Subversion-Projekte lars-tiefland.ci

// CodeMirror, copyright (c) by Marijn Haverbeke and others

// Distributed under an MIT license: http://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) {

    cm.operation(function() { update(cm); });

  }

  function onChange(cm) {

    if (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);

      if (atEnd) break;

      line = endLine;

    }

  }

  function clear(cm) {

    var array = cm.state.markedSelection;

    for (var i = 0; i < array.length; ++i) array[i].clear();

    array.length = 0;

  }

  function reset(cm) {

    clear(cm);

    var ranges = cm.listSelections();

    for (var i = 0; i < ranges.length; i++)

      coverRange(cm, ranges[i].from(), ranges[i].to());

  }

  function update(cm) {

    if (!cm.somethingSelected()) return clear(cm);

    if (cm.listSelections().length > 1) return reset(cm);

    var from = cm.getCursor("start"), to = cm.getCursor("end");

    var array = cm.state.markedSelection;

    if (!array.length) return coverRange(cm, from, to);

    var coverStart = array[0].find(), coverEnd = array[array.length - 1].find();

    if (!coverStart || !coverEnd || to.line - from.line < CHUNK_SIZE ||

        cmp(from, coverEnd.to) >= 0 || cmp(to, coverStart.from) <= 0)

      return reset(cm);

    while (cmp(from, coverStart.from) > 0) {

      array.shift().clear();

      coverStart = array[0].find();

    }

    if (cmp(from, coverStart.from) < 0) {

      if (coverStart.to.line - from.line < CHUNK_SIZE) {

        array.shift().clear();

        coverRange(cm, from, coverStart.to, 0);

      } else {

        coverRange(cm, from, coverStart.from, 0);

      }

    }

    while (cmp(to, coverEnd.to) < 0) {

      array.pop().clear();

      coverEnd = array[array.length - 1].find();

    }

    if (cmp(to, coverEnd.to) > 0) {

      if (to.line - coverEnd.from.line < CHUNK_SIZE) {

        array.pop().clear();

        coverRange(cm, coverEnd.from, to);

      } else {

        coverRange(cm, coverEnd.to, to);

      }

    }

  }

});