Subversion-Projekte lars-tiefland.cienc

// 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"), require("./searchcursor"), require("../scroll/annotatescrollbar"));

  else if (typeof define == "function" && define.amd) // AMD

    define(["../../lib/codemirror", "./searchcursor", "../scroll/annotatescrollbar"], mod);

  else // Plain browser env

    mod(CodeMirror);

})(function(CodeMirror) {

  "use strict";

  CodeMirror.defineExtension("showMatchesOnScrollbar", function(query, caseFold, options) {

    if (typeof options == "string") options = {className: options};

    if (!options) options = {};

    return new SearchAnnotation(this, query, caseFold, options);

  });

  function SearchAnnotation(cm, query, caseFold, options) {

    this.cm = cm;

    this.options = options;

    var annotateOptions = {listenForChanges: false};

    for (var prop in options) annotateOptions[prop] = options[prop];

    if (!annotateOptions.className) annotateOptions.className = "CodeMirror-search-match";

    this.annotation = cm.annotateScrollbar(annotateOptions);

    this.query = query;

    this.caseFold = caseFold;

    this.gap = {from: cm.firstLine(), to: cm.lastLine() + 1};

    this.matches = [];

    this.update = null;

    this.findMatches();

    this.annotation.update(this.matches);

    var self = this;

    cm.on("change", this.changeHandler = function(_cm, change) { self.onChange(change); });

  }

  var MAX_MATCHES = 1000;

  SearchAnnotation.prototype.findMatches = function() {

    if (!this.gap) return;

    for (var i = 0; i < this.matches.length; i++) {

      var match = this.matches[i];

      if (match.from.line >= this.gap.to) break;

      if (match.to.line >= this.gap.from) this.matches.splice(i--, 1);

    }

    var cursor = this.cm.getSearchCursor(this.query, CodeMirror.Pos(this.gap.from, 0), this.caseFold);

    var maxMatches = this.options && this.options.maxMatches || MAX_MATCHES;

    while (cursor.findNext()) {

      var match = {from: cursor.from(), to: cursor.to()};

      if (match.from.line >= this.gap.to) break;

      this.matches.splice(i++, 0, match);

      if (this.matches.length > maxMatches) break;

    }

    this.gap = null;

  };

  function offsetLine(line, changeStart, sizeChange) {

    if (line <= changeStart) return line;

    return Math.max(changeStart, line + sizeChange);

  }

  SearchAnnotation.prototype.onChange = function(change) {

    var startLine = change.from.line;

    var endLine = CodeMirror.changeEnd(change).line;

    var sizeChange = endLine - change.to.line;

    if (this.gap) {

      this.gap.from = Math.min(offsetLine(this.gap.from, startLine, sizeChange), change.from.line);

      this.gap.to = Math.max(offsetLine(this.gap.to, startLine, sizeChange), change.from.line);

    } else {

      this.gap = {from: change.from.line, to: endLine + 1};

    }

    if (sizeChange) for (var i = 0; i < this.matches.length; i++) {

      var match = this.matches[i];

      var newFrom = offsetLine(match.from.line, startLine, sizeChange);

      if (newFrom != match.from.line) match.from = CodeMirror.Pos(newFrom, match.from.ch);

      var newTo = offsetLine(match.to.line, startLine, sizeChange);

      if (newTo != match.to.line) match.to = CodeMirror.Pos(newTo, match.to.ch);

    }

    clearTimeout(this.update);

    var self = this;

    this.update = setTimeout(function() { self.updateAfterChange(); }, 250);

  };

  SearchAnnotation.prototype.updateAfterChange = function() {

    this.findMatches();

    this.annotation.update(this.matches);

  };

  SearchAnnotation.prototype.clear = function() {

    this.cm.off("change", this.changeHandler);

    this.annotation.clear();

  };

});