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static/js/domline.js

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+// THIS FILE IS ALSO AN APPJET MODULE: etherpad.collab.ace.domline
+// %APPJET%: import("etherpad.admin.plugins");
+
+/**
+ * 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: top
+// requires: plugins
+// requires: undefined
+
+var domline = {};
+domline.noop = function() {};
+domline.identity = function(x) { return x; };
+
+domline.addToLineClass = function(lineClass, cls) {
+  // an "empty span" at any point can be used to add classes to
+  // the line, using line:className.  otherwise, we ignore
+  // the span.
+  cls.replace(/\S+/g, function (c) {
+    if (c.indexOf("line:") == 0) {
+      // add class to line
+      lineClass = (lineClass ? lineClass+' ' : '')+c.substring(5);
+    }
+  });
+  return lineClass;
+}
+
+// if "document" is falsy we don't create a DOM node, just
+// an object with innerHTML and className
+domline.createDomLine = function(nonEmpty, doesWrap, optBrowser, optDocument) {
+  var result = { node: null,
+                 appendSpan: domline.noop,
+                 prepareForAdd: domline.noop,
+                 notifyAdded: domline.noop,
+                 clearSpans: domline.noop,
+                 finishUpdate: domline.noop,
+                 lineMarker: 0 };
+
+  var browser = (optBrowser || {});
+  var document = optDocument;
+
+  if (document) {
+    result.node = document.createElement("div");
+  }
+  else {
+    result.node = {innerHTML: '', className: ''};
+  }
+
+  var html = [];
+  var preHtml, postHtml;
+  var curHTML = null;
+  function processSpaces(s) {
+    return domline.processSpaces(s, doesWrap);
+  }
+  var identity = domline.identity;
+  var perTextNodeProcess = (doesWrap ? identity : processSpaces);
+  var perHtmlLineProcess = (doesWrap ? processSpaces : identity);
+  var lineClass = 'ace-line';
+  result.appendSpan = function(txt, cls) {
+    if (cls.indexOf('list') >= 0) {
+      var listType = /(?:^| )list:(\S+)/.exec(cls);
+      if (listType) {
+        listType = listType[1];
+        if (listType) {
+          preHtml = '<ul class="list-'+listType+'"><li>';
+          postHtml = '</li></ul>';
+        }
+        result.lineMarker += txt.length;
+        return; // don't append any text
+      }
+    }
+    var href = null;
+    var simpleTags = null;
+    if (cls.indexOf('url') >= 0) {
+      cls = cls.replace(/(^| )url:(\S+)/g, function(x0, space, url) {
+	href = url;
+	return space+"url";
+      });
+    }
+    if (cls.indexOf('tag') >= 0) {
+      cls = cls.replace(/(^| )tag:(\S+)/g, function(x0, space, tag) {
+	if (! simpleTags) simpleTags = [];
+	simpleTags.push(tag.toLowerCase());
+	return space+tag;
+      });
+    }
+
+    var extraOpenTags = "";
+    var extraCloseTags = "";
+
+    var plugins_;
+    if (typeof(plugins)!='undefined') {
+      plugins_ = plugins;
+    } else {
+      plugins_ = parent.parent.plugins;
+    }
+
+    plugins_.callHook(
+      "aceCreateDomLine", {domline:domline, cls:cls}
+    ).map(function (modifier) {
+      cls = modifier.cls;
+      extraOpenTags = extraOpenTags+modifier.extraOpenTags;
+      extraCloseTags = modifier.extraCloseTags+extraCloseTags;
+    });
+
+    if ((! txt) && cls) {
+      lineClass = domline.addToLineClass(lineClass, cls);
+    }
+    else if (txt) {
+      if (href) {
+	extraOpenTags = extraOpenTags+'<a href="'+
+	  href.replace(/\"/g, '&quot;')+'">';
+	extraCloseTags = '</a>'+extraCloseTags;
+      }
+      if (simpleTags) {
+	simpleTags.sort();
+	extraOpenTags = extraOpenTags+'<'+simpleTags.join('><')+'>';
+	simpleTags.reverse();
+	extraCloseTags = '</'+simpleTags.join('></')+'>'+extraCloseTags;
+      }
+      html.push('<span class="',cls||'','">',extraOpenTags,
+		perTextNodeProcess(domline.escapeHTML(txt)),
+                extraCloseTags,'</span>');
+    }
+  };
+  result.clearSpans = function() {
+    html = [];
+    lineClass = ''; // non-null to cause update
+    result.lineMarker = 0;
+  };
+  function writeHTML() {
+    var newHTML = perHtmlLineProcess(html.join(''));
+    if (! newHTML) {
+      if ((! document) || (! optBrowser)) {
+        newHTML += '&nbsp;';
+      }
+      else if (! browser.msie) {
+        newHTML += '<br/>';
+      }
+    }
+    if (nonEmpty) {
+      newHTML = (preHtml||'')+newHTML+(postHtml||'');
+    }
+    html = preHtml = postHtml = null; // free memory
+    if (newHTML !== curHTML) {
+      curHTML = newHTML;
+      result.node.innerHTML = curHTML;
+    }
+    if (lineClass !== null) result.node.className = lineClass;
+  }
+  result.prepareForAdd = writeHTML;
+  result.finishUpdate = writeHTML;
+  result.getInnerHTML = function() { return curHTML || ''; };
+
+  return result;
+};
+
+domline.escapeHTML = function(s) {
+  var re = /[&<>'"]/g; /']/; // stupid indentation thing
+  if (! re.MAP) {
+    // persisted across function calls!
+    re.MAP = {
+      '&': '&amp;',
+      '<': '&lt;',
+      '>': '&gt;',
+      '"': '&#34;',
+      "'": '&#39;'
+    };
+  }
+  return s.replace(re, function(c) { return re.MAP[c]; });
+};
+
+domline.processSpaces = function(s, doesWrap) {
+  if (s.indexOf("<") < 0 && ! doesWrap) {
+    // short-cut
+    return s.replace(/ /g, '&nbsp;');
+  }
+  var parts = [];
+  s.replace(/<[^>]*>?| |[^ <]+/g, function(m) { parts.push(m); });
+  if (doesWrap) {
+    var endOfLine = true;
+    var beforeSpace = false;
+    // last space in a run is normal, others are nbsp,
+    // end of line is nbsp
+    for(var i=parts.length-1;i>=0;i--) {
+      var p = parts[i];
+      if (p == " ") {
+	if (endOfLine || beforeSpace)
+	  parts[i] = '&nbsp;';
+	endOfLine = false;
+	beforeSpace = true;
+      }
+      else if (p.charAt(0) != "<") {
+	endOfLine = false;
+	beforeSpace = false;
+      }
+    }
+    // beginning of line is nbsp
+    for(var i=0;i<parts.length;i++) {
+      var p = parts[i];
+      if (p == " ") {
+	parts[i] = '&nbsp;';
+	break;
+      }
+      else if (p.charAt(0) != "<") {
+	break;
+      }
+    }
+  }
+  else {
+    for(var i=0;i<parts.length;i++) {
+      var p = parts[i];
+      if (p == " ") {
+	parts[i] = '&nbsp;';
+      }
+    }
+  }
+  return parts.join('');
+};