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ext-whitespace.js
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ext-whitespace.js
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ace.define("ace/ext/whitespace",["require","exports","module","ace/lib/lang"], function(require, exports, module){"use strict";
var lang = require("../lib/lang");
exports.$detectIndentation = function (lines, fallback) {
var stats = [];
var changes = [];
var tabIndents = 0;
var prevSpaces = 0;
var max = Math.min(lines.length, 1000);
for (var i = 0; i < max; i++) {
var line = lines[i];
if (!/^\s*[^*+\-\s]/.test(line))
continue;
if (line[0] == "\t") {
tabIndents++;
prevSpaces = -Number.MAX_VALUE;
}
else {
var spaces = line.match(/^ */)[0].length;
if (spaces && line[spaces] != "\t") {
var diff = spaces - prevSpaces;
if (diff > 0 && !(prevSpaces % diff) && !(spaces % diff))
changes[diff] = (changes[diff] || 0) + 1;
stats[spaces] = (stats[spaces] || 0) + 1;
}
prevSpaces = spaces;
}
while (i < max && line[line.length - 1] == "\\")
line = lines[i++];
}
function getScore(indent) {
var score = 0;
for (var i = indent; i < stats.length; i += indent)
score += stats[i] || 0;
return score;
}
var changesTotal = changes.reduce(function (a, b) { return a + b; }, 0);
var first = { score: 0, length: 0 };
var spaceIndents = 0;
for (var i = 1; i < 12; i++) {
var score = getScore(i);
if (i == 1) {
spaceIndents = score;
score = stats[1] ? 0.9 : 0.8;
if (!stats.length)
score = 0;
}
else
score /= spaceIndents;
if (changes[i])
score += changes[i] / changesTotal;
if (score > first.score)
first = { score: score, length: i };
}
if (first.score && first.score > 1.4)
var tabLength = first.length;
if (tabIndents > spaceIndents + 1) {
if (tabLength == 1 || spaceIndents < tabIndents / 4 || first.score < 1.8)
tabLength = undefined;
return { ch: "\t", length: tabLength };
}
if (spaceIndents > tabIndents + 1)
return { ch: " ", length: tabLength };
};
exports.detectIndentation = function (session) {
var lines = session.getLines(0, 1000);
var indent = exports.$detectIndentation(lines) || {};
if (indent.ch)
session.setUseSoftTabs(indent.ch == " ");
if (indent.length)
session.setTabSize(indent.length);
return indent;
};
exports.trimTrailingSpace = function (session, options) {
var doc = session.getDocument();
var lines = doc.getAllLines();
var min = options && options.trimEmpty ? -1 : 0;
var cursors = [], ci = -1;
if (options && options.keepCursorPosition) {
if (session.selection.rangeCount) {
session.selection.rangeList.ranges.forEach(function (x, i, ranges) {
var next = ranges[i + 1];
if (next && next.cursor.row == x.cursor.row)
return;
cursors.push(x.cursor);
});
}
else {
cursors.push(session.selection.getCursor());
}
ci = 0;
}
var cursorRow = cursors[ci] && cursors[ci].row;
for (var i = 0, l = lines.length; i < l; i++) {
var line = lines[i];
var index = line.search(/\s+$/);
if (i == cursorRow) {
if (index < cursors[ci].column && index > min)
index = cursors[ci].column;
ci++;
cursorRow = cursors[ci] ? cursors[ci].row : -1;
}
if (index > min)
doc.removeInLine(i, index, line.length);
}
};
exports.convertIndentation = function (session, ch, len) {
var oldCh = session.getTabString()[0];
var oldLen = session.getTabSize();
if (!len)
len = oldLen;
if (!ch)
ch = oldCh;
var tab = ch == "\t" ? ch : lang.stringRepeat(ch, len);
var doc = session.doc;
var lines = doc.getAllLines();
var cache = {};
var spaceCache = {};
for (var i = 0, l = lines.length; i < l; i++) {
var line = lines[i];
var match = line.match(/^\s*/)[0];
if (match) {
var w = session.$getStringScreenWidth(match)[0];
var tabCount = Math.floor(w / oldLen);
var reminder = w % oldLen;
var toInsert = cache[tabCount] || (cache[tabCount] = lang.stringRepeat(tab, tabCount));
toInsert += spaceCache[reminder] || (spaceCache[reminder] = lang.stringRepeat(" ", reminder));
if (toInsert != match) {
doc.removeInLine(i, 0, match.length);
doc.insertInLine({ row: i, column: 0 }, toInsert);
}
}
}
session.setTabSize(len);
session.setUseSoftTabs(ch == " ");
};
exports.$parseStringArg = function (text) {
var indent = {};
if (/t/.test(text))
indent.ch = "\t";
else if (/s/.test(text))
indent.ch = " ";
var m = text.match(/\d+/);
if (m)
indent.length = parseInt(m[0], 10);
return indent;
};
exports.$parseArg = function (arg) {
if (!arg)
return {};
if (typeof arg == "string")
return exports.$parseStringArg(arg);
if (typeof arg.text == "string")
return exports.$parseStringArg(arg.text);
return arg;
};
exports.commands = [{
name: "detectIndentation",
description: "Detect indentation from content",
exec: function (editor) {
exports.detectIndentation(editor.session);
}
}, {
name: "trimTrailingSpace",
description: "Trim trailing whitespace",
exec: function (editor, args) {
exports.trimTrailingSpace(editor.session, args);
}
}, {
name: "convertIndentation",
description: "Convert indentation to ...",
exec: function (editor, arg) {
var indent = exports.$parseArg(arg);
exports.convertIndentation(editor.session, indent.ch, indent.length);
}
}, {
name: "setIndentation",
description: "Set indentation",
exec: function (editor, arg) {
var indent = exports.$parseArg(arg);
indent.length && editor.session.setTabSize(indent.length);
indent.ch && editor.session.setUseSoftTabs(indent.ch == " ");
}
}];
}); (function() {
ace.require(["ace/ext/whitespace"], function(m) {
if (typeof module == "object" && typeof exports == "object" && module) {
module.exports = m;
}
});
})();

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