Add packages to optimize svgs dynamically
These packages will be used to dynamically optimize SVG images
during the build.
R=jacktfranklin@chromium.org
Bug: 1216402
Change-Id: I04e95aa7d79c9d67beaf8a7861182c52b16b7d0f
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/2939992
Reviewed-by: Jack Franklin <jacktfranklin@chromium.org>
Commit-Queue: Tim van der Lippe <tvanderlippe@chromium.org>
diff --git a/node_modules/css-tree/lib/tokenizer/utils.js b/node_modules/css-tree/lib/tokenizer/utils.js
new file mode 100644
index 0000000..f5a38ec
--- /dev/null
+++ b/node_modules/css-tree/lib/tokenizer/utils.js
@@ -0,0 +1,243 @@
+var charCodeDef = require('./char-code-definitions');
+var isDigit = charCodeDef.isDigit;
+var isHexDigit = charCodeDef.isHexDigit;
+var isUppercaseLetter = charCodeDef.isUppercaseLetter;
+var isName = charCodeDef.isName;
+var isWhiteSpace = charCodeDef.isWhiteSpace;
+var isValidEscape = charCodeDef.isValidEscape;
+
+function getCharCode(source, offset) {
+ return offset < source.length ? source.charCodeAt(offset) : 0;
+}
+
+function getNewlineLength(source, offset, code) {
+ if (code === 13 /* \r */ && getCharCode(source, offset + 1) === 10 /* \n */) {
+ return 2;
+ }
+
+ return 1;
+}
+
+function cmpChar(testStr, offset, referenceCode) {
+ var code = testStr.charCodeAt(offset);
+
+ // code.toLowerCase() for A..Z
+ if (isUppercaseLetter(code)) {
+ code = code | 32;
+ }
+
+ return code === referenceCode;
+}
+
+function cmpStr(testStr, start, end, referenceStr) {
+ if (end - start !== referenceStr.length) {
+ return false;
+ }
+
+ if (start < 0 || end > testStr.length) {
+ return false;
+ }
+
+ for (var i = start; i < end; i++) {
+ var testCode = testStr.charCodeAt(i);
+ var referenceCode = referenceStr.charCodeAt(i - start);
+
+ // testCode.toLowerCase() for A..Z
+ if (isUppercaseLetter(testCode)) {
+ testCode = testCode | 32;
+ }
+
+ if (testCode !== referenceCode) {
+ return false;
+ }
+ }
+
+ return true;
+}
+
+function findWhiteSpaceStart(source, offset) {
+ for (; offset >= 0; offset--) {
+ if (!isWhiteSpace(source.charCodeAt(offset))) {
+ break;
+ }
+ }
+
+ return offset + 1;
+}
+
+function findWhiteSpaceEnd(source, offset) {
+ for (; offset < source.length; offset++) {
+ if (!isWhiteSpace(source.charCodeAt(offset))) {
+ break;
+ }
+ }
+
+ return offset;
+}
+
+function findDecimalNumberEnd(source, offset) {
+ for (; offset < source.length; offset++) {
+ if (!isDigit(source.charCodeAt(offset))) {
+ break;
+ }
+ }
+
+ return offset;
+}
+
+// § 4.3.7. Consume an escaped code point
+function consumeEscaped(source, offset) {
+ // It assumes that the U+005C REVERSE SOLIDUS (\) has already been consumed and
+ // that the next input code point has already been verified to be part of a valid escape.
+ offset += 2;
+
+ // hex digit
+ if (isHexDigit(getCharCode(source, offset - 1))) {
+ // Consume as many hex digits as possible, but no more than 5.
+ // Note that this means 1-6 hex digits have been consumed in total.
+ for (var maxOffset = Math.min(source.length, offset + 5); offset < maxOffset; offset++) {
+ if (!isHexDigit(getCharCode(source, offset))) {
+ break;
+ }
+ }
+
+ // If the next input code point is whitespace, consume it as well.
+ var code = getCharCode(source, offset);
+ if (isWhiteSpace(code)) {
+ offset += getNewlineLength(source, offset, code);
+ }
+ }
+
+ return offset;
+}
+
+// §4.3.11. Consume a name
+// Note: This algorithm does not do the verification of the first few code points that are necessary
+// to ensure the returned code points would constitute an <ident-token>. If that is the intended use,
+// ensure that the stream starts with an identifier before calling this algorithm.
