add hw2

node_modules/html-to-image/es/embed-webfonts.js

@@ -0,0 +1,205 @@
+import { toArray } from './util';
+import { fetchAsDataURL } from './dataurl';
+import { shouldEmbed, embedResources } from './embed-resources';
+const cssFetchCache = {};
+async function fetchCSS(url) {
+    let cache = cssFetchCache[url];
+    if (cache != null) {
+        return cache;
+    }
+    const res = await fetch(url);
+    const cssText = await res.text();
+    cache = { url, cssText };
+    cssFetchCache[url] = cache;
+    return cache;
+}
+async function embedFonts(data, options) {
+    let cssText = data.cssText;
+    const regexUrl = /url\(["']?([^"')]+)["']?\)/g;
+    const fontLocs = cssText.match(/url\([^)]+\)/g) || [];
+    const loadFonts = fontLocs.map(async (loc) => {
+        let url = loc.replace(regexUrl, '$1');
+        if (!url.startsWith('https://')) {
+            url = new URL(url, data.url).href;
+        }
+        return fetchAsDataURL(url, options.fetchRequestInit, ({ result }) => {
+            cssText = cssText.replace(loc, `url(${result})`);
+            return [loc, result];
+        });
+    });
+    return Promise.all(loadFonts).then(() => cssText);
+}
+function parseCSS(source) {
+    if (source == null) {
+        return [];
+    }
+    const result = [];
+    const commentsRegex = /(\/\*[\s\S]*?\*\/)/gi;
+    // strip out comments
+    let cssText = source.replace(commentsRegex, '');
+    // eslint-disable-next-line prefer-regex-literals
+    const keyframesRegex = new RegExp('((@.*?keyframes [\\s\\S]*?){([\\s\\S]*?}\\s*?)})', 'gi');
+    // eslint-disable-next-line no-constant-condition
+    while (true) {
+        const matches = keyframesRegex.exec(cssText);
+        if (matches === null) {
+            break;
+        }
+        result.push(matches[0]);
+    }
+    cssText = cssText.replace(keyframesRegex, '');
+    const importRegex = /@import[\s\S]*?url\([^)]*\)[\s\S]*?;/gi;
+    // to match css & media queries together
+    const combinedCSSRegex = '((\\s*?(?:\\/\\*[\\s\\S]*?\\*\\/)?\\s*?@media[\\s\\S]' +
+        '*?){([\\s\\S]*?)}\\s*?})|(([\\s\\S]*?){([\\s\\S]*?)})';
+    // unified regex
+    const unifiedRegex = new RegExp(combinedCSSRegex, 'gi');
+    // eslint-disable-next-line no-constant-condition
+    while (true) {
+        let matches = importRegex.exec(cssText);
+        if (matches === null) {
+            matches = unifiedRegex.exec(cssText);
+            if (matches === null) {
+                break;
+            }
+            else {
+                importRegex.lastIndex = unifiedRegex.lastIndex;
+            }
+        }
+        else {
+            unifiedRegex.lastIndex = importRegex.lastIndex;
+        }
+        result.push(matches[0]);
+    }
+    return result;
+}
+async function getCSSRules(styleSheets, options) {
+    const ret = [];
+    const deferreds = [];
+    // First loop inlines imports
+    styleSheets.forEach((sheet) => {
+        if ('cssRules' in sheet) {
+            try {
+                toArray(sheet.cssRules || []).forEach((item, index) => {
+                    if (item.type === CSSRule.IMPORT_RULE) {
+                        let importIndex = index + 1;
+                        const url = item.href;
+                        const deferred = fetchCSS(url)
+                            .then((metadata) => embedFonts(metadata, options))
+                            .then((cssText) => parseCSS(cssText).forEach((rule) => {
+                            try {
+                                sheet.insertRule(rule, rule.startsWith('@import')
+                                    ? (importIndex += 1)
+                                    : sheet.cssRules.length);
+                            }
+                            catch (error) {
+                                console.error('Error inserting rule from remote css', {
+                                    rule,
+                                    error,
+                                });
