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✏️ Editing: searchcursor.js

// 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"));

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

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

else // Plain browser env

mod(CodeMirror);

})(function(CodeMirror) {

"use strict";

var Pos = CodeMirror.Pos;

function SearchCursor(doc, query, pos, caseFold) {

this.atOccurrence = false; this.doc = doc;

if (caseFold == null && typeof query == "string") caseFold = false;

pos = pos ? doc.clipPos(pos) : Pos(0, 0);

this.pos = {from: pos, to: pos};

// The matches method is filled in based on the type of query.

// It takes a position and a direction, and returns an object

// describing the next occurrence of the query, or null if no

// more matches were found.

if (typeof query != "string") { // Regexp match

if (!query.global) query = new RegExp(query.source, query.ignoreCase ? "ig" : "g");

this.matches = function(reverse, pos) {

if (reverse) {

query.lastIndex = 0;

var line = doc.getLine(pos.line).slice(0, pos.ch), cutOff = 0, match, start;

for (;;) {

query.lastIndex = cutOff;

var newMatch = query.exec(line);

if (!newMatch) break;

match = newMatch;

start = match.index;

cutOff = match.index + (match[0].length || 1);

if (cutOff == line.length) break;

}

var matchLen = (match && match[0].length) || 0;

if (!matchLen) {

if (start == 0 && line.length == 0) {match = undefined;}

else if (start != doc.getLine(pos.line).length) {

matchLen++;

}

} else {

query.lastIndex = pos.ch;

var line = doc.getLine(pos.line), match = query.exec(line);

var matchLen = (match && match[0].length) || 0;

var start = match && match.index;

if (start + matchLen != line.length && !matchLen) matchLen = 1;

}

if (match && matchLen)

return {from: Pos(pos.line, start),

to: Pos(pos.line, start + matchLen),

match: match};

};

} else { // String query

var origQuery = query;

if (caseFold) query = query.toLowerCase();

var fold = caseFold ? function(str){return str.toLowerCase();} : function(str){return str;};

var target = query.split("\n");

// Different methods for single-line and multi-line queries

if (target.length == 1) {

if (!query.length) {

// Empty string would match anything and never progress, so

// we define it to match nothing instead.

this.matches = function() {};

} else {

this.matches = function(reverse, pos) {

if (reverse) {

var orig = doc.getLine(pos.line).slice(0, pos.ch), line = fold(orig);

var match = line.lastIndexOf(query);

if (match > -1) {

match = adjustPos(orig, line, match);

return {from: Pos(pos.line, match), to: Pos(pos.line, match + origQuery.length)};

}

} else {

var orig = doc.getLine(pos.line).slice(pos.ch), line = fold(orig);

var match = line.indexOf(query);

if (match > -1) {

match = adjustPos(orig, line, match) + pos.ch;

return {from: Pos(pos.line, match), to: Pos(pos.line, match + origQuery.length)};

}

};

}

} else {

var origTarget = origQuery.split("\n");

this.matches = function(reverse, pos) {

var last = target.length - 1;

if (reverse) {

if (pos.line - (target.length - 1) < doc.firstLine()) return;

if (fold(doc.getLine(pos.line).slice(0, origTarget[last].length)) != target[target.length - 1]) return;

var to = Pos(pos.line, origTarget[last].length);

for (var ln = pos.line - 1, i = last - 1; i >= 1; --i, --ln)

if (target[i] != fold(doc.getLine(ln))) return;

var line = doc.getLine(ln), cut = line.length - origTarget[0].length;

if (fold(line.slice(cut)) != target[0]) return;

return {from: Pos(ln, cut), to: to};

} else {

if (pos.line + (target.length - 1) > doc.lastLine()) return;

var line = doc.getLine(pos.line), cut = line.length - origTarget[0].length;

if (fold(line.slice(cut)) != target[0]) return;

var from = Pos(pos.line, cut);

for (var ln = pos.line + 1, i = 1; i < last; ++i, ++ln)

if (target[i] != fold(doc.getLine(ln))) return;

if (fold(doc.getLine(ln).slice(0, origTarget[last].length)) != target[last]) return;

return {from: from, to: Pos(ln, origTarget[last].length)};

}

};

}

SearchCursor.prototype = {

findNext: function() {return this.find(false);},

findPrevious: function() {return this.find(true);},

find: function(reverse) {

var self = this, pos = this.doc.clipPos(reverse ? this.pos.from : this.pos.to);

function savePosAndFail(line) {

var pos = Pos(line, 0);

self.pos = {from: pos, to: pos};

self.atOccurrence = false;

return false;

}

for (;;) {

if (this.pos = this.matches(reverse, pos)) {

this.atOccurrence = true;

return this.pos.match || true;

}

if (reverse) {

if (!pos.line) return savePosAndFail(0);

pos = Pos(pos.line-1, this.doc.getLine(pos.line-1).length);

}

else {

var maxLine = this.doc.lineCount();

if (pos.line == maxLine - 1) return savePosAndFail(maxLine);

pos = Pos(pos.line + 1, 0);

}

from: function() {if (this.atOccurrence) return this.pos.from;},

to: function() {if (this.atOccurrence) return this.pos.to;},

replace: function(newText, origin) {

if (!this.atOccurrence) return;

var lines = CodeMirror.splitLines(newText);

this.doc.replaceRange(lines, this.pos.from, this.pos.to, origin);

this.pos.to = Pos(this.pos.from.line + lines.length - 1,

lines[lines.length - 1].length + (lines.length == 1 ? this.pos.from.ch : 0));

}

};

// Maps a position in a case-folded line back to a position in the original line

// (compensating for codepoints increasing in number during folding)

function adjustPos(orig, folded, pos) {

if (orig.length == folded.length) return pos;

for (var pos1 = Math.min(pos, orig.length);;) {

var len1 = orig.slice(0, pos1).toLowerCase().length;

if (len1 < pos) ++pos1;

else if (len1 > pos) --pos1;

else return pos1;

}

CodeMirror.defineExtension("getSearchCursor", function(query, pos, caseFold) {

return new SearchCursor(this.doc, query, pos, caseFold);

});

CodeMirror.defineDocExtension("getSearchCursor", function(query, pos, caseFold) {

return new SearchCursor(this, query, pos, caseFold);

});

CodeMirror.defineExtension("selectMatches", function(query, caseFold) {

var ranges = [];

var cur = this.getSearchCursor(query, this.getCursor("from"), caseFold);

while (cur.findNext()) {

if (CodeMirror.cmpPos(cur.to(), this.getCursor("to")) > 0) break;

ranges.push({anchor: cur.from(), head: cur.to()});

}

if (ranges.length)

this.setSelections(ranges, 0);

});

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