4 var Pos = CodeMirror.Pos;
5 function cmp(a, b) { return a.line - b.line || a.ch - b.ch; }
7 var nameStartChar = "A-Z_a-z\\u00C0-\\u00D6\\u00D8-\\u00F6\\u00F8-\\u02FF\\u0370-\\u037D\\u037F-\\u1FFF\\u200C-\\u200D\\u2070-\\u218F\\u2C00-\\u2FEF\\u3001-\\uD7FF\\uF900-\\uFDCF\\uFDF0-\\uFFFD";
8 var nameChar = nameStartChar + "\-\:\.0-9\\u00B7\\u0300-\\u036F\\u203F-\\u2040";
9 var xmlTagStart = new RegExp("<(/?)([" + nameStartChar + "][" + nameChar + "]*)", "g");
11 function Iter(cm, line, ch, range) {
12 this.line = line; this.ch = ch;
13 this.cm = cm; this.text = cm.getLine(line);
14 this.min = range ? range.from : cm.firstLine();
15 this.max = range ? range.to - 1 : cm.lastLine();
18 function tagAt(iter, ch) {
19 var type = iter.cm.getTokenTypeAt(Pos(iter.line, ch));
20 return type && /\btag\b/.test(type);
23 function nextLine(iter) {
24 if (iter.line >= iter.max) return;
26 iter.text = iter.cm.getLine(++iter.line);
29 function prevLine(iter) {
30 if (iter.line <= iter.min) return;
31 iter.text = iter.cm.getLine(--iter.line);
32 iter.ch = iter.text.length;
36 function toTagEnd(iter) {
38 var gt = iter.text.indexOf(">", iter.ch);
39 if (gt == -1) { if (nextLine(iter)) continue; else return; }
40 if (!tagAt(iter, gt + 1)) { iter.ch = gt + 1; continue; }
41 var lastSlash = iter.text.lastIndexOf("/", gt);
42 var selfClose = lastSlash > -1 && !/\S/.test(iter.text.slice(lastSlash + 1, gt));
44 return selfClose ? "selfClose" : "regular";
47 function toTagStart(iter) {
49 var lt = iter.ch ? iter.text.lastIndexOf("<", iter.ch - 1) : -1;
50 if (lt == -1) { if (prevLine(iter)) continue; else return; }
51 if (!tagAt(iter, lt + 1)) { iter.ch = lt; continue; }
52 xmlTagStart.lastIndex = lt;
54 var match = xmlTagStart.exec(iter.text);
55 if (match && match.index == lt) return match;
59 function toNextTag(iter) {
61 xmlTagStart.lastIndex = iter.ch;
62 var found = xmlTagStart.exec(iter.text);
63 if (!found) { if (nextLine(iter)) continue; else return; }
64 if (!tagAt(iter, found.index + 1)) { iter.ch = found.index + 1; continue; }
65 iter.ch = found.index + found[0].length;
69 function toPrevTag(iter) {
71 var gt = iter.ch ? iter.text.lastIndexOf(">", iter.ch - 1) : -1;
72 if (gt == -1) { if (prevLine(iter)) continue; else return; }
73 if (!tagAt(iter, gt + 1)) { iter.ch = gt; continue; }
74 var lastSlash = iter.text.lastIndexOf("/", gt);
75 var selfClose = lastSlash > -1 && !/\S/.test(iter.text.slice(lastSlash + 1, gt));
77 return selfClose ? "selfClose" : "regular";
81 function findMatchingClose(iter, tag) {
84 var next = toNextTag(iter), end, startLine = iter.line, startCh = iter.ch - (next ? next[0].length : 0);
85 if (!next || !(end = toTagEnd(iter))) return;
86 if (end == "selfClose") continue;
87 if (next[1]) { // closing tag
88 for (var i = stack.length - 1; i >= 0; --i) if (stack[i] == next[2]) {
92 if (i < 0 && (!tag || tag == next[2])) return {
94 from: Pos(startLine, startCh),
95 to: Pos(iter.line, iter.ch)
97 } else { // opening tag
102 function findMatchingOpen(iter, tag) {
105 var prev = toPrevTag(iter);
107 if (prev == "selfClose") { toTagStart(iter); continue; }
108 var endLine = iter.line, endCh = iter.ch;
109 var start = toTagStart(iter);
111 if (start[1]) { // closing tag
112 stack.push(start[2]);
113 } else { // opening tag
114 for (var i = stack.length - 1; i >= 0; --i) if (stack[i] == start[2]) {
118 if (i < 0 && (!tag || tag == start[2])) return {
120 from: Pos(iter.line, iter.ch),
121 to: Pos(endLine, endCh)
127 CodeMirror.registerHelper("fold", "xml", function(cm, start) {
128 var iter = new Iter(cm, start.line, 0);
130 var openTag = toNextTag(iter), end;
131 if (!openTag || iter.line != start.line || !(end = toTagEnd(iter))) return;
132 if (!openTag[1] && end != "selfClose") {
133 var start = Pos(iter.line, iter.ch);
134 var close = findMatchingClose(iter, openTag[2]);
135 return close && {from: start, to: close.from};
139 CodeMirror.tagRangeFinder = CodeMirror.fold.xml; // deprecated
141 CodeMirror.findMatchingTag = function(cm, pos, range) {
142 var iter = new Iter(cm, pos.line, pos.ch, range);
143 if (iter.text.indexOf(">") == -1 && iter.text.indexOf("<") == -1) return;
144 var end = toTagEnd(iter), to = end && Pos(iter.line, iter.ch);
145 var start = end && toTagStart(iter);
146 if (!end || end == "selfClose" || !start || cmp(iter, pos) > 0) return;
147 var here = {from: Pos(iter.line, iter.ch), to: to, tag: start[2]};
149 if (start[1]) { // closing tag
150 return {open: findMatchingOpen(iter, start[2]), close: here, at: "close"};
151 } else { // opening tag
152 iter = new Iter(cm, to.line, to.ch, range);
153 return {open: here, close: findMatchingClose(iter, start[2]), at: "open"};
157 CodeMirror.findEnclosingTag = function(cm, pos, range) {
158 var iter = new Iter(cm, pos.line, pos.ch, range);
160 var open = findMatchingOpen(iter);
162 var forward = new Iter(cm, pos.line, pos.ch, range);
163 var close = findMatchingClose(forward, open.tag);
164 if (close) return {open: open, close: close};