clear

2017-08-21 08:50:25 +08:00
parent 06c11ba9cd
commit 7feaa4eca0
1899 changed files with 181363 additions and 22513 deletions
--- a/node_modules/clean-css/lib/urls/reduce.js
+++ b/node_modules/clean-css/lib/urls/reduce.js
@@ -0,0 +1,154 @@
+var split = require('../utils/split');
+
+var URL_PREFIX = 'url(';
+var UPPERCASE_URL_PREFIX = 'URL(';
+var URL_SUFFIX = ')';
+var SINGLE_QUOTE_URL_SUFFIX = '\')';
+var DOUBLE_QUOTE_URL_SUFFIX = '")';
+
+var DATA_URI_PREFIX_PATTERN = /^\s*['"]?\s*data:/;
+var DATA_URI_TRAILER_PATTERN = /[\s\};,\/!]/;
+
+var IMPORT_URL_PREFIX = '@import';
+var UPPERCASE_IMPORT_URL_PREFIX = '@IMPORT';
+
+var COMMENT_END_MARKER = /\*\//;
+
+function byUrl(data, context, callback) {
+  var nextStart = 0;
+  var nextStartUpperCase = 0;
+  var nextEnd = 0;
+  var firstMatch;
+  var isDataURI = false;
+  var cursor = 0;
+  var tempData = [];
+  var hasUppercaseUrl = data.indexOf(UPPERCASE_URL_PREFIX) > -1;
+
+  for (; nextEnd < data.length;) {
+    nextStart = data.indexOf(URL_PREFIX, nextEnd);
+    nextStartUpperCase = hasUppercaseUrl ? data.indexOf(UPPERCASE_URL_PREFIX, nextEnd) : -1;
+    if (nextStart == -1 && nextStartUpperCase == -1)
+      break;
+
+    if (nextStart == -1 && nextStartUpperCase > -1)
+      nextStart = nextStartUpperCase;
+
+    if (data[nextStart + URL_PREFIX.length] == '"') {
+      nextEnd = data.indexOf(DOUBLE_QUOTE_URL_SUFFIX, nextStart);
+    } else if (data[nextStart + URL_PREFIX.length] == '\'') {
+      nextEnd = data.indexOf(SINGLE_QUOTE_URL_SUFFIX, nextStart);
+    } else {
+      isDataURI = DATA_URI_PREFIX_PATTERN.test(data.substring(nextStart + URL_PREFIX.length));
+
+      if (isDataURI) {
+        firstMatch = split(data.substring(nextStart), DATA_URI_TRAILER_PATTERN, false, '(', ')', true).pop();
+
+        if (firstMatch && firstMatch[firstMatch.length - 1] == URL_SUFFIX) {
+          nextEnd = nextStart + firstMatch.length - URL_SUFFIX.length;
+        } else {
+          nextEnd = -1;
+        }
+      } else {
+        nextEnd = data.indexOf(URL_SUFFIX, nextStart);
+      }
+    }
+
+
+    // Following lines are a safety mechanism to ensure
+    // incorrectly terminated urls are processed correctly.
+    if (nextEnd == -1) {
+      nextEnd = data.indexOf('}', nextStart);
+
+      if (nextEnd == -1)
+        nextEnd = data.length;
+      else
+        nextEnd--;
+
+      context.warnings.push('Broken URL declaration: \'' + data.substring(nextStart, nextEnd + 1) + '\'.');
+    } else {
+      if (data[nextEnd] != URL_SUFFIX)
+        nextEnd = data.indexOf(URL_SUFFIX, nextEnd);
+    }
+
+    tempData.push(data.substring(cursor, nextStart));
+
+    var url = data.substring(nextStart, nextEnd + 1);
+    callback(url, tempData);
+
+    cursor = nextEnd + 1;
+  }
+
+  return tempData.length > 0 ?
+    tempData.join('') + data.substring(cursor, data.length) :
+    data;
+}
+
+function byImport(data, context, callback) {
+  var nextImport = 0;
+  var nextImportUpperCase = 0;
+  var nextStart = 0;
+  var nextEnd = 0;
+  var cursor = 0;
+  var tempData = [];
+  var nextSingleQuote = 0;
+  var nextDoubleQuote = 0;
+  var untilNextQuote;
+  var withQuote;
+  var SINGLE_QUOTE = '\'';
+  var DOUBLE_QUOTE = '"';
+
+  for (; nextEnd < data.length;) {
+    nextImport = data.indexOf(IMPORT_URL_PREFIX, nextEnd);
+    nextImportUpperCase = data.indexOf(UPPERCASE_IMPORT_URL_PREFIX, nextEnd);
+    if (nextImport == -1 && nextImportUpperCase == -1)
+      break;
+
+    if (nextImport > -1 && nextImportUpperCase > -1 && nextImportUpperCase < nextImport)
+      nextImport = nextImportUpperCase;
+
+    nextSingleQuote = data.indexOf(SINGLE_QUOTE, nextImport);
+    nextDoubleQuote = data.indexOf(DOUBLE_QUOTE, nextImport);
+
+    if (nextSingleQuote > -1 && nextDoubleQuote > -1 && nextSingleQuote < nextDoubleQuote) {
+      nextStart = nextSingleQuote;
+      withQuote = SINGLE_QUOTE;
+    } else if (nextSingleQuote > -1 && nextDoubleQuote > -1 && nextSingleQuote > nextDoubleQuote) {
+      nextStart = nextDoubleQuote;
+      withQuote = DOUBLE_QUOTE;
+    } else if (nextSingleQuote > -1) {
+      nextStart = nextSingleQuote;
+      withQuote = SINGLE_QUOTE;
+    } else if (nextDoubleQuote > -1) {
+      nextStart = nextDoubleQuote;
+      withQuote = DOUBLE_QUOTE;
+    } else {
+      break;
+    }
+
+    tempData.push(data.substring(cursor, nextStart));
+    nextEnd = data.indexOf(withQuote, nextStart + 1);
+
+    untilNextQuote = data.substring(nextImport, nextEnd);
+    if (nextEnd == -1 || /^@import\s+(url\(|__ESCAPED)/i.test(untilNextQuote) || COMMENT_END_MARKER.test(untilNextQuote)) {
+      cursor = nextStart;
+      break;
+    }
+
+    var url = data.substring(nextStart, nextEnd + 1);
+    callback(url, tempData);
+
+    cursor = nextEnd + 1;
+  }
+
+  return tempData.length > 0 ?
+    tempData.join('') + data.substring(cursor, data.length) :
+    data;
+}
+
+function reduceAll(data, context, callback) {
+  data = byUrl(data, context, callback);
+  data = byImport(data, context, callback);
+  return data;
+}
+
+module.exports = reduceAll;