github.com/jancarloviray/community@v0.41.1-0.20170124221257-33a66c87cf2f/app/public/codemirror/addon/search/matchesonscrollbar.js (about)

     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("./searchcursor"), require("../scroll/annotatescrollbar"));
     7    else if (typeof define == "function" && define.amd) // AMD
     8      define(["../../lib/codemirror", "./searchcursor", "../scroll/annotatescrollbar"], mod);
     9    else // Plain browser env
    10      mod(CodeMirror);
    11  })(function(CodeMirror) {
    12    "use strict";
    13  
    14    CodeMirror.defineExtension("showMatchesOnScrollbar", function(query, caseFold, options) {
    15      if (typeof options == "string") options = {className: options};
    16      if (!options) options = {};
    17      return new SearchAnnotation(this, query, caseFold, options);
    18    });
    19  
    20    function SearchAnnotation(cm, query, caseFold, options) {
    21      this.cm = cm;
    22      this.options = options;
    23      var annotateOptions = {listenForChanges: false};
    24      for (var prop in options) annotateOptions[prop] = options[prop];
    25      if (!annotateOptions.className) annotateOptions.className = "CodeMirror-search-match";
    26      this.annotation = cm.annotateScrollbar(annotateOptions);
    27      this.query = query;
    28      this.caseFold = caseFold;
    29      this.gap = {from: cm.firstLine(), to: cm.lastLine() + 1};
    30      this.matches = [];
    31      this.update = null;
    32  
    33      this.findMatches();
    34      this.annotation.update(this.matches);
    35  
    36      var self = this;
    37      cm.on("change", this.changeHandler = function(_cm, change) { self.onChange(change); });
    38    }
    39  
    40    var MAX_MATCHES = 1000;
    41  
    42    SearchAnnotation.prototype.findMatches = function() {
    43      if (!this.gap) return;
    44      for (var i = 0; i < this.matches.length; i++) {
    45        var match = this.matches[i];
    46        if (match.from.line >= this.gap.to) break;
    47        if (match.to.line >= this.gap.from) this.matches.splice(i--, 1);
    48      }
    49      var cursor = this.cm.getSearchCursor(this.query, CodeMirror.Pos(this.gap.from, 0), this.caseFold);
    50      var maxMatches = this.options && this.options.maxMatches || MAX_MATCHES;
    51      while (cursor.findNext()) {
    52        var match = {from: cursor.from(), to: cursor.to()};
    53        if (match.from.line >= this.gap.to) break;
    54        this.matches.splice(i++, 0, match);
    55        if (this.matches.length > maxMatches) break;
    56      }
    57      this.gap = null;
    58    };
    59  
    60    function offsetLine(line, changeStart, sizeChange) {
    61      if (line <= changeStart) return line;
    62      return Math.max(changeStart, line + sizeChange);
    63    }
    64  
    65    SearchAnnotation.prototype.onChange = function(change) {
    66      var startLine = change.from.line;
    67      var endLine = CodeMirror.changeEnd(change).line;
    68      var sizeChange = endLine - change.to.line;
    69      if (this.gap) {
    70        this.gap.from = Math.min(offsetLine(this.gap.from, startLine, sizeChange), change.from.line);
    71        this.gap.to = Math.max(offsetLine(this.gap.to, startLine, sizeChange), change.from.line);
    72      } else {
    73        this.gap = {from: change.from.line, to: endLine + 1};
    74      }
    75  
    76      if (sizeChange) for (var i = 0; i < this.matches.length; i++) {
    77        var match = this.matches[i];
    78        var newFrom = offsetLine(match.from.line, startLine, sizeChange);
    79        if (newFrom != match.from.line) match.from = CodeMirror.Pos(newFrom, match.from.ch);
    80        var newTo = offsetLine(match.to.line, startLine, sizeChange);
    81        if (newTo != match.to.line) match.to = CodeMirror.Pos(newTo, match.to.ch);
    82      }
    83      clearTimeout(this.update);
    84      var self = this;
    85      this.update = setTimeout(function() { self.updateAfterChange(); }, 250);
    86    };
    87  
    88    SearchAnnotation.prototype.updateAfterChange = function() {
    89      this.findMatches();
    90      this.annotation.update(this.matches);
    91    };
    92  
    93    SearchAnnotation.prototype.clear = function() {
    94      this.cm.off("change", this.changeHandler);
    95      this.annotation.clear();
    96    };
    97  });