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202 lines
7.1 KiB
202 lines
7.1 KiB
// CodeMirror, copyright (c) by Marijn Haverbeke and others
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// Distributed under an MIT license: http://codemirror.net/LICENSE
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(function(mod) {
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if (typeof exports == "object" && typeof module == "object") // CommonJS
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mod(require("../../lib/codemirror"));
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else if (typeof define == "function" && define.amd) // AMD
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define(["../../lib/codemirror"], mod);
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else // Plain browser env
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mod(CodeMirror);
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})(function(CodeMirror) {
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var defaults = {
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pairs: "()[]{}''\"\"",
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triples: "",
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explode: "[]{}"
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};
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var Pos = CodeMirror.Pos;
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CodeMirror.defineOption("autoCloseBrackets", false, function(cm, val, old) {
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if (old && old != CodeMirror.Init) {
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cm.removeKeyMap(keyMap);
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cm.state.closeBrackets = null;
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}
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if (val) {
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cm.state.closeBrackets = val;
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cm.addKeyMap(keyMap);
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}
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});
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function getOption(conf, name) {
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if (name == "pairs" && typeof conf == "string") return conf;
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if (typeof conf == "object" && conf[name] != null) return conf[name];
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return defaults[name];
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}
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var bind = defaults.pairs + "`";
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var keyMap = {Backspace: handleBackspace, Enter: handleEnter};
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for (var i = 0; i < bind.length; i++)
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keyMap["'" + bind.charAt(i) + "'"] = handler(bind.charAt(i));
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function handler(ch) {
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return function(cm) { return handleChar(cm, ch); };
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}
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function getConfig(cm) {
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var deflt = cm.state.closeBrackets;
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if (!deflt || deflt.override) return deflt;
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var mode = cm.getModeAt(cm.getCursor());
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return mode.closeBrackets || deflt;
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}
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function handleBackspace(cm) {
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var conf = getConfig(cm);
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if (!conf || cm.getOption("disableInput")) return CodeMirror.Pass;
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var pairs = getOption(conf, "pairs");
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var ranges = cm.listSelections();
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for (var i = 0; i < ranges.length; i++) {
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if (!ranges[i].empty()) return CodeMirror.Pass;
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var around = charsAround(cm, ranges[i].head);
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if (!around || pairs.indexOf(around) % 2 != 0) return CodeMirror.Pass;
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}
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for (var i = ranges.length - 1; i >= 0; i--) {
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var cur = ranges[i].head;
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cm.replaceRange("", Pos(cur.line, cur.ch - 1), Pos(cur.line, cur.ch + 1), "+delete");
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}
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}
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function handleEnter(cm) {
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var conf = getConfig(cm);
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var explode = conf && getOption(conf, "explode");
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if (!explode || cm.getOption("disableInput")) return CodeMirror.Pass;
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var ranges = cm.listSelections();
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for (var i = 0; i < ranges.length; i++) {
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if (!ranges[i].empty()) return CodeMirror.Pass;
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var around = charsAround(cm, ranges[i].head);
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if (!around || explode.indexOf(around) % 2 != 0) return CodeMirror.Pass;
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}
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cm.operation(function() {
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cm.replaceSelection("\n\n", null);
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cm.execCommand("goCharLeft");
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ranges = cm.listSelections();
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for (var i = 0; i < ranges.length; i++) {
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var line = ranges[i].head.line;
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cm.indentLine(line, null, true);
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cm.indentLine(line + 1, null, true);
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}
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});
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}
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function contractSelection(sel) {
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var inverted = CodeMirror.cmpPos(sel.anchor, sel.head) > 0;
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return {anchor: new Pos(sel.anchor.line, sel.anchor.ch + (inverted ? -1 : 1)),
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head: new Pos(sel.head.line, sel.head.ch + (inverted ? 1 : -1))};
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}
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function handleChar(cm, ch) {
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var conf = getConfig(cm);
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if (!conf || cm.getOption("disableInput")) return CodeMirror.Pass;
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var pairs = getOption(conf, "pairs");
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var pos = pairs.indexOf(ch);
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if (pos == -1) return CodeMirror.Pass;
