Caret/js/ace/ext-whitespace.js

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/* ***** BEGIN LICENSE BLOCK *****
* Distributed under the BSD license:
*
* Copyright (c) 2010, Ajax.org B.V.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of Ajax.org B.V. nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL AJAX.ORG B.V. BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* ***** END LICENSE BLOCK ***** */
ace.define('ace/ext/whitespace', ['require', 'exports', 'module' , 'ace/lib/lang'], function(require, exports, module) {
var lang = require("../lib/lang");
exports.$detectIndentation = function(lines, fallback) {
var stats = [];
var changes = [];
var tabIndents = 0;
var prevSpaces = 0;
var max = Math.min(lines.length, 1000);
for (var i = 0; i < max; i++) {
var line = lines[i];
if (!/^\s*[^*+\-\s]/.test(line))
continue;
var tabs = line.match(/^\t*/)[0].length;
if (line[0] == "\t")
tabIndents++;
var spaces = line.match(/^ */)[0].length;
if (spaces && line[spaces] != "\t") {
var diff = spaces - prevSpaces;
if (diff > 0 && !(prevSpaces%diff) && !(spaces%diff))
changes[diff] = (changes[diff] || 0) + 1;
stats[spaces] = (stats[spaces] || 0) + 1;
}
prevSpaces = spaces;
while (i < max && line[line.length - 1] == "\\")
line = lines[i++];
}
if (!stats.length)
return;
function getScore(indent) {
var score = 0;
for (var i = indent; i < stats.length; i += indent)
score += stats[i] || 0;
return score;
}
var changesTotal = changes.reduce(function(a,b){return a+b}, 0);
var first = {score: 0, length: 0};
var spaceIndents = 0;
for (var i = 1; i < 12; i++) {
if (i == 1) {
spaceIndents = getScore(i);
var score = 1;
} else
var score = getScore(i) / spaceIndents;
if (changes[i]) {
score += changes[i] / changesTotal;
}
if (score > first.score)
first = {score: score, length: i};
}
if (first.score && first.score > 1.4)
var tabLength = first.length;
if (tabIndents > spaceIndents + 1)
return {ch: "\t", length: tabLength};
if (spaceIndents + 1 > tabIndents)
return {ch: " ", length: tabLength};
};
exports.detectIndentation = function(session) {
var lines = session.getLines(0, 1000);
var indent = exports.$detectIndentation(lines) || {};
if (indent.ch)
session.setUseSoftTabs(indent.ch == " ");
if (indent.length)
session.setTabSize(indent.length);
return indent;
};
exports.trimTrailingSpace = function(session, trimEmpty) {
var doc = session.getDocument();
var lines = doc.getAllLines();
var min = trimEmpty ? -1 : 0;
for (var i = 0, l=lines.length; i < l; i++) {
var line = lines[i];
var index = line.search(/\s+$/);
if (index > min)
doc.removeInLine(i, index, line.length);
}
};
exports.convertIndentation = function(session, ch, len) {
var oldCh = session.getTabString()[0];
var oldLen = session.getTabSize();
if (!len) len = oldLen;
if (!ch) ch = oldCh;
var tab = ch == "\t" ? ch: lang.stringRepeat(ch, len);
var doc = session.doc;
var lines = doc.getAllLines();
var cache = {};
var spaceCache = {};
for (var i = 0, l=lines.length; i < l; i++) {
var line = lines[i];
var match = line.match(/^\s*/)[0];
if (match) {
var w = session.$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",
exec: function(editor) {
exports.detectIndentation(editor.session);
}
}, {
name: "trimTrailingSpace",
exec: function(editor) {
exports.trimTrailingSpace(editor.session);
}
}, {
name: "convertIndentation",
exec: function(editor, arg) {
var indent = exports.$parseArg(arg);
exports.convertIndentation(editor.session, indent.ch, indent.length);
}
}, {
name: "setIndentation",
exec: function(editor, arg) {
var indent = exports.$parseArg(arg);
indent.length && editor.session.setTabSize(indent.length);
indent.ch && editor.session.setUseSoftTabs(indent.ch == " ");
}
}];
});
;
(function() {
ace.require(["ace/ext/whitespace"], function() {});
})();