From 3a754133dbc138390503341fd2e9beba3e43aa4b Mon Sep 17 00:00:00 2001 From: Jose Antonio Marquez Date: Fri, 27 Jan 2012 12:05:17 -0800 Subject: Merged old FileIO --- imports/codemirror/lib/util/searchcursor.js | 117 ++++++++++++++++++++++++++++ 1 file changed, 117 insertions(+) create mode 100755 imports/codemirror/lib/util/searchcursor.js (limited to 'imports/codemirror/lib/util/searchcursor.js') diff --git a/imports/codemirror/lib/util/searchcursor.js b/imports/codemirror/lib/util/searchcursor.js new file mode 100755 index 00000000..3b77829f --- /dev/null +++ b/imports/codemirror/lib/util/searchcursor.js @@ -0,0 +1,117 @@ +(function(){ + function SearchCursor(cm, query, pos, caseFold) { + this.atOccurrence = false; this.cm = cm; + if (caseFold == null) caseFold = typeof query == "string" && query == query.toLowerCase(); + + 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); + }); +})(); -- cgit v1.2.3