Incs/codemirror/addon/selection/mark-selection.js

这里只显示每个文件的开头 60 行。登录后可以解锁完整代码。

微信扫码关注公众号，代码整理好后第一时间通知你。

// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: https://codemirror.net/LICENSE

// Because sometimes you need to mark the selected *text*.
//
// Adds an option 'styleSelectedText' which, when enabled, gives
// selected text the CSS class given as option value, or
// "CodeMirror-selectedtext" when the value is not a string.

(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";

  CodeMirror.defineOption("styleSelectedText", false, function(cm, val, old) {
    var prev = old && old != CodeMirror.Init;
    if (val && !prev) {
      cm.state.markedSelection = [];
      cm.state.markedSelectionStyle = typeof val == "string" ? val : "CodeMirror-selectedtext";
      reset(cm);
      cm.on("cursorActivity", onCursorActivity);
      cm.on("change", onChange);
    } else if (!val && prev) {
      cm.off("cursorActivity", onCursorActivity);
      cm.off("change", onChange);
      clear(cm);
      cm.state.markedSelection = cm.state.markedSelectionStyle = null;
    }
  });

  function onCursorActivity(cm) {
    if (cm.state.markedSelection)
      cm.operation(function() { update(cm); });
  }

  function onChange(cm) {
    if (cm.state.markedSelection && cm.state.markedSelection.length)
      cm.operation(function() { clear(cm); });
  }

  var CHUNK_SIZE = 8;
  var Pos = CodeMirror.Pos;
  var cmp = CodeMirror.cmpPos;

  function coverRange(cm, from, to, addAt) {
    if (cmp(from, to) == 0) return;
    var array = cm.state.markedSelection;
    var cls = cm.state.markedSelectionStyle;
    for (var line = from.line;;) {
      var start = line == from.line ? from : Pos(line, 0);
      var endLine = line + CHUNK_SIZE, atEnd = endLine >= to.line;
      var end = atEnd ? to : Pos(endLine, 0);
      var mark = cm.markText(start, end, {className: cls});
      if (addAt == null) array.push(mark);
      else array.splice(addAt++, 0, mark);