1 files changed, 253 insertions, 0 deletions
diff --git a/trunk/infrastructure/ace/www/linestylefilter.js b/trunk/infrastructure/ace/www/linestylefilter.js
new file mode 100644
index 0000000..ef824cc
--- /dev/null
+++ b/trunk/infrastructure/ace/www/linestylefilter.js
@@ -0,0 +1,253 @@
+// THIS FILE IS ALSO AN APPJET MODULE: etherpad.collab.ace.linestylefilter
+// %APPJET%: import("etherpad.collab.ace.easysync2.Changeset");
+
+/**
+ * Copyright 2009 Google Inc.
+ *
+ * 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
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS-IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// requires: easysync2.Changeset
+
+var linestylefilter = {};
+
+linestylefilter.ATTRIB_CLASSES = {
+  'bold':'tag:b',
+  'italic':'tag:i',
+  'underline':'tag:u',
+  'strikethrough':'tag:s',
+  'h1':'tag:h1',
+  'h2':'tag:h2',
+  'h3':'tag:h3',
+  'h4':'tag:h4',
+  'h5':'tag:h5',
+  'h6':'tag:h6'
+};
+
+linestylefilter.getAuthorClassName = function(author) {
+  return "author-"+author.replace(/[^a-y0-9]/g, function(c) {
+    if (c == ".") return "-";
+    return 'z'+c.charCodeAt(0)+'z';
+  });
+};
+
+// lineLength is without newline; aline includes newline,
+// but may be falsy if lineLength == 0
+linestylefilter.getLineStyleFilter = function(lineLength, aline,
+                                              textAndClassFunc, apool) {
+
+  if (lineLength == 0) return textAndClassFunc;
+
+  var nextAfterAuthorColors = textAndClassFunc;
+
+  var authorColorFunc = (function() {
+    var lineEnd = lineLength;
+    var curIndex = 0;
+    var extraClasses;
+    var leftInAuthor;
+
+    function attribsToClasses(attribs) {
+      var classes = '';
+      Changeset.eachAttribNumber(attribs, function(n) {
+	var key = apool.getAttribKey(n);
+	if (key) {
+	  var value = apool.getAttribValue(n);
+	  if (value) {
+	    if (key == 'author') {
+	      classes += ' '+linestylefilter.getAuthorClassName(value);
+	    }
+            else if (key == 'list') {
+              classes += ' list:'+value;
+            }
+	    else if (linestylefilter.ATTRIB_CLASSES[key]) {
+	      classes += ' '+linestylefilter.ATTRIB_CLASSES[key];
+	    }
+	  }
+	}
+      });
+      return classes.substring(1);
+    }
+
+    var attributionIter = Changeset.opIterator(aline);
+    var nextOp, nextOpClasses;
+    function goNextOp() {
+      nextOp = attributionIter.next();
+      nextOpClasses = (nextOp.opcode && attribsToClasses(nextOp.attribs));
+    }
+    goNextOp();
+    function nextClasses() {
+      if (curIndex < lineEnd) {
+	extraClasses = nextOpClasses;
+	leftInAuthor = nextOp.chars;
+	goNextOp();
+	while (nextOp.opcode && nextOpClasses == extraClasses) {
+	  leftInAuthor += nextOp.chars;
+	  goNextOp();
+	}
+      }
+    }
+    nextClasses();
+
+    return function(txt, cls) {
+      while (txt.length > 0) {
+	if (leftInAuthor <= 0) {
+	  // prevent infinite loop if something funny's going on
+	  return nextAfterAuthorColors(txt, cls);
+	}
+	var spanSize = txt.length;
+	if (spanSize > leftInAuthor) {
+	  spanSize = leftInAuthor;
+	}
+	var curTxt = txt.substring(0, spanSize);
+	txt = txt.substring(spanSize);
+	nextAfterAuthorColors(curTxt, (cls&&cls+" ")+extraClasses);
+	curIndex += spanSize;
+	leftInAuthor -= spanSize;
+	if (leftInAuthor == 0) {
+	  nextClasses();
+	}
+      }
+    };
+  })();
+  return authorColorFunc;
+};
+
+linestylefilter.getAtSignSplitterFilter = function(lineText,
+                                                   textAndClassFunc) {
+  var at = /@/g;
+  at.lastIndex = 0;
+  var splitPoints = null;
+  var execResult;
+  while ((execResult = at.exec(lineText))) {
+    if (! splitPoints) {
+      splitPoints = [];
+    }
