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// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: http://codemirror.net/LICENSE
(function(mod) {
if (typeof exports == "object" && typeof module == "object") // CommonJS
mod(require("../../lib/codemirror"));
else if (typeof define == "function" && define.amd) // AMD
define(["../../lib/codemirror"], mod);
else // Plain browser env
mod(CodeMirror);
})(function(CodeMirror) {
"use strict";
var Pos = CodeMirror.Pos;
function cmp(a, b) { return a.line - b.line || a.ch - b.ch; }
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";
var nameChar = nameStartChar + "\-\:\.0-9\\u00B7\\u0300-\\u036F\\u203F-\\u2040";
var xmlTagStart = new RegExp("<(/?)([" + nameStartChar + "][" + nameChar + "]*)", "g");
function Iter(cm, line, ch, range) {
this.line = line; this.ch = ch;
this.cm = cm; this.text = cm.getLine(line);
this.min = range ? range.from : cm.firstLine();
this.max = range ? range.to - 1 : cm.lastLine();
}
function tagAt(iter, ch) {
var type = iter.cm.getTokenTypeAt(Pos(iter.line, ch));
return type && /\btag\b/.test(type);
}
function nextLine(iter) {
if (iter.line >= iter.max) return;
iter.ch = 0;
iter.text = iter.cm.getLine(++iter.line);
return true;
}
function prevLine(iter) {
if (iter.line <= iter.min) return;
iter.text = iter.cm.getLine(--iter.line);
iter.ch = iter.text.length;
return true;
}
function toTagEnd(iter) {
for (;;) {
var gt = iter.text.indexOf(">", iter.ch);
if (gt == -1) { if (nextLine(iter)) continue; else return; }
if (!tagAt(iter, gt + 1)) { iter.ch = gt + 1; continue; }
var lastSlash = iter.text.lastIndexOf("/", gt);
var selfClose = lastSlash > -1 && !/\S/.test(iter.text.slice(lastSlash + 1, gt));
iter.ch = gt + 1;
return selfClose ? "selfClose" : "regular";
}
}
function toTagStart(iter) {
for (;;) {
var lt = iter.ch ? iter.text.lastIndexOf("<", iter.ch - 1) : -1;
if (lt == -1) { if (prevLine(iter)) continue; else return; }
if (!tagAt(iter, lt + 1)) { iter.ch = lt; continue; }
xmlTagStart.lastIndex = lt;
iter.ch = lt;
var match = xmlTagStart.exec(iter.text);
if (match && match.index == lt) return match;
}
}
function toNextTag(iter) {
for (;;) {
xmlTagStart.lastIndex = iter.ch;
var found = xmlTagStart.exec(iter.text);
if (!found) { if (nextLine(iter)) continue; else return; }
if (!tagAt(iter, found.index + 1)) { iter.ch = found.index + 1; continue; }
iter.ch = found.index + found[0].length;
return found;
}
}
function toPrevTag(iter) {
for (;;) {
var gt = iter.ch ? iter.text.lastIndexOf(">", iter.ch - 1) : -1;
if (gt == -1) { if (prevLine(iter)) continue; else return; }
if (!tagAt(iter, gt + 1)) { iter.ch = gt; continue; }
var lastSlash = iter.text.lastIndexOf("/", gt);
var selfClose = lastSlash > -1 && !/\S/.test(iter.text.slice(lastSlash + 1, gt));
iter.ch = gt + 1;
return selfClose ? "selfClose" : "regular";
}
}
function findMatchingClose(iter, tag) {
var stack = [];
for (;;) {
var next = toNextTag(iter), end, startLine = iter.line, startCh = iter.ch - (next ? next[0].length : 0);
if (!next || !(end = toTagEnd(iter))) return;
if (end == "selfClose") continue;
if (next[1]) { // closing tag
for (var i = stack.length - 1; i >= 0; --i) if (stack[i] == next[2]) {
stack.length = i;
break;
}
if (i < 0 && (!tag || tag == next[2])) return {
tag: next[2],
from: Pos(startLine, startCh),
to: Pos(iter.line, iter.ch)
};
} else { // opening tag
stack.push(next[2]);
}
}
}
function findMatchingOpen(iter, tag) {
var stack = [];
for (;;) {
var prev = toPrevTag(iter);
if (!prev) return;
if (prev == "selfClose") { toTagStart(iter); continue; }
var endLine = iter.line, endCh = iter.ch;
var start = toTagStart(iter);
if (!start) return;
if (start[1]) { // closing tag
stack.push(start[2]);
} else { // opening tag
for (var i = stack.length - 1; i >= 0; --i) if (stack[i] == start[2]) {
stack.length = i;
break;
}
if (i < 0 && (!tag || tag == start[2])) return {
tag: start[2],
from: Pos(iter.line, iter.ch),
to: Pos(endLine, endCh)
};
}
}
}
CodeMirror.registerHelper("fold", "xml", function(cm, start) {
var iter = new Iter(cm, start.line, 0);
for (;;) {
var openTag = toNextTag(iter), end;
if (!openTag || iter.line != start.line || !(end = toTagEnd(iter))) return;
if (!openTag[1] && end != "selfClose") {
var startPos = Pos(iter.line, iter.ch);
var endPos = findMatchingClose(iter, openTag[2]);
return endPos && {from: startPos, to: endPos.from};
}
}
});
CodeMirror.findMatchingTag = function(cm, pos, range) {
var iter = new Iter(cm, pos.line, pos.ch, range);
if (iter.text.indexOf(">") == -1 && iter.text.indexOf("<") == -1) return;
var end = toTagEnd(iter), to = end && Pos(iter.line, iter.ch);
var start = end && toTagStart(iter);
if (!end || !start || cmp(iter, pos) > 0) return;
var here = {from: Pos(iter.line, iter.ch), to: to, tag: start[2]};
if (end == "selfClose") return {open: here, close: null, at: "open"};
if (start[1]) { // closing tag
return {open: findMatchingOpen(iter, start[2]), close: here, at: "close"};
} else { // opening tag
iter = new Iter(cm, to.line, to.ch, range);
return {open: here, close: findMatchingClose(iter, start[2]), at: "open"};
}
};
CodeMirror.findEnclosingTag = function(cm, pos, range) {
var iter = new Iter(cm, pos.line, pos.ch, range);
for (;;) {
var open = findMatchingOpen(iter);
if (!open) break;
var forward = new Iter(cm, pos.line, pos.ch, range);
var close = findMatchingClose(forward, open.tag);
if (close) return {open: open, close: close};
}
};
// Used by addon/edit/closetag.js
CodeMirror.scanForClosingTag = function(cm, pos, name, end) {
var iter = new Iter(cm, pos.line, pos.ch, end ? {from: 0, to: end} : null);
return findMatchingClose(iter, name);
};
});
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