+function consumeName(source, offset) {
+ // Let result initially be an empty string.
+ // Repeatedly consume the next input code point from the stream:
+ for (; offset < source.length; offset++) {
+ var code = source.charCodeAt(offset);
+
+ // name code point
+ if (isName(code)) {
+ // Append the code point to result.
+ continue;
+ }
+
+ // the stream starts with a valid escape
+ if (isValidEscape(code, getCharCode(source, offset + 1))) {
+ // Consume an escaped code point. Append the returned code point to result.
+ offset = consumeEscaped(source, offset) - 1;
+ continue;
+ }
+
+ // anything else
+ // Reconsume the current input code point. Return result.
+ break;
+ }
+
+ return offset;
+}
+
+// §4.3.12. Consume a number
+function consumeNumber(source, offset) {
+ var code = source.charCodeAt(offset);
+
+ // 2. If the next input code point is U+002B PLUS SIGN (+) or U+002D HYPHEN-MINUS (-),
+ // consume it and append it to repr.
+ if (code === 0x002B || code === 0x002D) {
+ code = source.charCodeAt(offset += 1);
+ }
+
+ // 3. While the next input code point is a digit, consume it and append it to repr.
+ if (isDigit(code)) {
+ offset = findDecimalNumberEnd(source, offset + 1);
+ code = source.charCodeAt(offset);
+ }
+
+ // 4. If the next 2 input code points are U+002E FULL STOP (.) followed by a digit, then:
+ if (code === 0x002E && isDigit(source.charCodeAt(offset + 1))) {
+ // 4.1 Consume them.
+ // 4.2 Append them to repr.
+ code = source.charCodeAt(offset += 2);
+
+ // 4.3 Set type to "number".
+ // TODO
+
+ // 4.4 While the next input code point is a digit, consume it and append it to repr.
+
+ offset = findDecimalNumberEnd(source, offset);
+ }
+
+ // 5. If the next 2 or 3 input code points are U+0045 LATIN CAPITAL LETTER E (E)
+ // or U+0065 LATIN SMALL LETTER E (e), ... , followed by a digit, then:
+ if (cmpChar(source, offset, 101 /* e */)) {
+ var sign = 0;
+ code = source.charCodeAt(offset + 1);
+
+ // ... optionally followed by U+002D HYPHEN-MINUS (-) or U+002B PLUS SIGN (+) ...
+ if (code === 0x002D || code === 0x002B) {
+ sign = 1;
+ code = source.charCodeAt(offset + 2);
+ }
+
+ // ... followed by a digit
+ if (isDigit(code)) {
+ // 5.1 Consume them.
+ // 5.2 Append them to repr.
+
+ // 5.3 Set type to "number".
+ // TODO
+
+ // 5.4 While the next input code point is a digit, consume it and append it to repr.
+ offset = findDecimalNumberEnd(source, offset + 1 + sign + 1);
+ }
+ }
+
+ return offset;
+}
+
+// § 4.3.14. Consume the remnants of a bad url
+// ... its sole use is to consume enough of the input stream to reach a recovery point
+// where normal tokenizing can resume.
+function consumeBadUrlRemnants(source, offset) {
+ // Repeatedly consume the next input code point from the stream:
+ for (; offset < source.length; offset++) {
+ var code = source.charCodeAt(offset);
+
+ // U+0029 RIGHT PARENTHESIS ())
+ // EOF
+ if (code === 0x0029) {
+ // Return.
+ offset++;
+ break;
+ }
+
+ if (isValidEscape(code, getCharCode(source, offset + 1))) {
+ // Consume an escaped code point.
+ // Note: This allows an escaped right parenthesis ("\)") to be encountered
+ // without ending the <bad-url-token>. This is otherwise identical to
+ // the "anything else" clause.
+ offset = consumeEscaped(source, offset);
+ }
+ }
+
+ return offset;
+}
+
+module.exports = {
+ consumeEscaped: consumeEscaped,
+ consumeName: consumeName,
+ consumeNumber: consumeNumber,
+ consumeBadUrlRemnants: consumeBadUrlRemnants,
+
+ cmpChar: cmpChar,
+ cmpStr: cmpStr,
+
+ getNewlineLength: getNewlineLength,
+ findWhiteSpaceStart: findWhiteSpaceStart,
+ findWhiteSpaceEnd: findWhiteSpaceEnd
+};