118 Zeilen
4.6 KiB
JavaScript
118 Zeilen
4.6 KiB
JavaScript
(function(){
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function SearchCursor(cm, query, pos, caseFold) {
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this.atOccurrence = false; this.cm = cm;
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if (caseFold == null && typeof query == "string") caseFold = false;
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pos = pos ? cm.clipPos(pos) : {line: 0, ch: 0};
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this.pos = {from: pos, to: pos};
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// The matches method is filled in based on the type of query.
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// It takes a position and a direction, and returns an object
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// describing the next occurrence of the query, or null if no
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// more matches were found.
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if (typeof query != "string") // Regexp match
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this.matches = function(reverse, pos) {
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if (reverse) {
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var line = cm.getLine(pos.line).slice(0, pos.ch), match = line.match(query), start = 0;
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while (match) {
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var ind = line.indexOf(match[0]);
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start += ind;
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line = line.slice(ind + 1);
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var newmatch = line.match(query);
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if (newmatch) match = newmatch;
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else break;
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start++;
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}
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}
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else {
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var line = cm.getLine(pos.line).slice(pos.ch), match = line.match(query),
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start = match && pos.ch + line.indexOf(match[0]);
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}
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if (match)
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return {from: {line: pos.line, ch: start},
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to: {line: pos.line, ch: start + match[0].length},
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match: match};
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};
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else { // String query
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if (caseFold) query = query.toLowerCase();
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var fold = caseFold ? function(str){return str.toLowerCase();} : function(str){return str;};
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var target = query.split("\n");
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// Different methods for single-line and multi-line queries
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if (target.length == 1)
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this.matches = function(reverse, pos) {
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var line = fold(cm.getLine(pos.line)), len = query.length, match;
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if (reverse ? (pos.ch >= len && (match = line.lastIndexOf(query, pos.ch - len)) != -1)
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: (match = line.indexOf(query, pos.ch)) != -1)
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return {from: {line: pos.line, ch: match},
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to: {line: pos.line, ch: match + len}};
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};
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else
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this.matches = function(reverse, pos) {
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var ln = pos.line, idx = (reverse ? target.length - 1 : 0), match = target[idx], line = fold(cm.getLine(ln));
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var offsetA = (reverse ? line.indexOf(match) + match.length : line.lastIndexOf(match));
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if (reverse ? offsetA >= pos.ch || offsetA != match.length
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: offsetA <= pos.ch || offsetA != line.length - match.length)
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return;
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for (;;) {
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if (reverse ? !ln : ln == cm.lineCount() - 1) return;
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line = fold(cm.getLine(ln += reverse ? -1 : 1));
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match = target[reverse ? --idx : ++idx];
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if (idx > 0 && idx < target.length - 1) {
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if (line != match) return;
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else continue;
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}
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var offsetB = (reverse ? line.lastIndexOf(match) : line.indexOf(match) + match.length);
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if (reverse ? offsetB != line.length - match.length : offsetB != match.length)
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return;
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var start = {line: pos.line, ch: offsetA}, end = {line: ln, ch: offsetB};
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return {from: reverse ? end : start, to: reverse ? start : end};
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}
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};
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}
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}
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SearchCursor.prototype = {
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findNext: function() {return this.find(false);},
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findPrevious: function() {return this.find(true);},
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find: function(reverse) {
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var self = this, pos = this.cm.clipPos(reverse ? this.pos.from : this.pos.to);
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function savePosAndFail(line) {
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var pos = {line: line, ch: 0};
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self.pos = {from: pos, to: pos};
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self.atOccurrence = false;
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return false;
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}
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for (;;) {
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if (this.pos = this.matches(reverse, pos)) {
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this.atOccurrence = true;
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return this.pos.match || true;
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}
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if (reverse) {
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if (!pos.line) return savePosAndFail(0);
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pos = {line: pos.line-1, ch: this.cm.getLine(pos.line-1).length};
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}
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else {
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var maxLine = this.cm.lineCount();
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if (pos.line == maxLine - 1) return savePosAndFail(maxLine);
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pos = {line: pos.line+1, ch: 0};
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}
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}
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},
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from: function() {if (this.atOccurrence) return this.pos.from;},
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to: function() {if (this.atOccurrence) return this.pos.to;},
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replace: function(newText) {
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var self = this;
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if (this.atOccurrence)
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self.pos.to = this.cm.replaceRange(newText, self.pos.from, self.pos.to);
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}
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};
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CodeMirror.defineExtension("getSearchCursor", function(query, pos, caseFold) {
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return new SearchCursor(this, query, pos, caseFold);
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});
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})();
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