searchcursor.js
117 lines
| 4.6 KiB
| application/javascript
|
JavascriptLexer
Brian Granger
|
r5941 | (function(){ | ||
function SearchCursor(cm, query, pos, caseFold) { | ||||
this.atOccurrence = false; this.cm = cm; | ||||
Matthias BUSSONNIER
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r8053 | if (caseFold == null && typeof query == "string") caseFold = false; | ||
Brian Granger
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r5941 | |||
pos = pos ? cm.clipPos(pos) : {line: 0, ch: 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 | ||||
this.matches = function(reverse, pos) { | ||||
if (reverse) { | ||||
var line = cm.getLine(pos.line).slice(0, pos.ch), match = line.match(query), start = 0; | ||||
while (match) { | ||||
var ind = line.indexOf(match[0]); | ||||
start += ind; | ||||
line = line.slice(ind + 1); | ||||
var newmatch = line.match(query); | ||||
if (newmatch) match = newmatch; | ||||
else break; | ||||
start++; | ||||
} | ||||
} | ||||
else { | ||||
var line = cm.getLine(pos.line).slice(pos.ch), match = line.match(query), | ||||
start = match && pos.ch + line.indexOf(match[0]); | ||||
} | ||||
if (match) | ||||
return {from: {line: pos.line, ch: start}, | ||||
to: {line: pos.line, ch: start + match[0].length}, | ||||
match: match}; | ||||
}; | ||||
else { // String 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) | ||||
this.matches = function(reverse, pos) { | ||||
var line = fold(cm.getLine(pos.line)), len = query.length, match; | ||||
if (reverse ? (pos.ch >= len && (match = line.lastIndexOf(query, pos.ch - len)) != -1) | ||||
: (match = line.indexOf(query, pos.ch)) != -1) | ||||
return {from: {line: pos.line, ch: match}, | ||||
to: {line: pos.line, ch: match + len}}; | ||||
}; | ||||
else | ||||
this.matches = function(reverse, pos) { | ||||
var ln = pos.line, idx = (reverse ? target.length - 1 : 0), match = target[idx], line = fold(cm.getLine(ln)); | ||||
var offsetA = (reverse ? line.indexOf(match) + match.length : line.lastIndexOf(match)); | ||||
if (reverse ? offsetA >= pos.ch || offsetA != match.length | ||||
: offsetA <= pos.ch || offsetA != line.length - match.length) | ||||
return; | ||||
for (;;) { | ||||
if (reverse ? !ln : ln == cm.lineCount() - 1) return; | ||||
line = fold(cm.getLine(ln += reverse ? -1 : 1)); | ||||
match = target[reverse ? --idx : ++idx]; | ||||
if (idx > 0 && idx < target.length - 1) { | ||||
if (line != match) return; | ||||
else continue; | ||||
} | ||||
var offsetB = (reverse ? line.lastIndexOf(match) : line.indexOf(match) + match.length); | ||||
if (reverse ? offsetB != line.length - match.length : offsetB != match.length) | ||||
return; | ||||
var start = {line: pos.line, ch: offsetA}, end = {line: ln, ch: offsetB}; | ||||
return {from: reverse ? end : start, to: reverse ? start : end}; | ||||
} | ||||
}; | ||||
} | ||||
} | ||||
SearchCursor.prototype = { | ||||
findNext: function() {return this.find(false);}, | ||||
findPrevious: function() {return this.find(true);}, | ||||
find: function(reverse) { | ||||
var self = this, pos = this.cm.clipPos(reverse ? this.pos.from : this.pos.to); | ||||
function savePosAndFail(line) { | ||||
var pos = {line: line, ch: 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 = {line: pos.line-1, ch: this.cm.getLine(pos.line-1).length}; | ||||
} | ||||
else { | ||||
var maxLine = this.cm.lineCount(); | ||||
if (pos.line == maxLine - 1) return savePosAndFail(maxLine); | ||||
pos = {line: pos.line+1, ch: 0}; | ||||
} | ||||
} | ||||
}, | ||||
from: function() {if (this.atOccurrence) return this.pos.from;}, | ||||
to: function() {if (this.atOccurrence) return this.pos.to;}, | ||||
replace: function(newText) { | ||||
var self = this; | ||||
if (this.atOccurrence) | ||||
self.pos.to = this.cm.replaceRange(newText, self.pos.from, self.pos.to); | ||||
} | ||||
}; | ||||
CodeMirror.defineExtension("getSearchCursor", function(query, pos, caseFold) { | ||||
return new SearchCursor(this, query, pos, caseFold); | ||||
}); | ||||
})(); | ||||