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matchesonscrollbar.js (3808B)


      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 });