+                            }
+                        }))
+                            .catch((e) => {
+                            console.error('Error loading remote css', e.toString());
+                        });
+                        deferreds.push(deferred);
+                    }
+                });
+            }
+            catch (e) {
+                const inline = styleSheets.find((a) => a.href == null) || document.styleSheets[0];
+                if (sheet.href != null) {
+                    deferreds.push(fetchCSS(sheet.href)
+                        .then((metadata) => embedFonts(metadata, options))
+                        .then((cssText) => parseCSS(cssText).forEach((rule) => {
+                        inline.insertRule(rule, inline.cssRules.length);
+                    }))
+                        .catch((err) => {
+                        console.error('Error loading remote stylesheet', err);
+                    }));
+                }
+                console.error('Error inlining remote css file', e);
+            }
+        }
+    });
+    return Promise.all(deferreds).then(() => {
+        // Second loop parses rules
+        styleSheets.forEach((sheet) => {
+            if ('cssRules' in sheet) {
+                try {
+                    toArray(sheet.cssRules || []).forEach((item) => {
+                        ret.push(item);
+                    });
+                }
+                catch (e) {
+                    console.error(`Error while reading CSS rules from ${sheet.href}`, e);
+                }
+            }
+        });
+        return ret;
+    });
+}
+function getWebFontRules(cssRules) {
+    return cssRules
+        .filter((rule) => rule.type === CSSRule.FONT_FACE_RULE)
+        .filter((rule) => shouldEmbed(rule.style.getPropertyValue('src')));
+}
+async function parseWebFontRules(node, options) {
+    if (node.ownerDocument == null) {
+        throw new Error('Provided element is not within a Document');
+    }
+    const styleSheets = toArray(node.ownerDocument.styleSheets);
+    const cssRules = await getCSSRules(styleSheets, options);
+    return getWebFontRules(cssRules);
+}
+function normalizeFontFamily(font) {
+    return font.trim().replace(/["']/g, '');
+}
+function getUsedFonts(node) {
+    const fonts = new Set();
+    function traverse(node) {
+        const fontFamily = node.style.fontFamily || getComputedStyle(node).fontFamily;
+        fontFamily.split(',').forEach((font) => {
+            fonts.add(normalizeFontFamily(font));
+        });
+        Array.from(node.children).forEach((child) => {
+            if (child instanceof HTMLElement) {
+                traverse(child);
+            }
+        });
+    }
+    traverse(node);
+    return fonts;
+}
+export async function getWebFontCSS(node, options) {
+    const rules = await parseWebFontRules(node, options);
+    const usedFonts = getUsedFonts(node);
+    const cssTexts = await Promise.all(rules
+        .filter((rule) => usedFonts.has(normalizeFontFamily(rule.style.fontFamily)))
+        .map((rule) => {
+        const baseUrl = rule.parentStyleSheet
+            ? rule.parentStyleSheet.href
+            : null;
+        return embedResources(rule.cssText, baseUrl, options);
+    }));
+    return cssTexts.join('\n');
+}
+export async function embedWebFonts(clonedNode, options) {
+    const cssText = options.fontEmbedCSS != null
+        ? options.fontEmbedCSS
+        : options.skipFonts
+            ? null
+            : await getWebFontCSS(clonedNode, options);
+    if (cssText) {
+        const styleNode = document.createElement('style');
+        const sytleContent = document.createTextNode(cssText);
+        styleNode.appendChild(sytleContent);
+        if (clonedNode.firstChild) {
+            clonedNode.insertBefore(styleNode, clonedNode.firstChild);
+        }
+        else {
+            clonedNode.appendChild(styleNode);
+        }
+    }
+}
+//# sourceMappingURL=embed-webfonts.js.map