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var triples = getOption(conf, "triples");
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var identical = pairs.charAt(pos + 1) == ch;
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var ranges = cm.listSelections();
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var opening = pos % 2 == 0;
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var type;
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for (var i = 0; i < ranges.length; i++) {
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var range = ranges[i], cur = range.head, curType;
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var next = cm.getRange(cur, Pos(cur.line, cur.ch + 1));
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if (opening && !range.empty()) {
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curType = "surround";
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} else if ((identical || !opening) && next == ch) {
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if (identical && stringStartsAfter(cm, cur))
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curType = "both";
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else if (triples.indexOf(ch) >= 0 && cm.getRange(cur, Pos(cur.line, cur.ch + 3)) == ch + ch + ch)
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curType = "skipThree";
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else
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curType = "skip";
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} else if (identical && cur.ch > 1 && triples.indexOf(ch) >= 0 &&
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cm.getRange(Pos(cur.line, cur.ch - 2), cur) == ch + ch &&
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(cur.ch <= 2 || cm.getRange(Pos(cur.line, cur.ch - 3), Pos(cur.line, cur.ch - 2)) != ch)) {
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curType = "addFour";
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} else if (identical) {
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if (!CodeMirror.isWordChar(next) && enteringString(cm, cur, ch)) curType = "both";
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else return CodeMirror.Pass;
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} else if (opening && (cm.getLine(cur.line).length == cur.ch ||
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isClosingBracket(next, pairs) ||
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/\s/.test(next))) {
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curType = "both";
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} else {
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return CodeMirror.Pass;
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}
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if (!type) type = curType;
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else if (type != curType) return CodeMirror.Pass;
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}
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var left = pos % 2 ? pairs.charAt(pos - 1) : ch;
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var right = pos % 2 ? ch : pairs.charAt(pos + 1);
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cm.operation(function() {
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if (type == "skip") {
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cm.execCommand("goCharRight");
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} else if (type == "skipThree") {
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for (var i = 0; i < 3; i++)
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cm.execCommand("goCharRight");
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} else if (type == "surround") {
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var sels = cm.getSelections();
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for (var i = 0; i < sels.length; i++)
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sels[i] = left + sels[i] + right;
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cm.replaceSelections(sels, "around");
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sels = cm.listSelections().slice();
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for (var i = 0; i < sels.length; i++)
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sels[i] = contractSelection(sels[i]);
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cm.setSelections(sels);
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} else if (type == "both") {
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cm.replaceSelection(left + right, null);
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cm.triggerElectric(left + right);
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cm.execCommand("goCharLeft");
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} else if (type == "addFour") {
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cm.replaceSelection(left + left + left + left, "before");
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cm.execCommand("goCharRight");
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}
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});
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}
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function isClosingBracket(ch, pairs) {
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var pos = pairs.lastIndexOf(ch);
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return pos > -1 && pos % 2 == 1;
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}
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function charsAround(cm, pos) {
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var str = cm.getRange(Pos(pos.line, pos.ch - 1),
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Pos(pos.line, pos.ch + 1));
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return str.length == 2 ? str : null;
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}
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// Project the token type that will exists after the given char is
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// typed, and use it to determine whether it would cause the start
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// of a string token.
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function enteringString(cm, pos, ch) {
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var line = cm.getLine(pos.line);
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var token = cm.getTokenAt(pos);
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if (/\bstring2?\b/.test(token.type) || stringStartsAfter(cm, pos)) return false;
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var stream = new CodeMirror.StringStream(line.slice(0, pos.ch) + ch + line.slice(pos.ch), 4);
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stream.pos = stream.start = token.start;
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for (;;) {
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var type1 = cm.getMode().token(stream, token.state);
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if (stream.pos >= pos.ch + 1) return /\bstring2?\b/.test(type1);
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stream.start = stream.pos;
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}
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}
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function stringStartsAfter(cm, pos) {
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var token = cm.getTokenAt(Pos(pos.line, pos.ch + 1))
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return /\bstring/.test(token.type) && token.start == pos.ch
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}
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});
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