filter : _g, _h = _a.limit, limit = _h === void 0 ? OPTIONS_DEFAULTS.limit : _h, _j = _a.sort, sort = _j === void 0 ? OPTIONS_DEFAULTS.sort : _j;
if (onChange === void 0) { onChange = function () { }; }
this.fonts = new Map();
validatePickerId(pickerId);
this.selectorSuffix = pickerId ? "-" + pickerId : "";
this.apiKey = apiKey;
this.options = {
pickerId: pickerId,
families: families,
categories: categories,
scripts: scripts,
variants: variants,
filter: filter,
limit: limit,
sort: sort,
};
this.onChange = onChange;
this.addFont(defaultFamily, false);
this.setActiveFont(defaultFamily, false);
}
FontManager.prototype.init = function () {
return __awaiter(this, void 0, void 0, function () {
var fonts, _loop_1, this_1, i, state_1, fontsToLoad;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4, getFontList(this.apiKey)];
case 1:
fonts = _a.sent();
_loop_1 = function (i) {
var font = fonts[i];
if (this_1.fonts.size >= this_1.options.limit) {
return "break";
}
if (!this_1.fonts.has(font.family) &&
(this_1.options.families.length === 0 || this_1.options.families.includes(font.family)) &&
(this_1.options.categories.length === 0 || this_1.options.categories.includes(font.category)) &&
this_1.options.scripts.every(function (script) { return font.scripts.includes(script); }) &&
this_1.options.variants.every(function (variant) { return font.variants.includes(variant); }) &&
this_1.options.filter(font) === true) {
this_1.fonts.set(font.family, font);
}
};
this_1 = this;
for (i = 0; i < fonts.length; i += 1) {
state_1 = _loop_1(i);
if (state_1 === "break")
break;
}
fontsToLoad = new Map(this.fonts);
fontsToLoad["delete"](this.activeFontFamily);
loadFontPreviews(fontsToLoad, this.options.scripts, this.options.variants, this.selectorSuffix);
return [2, this.fonts];
}
});
});
};
FontManager.prototype.getFonts = function () {
return this.fonts;
};
FontManager.prototype.addFont = function (fontFamily, downloadPreview) {
if (downloadPreview === void 0) { downloadPreview = true; }
var font = {
family: fontFamily,
id: getFontId(fontFamily),
};
this.fonts.set(fontFamily, font);
if (downloadPreview) {
var fontMap = new Map();
fontMap.set(fontFamily, font);
loadFontPreviews(fontMap, this.options.scripts, this.options.variants, this.selectorSuffix);
}
};
FontManager.prototype.removeFont = function (fontFamily) {
this.fonts["delete"](fontFamily);
};
FontManager.prototype.getActiveFont = function () {
var activeFont = this.fonts.get(this.activeFontFamily);
if (!activeFont) {
throw Error("Cannot get active font: \"" + this.activeFontFamily + "\" is not in the font list");
}
else {
return activeFont;
}
};
FontManager.prototype.setActiveFont = function (fontFamily, runOnChange) {
var _this = this;
if (runOnChange === void 0) { runOnChange = true; }
var previousFontFamily = this.activeFontFamily;
var activeFont = this.fonts.get(fontFamily);
if (!activeFont) {
throw Error("Cannot update active font: \"" + fontFamily + "\" is not in the font list");
}
this.activeFontFamily = fontFamily;
loadActiveFont(activeFont, previousFontFamily, this.options.scripts, this.options.variants, this.selectorSuffix).then(function () {
if (runOnChange) {
_this.onChange(activeFont);
}
});
};
FontManager.prototype.setOnChange = function (onChange) {
this.onChange = onChange;
};
return FontManager;
}());
exports.FONT_FAMILY_DEFAULT = FONT_FAMILY_DEFAULT;
exports.FontManager = FontManager;
exports.OPTIONS_DEFAULTS = OPTIONS_DEFAULTS;
exports.getFontId = getFontId;
Object.defineProperty(exports, '__esModule', { value: true });
})));