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matchtags.min.js (2355B)

      1 // CodeMirror, copyright (c) by Marijn Haverbeke and others
      2 // Distributed under an MIT license: http://codemirror.net/LICENSE
      3 
      4 (function(mod) {
      5   if (typeof exports == "object" && typeof module == "object") // CommonJS
      6     mod(require("../../lib/codemirror"), require("../fold/xml-fold"));
      7   else if (typeof define == "function" && define.amd) // AMD
      8     define(["../../lib/codemirror", "../fold/xml-fold"], mod);
      9   else // Plain browser env
     10     mod(CodeMirror);
     11 })(function(CodeMirror) {
     12   "use strict";
     13 
     14   CodeMirror.defineOption("matchTags", false, function(cm, val, old) {
     15     if (old && old != CodeMirror.Init) {
     16       cm.off("cursorActivity", doMatchTags);
     17       cm.off("viewportChange", maybeUpdateMatch);
     18       clear(cm);
     19     }
     20     if (val) {
     21       cm.state.matchBothTags = typeof val == "object" && val.bothTags;
     22       cm.on("cursorActivity", doMatchTags);
     23       cm.on("viewportChange", maybeUpdateMatch);
     24       doMatchTags(cm);
     25     }
     26   });
     27 
     28   function clear(cm) {
     29     if (cm.state.tagHit) cm.state.tagHit.clear();
     30     if (cm.state.tagOther) cm.state.tagOther.clear();
     31     cm.state.tagHit = cm.state.tagOther = null;
     32   }
     33 
     34   function doMatchTags(cm) {
     35     cm.state.failedTagMatch = false;
     36     cm.operation(function() {
     37       clear(cm);
     38       if (cm.somethingSelected()) return;
     39       var cur = cm.getCursor(), range = cm.getViewport();
     40       range.from = Math.min(range.from, cur.line); range.to = Math.max(cur.line + 1, range.to);
     41       var match = CodeMirror.findMatchingTag(cm, cur, range);
     42       if (!match) return;
     43       if (cm.state.matchBothTags) {
     44         var hit = match.at == "open" ? match.open : match.close;
     45         if (hit) cm.state.tagHit = cm.markText(hit.from, hit.to, {className: "CodeMirror-matchingtag"});
     46       }
     47       var other = match.at == "close" ? match.open : match.close;
     48       if (other)
     49         cm.state.tagOther = cm.markText(other.from, other.to, {className: "CodeMirror-matchingtag"});
     50       else
     51         cm.state.failedTagMatch = true;
     52     });
     53   }
     54 
     55   function maybeUpdateMatch(cm) {
     56     if (cm.state.failedTagMatch) doMatchTags(cm);
     57   }
     58 
     59   CodeMirror.commands.toMatchingTag = function(cm) {
     60     var found = CodeMirror.findMatchingTag(cm, cm.getCursor());
     61     if (found) {
     62       var other = found.at == "close" ? found.open : found.close;
     63       if (other) cm.extendSelection(other.to, other.from);
     64     }
     65   };
     66 });