+    splitPoints.push(execResult.index);
+  }
+
+  if (! splitPoints) return textAndClassFunc;
+
+  return linestylefilter.textAndClassFuncSplitter(textAndClassFunc,
+                                                  splitPoints);
+};
+
+linestylefilter.REGEX_WORDCHAR = /[\u0030-\u0039\u0041-\u005A\u0061-\u007A\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u00FF\u0100-\u1FFF\u3040-\u9FFF\uF900-\uFDFF\uFE70-\uFEFE\uFF10-\uFF19\uFF21-\uFF3A\uFF41-\uFF5A\uFF66-\uFFDC]/;
+linestylefilter.REGEX_URLCHAR = new RegExp('('+/[-:@a-zA-Z0-9_.,~%+\/\\?=&#;()$]/.source+'|'+linestylefilter.REGEX_WORDCHAR.source+')');
+linestylefilter.REGEX_URL = new RegExp(/(?:(?:https?|s?ftp|ftps|file|smb|afp|nfs|(x-)?man|gopher|txmt):\/\/|mailto:)/.source+linestylefilter.REGEX_URLCHAR.source+'*(?![:.,;])'+linestylefilter.REGEX_URLCHAR.source, 'g');
+
+linestylefilter.getURLFilter = function(lineText, textAndClassFunc) {
+  linestylefilter.REGEX_URL.lastIndex = 0;
+  var urls = null;
+  var splitPoints = null;
+  var execResult;
+  while ((execResult = linestylefilter.REGEX_URL.exec(lineText))) {
+    if (! urls) {
+      urls = [];
+      splitPoints = [];
+    }
+    var startIndex = execResult.index;
+    var url = execResult[0];
+    urls.push([startIndex, url]);
+    splitPoints.push(startIndex, startIndex + url.length);
+  }
+
+  if (! urls) return textAndClassFunc;
+
+  function urlForIndex(idx) {
+    for(var k=0; k<urls.length; k++) {
+      var u = urls[k];
+      if (idx >= u[0] && idx < u[0]+u[1].length) {
+	return u[1];
+      }
+    }
+    return false;
+  }
+
+  var handleUrlsAfterSplit = (function() {
+    var curIndex = 0;
+    return function(txt, cls) {
+      var txtlen = txt.length;
+      var newCls = cls;
+      var url = urlForIndex(curIndex);
+      if (url) {
+	newCls += " url:"+url;
+      }
+      textAndClassFunc(txt, newCls);
+      curIndex += txtlen;
+    };
+  })();
+
+  return linestylefilter.textAndClassFuncSplitter(handleUrlsAfterSplit,
+                                                  splitPoints);
+};
+
+linestylefilter.textAndClassFuncSplitter = function(func, splitPointsOpt) {
+  var nextPointIndex = 0;
+  var idx = 0;
+
+  // don't split at 0
+  while (splitPointsOpt &&
+	 nextPointIndex < splitPointsOpt.length &&
+	 splitPointsOpt[nextPointIndex] == 0) {
+    nextPointIndex++;
+  }
+
+  function spanHandler(txt, cls) {
+    if ((! splitPointsOpt) || nextPointIndex >= splitPointsOpt.length) {
+      func(txt, cls);
+      idx += txt.length;
+    }
+    else {
+      var splitPoints = splitPointsOpt;
+      var pointLocInSpan = splitPoints[nextPointIndex] - idx;
+      var txtlen = txt.length;
+      if (pointLocInSpan >= txtlen) {
+	func(txt, cls);
+	idx += txt.length;
+	if (pointLocInSpan == txtlen) {
+	  nextPointIndex++;
+	}
+      }
+      else {
+	if (pointLocInSpan > 0) {
+	  func(txt.substring(0, pointLocInSpan), cls);
+	  idx += pointLocInSpan;
+	}
+	nextPointIndex++;
+	// recurse
+	spanHandler(txt.substring(pointLocInSpan), cls);
+      }
+    }
+  }
+  return spanHandler;
+};
+
+// domLineObj is like that returned by domline.createDomLine
+linestylefilter.populateDomLine = function(textLine, aline, apool,
+                                           domLineObj) {
+  // remove final newline from text if any
+  var text = textLine;
+  if (text.slice(-1) == '\n') {
+    text = text.substring(0, text.length-1);
+  }
+
+  function textAndClassFunc(tokenText, tokenClass) {
+    domLineObj.appendSpan(tokenText, tokenClass);
+  }
+
+  var func = textAndClassFunc;
+  func = linestylefilter.getURLFilter(text, func);
+  func = linestylefilter.getLineStyleFilter(text.length, aline,
+                                            func, apool);
+  func(text, '');
+};