Orbit/app/assets/javascripts/codemirror/addon/edit/closebrackets.js

81 lines
3.2 KiB
JavaScript

(function() {
var DEFAULT_BRACKETS = "()[]{}''\"\"";
var DEFAULT_EXPLODE_ON_ENTER = "[]{}";
var SPACE_CHAR_REGEX = /\s/;
CodeMirror.defineOption("autoCloseBrackets", false, function(cm, val, old) {
if (old != CodeMirror.Init && old)
cm.removeKeyMap("autoCloseBrackets");
if (!val) return;
var pairs = DEFAULT_BRACKETS, explode = DEFAULT_EXPLODE_ON_ENTER;
if (typeof val == "string") pairs = val;
else if (typeof val == "object") {
if (val.pairs != null) pairs = val.pairs;
if (val.explode != null) explode = val.explode;
}
var map = buildKeymap(pairs);
if (explode) map.Enter = buildExplodeHandler(explode);
cm.addKeyMap(map);
});
function charsAround(cm, pos) {
var str = cm.getRange(CodeMirror.Pos(pos.line, pos.ch - 1),
CodeMirror.Pos(pos.line, pos.ch + 1));
return str.length == 2 ? str : null;
}
function buildKeymap(pairs) {
var map = {
name : "autoCloseBrackets",
Backspace: function(cm) {
if (cm.somethingSelected()) return CodeMirror.Pass;
var cur = cm.getCursor(), around = charsAround(cm, cur);
if (around && pairs.indexOf(around) % 2 == 0)
cm.replaceRange("", CodeMirror.Pos(cur.line, cur.ch - 1), CodeMirror.Pos(cur.line, cur.ch + 1));
else
return CodeMirror.Pass;
}
};
var closingBrackets = "";
for (var i = 0; i < pairs.length; i += 2) (function(left, right) {
if (left != right) closingBrackets += right;
function surround(cm) {
var selection = cm.getSelection();
cm.replaceSelection(left + selection + right);
}
function maybeOverwrite(cm) {
var cur = cm.getCursor(), ahead = cm.getRange(cur, CodeMirror.Pos(cur.line, cur.ch + 1));
if (ahead != right || cm.somethingSelected()) return CodeMirror.Pass;
else cm.execCommand("goCharRight");
}
map["'" + left + "'"] = function(cm) {
if (left == "'" && cm.getTokenAt(cm.getCursor()).type == "comment")
return CodeMirror.Pass;
if (cm.somethingSelected()) return surround(cm);
if (left == right && maybeOverwrite(cm) != CodeMirror.Pass) return;
var cur = cm.getCursor(), ahead = CodeMirror.Pos(cur.line, cur.ch + 1);
var line = cm.getLine(cur.line), nextChar = line.charAt(cur.ch);
if (line.length == cur.ch || closingBrackets.indexOf(nextChar) >= 0 || SPACE_CHAR_REGEX.test(nextChar))
cm.replaceSelection(left + right, {head: ahead, anchor: ahead});
else
return CodeMirror.Pass;
};
if (left != right) map["'" + right + "'"] = maybeOverwrite;
})(pairs.charAt(i), pairs.charAt(i + 1));
return map;
}
function buildExplodeHandler(pairs) {
return function(cm) {
var cur = cm.getCursor(), around = charsAround(cm, cur);
if (!around || pairs.indexOf(around) % 2 != 0) return CodeMirror.Pass;
cm.operation(function() {
var newPos = CodeMirror.Pos(cur.line + 1, 0);
cm.replaceSelection("\n\n", {anchor: newPos, head: newPos}, "+input");
cm.indentLine(cur.line + 1, null, true);
cm.indentLine(cur.line + 2, null, true);
});
};
}
})();