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Diffstat (limited to 'infrastructure/ace/www/domline.js')
| -rw-r--r-- | infrastructure/ace/www/domline.js | 210 |
1 files changed, 210 insertions, 0 deletions
diff --git a/infrastructure/ace/www/domline.js b/infrastructure/ace/www/domline.js new file mode 100644 index 0000000..70f86cc --- /dev/null +++ b/infrastructure/ace/www/domline.js @@ -0,0 +1,210 @@ +// THIS FILE IS ALSO AN APPJET MODULE: etherpad.collab.ace.domline + +/** + * 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. + */ + +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; + }); + } + if ((! txt) && cls) { + lineClass = domline.addToLineClass(lineClass, cls); + } + else if (txt) { + var extraOpenTags = ""; + var extraCloseTags = ""; + if (href) { + extraOpenTags = extraOpenTags+'<a href="'+ + href.replace(/\"/g, '"')+'">'; + 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 += ' '; + } + 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 = { + '&': '&', + '<': '<', + '>': '>', + '"': '"', + "'": ''' + }; + } + 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, ' '); + } + 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] = ' '; + 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] = ' '; + break; + } + else if (p.charAt(0) != "<") { + break; + } + } + } + else { + for(var i=0;i<parts.length;i++) { + var p = parts[i]; + if (p == " ") { + parts[i] = ' '; + } + } + } + return parts.join(''); +}; |